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Core Data from the Deep Sea Drilling Project


Leg : 61    Top/Bottom Interval(mm):   40/  70  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   563.00   Rock Type: IGNEOUS
Core:  14   Sample Midpoint(m)     :   564.56   Sect/Pc #:  2/PCE 1

ROCK = APHYRIC TO MODERATELY MICROPHYRIC BASALT
       SHARP CONTACT BETWEEN APHYRIC BASALT AND
       MODERATELY MICROPHYRIC BASALT,ROCK IS 80% ALTERED;
       Texture: APHYRIC-MODERATELY MICROPHYRIC,INTERSERTAL;
       Where sampled: CHILLED SILL MARGIN
       TOP MARGIN OF SILL*

Phenocrysts- OLIVINE                   (    0%)
             IN MODERATELY MICROPHYRIC PART;

             OLIVINE                   (    0%)
             Size(mm):    .05X0.6
             IN APHYRIC PART;

             PLAGIOCLASE               (  2.6%)
             Morphology: ELONGATE PRISMS
             MICROPHENOS IN MODERATELY MICROPHYRIC PART,
             AVERAGE DIMENSIONS = 0.05 X 0.6 MM,APPROX COMP
             AN65-45 (QUESTIONABLE),THIN MARGIN ENVELOPES ARE
             MORE ACIDIC;

             PLAGIOCLASE               (   TR%)
             Size(mm):   0.05X0.6  Morphology: ELONGATE PRISMS
             MICROPHENOS IN APHYRIC PART,AVERAGE DIMENSIONS =
             0.05 X 0.6 MM,APPROX COMP AN65-45 (QUESTIONABLE),
             THIN MARGINAL ENVELOPES ARE MORE ACIDIC;

             CLINOPYROXENE             (    2%)
             Size(mm):        0.5  Morphology: EQUIDIMENSIONAL
             MICROPHENOS IN MODERATELY MICROPHYRIC PART,0.5 MM
             ACROSS;

             CLINOPYROXENE             (   TR%)
             Size(mm):        0.5  Morphology: EQUIDIMENSIONAL
             MICROPHENOS IN APHYRIC PART,0.5 MM ACROSS;

             MAGNETITE                 (  0.4%)
             Size(mm):        0.6
             MICROPHENOS IN MODERATELY MICROPHYRIC PART,0.6 MM
             ACROSS,DEEPLY ALTERED TO DARK BROWN OXIDES;

             MAGNETITE                 (    0%)
             Size(mm):        0.6
             IN APHYRIC PART*

Groundmass - OLIVINE                   (    0%)

             PLAGIOCLASE
             ALTERED MICROLITES,APPROX COMP AN32-65;

             CLINOPYROXENE
             Morphology: EQUIDIMENSIONAL
             ALTERED;

             MAGNETITE                 (   10%)
             Size(mm):      <0.04  Morphology: DUST-LIKE
             ALTERED PARTLY TO HYDROXIDES;

             GLASS                     (  >70%)
             ALTERED*

Alteration - CARBONATE
             Location: VEIN INTERIOR
             COLLOFORM AGGREGATES;

             CLAY MINERALS
             Location: VEIN MARGINS,  Replacing: GLASS,GROUNDMASS
             Location: GROUNDMASS
             BRIGHT GREEN IN VEINS AND PALE GREEN IN
             GROUNDMASS;

             PYRITE
             Location: VEIN MARGINS
             ALTERED TO HYDROXIDES;

             OTHER
             MAGN DEEPLY ALTERED TO DARK BROWN HYDROXIDES;

             HYDROXIDE

Vesicles   -
             Percent:     0




Leg : 61    Top/Bottom Interval(mm):  290/ 320  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   563.00   Rock Type: IGNEOUS
Core:  14   Sample Midpoint(m)     :   564.81   Sect/Pc #:  2/PCE 3A

ROCK = APHYRIC BASALT
       ALTERED;
       Texture: APHYRIC,INTERGRANULAR-DIABASIC;
       Where sampled: INTERIOR OF SILL*

Phenocrysts- PLAGIOCLASE
             Size(mm):    0.8-1.0  Morphology: LATHS
             HEAVILY ALTERED*

Groundmass - PLAGIOCLASE               (   27%)
             Size(mm):    0.1-0.5
             APPROX COMP AN80 ZONED TO AN38,HEAVILY ALTERED;

             CLINOPYROXENE             (   25%)
             Size(mm):    0.1-0.4  Morphology: SUBHEDRAL-EUHEDRAL
             AUGITE,2VZ= 40;

             MAGNETITE                 (   10%)
             Size(mm): 0.004-0.08  Morphology: EUHEDRAL
             TI-MAGN,COLORLESS;

             GLASS                     (    0%)

             QUARTZ                    (   <1%)
             Size(mm):        0.1  Morphology: ANHEDRAL
             WITH APATITE INCLUSIONS*

Alteration - CLAY MINERALS             (    3%)
             BROWN;

             CHLORITE                  (   35%)
             Replacing: PLAG,CPX




Leg : 61    Top/Bottom Interval(mm):  440/ 480  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   566.50   Rock Type: IGNEOUS
Core:  15   Sample Midpoint(m)     :   566.96   Sect/Pc #:  1/PCE 2A

ROCK = APHYRIC BASALT
       HIGHLY ALTERED,ALTERATION VEIN PRESENT,TOTAL
       ALTERATION PRODUCTS= 35%;
       Texture: APHYRIC,INTERGRANULAR-DIABASIC;
       Where sampled: SILL INTERIOR*

Groundmass - OLIVINE                   (    0%)

             PLAGIOCLASE               (   30%)
             Size(mm):    0.1-0.3
             APPROX COMP AN50 ZONED TO ?;

             CLINOPYROXENE             (   20%)
             Size(mm):    0.1-0.4  Morphology: SUBHEDRAL
             CLEAR AND HEAVILY REPLACED (AMOST TOTALLY) BY
             GREEN CLAY AND CHLORITE (IN THAT ORDER);

             MAGNETITE                 (   15%)

             OTHER                     (   35%)
             ALTERATION PRODUCTS*

Alteration - COMBINATION               (   35%)
             Location: VEINS          Replacing: PYX
             INCLUDES CARB + CLAY MINS (BROWN AND GREEN--GREEN
             CLAY REPLACES PYX) + ZEOLITES + CHLORITE (REPLACES
             PYX AFTER GREEN CLAY) + FE AND MN OXIDES +
             HYDROXIDES

             CARBONATE
             Location: VEINS

             CLAY MINERALS
             Location: VEINS

             ZEOLITE
             Location: VEINS

             FERROUS OXIDE
             Location: VEINS

             MANGANESE OXIDE
             Location: VEINS

             HYDROXIDE
             Location: VEINS




Leg : 61    Top/Bottom Interval(mm): 1170/1200  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   566.50   Rock Type: IGNEOUS
Core:  15   Sample Midpoint(m)     :   567.69   Sect/Pc #:  1/PCE 2G

ROCK = APHYRIC BASALT
       ALTERED;
       Texture: APHYRIC,DIABASIC;
       Where sampled: SILL INTERIOR*

Groundmass - PLAGIOCLASE               (   20%)
             Size(mm):    0.1-0.5
             APPROX COMP AN70 TO AN50;

             CLINOPYROXENE             (   45%)
             Size(mm):    0.1-0.4  Morphology: SUBHEDRAL
             AUGITE,LIGHT GREENISH BROWN IN COLOR;

             MAGNETITE                 (   10%)
             Size(mm):   0.05-0.2
             TI-MAGN,DOES NOT INCLUDE THE DUST-LIKE MAGN FOUND
             WITH CLAY + ZEOLITES IN ALTERED ZONES*

Alteration - COMBINATION               (   25%)
             Replacing: CPX
             INCLUDES CLAY MINS (GREEN AND BROWN) + ZEOLITES
             (FIBROUS WITH LOW RELIEF) + MAGN DUST;

             CLAY MINERALS

             ZEOLITE




Leg : 61    Top/Bottom Interval(mm):   60/  90  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   566.50   Rock Type: IGNEOUS
Core:  15   Sample Midpoint(m)     :   568.08   Sect/Pc #:  2/PCE 1

ROCK = APHYRIC BASALT
       ALTERED;
       Texture: APHYRIC,DIABASIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   TR%)
             Size(mm):    0.3-0.5  Morphology: ANHEDRAL
             STRANGELY ZONED,APPROX COMP AN80*

Groundmass - PLAGIOCLASE               (   20%)
             Size(mm):    0.1-0.4
             APPROX COMP AN77 ZONED TO AN36;

             CLINOPYROXENE             (   70%)
             Size(mm):    0.1-0.5
             AUGITE,2VZ= 55,HALF OF CPX ALTERED TO GREEN CLAY;

             MAGNETITE                 (   10%)
             Size(mm):  0.005-0.2
             TI-MAGN,ALSO FINE GRAINED MAGN ASSOCIATED WITH
             GREEN CLAY*

Alteration - CLAY MINERALS             (   35%)
             Replacing: CPX
             GREEN;

             CALCITE                   (   <1%)
             Location: GROUNDMASS     Replacing: PLAG,CPX

             COMBINATION
             Location: VEIN
             INCLUDES 1)CALCITE + PYRITE  2)CALCITE  3)BROWN
             CLAY  4)CHALCEDONY  5)QUARTZ  AND 6)SECOND
             GENERATION OF CALCITE*




Leg : 61    Top/Bottom Interval(mm):  970/1010  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   572.00   Rock Type: IGNEOUS
Core:  16   Sample Midpoint(m)     :   572.99   Sect/Pc #:  1/PCE 1H

ROCK = APHYRIC BASALT
       ALTERED;
       Texture: APHYRIC,DIABASIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- OLIVINE
             IDENTITY AND/OR PERCENTAGE QUESTIONABLE;

             PLAGIOCLASE               (   <1%)
             Size(mm):    0.3-0.6  Morphology: SUBHEDRAL
             STRONGLY ZONED*

Groundmass - PLAGIOCLASE               (   25%)
             Size(mm):    0.2-0.7
             APPROX COMP AN75,NOT STRONGLY ZONED;

             CLINOPYROXENE             (   56%)
             Size(mm):    0.1-0.6  Morphology: SUBHEDRAL
             AUGITE,LIGHT BROWN;

             MAGNETITE                 (    7%)
             Size(mm):  0.002-0.3
             TI-MAGN*

Alteration - CARBONATE                 (    2%)
             PATCHY WHOLESALE REPLACEMENT OF ROCK;

             CLAY MINERALS             (   10%)
             GREEN,PATCHY WHOLESALE REPLACEMENT OF ROCK;

             COMBINATION
             Location: VEIN
             VEIN CONTAINS PYRITE + CA + CHALCEDONY + CLAY +
             QUARTZ*




Leg : 61    Top/Bottom Interval(mm): 1160/1190  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   572.00   Rock Type: IGNEOUS
Core:  16   Sample Midpoint(m)     :   573.17   Sect/Pc #:  1/PCE 1H

ROCK = APHYRIC BASALT
       VEIN IN HIGHLY ALTERED BASALT,BASALT IS SIMILAR
       TO PREVIOUS CORES,PERVASIVELY ALTERED TO GREEN
       CLAY + BROWN CLAY + MINOR CHLORITE;
       Texture: APHYRIC;
       Where sampled: VEIN FROM SILL INTERIOR*

Alteration - CALCITE

             CHLORITE

             CHALCEDONY

             PYRITE

             CLAY MINERALS
             BRIGHT YELLOW-GREEN + GREEN + BROWN CLAY,DOMINANT
             ALTERATION (PERVASIVE)*




Leg : 61    Top/Bottom Interval(mm): 1370/1400  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   572.00   Rock Type: IGNEOUS
Core:  16   Sample Midpoint(m)     :   573.39   Sect/Pc #:  1/PCE 1I

ROCK = BASALT VEIN;
       Where sampled: VEIN IN ALTERED BASALT*

Alteration - QUARTZ
             Location: VEIN

             CALCITE
             Location: VEIN
             FIRST + SECOND GENERATIONS;

             PYRITE
             Location: VEIN

             CLAY
             Location: VEIN
             GREEN + BROWN;

             CHALCEDONY
             Location: VEIN

             ZEOLITE
             Location: VEIN
             PRESENCE QUESTIONABLE;

             FERROUS OXIDE
             Location: VEIN

             FERROUS HYDROX MINS
             Location: VEIN

             MANGANESE OXIDE
             Location: VEIN

             MANGANESE HYDROXIDE
             Location: VEIN




Leg : 61    Top/Bottom Interval(mm):  980/1000  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   574.00   Rock Type: IGNEOUS
Core:  17   Sample Midpoint(m)     :   574.99   Sect/Pc #:  1/PCE 1E

ROCK = DOLERITE;
       Texture: SUBOPHITIC;
       Where sampled: INTERIOR OF SILL*

Phenocrysts- PLAGIOCLASE               (    2%)
             Size(mm):    0.4-0.5  Morphology: ACICULAR-PRISMATIC
             MICROPHENOS*

Groundmass - PLAGIOCLASE               (   47%)
             Size(mm):       <0.2  Morphology: SUBHEDRAL
             APPROX COMP AN70-58,MICROLITIC TO GROUNDMASS;

             CLINOPYROXENE             (   46%)
             Size(mm):       <0.2  Morphology: SUBHEDRAL
             MICROLITIC TO GROUNDMASS;

             MAGNETITE                 (    5%)
             Size(mm):      <0.05  Morphology: PRISMATIC
             OBSERVED MORE FREQUENTLY IN ALTERED PART*

Alteration - CLAY MINERALS             (   25%)
             Location: SPOTS,         Replacing: CPX
             Location: MESOSTASIS




Leg : 61    Top/Bottom Interval(mm):  360/ 380  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   574.00   Rock Type: IGNEOUS
Core:  17   Sample Midpoint(m)     :   575.87   Sect/Pc #:  2/PCE 2B

ROCK = DOLERITE;
       Texture: SUBOPHITIC;
       Where sampled: INTERIOR OF SILL*

Phenocrysts- PLAGIOCLASE               (    3%)
             Size(mm):    0.5-1.0  Morphology: PRISMATIC
             APPROX COMP AN55-60,MICROPHENOS TO PHENOS;

             CLINOPYROXENE             (    1%)
             Size(mm):        0.5
             ASSOCIATES WITH PLAG LATHS,MICROPHENOS TO PHENOS*

Groundmass - PLAGIOCLASE               (   45%)
             Size(mm):       <0.2  Morphology: SUBHEDRAL-EUHEDRAL
             MICROLITIC TO GROUNDMASS,OFTEN IN SPHERULITIC
             AGGREGATES WITH CPX;

             CLINOPYROXENE             (   46%)
             Size(mm):       <0.2  Morphology: SUBHEDRAL
             MICROLITIC TO GROUNDMASS,OFTEN IN SPHERULITIC
             AGGREGATES WITH PLAG;

             MAGNETITE                 (    5%)
             Size(mm):      <0.05  Morphology: PRISMATIC
             MICROLITIC TO GROUNDMASS,MAGN IS OBSERVED MORE
             FREQUENTLY IN ALTERED PART*

Alteration - CLAY MINERALS             (   30%)
             Location: SPOTS,         Replacing: CPX
             Location: MESOSTASIS




Leg : 61    Top/Bottom Interval(mm): 1280/1300  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   576.00   Rock Type: IGNEOUS
Core:  18   Sample Midpoint(m)     :   577.29   Sect/Pc #:  1/PCE 5C

ROCK = PLAG-CPX PHYRIC DOLERITE;
       Texture: PORPHYRITIC,SUBOPHITIC;
       Where sampled: INTERIOR OF SILL*

Phenocrysts- PLAGIOCLASE               (    7%)
             Size(mm):    0.4-0.7  Morphology: SUBHEDRAL-EUHEDRAL
             APPROX COMP AN60,MICROPHENOS TO PHENOS;

             CLINOPYROXENE             (    7%)
             Size(mm):    0.4-0.8  Morphology: SUBHEDRAL-EUHEDRAL
             MICROPHENOS TO PHENOS*

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):       <0.4  Morphology: PARTLY SPHERULITIC
             MICROLITIC TO GROUNDMASS;

             CLINOPYROXENE             (   40%)
             Size(mm):       <0.4  Morphology: PRISMATIC
             MICROLITIC TO GROUNDMASS;

             MAGNETITE                 (    6%)
             Size(mm):      <0.05  Morphology: PARTLY DUST-LIKE
             MAGN IS OBSERVED MORE FREQUENTLY IN ALTERED AREA,
             MICROLITIC TO GROUNDMASS*

Alteration - CLAY MINERALS             (   25%)
             Location: SPOTS          Replacing: CPX PHENOS,PLAG
             CPX PHENOS AND PLAG IN THE MESOSTASIS ARE ALTERED*




Leg : 61    Top/Bottom Interval(mm):  480/ 500  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   576.00   Rock Type: IGNEOUS
Core:  18   Sample Midpoint(m)     :   577.99   Sect/Pc #:  2/PCE 2B

ROCK = DOLERITE;
       Texture: SUBOPHITIC;
       Where sampled: INTERIOR OF SILL*

Phenocrysts- PLAGIOCLASE               (    7%)
             Size(mm):    0.4-0.9  Morphology: LATHS
             APPROX COMP AN55,SOME LARGE PLATES OF CPX
             ENCLOSING LATHS OF PLAG (OPHITIC TEXTURE),
             MICROPHENOS TO PHENOS;

             CLINOPYROXENE             (    8%)
             Size(mm):      0.4-1  Morphology: PLATES
             SOME LARGE PLATES OF CPX ENCLOSING LATHS OF PLAG
             (OPHITIC TEXTURE),MICROPHENOS TO PHENOS*

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):    0.1-0.4  Morphology: SUBHEDRAL-EUHEDRAL
             MICROLITIC;

             CLINOPYROXENE             (   39%)
             Size(mm):    0.1-0.4  Morphology: SUBHEDRAL-EUHEDRAL
             MICROLITIC;

             MAGNETITE                 (    6%)
             Size(mm):       <0.1  Morphology: PARTLY DUST-LIKE
             MICROLITIC;

             QUARTZ                    (   TR%)

             ALKALI FELDSPAR           (   TR%)

Alteration - CLAY MINERALS             (   30%)
             Location: SPOTS          Replacing: CPX,PLAG,CPX PHENOS
             PHENOS OF CPX AND MICROLITES OF PLAG + CPX ARE
             ALTERED*




Leg : 61    Top/Bottom Interval(mm):  100/ 120  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   578.00   Rock Type: IGNEOUS
Core:  19   Sample Midpoint(m)     :   578.11   Sect/Pc #:  1/PCE 1

ROCK = MICRODOLORITE;
       Texture: MICRODOLERITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- OLIVINE
             Size(mm):    0.2-0.4  Morphology: EUHEDRAL
             PCT. UNCERTAIN,SMEC PSEUDOMORPHS,MICROPHENOS;

             PLAGIOCLASE               (    1%)
             Morphology: ELONGATE PRISMS,TABULAR
             MICROPHENOS,DIMENSIONS ARE 0.08-0.1 X 0.3-1.6 MM,
             APPROX COMP AN42-90,MARGINS ARE MORE ACIDIC;

             CLINOPYROXENE             (   TR%)

Groundmass - PLAGIOCLASE               (   55%)
             DIMENSIONS ARE 0.02-0.12 X 0.2-0.6 MM,APPROX COMP
             AN60-80,MICROLITIC;

             CLINOPYROXENE             (   36%)
             Size(mm):   0.08-0.6  Morphology: EQUIDIMENSIONAL

             MAGNETITE                 (    8%)
             Size(mm):   0.06-0.2  Morphology: INTERGRANULAR

             GLASS                     (   15%)
             PERCENTAGE QUESTIONABLE,ALTERED TO DARKLY BROWN
             CLAY*

Alteration - CLAY MINERALS             (   15%)
             Replacing: OL,PYX,GLASS
             ISOLATED PSEUDOMORPHS,OL REPLACED BY SMECTITE
             PSEUDOMORPHS,GLASS ALTERED TO DARK BROWN CLAY*




Leg : 61    Top/Bottom Interval(mm):  490/ 510  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   578.00   Rock Type: IGNEOUS
Core:  19   Sample Midpoint(m)     :   578.50   Sect/Pc #:  1/PCE 2

ROCK = MICRODOLERITE;
       Texture: MICRODOLORITIC-INTERSERTAL;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (    1%)
             Size(mm):    0.8X1.5  Morphology: TABULAR
             APPROX COMP AN62-45,ZONED,DIMENSIONS ARE 0.8 X
             1.5 MM;

             CLINOPYROXENE             (   TR%)
             Size(mm):    0.6X0.8
             DIMENSIONS ARE 0.6 X 0.8 MM*

Groundmass - PLAGIOCLASE               (   31%)
             Morphology: PRISMS,MICROLITIC
             MICROLITIC;

             CLINOPYROXENE             (   45%)
             Morphology: ANHEDRAL

             MAGNETITE                 (    8%)
             Morphology: INTERGRANULAR

             GLASS                     (   15%)
             INTERSTITIAL,ALTERED TO DARK-BROWN CLAY*

Alteration - SPHENE                    (   TR%)
             Location: VEINS
             IN LEUCOXENE AGGREGATES NEAR AND WITHIN VEINS,
             HYDROTHERMAL VEIN FILLING;

             CARBONATE                 (   <1%)
             SMALL RELICTS IN CLAY,HYDROTHERMAL VEIN FILLING;

             CLAY MINERALS             (    9%)
             Location: VEIN INTERIOR  Replacing: GLASS
             HYDROTHERMAL VEIN FILLING,GLASS ALTERED TO DARK
             BROWN CLAY;

             ZEOLITE                   (    3%)
             Location: VEINS
             INTERIOR OF VEINS AND LATER VEINS,HYDROTHERMAL
             VEIN FILLING;

             MUSCOVITE                 (    2%)
             Location: VEIN MARGINS   Replacing: CLAY.MIN,PYX
             MUSCOVITE OR PARAGONITE,REPLACING CLAY + FIBROUS
             RADIAL AGGREGATES OF PYX,HYDROTHERMAL VEIN
             FILLING*




Leg : 61    Top/Bottom Interval(mm):  580/ 600  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   578.00   Rock Type: IGNEOUS
Core:  19   Sample Midpoint(m)     :   580.09   Sect/Pc #:  2/PCE 2

ROCK = APHYRIC BASALT
       ALTERED,ALL.MINS AND GLASS ARE A PALE GRAYISH
       GREEN COLOR;
       Texture: APHYRIC,MICRODOLORITIC-INTERSERTAL;
       Where sampled: SILL BOTTOM*

Phenocrysts- PLAGIOCLASE               (   TR%)
             MICROPHENOS*

Groundmass - PLAGIOCLASE
             HEAVILY ALTERED;

             CLINOPYROXENE
             HEAVILY ALTERED;

             MAGNETITE                 (   12%)

             GLASS
             PERCENTAGE UNCERTAIN,ALTERED*

Alteration - CLAY MINERALS             (   60%)
             Replacing: ALL.MINS,GLASS
             PALE GRAYISH-GREEN COLOR*

Vesicles   -
             Percent:     0




Leg : 61    Top/Bottom Interval(mm):  910/ 930  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   578.00   Rock Type: IGNEOUS
Core:  19   Sample Midpoint(m)     :   580.42   Sect/Pc #:  2/PCE 2

ROCK = CPX-PLAG MODERATELY MICROPHYRIC BASALT
       ALTERED;
       Texture: MODERATELY MICROPHYRIC,HYALOPILITIC-VARIOLITIC;
       Where sampled: SILL TOP*

Phenocrysts- OLIVINE                   (    0%)

             PLAGIOCLASE               (   TR%)

             CLINOPYROXENE             (    2%)
             Size(mm):    0.2-1.0  Morphology: EUHEDRAL

Groundmass - PLAGIOCLASE               (   15%)
             Size(mm):      <0.02  Morphology: LATHS,NEEDLES

             CLINOPYROXENE             (    2%)
             Size(mm):      <0.02  Morphology: EQUIDIMENSIONAL

             MAGNETITE                 (    8%)
             Size(mm):      <0.02  Morphology: DUST-LIKE

             GLASS                     (   73%)
             MESOSTASIS DEEPLY ALTERED*

Alteration - CLAY MINERALS             (   80%)
             Replacing: ALL.MINS,GLASS




Leg : 61    Top/Bottom Interval(mm): 1130/1160  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   578.00   Rock Type: IGNEOUS
Core:  19   Sample Midpoint(m)     :   580.65   Sect/Pc #:  2/PCE 2

ROCK = CPX-PLAG MODERATELY PHYRIC BASALT;
       Texture: MODERATELY PORPHYRITIC,INTERSERTAL;
       Where sampled: NEXT TO GLASSY MARGIN OF SILL*

Phenocrysts- PLAGIOCLASE               (   TR%)
             Size(mm):    0.1X1.2  Morphology: ELONGATE PRISMS
             DIMENSIONS ARE 0.1 X 1.2 MM;

             CLINOPYROXENE             (    2%)
             Size(mm):    0.2-1.0  Morphology: EQUIDIMENSIONAL

Groundmass - PLAGIOCLASE               (   20%)
             Size(mm):      <0.04  Morphology: LATHS

             CLINOPYROXENE             (    2%)
             Size(mm):       0.04  Morphology: IRREGULAR

             MAGNETITE                 (    8%)
             Size(mm):      <0.02  Morphology: DUST-LIKE

             GLASS                     (   68%)
             OPAQUE MESOSTASIS*

Alteration - CLAY MINERALS             (   70%)
             Location: MESOSTASIS     Replacing: GLASS




Leg : 61    Top/Bottom Interval(mm):  720/ 740  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   581.00   Rock Type: IGNEOUS
Core:  20   Sample Midpoint(m)     :   581.73   Sect/Pc #:  1/PCE 2E

ROCK = CPX SPARSELY PHYRIC BASALT;
       Texture: SPARSELY PORPHYRITIC,INTERSERTAL-VARIOLITIC;
       Where sampled: NEXT TO GLASSY MARGIN OF SILL*

Phenocrysts- CLINOPYROXENE             (    2%)
             Size(mm):    0.5-1.2  Morphology: EQUIDIMENSIONAL

Groundmass - PLAGIOCLASE
             Size(mm):      <0.04

             CLINOPYROXENE
             Size(mm):      <0.02
             SPOTS OF VARIOLITIC AGGREGATES ARE COMMON;

             MAGNETITE                 (    7%)
             Morphology: DUST-LIKE,INTERGRANULAR
             SPOTS IN THE MESOSTASIS;

             GLASS                     (   30%)
             SPOTS AND INTERSTITIAL*

Alteration - CLAY MINERALS             (   30%)
             Location: MESOSTASIS,    Replacing: ALL.MINS,GLASS
             Location: GLASS SPOTS

Vesicles   -
             Size(mm):     0.08
             Percent:     2
             Location: GROUNDMASS
             Filling: ZEOLITES
             Shape: ELONGATE,

             Shape: IRREGULAR
             VUGS,FILLING QUESTIONABLE,SURROUNDED BY
             VARIOLITIC AGGREGATES*




Leg : 61    Top/Bottom Interval(mm): 1440/1460  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   581.00   Rock Type: IGNEOUS
Core:  20   Sample Midpoint(m)     :   582.45   Sect/Pc #:  1/PCE 4C

ROCK = CPX-PLAG-OL MODERATELY PHYRIC BASALT;
       Texture: MODERATELY MICROPHYRIC,INTERSERTAL;
       Where sampled: SILL INTERIOR*

Phenocrysts- OLIVINE
             PERCENTAGE UNKNOWN,PSEUDOMORPHS AFTER GREEN CLAY;

             PLAGIOCLASE               (    1%)
             Size(mm):    0.2-0.4
             APPROX COMP AN60;

             CLINOPYROXENE             (    2%)
             Size(mm):    0.3-0.6  Morphology: EUHEDRAL
             AUGITE,TWINNED AND WITH INCLUSIONS*

Groundmass - PLAGIOCLASE               (   25%)
             Size(mm):       <0.2  Morphology: SKELETAL
             MICROLITE AND CRYSTALLITES,APPROX COMP AN55
             USUALLY;

             CLINOPYROXENE             (   47%)
             Size(mm):      <0.08
             AUGITE,QUENCH TEXTURES,2VZ= 50;

             MAGNETITE                 (   10%)
             Size(mm):      <0.02  Morphology: ANHEDRAL-EUHEDRAL
             TI-MAGN*

Alteration - CLAY MINERALS             (   15%)
             Replacing: CPX,GROUNDMASS
             GREEN + BROWN*




Leg : 61    Top/Bottom Interval(mm):  930/ 950  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   581.00   Rock Type: IGNEOUS
Core:  20   Sample Midpoint(m)     :   583.44   Sect/Pc #:  2/PCE 3F

ROCK = CPX MODERATELY MICROPHYRIC BASALT
       ALTERED;
       Texture: MODERATELY MICROPHYRIC,INTERGRANULAR-DIABASIC
       (SUBOPHITIC);
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (  <<1%)
             Size(mm):        0.5

             CLINOPYROXENE             (    3%)
             Size(mm):    0.3-0.5
             AUGITE,MICROPHENOS*

Groundmass - OLIVINE
             PRESENCE QUESTIONABLE;

             PLAGIOCLASE               (   25%)
             Size(mm):    0.2-0.5  Morphology: EUHEDRAL-SUBHEDRAL
             APPROX COMP AN60-AN50;

             CLINOPYROXENE             (   44%)
             Size(mm):   0.05-0.2  Morphology: SUBHEDRAL-EUHEDRAL
             AUGITE,LIGHT BROWN COLOR;

             MAGNETITE                 (   10%)
             Size(mm):  0.005-0.2
             TITANOMAGNETITE;

             GLASS                     (    3%)
             REPLACED BY CLAY,INTERSTITIAL TRIANGULAR PATCHES*

Alteration - CLAY MINERALS             (   10%)
             Replacing: CPX,GLASS
             MIXED WITH SECONDARY MAGN DUST,GREEN;

             ZEOLITE                   (    5%)
             Replacing: CPX
             MIXED WITH SECONDARY MAGN DUST*




Leg : 61    Top/Bottom Interval(mm):  160/ 200  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   586.00   Rock Type: IGNEOUS
Core:  21   Sample Midpoint(m)     :   586.18   Sect/Pc #:  1/PCE 1A

ROCK = DOLERITE
       BADLY ALTERED;
       Texture: DIABASIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   TR%)
             Size(mm):    0.9-1.0
             ONLY ONE PHENO IN SECTION;

             CLINOPYROXENE             (    2%)
             Size(mm):    0.4-0.8
             AUGITE WITH OPHITIC PLAG*

Groundmass - PLAGIOCLASE               (   21%)
             Size(mm):    0.2-0.4  Morphology: SUBOPHITIC
             APPROX COMP AN68;

             CLINOPYROXENE             (   45%)
             Size(mm):    0.1-0.6  Morphology: SUBHEDRAL
             AUGITE,LIGHT BROWN;

             MAGNETITE                 (    5%)
             Size(mm):       <0.1  Morphology: SUBHEDRAL-EUHEDRAL
             TI-MAGN;

             GLASS                     (    2%)
             SMALL INTERSTITIAL PATCHES OF ALTERED GLASS,
             VARIOLITIC PATCHES WITH FRESH GLASS*

Alteration - CLAY MINERALS             (   25%)
             LARGE PATCHES (2 MM),WHOLESALE REPLACEMENT OF
             ROCK*




Leg : 61    Top/Bottom Interval(mm):  400/ 420  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   586.00   Rock Type: IGNEOUS
Core:  21   Sample Midpoint(m)     :   586.41   Sect/Pc #:  1/PCE 1A

ROCK = DOLERITE
       BADLY ALTERED;
       Texture: DIABASIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- CLINOPYROXENE             (    1%)
             Size(mm):    0.4-1.0  Morphology: SUBHEDRAL
             AUGITE*

Groundmass - PLAGIOCLASE               (   20%)
             Size(mm):    0.2-0.5  Morphology: SUBHEDRAL-EUHEDRAL
             APPROX COMP AN75-AN45;

             CLINOPYROXENE             (   36%)
             Size(mm):    0.1-0.3
             AUGITE,LIGHT BROWN COLOR;

             MAGNETITE                 (    5%)
             Size(mm):      <0.05
             TI-MAGN;

             GLASS                     (    8%)
             INTERSTITIAL ALTERED GLASS PATCHES*

Alteration - COMBINATION               (   30%)
             Location: VEINS,PATCHES
             LARGE PATCHES OF CLAY WITH MINOR (LATE) CHLORITE
             (ALSO IN VEINS);

             CLAY MINERALS
             Location: PATCHES,VEINS

             CHLORITE
             Location: PATCHES,VEINS




Leg : 61    Top/Bottom Interval(mm):  930/ 960  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   586.00   Rock Type: IGNEOUS
Core:  21   Sample Midpoint(m)     :   586.95   Sect/Pc #:  1/PCE 1E

ROCK = CPX-PLAG MODERATELY MICROPHYRIC BASALT
       ALTERED,GLASSY;
       Texture: MODERATELY MICROPHYRIC,VARIOLITIC;
       Where sampled: BOTTOM CHILL MARGIN OF SILL*

Phenocrysts- PLAGIOCLASE               (    2%)
             Size(mm):      <0.15  Morphology: EUHEDRAL
             MICROPHENOS,APPROX COMP AN78-65 (ZONED);

             CLINOPYROXENE             (    3%)
             Size(mm):   0.05-0.2  Morphology: EUHEDRAL
             MICROPHENOS,AUGITE*

Groundmass - PLAGIOCLASE               (    5%)
             Size(mm):      <0.03
             SMALL MICROLITES AND CRYSTALLITES;

             CLINOPYROXENE             (    5%)
             Size(mm):     <0.005
             AUGITE?,QUENCH TEXTURED FORM;

             MAGNETITE                 (   10%)
             Size(mm):      <0.02
             TI-MAGN;

             GLASS                     (   75%)
             GLASSY GROUNDMASS MOSTLY REPLACED BY CLAY AND
             CHLORITE*

Alteration - CLAY MINERALS
             Location: GROUNDMASS     Replacing: GROUNDMASS,GLASS,CPX
             PERCENTAGE VARIABLE;

             CHLORITE
             Location: GROUNDMASS     Replacing: GROUNDMASS,GLASS,CPX
             PCT. VARIABLE*




Leg : 61    Top/Bottom Interval(mm): 1230/1250  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   586.00   Rock Type: IGNEOUS
Core:  21   Sample Midpoint(m)     :   587.24   Sect/Pc #:  1/PCE 1I

ROCK = CPX-PLAG MODERATELY PHYRIC BASALT
       ALTERED;
       Texture: MODERATELY PORPHYRITIC,INTERSERTAL;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (    1%)
             Size(mm):    0.3-0.5
             APPROX COMP AN55-65 (OSCILLATORY ZONING);

             CLINOPYROXENE             (    2%)
             Size(mm):    0.5-1.0
             AUGITE,SUBOPHITIC TEXTURE*

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):    0.1-0.3
             APPROX COMP AN60;

             CLINOPYROXENE             (   37%)
             Size(mm):       <0.2  Morphology: SUBHEDRAL-ANHEDRAL
             AUGITE,LIGHT BROWN;

             MAGNETITE                 (    5%)
             Size(mm):      <0.05  Morphology: SUBHEDRAL
             TI-MAGN;

             GLASS                     (   15%)
             ALTERED INTERSTITIAL GLASS PATCHES (ALTERED TO
             GREENISH BROWN CLAY)*

Alteration - CLAY MINERALS             (   10%)
             Replacing: CPX,GLASS
             GREEN-GREENISH BROWN*




Leg : 61    Top/Bottom Interval(mm): 1460/1490  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   586.00   Rock Type: IGNEOUS
Core:  21   Sample Midpoint(m)     :   587.48   Sect/Pc #:  1/PCE 1K

ROCK = CPX MODERATELY MICROPHYRIC BASALT
       ALTERED,FINE GRAINED;
       Texture: MODERATELY MICROPHYRIC,HYALOPILITIC-INTERSERTAL;
       Where sampled: NEAR CHILL MARGIN OF SILL*

Phenocrysts- PLAGIOCLASE               (   TR%)
             Size(mm):        0.1  Morphology: SUBHEDRAL
             ONLY ONE XTL IN SECTION,MICROPHENOS

             CLINOPYROXENE             (    3%)
             Size(mm):    0.1-0.2  Morphology: EUHEDRAL-SUBHEDRAL
             AUGITE,MICROPHENOS*

Groundmass - PLAGIOCLASE               (   39%)
             Size(mm):      <0.03  Morphology: SKELETAL
             MICROLITES;

             CLINOPYROXENE             (   38%)
             Size(mm):      <0.01
             QUENCH XTLS AND SMALL MICROLITES;

             MAGNETITE                 (   10%)
             Size(mm):      <0.01
             TI-MAGN;

             GLASS
             ALL GLASS APPEARS TO BE PLUCKED FROM SECTION (IF
             NOT FOR THIS GLASS WOULD PROBABLY COMPRISE 15% OF
             THE ROCK)*

Alteration - COMBINATION               (   10%)
             Location: VEINS,         Replacing: GROUNDMASS
             Location: GROUNDMASS
             CLAYS + CHLORITE;

             CLAY MINERALS

             CHLORITE




Leg : 61    Top/Bottom Interval(mm):   80/  90  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   586.00   Rock Type: IGNEOUS
Core:  21   Sample Midpoint(m)     :   587.59   Sect/Pc #:  2/PCE 1B

ROCK = CPX-PLAG MODERATELY MICROPHYRIC BASALT
       ALTERED,GLASSY;
       Texture: MODERATELY MICROPHYRIC,VARIOLITIC-HYALOPILITIC;
       Where sampled: GLASSY MARGIN OF SILL*

Phenocrysts- PLAGIOCLASE               (    1%)
             Size(mm):    0.1-0.2  Morphology: EUHEDRAL
             MICROPHENOS,APPROX COMP AN61,ONLY SLIGHTLY ZONED;

             CLINOPYROXENE             (    5%)
             Size(mm):   0.05-0.5  Morphology: EUHEDRAL
             MICROPHENOS,AUGITE*

Groundmass - PLAGIOCLASE               (   10%)
             Size(mm):      <0.03
             MICROLITES AND CRYSTALLITES;

             CLINOPYROXENE             (   10%)
             Size(mm):      <0.02
             QUENCH XTLS AND MICROLITES;

             MAGNETITE                 (    5%)
             Size(mm):      <0.01  Morphology: EUHEDRAL
             TI-MAGN;

             GLASS                     (   69%)
             ALMOST COMPLETELY REPLACED BY CLAY + CHLORITE*

Alteration - COMBINATION
             Replacing: GLASS,PLAG PHENOS,
             Replacing: CPX PHENOS
             CLAYS + CHLORITE ARE REPLACING ALL GLASS AND SOME
             QUENCH PLAG + CPX PHENOS;

             CLAY MINERALS

             CHLORITE




Leg : 61    Top/Bottom Interval(mm):  100/ 110  Describer: Riech, V.
Hole: 462A  Top of Core Depth(m)   :   586.00   Rock Type: SEDIMENTARY
Core:  21   Sample Midpoint(m)     :   587.60   Sect/Pc #:  2/PCE 1D

ROCK = SEDIMENT
       QUARTZIFIED RADIOLARIAN CLAYSTONE,THERE IS A HIGH
       AMOUNT OF REDDISH BROWN TRANSPARENT PIGMENT
       (ORIGIN AND NATURE?--IN CONTACT WITH GLASSY MARGIN
       OF A SILL--BAKED),QUARTZ OCCURS IN THE MATRIX +
       VEINS + RADIOLARIAN MOLDS (RADS ARE TOTALLY
       DISSOLVED BEFORE CHERTIFICATION),ACCESSORY
       COMPONENTS ARE FISH REMAINS AND A GREENISH CLAY
       MIN (CHLORITE?) WHICH SOMETIMES FORMS GREENISH
       INCLUSIONS AND IS CONCENTRATED AROUND FISH
       REMAINS;
       Where sampled: SEDIMENT BETWEEN TWO BASALT SILLS
       BETWEEN UNITS 3 + 4*

Alteration - QUARTZ
             Location: MATRIX,VEINS,
             Location: RAD MOLDS
             RADS ARE TOTALLY DISSOLVED BEFORE CHERTIFICATION;

             CLAY MINERALS
             GREENISH (CHLORITE?),SOMETIMES FORMS GREENISH
             INCLUSIONS AND IS CONCENTRATED AROUND FISH
             REMAINS*




Leg : 61    Top/Bottom Interval(mm):  260/ 290  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   586.00   Rock Type: IGNEOUS
Core:  21   Sample Midpoint(m)     :   587.78   Sect/Pc #:  2/PCE 2

ROCK = CPX-PLAG MODERATELY MICROPHYRIC BASALT
       GLASSY,ALTERED;
       Texture: MODERATELY MICROPHYRIC,HYALOPILITIC;
       Where sampled: NEAR CHILLED MARGIN OF LOWEST SILL IN CORE*

Phenocrysts- PLAGIOCLASE               (    3%)
             Size(mm):  0.15-0.25  Morphology: EUHEDRAL
             APPROX COMP AN55-60;

             CLINOPYROXENE             (    4%)
             Size(mm):    0.2-0.5  Morphology: EUHEDRAL-SUBHEDRAL
             AUGITE,IN GLOMEROPHYRIC CLUSTERS WITH PLAG*

Groundmass - PLAGIOCLASE               (   10%)
             <0.02 LONG,MICROLITES AND CRYSTALLITES;

             CLINOPYROXENE             (   50%)
             Size(mm):     <0.003
             QUENCH XTLS MOSTLY WITH SOME CRYSTALLITES;

             MAGNETITE                 (   12%)
             Size(mm):     <0.008
             TI-MAGN;

             GLASS                     (   21%)
             MOSTLY ALTERED TO CHLORITE + GREEN CLAY*

Alteration - COMBINATION               (   30%)
             Location: GROUNDMASS     Replacing: GROUNDMASS,GLASS,PLAG
             CLAYS (GREEN) + CHLORITE,REPLACING QUENCH XTLS
             AND GLASS;

             CLAY MINERALS             (S    %)

             CHLORITE




Leg : 61    Top/Bottom Interval(mm):  100/ 120  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   588.00   Rock Type: IGNEOUS
Core:  22   Sample Midpoint(m)     :   588.11   Sect/Pc #:  1/PCE 2

ROCK = CPX-PLAG MODERATELY PHYRIC BASALT
       ALTERED;
       Texture: MODERATELY PORPHYRITIC,INTERSERTAL;
       Where sampled: MARGINAL PORTION OF SILL*

Phenocrysts- PLAGIOCLASE               (    3%)
             Size(mm):    0.4-0.6
             APPROX COMP AN63;

             CLINOPYROXENE             (    5%)
             Size(mm):    0.2-0.4
             AUGITE*

Groundmass - PLAGIOCLASE               (   27%)
             Size(mm):    0.1-0.2
             APPROX COMP AN60 ZONED TO AN29;

             CLINOPYROXENE             (   20%)
             Size(mm):       <0.2
             AUGITE;

             MAGNETITE                 (   10%)
             Size(mm):      <0.04

             GLASS                     (   15%)
             INTERSTITIAL PATCHES TOTALLY REPLACED;

             AMPHIBOLE

Alteration - COMBINATION               (   35%)
             GREEN CLAY + CHLORITE + SECONDARY AMPHIBOLE;

             CLAY MINERALS             (S    %)

             AMPHIBOLE

             CHLORITE




Leg : 61    Top/Bottom Interval(mm):  350/ 370  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   588.00   Rock Type: IGNEOUS
Core:  22   Sample Midpoint(m)     :   588.36   Sect/Pc #:  1/PCE 4B

ROCK = CPX-PLAG MODERATELY PHYRIC BASALT
       ALTERED;
       Texture: MODERATELY PORPHYRITIC,INTERSERTAL;
       Where sampled: NEXT TO GLASSY MARGIN OF SILL TOP
       TOP OF SILL*

Phenocrysts- OLIVINE                   (    0%)

             PLAGIOCLASE               (   <1%)
             Morphology: TABULAR
             APPROX COMP AN58;

             CLINOPYROXENE             (    2%)
             AVERAGE SIZE = 0.8 MM*

Groundmass - PLAGIOCLASE
             Morphology: LATHS
             FINE GRAINED MESOSTASIS;

             CLINOPYROXENE
             Morphology: EQUIDIMENSIONAL,

             Morphology: RADIALLY FIBROUS
             FINE GRAINED MESOSTASIS;

             MAGNETITE                 (   12%)
             Morphology: DUST-LIKE

             GLASS                     (   30%)
             MESOSTASIS AND PSEUDOMORPHS*

Alteration - CARBONATE                 (   TR%)

             CLAY MINERALS             (   30%)
             Location: MESOSTASIS     Replacing: GLASS,PYX
             PSEUDOMORPHS*




Leg : 61    Top/Bottom Interval(mm): 1100/1120  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   588.00   Rock Type: IGNEOUS
Core:  22   Sample Midpoint(m)     :   589.11   Sect/Pc #:  1/PCE 4H

ROCK = CPX MODERATELY PHYRIC BASALT
       ALTERED,MORE COARSE GRAINED THAN PREVIOUS THIN
       SECTION;
       Texture: MODERATELY PORPHYRITIC,INTERSERTAL-
       MICRODOLERITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   TR%)
             Morphology: LATHS

             CLINOPYROXENE             (    3%)
             Morphology: EQUIDIMENSIONAL
             AVERAGE SIZE = 1.2 MM,INCLUDE PLAG LATHS WITHIN*

Groundmass - PLAGIOCLASE               (   47%)
             AVERAGE DIMENSIONS = 0.02 X 0.6 MM,APPROX COMP
             AN60,MICROLITES;

             CLINOPYROXENE             (   20%)
             Morphology: EQUIDIMENSIONAL
             AVERAGE SIZE = 0.06 MM;

             MAGNETITE                 (   10%)
             AVERAGE SIZE = 0.05,INTERSTITIAL;

             GLASS                     (   20%)
             INTERSTITIAL,ALTERED TO DARK CLAY*

Alteration - CLAY MINERALS             (   20%)
             Location: INTERSTITIAL   Replacing: GLASS
             DARK IN COLOR*




Leg : 61    Top/Bottom Interval(mm): 1380/1410  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   588.00   Rock Type: IGNEOUS
Core:  22   Sample Midpoint(m)     :   589.40   Sect/Pc #:  1/PCE 4I

ROCK = APHYRIC BASALT
       HEAVILY ALTERED,MORE FINE GRAINED THAN PREVIOUS
       THIN SECTION;
       Texture: APHYRIC,INTERSERTAL;
       Where sampled: CHILLED MARGIN OF SILL
       BOTTOM OF SILL*

Phenocrysts- CLINOPYROXENE             (   TR%)

Groundmass - PLAGIOCLASE
             PERCENT UNKNOWN,ALTERED;

             CLINOPYROXENE
             PERCENT UNKNOWN,ALTERED;

             MAGNETITE                 (    7%)

             GLASS
             ALTERED*

Alteration - CLAY MINERALS             (   85%)
             Location: ENTIRE ROCK    Replacing: ALL.MINS,GLASS




Leg : 61    Top/Bottom Interval(mm): 1120/1140  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   588.00   Rock Type: IGNEOUS
Core:  22   Sample Midpoint(m)     :   590.63   Sect/Pc #:  2/PCE 1

ROCK = APHYRIC BASALT
       ALTERED,CONTACT OF HYALOPILITIC AND INTERSERTAL
       BASALTS;
       Texture: APHYRIC,HYALOPILITIC,INTERSERTAL;
       Where sampled: GLASSY MARGIN OF SILL*

Phenocrysts- COMBINATION               (   TR%)
             Size(mm):        1.6
             INCLUDES PLAG+CPX GLOMEROPORPHYRITIC INTERGROWTHS*

Groundmass - PLAGIOCLASE
             HEAVILY ALTERED TO DARK GRAY CHLORITE + CLAY;

             CLINOPYROXENE
             HEAVILY ALTERED TO DARK GRAY CHLORITE + CLAY;

             MAGNETITE
             HEAVILY ALTERED TO DARK GRAY CHLORITE + CLAY;

             GLASS
             HEAVILY ALTERED TO DARK GRAY CHLORITE + CLAY*

Alteration - COMBINATION
             Location: GROUNDMASS     Replacing: GROUNDMASS,ALL.MINS
             DARK GRAY CHLORITE + CLAY;

             CLAY MINERALS

             CHLORITE




Leg : 61    Top/Bottom Interval(mm): 1350/1370  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   588.00   Rock Type: IGNEOUS
Core:  22   Sample Midpoint(m)     :   590.86   Sect/Pc #:  2/PCE 2A

ROCK = APHYRIC BASALT
       SLIGHTLY ALTERED,MORE COARSE GRAINED THAN
       PREVIOUS THIN SECTION;
       Texture: APHYRIC,INTERSERTAL-MICRDOLERITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   TR%)

             CLINOPYROXENE             (   TR%)

Groundmass - PLAGIOCLASE               (   55%)
             Morphology: ELONGATE PRISMS
             AVERAGE DIMENSIONS = 0.04 X 0.5 MM,APPROX COMP
             AN54-78,ZONATED,MICROLITES;

             CLINOPYROXENE             (   20%)
             Morphology: EQUIDIMENSIONAL
             AVERAGE SIZE = 0.3 MM;

             MAGNETITE                 (    8%)
             Morphology: INTERGRANULAR,DUST-LIKE
             AVERAGE SIZE = 0.04 MM;

             GLASS                     (   17%)
             INTERSTITIAL*

Alteration - CLAY MINERALS             (   17%)
             Location: INTERGRANULAR  Replacing: GLASS

             CLAY MINERALS             (   20%)
             Location: INTERSTITIAL   Replacing: GLASS
             DARK GRAY*
             DARK BROWN*




Leg : 61    Top/Bottom Interval(mm):  610/ 680  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   588.00   Rock Type: IGNEOUS
Core:  22   Sample Midpoint(m)     :   591.65   Sect/Pc #:  3/PCE 1F

ROCK = APHYRIC BASALT
       SLIGHTLY MORE COARSE GRAINED THAN PREVIOUS THIN
       SECTION BUT ALSO MORE RICH IN GLASS;
       Texture: APHYRIC,INTERSERTAL-MICRODOLERITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   TR%)

             CLINOPYROXENE             (   TR%)

Groundmass - PLAGIOCLASE               (   32%)
             Morphology: ELONGATE PRISMS,MICROLITIC
             AVERAGE DIMENSIONS = 0.08 X 0.5,ZONED,APPROX
             COMP AN40-77,MICROLITES;

             CLINOPYROXENE             (   40%)
             Morphology: EQUIDIMENSIONAL
             AVERAGE SIZE;

             MAGNETITE                 (    8%)
             Morphology: INTERGRANULAR

             GLASS                     (   20%)
             INTERSTITIAL,ALTERED TO CLAY*

Alteration - CLAY MINERALS             (   20%)
             Location: INTERSTITIAL   Replacing: GLASS
             DARK BROWN*




Leg : 61    Top/Bottom Interval(mm):  810/ 840  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   588.00   Rock Type: IGNEOUS
Core:  22   Sample Midpoint(m)     :   593.33   Sect/Pc #:  4/PCE 1C

ROCK = MICRODOLERITE
       MORE COARSE GRAINED THAN PREVIOUS THIN SECTION,
       ENRICHED IN PYROXENE;
       Texture: MICRODOLERITIC-INTERSERTAL;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   TR%)

             CLINOPYROXENE             (   TR%)

Groundmass - OLIVINE                   (    0%)

             PLAGIOCLASE               (   28%)
             Morphology: ELONGATE PRISMS
             AVERAGE DIMENSIONS = 0.08 X 0.9 MM,APPROX COMP
             AN52-71,MICROLITES;

             CLINOPYROXENE             (   49%)
             Morphology: EQUIDIMENSIONAL
             AVERAGE SIZE = 0.4 MM;

             MAGNETITE                 (    8%)
             AVERAGE SIZE = 0.12 MM,INTERSTITIAL;

             GLASS                     (   15%)
             INTERSTITIAL,ALTERED TO DARK BROWN CLAY*

Alteration - CLAY MINERALS             (   15%)
             Location: INTERSTITIAL   Replacing: GLASS
             DARK BROWN*




Leg : 61    Top/Bottom Interval(mm):  810/ 850  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   588.00   Rock Type: IGNEOUS
Core:  22   Sample Midpoint(m)     :   594.83   Sect/Pc #:  5/PCE 1E

ROCK = MICRODOLERITE
       MORE CRYSTALLINE AND COARSE GRAINED THAN PREVIOUS
       THIN SECTION;
       Texture: MICRODOLERITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   TR%)
             Size(mm):          2

Groundmass - PLAGIOCLASE               (   32%)
             Morphology: ELONGATE PRISMS
             AVERAGE DIMENSIONS = 0.06 X 0.4 MM,ZONED,APPROX
             COMP AN52-67,MICROLITES;

             CLINOPYROXENE             (   60%)
             Morphology: EQUIDIMENSIONAL
             AVERAGE SIZE 0.1;

             MAGNETITE                 (    8%)
             Morphology: IRREGULAR
             AVERAGE SIZE 0.1,INTERSTITIAL;

             GLASS                     (    0%)

Alteration - CLAY MINERALS             (   12%)
             Replacing: PYX
             DARK BROWN PSEUDOMORPHS*




Leg : 61    Top/Bottom Interval(mm):  190/ 210  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   597.00   Rock Type: IGNEOUS
Core:  23   Sample Midpoint(m)     :   597.20   Sect/Pc #:  1/PCE 1A

ROCK = CPX-PLAG MODERATELY MICROPHYRIC BASALT;
       Texture: MODERATELY MICROPHYRIC,HYALOPILITIC;
       Where sampled: CONTACT BETWEEN SEDIMENT AND BASALT SILL*

Phenocrysts- PLAGIOCLASE               (    1%)
             Size(mm):    0.3-0.5
             APPROX COMP AN60-65,MICROPHENOS;

             CLINOPYROXENE             (    5%)
             Size(mm):    0.3-0.4  Morphology: SUBHEDRAL-EUHEDRAL
             REPLACED BY CALCITE (PSEUDOMORPHS),MICROPHENOS*

Groundmass - PLAGIOCLASE               (  5-6%)
             Size(mm):       <0.1
             ALTERED TO CLAY + CHLORITE;

             CLINOPYROXENE             (  5-6%)
             Size(mm):       <0.1
             ALTERED TO CLAY + CHLORITE;

             MAGNETITE                 (    8%)
             Size(mm):       0.01  Morphology: ANGULAR
             MOST OF IT IS SECONDARY;

             GLASS                     (   75%)
             ALTERED TO CHLORITE*

Alteration - CARBONATE                 (   15%)
             Location: VEIN,CLOT      Replacing: CPX PHENOS
             CPX PHENOS REPLACED BY CALCITE;

             COMBINATION               (   45%)
             Location: MESOSTASIS     Replacing: GLASS,PLAG,CPX
             INCLUDES CLAY.MINS+CHLORITE;

             QUARTZ                    (   <1%)
             Replacing: GLASS

             MAGNETITE                 (   <8%)
             8% TOTAL MAGN OF WHICH MOST IS SECONDARY*




Leg : 61    Top/Bottom Interval(mm):  690/ 710  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   597.00   Rock Type: IGNEOUS
Core:  23   Sample Midpoint(m)     :   599.20   Sect/Pc #:  2/PCE 1C

ROCK = CPX-PLAG SPARSELY PHYRIC BASALT
       MASSIVE;
       Texture: SPARSELY PORPHYRITIC,INTERSERTAL-HYALOPILITIC;
       Where sampled: NEXT TO GLASSY MARGIN*

Phenocrysts- PLAGIOCLASE               (  0.1%)
             Size(mm):        1.8  Morphology: SUBHEDRAL
             APPROX COMP AN65;

             CLINOPYROXENE             (  1-2%)
             Size(mm):    0.4-0.8  Morphology: SUBHEDRAL-EUHEDRAL

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):       <0.4  Morphology: SUBHEDRAL-EUHEDRAL
             MICROLITIC;

             CLINOPYROXENE             (   38%)
             Size(mm):       <0.1  Morphology: SUBHEDRAL
             MICROLITIC;

             MAGNETITE                 (    5%)
             Size(mm):      <0.05  Morphology: ANGULAR

             GLASS                     (   15%)
             MESOSTASIS*

Alteration - CLAY MINERALS             (   40%)
             Replacing: PLAG,CPX,GLASS
             REPLACING MICROLITES OF PLAG + CPX*




Leg : 61    Top/Bottom Interval(mm):  950/ 980  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   597.00   Rock Type: IGNEOUS
Core:  23   Sample Midpoint(m)     :   599.47   Sect/Pc #:  2/PCE 2A

ROCK = CPX-PLAG MODERATELY MICROPHYRIC BASALT
       BASALT SILL;
       Texture: MODERATELY MICROPHYRIC,HYALOPILITIC;
       Where sampled: NEXT TO GLASSY MARGIN*

Phenocrysts- PLAGIOCLASE               (    1%)
             Size(mm):    0.3-0.4  Morphology: SUBHEDRAL
             APPROX COMP AN65,MICROPHENOS;

             CLINOPYROXENE             (    3%)
             Size(mm):    0.3-0.4  Morphology: EUHEDRAL-SUBHEDRAL
             FORMS A SUBOPHITIC TEXTURE IN SOME AREAS,
             MICROPHENOS*

Groundmass - PLAGIOCLASE               (   30%)
             Size(mm):       <0.2  Morphology: SUBHEDRAL
             PARTLY MICROLITIC;

             CLINOPYROXENE             (   35%)
             Size(mm):       <0.1  Morphology: SUBHEDRAL
             PARTLY MICROLITIC;

             MAGNETITE                 (    6%)
             Size(mm):      <0.05  Morphology: ANGULAR

             GLASS                     (   15%)
             MOSTLY ALTERED TO CLAY MINS*

Alteration - CLAY MINERALS             (35-40%)
             Location: GROUNDMASS     Replacing: CPX,GLASS




Leg : 61    Top/Bottom Interval(mm):  750/ 770  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   597.00   Rock Type: IGNEOUS
Core:  23   Sample Midpoint(m)     :   600.76   Sect/Pc #:  3/PCE 5

ROCK = DOLERITE;
       Texture: SUBOPHITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (  4-5%)
             Size(mm):    0.4-0.5  Morphology: SUBHEDRAL-EUHEDRAL
             APPROX COMP AN65,MICROPHENOS;

             CLINOPYROXENE             (  3-4%)
             Size(mm):    0.4-0.8  Morphology: SUBHEDRAL-EUHEDRAL
             MICROPHENOS*

Groundmass - PLAGIOCLASE
             Size(mm):       <0.3  Morphology: SUBHEDRAL
             MICROLITIC;

             CLINOPYROXENE
             Size(mm):       <0.3  Morphology: SUBHEDRAL
             MICROLITIC;

             MAGNETITE
             Size(mm):       <0.1  Morphology: ANGULAR

             APATITE
             Morphology: ACICULAR
             IN CPX AND PLAG*

Alteration - COMBINATION               (   35%)
             Replacing: CPX,PLAG,CPX PHENOS
             SMEC + CHLORITE,PHENOS AND MICROLITES OF CPX ARE
             OFTEN ALTERED,PLAG PARTLY ALTERED,

             CHLORITE

             SMECTITE




Leg : 61    Top/Bottom Interval(mm):   80/ 100  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   606.00   Rock Type: IGNEOUS
Core:  24   Sample Midpoint(m)     :   606.09   Sect/Pc #:  1/PCE 2A

ROCK = DOLERITE;
       Texture: INTERGRANULAR-SUBOPHITIC;
       Where sampled: SILL INTERIOR*
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (  5-6%)
             Size(mm):    0.4-0.9  Morphology: SUBHEDRAL

             PLAGIOCLASE               (  5-6%)
             Size(mm):    0.4-0.9  Morphology: SUBHEDRAL
             APPROX COMP AN60,PHENOS AND MICROPHENOS;

             CLINOPYROXENE             (  3-4%)
             Size(mm):    0.3-0.4  Morphology: SUBHEDRAL-EUHEDRAL
             MICROPHENOS*

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):       <0.3  Morphology: EUHEDRAL-SUBHEDRAL
             MICROLITIC;

             CLINOPYROXENE             (   45%)
             Size(mm):       <0.2  Morphology: SUBHEDRAL
             MICROLITIC;

             MAGNETITE                 (  3-5%)
             Size(mm):       <0.1  Morphology: ANGULAR

             QUARTZ                    (   TR%)

             ALKALI FELDSPAR           (   TR%)

Alteration - CLAY MINERALS             (   35%)
             Replacing: CPX MICROPHENOS,PLAG,CPX
             REPLACING MICROPHENOS OF CPX,MICROLITES OF
             PLAG + CPX ARE OFTEN ALTERED*




Leg : 61    Top/Bottom Interval(mm):  270/ 310  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   606.00   Rock Type: IGNEOUS
Core:  24   Sample Midpoint(m)     :   606.29   Sect/Pc #:  1/PCE 2C

ROCK = DOLERITE;
       Texture: SUBOPHITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (  6-8%)
             Size(mm):    0.4-1.5  Morphology: SUBHEDRAL-EUHEDRAL
             APPROX COMP AN65 (AN80-25?),PHENOS AND
             MICROPHENOS;

             CLINOPYROXENE             (  6-8%)
             Size(mm):    0.3-0.4  Morphology: SUBHEDRAL-EUHEDRAL
             OFTEN FORMS AGGREGATES (GLOMEROPORPHYRITIC)*

Groundmass - PLAGIOCLASE               (   38%)
             Size(mm):       <0.3  Morphology: SUBHEDRAL-EUHEDRAL
             MICROLITIC TO GROUNDMASS;

             CLINOPYROXENE             (   37%)
             Size(mm):       <0.3  Morphology: SUBHEDRAL
             MICROLITIC TO GROUNDMASS;

             MAGNETITE                 (   10%)
             Size(mm):       <0.1  Morphology: ANGULAR

             GLASS
             FRESH;

             QUARTZ                    (   TR%)

             ALKALI FELDSPAR           (   TR%)

Alteration - CLAY MINERALS             (20-30%)
             Replacing: CPX,PLAG
             ALTERED MICROLITES OF CPX + PLAG*




Leg : 61    Top/Bottom Interval(mm):  510/ 540  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   606.00   Rock Type: IGNEOUS
Core:  24   Sample Midpoint(m)     :   611.03   Sect/Pc #:  4/PCE 4

ROCK = DOLERITE;
       Texture: SUBOPHITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (    3%)
             Size(mm):    0.6-1.2  Morphology: SUBHEDRAL-EUHEDRAL
             PHENOS + MICROPHENOS,APPROX COMP AN60-65;

             CLINOPYROXENE             (  5-6%)
             Size(mm):        0.4  Morphology: SUBHEDRAL-EUHEDRAL
             FORMS AGGREGATES IN SOME CASES,MICROPHENOS*

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):       <0.3  Morphology: SUBHEDRAL-EUHEDRAL
             MICROLITIC TO GROUNDMASS;

             CLINOPYROXENE             (   40%)
             Size(mm):       <0.2  Morphology: SUBHEDRAL
             MICROLITIC TO GROUNDMASS;

             MAGNETITE                 (   10%)
             Size(mm):       <0.1  Morphology: ANGULAR

Alteration - CLAY MINERALS             (   20%)
             Replacing: CPX,PLAG
             ALTERED MICROLITES OF PLAG + CPX*




Leg : 61    Top/Bottom Interval(mm):  390/ 420  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   615.00   Rock Type: IGNEOUS
Core:  25   Sample Midpoint(m)     :   615.41   Sect/Pc #:  1/PCE 5

ROCK = DOLERITE
       VERY ALTERED;
       Texture: SUBOPHITIC (DIABASIC);
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   <1%)
             Size(mm):    0.2-0.6  Morphology: EUHEDRAL-SUBHEDRAL
             MICROPHENOS,TWINNED,APPROX COMP AN60;

             CLINOPYROXENE             (   <1%)
             Size(mm):    0.3-0.5  Morphology: SUBHEDRAL
             MICROPHENOS,AUGITE;

Groundmass - PLAGIOCLASE               (   35%)
             Size(mm):    0.1-0.2  Morphology: SUBHEDRAL-EUHEDRAL
             APPROX COMP AN60;

             CLINOPYROXENE             (   15%)
             Size(mm):    0.1-0.2
             AUGITE;

             MAGNETITE                 (    5%)
             Size(mm):       <0.2  Morphology: SKELETAL,SUBHEDRAL
             TI-MAGN;

             GLASS                     (10-15%)
             ALTERED INTERSTITIAL PATCHES OF GLASS;

             QUARTZ                    (   TR%)
             IN INTERSTITIAL GLASS PATCHES;

             AMPHIBOLE                 (   15%)
             RIMMING CPX*

Alteration - CLAY MINERALS             (   15%)
             Replacing: CPX,PLAG
             GREEN;

             CHLORITE                  (   15%)
             Replacing: CPX,PLAG




Leg : 61    Top/Bottom Interval(mm):  390/ 420  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   615.00   Rock Type: IGNEOUS
Core:  25   Sample Midpoint(m)     :   615.41   Sect/Pc #:  1/PCE 5

ROCK = DOLERITE;
       Texture: INTERSERTAL-INTERGRANULAR;
       Where sampled: NEXT TO GLASSY MARGIN*

Phenocrysts- PLAGIOCLASE               (    3%)
             Size(mm):    0.4-0.7  Morphology: SUBHEDRAL
             MICROPHENOS,APPROX COMP AN60;

             CLINOPYROXENE             (    3%)
             Size(mm):    0.2-0.5  Morphology: SUBHEDRAL
             MICROPHENOS,OFTEN FORMS AGGREGATES*

Groundmass - PLAGIOCLASE               (   50%)
             Size(mm):       <0.2  Morphology: SUBHEDRAL-EUHEDRAL
             MICROLITIC;

             CLINOPYROXENE             (   35%)
             Size(mm):       <0.2  Morphology: SUBHEDRAL
             MICROLITIC;

             MAGNETITE                 (  3-5%)
             Size(mm):      <0.08  Morphology: ANGULAR

             GLASS                     (    5%)
             ALTERED TO A CLAY MIN*

Alteration - COMBINATION               (   40%)
             Replacing: PLAG,CPX,GLASS
             CLAY + CHLORITE REPLACE MICROLITES OF PLAG + CPX
             AND GLASS;

             CLAY MINERALS

             CHLORITE




Leg : 61    Top/Bottom Interval(mm):  990/1020  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   615.00   Rock Type: IGNEOUS
Core:  25   Sample Midpoint(m)     :   616.01   Sect/Pc #:  1/PCE 9

ROCK = DOLERITE
       ALTERED;
       Texture: MICRODOLERITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   <1%)

             CLINOPYROXENE             (   <1%)
             Size(mm):    0.4-0.5

Groundmass - PLAGIOCLASE               (   20%)
             Size(mm):    0.1-0.2  Morphology: SUBHEDRAL
             APPROX COMP AN62;

             CLINOPYROXENE             (   35%)
             Size(mm):  0.05-0.15
             AUGITE;

             MAGNETITE                 (   10%)
             PERCENTAGE IS DIFFICULT TO DETERMINE BECAUSE THE
             THIN SECTION IS TOO THICK;

             GLASS                     (   10%)
             ALTERED INTERSTITIAL PATCHES*

Alteration - COMBINATION               (   25%)
             DARK ALTERATION PRODUCTS ARE NOT DIFFERENTIABLE
             DUE TO THE THICKNESS OF THIS SECTION*




Leg : 61    Top/Bottom Interval(mm):  990/1020  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   615.00   Rock Type: IGNEOUS
Core:  25   Sample Midpoint(m)     :   616.01   Sect/Pc #:  1/PCE 9

ROCK = DOLERITE;
       Texture: INTERSERTAL-INTERGRANULAR;
       Where sampled: NEXT TO GLASSY MARGIN*

Phenocrysts- PLAGIOCLASE               (    1%)
             Size(mm):    0.5-0.6  Morphology: SUBHEDRAL
             PARTLY SUBOPHITIC,APPROX COMP AN70;

             CLINOPYROXENE             (    3%)
             Size(mm):    0.5-0.6  Morphology: SUBHEDRAL
             PARTLY SUBOPHITIC*

Groundmass - PLAGIOCLASE               (   45%)
             Size(mm):       <0.4  Morphology: SUBHEDRAL-EUHEDRAL
             PARTLY MICROLITIC;

             CLINOPYROXENE             (   48%)
             Size(mm):       <0.3  Morphology: SUBHEDRAL
             PARTLY MICROLITIC;

             MAGNETITE                 (    2%)
             Size(mm):      <0.05  Morphology: ANGULAR

Alteration - CLAY MINERALS             (   25%)
             Location: SPOTS          Replacing: CPX




Leg : 61    Top/Bottom Interval(mm):  310/ 330  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   626.00   Rock Type: IGNEOUS
Core:  27   Sample Midpoint(m)     :   626.32   Sect/Pc #:  1/PCE 2

ROCK = DOLERITE
       ALTERED WITH GRANOPHYRIC PATCHES;
       Texture: DIABASIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- CLINOPYROXENE             (   TR%)
             Size(mm):     TO 0.5
             AUGITE*

Groundmass - PLAGIOCLASE               (   25%)
             Size(mm):    0.1-0.3
             APPROX COMP AN58 ZONED TO AN2(;

             CLINOPYROXENE             (   15%)
             Size(mm):       <0.2
             AUGITE;

             MAGNETITE                 (   10%)
             Size(mm):       <0.2  Morphology: SUBHEDRAL
             TI-MAGN;

             COMBINATION               (  2-3%)
             INCLUDES ALKALI FELDSPAR + QUARTZ GRANOPHYRIC
             INTERGROWTHS;

             AMPHIBOLE                 (   15%)
             NEEDLES + PATCHES,ACTINOLITE? + HBL;

             QUARTZ
             Morphology: CRYSTALLINE,SUBHEDRAL

Alteration - CLAY MINERALS             (   20%)
             GREEN;

             CHLORITE                  (   15%)
             Replacing: PLAG




Leg : 61    Top/Bottom Interval(mm):  970/1000  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   626.00   Rock Type: IGNEOUS
Core:  27   Sample Midpoint(m)     :   626.99   Sect/Pc #:  1/PCE 8

ROCK = DOLERITE
       ALTERED,COARSE GRAINED WITH GRANOPHYRES;
       Texture: DIABASIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- CLINOPYROXENE             (   <1%)
             Size(mm):    0.6-0.7  Morphology: SUBHEDRAL
             AUGITE*

Groundmass - PLAGIOCLASE               (   23%)
             Size(mm):    0.2-0.5
             APPROX COMP AN87 CORES WITH RIMS OF AN35;

             CLINOPYROXENE             (   35%)
             Size(mm):    0.4-0.5
             AUGITE;

             MAGNETITE                 (    7%)
             Size(mm):       <0.2  Morphology: EUHEDRAL-SUBHEDRAL
             TI-MAGN;

             COMBINATION               (  2-3%)
             INCLUDES QUARTZ + ALKALI FELDSPAR GRANOPHYRES;

             AMPHIBOLE
             ACTINOLITE? (NON-PLEOCHROIC) + HBL (GAMMA= DARK
             BROWN--ALPHA= CLEAR--BETA= LIGHT BROWN--GAMMA TO
             Z= 0 DEGREES)*

Alteration - COMBINATION               (   35%)
             Location: PATCHES
             INCLUDES AMPH + CHLORITE + BROWN CLAY IN PATCHES
             AND DISTRIBUTED THROUGH ROCK,AMPH RIMMED WITH
             CHLORITE*




Leg : 61    Top/Bottom Interval(mm):  770/ 800  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   626.00   Rock Type: IGNEOUS
Core:  27   Sample Midpoint(m)     :   628.28   Sect/Pc #:  2/PCE 6

ROCK = DOLERITE
       ALTERED,GRANOPHYRIC;
       Texture: DIABASIC,COARSE GRAINED;
       Where sampled: SILL INTERIOR*

Groundmass - PLAGIOCLASE               (   25%)
             Size(mm):    0.2-0.9
             APPROX COMP AN70 ZONED TO AN40;

             CLINOPYROXENE             (   33%)
             Size(mm):    0.2-0.8
             AUGITE;

             MAGNETITE                 (   12%)
             Size(mm):     TO 0.2
             TI-MAGN;

             COMBINATION               (  1-2%)
             INCLUDES QUARTZ + ALK.SPAR GRANOPHYRIC PATCHES;

             APATITE                   (   TR%)

Alteration - COMBINATION               (   30%)
             Location: PATCHES
             INCLUDES BROWN CLAY + AMPH*




Leg : 61    Top/Bottom Interval(mm): 1250/1280  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   626.00   Rock Type: IGNEOUS
Core:  27   Sample Midpoint(m)     :   628.77   Sect/Pc #:  2/PCE 9

ROCK = DOLERITE
       GRANOPHYRIC;
       Texture: DIABASIC;
       Where sampled: SILL INTERIOR*

Groundmass - PLAGIOCLASE               (   30%)
             Size(mm):    0.1-0.6  Morphology: SUBHEDRAL-EUHEDRAL
             COMPLEX TWINS,APPROX COMP AN50-AN30;

             CLINOPYROXENE             (   37%)
             Size(mm):    0.2-0.5
             AUGITE,PALE BROWN;

             MAGNETITE                 (   10%)
             Size(mm):       <0.3  Morphology: EUHEDRAL-ANHEDRAL
             TI-MAGN;

             COMBINATION               (    3%)
             INCLUDES QUARTZ + ALKALI FELDSPAR GRANOPHYRIC
             AGGREGATES*

Alteration - COMBINATION               (   20%)
             INCLUDES BROWN CLAY + AMPH*




Leg : 61    Top/Bottom Interval(mm): 1250/1280  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   626.00   Rock Type: IGNEOUS
Core:  27   Sample Midpoint(m)     :   628.77   Sect/Pc #:  2/PCE 9

ROCK = MICRODOLERITE;
       Texture: SPOTTED MICRDOLERITIC-DOLERITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (    1%)
             AVERAGE DIMENSIONS= 0.4X1.0 MM,APPROX COMP
             AN52-70 (SOME GRAINS SHOW ZONING AN70-28),
             GLOMEROPORPHRYTIC AGGREGATES WITH CPX;

             CLINOPYROXENE             (    2%)
             AVERAGE SIZE= 0.8,GLOMEROPORPHYRITIC AGGREGATES*

Groundmass - PLAGIOCLASE               (   25%)
             AVERAGE LENGTH= 0.1-0.6 MM,AVERAGE COMP AN62,
             MICROLITES,GRAIN SIZE LIMITS FOR MICRODOLERITIC
             AND DOLERITIC TEXTURES ARE ACCEPTABLE;

             CLINOPYROXENE             (   64%)
             Size(mm):   0.02-0.3  Morphology: EQUIDIMENSIONAL

             MAGNETITE                 (    8%)
             AVERAGE SIZE= 0.2,INTERGRANULAR;

             GLASS
             HOLOCRYSTALLINE;

             QUARTZ                    (   TR%)
             Size(mm):    0.2-0.4
             INTERGRANULAR AND IN GRANOPHYRIC AGGREGATES;

             ALKALI FELDSPAR           (   TR%)
             Size(mm):        0.1
             GRANOPHYRIC NUCLEARS;

             APATITE                   (   TR%)
             Morphology: ACICULAR
             NEEDLES IN QUARTZ*

Alteration - CLAY MINERALS             (   15%)
             Location: INTERGRANULAR  Replacing: ALL.MINS
             DARK BROWN*




Leg : 61    Top/Bottom Interval(mm):  710/ 740  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   626.00   Rock Type: IGNEOUS
Core:  27   Sample Midpoint(m)     :   629.73   Sect/Pc #:  3/PCE 3

ROCK = MICRODOLERITE
       GRAIN SIZE AND TEXTURE THE SAME AS IN PREVIOUS
       THIN SECTION;
       Texture: MICRODOLERITIC-DOLERITIC;
       Where sampled: SILL INTERIOR

Phenocrysts- PLAGIOCLASE               (   TR%)
             Morphology: ELONGATE PRISMS,TABULAR
             AVERAGE LENGTH= 1.0,APPROX COMP AN52-70,SLIGHTLY
             CORRODED;

             CLINOPYROXENE             (    1%)
             Morphology: EQUIDIMENSIONAL
             SLIGHTLY CORRODED*

Groundmass - PLAGIOCLASE               (   30%)
             AVERAGE LENGTH= 0.1-0.6,AVERAGE COMP AN62,
             MICROLITES,GRAIN SIZE LIMITS FOR MICRODOLERITIC
             AND DOLERITIC TEXTURES ARE ACCEPTABLE;

             CLINOPYROXENE             (   61%)
             Size(mm):   0.02-0.3  Morphology: EQUIDIMENSIONAL

             MAGNETITE                 (    8%)
             AVERAGE SIZE= 0.2,INTERGRANULAR;

             GLASS
             HOLOCRYSTALLINE;

             COMBINATION               (   TR%)
             Size(mm):    0.1-0.4
             INCLUDES QUARTZ + ALKALI FELDSPAR INTERGRANULAR
             GRANOPHYRIC AGGREGATES;

             APATITE                   (   TR%)
             Morphology: ACICULAR
             THIN NEEDLES IN QUARTZ*

Alteration - CLAY MINERALS             (   20%)
             Location: INTERGRANULAR  Replacing: ALL.MINS
             PSEUDOMORPHS,PALE GRAYISH GREEN*




Leg : 61    Top/Bottom Interval(mm): 1330/1360  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   626.00   Rock Type: IGNEOUS
Core:  27   Sample Midpoint(m)     :   630.35   Sect/Pc #:  3/PCE 6

ROCK = MICRODOLERITE
       ALL THE SAME AS IN PREVIOUS THIN SECTION,
       SUBPARALLEL PYROXENE AND MAGNETITE GRAIN CHAINS
       APPEAR;
       Texture: MICRODOLERITIC-DOLERITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   TR%)
             Morphology: TABULAR
             AVERAGE SIZE= 1.6,COARSE ZONAEDGRAINS;

             CLINOPYROXENE             (   TR%)
             Morphology: EQUIDIMENSIONAL
             AVERAGE SIZE= 1.6*

Groundmass - PLAGIOCLASE               (30-45%)
             AVERAGE LENGTH= 0.4 MM,AVERAGE COMP AN62,
             MICROLITES;

             CLINOPYROXENE             (43-58%)
             Morphology: EQUIDIMENSIONAL
             AVERAGE SIZE= 0.02-0.3 MM;

             MAGNETITE                 (   12%)
             AVERAGE SIZE= 0.2,INTERGRANULAR;

             QUARTZ                    (   TR%)
             Size(mm):    0.1-0.3
             INTERGRANULAR ISOLATED GRAINS AND GRANOPHYRIC
             AGGREGATES;

             ALKALI FELDSPAR           (   TR%)
             Size(mm):        0.1
             INTERGRANULAR ISOLATED GRAINS AND GRANOPHYRIC
             AGGREGATES;

             APATITE                   (   TR%)
             Size(mm):      <0.02  Morphology: ACICULAR
             NEEDLES IN QUARTZ*

Alteration - CLAY MINERALS             (   20%)
             Location: INTERGRANULAR  Replacing: PLAG
             PSEUDOMORPHS,PRESUMABLY REPLACING PLAG,PALE
             GRAYISH GREEN*




Leg : 61    Top/Bottom Interval(mm):  960/ 980  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   630.00   Rock Type: IGNEOUS
Core:  28   Sample Midpoint(m)     :   630.97   Sect/Pc #:  1/PCE 4

ROCK = DOLERITE
       MORE COARSE GRAINED THAN PREVIOUS THIN SECTION
       AND MORE LEUCOCRATIC;
       Texture: DOLERITIC-MICRODOLERITIC*

Groundmass - PLAGIOCLASE               (35-45%)
             AVERAGE LENGTH= 0.2-0.6 MM,APPROX COMP AN43-63,
             MICROLITES;

             CLINOPYROXENE             (43-53%)
             Morphology: EQUIDIMENSIONAL

             MAGNETITE                 (   10%)
             AVERAGE SIZE= 0.6,INTERGRANULAR;

             GLASS
             HOLOCRYSTALLINE ROCK;

             COMBINATION               (    2%)
             Size(mm):    0.4-0.8
             INCLUDES QUARTZ + ALK.SPAR GRANOPHYRIC
             INTERGROWTHS;

             APATITE                   (   TR%)
             Morphology: ACICULAR
             THIN NEEDLES IN QUARTZ*

Alteration - CLAY MINERALS             (   12%)
             Replacing: PYX
             PSEUDOMORPHS,DARK BROWN*




Leg : 61    Top/Bottom Interval(mm):  280/ 300  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   630.00   Rock Type: IGNEOUS
Core:  28   Sample Midpoint(m)     :   631.79   Sect/Pc #:  2/PCE 1B

ROCK = MICRODOLERITE
       SLIGHTLY MORE FINE GRAINED THAN PREVIOUS THIN
       SECTION,INTERSTITIAL VARIOLITIC AGGREGATES;
       Texture: SPOTTED MICRODOLERITIC-DOLERITIC;
       Where sampled: SILL INTERIOR*

Groundmass - PLAGIOCLASE               (   45%)
             Morphology: PRISMS
             AVERAGE LENGTH= 0.1-0.8,APPROX COMP AN60-80,
             MICROLITES;

             CLINOPYROXENE             (   33%)
             Morphology: EQUIDIMENSIONAL
             AVERAGE SIZE= 0.08-0.4 MM;

             MAGNETITE                 (    7%)
             Size(mm):   0.04-0.4
             INTERGRANULAR;

             GLASS                     (   15%)
             AVERAGE SIZE= 0.4 MM,INTERSTITIAL VARIOLITIC
             AGGREGATES;

             QUARTZ                    (   TR%)
             Size(mm):        0.1
             INTERSTITIAL*

Alteration - CLAY MINERALS             (   20%)
             Location: INTERSTITIAL   Replacing: GLASS
             BROWN PSEUDOMORPHS*




Leg : 61    Top/Bottom Interval(mm):  730/ 750  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   630.00   Rock Type: IGNEOUS
Core:  28   Sample Midpoint(m)     :   632.24   Sect/Pc #:  2/PCE 2B

ROCK = DOLERITE
       MORE COARSE GRAINED THAN PREVIOUS THIN SECTION
       AND MORE CRYSTALLIZED,VARIOLITIC,INTERSTITIAL;
       Texture: SPOTTED DOLERITIC-VARIOLITIC;
       Where sampled: SILL INTERIOR*

Groundmass - PLAGIOCLASE               (   38%)
             Morphology: ELONGATE PRISMS,TABULAR
             LENGTH= 0.6-4 MM,APPROX COMP AN52-62;

             CLINOPYROXENE             (   18%)
             Size(mm):      0.4-5  Morphology: ELONGATE PRISMS
             CORRODED,INCLUDING PLAG MICROLITES;

             MAGNETITE                 (    6%)
             Size(mm):    0.1-1.2
             INTERGRANULAR;

             GLASS                     (   38%)
             Size(mm):        1-8
             INTERSTITIAL VARIOLITIC TO HYALOPILITIC
             MESOSTASIS*

Alteration - CLAY MINERALS             (   10%)
             Replacing: GLASS
             PSEUDOMORPHS*




Leg : 61    Top/Bottom Interval(mm):   80/ 100  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   630.00   Rock Type: IGNEOUS
Core:  28   Sample Midpoint(m)     :   633.09   Sect/Pc #:  3/PCE 1

ROCK = MICRODOLERITE
       MORE FINE GRAINED THAN PREVIOUS THIN SECTION,
       IDENTICAL TO (28-2, 28-30 CM);
       Texture: MICRODOLERITIC-VARIOLITIC;
       Where sampled: SILL INTERIOR*

Groundmass - PLAGIOCLASE               (   40%)
             Morphology: PRISMS
             AVERAGE LENGTH= 0.1-0.8 MM,APPROX COMP AN60-72,
             MICROLITES;

             CLINOPYROXENE             (   38%)
             Morphology: EQUIDIMENSIONAL
             AVERAGE SIZE= 0.08-0.4;

             MAGNETITE                 (    7%)
             Size(mm):    0.4-0.4
             INTERGRANULAR;

             GLASS                     (   15%)
             INTERSTITIAL VARIOLITIC AGGREGATES*

Alteration - CLAY MINERALS             (   20%)
             Location: INTERSTITIAL   Replacing: GLASS
             BROWN PSEUDOMORPHS*




Leg : 61    Top/Bottom Interval(mm): 1340/1360  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   630.00   Rock Type: IGNEOUS
Core:  28   Sample Midpoint(m)     :   634.35   Sect/Pc #:  3/PCE 3G

ROCK = MICRODOLERITE
       SLIGHTLY MORE FINE GRAINED THAN PREVIOUS THIN
       SECTION,HOLOCRYSTALLINE;
       Texture: MICRODOLERITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   TR%)
             Morphology: ELONGATE PRISMS
             LENGTH= 1.2 MM;

             CLINOPYROXENE             (    1%)
             Morphology: EQUIDIMENSIONAL
             AVERAGE SIZE= 0.5,CORRODED*

Groundmass - PLAGIOCLASE               (35-40%)
             AVERAGE LENGTH= 0.4 MM,APPROX COMP AN58-65,
             MICROLITES;

             CLINOPYROXENE             (53-58%)
             Morphology: EQUIDIMENSIONAL
             AVERAGE SIZE= 0.03 MM;

             MAGNETITE                 (    7%)
             AVERAGE SIZE= 0.2 MM,INTERGRANULAR;

             GLASS
             HOLOCRYSTALLINE*

Alteration - CLAY MINERALS             (   15%)
             Location: GROUNDMASS     Replacing: ALL.MINS
             BROWN PSEUDOMORPHS AND GRAYISH GREEN GROUNDMASS*




Leg : 61    Top/Bottom Interval(mm):  680/ 700  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   630.00   Rock Type: IGNEOUS
Core:  28   Sample Midpoint(m)     :   635.19   Sect/Pc #:  4/PCE 2B

ROCK = MICRODOLERITE
       MORE COARSE GRAINED THAN PREVIOUS THIN SECTION;
       Texture: SPOTTED MICRODOLERITIC-HYALOPILITIC,
       INTERSTITIAL;
       Where sampled: SILL INTERSTITIAL*

Phenocrysts- PLAGIOCLASE               (    2%)
             Morphology: ELONGATE PRISMS
             LENGTH= 0.8-1.2 MM,APPROX COMP AN72;

             CLINOPYROXENE             (    1%)
             Morphology: EQUIDIMENSIONAL
             CORRODED,AVERAGE SIZE= 1.2*

Groundmass - PLAGIOCLASE               (   45%)
             LENGTH= 0.04-0.4 MM,APPROX COMP AN48-65,
             MICROLITES;

             CLINOPYROXENE             (   35%)
             Morphology: EQUIDIMENSIONAL
             AVERAGE SIZE= 0.1 MM;

             MAGNETITE                 (    8%)
             AVERAGE SIZE= 0.07 MM,INTERGRANULAR;

             GLASS                     (   12%)
             Size(mm):    0.1-1.3
             INTERSTITIAL HYALOPILITIC AGGREGATES*

Alteration - CLAY MINERALS             (   20%)
             Location: GROUNDMASS     Replacing: GLASS,ALL.MINS
             BROWN PSEUDOMORPHS AND PALE GRAYISH GREEN IN
             GROUNDMASS*




Leg : 61    Top/Bottom Interval(mm):  260/ 280  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   630.00   Rock Type: IGNEOUS
Core:  28   Sample Midpoint(m)     :   636.27   Sect/Pc #:  5/PCE 1

ROCK = MICRODOLERITE
       MORE COARSE GRAINED THAN PREVIOUS THIN SECTION;
       Texture: MICRODOLERITIC,HOLOCRYSTALLINE;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               ( RARE%)
             RARE RELICTS OF RESORBED COARSE GRAINS;

             CLINOPYROXENE             ( RARE%)
             RARE RELICTS OF RESORBED COARSE GRAINS*

Groundmass - PLAGIOCLASE               (   55%)
             LENGTH= 0.4-1.2,APPROX COMP AN52,MICROLITES;

             CLINOPYROXENE             (   40%)
             Size(mm):    0.2-0.8  Morphology: ELONGATED
             INTERGRANULAR,CORRODED;

             MAGNETITE                 (    5%)
             Size(mm):  0.04-0.08  Morphology: DUST-LIKE

Alteration - CLAY MINERALS             (   30%)
             Replacing: ALL.MINS
             PALE GRAYISH GREEN*




Leg : 61    Top/Bottom Interval(mm):   60/  90  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   636.00   Rock Type: IGNEOUS
Core:  29   Sample Midpoint(m)     :   636.08   Sect/Pc #:  1/PCE 1A

ROCK = DOLERITE;
       Texture: SUBOPHITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (    5%)
             Size(mm):    0.4-0.8  Morphology: SUBHEDRAL-EUHEDRAL

             CLINOPYROXENE             ( 7-10%)
             Size(mm):    0.4-0.9  Morphology: SUBHEDRAL

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):       <0.4  Morphology: EUHEDRAL-SUBHEDRAL
             MICROLITIC,OFTEN FORMS SPHERULITIC AGGREGATES;

             CLINOPYROXENE             (   40%)
             Size(mm):       <0.4  Morphology: SUBHEDRAL
             MICROLITIC;

             MAGNETITE                 (  5-8%)
             Size(mm):       <0.1  Morphology: ANGULAR

             QUARTZ                    (   TR%)

             ALKALI FELDSPAR           (   TR%)

             APATITE

Alteration - CLAY MINERALS             (10-15%)
             Location: SPOTS          Replacing: CPX,PLAG

             CHLORITE




Leg : 61    Top/Bottom Interval(mm): 1020/1050  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   636.00   Rock Type: IGNEOUS
Core:  29   Sample Midpoint(m)     :   640.03   Sect/Pc #:  3/PCE 1D

ROCK = DOLERITE;
       Texture: SUBOPHITIC-OPHITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   15%)
             Size(mm):    0.7-1.0  Morphology: SUBHEDRAL-EUHEDRAL
             APPROX COMP AN55;

             CLINOPYROXENE             (   15%)
             Size(mm):    0.6-1.0  Morphology: SUBHEDRAL-EUHEDRAL

             MAGNETITE                 (  3-5%)
             Size(mm):        0.7  Morphology: SKELETAL
             PARTLY SKELETAL*

Groundmass - PLAGIOCLASE               (   30%)
             Size(mm):       <0.4  Morphology: EUHEDRAL
             APPROX COMP AN60,MICROLITIC;

             CLINOPYROXENE             (   30%)
             Size(mm):       <0.4  Morphology: SUBHEDRAL
             MICROLITIC;

             MAGNETITE                 (    5%)
             Size(mm):       <0.4  Morphology: SKELETAL
             MICROLITIC;

             QUARTZ                    (  1-2%)
             FORMS MICROPEGMATITE WITH ALK.SPAR;

             ALKALI FELDSPAR
             FORMS MICROPEGMATITE WITH QUARTZ;

             KAERSUTITE                (   TR%)

             APATITE
             Morphology: ACICULAR

Alteration - CLAY MINERALS             (  0-5%)
             Location: SPOTS          Replacing: CPX

             CHLORITE                  (    1%)
             Replacing: CPX




Leg : 61    Top/Bottom Interval(mm):  370/ 400  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   636.00   Rock Type: IGNEOUS
Core:  29   Sample Midpoint(m)     :   642.39   Sect/Pc #:  5/PCE 1C

ROCK = DOLERITE;
       Texture: INTERGRANULAR-SUBOPHITIC;
       Where sampled: SILL INTERIOR
       MASSIVE DOLERITE SILL*

Phenocrysts- PLAGIOCLASE               (  1-3%)
             Size(mm):    0.7-0.8  Morphology: SUBHEDRAL
             APPROX COMP AN50;

             CLINOPYROXENE             (10-12%)
             Size(mm):    0.7-1.2  Morphology: EUHEDRAL-SUBHEDRAL
             THE PHENOS OF THIS THIN SECTION ARE CHARACTERIZED
             BY PREVAILING LARGE CPX (ABOUT 1 MM) AND MAGN;

             MAGNETITE                 (  2-4%)
             Size(mm):    0.6-1.0  Morphology: SKELETAL
             THE PHENOS OF THIS THIN SECTION ARE CHARACTERIZED
             BY PREVAILING LARGE CPX (ABOUT 1 MM) AND MAGN*

Groundmass - PLAGIOCLASE               (   36%)
             Size(mm):       <0.3  Morphology: SUBHEDRAL-EUHEDRAL

             CLINOPYROXENE             (   36%)
             Size(mm):       <0.3  Morphology: SUBHEDRAL

             MAGNETITE                 (  4-6%)
             Size(mm):       <0.2  Morphology: SKELETAL

             COMBINATION               (  1-2%)
             INCLUDES QUARTZ + ALK.SPAR FORMING MICROPEGMATITE;

             KAERSUTITE                (    1%)

             APATITE                   (   TR%)

Alteration - CLAY MINERALS             (   10%)
             Location: SPOTS          Replacing: PLAG,CPX

             CHLORITE                  (    5%)
             Replacing: PLAG




Leg : 61    Top/Bottom Interval(mm):  970/1000  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   636.00   Rock Type: IGNEOUS
Core:  29   Sample Midpoint(m)     :   644.49   Sect/Pc #:  6/PCE 1

ROCK = DOLERITE;
       Texture: INTERGRANULAR-SUBOPHITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (  2-3%)
             Size(mm):    0.5-0.9  Morphology: SUBHEDRAL-EUHEDRAL
             APPROX COMP AN60-63;

             CLINOPYROXENE             (  5-7%)
             Size(mm):    0.5-0.9  Morphology: SUBHEDRAL

             MAGNETITE                 (  1-2%)
             Size(mm):        0.7  Morphology: SKELETAL

Groundmass - PLAGIOCLASE               (   41%)
             Size(mm):       <0.3  Morphology: EUHEDRAL-SUBHEDRAL
             MICROLITIC;

             CLINOPYROXENE             (   40%)
             Size(mm):       <0.3  Morphology: SUBHEDRAL
             MICROLITIC;

             MAGNETITE                 (    5%)
             Morphology: SKELETAL

             COMBINATION               (    2%)
             INCLUDES QUARTZ + ALK.SPAR FORMING MICROPEGMATITE;

             KAERSUTITE                (   TR%)

             APATITE                   (   TR%)

Alteration - CLAY MINERALS             (   15%)
             Replacing: CPX

             CHLORITE                  (    5%)
             Replacing: PLAG




Leg : 61    Top/Bottom Interval(mm):  480/ 500  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   645.00   Rock Type: IGNEOUS
Core:  30   Sample Midpoint(m)     :   645.49   Sect/Pc #:  1/PCE 2

ROCK = DOLERITE;
       Texture: SUBOPHITIC-INTERGRANULAR;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   10%)
             Size(mm):    0.4-1.8  Morphology: SUBHEDRAL-EUHEDRAL

             CLINOPYROXENE             (  8-9%)
             Size(mm):    0.4-1.3  Morphology: SUBHEDRAL

             MAGNETITE                 (    4%)
             Size(mm):        0.4  Morphology: SKELETAL

Groundmass - PLAGIOCLASE               (   30%)
             Size(mm):       <0.4  Morphology: EUHEDRAL-SUBHEDRAL
             MICROLITIC;

             CLINOPYROXENE             (   40%)
             Size(mm):       <0.4  Morphology: SUBHEDRAL
             MICROLITIC;

             MAGNETITE                 (    3%)
             Size(mm):       <0.2  Morphology: SKELETAL
             MICROLITIC;

             COMBINATION               (  0-1%)
             INCLUDES QUARTZ + ALK.SPAR FORMING MICROPEGMATITE;

             KAERSUTITE                (  0-1%)

Alteration - CLAY MINERALS             (  5-6%)
             Location: SPOTS          Replacing: CPX

             CHLORITE                  (  5-6%)
             Location: SPOTS          Replacing: PLAG,HBL




Leg : 61    Top/Bottom Interval(mm):  210/ 230  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   645.00   Rock Type: IGNEOUS
Core:  30   Sample Midpoint(m)     :   649.72   Sect/Pc #:  4/PCE 1

ROCK = DOLERITE;
       Texture: SUBOPHITIC-INTERGRANULAR;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (  5-8%)
             Size(mm):    0.4-0.7  Morphology: SUBHEDRAL
             ZONED,APPROX COMP AN40-60;

             CLINOPYROXENE             (    4%)
             Size(mm):    0.4-0.8  Morphology: SUBHEDRAL-EUHEDRAL

             MAGNETITE                 (  1-2%)
             Size(mm):    0.5-0.8  Morphology: SKELETAL

Groundmass - PLAGIOCLASE               (   42%)
             Size(mm):       <0.4  Morphology: SUBHEDRAL-EUHEDRAL

             CLINOPYROXENE             (   40%)
             Size(mm):       <0.4  Morphology: SUBHEDRAL

             MAGNETITE                 (  3-4%)
             Size(mm):       <0.2  Morphology: SKELETAL-ACICULAR

             COMBINATION               (  0-1%)
             INCLUDES QUARTZ + ALK.SPAR FORMING MICROPEGMATITE;

             KAERSUTITE                (  0-1%)
             Size(mm):       <0.2

             HORNBLENDE
             GREEN*

Alteration - CLAY MINERALS             ( 5-10%)
             Location: SPOTS          Replacing: CPX

             CHLORITE                  (    5%)
             Location: SPOTS          Replacing: PLAG




Leg : 61    Top/Bottom Interval(mm):  480/ 500  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   654.00   Rock Type: IGNEOUS
Core:  31   Sample Midpoint(m)     :   654.49   Sect/Pc #:  1/PCE 2A

ROCK = DOLERITE;
       Texture: SUBOPHITIC-INTERGRANULAR;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               ( 8-10%)
             Size(mm):    0.4-0.7  Morphology: SUBHEDRAL
             APPROX COMP AN60-50;

             CLINOPYROXENE             (  3-5%)
             Size(mm):    0.4-0.7  Morphology: EUHEDRAL-SUBHEDRAL

             MAGNETITE                 (  1-2%)
             Size(mm):        0.4  Morphology: SKELETAL
             TI-MAGN*

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):       <0.3  Morphology: SUBHEDRAL-EUHEDRAL

             CLINOPYROXENE             (   35%)
             Size(mm):       <0.4  Morphology: SUBHEDRAL

             CLINOPYROXENE             (   35%)
             Size(mm):       <0.4  Morphology: SUBHEDRAL

             MAGNETITE                 (  4-5%)
             Size(mm):       <0.2  Morphology: SKELETAL

             COMBINATION               (    2%)
             INCLUDES QUARTZ + ALK.SPAR FORMING MICROPEGMATITE;

             KAERSUTITE                (  0-1%)
             Size(mm):        0.1

Alteration - CLAY MINERALS             (  3-5%)
             Location: SPOTS          Replacing: CPX

             CHLORITE                  (  3-5%)
             Location: SPOTS          Replacing: PLAG




Leg : 61    Top/Bottom Interval(mm):  440/ 480  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   655.50   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   655.96   Sect/Pc #:  1/PCE 3

ROCK = DOLERITE;
       Texture: HYALOPILITIC-INTERSERTAL;
       Where sampled: NEXT TO GLASSY MARGIN*

Phenocrysts- PLAGIOCLASE               (  1-2%)
             Size(mm):    0.4-0.8  Morphology: PRISMATIC
             APPROX COMP AN60-65;

             CLINOPYROXENE             (  2-3%)
             Size(mm):    0.4-0.8  Morphology: SUBHEDRAL
             OFTEN FORMS AGGREGATES*

Groundmass - PLAGIOCLASE               (   42%)
             Size(mm):       <0.2  Morphology: SUBHEDRAL

             CLINOPYROXENE             (   42%)
             Size(mm):      <0.05  Morphology: SUBHEDRAL

             MAGNETITE                 (  2-3%)
             Size(mm):      <0.01  Morphology: DUST-LIKE

             GLASS                     ( 5-10%)
             ALTERED TO CLAY*

Alteration - CLAY MINERALS             (10-20%)
             Location: INTERSTITIAL   Replacing: GLASS,CPX

             CHLORITE
             Location: VEIN,SPOTS




Leg : 61    Top/Bottom Interval(mm):  980/   0  Describer: Moberly, R.
Hole: 462A  Top of Core Depth(m)   :   655.50   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   657.98   Sect/Pc #:  2/

ROCK = HYALOCLASTITE
       CEMENTED BY ZEOLITES,GRAINS= 60%,PERCENT TEXTURE=
       30% SAND + 70% SILT*

Groundmass - PLAGIOCLASE               (    1%)

             GLASS                     (   40%)
             ONLY SLIGHTLY ALTERED,ANGULAR AND BLOCKY-POLYGONAL
             TO SUBROUNDED,SIZE RANGE IS 10-120 MICRONS BUT
             MOST GRAINS ARE 50-70 MICRONS (COARSE SILT OR FINE
             SAND),POORLY PACKED,WELL SORTED;

             OTHER                     (   19%)
             VOLCANIC GRAINS OF LITHIC AND ALTERED LITHIC
             BASALT*

Alteration - CLAY MINERALS
             IN ALTERED GLASS;

             ZEOLITE                   (   40%)
             PROBABLY CLINOPTILOLITE,CEMENT CONSISTS OF A
             MOSAIC OF LATHS (5X2 MICRONS) OF ZEOLITES*




Leg : 61    Top/Bottom Interval(mm):  100/ 120  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   685.00   Rock Type: IGNEOUS
Core:  36   Sample Midpoint(m)     :   685.11   Sect/Pc #: CC/PCE 2

ROCK = CPX-PLAG MODERATELY MICROPHYRIC BASALT;
       Texture: MODERATELY MICROPHYRIC,HYALOPILITIC-SPHERULITIC;
       Where sampled: SILL MARGINAL ZONE*

Phenocrysts- PLAGIOCLASE               (    2%)
             Size(mm):    0.2-0.4  Morphology: EUHEDRAL
             ZONED,MICROPHENOS,APPROX COMP AN80,IN
             GLOMEROPHYRIC CLUSTERS WITH CPX;

             CLINOPYROXENE             (    3%)
             Size(mm):    0.1-0.3  Morphology: SUBHEDRAL
             AUGITE,IN GLOMEROPHYRIC CLUSTERS WITH PLAG,
             MICROPHENOS*

Groundmass - PLAGIOCLASE               (   28%)
             Size(mm):       <0.2  Morphology: SKELETAL,QUENCH,ANHEDRAL

             CLINOPYROXENE             (   37%)
             Size(mm):       <0.2
             AUGITE;

             MAGNETITE
             Size(mm):      <0.04  Morphology: SKELETAL,QUENCH,GRANULAR
             TI-MAGN;

             GLASS                     (10-15%)

Alteration - CLAY MINERALS             (   20%)
             Replacing: CPX,GLASS
             BROWNISH GREEN*




Leg : 61    Top/Bottom Interval(mm):  210/ 230  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   685.00   Rock Type: IGNEOUS
Core:  36   Sample Midpoint(m)     :   685.22   Sect/Pc #: CC/PCE 3

ROCK = PLAG SPARSELY MICROPHYRIC BASALT
       MORE FINE GRAINED THAN PREVIOUS THIN SECTION,HAS
       VEIN-LIKE INTERSERTAL SEGREGATION;
       Texture: SPARSELY MICROPHYRIC,VARIOLITIC;
       Where sampled: GLASSY SILL MARGIN*

Phenocrysts- PLAGIOCLASE               (    1%)
             Size(mm):        0.2
             IN GLOMEROPHYRIC AGGREGATES WITH CPX,MICROPHENOS;

             CLINOPYROXENE             (   TR%)
             AVERAGE SIZE= 0.4 MM,IN GLOMEROPHYRIC AGGREGATES
             WITH PLAG*

Groundmass - PLAGIOCLASE               (    2%)
             Size(mm):      <0.04  Morphology: LATHS
             IN VARIOLITIC MESOSTASIS;

             CLINOPYROXENE             (   >1%)
             Size(mm):       0.08  Morphology: EQUIDIMENSIONAL

             MAGNETITE
             Size(mm):      <0.01  Morphology: DUST-LIKE
             PERCENTAGE IS UNKNOWN;

             GLASS                     (  >95%)
             VARIOLITIC MESOSTASIS*

Alteration - CLAY MINERALS             (    1%)
             Replacing: CPX,PLAG
             PSEUDOMORPHS AFTER CPX + PLAG IN
             GLOMEROPORPHYRITIC AGGREGATES,DARK BROWNISH GREEN;

             CLAY MINERALS             (  >90%)
             Location: MESOSTASIS     Replacing: GLASS
             BROWN*




Leg : 61    Top/Bottom Interval(mm):  340/ 360  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   685.00   Rock Type: IGNEOUS
Core:  36   Sample Midpoint(m)     :   685.35   Sect/Pc #: CC/PCE 4

ROCK = APHYRIC BASALT;
       Texture: APHYRIC,INTERGRANULAR;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   <1%)
             Size(mm):    0.3-0.5  Morphology: EUHEDRAL
             CORRODED,MICROPHENOS;

             CLINOPYROXENE             (   <1%)
             Size(mm):        0.4
             AUGITE,SUBOPHITIC,MICROPHENOS*

Groundmass - PLAGIOCLASE
             Size(mm):    0.1-0.3  Morphology: LATHS
             APPROX COMP AN65;

             CLINOPYROXENE
             Size(mm):    0.1-0.2  Morphology: GRANULAR
             AUGITE;

             MAGNETITE
             Size(mm):      <0.04
             TI-MAGN*

Alteration - AMPHIBOLE
             Replacing: CPX

             CLAY MINERALS             (   15%)
             Replacing: ALL.MINS
             BROWN*




Leg : 61    Top/Bottom Interval(mm):  530/ 550  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   691.00   Rock Type: IGNEOUS
Core:  38   Sample Midpoint(m)     :   691.54   Sect/Pc #:  1/PCE 6

ROCK = DOLERITE
       FRESH;
       Texture: SUBOPHITIC;
       Where sampled: SILL INTERIOR*

Groundmass - PLAGIOCLASE               (   42%)
             Size(mm):    0.3-0.5  Morphology: SUBHEDRAL-ANHEDRAL
             APPROX COMP AN70;

             CLINOPYROXENE             (   43%)
             Size(mm):    0.3-0.5
             2VZ 50,AUGITE;

             MAGNETITE                 (   10%)
             Size(mm):       <0.5
             TI-MAGN;

             COMBINATION               (   TR%)
             INCLUDES QUARTZ + ALK.SPAR GRANOPHYRES (AT LEAST
             QUARTZ IS PRESENT);

             APATITE                   (   TR%)

Alteration - CLAY MINERALS             (    5%)
             Replacing: CPX
             BROWN*




Leg : 61    Top/Bottom Interval(mm):  180/ 200  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   691.00   Rock Type: IGNEOUS
Core:  38   Sample Midpoint(m)     :   692.69   Sect/Pc #:  2/PCE 1

ROCK = DOLERITE
       RELATIVELY FRESH,FINE;
       Texture: DIABASIC;
       Where sampled: SILL INTERIOR*

Groundmass - PLAGIOCLASE               (   41%)
             Size(mm):    0.1-0.2
             APPROX COMP AN60;

             CLINOPYROXENE             (   41%)
             Size(mm):    0.1-0.2
             AUGITE;

             MAGNETITE                 (    5%)
             Size(mm):      <0.04
             TI-MAGN;

             GLASS                     (    3%)
             ALTERED INTERSTITIAL PATCHES;

             COMBINATION               (   TR%)
             INCLUDES QUARTZ + ALK.SPAR GRANOPHYRIC PATCHES*

Alteration - CLAY MINERALS             (   10%)
             Replacing: CPX,GLASS
             BROWN*




Leg : 61    Top/Bottom Interval(mm):  420/ 460  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   691.00   Rock Type: IGNEOUS
Core:  38   Sample Midpoint(m)     :   692.94   Sect/Pc #:  2/PCE 1

ROCK = PLAG-CPX MODERATELY MICROPHYRIC BASALT
       FAIRLY FRESH;
       Texture: MODERATELY MICROPHYRIC,VARIOLITIC,HYALOPILITIC,
       INTERGRANULAR;
       Where sampled: GLASSY SILL MARGIN*

Phenocrysts- PLAGIOCLASE               (    2%)
             Size(mm):    0.1-0.2  Morphology: EUHEDRAL
             GLOMEROPHYRIC CLUSTERS WITH CPX,MICROPHENOS;

             CLINOPYROXENE             (    2%)
             Size(mm):    0.2-0.5  Morphology: EUHEDRAL
             GLOMEROPHYRIC CLUSTERS WITH PLAG,MICROPHENOS*

Groundmass - PLAGIOCLASE               (   30%)
             Size(mm):      <0.04
             IN INTERGRANULAR PATCHES;

             CLINOPYROXENE             (   61%)
             Size(mm):      <0.04
             IN INTERGRANULAR PATCHES;

             MAGNETITE                 (    5%)
             Size(mm):      <0.04
             TI-MAGN*

Alteration - CLAY MINERALS             ( 5-20%)
             Location: SPOTS          Replacing: GLASS,CPX




Leg : 61    Top/Bottom Interval(mm):  490/ 510  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   691.00   Rock Type: IGNEOUS
Core:  38   Sample Midpoint(m)     :   693.00   Sect/Pc #:  2/PCE 2

ROCK = PLAG-CPX MODERATELY MICROPHYRIC BASALT
       FRESH;
       Texture: MODERATELY MICROPHYRIC,GLASSY-VARIOLITIC;
       Where sampled: GLASSY SILL MARGIN*

Phenocrysts- PLAGIOCLASE               (    4%)
             Size(mm):    0.1-0.3  Morphology: EUHEDRAL
             MICROPHENOS,APPROX COMP AN70,IN GLOMEROPHYRIC
             AGGREGATES WITH CPX;

             CLINOPYROXENE             (    2%)
             Size(mm):    0.1-0.2  Morphology: EUHEDRAL
             MICROPHENOS,AUGITE,IN GLOMEROPHYRIC AGGREGATES
             WITH PLAG*

Groundmass - CLINOPYROXENE
             Morphology: SKELETAL
             QUENCH;

             PLAGIOCLASE
             PROBABLE MICROLITES,SWALLOW-TAIL TEXTURED;

             GLASS                     (   94%)
             APPEARS EITHER DEVITRIFIED OR ALTERED,IT IS BROWN
             AND SLIGHTLY ISOTROPIC*

Alteration - COMBINATION
             Location: GROUNDMASS     Replacing: GROUNDMASS,PHENOS
             INCLUDES CLAY + CHLORITE,DIFFICULT TO ESTIMATE
             PERCENTAGE BUT BOTH ARE PRESENT REPLACING BOTH
             GROUNDMASS AND PHENOS*




Leg : 61    Top/Bottom Interval(mm):  640/ 670  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   691.00   Rock Type: IGNEOUS
Core:  38   Sample Midpoint(m)     :   693.16   Sect/Pc #:  2/PCE 2

ROCK = CPX-PLAG SPARSELY MICROPHYRIC BASALT
       MASSIVE;
       Texture: SPARSELY MICROPHYRIC,INTERSERTAL;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   <1%)
             Size(mm):        0.2  Morphology: EUHEDRAL-SUBHEDRAL
             MICROPHENOS,APPROX COMP AN72;

             CLINOPYROXENE             (    1%)
             Size(mm):        0.1  Morphology: EUHEDRAL-SUBHEDRAL
             MICROPHENOS,AUGITE*

Groundmass - PLAGIOCLASE               (   25%)
             Size(mm):      <0.04  Morphology: SUBHEDRAL
             MICROLITES,APPROX COMP AN70-72;

             CLINOPYROXENE             (   44%)
             Size(mm):      <0.04  Morphology: SUBHEDRAL-GRANULAR
             AUGITE,QUENCH TEXTURED;

             MAGNETITE                 (    5%)
             Size(mm):      <0.02

             GLASS                     ( 5-10%)
             DIFFICULT TO IDENTIFY DUE TO REPLACEMENT BY CLAY,
             VARIOLITIC/SPHERULITIC PATCHES ARE PRESENT*

Alteration - CLAY MINERALS             (   25%)
             Replacing: ALL.MINS,GLASS
             BROWN*




Leg : 61    Top/Bottom Interval(mm): 1260/1280  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   691.00   Rock Type: IGNEOUS
Core:  38   Sample Midpoint(m)     :   693.77   Sect/Pc #:  2/PCE 5

ROCK = APHYRIC BASALT
       ALTERED,FINE GRAINED (BUT MORE COARSE GRAINED THAN
       PREVIOUS THIN SECTION);
       Texture: APHYRIC,INTERSERTAL;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   <1%)
             Size(mm):    0.1-0.3  Morphology: EUHEDRAL
             MICROPHENOS,APPROX COMP AN70,IN GLOMEROPHYRIC
             CLOTS WITH CPX;

             CLINOPYROXENE             (   <1%)
             Size(mm):    0.1-0.2  Morphology: EUHEDRAL
             MICROPHENOS,AUGITE,IN GLOMEROPHYRIC CLOTS WITH
             PLAG*

Groundmass - PLAGIOCLASE               (   25%)
             Size(mm):      <0.04  Morphology: SUBHEDRAL,LATH-LIKE
             MICROLITES,APPROX COMP AN70;

             CLINOPYROXENE             (   49%)
             Size(mm):      <0.04  Morphology: SUBHEDRAL-GRANULAR
             AUGITE,QUENCH TEXTURED,HIGH CPX/PLAG RATIO MAY
             ONLY BE APPARENT BECAUSE OF THE LARGE QUANTITY OF
             QUENCH MATERIAL;

             MAGNETITE
             Size(mm):      <0.02
             TI-MAGN*

Alteration - CLAY MINERALS             (   25%)
             Replacing: GLASS,ALL.MINS
             BROWN*




Leg : 61    Top/Bottom Interval(mm):  510/ 540  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   692.00   Rock Type: IGNEOUS
Core:  39   Sample Midpoint(m)     :   692.53   Sect/Pc #:  1/PCE 4

ROCK = CPX SPARSELY MICROPHYRIC BASALT;
       Texture: SPARSELY MICROPHYRIC,VARIOLITIC;
       Where sampled: SILL TOP*

Phenocrysts- PLAGIOCLASE               (   TR%)
             Morphology: ELONGATE PRISMS
             AVERAGE LENGTH= 0.4 MM,APPROX COMP AN68,RARELY
             TABULAR,MICROPHENOS;

             CLINOPYROXENE             (    1%)
             Morphology: EUHEDRAL
             AVERAGE SIZE= 0.3 MM,MICROPHENOS*

Groundmass - PLAGIOCLASE               (    2%)
             Size(mm):     <0.002  Morphology: LATHS

             CLINOPYROXENE             (   TR%)
             Size(mm):     <0.002

             MAGNETITE                 (    7%)
             Size(mm):      0.002  Morphology: DUST-LIKE

             GLASS                     (   91%)
             ALTERED TO PALAGONITE (REDDISH BROWN)*

Alteration - CLAY MINERALS             (   91%)
             Location: GROUNDMASS     Replacing: GLASS
             PALAGONITE,REDDISH BROWN*




Leg : 61    Top/Bottom Interval(mm):  970/ 990  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   692.00   Rock Type: IGNEOUS
Core:  39   Sample Midpoint(m)     :   694.48   Sect/Pc #:  2/PCE 5A

ROCK = MICRODOLERITE
       MORE COARSE GRAINED THAN PREVIOUS THIN SECTION;
       Texture: MICRODOLERITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- OLIVINE                   (   TR%)
             Morphology: EUHEDRAL,RHOMBIC
             CLAY PSEUDOMORPHS,MICROPHENOS;

             PLAGIOCLASE               (   TR%)
             Morphology: TABULAR
             ZONED,APPROX COMP AN52-68,MICROPHENOS;

             CLINOPYROXENE             (   TR%)
             Morphology: EQUIDIMENSION
             AVERAGE SIZE= 0.4 MM,MICROPHENOS*

Groundmass - OLIVINE                   (    5%)
             AVERAGE SIZE= 0.2 MM,CLAY PSEUDOMORPHS;

             PLAGIOCLASE
             Morphology: ELONGATE PRISMS
             AVERAGE LENGTH= 0.4 MM,APPROX COMP AN80;

             CLINOPYROXENE
             Morphology: EQUIDIMENSIONAL
             AVERAGE SIZE= 0.08 MM;

             MAGNETITE                 (    7%)
             Morphology: DUST-LIKE
             INTERGRANULAR;

             GLASS                     (    0%)
             HOLOCRYSTALLINE ROCK;

             SPINEL
             Size(mm):       0.02  Morphology: EUHEDRAL
             CR-SPINEL,INCLUSIONS IN CLAY PSEUDOMORPHS*

Alteration - CLAY MINERALS             (    5%)
             Replacing: OL
             PSEUDOMORPHS AFTER OL,REDDISH BROWN PALAGONITE*




Leg : 61    Top/Bottom Interval(mm):  760/ 780  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   692.00   Rock Type: IGNEOUS
Core:  39   Sample Midpoint(m)     :   695.77   Sect/Pc #:  3/PCE 3A

ROCK = MICRODOLERITE
       MORE FINE GRAINED THAN PREVIOUS THIN SECTION,
       VARIOLITIC SPOTS PRESENT;
       Texture: MICRODOLERITIC;
       Where sampled: NEAR SILL BOTTOM*

Groundmass - OLIVINE
             Size(mm):   0.08-0.2  Morphology: EUHEDRAL
             CLAY PSEUDOMORPHS;

             PLAGIOCLASE
             AVERAGE LENGTH= 0.2 MM,APPROX COMP AN72-85;

             CLINOPYROXENE
             AVERAGE SIZE= 0.08 MM,INTERSTITIAL,SOMETIMES AS
             RADIADED AGGREGATES;

             MAGNETITE                 (    5%)
             Size(mm):   0.04-0.1  Morphology: DUST-LIKE,LATHS
             RARELY LATHS;

             GLASS                     (   10%)
             Size(mm):    0.3-0.4
             INTERSTITIAL VARIOLITIC AGGREGATES*

Alteration - CLAY MINERALS             (    1%)
             Replacing: OL
             GRAYISH BROWN EUHEDRAL PSEUDOMORPHS*

             CLAY MINERALS             (   10%)
             REDDISH BROWN,PALAGONITE,VARIOLITIC AGGREGATES*




Leg : 61    Top/Bottom Interval(mm): 1420/1440  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   692.00   Rock Type: IGNEOUS
Core:  39   Sample Midpoint(m)     :   696.43   Sect/Pc #:  3/PCE 3F

ROCK = APHYRIC BASALT
       MORE FINE GRAINED THAN PREVIOUS THIN SECTION;
       Texture: APHYRIC,VARIOLITIC;
       Where sampled: SILL BOTTOM*

Groundmass - OLIVINE                   (   TR%)
             Size(mm):        0.1  Morphology: EUHEDRAL
             CLAY PSEUDOMORPHS;

             PLAGIOCLASE               (    3%)
             Size(mm):      <0.04  Morphology: LATHS

             CLINOPYROXENE             (    1%)
             Size(mm):       0.04  Morphology: EQUIDIMENSIONAL

             MAGNETITE                 (    5%)
             Size(mm):      <0.02  Morphology: DUST-LIKE

             GLASS                     (   91%)
             GROUNDMASS*

Alteration - CLAY MINERALS             (   91%)
             Location: MESOSTASIS     Replacing: GLASS,OL
             REDDISH BROWN PALAGONITE,PSEUDOMORPHS AFTER OL*




Leg : 61    Top/Bottom Interval(mm):  670/ 700  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   692.00   Rock Type: IGNEOUS
Core:  39   Sample Midpoint(m)     :   697.19   Sect/Pc #:  4/PCE 7

ROCK = APHYRIC BASALT;
       Texture: APHYRIC,VARIOLITIC;
       Where sampled: SILL TOP*

Groundmass - OLIVINE                   (   TR%)
             Size(mm):        0.1  Morphology: EUHEDRAL
             CLAY PSEUDOMORPHS;

             PLAGIOCLASE               (    3%)
             Size(mm):      <0.04  Morphology: LATHS

             CLINOPYROXENE             (    1%)
             Size(mm):       0.04  Morphology: EQUIDIMENSIONAL

             MAGNETITE                 (    5%)
             Size(mm):      <0.02  Morphology: DUST-LIKE

             GLASS                     (   91%)
             GROUNDMASS*

Alteration - CLAY MINERALS             (   91%)
             Location: MESOSTASIS     Replacing: GLASS,OL
             REDDISH BROWN PALAGONITE,PSEUDOMORPHS AFTER OL*




Leg : 61    Top/Bottom Interval(mm):  660/ 680  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   692.00   Rock Type: IGNEOUS
Core:  39   Sample Midpoint(m)     :   698.67   Sect/Pc #:  5/PCE 5

ROCK = CPX SPARSELY MICROPHYRIC BASALT
       SLIGHTLY MORE COARSE GRAINED THAN PREVIOUS THIN
       SECTION;
       Texture: APHYRIC,VARIOLITIC;
       Where sampled: SILL INTERIOR NEAR BOTTOM*

Phenocrysts- PLAGIOCLASE               (   TR%)
             AVERAGE LENGTH= 0.6 MM,MICROLITES;

             CLINOPYROXENE             (    1%)
             Morphology: EUHEDRAL
             AVERAGE SIZE= 0.2 MM,MICROPHENOS*

Groundmass - OLIVINE                   (   TR%)
             AVERAGE SIZE= 0.2 MM,AROUND CLAY PSEUDOMORPHS;

             PLAGIOCLASE               (    5%)
             Morphology: LATHS
             AVERAGE LENGTH= 0.2 MM;

             CLINOPYROXENE             (    2%)
             Morphology: EQUIDIMENSIONAL
             AVERAGE SIZE= 0.05 MM;

             MAGNETITE
             Size(mm):      <0.04  Morphology: DUST-LIKE

             GLASS                     (   92%)
             MESOSTASIS ALTERED TO CLAY*

Alteration - CLAY MINERALS             (   92%)
             Location: MESOSTASIS     Replacing: GLASS,OL
             PSEUDOMORPHS AFTER OL*




Leg : 61    Top/Bottom Interval(mm):  980/1000  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   692.00   Rock Type: IGNEOUS
Core:  39   Sample Midpoint(m)     :   698.99   Sect/Pc #:  5/PCE 8

ROCK = CPX-OL SLIGHTLY MICROPHYRIC BASALT
       SLIGHTLY MORE FINE GRAINED THAN PREVIOUS THIN
       SECTION;
       Texture: SLIGHTLY MICROPHYRIC,VARIOLITIC;
       Where sampled: SILL BOTTOM*

Phenocrysts- OLIVINE                   (    1%)
             Size(mm):        0.2
             MICROPHENOS;

             PLAGIOCLASE               (   TR%)
             Size(mm):        0.7  Morphology: TABULAR
             RARE MEGACRYSTS,APPROX COMP AN80;

             CLINOPYROXENE             (    1%)
             Morphology: EUHEDRAL
             AVERAGE SIZE= 0.4 MM,MICROPHENOS*

Groundmass - PLAGIOCLASE               (    2%)
             Morphology: LATHS
             APPROX COMP AN68;

             CLINOPYROXENE             (    1%)
             Morphology: EQUIDIMENSIONAL

             MAGNETITE
             Size(mm):      <0.02  Morphology: DUST-LIKE

             GLASS                     (   95%)
             MESOSTASIS ALTERED TO CLAY*

Alteration - CLAY MINERALS             (   95%)
             Location: MESOSTASIS     Replacing: GLASS




Leg : 61    Top/Bottom Interval(mm):  500/ 520  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   702.00   Rock Type: IGNEOUS
Core:  40   Sample Midpoint(m)     :   702.51   Sect/Pc #:  1/PCE 4C

ROCK = CPX-OL-PLAG MODERATELY MICROPHYRIC BASALT
       MASSIVE;
       Texture: MODERATELY MICROPHYRIC,HYALOPILITIC;
       Where sampled: GLASSY MARGIN*

Phenocrysts- OLIVINE                   (    2%)
             Size(mm):        0.4
             PSEUDOMORPH,MICROPHENOS;

             PLAGIOCLASE               (  1-2%)
             Size(mm):    0.4-0.6  Morphology: SUBHEDRAL
             APPROX COMP AN65-70,FORMS AGGREGATES WITH CPX;

             CLINOPYROXENE             (  2-3%)
             Size(mm):    0.3-0.4  Morphology: SUBHEDRAL
             MICROPHENOS,FORMS AGGREGATES WITH PLAG*

Groundmass - PLAGIOCLASE               (   20%)
             Size(mm):      <0.15  Morphology: SUBHEDRAL

             CLINOPYROXENE             (30-35%)
             Size(mm):      <0.06  Morphology: SLIGHTLY SPHERULITIC-

             Morphology: DENDRITIC

             MAGNETITE                 (   10%)
             Size(mm):      <0.01  Morphology: DUST-LIKE

             GLASS                     (25-30%)
             ALTERED TO CLAY MINS*

Alteration - CLAY MINERALS             (   30%)
             Location: MESOSTASIS     Replacing: GLASS,PLAG,CPX




Leg : 61    Top/Bottom Interval(mm):  570/ 600  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   702.00   Rock Type: IGNEOUS
Core:  40   Sample Midpoint(m)     :   702.59   Sect/Pc #:  1/PCE 5A

ROCK = CPX-PLAG-OL MODERATELY MICROPHYRIC BASALT
       MASSIVE;
       Texture: MODERATELY MICROPHYRIC,HYALOPILITIC;
       Where sampled: GLASSY MARGIN*

Phenocrysts- OLIVINE                   (    1%)
             Size(mm):        0.2
             PSEUDOMORPH,MICROPHENOS;

             PLAGIOCLASE               (    1%)
             Size(mm):    0.3-0.4  Morphology: SUBHEDRAL
             APPROX COMP AN65,MICROPHENOS,OFTEN FORMS
             AGGREGATES WITH CPX;

             CLINOPYROXENE             (  1-2%)
             Size(mm):    0.2-0.3  Morphology: EUHEDRAL
             MICROPHENOS,OFTEN FORMS AGGREGATES WITH PLAG*

Groundmass - PLAGIOCLASE               (   15%)
             Size(mm):      <0.05  Morphology: ANHEDRAL

             CLINOPYROXENE             (   15%)
             Size(mm):      <0.05  Morphology: SUBHEDRAL-ANHEDRAL

             MAGNETITE                 (    7%)
             Size(mm):      <0.01  Morphology: DUST-LIKE

             GLASS                     (   60%)
             ALTERED TO CLAY (OR ZEOLITE)*

Alteration - COMBINATION               (20-30%)
             Location: MESOSTASIS     Replacing: GLASS
             INCLUDES CLAYS + ZEOLITES*




Leg : 61    Top/Bottom Interval(mm):  230/ 250  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   702.00   Rock Type: IGNEOUS
Core:  40   Sample Midpoint(m)     :   703.74   Sect/Pc #:  2/PCE 1A

ROCK = DOLERITE;
       Texture: HYALOPILITIC;
       Where sampled: GLASSY MARGIN OF SILL*

Phenocrysts- PLAGIOCLASE               (10-12%)
             Size(mm):    0.4-0.8  Morphology: ACICULAR-SUBHEDRAL
             APPROX COMP AN70;

             CLINOPYROXENE             (10-12%)
             Size(mm):        0.2  Morphology: EUHEDRAL-SUBHEDRAL
             MICROPHENOS*

Groundmass - PLAGIOCLASE               (   10%)
             Size(mm):       <0.4  Morphology: ACICULAR

             CLINOPYROXENE             (   10%)
             Size(mm):       <0.1  Morphology: SUBHEDRAL-ANHEDRAL

             MAGNETITE                 ( 5-10%)
             Size(mm):      <0.01  Morphology: DUST-LIKE

             GLASS                     (45-50%)
             ALTERED TO CLAY MIN OR ZEOLITE*

Alteration - CARBONATE                 (    5%)
             Replacing: CPX MICROPHENOS

             COMBINATION               (   30%)
             Location: MESOSTASIS
             INCLUDES CLAYS + ZEOLITES*




Leg : 61    Top/Bottom Interval(mm):  410/ 430  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   702.00   Rock Type: IGNEOUS
Core:  40   Sample Midpoint(m)     :   703.92   Sect/Pc #:  2/PCE 1B

ROCK = DOLERITE;
       Texture: INTERSERTAL-SUBOPHITIC;
       Where sampled: NEXT TO GLASSY MARGIN OF SILL*

Phenocrysts- PLAGIOCLASE               (   20%)
             Size(mm):    0.4-0.8  Morphology: PRISMATIC
             APPROX COMP AN55,FORMING A SPHERULITIC TEXTURE;

             CLINOPYROXENE             (   26%)
             Size(mm):    0.2-0.5  Morphology: SUBHEDRAL
             0.2 MM IS PREVAILING,MICROPHENOS*

Groundmass - OLIVINE                   (    1%)
             Size(mm):        0.2
             PSEUDOMORPH;

             PLAGIOCLASE               (   25%)
             Size(mm):       <0.3  Morphology: SUBHEDRAL-EUHEDRAL
             PARTLY MICROLITIC;

             CLINOPYROXENE             (   25%)
             Size(mm):       <0.1  Morphology: SUBHEDRAL-ANHEDRAL
             PARTLY MICROLITIC;

             MAGNETITE                 (  3-5%)
             Size(mm):    0.1-0.2  Morphology: ANGULAR-PRISMATIC

Alteration - COMBINATION               (10-15%)
             Location: INTERSTITIAL   Replacing: CPX,PLAG
             INCLUDES CLAYS + ZEOLITES*




Leg : 61    Top/Bottom Interval(mm):  100/ 120  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   711.00   Rock Type: IGNEOUS
Core:  41   Sample Midpoint(m)     :   711.11   Sect/Pc #:  1/PCE 1

ROCK = DOLERITE;
       Texture: INTERGRANULAR-SUBOPHITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   40%)
             Size(mm):    0.3-0.8  Morphology: ACICULAR,SUBHEDRAL
             APPROX COMP AN65,0.8 MM= ACICULAR TYPE AND 0.3 MM=
             SUBHEDRAL TYPE;

             CLINOPYROXENE             (   40%)
             Size(mm):    0.2-0.3  Morphology: SUBHEDRAL

             MAGNETITE                 (    5%)
             Size(mm):        0.2  Morphology: ANGULAR
             TI-MAGN*

Groundmass - PLAGIOCLASE               (    5%)
             Size(mm):       <0.1  Morphology: SUBHEDRAL
             PARTLY MICROLITIC;

             CLINOPYROXENE             (    5%)
             Size(mm):       <0.1  Morphology: SUBHEDRAL
             PARTLY MICROLITIC;

             MAGNETITE                 (    2%)
             Size(mm):       <0.1  Morphology: DUST-LIKE
             PARTLY MICROLITIC*

Alteration - CLAY MINERALS             (  5-8%)
             Location: PLAG,          Replacing: PLAG
             Location: INTERSTITIAL
             FOUND WITHIN PLAG AND INTERSTITIAL;

             CHLORITE                  (    3%)




Leg : 61    Top/Bottom Interval(mm): 1300/1330  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   711.00   Rock Type: IGNEOUS
Core:  41   Sample Midpoint(m)     :   712.32   Sect/Pc #:  1/PCE 5C

ROCK = DOLERITE
       FROM A MASSIVE DOLERITE SILL;
       Texture: INTERSERTAL TO INTERGRANULAR;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   10%)
             Size(mm):    0.3-0.8  Morphology: ACICULAR,SUBHEDRAL
             2 TYPES (EITHER ACICULAR OR SUBHEDRAL,APPROX COMP
             AN65,MEGACRYST (2-2.5 MM / APPROX COMP AN75-80);

             CLINOPYROXENE             (   10%)
             Size(mm):    0.3-0.4  Morphology: SUBHEDRAL
             MICROPHENOS*

Groundmass - PLAGIOCLASE               (   35%)
             Size(mm):       <0.2  Morphology: SUBHEDRAL
             MICROLITES;

             CLINOPYROXENE             (   40%)
             Size(mm):       <0.2  Morphology: SUBHEDRAL
             MICROLITES;

             MAGNETITE                 (  4-5%)
             Size(mm):       <0.2  Morphology: ANGULAR
             CLOSELY ASSOCIATED WITH ALTERED PARTS,MICROLITES;

             COMBINATION               (   TR%)
             INCLUDES QUARTZ + ALK.SPAR,INTERGROWN,
             MICROPEGMATITE*

Alteration - CLAY MINERALS             ( 5-10%)
             Location: SPOTS          Replacing: PLAG

             CHLORITE                  (    3%)
             Location: INTERSTITIAL




Leg : 61    Top/Bottom Interval(mm): 1100/1120  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   711.00   Rock Type: IGNEOUS
Core:  41   Sample Midpoint(m)     :   713.61   Sect/Pc #:  2/PCE 1C

ROCK = DOLERITE
       MASSIVE DOLERITE SILL;
       Texture: SUBOPHITIC-INTERSERTAL;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   10%)
             Size(mm):        0.4  Morphology: ACICULAR,SUBHEDRAL
             APPROX COMP AN60-65,2 TYPES (EITHER ACICULAR OR
             SUBHEDRAL);

             CLINOPYROXENE             (   10%)
             Size(mm):        0.4

Groundmass - PLAGIOCLASE
             Size(mm):       <0.3  Morphology: SUBHEDRAL-ANHEDRAL
             MICROLITES;

             CLINOPYROXENE
             Size(mm):       <0.3  Morphology: SUBHEDRAL
             MICROLITES;

             MAGNETITE                 (  4-5%)
             Size(mm):       <0.2  Morphology: ANGULAR
             CLOSELY ASSOCIATED WITH ALTERED PART;

             COMBINATION               (   TR%)
             INCLUDES QUARTZ + ALK.SPAR,INTERGROWN,
             MICROPEGMATITE;

             HORNBLENDE
             GREEN,OBSERVED AT MARGIN OF CPX*

Alteration - CLAY MINERALS             ( 5-10%)
             Location: SPOTS          Replacing: PLAG

             CHLORITE                  (  3-5%)




Leg : 61    Top/Bottom Interval(mm):  800/ 820  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   711.00   Rock Type: IGNEOUS
Core:  41   Sample Midpoint(m)     :   716.31   Sect/Pc #:  4/PCE 1C

ROCK = DOLERITE
       MASSIVE;
       Texture: SUBOPHITIC-INTERGRANULAR;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (  5-8%)
             Size(mm):    0.4-0.8  Morphology: SUBHEDRAL
             APPROX COMP AN60;

             CLINOPYROXENE             (  5-8%)
             Size(mm):        0.4  Morphology: SUBHEDRAL-ANHEDRAL

             MAGNETITE                 (    1%)
             Size(mm):    0.8-1.0  Morphology: SKELETAL
             TI-MAGN,COEXISTS WITH GREEN HBL*

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):       <0.3  Morphology: SUBHEDRAL
             MICROLITES;

             CLINOPYROXENE             (   40%)
             Size(mm):       <0.3  Morphology: SUBHEDRAL
             MICROLITES;

             MAGNETITE                 (  5-6%)
             Size(mm):       <0.3  Morphology: SKELETAL,DUST-LIKE
             SEEMS TO BE CLOSELY ASSOCIATED WITH ALTERED AREA
             (SECONDARY MINERAL);

             COMBINATION               (   TR%)
             INCLUDES QUARTZ + ALKALI FELDSPAR,INTERGROWTHS;

             HORNBLENDE
             GREEN*

Alteration - COMBINATION               ( 5-10%)
             Location: SPOTS          Replacing: PLAG
             INCLUDES CLAYS + ZEOLITES;

             CHLORITE                  (  3-5%)
             Location: SPOTS          Replacing: PLAG




Leg : 61    Top/Bottom Interval(mm):  780/ 800  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   711.00   Rock Type: IGNEOUS
Core:  41   Sample Midpoint(m)     :   717.79   Sect/Pc #:  5/PCE 1E

ROCK = DOLERITE
       MASSIVE;
       Texture: SUBOPHITIC-INTERGRANULAR;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (10-13%)
             Size(mm):    0.5-1.0  Morphology: SUBHEDRAL
             APPROX COMP AN55-60;

             CLINOPYROXENE             (   10%)
             Size(mm):    0.4-0.5  Morphology: SUBHEDRAL

             MAGNETITE                 (  1-2%)
             Size(mm):        0.4  Morphology: SKELETAL
             TI-MAGN*

Groundmass - PLAGIOCLASE               (   35%)
             Size(mm):       <0.4  Morphology: SUBHEDRAL
             MICROLITES;

             CLINOPYROXENE             (   35%)
             Size(mm):       <0.3  Morphology: SUBHEDRAL-ANHEDRAL
             MICROLITES;

             MAGNETITE                 (  5-8%)
             Size(mm):       <0.2

             COMBINATION               (   TR%)
             INCLUDES QUARTZ + ALK.SPAR,MICROPEGMATITE;

             HORNBLENDE                (   TR%)
             A TRACE OF BOTH GREEN AND BROWN HBL*

Alteration - CLAY MINERALS             (10-15%)
             Location: SPOTS          Replacing: PLAG

             CHLORITE                  (  3-5%)
             Location: SPOTS          Replacing: PLAG




Leg : 61    Top/Bottom Interval(mm):  900/ 920  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   711.00   Rock Type: IGNEOUS
Core:  41   Sample Midpoint(m)     :   719.41   Sect/Pc #:  6/PCE 1D

ROCK = DOLERITE;
       Texture: SUBOPHITIC-INTERGRANULAR;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (15-20%)
             Size(mm):    0.5-0.8  Morphology: SUBHEDRAL
             APPROX COMP AN65-70;

             CLINOPYROXENE             ( 8-10%)
             Size(mm):    0.5-0.7  Morphology: SUBHEDRAL

             MAGNETITE                 (  2-4%)
             Size(mm):        0.4  Morphology: SKELETAL
             TI-MAGN*

Groundmass - OLIVINE                   (  1-2%)
             Size(mm):        0.2

             PLAGIOCLASE               (   30%)
             Size(mm):       <0.4  Morphology: SUBHEDRAL
             MICROLITES;

             CLINOPYROXENE             (   30%)
             Size(mm):       <0.4  Morphology: SUBHEDRAL
             MICROLITES;

             MAGNETITE                 (  5-8%)
             Size(mm):       <0.2  Morphology: SKELETAL

             COMBINATION
             QUARTZ + ALK.SPAR, MICROPEGMATITE;

             APATITE                   (   TR%)

             HORNBLENDE                (   TR%)
             BROWN*

Alteration - COMBINATION               ( 5-10%)
             Location: SPOTS          Replacing: PLAG
             INCLUDES CLAYS + ZEOLITES;

             CHLORITE                  (  3-5%)
             Location: SPOTS          Replacing: PLAG,CPX




Leg : 61    Top/Bottom Interval(mm):  960/ 990  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   711.00   Rock Type: IGNEOUS
Core:  41   Sample Midpoint(m)     :   720.98   Sect/Pc #:  7/PCE 1F

ROCK = PLAG-OL-CPX MODERATELY PHYRIC BASALT;
       Texture: MODERATELY PORPHYRITIC,HYALOPILITIC;
       Where sampled: GLASSY MARGIN OF SILL*

Phenocrysts- OLIVINE                   (  1-2%)
             Size(mm):        0.2
             PSEUDOMORPH,MICROPHENOS;

             PLAGIOCLASE               (  3-5%)
             Size(mm):    0.5-1.5  Morphology: ACICULAR
             APPROX COMP AN65;

             CLINOPYROXENE             (    1%)
             Size(mm):        0.5  Morphology: SUBHEDRAL-EUHEDRAL

Groundmass - PLAGIOCLASE               (   20%)
             Size(mm):       <0.4  Morphology: ACICULAR
             PARTLY MICROLITES;

             CLINOPYROXENE             (10-15%)
             Size(mm):       <0.3  Morphology: SUBHEDRAL
             PARTLY MICROLITES;

             MAGNETITE                 (  5-6%)
             Size(mm):      <0.01  Morphology: DUST-LIKE
             SECONDARY MINERAL?;

             GLASS                     (   50%)
             ALTERED TO CLAY*

Alteration - COMBINATION               (35-40%)
             Location: INTERSTITIAL   Replacing: GLASS,CPX,PLAG
             INCLUDES CLAY.MINS+ZEOLITES*




Leg : 61    Top/Bottom Interval(mm):  370/ 390  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   729.00   Rock Type: IGNEOUS
Core:  44   Sample Midpoint(m)     :   729.38   Sect/Pc #:  1/PCE 3

ROCK = PLAG-OL-SPINEL MODERATELY MICROPHYRIC BASALT
       ALTERED;
       Texture: MODERATELY MICROPHYRIC,GLASSY-VARIOLITIC;
       Where sampled: GLASSY MARGIN*

Phenocrysts- OLIVINE                   (    2%)
             Size(mm):    0.1-0.6
             MICROPHENOS,PSEUDOMORPHS AFTER ZEOLITE + CLAY +
             AMPH;

             PLAGIOCLASE               (    2%)
             Size(mm):    0.2-0.5
             MICROPHENOS,APPROX COMP AN65;

             SPINEL                    (   <1%)
             Size(mm):      <0.02
             MICROPHENOS,AS INCLUSIONS IN OL PSEUDOMORPHS*

Groundmass - PLAGIOCLASE               (    3%)
             Size(mm):      <0.05  Morphology: SKELETAL
             SMALL XTLS + MICROLITES + CRYSTALLITES;

             MAGNETITE                 (    3%)
             Size(mm):      0.002  Morphology: DUST-LIKE
             FINE TI-MAGN;

             GLASS                     (   90%)
             VARIOLITIC AND SPHERULITIC TEXTURE*

Alteration - AMPHIBOLE
             Replacing: OL
             BROWN PLEOCHROIC AND FIBROUS;

             CLAY MINERALS
             Replacing: GLASS,OL,PLAG
             PERCENTAGE VARIABLE;

             ZEOLITE
             Location: GROUNDMASS,    Replacing: OL,PLAG
             Location: VEINS
             PERCENTAGE VARIABLE*




Leg : 61    Top/Bottom Interval(mm): 1280/1300  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   729.00   Rock Type: IGNEOUS
Core:  44   Sample Midpoint(m)     :   730.29   Sect/Pc #:  1/PCE 8

ROCK = PLAG-OL-CPX-SPINEL MODERATELY MICROPHYRIC BASALT;
       Texture: MODERATELY MICROPHYRIC,FINE GRAINED,
       HYALOPILITIC-INTERSERTAL;
       Where sampled: PILLOW/SILL INTERIOR*

Phenocrysts- OLIVINE                   (    3%)
             Size(mm):    0.2-0.5
             MICROPHENOS,PSEUDOMORPHS (CLAY ET AL)*

             PLAGIOCLASE               (    4%)
             Size(mm):    0.1-0.4
             MICROPHENOS,APPROX COMP AN58 ZONED TO AN30;

             CLINOPYROXENE             (    1%)
             Size(mm):      <0.05
             MICROPHENOS,AUGITE,2VZ 50;

             SPINEL                    (   <1%)
             Size(mm):       0.03
             MICROPHENOS,PICOTITE?,INCLUSIONS IN OL
             PSEUDOMORPHS*

Groundmass - PLAGIOCLASE               (   27%)
             QUENCH MICROLITES + CRYSTALLITES + ETC.;

             CLINOPYROXENE             (   50%)
             QUENCH XTLS IN GROUNDMASS;

             MAGNETITE
             Size(mm):     <.0125
             TI-MAGN*

Alteration - QUARTZ                    (   .1%)
             Location: GROUNDMASS     Replacing: GROUNDMASS

             AMPHIBOLE
             Replacing: OL
             BROWN PLEOCHROIC AND FIBROUS,PERCENTAGE VARIABLE;

             CLAY MINERALS             (   15%)
             Location: VEIN           Replacing: GLASS,OL,PLAG

             ZEOLITE
             Location: GROUNDMASS     Replacing: OL,PLAG,GROUNDMASS




Leg : 61    Top/Bottom Interval(mm):  270/ 300  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   729.00   Rock Type: IGNEOUS
Core:  44   Sample Midpoint(m)     :   730.78   Sect/Pc #:  2/PCE 3

ROCK = OL-PLAG-SPINEL MODERATELY MICROPHYRIC BASALT
       ALTERED;
       Texture: MODERATELY MICROPHYRIC,GLASSY-VARIOLITIC;
       Where sampled: GLASSY MARGIN*

Phenocrysts- PLAGIOCLASE               (    5%)
             Size(mm):       0.01  Morphology: SKELETAL

             OLIVINE                   (    3%)
             Size(mm):    0.2-0.4  Morphology: EUHEDRAL
             MICROPHENOS,PSEUDOMORPHS;
             CRYSTALS AND CRYSTALLITES;

             PLAGIOCLASE               (    2%)
             Size(mm):    0.2-0.5  Morphology: EUHEDRAL

             MAGNETITE
             Size(mm):     <0.002  Morphology: DUST-LIKE
             IN VARIOLITIC ZONE;
             MICROPHENOS,APPROX COMP AN80;

             SPINEL                    (   <1%)
             Size(mm):      <0.03

             GLASS                     (   90%)
             VARIOLITIC AND NON-VARIOLITIC TEXTURED,MOSTLY
             INCLUSIONS IN OL PSEUDOMORPHS*
             REPLACED BY SMEC + ZEOLITE ET AL*

Alteration - AMPHIBOLE
             Replacing: OL
             REPLACING CORES OF OL GRAINS,BROWN PLEOCHROIC AND
             FIBROUS,PERCENTAGE VARIABLE;

             CLAY MINERALS
             Replacing: GLASS,OL
             BROWN,PERCENTAGE VARIABLE;

             ZEOLITE
             Location: VEINS          Replacing: GLASS,PLAG
             PERCENTAGE VARIABLE*




Leg : 61    Top/Bottom Interval(mm):  530/ 560  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   729.00   Rock Type: IGNEOUS
Core:  44   Sample Midpoint(m)     :   731.05   Sect/Pc #:  2/PCE 6

ROCK = CPX-PLAG-OL MODERATELY MICROPHYRIC BASALT;
       Texture: MODERATELY MICROPHYRIC,FINE GRAINED,INTERSERTAL;
       Where sampled: PILLOW/SILL INTERIOR*

Phenocrysts- OLIVINE                   (   <1%)
             Size(mm):       <0.2
             MICROPHENOS,PSEUDOMORPHS AFTER CLAY;

             PLAGIOCLASE               (    2%)
             Size(mm):       <0.3
             MICROPHENOS,APPROX COMP AN73-75,PATCHY
             DISTRIBUTION;

             CLINOPYROXENE             (    3%)
             Size(mm):       <0.1
             MICROPHENOS,AUGITE,SECTOR ZONED;

             SPINEL                    (   TR%)
             Size(mm):      <0.03
             INCLUSIONS IN OL PSEUDOMORPHS*

Groundmass - PLAGIOCLASE               (   30%)
             Size(mm):     TO 0.5  Morphology: SKELETAL LATHS
             BELT BUCKLE TEXTURED;

             CLINOPYROXENE             (   55%)
             Morphology: SPRAYS
             MICROLITES AND QUENCH TEXTURED SPRAYS;

             MAGNETITE                 (   10%)
             Size(mm):      <0.02  Morphology: DUST-LIKE
             TI-MAGN*

Alteration - CLAY MINERALS             ( 5-10%)
             Replacing: CPX,PLAG,OL
             REPLACING QUENCH CPX + PLAG,PSEUDOMORPHS AFTER OL;

             CHLORITE                  (   TR%)
             Location: GROUNDMASS     Replacing: PLAG,GROUNDMASS




Leg : 61    Top/Bottom Interval(mm): 1060/1080  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   729.00   Rock Type: IGNEOUS
Core:  44   Sample Midpoint(m)     :   731.57   Sect/Pc #:  2/PCE 8

ROCK = PLAG-OL MODERATELY MICROPHYRIC BASALT
       ALTERED;
       Where sampled: PILLOW INTERIOR*

Phenocrysts- OLIVINE                   (    1%)
             Size(mm):    0.1-0.2
             PSEUDOMORPHS AFTER CLAY (BROWN),MICROPHENOS;

             PLAGIOCLASE               (    5%)
             Size(mm):     TO 0.5  Morphology: SKELETAL,EUHEDRAL
             APPROX COMP AN75,MICROPHENOS;

             SPINEL                    (   TR%)
             Size(mm):      <0.03
             INCLUSIONS IN OL PSEUDOMORPHS,MICROPHENOS*

Groundmass - PLAGIOCLASE               (   30%)
             VERY FINE QUENCH TEXTURE;

             CLINOPYROXENE             (   43%)
             VERY FINE QUENCH TEXTURE;

             MAGNETITE                 (   15%)
             Size(mm):      <0.02
             TI-MAGN;

             GLASS                     ( 5-10%)
             MOSTLY REPLACED BY CLAY MINS*

Alteration - CLAY MINERALS             (   15%)
             Location: GROUNDMASS     Replacing: GLASS,OL,XTLS
             BROWN  PSEUDOMORPHS AFTER OL;

             ZEOLITE                   (    5%)
             Location: GROUNDMASS,    Replacing: GLASS
             Location: VEINS

             CHLORITE                  (    1%)
             Replacing: PLAG MICROPHENOS




Leg : 61    Top/Bottom Interval(mm):  120/ 140  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   733.00   Rock Type: IGNEOUS
Core:  45   Sample Midpoint(m)     :   733.13   Sect/Pc #:  1/PCE 1A

ROCK = PLAG-CPX MODERATELY MICROPHYRIC BASALT
       MASSIVE;
       Texture: MODERATELY MICROPHYRIC,FINE GRAINED,SPINIFEX
       Piece #: HYRY;
       Where sampled: SILL INTERIOR BELOW PILLOW COMPLEX*

Phenocrysts- PLAGIOCLASE               (    4%)
             Size(mm):       <0.2
             CLAY-AMPH PSEUDOMORPHS,MICROPHENOS;

             CLINOPYROXENE             (   <1%)
             Size(mm):        0.5
             AUGITE,A SINGLE LARGE PHENO;

             SPINEL                    (   TR%)
             Size(mm):      <0.02
             INCLUSIONS IN OL PSEUDOMORPHS*

Groundmass - PLAGIOCLASE               (   12%)
             Morphology: SKELETAL,ACICULAR LATHS
             APPROX COMP AN70,1.0 MM LONG;

             CLINOPYROXENE             (   59%)
             Morphology: SPRAYS
             SPINIFEX TEXTURED SPRAYS IN GROUNDMASS;

             MAGNETITE                 (   15%)
             Size(mm):      <0.02
             TI-MAGN*

Alteration - CARBONATE                 (   <1%)
             Location: VUGS           Replacing: GROUNDMASS
             IN VUGS REPLACING GROUNDMASS*

             CLAY MINERALS             (   10%)
             Location: GROUNDMASS     Replacing: OL
             BROWN*

Vesicles   -
             Percent:    <1
             Filling: CALCITE
             MAY BE SMALL VESICLES FILLED WITH CALCITE*




Leg : 61    Top/Bottom Interval(mm):  140/ 170  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   733.00   Rock Type: IGNEOUS
Core:  45   Sample Midpoint(m)     :   734.66   Sect/Pc #:  2/PCE 2A

ROCK = OL-PLAG MODERATELY MICROPHYRIC BASALT;
       Texture: MODERATELY MICROPHYRIC,FINE GRAINED,SPINIFEX,
       SPHERULITIC;
       Where sampled: BELOW PILLOW PART IN SILL INTERIOR*

Phenocrysts- OLIVINE                   (    5%)
             Size(mm):    0.3-0.5
             PSEUDOMORPHS AFTER CLAY,MICROPHENOS;

             PLAGIOCLASE               (    4%)
             Size(mm):    0.2-0.5
             APPROX COMP AN72-75,MICROPHENOS*

Groundmass - PLAGIOCLASE               (   15%)
             Morphology: SKELETAL,ACICULAR
             0.5 MM LONG,APPROX COMP AN72-75;

             CLINOPYROXENE             (   61%)
             Morphology: SPRAYS,NEEDLES
             QUENCH TEXTURED;

             MAGNETITE                 (   10%)
             Size(mm):     <0.005  Morphology: DUST-LIKE
             TI-MAGN*

Alteration - AMPHIBOLE
             Replacing: OL
             REPLACING CORES OF OL XTLS;

             CLAY MINERALS             (    5%)
             Replacing: CPX,OL MICROPHENOS
             BROWN,PSEUDOMORPHS AFTER OL,REPLACING QUENCH CPX
             ET AL;

             CHLORITE                  (   TR%)




Leg : 61    Top/Bottom Interval(mm):  610/ 630  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   733.00   Rock Type: IGNEOUS
Core:  45   Sample Midpoint(m)     :   735.12   Sect/Pc #:  2/PCE 2E

ROCK = APHYRIC BASALT;
       Texture: APHYRIC,FINE GRAINED,EQUIGRANULAR;
       Where sampled: SILL INTERIOR*

Phenocrysts- OLIVINE                   (   TR%)
             UNCLEAR PSEUDOMORPHS;

             PLAGIOCLASE               (   TR%)
             Size(mm):       <0.5  Morphology: SUBHEDRAL
             CORRODED,APPROX COMP AN70,MICROPHENOS*

Groundmass - PLAGIOCLASE               (   30%)
             Size(mm):       <0.3  Morphology: LONG ACICULAR LATHS

             CLINOPYROXENE             (   50%)
             Size(mm):       <0.1
             AUGITE;

             MAGNETITE                 (   10%)
             Size(mm):       <0.1
             TI-MAGN*

Alteration - AMPHIBOLE                 (   TR%)

             CLAY MINERALS             (   10%)
             Replacing: CPX
             BROWN*

             CHLORITE                  (   TR%)
             Replacing: OL
             REPLACING OL?*




Leg : 61    Top/Bottom Interval(mm): 1220/1240  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   733.00   Rock Type: IGNEOUS
Core:  45   Sample Midpoint(m)     :   735.73   Sect/Pc #:  2/PCE 4

ROCK = PLAG-OL MODERATELY MICROPHYRIC BASALT;
       Texture: MODERATELY MICROPHYRIC,FINE GRAINED,
       SPINIFEX-LIKE,INTERGRANULAR;
       Where sampled: SILL INTERIOR*

Phenocrysts- OLIVINE                   (    3%)
             Size(mm):       <0.5
             PSEUDOMORPHS OF CLAY + AMPH,MICROPHENOS;

             PLAGIOCLASE               (    3%)
             Size(mm):       <0.4  Morphology: EUHEDRAL
             APPROX COMP AN75,OSCILLATORY ZONING,MICROPHENOS;

             SPINEL                    (   TR%)
             Size(mm):     <0.003
             INCLUSIONS IN OL,MICROPHENOS*

Groundmass - PLAGIOCLASE               (   15%)
             Size(mm):       <0.5  Morphology: ACICULAR LATHS,SKELETAL XTLS
             APPROX COMP AN75;

             CLINOPYROXENE             (   64%)
             Morphology: GRANULES,SPRAYS
             TINY SPINIFEX-LIKE GRANULES AND SPRAYS;

             MAGNETITE                 (   10%)
             Size(mm):      <0.04  Morphology: DUST-LIKE
             TI-MAGN*

Alteration - AMPHIBOLE
             Replacing: OL
             BROWN,PSEUDOMORPHS AFTER OL;

             CLAY MINERALS             (    5%)
             Replacing: PYX,OL
             BROWN,PSEUDOMORPHS AFTER OL*




Leg : 61    Top/Bottom Interval(mm):  500/ 520  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   733.00   Rock Type: IGNEOUS
Core:  45   Sample Midpoint(m)     :   736.51   Sect/Pc #:  3/PCE 1D

ROCK = PLAG-OL MODERATELY MICROPHYRIC BASALT
       ALTERED;
       Texture: MODERATELY MICROPHYRIC,FINE GRAINED,
       EQUIGRANULAR;
       Where sampled: SILL INTERIOR*

Phenocrysts- OLIVINE                   (    2%)
             Size(mm):    0.3-0.5
             PSEUDOMORPHS OF BROWN CLAY,MICROPHENOS;

             PLAGIOCLASE               (    2%)
             Size(mm):    0.2-0.4
             CORRODED,APPROX COMP AN65?,MICROPHENOS;

             SPINEL                    (   TR%)
             Size(mm):     <0.003
             SMALL INCLUSIONS IN OL,MICROPHENOS*

Groundmass - PLAGIOCLASE               (   25%)
             Size(mm):       <0.2  Morphology: TABULAR,SKELETAL LATHS
             APPROX COMP AN68;

             CLINOPYROXENE             (   51%)
             Size(mm):       <0.1  Morphology: GRANULAR
             QUENCH;

             MAGNETITE                 (    5%)
             Size(mm):      <0.04  Morphology: EUHEDRAL
             TI-MAGN*

Alteration - CLAY MINERALS             (   15%)
             Location: PATCHES        Replacing: ROCK
             BROWN*

Vesicles   -
             Size(mm):      0.4
             Percent:    <1
             Filling: EMPTY
             Shape: EGG-SHAPE
             ONE VESICLE 0.4 MM IN DIAMETER*




Leg : 61    Top/Bottom Interval(mm):  200/ 220  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   738.00   Rock Type: IGNEOUS
Core:  46   Sample Midpoint(m)     :   738.21   Sect/Pc #:  1/PCE 1A

ROCK = OL-PLAG MODERATELY MICROPHYRIC BASALT;
       Texture: MODERATELY MICROPHYRIC,FINE GRAINED,
       EQUIGRANULAR;
       Where sampled: SILL INTERIOR*

Phenocrysts- OLIVINE                   (    3%)
             Size(mm):    0.3-0.5
             PSEUDOMORPHS OF BROWN CLAY,MICROPHENOS;

             PLAGIOCLASE               (    2%)
             Size(mm):    0.2-0.8  Morphology: EUHEDRAL
             CORRODED,APPROX COMP AN68;

             SPINEL                    (   TR%)
             Size(mm):     <0.003
             INCLUSIONS IN OL,MICROPHENOS*

Groundmass - PLAGIOCLASE               (   25%)
             Size(mm):    0.1-0.5  Morphology: BLADED,SKELETAL LATHS
             APPROX COMP AN70;

             CLINOPYROXENE             (   45%)
             Size(mm):       <0.2  Morphology: GRANULAR
             AUGITE,QUENCH;

             MAGNETITE                 (   10%)
             Size(mm):      <0.04
             TI-MAGN*

Alteration - CLAY MINERALS             (   15%)
             Replacing: CPX,PLAG,OL MICROPHENOS
             BROWN,PSEUDOMORPHS AFTER OL*




Leg : 61    Top/Bottom Interval(mm):  780/ 800  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   738.00   Rock Type: IGNEOUS
Core:  46   Sample Midpoint(m)     :   740.29   Sect/Pc #:  2/PCE 3A

ROCK = PLAG-OL MICROPHYRIC BASALT;
       Texture: MICROPHYRIC,FINE GRAINED,EQUIGRANULAR;
       Where sampled: SILL INTERIOR*

Phenocrysts- OLIVINE                   (    5%)
             Size(mm):    0.2-0.4
             MICROPHENOS,RELECTS,PARTLY PSEUDOMORPHED BY CLAY,
             SOME FRESH;

             PLAGIOCLASE               (   10%)
             Size(mm):    0.3-0.6
             APPROX COMP AN65;

             SPINEL                    (   TR%)
             Size(mm):      0.003
             INCLUSIONS IN OL,MICROPHENOS*

Groundmass - PLAGIOCLASE               (   20%)
             Size(mm):     TO 1.0  Morphology: LATHS
             APPROX COMP AN65-70;

             CLINOPYROXENE             (   40%)
             Size(mm):       <0.1  Morphology: GRANULAR
             AUGITE;

             MAGNETITE                 (   10%)
             Size(mm):      <0.08
             TI-MAGN*

Alteration - CLAY MINERALS             (   15%)
             Replacing: CPX,OL MICROPHENOS
             BROWN,PSEUDOMORPHS AFTER OL (SOME OL STILL FRESH),
             REPLACING CPX ETC*




Leg : 61    Top/Bottom Interval(mm): 1110/1140  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   738.00   Rock Type: IGNEOUS
Core:  46   Sample Midpoint(m)     :   743.63   Sect/Pc #:  4/PCE 2B

ROCK = OL-CPX-PLAG MICROPHYRIC BASALT;
       Texture: MICROPHYRIC,MIXED INTERSERTAL AND INTERGRANULAR;
       Where sampled: SILL INTERIOR*

Phenocrysts- OLIVINE                   (   10%)
             Size(mm):    0.3-0.5
             BROWN CLAY,MICROPHENOS;

             PLAGIOCLASE               (    2%)
             Size(mm):    0.2-0.4
             APPROX COMP AN75,MICROPHENOS;

             CLINOPYROXENE             (    5%)
             Size(mm):    0.1-0.2
             AUGITE,MICROPHENOS;

             SPINEL                    (   TR%)
             Size(mm):     <0.003
             INCLUSIONS IN OL PSEUDOMORPHS,MICROPHENOS*

Groundmass - PLAGIOCLASE               (   25%)
             Size(mm):    0.2-0.4  Morphology: SUBHEDRAL,LATHS
             APPROX COMP AN70;

             CLINOPYROXENE             (   35%)
             Size(mm):    0.1-0.2  Morphology: GRANULAR,SUBHEDRAL
             AUGITE;

             MAGNETITE                 (    8%)
             Size(mm):       0.08
             TI-MAGN*

Alteration - CLAY MINERALS             (   15%)
             Location: PATCHES,VEINS  Replacing: OL MICROPHENOS
             BROWN,PSEUDOMORPHS AFTER OL,THE ROCK IN GENERAL
             IS REPLACED*




Leg : 61    Top/Bottom Interval(mm):  900/ 920  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   738.00   Rock Type: IGNEOUS
Core:  46   Sample Midpoint(m)     :   744.91   Sect/Pc #:  5/PCE 4

ROCK = OL-PLAG MODERATELY MICROPHYRIC BASALT;
       Texture: MODERATELY MICROPHYRIC,FINE GRAINED,MIXED
       HYALOPILITIC AND INTERSERTAL;
       Where sampled: SILL MARGINAL ZONE*

Phenocrysts- OLIVINE                   (    4%)
             Size(mm):    0.1-0.2
             CLAY PSEUDOMORPHS,MICROPHENOS;

             PLAGIOCLASE               (    3%)
             Size(mm):    0.2-0.3  Morphology: SUBHEDRAL
             APPROX COMP AN70,MICROPHENOS;

             SPINEL                    (   TR%)
             Size(mm):      <0.02
             INCLUSIONS IN OL PSEUDOMORPHS,MICROPHENOS*

Groundmass - PLAGIOCLASE               (   15%)
             Size(mm):    0.3-0.5  Morphology: THIN ACICULAR LATHS
             APPROX COMP AN70;

             CLINOPYROXENE             (   68%)
             Morphology: GRANULES
             QUENCH AND VERY FINE GRANULES;

             MAGNETITE                 (   10%)
             Size(mm):      <0.01
             TI-MAGN;

             GLASS                     (    5%)
             ALTERED TO SMEC*

Alteration - AMPHIBOLE
             Replacing: OL
             BROWN;

             CLAY MINERALS             (    5%)
             Replacing: CPX,PLAG,GLASS,OL
             BROWN,PSEUDOMORPHS AFTER OL*




Leg : 61    Top/Bottom Interval(mm):  880/ 900  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   747.00   Rock Type: IGNEOUS
Core:  47   Sample Midpoint(m)     :   747.89   Sect/Pc #:  1/PCE 8

ROCK = APHYRIC BASALT
       CONTACT BETWEEN VARIOLITIC BASALT AND GLASSY
       BASALT;
       Texture: APHYRIC,VARIOLITIC,VITROPHYRIC;
       Where sampled: GLASSY MARGIN*

Phenocrysts- OLIVINE                   (   TR%)
             Morphology: EUHEDRAL
             ALTERED TO ORANGE-BROWN CLAY IN GLASS,FRESH,
             AVERAGE SIZE= 0.7 MM;

             PLAGIOCLASE               (   TR%)

Groundmass - OLIVINE                   (   TR%)
             Size(mm):       0.04  Morphology: EQUIDIMENSIONAL
             ONLY IN GLASS;

             PLAGIOCLASE               (    5%)
             Size(mm):      <0.01  Morphology: LATHS
             LATHS SHOW DISTINCT ALIGNMENT SUBPARALLEL TO
             CONTACT;

             MAGNETITE                 (    0%)

             GLASS                     (   95%)
             ALTERED MESOSTASIS*

Alteration - CLAY MINERALS             (   TR%)
             Replacing: OL
             ORANGE-BROWN;

             CLAY MINERALS             (   95%)
             Location: MESOSTASIS
             REDDISH BROWN PALAGONITE*




Leg : 61    Top/Bottom Interval(mm):  980/1000  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   747.00   Rock Type: IGNEOUS
Core:  47   Sample Midpoint(m)     :   749.49   Sect/Pc #:  2/PCE 3

ROCK = MICRODOLERITE
       MORE COARSE GRAINED THAN PREVIOUS THIN SECTION;
       Texture: MICRODOLERITIC,SPINIFEX;
       Where sampled: PILLOW INTERIOR*

Phenocrysts- OLIVINE                   (    5%)
             Size(mm):   0.04-0.1  Morphology: SUBHEDRAL
             CLAY PSEUDOMORPHS;

             PLAGIOCLASE               (   25%)
             AVERAGE LENGTH= 0.2 MM,SMALL MICROLITES;

             CLINOPYROXENE             (   63%)
             Size(mm):      <0.04
             SPINIFEX AGGREGATES;

             MAGNETITE                 (    7%)
             Morphology: DUST-LIKE

Alteration - CLAY MINERALS             (    5%)
             Replacing: OL
             GREENISH BROWN PSEUDOMORPHS AFTER OL*




Leg : 61    Top/Bottom Interval(mm): 1000/1020  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   756.00   Rock Type: IGNEOUS
Core:  48   Sample Midpoint(m)     :   757.01   Sect/Pc #:  1/PCE 3B

ROCK = MICRODOLERITE
       MORE FINE GRAINED THAN PREVIOUS;
       Texture: MICRODOLERITIC WITH VARIOLITIC SPOTS;
       Where sampled: NEXT TO GLASSY MARGIN*

Groundmass - OLIVINE                   (    3%)
             Size(mm):    0.1-0.3

             PLAGIOCLASE               (   49%)
             AVERAGE LENGTH= 0.3 MM,SMALL MICROLITES,OFTEN
             CHAINS OF ORIENTED MICROLITES;

             CLINOPYROXENE             (   38%)
             Size(mm):       0.04  Morphology: INTERGRANULAR
             SPINIFEX-LIKE;

             MAGNETITE                 (    7%)
             Morphology: DUST-LIKE

Alteration - CALCITE                   (   <1%)
             Location: VUGS

             CLAY MINERALS             (   10%)
             Location: VUGS           Replacing: OL
             PSEUDOMORPHS*

Vesicles   -
             Size(mm):      1-4
             Percent:     5
             Location: GROUNDMASS
             Filling: CLAY.MIN,
             Shape: IRREGULAR

             Filling: CALCITE
             VUGS*




Leg : 61    Top/Bottom Interval(mm): 1160/1180  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   756.00   Rock Type: IGNEOUS
Core:  48   Sample Midpoint(m)     :   757.17   Sect/Pc #:  1/PCE 3C

ROCK = BASALT TO MICRODOLERITE
       CONTACT OF VARIOLITIC BASALT AND SPINIFEX
       MICRODOLERITE,THIN MICRODOLERITIC VEINS PENETRATE
       TO THE VARIOLITIC ROCK;
       Texture: VARIOLITIC,MICRODOLERITIC*

Groundmass - OLIVINE                   (   TR%)
             IN BASALT;

             OLIVINE                   (    2%)
             IN MICRODOLERITE;

             PLAGIOCLASE               (    2%)
             IN BASALT;

             PLAGIOCLASE               (   40%)
             IN MICRODOLERITE;

             CLINOPYROXENE             (    0%)
             IN BASALT;

             CLINOPYROXENE             (   49%)
             IN MICRODOLERITE,SPINIFEX AGGREGATES;

             MAGNETITE                 (    0%)
             IN BASALT;

             MAGNETITE                 (    7%)
             IN MICRODOLERITE;

             GLASS                     (   98%)
             IN BASALT;

             GLASS                     (    2%)
             IN MICRODOLERITE*

Alteration - CLAY MINERALS             (   98%)
             VARIOLITIC BASALT;

             CLAY MINERALS             (    7%)
             MICRODOLERITE*




Leg : 61    Top/Bottom Interval(mm): 1140/1160  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   756.00   Rock Type: IGNEOUS
Core:  48   Sample Midpoint(m)     :   760.15   Sect/Pc #:  3/PCE 3D

ROCK = OL MODERATELY MICROPHYRIC BASALT;
       Texture: MODERATELY MICROPHYRIC,VARIOLITIC;
       Where sampled: NEXT TO GLASSY MARGIN*

Phenocrysts- OLIVINE                   (    3%)
             Size(mm):    0.1-0.6  Morphology: EUHEDRAL
             CLAY PSEUDOMORPHS,MICROPHENOS;

             PLAGIOCLASE               (   TR%)
             Morphology: ELONGATE PRISMS

Groundmass - PLAGIOCLASE               (    3%)
             Morphology: LATHS
             SLIGHTLY ALIGNED;

             CLINOPYROXENE             (    0%)

             MAGNETITE                 (    5%)
             Size(mm):      <0.02  Morphology: DUST-LIKE,THIN CHAINS
             DUST-LIKE THIN CHAINS ARE COMMON;

             GLASS                     (   90%)

             SULFIDES                  (   TR%)
             Size(mm):        0.2
             INTERSPHERULITE FILLING*

Alteration - CLAY MINERALS             (   92%)
             Location: MESOSTASIS     Replacing: GLASS,OL MICROPHENOS
             REDDISH BROWN PALAGONITE,PSEUDOMORPHS AFTER OL*




Leg : 61    Top/Bottom Interval(mm):  520/ 540  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   756.00   Rock Type: IGNEOUS
Core:  48   Sample Midpoint(m)     :   761.03   Sect/Pc #:  4/PCE 2D

ROCK = MICRODOLERITE
       MORE COARSE GRAINED THAN PREVIOUS,WITHOUT GLASS;
       Texture: MICRODOLERITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- OLIVINE                   (    2%)
             Morphology: EUHEDRAL
             AVERAGE SIZE= 0.2 MM,MICROPHENOS,CLAY
             PSEUDOMORPHS;

             PLAGIOCLASE               (   TR%)

Groundmass - PLAGIOCLASE               (   32%)
             AVERAGE LENGTH= 0.4 MM,APPROX COMP AN62,
             MICROLITES;

             CLINOPYROXENE             (   61%)
             Size(mm):  0.02-0.04
             SPINIFEX-LIKE AGGREGATES;

             MAGNETITE                 (    5%)
             Size(mm):  0.02-0.05  Morphology: DUST-LIKE

             GLASS                     (    0%)

Alteration - CLAY MINERALS             (    2%)
             Replacing: OL MICROPHENOS
             PSEUDOMORPHS AFTER OL*




Leg : 61    Top/Bottom Interval(mm):  720/ 740  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   756.00   Rock Type: IGNEOUS
Core:  48   Sample Midpoint(m)     :   761.23   Sect/Pc #:  4/PCE 2F

ROCK = OL SPARSELY MICROPHYRIC BASALT
       CONTACT BETWEEN FINE GRAINED AND MORE COARSE
       GRAINED VARIOLITIC BASALTS;
       Texture: VARIOLITIC;
       Where sampled: GLASSY MARGIN*

Phenocrysts- OLIVINE                   (    1%)
             Morphology: EUHEDRAL
             AVERAGE SIZE= 0.2 MM,MICROPHENOS,CLAY
             PSEUDOMORPHS,MICROPHENOS;

             PLAGIOCLASE               (   <1%)
             Morphology: ELONGATE PRISMS
             AVERAGE LENGTH= 0.8 MM,APPROX COMP AN62-82*

Groundmass - PLAGIOCLASE               (    2%)
             Size(mm):      <0.02  Morphology: LATHS
             SLIGHT ALIGNMENT;

             CLINOPYROXENE             (    0%)

             MAGNETITE                 (    0%)

             GLASS                     (   96%)
             ALTERED MESOSTASIS*

Alteration - CALCITE                   (   TR%)
             Location: VUGS

             CLAY MINERALS             (   96%)
             Location: MESOSTASIS     Replacing: GLASS,OL MICROPHENOS
             PALAGONITE,PSEUDOMORPHS AFTER OL*

Vesicles   -
             Percent:     1
             Location: ALONG CONTACT
             Filling: CLAY.MIN,
             Shape: IRREGULAR,

             Filling: CALCITE
             Shape: ELONGATE
             VUGS,0.4-1.0 MM LONG*




Leg : 61    Top/Bottom Interval(mm):  550/ 570  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   765.00   Rock Type: IGNEOUS
Core:  49   Sample Midpoint(m)     :   765.56   Sect/Pc #:  1/PCE 8A

ROCK = BASALT TO BASALTIC GLASS
       CONTACT BETWEEN GLASS AND VARIOLITIC BASALT;
       Texture: VITROPHYRIC,VARIOLITIC;
       Where sampled: GLASSY MARGIN*

Phenocrysts- OLIVINE                   (   TR%)
             Size(mm):    0.1-0.2  Morphology: EUHEDRAL
             IN GLASS,FRESH,MICROPHENOS;

             OLIVINE                   (    3%)
             Size(mm):    0.1-0.2  Morphology: EUHEDRAL
             IN BASALT,ALTERED,MICROPHENOS;

             PLAGIOCLASE               (    0%)
             IN GLASS;

             PLAGIOCLASE               (   TR%)
             IN BASALT;

             SPINEL
             Size(mm):      <0.02
             INCLUSIONS IN OL,MICROPHENOS*

Groundmass - PLAGIOCLASE               (    3%)
             Size(mm):      <0.02  Morphology: LATHS
             IN BASALT;

             CLINOPYROXENE             (    1%)
             Size(mm):      <0.02
             IN BASALT,SPINIFEX-LIKE,NUCLEAR AROUND PLAG
             MICROPHENOS;

             MAGNETITE                 (    0%)
             IN BASALT;

             GLASS                     (   99%)
             THIS IS THE VITROPHYRIC PART,FRESH,MESOSTASIS;

             GLASS                     (   93%)
             IN BASALT,ALTERED,MESOSTASIS*

Alteration - CLAY MINERALS             (   93%)
             Location: MESOSTASIS     Replacing: GLASS
             IN VARIOLITIC BASALT,PALAGONITE*




Leg : 61    Top/Bottom Interval(mm):  830/ 850  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   765.00   Rock Type: IGNEOUS
Core:  49   Sample Midpoint(m)     :   765.84   Sect/Pc #:  1/PCE 8D

ROCK = MICRODOLERITE;
       Texture: MICRODOLERITIC WITH SPINIFEX-LIKE SPOTS;
       Where sampled: SILL INTERIOR*

Groundmass - OLIVINE                   (    3%)
             Morphology: EUHEDRAL
             AVERAGE SIZE= 0.4 MM,CLAY PSEUDOMORPHS;

             PLAGIOCLASE               (   55%)
             AVERAGE LENGTH= 0.4 MM,SMALL MICROLITES;

             CLINOPYROXENE             (   38%)
             Morphology: EQUIDIMENSIONAL
             AVERAGE SIZE= 0.08 MM,SPINIFEX AGGREGATES;

             MAGNETITE                 (    4%)
             Size(mm):       0.02

Alteration - CLAY MINERALS             (    3%)
             Replacing: OL
             PSEUDOMORPHS AFTER OL*




Leg : 61    Top/Bottom Interval(mm):  700/ 720  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   765.00   Rock Type: IGNEOUS
Core:  49   Sample Midpoint(m)     :   768.71   Sect/Pc #:  3/PCE 4

ROCK = MICRODOLERITE
       MORE COARSE GRAINED THAN PREVIOUS;
       Texture: MICRODOLERITIC;
       Where sampled: SILL INTERIOR*

Groundmass - OLIVINE                   (    5%)
             Size(mm):    0.2-0.7  Morphology: EUHEDRAL
             DARK BROWN CLAY PSEUDOMORPHS;

             PLAGIOCLASE               (   45%)
             Morphology: COARSE,TABULAR
             AVERAGE LENGTH= 0.4 MM,APPROX COMP AN85,
             MICROLITES;

             CLINOPYROXENE             (   42%)
             Size(mm):    0.1-0.4  Morphology: INTERGRANULAR

             MAGNETITE                 (    8%)
             Size(mm):  0.04-0.12  Morphology: INTERGRANULAR

Alteration - CLAY MINERALS             (    5%)
             Replacing: OL
             DARK BROWN PSEUDOMORPHS AFTER OL*




Leg : 61    Top/Bottom Interval(mm):  410/ 430  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   765.00   Rock Type: IGNEOUS
Core:  49   Sample Midpoint(m)     :   769.92   Sect/Pc #:  4/PCE 2B

ROCK = MICRODOLERITE
       MORE FINE GRAINED THAN PREVIOUS WITH SPINIFEX
       SPOTS;
       Texture: MICRODOLERITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- OLIVINE                   (   TR%)
             Size(mm):    0.4-1.2  Morphology: EUHEDRAL
             CLAY PSEUDOMORPHS;

             PLAGIOCLASE               (   <1%)
             Morphology: TABULAR
             0.4-1.0 MM LONG,APPROX COMP AN76-87*

Groundmass - OLIVINE                   (    2%)
             Size(mm):    0.1-0.4  Morphology: ANHEDRAL
             ALTERED;

             PLAGIOCLASE               (   56%)
             AVERAGE LENGTH= 0.1 MM,APPROX COMP AN62,
             MICROLITES;

             CLINOPYROXENE             (   36%)
             Size(mm):   0.04-0.1  Morphology: INTERGRANULAR
             SPINIFEX AGGREGATES;

             MAGNETITE                 (    6%)
             Morphology: INTERGRANULAR
             AVERAGE SIZE= 0.06 MM*

Alteration - CARBONATE                 (   TR%)
             IN CLAY PSEUDOMORPHS AFTER OL;

             CLAY MINERALS             (    5%)
             Replacing: OL
             PSEUDOMORPHS AFTER OL*




Leg : 61    Top/Bottom Interval(mm):  710/ 730  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   774.00   Rock Type: IGNEOUS
Core:  50   Sample Midpoint(m)     :   776.22   Sect/Pc #:  2/PCE 1C

ROCK = DOLERITE;
       Texture: SUBOPHITIC;
       Where sampled: SILL INTERIOR*

Groundmass - PLAGIOCLASE               (   45%)
             Size(mm):    0.3-0.7
             APPROX COMP AN76;

             CLINOPYROXENE             (   45%)
             Size(mm):    0.5-0.8
             AUGITE;

             MAGNETITE                 (    5%)
             Size(mm):       <0.2
             TI-MAGN*

Alteration - CHLORITE                  (   \[%)
             Replacing: CPX

             CLAY MINERALS             (    5%)
             Replacing: CPX
             BROWN,REPLACING CPX ET AL*




Leg : 61    Top/Bottom Interval(mm):  150/ 170  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   774.00   Rock Type: IGNEOUS
Core:  50   Sample Midpoint(m)     :   777.16   Sect/Pc #:  3/PCE 1A

ROCK = DOLERITE;
       Texture: OPHITIC;
       Where sampled: SILL INTERIOR*

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):    0.5-0.8  Morphology: EUHEDRAL-ANHEDRAL
             APPROX COMP AN65;

             CLINOPYROXENE             (   43%)
             Size(mm):    0.6-0.9  Morphology: PLATES
             AUGITE,OPHITIC PLATES;

             MAGNETITE                 (   10%)
             Size(mm):      <0.25

             COMBINATION               (   TR%)
             INCLUDES QUARTZ + ALK.SPAR GRANOPHYRIC AGGREGATES;

             AMPHIBOLE                 (  2-3%)

Alteration - COMBINATION               (    5%)
             Replacing: ALL.MINS
             INCLUDES CLAY + CHLORITE,BROWN*




Leg : 61    Top/Bottom Interval(mm): 1090/1110  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   774.00   Rock Type: IGNEOUS
Core:  50   Sample Midpoint(m)     :   782.60   Sect/Pc #:  6/PCE 1K

ROCK = DOLERITE
       EXACTLY LIKE 50-3 (15-17) EXCEPT FOR MORE AMPH +
       MORE GRANOPHYRES + MORE CHLORITE + COARSER GRAIN
       SIZE;
       Texture: GRANOPHYRIC,OPHITIC;
       Where sampled: SILL INTERIOR*

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):    0.5-0.8  Morphology: EUHEDRAL+ANHEDRAL
             APPROX COMP AN65;

             CLINOPYROXENE             (   40%)
             Size(mm):    0.6-0.9  Morphology: PLATES
             AUGITE,OPHITIC PLATES;

             MAGNETITE                 (   10%)
             Size(mm):      <0.25

             COMBINATION               (    3%)
             INCLUDES QUARTZ + ALK.SPAR GRANOPHYRIC AGGREGATES;

             AMPHIBOLE                 (  2-3%)

             APATITE                   (   <1%)

Alteration - COMBINATION               (    5%)
             Replacing: ALL.MINS
             INCLUDES CLAY + CHLORITE (MORE CHLORITE THAN IN
             PREVIOUS THIN SECTION),BROWN*




Leg : 61    Top/Bottom Interval(mm):  200/ 220  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   778.50   Rock Type: IGNEOUS
Core:  51   Sample Midpoint(m)     :   778.71   Sect/Pc #:  1/PCE 1C

ROCK = MICRODOLERITE;
       Texture: MICRODOLERITIC;
       Where sampled: SILL INTERIOR*

Groundmass - OLIVINE                   (    2%)
             Morphology: EUHEDRAL,ANHEDRAL
             AVERAGE SIZE= 0.2 MM,ALTERED;

             PLAGIOCLASE               (   45%)
             APPROX COMP AN60-68,MICROLITES*

             CLINOPYROXENE             (   46%)
             Morphology: EQUIDIMENSIONAL,IRREGULAR
             AVERAGE SIZE= 0.2 MM,MORE COARSE;

             MAGNETITE                 (    7%)
             Morphology: INTERGRANULAR
             AVERAGE SIZE 0.1 MM;

             COMBINATION               (   TR%)
             Size(mm):       0.08  Morphology: INTERGRANULAR
             INCLUDES QUARTZ + ALK.SPAR IN GRANOPHYRIC AGGREGATE
             AND AS AUTONOMOUSE GRAINS;

             SULFIDE                   (   TR%)
             Size(mm):       0.15  Morphology: ELONGATE PLATES
             PROBABLY PYRITE*

Alteration - CLAY MINERALS             (    5%)
             Replacing: OL,PLAG
             GRAYISH GREEN,PSEUDOMORPHS AFTER OL?*




Leg : 61    Top/Bottom Interval(mm): 1470/1500  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   778.50   Rock Type: IGNEOUS
Core:  51   Sample Midpoint(m)     :   782.99   Sect/Pc #:  3/PCE 1L

ROCK = MICRODOLERITE TO BASALT
       GRADUAL TRANSITION FROM MICRODOLERITE TO A
       HORNFELSIC-LIKE ROCK;
       Texture: MICRODOLERITIC-EQUIGRANULAR (MOSAIC),QUENCH;
       Where sampled: GLASSY SILL BOTTOM*

Phenocrysts- OLIVINE                   (    1%)
             Morphology: EUHEDRAL
             IN BASALT,AVERAGE SIZE= 0.2 MM,MICROPHENOS,
             ALTERED;

             PLAGIOCLASE               (   TR%)
             IN BASALT,AVERAGE LENGTH= 0.4 MM,MICROPHENOS*

Groundmass - OLIVINE                   (    1%)
             Morphology: EUHEDRAL,IRREGULAR
             IN BASALT,AVERAGE SIZE= <0.04 MM;

             OLIVINE                   (    2%)
             Morphology: EUHEDRAL
             IN MICRODOLERITE,AVERAGE SIZE= 0.3 MM;

             PLAGIOCLASE               (   31%)
             Morphology: LATHS,EQUIDIMENSIONAL
             IN BASALT,AVERAGE LENGTH= <0.02 MM,SMALL
             MICROLITES;

             PLAGIOCLASE               (   55%)
             Morphology: LATHS,EQUIDIMENSIONAL
             IN MICRODOLERITE,AVERAGE LENGTH= 0.3 MM,SMALL
             MICROLITES;

             CLINOPYROXENE             (   60%)
             Morphology: EQUIDIMENSIONAL
             IN BASALT,AVERAGE SIZE= <0.02 MM,POIKILOPHITIC
             AGGREGATES;

             CLINOPYROXENE             (   38%)
             Morphology: EQUIDIMENSIONAL
             IN MICRODOLERITE,AVERAGE SIZE= 0.1 MM,
             POIKILOPHITIC AGGREGATES;

             MAGNETITE                 (    8%)
             Morphology: DUST-LIKE
             IN BASALT,AVERAGE SIZE= 0.04-0.12 MM;

             MAGNETITE                 (    5%)
             Morphology: DUST-LIKE
             IN MICRODOLORITE,AVERAGE SIZE= 0.04-0.12 MM;

             GLASS                     (    0%)
             IN BASALT;

             GLASS                     (    0%)
             IN MICRODOLORITE*

Alteration - CLAY MINERALS             (    5%)
             Replacing: OL
             GRAYISH GREENISH BROWN,PSEUDOMORPHS AFTER OL*




Leg : 61    Top/Bottom Interval(mm):   50/  70  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   778.50   Rock Type: IGNEOUS
Core:  51   Sample Midpoint(m)     :   783.06   Sect/Pc #:  4/PCE 1A

ROCK = MICRODOLERITE;
       Texture: MICRODOLERITIC;
       Where sampled: SILL BOTTOM*

Phenocrysts- OLIVINE                   (    2%)
             Size(mm):    0.2-0.5  Morphology: EUHEDRAL
             ALTERED,MICROPHENOS;

             PLAGIOCLASE               (   TR%)
             0.5 MM LONG*

Groundmass - OLIVINE                   (    1%)
             Size(mm):      <0.04  Morphology: IRREGULAR
             ALTERED;

             PLAGIOCLASE               (   40%)
             AVERAGE LENGTH= 0.16 MM,SMALL MICROLITES,DISTINCT
             ALIGNMENT IS OBSERVED;

             CLINOPYROXENE             (   54%)
             Morphology: EQUIDIMENSIONAL
             AVERAGE SIZE= 0.04 MM;

             MAGNETITE                 (    5%)
             Size(mm):      <0.04  Morphology: DUST-LIKE

Alteration - CLAY MINERALS             (    5%)
             Replacing: OL,PLAG
             PSEUDOMORPHS*




Leg : 61    Top/Bottom Interval(mm):  510/ 540  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   787.50   Rock Type: IGNEOUS
Core:  52   Sample Midpoint(m)     :   789.53   Sect/Pc #:  2/PCE 1

ROCK = DOLERITE
       ALTERED;
       Texture: DIABASIC;
       Where sampled: SILL INTERIOR*

Groundmass - OLIVINE                   (    5%)
             Size(mm):    0.2-0.3
             PSEUDOMORPHS (POSSIBLY COULD BE CPX PSEUDOMORPHS);

             PLAGIOCLASE               (   40%)
             Size(mm):    0.2-0.5  Morphology: SUBHEDRAL
             APPROX COMP AN65-68;

             CLINOPYROXENE             (   40%)
             Size(mm):    0.3-0.5
             AUGITE,OPHITIC TEXTURE;

             MAGNETITE                 (    5%)
             Size(mm):       0.04
             TI-MAGN*

Alteration - CLAY MINERALS             (   10%)
             Location: PATCHES        Replacing: OL
             GREEN CLAY PSEUDOMORPHS AFTER OL? OR IN VARIOLITIC
             INTERSTITIAL PATCHES*




Leg : 61    Top/Bottom Interval(mm):  490/ 510  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   787.50   Rock Type: IGNEOUS
Core:  52   Sample Midpoint(m)     :   792.50   Sect/Pc #:  4/PCE 2

ROCK = OL-PLAG MODERATELY PHYRIC BASALT;
       Texture: MODERATELY PORPHYRITIC,FINE GRAINED,
       HYALOPILITIC;
       Where sampled: NEAR CHILL ZONE OF PILLOW*

Phenocrysts- OLIVINE                   (    3%)
             Size(mm):    0.2-0.9
             ZEOLITE + CLAY + AMPH PSEUDOMORPHS;

             PLAGIOCLASE               (    1%)
             Size(mm):    0.3-0.8  Morphology: EUHEDRAL
             APPROX COMP AN70;

             SPINEL                    (   TR%)
             Size(mm):     <0.004
             INCLUSIONS IN OL PSEUDOMORPHS*

Groundmass - PLAGIOCLASE               (   10%)
             Size(mm):     TO 0.7  Morphology: THIN SKELETAL LATHS
             IN GROUNDMASS;

             CLINOPYROXENE             (   46%)
             QUENCH BUNDLES IN GROUNDMASS,MICROLITES;

             MAGNETITE                 (   10%)
             Size(mm):     <0.004  Morphology: DUST-LIKE
             TI-MAGN*

             GLASS                     (   30%)
             DEVITRIFIED AND/OR REPLACED BY BROWN CLAY*

Alteration - CLAY MINERALS             (    2%)
             Replacing: OL PHENOS
             PSEUDOMORPHS,GLASS IS DEVITRIFIED AND/OR REPLACED
             BY BROWN CLAY;

             ZEOLITE                   (    2%)
             Replacing: OL PHENOS
             PSEUDOMORPHS;

             OTHER
             Replacing: OL PHENOS
             AMPH OR HYDROMICA PSEUDOMORPHS*




Leg : 61    Top/Bottom Interval(mm):  690/ 710  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   801.00   Rock Type: IGNEOUS
Core:  55   Sample Midpoint(m)     :   801.70   Sect/Pc #:  1/PCE 6

ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
       Texture: MODERATELY PORPHYRITIC,VARIOLITIC-HYALOPILITIC,
       GLASSY-FINE GRAINED;
       Where sampled: GLASSY PILLOW MARGIN*

Phenocrysts- OLIVINE                   (    2%)
             Size(mm):    0.1-0.2
             CLAY + ZEOLITE PSEUDOMORPHS,MICROPHENOS;

             PLAGIOCLASE               (    2%)
             Size(mm):    0.2-0.9
             APPROX COMP AN75-70;

             SPINEL                    (   TR%)
             Size(mm):     <0.003
             INCLUSIONS IN OL PSEUDOMORPHS*

Groundmass - PLAGIOCLASE
             Morphology: SKELETAL
             VARIABLE PERCENTAGE,MICROLITES IN GROUNDMASS;

             CLINOPYROXENE
             VARIABLE PERCENTAGE,QUENCH TEXTURED BUNDLES IN
             GROUNDMASS;

             GLASS
             VARIABLE PERCENTAGE,VARIABLY DEVITRIFIED OR
             REPLACED BY CLAYS*

Alteration - CLAY MINERALS
             Replacing: PLAG,OL MICROPHENOS,GLASS
             PERCENTAGE VARIABLE,PSEUDOMORPHS AFTER OL,GLASS
             IS VARIOUSLY DEVITRIFIED OR REPLACED BY CLAYS;

             ZEOLITE
             Replacing: PLAG,OL MICROPHENOS,GLASS
             PERCENTAGE VARIABLE,PSEUDOMORPHS AFTER OL;

             CHLORITE
             Replacing: PLAG,OL MICROPHENOS,GLASS




Leg : 61    Top/Bottom Interval(mm):  650/ 680  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   806.50   Rock Type: IGNEOUS
Core:  56   Sample Midpoint(m)     :   807.17   Sect/Pc #:  1/PCE 6

ROCK = MICRODOLERITE
       WITH SPINIFEX SPOTS;
       Texture: MICRODOLERITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- OLIVINE                   (    5%)
             Morphology: EUHEDRAL
             AVERAGE SIZE= 0.3 MM,MICROPHENOS,ALTERED;

             PLAGIOCLASE               (   TR%)
             Morphology: ELONGATE PRISMS
             AVERAGE LENGTH= 0.4 MM,MICROPHENOS,APPROX COMP
             AN67;

             CLINOPYROXENE             (   TR%)
             Morphology: TABULAR
             AVERAGE SIZE= 0.3 MM,MICROPHENOS,POIKILITIC TABLES
             SURROUNDED BY FINE-MEDIUM GRAINED AGGREGATES*

Alteration - CLAY MINERALS             (    5%)
             Replacing: OL MICROPHENOS
             PSEUDOMORPHS AFTER OL*




Leg : 61    Top/Bottom Interval(mm): 1450/1470  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   806.50   Rock Type: IGNEOUS
Core:  56   Sample Midpoint(m)     :   807.96   Sect/Pc #:  1/PCE 4L

ROCK = APHYRIC BASALT;
       Texture: APHYRIC,VARIOLITIC-INTERSERTAL;
       Where sampled: GLASSY SILL BOTTOM*

Groundmass - OLIVINE                   (    1%)
             AVERAGE SIZE= 0.1 MM,GLOMEROPORPHYRITIC CLUSTERS;

             PLAGIOCLASE               (    5%)
             Size(mm):      <0.02  Morphology: LATHS

             CLINOPYROXENE             (   TR%)

             MAGNETITE                 (    5%)
             Size(mm):      <0.02  Morphology: DUST-LIKE

             GLASS                     (   89%)
             ALTERED MESOSTASIS*

Alteration - CLAY MINERALS             (   90%)
             Location: MESOSTASIS     Replacing: GLASS
             PROBABLY PALAGONITE*




Leg : 61    Top/Bottom Interval(mm):  960/ 980  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   806.50   Rock Type: IGNEOUS
Core:  56   Sample Midpoint(m)     :   808.97   Sect/Pc #:  2/PCE 9

ROCK = ZEOLITE VEIN IN GLASS;

Alteration - CLAY MINERALS             (   15%)
             Location: VEIN MARGINS   Replacing: GLASS,ZEOLITES

             ZEOLITE                   (   85%)
             Location: VEIN INTERIOR
             REPLACING VEIN INFILLING,CRYSTALLINE AND FIBROUS*




Leg : 61    Top/Bottom Interval(mm): 1070/1090  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   806.50   Rock Type: IGNEOUS
Core:  56   Sample Midpoint(m)     :   809.08   Sect/Pc #:  2/PCE 10

ROCK = GLASS TO BASALT
       CONTACT OF GLASS AND VARIOLITIC BASALT;
       Texture: SPARSELY PORPHYRITIC,VARIOLITIC,VITROPHYRIC*

Phenocrysts- OLIVINE                   (    1%)
             Morphology: EUHEDRAL
             AVERAGE SIZE= 0.2 MM,MICROPHENOS,ALTERED;

             PLAGIOCLASE               (    1%)
             AVERAGE LENGTH= 0.5 MM;

             SPINEL                    (   TR%)
             INCLUSIONS IN OL*

Groundmass - PLAGIOCLASE               (    5%)
             Size(mm):      <0.02  Morphology: LATHS

             MAGNETITE                 (    0%)

             GLASS                     (   95%)
             MESOSTASIS,ALTERED IN VARIOLITIC BASALT AND FRESH
             IN VITROPHYRE*

Alteration - CLAY MINERALS             (   93%)
             Location: MESOSTASIS     Replacing: GLASS
             PROBABLY PALAGONITE,ALTERED IN VARIOLITIC BASALT
             AND FRESH IN VITROPHYRIC BASALT*




Leg : 61    Top/Bottom Interval(mm): 1460/1480  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   815.50   Rock Type: IGNEOUS
Core:  57   Sample Midpoint(m)     :   816.97   Sect/Pc #:  1/PCE 13

ROCK = OL MODERATELY MICROPHYRIC BASALT;
       Texture: MODERATELY MICROPHYRIC,FINE GRAINED,
       INTERSERTAL-EQUIGRANULAR;
       Where sampled: SILL OR FLOW INTERIOR*

Phenocrysts- OLIVINE                   (    4%)
             Size(mm):    0.1-0.2
             CLAY + ZEOLITE PSEUDOMORPHS,MICROPHENOS;

             PLAGIOCLASE               (   TR%)
             Size(mm):    0.2-0.3  Morphology: EUHEDRAL,SKELETAL
             APPROX COMP AN70,MICROPHENOS;

             SPINEL
             Size(mm):     <0.003
             INCLUSIONS IN OL PSEUDOMORPHS*

Groundmass - PLAGIOCLASE               (   25%)
             Size(mm):       <0.2  Morphology: SKELETAL LATHS
             MICROLITES;

             CLINOPYROXENE             (   56%)
             Size(mm):     TO 0.1  Morphology: BUNDLES,GRANULES
             AUGITE,QUENCH;

             MAGNETITE                 (   10%)
             Size(mm):      <0.01
             TI-MAGN;

             GLASS                     ( 5-10%)

Alteration - CLAY MINERALS             (    5%)
             Replacing: GLASS,OL MICROPHENOS,PLAG
             PSEUDOMORPHS AFTER OL;

             ZEOLITE
             Replacing: GLASS,OL MICROPHENOS,PLAG
             PERCENTAGE VARIABLE,PSEUDOMORPHS AFTER OL;

             CHLORITE
             Replacing: GLASS,OL MICROPHENOS,PLAG
             PERCENTAGE VARIABLE*




Leg : 61    Top/Bottom Interval(mm):  190/ 210  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   824.50   Rock Type: IGNEOUS
Core:  58   Sample Midpoint(m)     :   826.20   Sect/Pc #:  2/PCE 2

ROCK = APHYRIC BASALT
       ALTERED;
       Texture: APHYRIC,INTERSERTAL-EQUIGRANULAR;
       Where sampled: SILL INTERIOR*

Phenocrysts- OLIVINE                   (   <1%)
             Size(mm):    0.1-0.2
             CLAY + CHLORITE PSEUDOMORPHS,MICROPHENOS;

             PLAGIOCLASE               (   <1%)
             Size(mm):    0.1-0.3
             CLAY PSEUDOMORPHS,MICROPHENOS;

             CLINOPYROXENE             (   <1%)
             Size(mm):    0.1-0.2  Morphology: ANHEDRAL
             AUGITE,MICROPHENOS*

Groundmass - PLAGIOCLASE               (   20%)
             Morphology: SKELETAL LATHS
             <0.5 MM LONG,IN GROUNDMASS;

             CLINOPYROXENE             (   58%)
             Morphology: SPRAYS,GRANULES
             QUENCH;

             MAGNETITE                 (    7%)
             Size(mm):       <0.1
             TI-MAGN*

Alteration - COMBINATION               (   15%)
             Location: VEINS          Replacing: ALL.MINS
             INCLUDES CLAY + CHLORITE,BROWN CLAY REPLACES
             EVERYTHING AND GREEN CLAY IS IN VEINS,PSEUDOMORPHS
             AFTER OL + PLAG*




Leg : 61    Top/Bottom Interval(mm):  410/ 430  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   824.50   Rock Type: IGNEOUS
Core:  58   Sample Midpoint(m)     :   827.92   Sect/Pc #:  3/PCE 2B

ROCK = DOLERITE
       ALTERED;
       Texture: SUBOPHITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- OLIVINE                   (   TR%)
             Size(mm):        0.1
             POSSIBLE CLAY PSEUDOMORPHS OF OL (COULD BE CPX
             PSEUDOMORPHS)*

Groundmass - PLAGIOCLASE               (   30%)
             Size(mm):    0.1-0.3  Morphology: SUBHEDRAL,LATHS
             APPROX COMP AN57;

             CLINOPYROXENE             (   48%)
             Size(mm):    0.1-0.2
             AUGITE,SUBOPHITIC;

             MAGNETITE                 (    7%)
             Size(mm):       <0.1  Morphology: SKELETAL
             TI-MAGN*

Alteration - CLAY MINERALS             (   15%)
             Replacing: CPX
             GREEN CLAY REPLACING CPX (MOSTLY) BUT COULD BE
             SOME PSEUDOMORPHS AFTER OL MICROPHENOS*




Leg : 61    Top/Bottom Interval(mm): 1320/1340  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   833.50   Rock Type: IGNEOUS
Core:  59   Sample Midpoint(m)     :   837.83   Sect/Pc #:  3/PCE 2

ROCK = PLAG-OL SPARSELY MICROPHYRIC BASALT;
       Texture: SPARSELY MICROPHYRIC,OPHITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- OLIVINE                   (    1%)
             Size(mm):    0.1-0.5
             CLAY-CALCITE PSEUDOMORPHS,MICROPHENOS;

             PLAGIOCLASE               (    1%)
             Size(mm):    0.2-0.6  Morphology: SUBHEDRAL,LATHS
             MICROPHENOS*

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):    0.1-0.2  Morphology: SUBHEDRAL
             APPROX COMP AN60;

             CLINOPYROXENE             (   43%)
             Size(mm):       <0.2  Morphology: GRANULES,SUBHEDRAL
             AUGITE;

             MAGNETITE                 (    5%)
             Size(mm):       <0.1
             TI-MAGN;

             COMBINATION               (   TR%)
             INCLUDES QUARTZ + ALK.SPAR GRANOPHYRES PERHAPS;

             APATITE                   (   TR%)
             Morphology: ACICULAR
             MASSES OF ACICULAR XTLS IN INTERSTITIAL FE-RICH
             REGION*

Alteration - CALCITE
             Replacing: OL MICROPHENOS
             PERCENTAGE VARIABLE,CLAY-CALCITE PSEUDOMORPHS
             AFTER OL;

             CLAY MINERALS             (   10%)
             Replacing: CPX
             BROWN AND GREEN CLAY REPLACING CPX (MOSTLY)*




Leg : 61    Top/Bottom Interval(mm): 1080/1110  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   833.50   Rock Type: IGNEOUS
Core:  59   Sample Midpoint(m)     :   842.10   Sect/Pc #:  6/PCE 7

ROCK = PLAG-CPX SPARSELY MICROPHYRIC BASALT
       ALTERED;
       Texture: SPARSELY MICROPHYRIC,MIXED INTERSERTAL +
       INTERGRANULAR;
       Where sampled: FLOW INTERIOR*

Phenocrysts- OLIVINE                   (   TR%)
             Size(mm):    0.1-0.3
             PSEUDOMORPHS (MAY BE CPX),MICROPHENOS;

             PLAGIOCLASE               (    1%)
             Size(mm):    0.2-0.5
             APPROX COMP AN68,MICROPHENOS;

             CLINOPYROXENE             (   <1%)
             Size(mm):    0.1-0.3
             AUGITE,MICROPHENOS*

Groundmass - PLAGIOCLASE
             Size(mm):    0.1-0.2  Morphology: SUBHEDRAL-ANHEDRAL
             APPROX COMP AN65;

             CLINOPYROXENE
             Size(mm):  <0.1-0.15  Morphology: GRANULES
             QUENCH PHASE AND GRANULES,AUGITE;

             MAGNETITE                 (    5%)
             Size(mm):     <0.005  Morphology: GRANULES
             TI-MAGN*

Alteration - CLAY MINERALS             (   10%)
             Replacing: ALL.MINS
             BROWN CLAY REPLACING EVERYTHING*




Leg : 61    Top/Bottom Interval(mm): 1310/1330  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   833.50   Rock Type: IGNEOUS
Core:  59   Sample Midpoint(m)     :   842.32   Sect/Pc #:  6/PCE 8

ROCK = PLAG-CPX MODERATELY MICROPHYRIC BASALT;
       Texture: MODERATELY MICROPHYRIC,VARIOLITIC;
       Where sampled: FLOW MARGIN*

Phenocrysts- OLIVINE                   (   TR%)
             PSEUDOMORPHS MAY BE CPX;

             PLAGIOCLASE               (    1%)
             Size(mm):       <0.2  Morphology: EUHEDRAL,TABULAR
             APPROX COMP AN65,MICROPHENOS;

             CLINOPYROXENE             (    1%)
             Size(mm):   0.1-0.15  Morphology: EUHEDRAL-SUBHEDRAL
             AUGITE,SECTOR ZONING,MICROPHENOS;

             SPINEL                    (   TR%)
             Size(mm):     <0.003
             INCLUSIONS IN PLAG*

Groundmass - MAGNETITE                 (   10%)
             Size(mm):      0.002  Morphology: DUST-LIKE
             TI-MAGN;

             GLASS                     (   88%)
             GROUNDMASS IS VARIOLITIC,MOSTLY VERY FINE QUENCH,
             MOST REPLACED TO VARIABLE DEGREES BY CLAY,NO FRESH
             GLASS PRESENT*

Alteration - AMPHIBOLE
             Replacing: CPX
             REPLACING CPX ET AL;

             CLAY MINERALS
             Location: QUENCH PHASES  Replacing: GLASS,MICROPHENOS
             PERCENTAGE VARIABLE,REPLACING QUENCH PHASES +
             MICROPHENOS + GLASS*




Leg : 61    Top/Bottom Interval(mm):  990/1010  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   842.50   Rock Type: IGNEOUS
Core:  60   Sample Midpoint(m)     :   846.50   Sect/Pc #:  3/PCE 4

ROCK = PLAG-OL SLIGHTLY MICROPHYRIC BASALT;
       Texture: SLIGHTLY MICROPHYRIC,HYALOPILITIC-INTERSERTAL;
       Where sampled: SILL BOTTOM*

Phenocrysts- OLIVINE                   (    1%)
             Morphology: EUHEDRAL
             AVERAGE SIZE= 0.3 MM,MICROPHENOS,ALTERED;

             PLAGIOCLASE               (    1%)
             AVERAGE LENGTH= 0.4 MM,MICROPHENOS,APPROX COMP
             AN85*

Groundmass - PLAGIOCLASE               (    5%)
             Size(mm):      <0.05  Morphology: LATHS

             CLINOPYROXENE             (    1%)
             Morphology: IRREGULAR
             AVERAGE SIZE 0.08 MM;

             MAGNETITE                 (    3%)
             Morphology: DUST-LIKE
             AVERAGE SIZE= 0.06;

             GLASS                     (   89%)
             ALTERED*

Alteration - CLAY MINERALS             (   90%)
             Replacing: OL MICROPHENOS,GLASS
             GREENISH BROWN PSEUDOMORPHS AFTER OL AND REDDISH
             BROWN CLAY REPLACING GLASS*




Leg : 61    Top/Bottom Interval(mm):  300/ 320  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   851.50   Rock Type: IGNEOUS
Core:  61   Sample Midpoint(m)     :   851.81   Sect/Pc #:  1/PCE 4

ROCK = VITROPHYRIC TO VARIOLITIC BASALT
       CONTACT OF VITROPHYRIC AND VARIOLITIC BASALTS,
       THIN (5.2 MM) BAND OF ENRICHMENT IN GLASS IS
       LOCATED IN VARIOLITIC BASALT IN CONTACT WITH
       GLASS;
       Texture: VARIOLITIC-VITROPHYRIC;
       Where sampled: TOP OF SILL*

Groundmass - OLIVINE
             FRESH OL IN VITROPHYRIC BASALT;

             PLAGIOCLASE

             CLINOPYROXENE

             MAGNETITE

             PYRITE

Alteration - CLAY MINERALS             (   95%)
             Replacing: GLASS
             ONLY REPLACING GLASS IN VARIOLITIC BASALT--GLASS
             IN THE VITROPHYRIC BASALT IS FRESH*




Leg : 61    Top/Bottom Interval(mm):  160/ 180  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   851.50   Rock Type: IGNEOUS
Core:  61   Sample Midpoint(m)     :   854.67   Sect/Pc #:  3/PCE 1C

ROCK = MICRODOLERITE;
       Texture: MICRODOLERITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- OLIVINE                   (    1%)
             Morphology: EUHEDRAL
             AVERAGE SIZE= 0.4 MM,MICROPHENOS;

             PLAGIOCLASE               (    1%)
             AVERAGE LENGTH= 0.6 MM,ZONED*

Groundmass - PLAGIOCLASE               (   52%)
             AVERAGE LENGTH= 0.3 MM,SMALL MICROLITES;

             CLINOPYROXENE             (   39%)
             AVERAGE SIZE= 0.12 MM,INTERSTITIAL;

             MAGNETITE                 (    7%)
             Morphology: IRREGULAR
             AVERAGE SIZE= 0.1 MM;

             GLASS                     (    1%)
             PERCENTAGE UNCERTAIN*

Alteration - CARBONATE                 (   TR%)
             Location: INTERSTITIAL   Replacing: OL MICROPHENOS

             CLAY MINERALS             (    5%)
             Replacing: OL MICROPHENOS




Leg : 61    Top/Bottom Interval(mm):  630/ 650  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   860.50   Rock Type: IGNEOUS
Core:  62   Sample Midpoint(m)     :   861.14   Sect/Pc #:  1/PCE 1E

ROCK = PLAG-OL MODERATELY PHYRIC BASALT
       MORE FINE GRAINED THAN PREVIOUS,INTERSTICES OF
       GLASS SPOTS INFILLED BY MICRODOLERITIC AGGREGATES,
       GLOMEROPORPHYRITIC;
       Texture: MODERATELY PORPHYRITIC,INTERSERTAL-
       MICRODOLERITIC;
       Where sampled: BOUNDARY OF TWO SILLS*

Phenocrysts- OLIVINE                   (    1%)
             Morphology: ROUNDED
             AVERAGE SIZE= 0.2 MM,MICROPHENOS,ALTERED;

             PLAGIOCLASE               (    3%)
             Morphology: ELONGATE PRISMS,TABULAR
             AVERAGE LENGTH 1.2 MM,APPROX COMP 67-72,ZONED;

             CLINOPYROXENE
             Morphology: EQUIGRANULAR
             AVERAGE SIZE= 0.4 MM,MICROPHENOS*

Groundmass - PLAGIOCLASE
             Morphology: LATHS
             PERCENTAGE VARIABLE,MICROLITES;

             CLINOPYROXENE
             Morphology: IRREGULAR

             MAGNETITE                 (  0-5%)

             GLASS                     (   80%)
             MESOSTASIS*

Alteration - CLAY MINERALS             (   90%)
             Location: MESOSTASIS     Replacing: GLASS,OL MICROPHENOS
             PSEUDOMORPHS*




Leg : 61    Top/Bottom Interval(mm):  100/ 120  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   860.50   Rock Type: IGNEOUS
Core:  62   Sample Midpoint(m)     :   862.11   Sect/Pc #:  2/PCE 1A

ROCK = MICRODOLERITE
       MORE COARSE GRAINED THAN PREVIOUS;
       Texture: MICRODOLERITIC,GLASSY;
       Where sampled: SILL INTERIOR
       NEAR TOP*

Groundmass - OLIVINE                   (    1%)
             Morphology: ROUNDED
             AVERAGE SIZE= 0.4 MM;

             PLAGIOCLASE               (   59%)
             AVERAGE LENGTH= 0.4 MM,MICROLITES;

             CLINOPYROXENE             (   32%)
             Morphology: EQUIDIMENSIONAL
             AVERAGE SIZE= 0.2 MM;

             MAGNETITE                 (    5%)
             Morphology: DUST-LIKE
             AVERAGE SIZE= 0.08 MM;

             GLASS                     (    3%)
             INTERSTITIAL*

Alteration - CLAY MINERALS             (    5%)
             Location: INTERSTITIAL   Replacing: GLASS,OL
             PSEUDOMORPHS*




Leg : 61    Top/Bottom Interval(mm):   00/  30  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   860.50   Rock Type: IGNEOUS
Core:  62   Sample Midpoint(m)     :   865.02   Sect/Pc #:  4/PCE 1

ROCK = PLAG-CPX MODERATELY MICROPHYRIC BASALT;
       Texture: MODERATELY MICROPHYRIC,VARIOLITIC;
       Where sampled: SILL TOP*

Phenocrysts- OLIVINE                   (   TR%)
             Morphology: EUHEDRAL
             AVERAGE SIZE= 0.5 MM;

             PLAGIOCLASE               (    1%)
             AVERAGE LENGTH= 0.2 MM,MICROPHENOS;

             CLINOPYROXENE             (    1%)
             AVERAGE SIZE= 0.08 MM,MICROPHENOS*

Alteration - CLAY MINERALS             (   95%)
             Location: MESOSTASIS




Leg : 61    Top/Bottom Interval(mm):  190/ 210  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   864.50   Rock Type: IGNEOUS
Core:  63   Sample Midpoint(m)     :   864.70   Sect/Pc #:  1/PCE 2

ROCK = HYALOPILITIC BASALT TO MICRODOLERITE
       CONTACT OF HYALOPILITIC BASALT AND FINE GRAINED
       MICRODOLERITE,MICROINTRUSIONS OF MAGMA FROM
       INTERIOR TO CHILLED MARGIN OF SILL;
       Texture: HYALOPILITIC FINE GRAINED;
       Where sampled: GLASSY MARGIN*

Phenocrysts- OLIVINE                   (    2%)
             IN HYALOPILITIC BASALT;

             PLAGIOCLASE               (   TR%)
             IN HYALOPILITIC BASALT;

             MAGNETITE
             Morphology: OCTAHEDRONS

Alteration - CARBONATE

             CLAY MINERALS




Leg : 61    Top/Bottom Interval(mm):  360/ 380  Describer: Shcheka, S.A.
Hole: 462A  Top of Core Depth(m)   :   864.50   Rock Type: IGNEOUS
Core:  63   Sample Midpoint(m)     :   864.87   Sect/Pc #:  1/PCE 4A

ROCK = VARIOLITIC TO HYALOPILITIC BASALT
       CONTACT OF VARIOLITIC AND HYALOPILITIC BASALTS,
       GLASSY SPOTTED ZONE ON CONTACT IS OBSERVED,
       INTERIORS OF SPOTS ARE INFILLED BY MICRODOLERITIC
       AGGREGATES;
       Texture: VARIOLITIC,HYALOPILITIC;
       Where sampled: GLASSY MARGIN*

Groundmass - OLIVINE                   (    2%)
             ONLY IN THE VARIOLITIC BASALT*

Alteration - CLAY MINERALS             (   90%)
             Location: MESOSTASIS     Replacing: GLASS,OL
             REDDISH BROWN*

Vesicles   -
             Percent:     0




Leg : 61    Top/Bottom Interval(mm):  200/ 220  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   869.50   Rock Type: IGNEOUS
Core:  64   Sample Midpoint(m)     :   869.71   Sect/Pc #:  1/PCE 1B

ROCK = APHYRIC BASALT
       ALTERED;
       Texture: APHYRIC,MICRODOLERITIC;
       Where sampled: SILL INTERIOR*

Groundmass - PLAGIOCLASE               (   38%)
             Size(mm):    0.2-0.4
             APPROX COMP AN68-70;

             CLINOPYROXENE             (   40%)
             Size(mm):       <0.2
             AUGITE;

             MAGNETITE                 (    5%)
             Size(mm):      <0.08  Morphology: IRREGULAR
             TI-MAGN;

             GLASS                     (    7%)
             SMALL INTERSTITIAL PATCHES (ALTERED)*

Alteration - CLAY MINERALS             (   10%)
             Replacing: GLASS,CPX
             BROWN*




Leg : 61    Top/Bottom Interval(mm): 1220/1250  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   869.50   Rock Type: IGNEOUS
Core:  64   Sample Midpoint(m)     :   870.74   Sect/Pc #:  1/PCE 1E

ROCK = DOLERITE
       ALTERED;
       Texture: MICRODIABASIC;
       Where sampled: FINE GRAINED ZONE OF SILL INTERIOR*

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):    0.2-0.4  Morphology: SUBHEDRAL
             APPROX COMP AN68-71;

             CLINOPYROXENE             (   45%)
             Size(mm):    0.1-0.2  Morphology: SUBHEDRAL
             AUGITE;

             MAGNETITE                 (    5%)
             Size(mm):      <0.08  Morphology: SKELETAL
             TI-MAGN*

Alteration - CLAY MINERALS             (   10%)
             Replacing: CPX
             BROWN*




Leg : 61    Top/Bottom Interval(mm):  600/ 620  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   869.50   Rock Type: IGNEOUS
Core:  64   Sample Midpoint(m)     :   871.61   Sect/Pc #:  2/PCE 1C

ROCK = DOLERITE
       ALTERED;
       Texture: SUBOPHITIC;
       Where sampled: SILL INTERIOR*

Groundmass - PLAGIOCLASE               (   35%)
             Size(mm):    0.3-0.4  Morphology: SUBHEDRAL
             APPROX COMP AN75-77;

             CLINOPYROXENE             (   45%)
             Size(mm):   0.2-0.35  Morphology: SUBHEDRAL
             AUGITE;

             MAGNETITE                 (    5%)
             Size(mm):       <0.1
             TI-MAGN;

             GLASS                     (    5%)
             INTERSTITIAL PATCHES*

Alteration - CLAY MINERALS             (   15%)
             Replacing: CPX,GLASS
             BROWN*




Leg : 61    Top/Bottom Interval(mm):  300/ 320  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   869.50   Rock Type: IGNEOUS
Core:  64   Sample Midpoint(m)     :   874.31   Sect/Pc #:  4/PCE 1B

ROCK = APHYRIC BASALT
       ALTERED;
       Texture: APHYRIC,MIXED EQUIGRANULAR + MICRODIABASIC;
       Where sampled: FINE GRAINED ZONE OF SILL INTERIOR*

Phenocrysts- OLIVINE                   (   <1%)
             Size(mm):    0.3-0.5
             CLAY PSEUDOMORPHS,MICROPHENOS;

             PLAGIOCLASE               (   <1%)
             Size(mm):    0.3-0.5
             APPROX COMP AN64-66,MICROPHENOS;

             CLINOPYROXENE             (   <1%)
             Size(mm):    0.5-0.2
             AUGITE,MICROPHENOS*

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):       <0.2  Morphology: SUBHEDRAL
             APPROX COMP AN65;

             CLINOPYROXENE             (   43%)
             Size(mm):       <0.2  Morphology: SUBHEDRAL
             AUGITE;

             MAGNETITE                 (   10%)
             Size(mm):      <0.04
             TI-MAGN*

Alteration - CLAY MINERALS             (    7%)
             Replacing: ALL.MINS
             BROWN CLAY REPLACING EVERYTHING,PSEUDOMORPHS AFTER
             OL*




Leg : 61    Top/Bottom Interval(mm):  600/ 620  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   876.50   Rock Type: IGNEOUS
Core:  65   Sample Midpoint(m)     :   878.61   Sect/Pc #:  2/PCE 1

ROCK = DOLERITE
       ALTERED;
       Texture: SUBOPHITIC;
       Where sampled: SILL INTERIOR*

Phenocrysts- OLIVINE                   (   TR%)
             Size(mm):    0.3-0.5
             CLAY PSEUDOMORPHS WHICH COULD BE CPX,MICROPHENOS*

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):    0.2-0.4  Morphology: SUBHEDRAL-EUHEDRAL
             APPROX COMP AN63;

             CLINOPYROXENE             (   45%)
             Size(mm):    0.2-0.4  Morphology: SUBHEDRAL
             AUGITE;

             MAGNETITE                 (    5%)
             Size(mm):       <0.1  Morphology: SKELETAL
             TI-MAGN;

             GLASS                     (    2%)
             INTERSTITIAL PATCHES*

Alteration - CLAY MINERALS             (   10%)
             POSSIBLE PSEUDOMORPHS AFTER OL MICROPHENOS (COULD
             BE CPX)*




Leg : 61    Top/Bottom Interval(mm):  200/ 220  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   883.00   Rock Type: IGNEOUS
Core:  66   Sample Midpoint(m)     :   883.21   Sect/Pc #:  1/PCE 1

ROCK = PLAG-CPX MODERATELY MICROPHYRIC BASALT
       MASSIVE BASALT SILL;
       Texture: MODERATELY MICROPHYRIC,SUBOPHITIC-INTERGRANULAR;
       Where sampled: NEAR SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (  5-6%)
             Size(mm):    0.4-0.5  Morphology: TABULAR,PRISMATIC
             APPROX COMP AN65,MICROPHENOS;

             CLINOPYROXENE             (  3-4%)
             Size(mm):        0.4  Morphology: SUBHEDRAL
             SOME TYPES ARE PALE GREENISH,MICROPHENOS*

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):        0.3  Morphology: SUBHEDRAL
             MICROLITES;

             CLINOPYROXENE             (   45%)
             Size(mm):        0.3  Morphology: SUBHEDRAL
             MICROLITES;

             MAGNETITE                 (  3-5%)
             Size(mm):       <0.2  Morphology: SKELETAL,DUST-LIKE
             TWO TYPES:  1)LARGE SKELETAL (THIS TYPE IS CLOSELY
             ASSOCIATED WITH ALTERED ZONE AND MAY BE SECONDARY)
             AND 2)SMALL DUST-LIKE*

Alteration - CALCITE
             Location: VEIN MARGINS

             ZEOLITE
             Location: VEIN INTERIOR

             CLAY MINERALS             ( 5-10%)
             Location: VEINS          Replacing: PLAG,CPX
             SOMETIMES IN BETWEEN CALCITE AND ZEOLITE IN VEINS*




Leg : 61    Top/Bottom Interval(mm):  330/ 350  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   883.00   Rock Type: IGNEOUS
Core:  66   Sample Midpoint(m)     :   892.34   Sect/Pc #:  7/PCE 1B

ROCK = DOLERITE
       MASSIVE DOLERITE SILL;
       Texture: SUBOPHITIC-INTERGRANULAR;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   25%)
             Size(mm):    0.4-1.0  Morphology: TABULAR-PRISMATIC

             CLINOPYROXENE             (   15%)
             Size(mm):    0.5-1.0  Morphology: SUBHEDRAL

             MAGNETITE                 (    3%)
             Morphology: SKELETAL

Groundmass - PLAGIOCLASE               (   25%)
             Size(mm):       <0.3
             MICROLITES;

             CLINOPYROXENE             (   25%)
             Size(mm):       <0.4
             MICROLITES;

             MAGNETITE                 (    3%)
             Size(mm):       <0.2  Morphology: SKELETAL,DUST-LIKE

             COMBINATION               (  3-4%)
             INCLUDES QUARTZ + ALK.SPAR, INTERGROWN, FORMING
             MICROPEGMATITE,COEXISTS WITH SKELETAL MAGN;

             HORNBLENDE
             GREEN;

             APATITE

Alteration - CLAY MINERALS             (  5-6%)
             Replacing: PLAG

             CHLORITE                  (  1-3%)
             Location: SPOTS          Replacing: CPX




Leg : 61    Top/Bottom Interval(mm):   80/ 100  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   892.00   Rock Type: IGNEOUS
Core:  67   Sample Midpoint(m)     :   892.09   Sect/Pc #:  1/PCE 1B

ROCK = DOLERITE
       MASSIVE DOLERITE SILL;
       Texture: OPHITIC-INTERGRANULAR;
       Where sampled: SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (   15%)
             Size(mm):    0.8-1.2  Morphology: PRISMATIC
             APPROX COMP AN60;

             CLINOPYROXENE             (   30%)
             Size(mm):    0.8-1.2  Morphology: ANHEDRAL

             MAGNETITE                 (  1-3%)
             Size(mm):    0.4-0.8  Morphology: SKELETAL

Groundmass - PLAGIOCLASE               (   15%)
             Size(mm):       <0.7  Morphology: PRISMATIC-TABULAR
             MICROLITES;

             CLINOPYROXENE             (   30%)
             Size(mm):       <0.7  Morphology: ANHEDRAL-SUBHEDRAL
             MICROLITES;

             MAGNETITE                 (    4%)
             Size(mm):       <0.4  Morphology: SKELETAL,DUST-LIKE

             COMBINATION               (    4%)
             INCLUDES QUARTZ + ALK.SPAR, INTERGROWN, FORMING
             MICROPEGMATITE,COEXISTS WITH SKELETAL MAGN;

             HORNBLENDE                (   TR%)
             GREEN;

             APATITE                   (   TR%)

Alteration - CLAY MINERALS             ( 5-10%)
             Location: SPOTS          Replacing: PLAG

             CHLORITE                  (  3-5%)
             Location: SPOTS          Replacing: CPX
             CPX ALTERED TO CHLORITE + MAGN*




Leg : 61    Top/Bottom Interval(mm): 1240/1260  Describer: Tokuyama, H.
Hole: 462A  Top of Core Depth(m)   :   892.00   Rock Type: IGNEOUS
Core:  67   Sample Midpoint(m)     :   900.75   Sect/Pc #:  6/PCE 1I

ROCK = DOLERITE
       MASSIVE DOLERITE SILL;
       Texture: SUBOPHITIC-INTERGRANULAR;
       Where sampled: NEAR SILL INTERIOR*

Phenocrysts- OLIVINE                   (   TR%)
             Size(mm):          1
             PSEUDOMORPH ALTERED TO CLAY;

             PLAGIOCLASE               (  5-6%)
             Size(mm):    0.4-0.5  Morphology: TABULAR,PRISMATIC
             APPROX COMP AN65,MICROPHENOS;

             CLINOPYROXENE             (  3-4%)
             Size(mm):        0.4  Morphology: SUBHEDRAL
             SOME TYPES ARE PALE GREENISH*

Groundmass - OLIVINE                   (  1-3%)
             Size(mm):       <0.4
             PSEUDOMORPH ALTERED TO CHLORITE,COEXISTS WITH
             MAGN;

             PLAGIOCLASE               (   40%)
             Size(mm):        0.3  Morphology: SUBHEDRAL
             MICROLITES;

             MAGNETITE                 (  3-5%)
             Size(mm):       <0.2  Morphology: SKELETAL,DUST-LIKE
             TWO TYPES:  1)LARGE SKELETAL (THIS TYPE IS CLOSELY
             ASSOCIATED WITH THE ALTERED ZONE AND MAY BE
             SECONDARY) AND 2)SMALL DUST-LIKE*

Alteration - CLAY MINERALS             (   10%)
             Replacing: PLAG,OL PHENOS
             PSEUDOMORPHS AFTER OL PHENOS;

             CHLORITE                  (  2-4%)
             Location: SPOTS          Replacing: OL,CPX
             PSEUDOMORPHS AFTER GROUNDMASS OL*




Leg : 61    Top/Bottom Interval(mm): 1160/1180  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   901.00   Rock Type: IGNEOUS
Core:  68   Sample Midpoint(m)     :   906.67   Sect/Pc #:  4/PCE 7

ROCK = DOLERITE
       ALTERED;
       Texture: SUBOPHITIC,FINE GRAINED;
       Where sampled: SILL INTERIOR*

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):    0.2-0.4
             APPROX COMP AN70;

             CLINOPYROXENE             (   40%)
             Size(mm):   0.15-0.3  Morphology: SUBHEDRAL

             AUGITE,H                  (AS SU%)
             Size(mm): BOPHITIC T  Morphology: EXTURE;

             MAGNETITE                 (    5%)
             Size(mm):       <0.1
             TI-MAGN;

             GLASS                     (    5%)
             INTERSTITIAL GLASSY PATCHES REPLACED BY BROWN
             CLAY;

             APATITE                   (   TR%)

Alteration - CLAY MINERALS             (   10%)
             Replacing: GLASS,CPX
             BROWN CLAY REPLACING GLASS + CPX ETC*




Leg : 61    Top/Bottom Interval(mm):  230/ 250  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   901.00   Rock Type: IGNEOUS
Core:  68   Sample Midpoint(m)     :   908.74   Sect/Pc #:  6/PCE 2

ROCK = PLAG-CPX SPARSELY MICROPHYRIC BASALT
       ALTERED;
       Texture: SPARSELY MICROPHYRIC,HYALOPILITIC;
       Where sampled: SILL INTERIOR
       FINE GRAINED PORTION*

Phenocrysts- PLAGIOCLASE               (    1%)
             Size(mm):    0.2-0.3  Morphology: EUHEDRAL-SUBHEDRAL
             MICROPHENOS,REPLACED,APPROX COMP AN68;

             CLINOPYROXENE             (    1%)
             Size(mm):    0.1-0.3  Morphology: EUHEDRAL-SUBHEDRAL
             MICROPHENOS,AUGITE*

Groundmass - MAGNETITE                 (    5%)
             Size(mm):     <0.004  Morphology: DUST-LIKE
             TI-MAGN;

             GLASS                     (   93%)
             GLASSY GROUNDMASS CONSISTS OF SPARSE PLAG
             MICROLITES + QUENCH CPX + GLASS--ALL ARE BEING
             REPLACED BY CLAY + CALCITE;

             PLAGIOCLASE
             SPARSE MICROLITES;

             CLINOPYROXENE
             QUENCH*

Alteration - CALCITE
             Replacing: PLAG,GLASS
             PERCENTAGE VARIABLE;

             CLAY MINERALS
             Replacing: ALL.MINS,GLASS
             PERCENTAGE QUESTIONABLE,BROWN CLAY REPLACES
             EVERYTHING*




Leg : 61    Top/Bottom Interval(mm):  280/ 300  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   910.00   Rock Type: IGNEOUS
Core:  69   Sample Midpoint(m)     :   911.79   Sect/Pc #:  2/PCE 2C

ROCK = PLAG-CPX-OL MODERATELY MICROPHYRIC BASALT;
       Texture: MODERATELY MICROPHYRIC,GLASSY-VARIOLITIC;
       Where sampled: GLASSY FLOW MARGIN*

Phenocrysts- OLIVINE                   (    1%)
             Size(mm):    0.3-0.5
             QUESTIONABLE PSEUDOMORPHS,MICROPHENOS;

             PLAGIOCLASE               (    2%)
             Size(mm):    0.2-0.4  Morphology: EUHEDRAL
             APPROX COMP AN70-72,MICROPHENOS;

             CLINOPYROXENE             (    2%)
             Size(mm):    0.1-0.2  Morphology: EUHEDRAL-SUBHEDRAL
             AUGITE,MICROPHENOS*

Groundmass - PLAGIOCLASE
             VARIABLE PERCENTAGE,SMALL MICROLITES AND
             CRYSTALLITES;

             CLINOPYROXENE
             VARIABLE PERCENTAGE,QUENCH PHASE;

             MAGNETITE                 (    5%)
             Size(mm):      0.008  Morphology: DUST-LIKE
             TI-MAGN;

             GLASS
             GROUNDMASS IS GLASSY TO VARIOLITIC AND HEAVILY
             REPLACED BY CLAY*

Alteration - CLAY MINERALS
             Location: GROUNDMASS     Replacing: GROUNDMASS,GLASS
             PERCENTAGE VARIABLE;

             ZEOLITE
             Location: VEINS
             PERCENTAGE VARIABLE*




Leg : 61    Top/Bottom Interval(mm):  950/ 970  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   919.00   Rock Type: IGNEOUS
Core:  70   Sample Midpoint(m)     :   922.96   Sect/Pc #:  3/PCE 2

ROCK = CPX-PLAG ALTERED BASALT
       ALTERATION VEIN CONTACT WITH VARIOLITIC BASALT,
       ROCK IS CPX-PLAG ALTERED VARIOLITIC TEXTURED
       BASALT,VEIN IS DOMINANTLY (99.9%) A HIGH
       BIREFRINGENCE FIBROUS MINERAL WHICH LOOKS LIKE
       DISORDERED HYDRO-MICA BUT COULD BE A CLAY(?);
       Texture: VARIOLITIC;
       Where sampled: FLOW INTERIOR*

Alteration - ZEOLITE
             PRESENT,FIBROUS AND LOW BIREFRINGENCE;

             CLAY MINERALS             (  0.1%)
             Location: PATCHES IN
             Location: VEIN
             GREEN CLAY PATCHES IN VEIN AND REPLACES THE ROCK;

             HYDROMICA                 ( 99.9%)
             Location: VEIN
             HIGH BIREFRINGENCE,FIBROUS,LOOKS LIKE DISCOLORED
             HYDROMICA BUT COULD BE A CLAY?*




Leg : 61    Top/Bottom Interval(mm):  170/ 200  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   919.00   Rock Type: IGNEOUS
Core:  70   Sample Midpoint(m)     :   923.69   Sect/Pc #:  4/PCE 1

ROCK = CPX-PLAG MODERATELY MICROPHYRIC BASALT
       ALTERED;
       Texture: MODERATELY MICROPHYRIC,FINE GRAINED GRANULAR,
       COARSE GRAINED EQUIGRANULAR-SUBOPHITIC
       FINE GRAINED STUFF IS GRANULAR WITH AVERAGE GRAIN
       SIZE= 0.002 MM,COARSE GRAINED STUFF IS
       EQUIGRANULAR TO SUBOPHITIC WITH AVERAGE GRAIN SIZE
       = 0.06 MM;
       Where sampled: FLOW INTERIOR
       FINE GRAINED APOPHYSES IN MEDIUM GRAINED BASALT*

Phenocrysts- PLAGIOCLASE               (    2%)
             Size(mm):    0.1-0.2  Morphology: EUHEDRAL-SUBHEDRAL
             MICROPHENOS,APPROX COMP AN65;

             CLINOPYROXENE             (    3%)
             Size(mm):    0.1-0.2  Morphology: EUHEDRAL-SUBHEDRAL
             MICROPHENOS,AUGITE*

Groundmass - PLAGIOCLASE               (   42%)
             Size(mm):      <0.08
             APPROX COMP AN65;

             CLINOPYROXENE             (   43%)
             Size(mm):      <0.04
             AUGITE;

             MAGNETITE                 (10-15%)
             Size(mm):      <0.04
             15% IN FINE GRAINED REGIONS AND 10% IN COARSE
             GRAINED REGIONS,TI-MAGN*

Alteration - CLAY MINERALS             (   10%)
             Replacing: ALL.MINS
             BROWN CLAY ALTERATION OF EVERYTHING*




Leg : 61    Top/Bottom Interval(mm):  340/ 360  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   928.00   Rock Type: UNIDENTIFIED
Core:  71   Sample Midpoint(m)     :   928.35   Sect/Pc #:  1/PCE 5

ROCK = BASALTIC BRECCIA
       INTRUSIVE BRECCIA,CPX-PLAG PHYRIC VARIOLITIC-
       VITROPHYRIC BASALT,SWIRLY MIXTURE OF HYALOPILITIC
       AND VITROPHYRIC-SPHERULITIC BASALT INTRUDED AND
       BRECCIATED BY (NOW) COARSER GRAINED LIQUID. THE
       COARSE GRAINED BASALT IS SIMILAR IN TEXTURE TO
       OTHER BASALT APOPHYSES FOUND ELSEWHERE.
       ALTERATION VEINS TRANSECT PREVIOUSLY FORMED
       BRECCIA (I.E. BRECCIATION WAS PROBABLY CAUSED BY
       INTRUSION OF LATER LIQUID.);
       Texture: VARIOLITIC,HYALOPILITIC,VITROPHYRIC-SPHERULITIC;
       Where sampled: BRECCIATED ZONE OF PILLOW? MARGIN*




Leg : 61    Top/Bottom Interval(mm):  440/ 470  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   928.00   Rock Type: IGNEOUS
Core:  71   Sample Midpoint(m)     :   928.46   Sect/Pc #:  1/PCE 6

ROCK = CPX-PLAG PHYRIC BASALT;
       Texture: VARIOLITIC-EQUIGRANULAR
       CONTINUOUS AND MONOTONIC VARIATION IN GRAIN SIZE
       FROM VARIOLITIC TO EQUIGRANULAR TEXTURE;
       Where sampled: PILLOW INTERIOR
       COARSE GRAINED PORTION*




Leg : 61    Top/Bottom Interval(mm):  500/ 520  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   928.00   Rock Type: IGNEOUS
Core:  71   Sample Midpoint(m)     :   928.51   Sect/Pc #:  1/PCE 6

ROCK = CPX-PLAG PHYRIC BASALT
       CLAY FILLED ROUNDED VUGS ARE ABUNDANT;
       Texture: EQUIGRANULAR;
       Where sampled: COARSE GRAINED INTERIOR OF PILLOW*

Alteration - CLAY MINERALS
             Location: VUGS
             ABUNDANT CLAY FILLED VUGS*

Vesicles   -
             Filling: CLAY.MIN
             Shape: ROUNDED
             ABUNDANT VUGS*




Leg : 61    Top/Bottom Interval(mm):  530/ 550  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   931.00   Rock Type: IGNEOUS
Core:  72   Sample Midpoint(m)     :   933.04   Sect/Pc #:  2/PCE 4B

ROCK = ALTERED DOLERITE;
       Texture: SUBOPHITIC;
       Where sampled: SILL INTERIOR*

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):    0.2-0.6  Morphology: EUHEDRAL-SUBHEDRAL
             APPROX COMP AN60;

             CLINOPYROXENE             (   45%)
             Size(mm):    0.2-0.5  Morphology: EUHEDRAL-SUBHEDRAL
             AUGITE;

             MAGNETITE                 (    5%)
             Size(mm):    0.2-0.3  Morphology: SKELETAL
             TI-MAGN*

Alteration - CLAY MINERALS             (   10%)
             Replacing: ALL.MINS
             BROWN CLAY REPLACING EVERYTHING*




Leg : 61    Top/Bottom Interval(mm): 1240/1260  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   937.00   Rock Type: IGNEOUS
Core:  73   Sample Midpoint(m)     :   939.75   Sect/Pc #:  2/PCE 8

ROCK = DOLERITE
       ALTERED;
       Texture: SUBOPHITIC;
       Where sampled: SILL INTERIOR*

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):    0.3-0.6  Morphology: SUBHEDRAL
             APPROX COMP AN70-72;

             CLINOPYROXENE             (   40%)
             Size(mm):    0.3-0.6  Morphology: SUBHEDRAL
             AUGITE;

             MAGNETITE                 (   10%)
             Size(mm):    0.2-0.5  Morphology: SKELETAL
             TI-MAGN;

             COMBINATION               (   TR%)
             INCLUDES QUARTZ + ALK.SPAR GRANOPHYRIC
             INTERGROWTHS;

             APATITE                   (   TR%)

Alteration - CLAY MINERALS             (   10%)
             Replacing: ALL.MINS
             BROWN CLAY REPLACING EVERYTHING*




Leg : 61    Top/Bottom Interval(mm):  780/ 800  Describer: Seifert, K.
Hole: 462A  Top of Core Depth(m)   :   953.00   Rock Type: IGNEOUS
Core:  75   Sample Midpoint(m)     :   958.29   Sect/Pc #:  4/PCE 5A

ROCK = DOLERITE;
       Texture: SUBOPHITIC;
       Where sampled: SILL INTERIOR*

Groundmass - OLIVINE                   (    0%)

             PLAGIOCLASE               ( 53.6%)
             Morphology: LATHS
             DIMENSIONS= 0.5X0.05 MM,APPROX COMP 36 DEGREES BY
             A-NORMAL,NEED BETTER CURVES TO GET COMPOSITION;

             CLINOPYROXENE             ( 36.7%)
             Morphology: EQUIDIMENSIONAL
             DIMENSIONS= 0.2X0.2 MM;

             OPAQUE MINERALS           (  6.6%)
             INCLUDES MAGN + ILMENITE;

             GLASS                     (    0%)

             ORTHOPYROXENE             (    0%)

             QUARTZ                    (    0%)

             ALKALI FELDSPAR           (    0%)
             PERCENTAGES OBTAINED BY POINT COUNT (1000 POINTS)*

Alteration - CLAY MINERALS             (  3.1%)




Leg : 61    Top/Bottom Interval(mm):  310/ 320  Describer: Vallier, T.
Hole: 462A  Top of Core Depth(m)   :   953.00   Rock Type: IGNEOUS
Core:  75   Sample Midpoint(m)     :   959.32   Sect/Pc #:  5/PCE 2

ROCK = DOLERITE;
       Texture: SUBOPHITIC;
       Where sampled: FLOW OR SILL INTERIOR*

Groundmass - OLIVINE                   (<0.05%)
             REPLACED BY CLAY;

             PLAGIOCLASE               (   54%)

             CLINOPYROXENE             (   36%)
             2V 45-55;

             OPAQUE MINERALS           (    5%)
             INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY
             POINT COUNT (700 POINTS)*

Alteration - CLAY MINERALS             (    5%)
             Replacing: OL,GLASS
             REPLACING GLASS IS QUESTIONABLE*




Leg : 61    Top/Bottom Interval(mm): 1220/1240  Describer: Vallier, T.
Hole: 462A  Top of Core Depth(m)   :   953.00   Rock Type: IGNEOUS
Core:  75   Sample Midpoint(m)     :   960.23   Sect/Pc #:  5/PCE 7

ROCK = DOLERITE;
       Texture: SUBOPHITIC;
       Where sampled: FLOW OR SILL INTERIOR*

Groundmass - PLAGIOCLASE               (   58%)

             CLINOPYROXENE             (   31%)

             OPAQUE MINERALS           (    6%)
             INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY
             POINT COUNT (1000 POINTS)*

Alteration - CLAY MINERALS             (    5%)
             Replacing: GLASS
             REPLACING GLASS IS QUESTIONABLE*




Leg : 61    Top/Bottom Interval(mm):  590/ 610  Describer: Windom, K.
Hole: 462A  Top of Core Depth(m)   :   958.00   Rock Type: IGNEOUS
Core:  76   Sample Midpoint(m)     :   958.60   Sect/Pc #:  1/PCE 5

ROCK = DOLERITE;
       Texture: SUBOPHITIC;
       Where sampled: FLOW OR SILL INTERIOR*

Phenocrysts- OLIVINE                   (    0%)
             COMPLETELY ALTERED TO CLAY;

             PLAGIOCLASE               (    0%)

             CLINOPYROXENE             (    0%)

             SPINEL                    (    0%)

Groundmass - OLIVINE                   (    0%)

             PLAGIOCLASE               ( 37.7%)
             Size(mm):      0.1-6  Morphology: LATHS

             CLINOPYROXENE             ( 39.1%)
             Size(mm):   0.05-0.3  Morphology: EQUIGRANULAR
             2V 45-50,PARTIALLY ALTERED;

             OPAQUE MINERALS           (  6.7%)
             INCLUDES MAGN + ILMENITE;

             GLASS                     (    0%)
             ALL ALTERED TO CLAY;

             ORTHOPYROXENE             (    0%)

             QUARTZ                    (    0%)

             ALKALI FELDSPAR           (    0%)
             PERCENTAGES OBTAINED BY POINT COUNT (1000 POINTS)*

Alteration - CARBONATE                 (   TR%)
             Location: VEIN

             CLAY MINERALS             ( 16.5%)
             Location: INTERSTITIAL,  Replacing: GLASS,OL
             Location: VEINS

             PYRITE
             Location: VEINS
             SOME PYRITE OCCURRING IN VEINS*




Leg : 61    Top/Bottom Interval(mm):  210/ 230  Describer: Seifert, K.
Hole: 462A  Top of Core Depth(m)   :   967.00   Rock Type: IGNEOUS
Core:  77   Sample Midpoint(m)     :   967.22   Sect/Pc #:  1/PCE 2

ROCK = DOLERITE;
       Texture: SUBOPHITIC;
       Where sampled: FLOW OR SILL INTERIOR*

Groundmass - PLAGIOCLASE               ( 40.0%)
             Morphology: LATHS
             DIMENSIONS= 0.2X0.02 MM;

             CLINOPYROXENE             ( 47.1%)
             Size(mm):  0.02-0.08  Morphology: EQUIDIMENSIONAL

             OPAQUE MINERALS           (  5.3%)
             INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY
             POINT COUNT (1000 POINTS)*

Alteration - CLAY MINERALS             (  7.5%)
             Location: SCATTERED      Replacing: CPX
             MOSTLY REPLACING CPX*




Leg : 61    Top/Bottom Interval(mm):  750/ 770  Describer: Vallier, T.
Hole: 462A  Top of Core Depth(m)   :   967.00   Rock Type: IGNEOUS
Core:  77   Sample Midpoint(m)     :   967.76   Sect/Pc #:  1/PCE 3E

ROCK = OL-PLAG-CPX MODERATELY MICROPHYRIC BASALT;
       Texture: MODERATELY MICROPHYRIC,INTERGRANULAR-WEAKLY
       VARIOLITIC (AUGITE + PLAG);
       Where sampled: SILL INTERIOR
       QUESTIONABLE*

Phenocrysts- OLIVINE                   (  1-2%)
             Size(mm):    0.1-0.2

             PLAGIOCLASE               (   <1%)
             Size(mm):   0.05-0.1

             CLINOPYROXENE             (   <1%)
             Size(mm):   0.05-0.1

Groundmass - OLIVINE                   (  1.8%)

             PLAGIOCLASE               ( 41.7%)

             CLINOPYROXENE             ( 41.3%)

             OPAQUE MINERALS           ( 14.1%)
             INCLUDES MAGN + ILMENITE;

             GLASS
             ALTERED TO CLAY,PERCENTAGES OBTAINED BY POINT
             COUNT (1000 POINTS)*

Alteration - CLAY MINERALS             (  1.0%)
             Replacing: OL
             HIGH BIREFRINGENCE*




Leg : 61    Top/Bottom Interval(mm):  700/ 730  Describer: Windom, K.
Hole: 462A  Top of Core Depth(m)   :   967.00   Rock Type: IGNEOUS
Core:  77   Sample Midpoint(m)     :   969.22   Sect/Pc #:  2/PCE 2F

ROCK = DOLERITE;
       Texture: SUBOPHITIC-VARIOLITIC;
       Where sampled: FLOW OR SILL INTERIOR*

Phenocrysts- OLIVINE
             COMPLETELY ALTERED TO BROWN CLAY*

Groundmass - OLIVINE                   (    0%)

             PLAGIOCLASE               ( 40.3%)
             Size(mm):   0.05-0.3  Morphology: LATHS
             SLIGHTLY ALTERED,ZONED;

             CLINOPYROXENE             ( 39.5%)
             Size(mm):  0.04-0.15  Morphology: SUBHEDRAL GRAINS
             MODERATELY ALTERED;

             OPAQUE MINERALS           (  7.7%)
             INCLUDES MAGN + ILMENITE;

             GLASS                     (    0%)
             COMPLETELY ALTERED;

             ORTHOPYROXENE             (    0%)

             QUARTZ                    (    0%)

             ALKALI FELDSPAR           (    0%)
             PERCENTAGES OBTAINED BY POINT COUNT*

Alteration - CLAY MINERALS             ( 12.5%)
             Location: INTERSTITIAL   Replacing: GLASS,OL
             PSEUDOMORPHS AFTER OL*




Leg : 61    Top/Bottom Interval(mm):   50/  90  Describer: Windom, K.
Hole: 462A  Top of Core Depth(m)   :   976.00   Rock Type: IGNEOUS
Core:  78   Sample Midpoint(m)     :   976.07   Sect/Pc #:  1/PCE 2A

ROCK = DOLERITE;
       Texture: SUBOPHITIC-INTERSERTAL;
       Where sampled: FLOW OR SILL INTERIOR*

Phenocrysts- OLIVINE                   (    0%)
             COMPLETELY ALTERED*

Groundmass - OLIVINE                   (    0%)

             PLAGIOCLASE               ( 34.5%)
             Size(mm):    0.1-0.6  Morphology: LATHS
             GENERALLY FRESH,SLIGHTLY ZONED;

             CLINOPYROXENE             ( 43.4%)
             Size(mm):   0.05-0.4  Morphology: SUBHEDRAL GRAINS
             GENERALLY FRESH;

             OPAQUE MINERALS           (  5.5%)
             INCLUDES MAGN + ILMENITE;

             GLASS                     (    0%)
             COMPLETELY ALTERED;

             ORTHOPYROXENE             (    0%)

             QUARTZ                    (    0%)

             ALKALI FELDSPAR           (    0%)
             PERCENTAGES OBTAINED BY POINT COUNT*

Alteration - CARBONATE                 (    0%)

             CLAY MINERALS             ( 16.6%)
             Replacing: GLASS,OL

             ZEOLITE                   (    0%)




Leg : 61    Top/Bottom Interval(mm):  960/ 980  Describer: Windom, K.
Hole: 462A  Top of Core Depth(m)   :   976.00   Rock Type: IGNEOUS
Core:  78   Sample Midpoint(m)     :   976.97   Sect/Pc #:  1/PCE 4

ROCK = DOLERITE;
       Texture: VARIOLITIC-SUBOPHITIC;
       Where sampled: FLOW OR SILL INTERIOR*

Phenocrysts- OLIVINE                   (    0%)
             ALTERED TO BROWN CLAY;

             PLAGIOCLASE               (    0%)

             CLINOPYROXENE             (    0%)

             SPINEL                    (    0%)

Groundmass - OLIVINE                   (    0%)

             PLAGIOCLASE               ( 37.5%)
             Size(mm):  <0.01-0.4  Morphology: LATHS
             ALSO FINE INTERGROWTHS (RADIATING SHEAVES) WITH
             CPX;

             CLINOPYROXENE             ( 43.8%)
             Size(mm):   0.01-0.3  Morphology: EQUIGRANULAR
             ALSO FINE INTERGROWTHS (RADIATING SHEAVES) WITH
             PLAG;

             OPAQUE MINERALS           (  8.2%)
             INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY
             POINT COUNT*

Alteration - CLAY MINERALS             ( 10.4%)
             Location: INTERSTITIAL   Replacing: GLASS,OL
             PSEUDOMORPHS AFTER OL*




Leg : 61    Top/Bottom Interval(mm):  870/ 890  Describer: Seifert, K.
Hole: 462A  Top of Core Depth(m)   :   976.00   Rock Type: IGNEOUS
Core:  78   Sample Midpoint(m)     :   978.38   Sect/Pc #:  2/PCE 6

ROCK = DOLERITE;
       Texture: INTERSERTAL;
       Where sampled: FLOW OR SILL INTERIOR*

Groundmass - PLAGIOCLASE               ( 41.4%)
             Size(mm):  0.35X0.05  Morphology: LATHS
             DIMENSIONS= 0.35X0.05 MM;

             CLINOPYROXENE             ( 38.2%)
             Size(mm):  0.04-0.10  Morphology: EQUIDIMENSIONAL

             OPAQUE MINERALS           (  8.5%)
             INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY

Alteration - CLAY MINERALS             ( 11.9%)
             Replacing: GLASS,OL,CPX
             GOOD PSEUDOMORPHS AFTER OL*
             POINT COUNT (1000 POINTS)*




Leg : 61    Top/Bottom Interval(mm): 1380/1400  Describer: Vallier, T.
Hole: 462A  Top of Core Depth(m)   :   985.00   Rock Type: IGNEOUS
Core:  79   Sample Midpoint(m)     :   986.39   Sect/Pc #:  1/PCE 1N

ROCK = BASALT;
       Texture: INTERSERTAL*

Phenocrysts- OLIVINE
             Size(mm):   0.15-0.2
             MICROPHENOS;

             CLINOPYROXENE
             Size(mm):   0.1-0.15
             MICROPHENOS*

Groundmass - OLIVINE                   (  1.5%)
             PSEUDOMORPHED BY CLAY;

             PLAGIOCLASE               ( 43.1%)

             CLINOPYROXENE             ( 38.8%)

             OPAQUE MINERALS           (  4.6%)
             INCLUDES MAGN + ILMENITE;

             GLASS
             ALTERED TO AND COUNTED AS CLAY,PERCENTAGES
             OBTAINED BY POINT COUNT (1000 POINTS)*

Alteration - CLAY MINERALS             ( 12.0%)
             Replacing: TACHYLITE,GLASS,OL
             ALTERED TACHYLITE + GLASS + OL PROBABLY EQUALS
             ORIGINAL GLASS,PSEUDOMORPHS AFTER OL COUNTED AS
             OL*




Leg : 61    Top/Bottom Interval(mm): 1350/1370  Describer: Vallier, T.
Hole: 462A  Top of Core Depth(m)   :   985.00   Rock Type: IGNEOUS
Core:  79   Sample Midpoint(m)     :   987.86   Sect/Pc #:  2/PCE 4B

ROCK = OL-PLAG SPARSELY MICROPHYRIC BASALT;
       Texture: SPARSELY MICROPHYRIC,INTERSERTAL,INTERGRANULAR*

Phenocrysts- OLIVINE                   (   >1%)
             Size(mm):    0.2-0.5
             REPLACED BY CLAY,MICROPHENOS;

             PLAGIOCLASE               (   <1%)
             Size(mm):    0.1-0.3  Morphology: EUHEDRAL
             ZONED,MICROPHENOS;

             CLINOPYROXENE
             Size(mm):    0.1-0.2
             MICROPHENOS*

Groundmass - OLIVINE                   (  1.7%)
             REPLACED BY CLAY;

             PLAGIOCLASE               ( 41.8%)

             CLINOPYROXENE             ( 38.8%)

             OPAQUE MINERALS           (  7.4%)
             INCLUDES MAGN + ILMENITE;

             GLASS
             ALTERED TO AND COUNTED AS CLAY (ORIGINALLY
             TACHYLITE),PERCENTAGES OBTAINED BY POINT COUNT
             (1000 POINTS)*

Alteration - CARBONATE                 (  0.3%)
             Replacing: FEL,GLASS

             CLAY MINERALS             ( 10.0%)
             Replacing: GLASS,OL
             CLAY PSEUDOMORPHS AFTER OL COUNTED AS OL;

             ZEOLITE                   (    0%)




Leg : 61    Top/Bottom Interval(mm):  420/ 440  Describer: Vallier, T.
Hole: 462A  Top of Core Depth(m)   :   985.00   Rock Type: IGNEOUS
Core:  79   Sample Midpoint(m)     :   991.43   Sect/Pc #:  5/PCE 1C

ROCK = OL SPARSELY MICROPHYRIC BASALT;
       Texture: SPARSELY MICROPHYRIC,INTERGRANULAR;
       Where sampled: SILL INTERIOR*

Phenocrysts- OLIVINE                   (   >1%)
             Size(mm):    0.1-0.2
             MICROPHENOS*

Groundmass - OLIVINE                   (  1.4%)
             REPLACED BY CLAY;

             PLAGIOCLASE               ( 46.4%)

             CLINOPYROXENE             ( 38.3%)

             OPAQUE MINERALS           (  6.1%)
             INCLUDES MAGN + ILMENITE;

             GLASS
             REPLACED BY AND COUNTED UNDER CLAY,PERCENTAGES
             OBTAINED BY POINT COUNT (1000 POINTS)*

Alteration - CLAY MINERALS             (  7.8%)
             Location: INTERSTITIAL   Replacing: GLASS,OL




Leg : 61    Top/Bottom Interval(mm): 1350/1370  Describer: Vallier, T.
Hole: 462A  Top of Core Depth(m)   :   985.00   Rock Type: IGNEOUS
Core:  79   Sample Midpoint(m)     :   992.36   Sect/Pc #:  5/PCE 1J

ROCK = OL-PLAG-CPX MODERATELY MICROPHYRIC BASALT;
       Texture: MODERATELY MICROPHYRIC,INTERGRANULAR WITH
       VARIOLITIC CLOTS;
       Where sampled: NEAR BASE OF UNIT--FINER GRAINED MARGIN*

Phenocrysts- OLIVINE                   (  1-2%)
             Size(mm):    0.1-0.4
             ALTERED TO CLAY,MICROPHENOS;

             PLAGIOCLASE               (   <1%)
             Size(mm):    0.1-0.3
             MICROPHENOS;

             CLINOPYROXENE             (   <1%)
             Size(mm):  0.05-0.15
             MICROPHENOS*

Groundmass - OLIVINE                   (  2.2%)
             ALTERED TO CLAY;

             PLAGIOCLASE               ( 40.8%)

             CLINOPYROXENE             ( 43.5%)

             OPAQUE MINERALS           (  8.9%)
             INCLUDES MAGN + ILMENITE;

             GLASS                     (  4.6%)
             ALTERED TO CLAY,PERCENTAGES OBTAINED BY POINT
             COUNT (1000 POINTS)*

Alteration - CLAY MINERALS
             Location: INTERSTITIAL   Replacing: GLASS,OL
             PSEUDOMORPHS*




Leg : 61    Top/Bottom Interval(mm):  920/ 940  Describer: Seifert, K.
Hole: 462A  Top of Core Depth(m)   :   998.00   Rock Type: IGNEOUS
Core:  81   Sample Midpoint(m)     :   998.93   Sect/Pc #:  1/PCE 5C

ROCK = DOLERITE;
       Texture: INTERGRANULAR;
       Where sampled: FLOW OR SILL INTERIOR*

Groundmass - OLIVINE                   (  1.2%)
             Size(mm):    0.2-0.3
             CLAY POCKETS WITH EUHEDRAL OUTLINES;

             PLAGIOCLASE               ( 47.6%)
             Size(mm):  0.15X0.04
             DIMENSIONS= 0.15X0.04 MM;

             CLINOPYROXENE             ( 42.7%)
             Size(mm):       0.06

             OPAQUE MINERALS           (  5.9%)
             INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY
             POINT COUNT*

Alteration - CLAY MINERALS             (  2.6%)
             Replacing: OL
             CLAY POCKETS WITH EUHEDRAL OUTLINES*




Leg : 61    Top/Bottom Interval(mm):  580/ 600  Describer: Vallier, T.
Hole: 462A  Top of Core Depth(m)   :   998.00   Rock Type: IGNEOUS
Core:  81   Sample Midpoint(m)     :  1001.59   Sect/Pc #:  3/PCE 2A

ROCK = BASALT;
       Texture: INTERGRANULAR*

Phenocrysts- OLIVINE
             Size(mm):   0.2-0.45
             MICROPHENOS,ALTERED TO CLAY;

             PLAGIOCLASE
             Size(mm):    0.2-0.7
             PHENOS + MICROPHENOS;

             CLINOPYROXENE
             Size(mm):    0.1-0.3
             MICROPHENOS*

Groundmass - OLIVINE                   (  1.3%)
             ALTERED TO CLAY;

             PLAGIOCLASE               ( 43.2%)

             CLINOPYROXENE             ( 35.6%)

             OPAQUE MINERALS           ( 13.3%)
             INCLUDES MAGN + ILMENITE;

             GLASS
             ALTERED TO AND COUNTED AS CLAY,PERCENTAGES
             OBTAINED BY POINT COUNT (1000 POINTS)*

Alteration - CLAY MINERALS             (  6.6%)
             Location: INTERSTITIAL   Replacing: GLASS,OL




Leg : 61    Top/Bottom Interval(mm): 1380/1400  Describer: Vallier, T.
Hole: 462A  Top of Core Depth(m)   :  1005.50   Rock Type: IGNEOUS
Core:  84   Sample Midpoint(m)     :  1009.89   Sect/Pc #:  3/PCE 1F

ROCK = BASALT;
       Texture: INTERGRANULAR*

Phenocrysts- OLIVINE                   (   <1%)
             Size(mm):    0.1-0.2
             ALTERED TO CLAY,MICROPHENOS;

             PLAGIOCLASE
             Size(mm):    0.3-0.4
             MICROPHENOS;

             CLINOPYROXENE
             Size(mm):    0.3-0.4
             MICROPHENOS*

Groundmass - OLIVINE                   (  1.5%)
             ALTERED TO CLAY;

             PLAGIOCLASE               ( 50.7%)
             Size(mm):   0.05-0.1

             CLINOPYROXENE             ( 35.1%)
             Size(mm):   0.05-1.5

             OPAQUE MINERALS           (  7.2%)
             Size(mm):  0.03-0.05
             INCLUDES MAGN + ILMENITE;

             GLASS                     (    0%)
             PERCENTAGES OBTAINED BY POINT COUNT (1000 POINTS)*

Alteration - CLAY MINERALS             (  5.5%)
             Location: INTERSTITIAL   Replacing: GLASS,OL
             MOSTLY REPLACING INTERSTITIAL GLASS*




Leg : 61    Top/Bottom Interval(mm):  490/ 510  Describer: Seifert, K.
Hole: 462A  Top of Core Depth(m)   :  1005.50   Rock Type: IGNEOUS
Core:  84   Sample Midpoint(m)     :  1010.50   Sect/Pc #:  4/PCE 1D

ROCK = APHYRIC BASALT;
       Texture: APHYRIC,INTERSERTAL;
       Where sampled: FLOW INTERIOR*

Groundmass - PLAGIOCLASE               ( 38.5%)
             Size(mm):  0.15X0.04  Morphology: LATHS
             DIMENSIONS= 0.15X0.04 MM;

             CLINOPYROXENE             ( 21.5%)
             Size(mm):       0.10  Morphology: EQUIDIMENSIONAL
             BADLY ALTERED;

             OPAQUE MINERALS           (  4.3%)
             INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY
             POINT COUNT (1000 POINTS)*

Alteration - CLAY MINERALS             ( 35.7%)




Leg : 61    Top/Bottom Interval(mm):  750/ 770  Describer: Windom, K.
Hole: 462A  Top of Core Depth(m)   :  1005.50   Rock Type: IGNEOUS
Core:  84   Sample Midpoint(m)     :  1012.26   Sect/Pc #:  5/PCE 2

ROCK = DOLERITE;
       Texture: SUBOPHITIC;
       Where sampled: FLOW OR SILL INTERIOR*

Phenocrysts- OLIVINE
             PATCHES OF BROWN CLAY MAY BE PSEUDOMORPHS OF OL*

Groundmass - OLIVINE                   (    0%)

             PLAGIOCLASE               ( 42.6%)
             Size(mm):   0.05-0.6
             UNALTERED,ZONED;

             CLINOPYROXENE             ( 43.1%)
             Size(mm):   0.05-0.4
             GENERALLY FRESH;

             OPAQUE MINERALS           (  6.1%)
             Size(mm):   0.05-0.5
             INCLUDES MAGN + ILMENITE;

             GLASS
             ALTERED TO BROWN CLAY;

             ORTHOPYROXENE             (    0%)

             QUARTZ                    (    0%)

             ALKALI FELDSPAR           (    0%)
             PERCENTAGES OBTAINED BY POINT COUNT*

Alteration - CARBONATE                 (    0%)

             CLAY MINERALS             (  8.3%)
             Location: INTERSTITIAL,  Replacing: GLASS,OL
             Location: PATCHES
             BROWN,MAY BE PSEUDOMORPHS AFTER OL?,CONTAINS
             NUMEROUS OPAQUES;

             ZEOLITE                   (    0%)




Leg : 61    Top/Bottom Interval(mm):  830/ 850  Describer: Vallier, T.
Hole: 462A  Top of Core Depth(m)   :  1032.50   Rock Type: IGNEOUS
Core:  88   Sample Midpoint(m)     :  1034.84   Sect/Pc #:  2/PCE 1E

ROCK = OL SPARSELY PHYRIC BASALT;
       Texture: SPARSELY PORPHYRITIC,INTERGRANULAR*

Phenocrysts- OLIVINE                   (  1.6%)
             ALTERED TO CLAY*

Groundmass - PLAGIOCLASE               ( 50.0%)
             Size(mm):    0.2-0.3

             CLINOPYROXENE             ( 36.8%)
             Size(mm):    0.1-0.3

             OPAQUE MINERALS           (  4.2%)
             INCLUDES MAGN + ILMENITE;

             GLASS
             ALTERED TO AND COUNTED AS CLAY,ONE GLASSY ZONE
             ACROSS THIN SECTION,PERCENTAGES OBTAINED BY POINT
             COUNT (500 POINTS)*

Alteration - CLAY MINERALS             (  7.4%)
             Replacing: OL,GLASS




Leg : 61    Top/Bottom Interval(mm): 1190/1210  Describer: Windom, K.
Hole: 462A  Top of Core Depth(m)   :  1032.50   Rock Type: IGNEOUS
Core:  88   Sample Midpoint(m)     :  1035.20   Sect/Pc #:  2/PCE 1F

ROCK = DOLERITE;
       Texture: SUBOPHITIC;
       FLOW OR SILL INTERIOR*

Phenocrysts- OLIVINE                   (    0%)

             PLAGIOCLASE               (    0%)

             CLINOPYROXENE             (    0%)

             SPINEL                    (    0%)

Groundmass - PLAGIOCLASE               ( 45.9%)
             Size(mm):   0.05-0.5  Morphology: LATHS
             ZONED;

             CLINOPYROXENE             ( 36.0%)
             Size(mm):   0.03-0.3  Morphology: EQUIGRANULAR

             OPAQUE MINERALS           (  4.5%)
             INCLUDES MAGN + ILMENITE;

             GLASS                     (  1.8%)
             RELATIVELY FRESH--ALTERED GLASS COUNTED AS CLAY;

             ORTHOPYROXENE             (    0%)

             QUARTZ                    (    0%)

             ALKALI FELDSPAR           (   TR%)
             PERCENTAGES OBTAINED BY POINT COUNT (1000 POINTS)*

Alteration - CLAY MINERALS             ( 11.7%)
             Location: INTERSTITIAL   Replacing: GLASS




Leg : 61    Top/Bottom Interval(mm): 1250/1270  Describer: Seifert, K.
Hole: 462A  Top of Core Depth(m)   :  1032.50   Rock Type: IGNEOUS
Core:  88   Sample Midpoint(m)     :  1035.26   Sect/Pc #:  2/PCE 1F

ROCK = APHYRIC BASALT;
       Texture: APHYRIC,INTERGRANULAR;
       Where sampled: FLOW OR SILL INTERIOR*

Groundmass - PLAGIOCLASE               ( 54.0%)
             Size(mm):  0.18X0.14  Morphology: LATHS
             DIMENSIONS= 0.18X0.14 MM;

             CLINOPYROXENE             ( 32.6%)
             Size(mm):       0.08  Morphology: EQUIDIMENSIONAL

             OPAQUE MINERALS           (  2.6%)
             INCLUDES MAGN + ILMENITE;

             KFELDSPAR
             QUESTIONABLE,SOME INTERSTITIAL K-SPAR?
             INTERGROWTHS,PERCENTAGES OBTAINED BY POINT COUNT
             (500 POINTS)*

Alteration - CLAY MINERALS             ( 10.8%)




Leg : 61    Top/Bottom Interval(mm):  380/ 400  Describer: Vallier, T.
Hole: 462A  Top of Core Depth(m)   :  1036.50   Rock Type: IGNEOUS
Core:  89   Sample Midpoint(m)     :  1038.39   Sect/Pc #:  2/PCE 2B

ROCK = APHYRIC BASALT
       VEINED;
       Texture: APHYRIC,INTERSERTAL
       SOME VARIOLITIC TEXTURE IN PLACES,VEINED;
       Where sampled: NEXT TO GLASSY MARGIN*

Groundmass - OLIVINE                   (  0.2%)
             RARE,ALTERED TO CLAY;

             PLAGIOCLASE               ( 30.0%)
             Size(mm):  0.05-0.15

             CLINOPYROXENE             ( 31.2%)
             Size(mm):  0.05-0.10

             OPAQUE MINERALS           (  2.4%)
             INCLUDES MAGN + ILMENITE;

             GLASS                     (    0%)
             ALTERED TO AND COUNTED UNDER CLAY.MIN (ALTERED TO
             SMEC),PERCENTAGES OBTAINED BY POINT COUNT (500
             POINTS)--COUNT IS POOR BECAUSE OF ALTERED
             VARIOLITES OF CPX + GLASS*

Alteration - CARBONATE                 (  1.6%)
             Location: VEIN
             REPLACING A VEIN MINERAL?;

             CLAY MINERALS             ( 34.6%)
             Replacing: GLASS,OL
             PREDOMINANTLY REPLACING GLASS,GLASS IS NOW SMEC*




Leg : 61    Top/Bottom Interval(mm):  720/ 740  Describer: Windom, K.
Hole: 462A  Top of Core Depth(m)   :  1036.50   Rock Type: IGNEOUS
Core:  89   Sample Midpoint(m)     :  1038.73   Sect/Pc #:  2/PCE 5

ROCK = PLAG-CPX SPARSELY PHYRIC BASALT;
       Texture: SPARSELY PORPHYRITIC,VARIOLITIC
       A FEW PHENOS AND INTERGRANULAR AREAS;
       Where sampled: FLOW OR SILL INTERIOR*

Phenocrysts- PLAGIOCLASE               (    1%)
             Size(mm):    0.4-0.6

             CLINOPYROXENE             (    1%)
             Size(mm):    0.2-0.3
             MICROPHENOS*

Groundmass - PLAGIOCLASE               ( 19.8%)
             Size(mm):    0.1-0.2  Morphology: LATHS

             CLINOPYROXENE             ( 16.6%)
             Size(mm):   0.01-0.1  Morphology: EQUIGRANULAR
             PLAG + PYX OCCUR IN VERY FINE GRAINED VARIOLITIC
             PATCHES WHICH ARE HIGHLY ALTERED IN ADDITION TO
             THE ESSENTIALLY FRESH GRAINS REPRESENTED HERE;

             OPAQUE MINERALS           ( 12.4%)
             INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY
             POINT COUNT (500 POINTS)*

Alteration - CLAY MINERALS             ( 49.2%)
             Location: VARIOLES,      Replacing: GLASS,PYX,PLAG,OL
             Location: INTERSTITIAL
             VERY FINE GRAINED,MOSTLY REPLACING VARIOLES OF PYX
             + PLAG + GLASS*




Leg : 61    Top/Bottom Interval(mm):  240/ 260  Describer: Seifert, K.
Hole: 462A  Top of Core Depth(m)   :  1041.50   Rock Type: IGNEOUS
Core:  90   Sample Midpoint(m)     :  1041.75   Sect/Pc #:  1/PCE 2A

ROCK = APHYRIC BASALT;
       Texture: APHYRIC,INTERSERTAL;
       Where sampled: FLOW OR SILL INTERIOR*

Groundmass - PLAGIOCLASE               ( 48.6%)
             Size(mm):   0.3X0.04  Morphology: LATHS
             DIMENSIONS= 0.3X0.04 MM;

             CLINOPYROXENE             ( 33.8%)
             Size(mm):       0.18  Morphology: EQUIDIMENSIONAL

             OPAQUE MINERALS           (  6.0%)
             INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY
             POINT COUNT (500 POINTS)*

Alteration - CLAY MINERALS             ( 11.6%)




Leg : 61    Top/Bottom Interval(mm):  600/ 630  Describer: Seifert, K.
Hole: 462A  Top of Core Depth(m)   :  1041.50   Rock Type: IGNEOUS
Core:  90   Sample Midpoint(m)     :  1045.12   Sect/Pc #:  3/PCE 1F

ROCK = APHYRIC BASALT;
       Texture: APHYRIC,INTERSERTAL;
       Where sampled: FLOW OR SILL INTERIOR*

Phenocrysts- PLAGIOCLASE
             A FEW MICROPHENOS*

Groundmass - PLAGIOCLASE               ( 52.4%)
             Morphology: LATHS
             DIMENSIONS= 0.5X0.05 MM;

             CLINOPYROXENE             ( 34.0%)
             Size(mm):       0.16

             OPAQUE MINERALS           (  7.2%)
             INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY
             POINT COUNT (500 POINTS)*

Alteration - CLAY MINERALS             (  6.4%)
             PERHAPS SOME PSEUDOMORPHS AFTER OL*




Leg : 61    Top/Bottom Interval(mm):  400/ 420  Describer: Seifert, K.
Hole: 462A  Top of Core Depth(m)   :  1041.50   Rock Type: IGNEOUS
Core:  90   Sample Midpoint(m)     :  1047.91   Sect/Pc #:  5/PCE 2

ROCK = APHYRIC BASALT;
       Texture: APHYRIC,INTERSERTAL;
       Where sampled: FLOW OR SILL INTERIOR*

Groundmass - PLAGIOCLASE               ( 52.8%)
             Morphology: LATHS
             DIMENSIONS= 0.18X0.02;

             CLINOPYROXENE             ( 34.6%)
             Size(mm):       0.08  Morphology: EQUIDIMENSIONAL

             OPAQUE MINERALS           (  4.8%)
             INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY
             POINT COUNT (500 POINTS)*

Alteration - CLAY MINERALS             (  7.8%)




Leg : 61    Top/Bottom Interval(mm):  230/ 260  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   624.00   Rock Type: IGNEOUS
Core: B 1   Sample Midpoint(m)     :   624.24   Sect/Pc #:  1/PCE 2

ROCK = DOLERITE
       ALTERED,(BIT CORE);
       Texture: MICRODOLERITIC;
       Where sampled: SILL INTERIOR
       BUT OUT OF ORDER*

Phenocrysts- PLAGIOCLASE               (   TR%)

             CLINOPYROXENE             (   TR%)
             Size(mm):       <0.5
             AUGITE*

Groundmass - PLAGIOCLASE               (   30%)
             Size(mm):    0.1-0.3
             APPROX COMP AN55 ZONED TO AN25;

             CLINOPYROXENE             (   38%)
             Size(mm):      <0.25
             AUGITE;

             MAGNETITE                 (    5%)
             Size(mm):    0.1-0.3  Morphology: SUBHEDRAL
             TI-MAGN;

             GLASS                     (    7%)
             TOTALLY REPLACED INTERSTITIAL PATCHES;

             AMPHIBOLE                 (    5%)
             MINUTE NEEDLES REPLACING CPX*

Alteration - CLAY MINERALS             (   15%)
             Replacing: CPX,PLAG

             AMPHIBOLE                 (    5%)
             Replacing: CPX
             MINUTE NEEDLES REPLACING CPX*




Leg : 61    Top/Bottom Interval(mm):  400/ 430  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   624.00   Rock Type: IGNEOUS
Core: B 1   Sample Midpoint(m)     :   624.42   Sect/Pc #:  1/PCE 3

ROCK = DOLERITE
       ALTERED;
       Texture: MICRODOLERITIC;
       Where sampled: SILL INTERIOR
       BUT OUT OF POSITION*

Phenocrysts- CLINOPYROXENE             (   TR%)
             Size(mm):     TO 0.5
             AUGITE*

Groundmass - PLAGIOCLASE               (   20%)
             Size(mm):    0.1-0.3
             APPROX COMP AN60 ZONED TO AN30 (AN70 IS RARE);

             CLINOPYROXENE             (   35%)
             Size(mm):       <0.2
             AUGITE;

             MAGNETITE                 (   10%)
             Size(mm):      <0.20
             TI-MAGN;

             GLASS                     (   10%)
             TOTALLY REPLACED GLASS PATCHES;

             QUARTZ                    (   TR%)

             ALKALI FELDSPAR           (   TR%)

             AMPHIBOLE
             PERCENTAGE UNCERTAIN;

             APATITE                   (   TR%)

Alteration - COMBINATION               (   25%)
             BROWN CLAY + AMPH (TOTAL ALTERATION PRODUCTS);

             CLAY MINERALS

             AMPHIBOLE




Leg : 61    Top/Bottom Interval(mm):  100/ 120  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   690.00   Rock Type: IGNEOUS
Core: B 2   Sample Midpoint(m)     :   690.11   Sect/Pc #:  1/PCE 2

ROCK = CPX-PLAG MODERATELY MICROPHYRIC BASALT
       FRESH;
       Texture: MODERATELY MICROPHYRIC,INTERSERTAL-SPHERULITIC;
       Where sampled: MARGINAL ZONE OF SILL*

Phenocrysts- PLAGIOCLASE               (    1%)
             Size(mm):    0.1-0.3  Morphology: SUBHEDRAL
             APPROX COMP AN58,MICROPHENOS;

             CLINOPYROXENE             (    4%)
             Size(mm):    0.1-0.4  Morphology: SUBHEDRAL
             AUGITE*

Groundmass - PLAGIOCLASE               (   35%)
             Size(mm):       <0.4  Morphology: SUBHEDRAL-SKELETAL
             APPROX COMP AN60;

             CLINOPYROXENE             (   40%)
             Size(mm):       <0.2
             MUCH OF IT QUENCH TEXTURED;

             MAGNETITE                 (   10%)
             Size(mm):      <0.02

             GLASS                     (  3-4%)
             ONLY A FEW INTERSERTAL PATCHES*

Alteration - CLAY MINERALS             (   10%)
             Replacing: CPX,GLASS
             GREENISH BROWN*




Leg : 61    Top/Bottom Interval(mm):  900/ 920  Describer: Batiza, R.
Hole: 462A  Top of Core Depth(m)   :   690.00   Rock Type: IGNEOUS
Core: B 2   Sample Midpoint(m)     :   690.91   Sect/Pc #:  1/PCE 9

ROCK = DOLERITE
       RELATIVELY FRESH;
       Texture: SUBOPHITIC;
       Where sampled: INTERIOR OF SILL*

Groundmass - PLAGIOCLASE               (   37%)
             Size(mm):    0.3-0.7
             APPROX COMP AN58-60;

             CLINOPYROXENE             (   46%)
             Size(mm):    0.2-0.8  Morphology: SUBHEDRAL
             AUGITE;

             MAGNETITE                 (    5%)
             Size(mm):       <0.2
             TI-MAGN;

             GLASS                     (  1-2%)
             REPLACED BY CLAY + CHLORITE + AMPH,ALSO VARIOLITIC
             PATCHES;

             COMBINATION               (   TR%)
             INCLUDES GRANOPHYRIC PATCHES OF QUARTZ + ALK.SPAR;

             AMPHIBOLE                 ( TR-1%)

Alteration - COMBINATION               (   10%)
             Replacing: CPX
             INCLUDES CLAY+AMPH+CHLORITE,CLAY IS BROWNISH-GREEN;

             CHLORITE                  (   TR%)




    

Introduction


Cite as: Deep Sea Drilling Project (1989): Archive of Core and Site/Hole Data and Photographs from the Deep Sea Drilling Project (DSDP). National Geophysical Data Center, NOAA. doi:10.7289/V54M92G2 [access date]

These Web pages are from the Core Data from the Deep Sea Drilling Project Legs 1-96 CD-ROM produced in 1989 and modified in 2000 by the U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Environmental Satellite, Data, and Information Service, National Geophysical Data Center (now part of the National Centers for Environmental Information), and collocated World Data Center for Marine Geology and Geophysics, Boulder (now part of the World Data Service for Geophysics). Data were compiled in cooperation with the U.S. Science Support Program, of the Joint Oceanographic Institutions, Inc. (now the Consortium for Ocean Leadership), and the U.S. National Science Foundation.

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