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Core Data from the Deep Sea Drilling Project


Leg : 33    Top/Bottom Interval(mm): 1410/1430  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   905.50   Rock Type: IGNEOUS
Core:  31   Sample Midpoint(m)     :   906.92   Sect/Pc #:  1/

ROCK = AUGITE-PLAG MODERATELY PHYRIC BASALT
       MODERATELY ALTERED,SOURCE IS IR;
       Texture: MODERATELY PHYRIC,DIABASIC-INTERSERTAL*

Phenocrysts- PLAGIOCLASE               (    1%)
             Size(mm):       .4X1
             MICROPHENOS ALMOST ENTIRELY ALTERED TO
             MONTMORILLONITE;

             AUGITE                    (  1.5%)
             Size(mm):         .6
             MICROPHENOS FRESH*

Groundmass - PLAGIOCLASE
             PARTLY ALTERED;

             PYROXENE
             CONSISTS OF AUGITE AND CA-POOR AUGITE SLIGHTLY
             ALTERED TO MONTMORILLONITE;

             GLASS
             PART OF GROUNDMASS APPEARS TO HAVE BEEN GLASSY,
             INTERSERTAL BUT NOW IS COMPLETELY ALTERED TO BROWN
             MONTMORILLONITE,NO NEPHELINE OR K-FELDSPAR
             OBSERVED,ALL PERCENTAGES OBTAINED BY POINT COUNT
             (300 POINTS AVERAGE) AND ROUNDED TO NEAREST .5%*

Alteration - MONTMORILLONITE
             Location: VESICLES       Replacing: PLAG+GLASS

Vesicles   -
             Size(mm):    .5-10
             Percent:  24.5
             Filling: MONT
             AVERAGE SIZE 2MM,PARTIALLY TO COMPLETELY FILLED,
             GREEN MONT*




Leg : 33    Top/Bottom Interval(mm): 1440/1460  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   905.50   Rock Type: IGNEOUS
Core:  31   Sample Midpoint(m)     :   906.95   Sect/Pc #:  1/

ROCK = AUGITE-PLAG MODERATELY PHYRIC BASALT
       SAME AS 31-1-144-146 EXCEPT IN REFLECTED LIGHT
       TINY SKELETAL MAGNETITES SCATTERED THROUGH ROCK,
       SOME APPARENTLY ALTERED BY AN OPAQUE NONREFLECTIVE
       MATERIAL,ILMENITE LATHS PRESENT BUT NOT ABUNDANT;
       CHALCOPYRITE PRESENT AS TINY SPHERES AND VEINLETS,
       IN SOME CASES INTERGROWN WITH PYRRHOTITE,
       SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):  340/ 360  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   905.50   Rock Type: IGNEOUS
Core:  31   Sample Midpoint(m)     :   907.35   Sect/Pc #:  2/

ROCK = AUGITE MODERATELY PHYRIC BASALT
       HEAVILY ALTERED,SOURCE IS IR;
       Texture: MODERATELY PHYRIC,DIABASIC*

Phenocrysts- AUGITE                    (  6.5%)
             Size(mm):         .5
             ONLY THE PYX MICROPHENOS ESCAPE RATHER EXTENSIVE
             MONTMORILLONITE ALTERATION;

             PLAGIOCLASE               (    0%)

Groundmass - GROUNDMASS                ( 64.0%)
             Size(mm):        <.1

             PLAGIOCLASE

             PYROXENE
             PART OF GROUNDMASS PLAG AND MOST OF GROUNDMASS PYX
             IS ALTERED,VERY SIMILAR TO 31-1-141-143 EXCEPT FOR
             INCREASED MICROPHENO CONTENT AND SOMEWHAT GREATER
             DEGREE OF ALTERATION OF ROCK,NO NEPHELINE OR
             K-FELDSPAR*

Alteration - MONTMORILLONITE
             Location: VESICLES       Replacing: PLAG+AUGITE

Vesicles   -
             Size(mm):    .5-10
             Percent:  29.5
             Filling: MONT
             AVERAGE SIZE 2.5MM,GREEN MONT*




Leg : 33    Top/Bottom Interval(mm):  370/ 390  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   905.50   Rock Type: IGNEOUS
Core:  31   Sample Midpoint(m)     :   907.38   Sect/Pc #:  2/

ROCK = AUGITE MODERATELY PHYRIC BASALT
       MODERATELY ALTERED.SOURCE IS IR;
       Texture: MODERATELY PHYRIC,DIABASIC*

Phenocrysts- AUGITE                    (    6%)
             Size(mm):         .5
             UNALTERED*

Groundmass - PLAGIOCLASE
             MOST IS FRESH;

             PYROXENE
             CONSISTED OF AUGITE AND CA-POOR AUGITE AND IS
             PARTIALLY ALTERED TO MONTMORILLONITE,CONTAINED
             LESS GLASS THAN 31-1-141-143,VERY SIMILAR TO 31-1-
             141-143 EXCEPT THAT MICROPHENO COUNT REMAINS HIGH
             LIKE 31-2-34-36,BUT ROCK IS MUCH FRESHER,IN
             REFLECTED LIGHT IS SIMILAR TO 31-1-144-146 BUT
             SEVERAL GRAINS OF RED-BROWN CHROMITE OBSERVED*

Vesicles   -
             Size(mm):    .5-10
             Percent:    30
             AVERAGE SIZE 3MM,VESICLES AS IN 31-2-34-36*




Leg : 33    Top/Bottom Interval(mm):  240/ 260  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   905.50   Rock Type: IGNEOUS
Core:  31   Sample Midpoint(m)     :   908.75   Sect/Pc #:  3/

ROCK = AUGITE PHYRIC BASALT
       SOMEWHAT ALTERED,SOURCE IS IR;
       Texture: PHYRIC,INTERSERTAL*

Phenocrysts- AUGITE                    ( 11.5%)
             Size(mm):         .7
             FRESH*

Groundmass - GROUNDMASS                ( 83.5%)
             Size(mm):        <.3

             PYROXENE
             CONSISTS OF AUGITE AND CA-POOR AUGITE LARGELY
             UNALTERED;

             PLAGIOCLASE
             APPEARS FRESH BUT ALL FORMER INTERSERTAL GLASS IN
             GROUNDMASS HAS BEEN ALTERED TO BROWN
             MONTMORILLONITE,NO NEPHELINE OR K-FELDSPAR
             PRESENT*

Vesicles   -
             Size(mm):   .3-1.5
             Percent:     5
             Filling: MONT+CALCITE
             AVERAGE SIZE .5MM,VUGS LESS ABUNDANT THAN FLOW
             UNITS 1 AND 2,LINED WITH DARK BROWN
             MONTMORILLONITE AND PARTIALLY FILLED WITH GREEN
             MONTMORILLONITE,A FEW ROUND VESICLES ARE FILLED
             ONLY WITH CALCITE*




Leg : 33    Top/Bottom Interval(mm):  270/ 290  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   905.50   Rock Type: IGNEOUS
Core:  31   Sample Midpoint(m)     :   908.78   Sect/Pc #:  3/

ROCK = AUGITE PHYRIC BASALT
       SAME AS 31-3-24-26 EXCEPT IN REFLECTED LIGHT
       MAGNETITE IS SCATTERED EVENLY THROUGH THE ROCK,
       SOME APPARENTLY ALTERED BY AN OPAQUE NONREFLECTIVE
       MATERIAL,ILMENITE IS SPARSE AND OCCURS AS RARE
       LATHS,CHALCOPYRITE OCCURS AS TINY BLEBS AND LINES
       SOME VESICLE WALLS,SOME IS INTERGROWN WITH
       PYRRHOTITE*




Leg : 33    Top/Bottom Interval(mm):  980/1000  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   905.50   Rock Type: IGNEOUS
Core:  31   Sample Midpoint(m)     :   909.49   Sect/Pc #:  3/

ROCK = AUGITE MODERATELY PHYRIC BASALT
       SOMEWHAT ALTERED,SOURCE IS IR;
       Texture: MODERATELY PHYRIC,DIABASIC-INTERSERTAL*

Phenocrysts- AUGITE                    (  4.5%)
             Size(mm):          1
             FRESH*

Groundmass - GROUNDMASS                ( 83.5%)
             Size(mm):        <.2

             PYROXENE
             CONSISTS OF AUGITE AND CA-POOR AUGITE LARGELY
             UNALTERED;

             PLAGIOCLASE
             FRESH,ROCK CONTAINED LESS INTERSERTAL GLASS THAN
             31-3-24-26 BUT IT IS ALTERED TO BROWN
             MONTMORILLONITE*

Alteration - MONTMORILLONITE
             Location: VUGS           Replacing: GLASS

             CALCITE
             Location: VESICLES

Vesicles   -
             Size(mm):     .2-1
             Percent:    12
             Filling: CALCITE+MONT
             AVERAGE SIZE .3MM,VUGS ARE SMALLER BUT MORE
             ABUNDANT THAN IN 31-3-27-29 BUT PARTIALLY FILLED
             IN THE SAME MANNER BY GREEN MONTMORILLONITE,
             CALCITE PARTIALLY TO COMPLETELY FILLS VESICLES*




Leg : 33    Top/Bottom Interval(mm): 1010/1030  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   905.50   Rock Type: IGNEOUS
Core:  31   Sample Midpoint(m)     :   909.52   Sect/Pc #:  3/

ROCK = AUGITE MODERATELY PHYRIC BASALT
       SAME AS 31-3-98-100 EXCEPT IN REFLECTED LIGHT
       MAGNETITE IS SCATTERED EVENLY THROUGH ROCKS,
       APPARENTLY ALTERED BY AN OPAQUE,NONREFLECTIVE
       MATERIAL,ILMENITE AND CHALCOPYRITE PRESENT BUT
       VERY SPARSE, SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):  770/ 790  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   905.50   Rock Type: IGNEOUS
Core:  31   Sample Midpoint(m)     :   910.78   Sect/Pc #:  4/

ROCK = APHYRIC BASALT
       SOMEWHAT ALTERED,SOURCE IS IR;
       Texture: APHYRIC,DIABASIC-INTERSERTAL*

Groundmass - GROUNDMASS                ( 83.5%)
             Size(mm):        <.4

             PYROXENE
             CONSISTS OF AUGITE AND CA-POOR AUGITE,UNALTERED;

             PLAGIOCLASE
             Morphology: LATHS
             FRESH,GROUNDMASS GLASS,WHERE ONCE PRESENT,IS
             ALTERED TO BROWN MONTMORILLONITE;

             QUARTZ
             A SMALL AMOUNT IS PRESENT INTERSERTALLY BETWEEN
             PLAG LATHS,NO NEPHELINE OR K-FELDSPAR PRESENT*

Alteration - MONTMORILLONITE
             Location: VUGS           Replacing: GLASS

             CALCITE
             Location: VESICLES

Vesicles   -
             Size(mm):      1-5
             Percent:  16.5
             Filling: MONT+CALCITE
             AVERAGE SIZE 2MM,VUGS ARE LINED WITH BROWN
             MONTMORILLONITE AND GENERALLY FILLED WITH GREEN
             MONTMORILLONITE,SOME CALCITE IS IN THE CENTERS OF
             VESICLES*




Leg : 33    Top/Bottom Interval(mm):  800/ 820  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   905.50   Rock Type: IGNEOUS
Core:  31   Sample Midpoint(m)     :   910.81   Sect/Pc #:  4/

ROCK = AUGITE MODERATELY PHYRIC BASALT
       IN REFLECTED LIGHT MUCH LIKE 31-3-101-103 BUT
       CONSIDERABLY MORE CHALCOPYRITE IS PRESENT AND A
       FEW RED-BROWN CHROMITES OCCUR IN THE SECTION,
       QUARTZ IDENTIFIED FROM VESICLE FILLING BY X-RAY,
       BUT NOT SEEN IN THIN SECTION,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):    0/   0  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   905.50   Rock Type: IGNEOUS
Core:  31   Sample Midpoint(m)     :   911.60   Sect/Pc #: CC/

ROCK = AUGITE-CA-POOR AUGITE-PLAG PHYRIC BASALT
       MODERATELY ALTERED,SOURCE IS IR;
       Texture: MODERATELY PHYRIC,DIABASIC-INTERSERTAL*

Phenocrysts- PLAGIOCLASE               (  1.5%)
             Size(mm):         .6

             AUGITE                    (  6.5%)

             AUGITE                    (  2.0%)
             CA-POOR AUGITE,PYX MICROPHENOS UNALTERED*

Groundmass - GROUNDMASS                (   81%)
             Size(mm):        <.4

             PYROXENE
             CONSISTS OF AUGITE AND CA-POOR AUGITE UNALTERED;

             PLAGIOCLASE
             VERY SPARSELY ALTERED TO MONTMORILLONITE;

             GLASS
             GROUNDMASS GLASS IS COMPLETELY ALTERED TO BROWN
             MONTMORILLONITE,IDENTICAL TO 31-4-80-82 EXCEPT FOR
             MICROPHENOS*

Alteration - MONTMORILLONITE
             Location: VESICLES       Replacing: PLAG+GLASS

             CALCITE
             Location: VESICLES

Vesicles   -
             Size(mm):     .6-4
             Percent:     9
             Filling: MONT,CALCITE
             AVERAGE SIZE 1.25MM,GREEN MONT*




Leg : 33    Top/Bottom Interval(mm):    0/   0  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   905.50   Rock Type: IGNEOUS
Core:  31   Sample Midpoint(m)     :   911.60   Sect/Pc #: CC/

ROCK = CPX MICROPHYRIC BASALT
       SOURCE IS SHIPBOARD DESCRIPTION;
       Texture: AUGITE MICROPHYRIC, DIABASIC TO INTERSERTAL
       GROUNDMASS*

Phenocrysts- AUGITE                    ( 12.5%)
             Size(mm):      .5-.7
             AVG SIZE .6MM,HIGH BIREFRINGENCE,APPEARS TO BE
             AUGITE*

Groundmass - AUGITE                    (   15%)

             PLAGIOCLASE               (   40%)
             Morphology: LATH-LIKE

             PIGEONITE                 (   10%)
             BOTH AUGITE AND PIGEONITE FORM
             DIABASIC AGGREGATES CONTAINING
             FELDSPAR,PIGEONITE IDENTIFIED
             BY LOW BIREFRINGENCE AND SMALL
             + 2V;

             GLASS                     ( 12.5%)
             GLASS IN TRIANGULAR PATCHES BETWEEN PLAG,APPEARS
             TO BE ENTIRELY ALTERED TO PALAG MATERIAL;

             OPAQUE MINERALS           (   >5%)
             LOCALIZED NEAR GLASS*

Alteration - CALCITE                   (   TR%)

             ZEOLITE

             PALAGONITE
             Replacing: GLASS

             CHLOROPHAEITE
             GREEN ALTERATION MAY BE CHLOROPHAEITE?*

Vesicles   -
             Size(mm):  0.6-4.0
             Location:           ZEO
             Filling: L,CALCITE,  IRR
             Shape: EGULAR-

             Location:           OTH
             Filling: ER          ROU
             Shape: NDED
             AVG 1.25MM, COMPLETELY FILLED, MOSTLY BY GREEN
             FIBROUS TO GRANULAR MATERIAL THAT APPEARS VERY DARK
             GREEN IN HAND SAMPLES, A FEW ZEOLITES PRESENT
             IN VESICLES AND A VERY SMALL AMOUNT OF CALCITE,
             ROCK IS VESICULAR*




Leg : 33    Top/Bottom Interval(mm):  810/ 830  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   915.82   Sect/Pc #:  1/

ROCK = AUGITE-PLAG-CA-POOR AUGITE MOD PHRYRIC BASALT
       SOMEWHAT ALTERED,SOURCE IS IR;
       Texture: MODERATELY PHYRIC,DIABASIC-INTERSERTAL*

Phenocrysts- PLAGIOCLASE               (  1.5%)
             Size(mm):         .5

             AUGITE                    (  3.5%)
             FRESH;

             AUGITE                    (  1.0%)
             CA-POOR AUGITE*

Groundmass - GROUNDMASS                ( 75.5%)
             Size(mm):        <.4

             PYROXENE
             UNALTERED;

             PLAGIOCLASE
             Morphology: LATHS
             FRESH;

             GLASS
             GROUNDMASS FORMERLY GLASS IS COMPLETELY ALTERED TO
             BROWN MONTMORILLONITE,NO NEPHELINE OR K-FELDSPAR*

Alteration - MONTMORILLONITE
             Location: VESICLES+VUGS  Replacing: GLASS

             CALCITE
             Location: VESICLES

Vesicles   -
             Size(mm):      1-8
             Percent:  18.5
             Filling: MONT+CALCITE
             AVERAGE SIZE 2MM,VESICLES AND VUGS HAVE RIMS OF
             BROWN MONTMORILLONITE,PARTIALLY FILLED WITH GREEN
             MONTMORILLONITE AND CALCITE*




Leg : 33    Top/Bottom Interval(mm):  840/ 860  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   915.85   Sect/Pc #:  1/

ROCK = AUGITE-PLAG-CA-POOR AUGITE MOD PHRYRIC BASALT
       SAME AS 32-1-81-83 EXCEPT MAGNETITE IS SCATTERED
       EVENLY THROUGH THE ROCK AND CONTAINS A FEW BLEBS
       OF EXSOLVED ILMENITE, IS PARTLY ALTERED TO AN
       OPAQUE,NONREFLECTIVE MATERIAL,ILMENITE LATHS AND
       CHALCOPYRITE BLEBS PRESENT,BUT ARE NOT ABUNDANT,
       SOME CHALCOPYRITE IS INTERGROWN WITH PYRRHOTITE,
       SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):  720/ 740  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   917.23   Sect/Pc #:  2/

ROCK = AUGITE-CA-POOR AUGITE MODERATELY PHYRIC BASALT
       SOURCE IS IR;
       Texture: MODERATELY PHYRIC,DIABASIC-INTERSERTAL*

Phenocrysts- AUGITE                    (  5.5%)
             Size(mm):         .5

             AUGITE                    (    2%)
             CA-POOR AUGITE*

Groundmass - GROUNDMASS                (   80%)
             Size(mm):        <.4
             SAME AS 32-1-81-83*

Vesicles   -
             Size(mm):     .5-3
             Percent:  12.5
             AVERAGE SIZE 1MM*




Leg : 33    Top/Bottom Interval(mm):  750/ 770  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   917.26   Sect/Pc #:  2/

ROCK = AUGITE-CA-POOR AUGITE MODERATELY PHYRIC BASALT
       SAME AS 32-2-72-74 EXCEPT NO CALCITE NOTED,ALSO
       SAME AS 32-1-84-86 EXCEPT MAGNETITE DOES NOT
       EXSOLVE ILMENITE,IS LESS ALTERED,AND MORE ILMENITE
       IS PRESENT IN THE ROCK,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):  835/ 840  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   918.84   Sect/Pc #:  3/

ROCK = AUGITE-CA-POOR AUGITE MODERATELY PHYRIC BASALT
       SAME AS 32-2-72-74 AND 32-2-75-77,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):  840/ 850  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   918.85   Sect/Pc #:  3/

ROCK = AUGITE-CA-POOR AUGITE MICROPHYRIC BASALT
       SOURCE IS IR;
       Texture: MICROPHYRIC,DIABASIC-INTERSERTAL*

Phenocrysts- AUGITE                    (  5-9%)

             AUGITE                    (  5-9%)
             CA-POOR AUGITE,VARIABILITY OF MICROPHENOS MORE
             APPARENT THAN REAL DUE TO THE DEFINITION OF
             MICROPHENOS AS BEING LESS THAN .5MM IN SIZE*

Groundmass - PLAGIOCLASE

             PYROXENE
             PYX/PLAG RATIO IS CONSTANT*
             ALTERATION IS AS DESCRIBED IN 32-1-81-83 AND 32-3-
             103-105*

Vesicles   -
             Percent:  9-15
             CONTENT VARIES DEPENDING ON WHETHER THE LARGER
             VUGS ARE PRESENT IN CERTAIN SECTIONS*




Leg : 33    Top/Bottom Interval(mm):  850/ 860  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   918.85   Sect/Pc #:  3/

ROCK = AUGITE-CA-POOR AUGITE MICROPHYRIC BASALT
       SAME AS 32-3-84-85,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):  860/ 880  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   918.87   Sect/Pc #:  3/

ROCK = AUGITE-CA-POOR AUGITE MICROPHYRIC BASALT
       SAME AS 32-3-84-85,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):  870/ 890  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   918.88   Sect/Pc #:  3/

ROCK = AUGITE-CA-POOR AUGITE MICROPHYRIC BASALT
       SAME AS 32-3-84-85.X-RAY DIFFRACTION SHOWS PLAG,
       PYX AND MONTMORILLONITE,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):  900/ 915  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   918.91   Sect/Pc #:  3/

ROCK = AUGITE-CA-POOR AUGITE MICROPHYRIC BASALT
       SAME AS 32-3-84-85,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):  915/ 930  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   918.92   Sect/Pc #:  3/

ROCK = AUGITE-CA-POOR AUGITE MICROPHYRIC BASALT
       SAME AS 32-3-84-85,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):  930/ 945  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   918.94   Sect/Pc #:  3/

ROCK = AUGITE-CA-POOR AUGITE MICROPHYRIC BASALT
       SAME AS 32-3-84-85,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):  945/ 960  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   918.95   Sect/Pc #:  3/

ROCK = AUGITE-CA-POOR AUGITE MICROPHYRIC BASALT
       SAME AS 32-3-84-85,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):  960/ 978  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   918.97   Sect/Pc #:  3/

ROCK = AUGITE-CA-POOR AUGITE MICROPHYRIC BASALT
       SAME AS 32-3-84-85,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):  985/ 993  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   918.99   Sect/Pc #:  3/

ROCK = AUGITE-CA-POOR AUGITE MICROPHYRIC BASALT
       SAME AS 32-3-84-85,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):  993/1000  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   919.00   Sect/Pc #:  3/

ROCK = AUGITE-CA-POOR AUGITE MICROPHYRIC BASALT
       SAME AS 32-3-84-85,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm): 1030/1050  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   919.04   Sect/Pc #:  3/

ROCK = AUGITE-CA-POOR AUGITE MODERATELY PHYRIC BASALT
       SOMEWHAT ALTERED,SOURCE IS IR*
       Texture: MODERATELY PHYRIC,DIABASIC-INTERSERTAL*

Phenocrysts- AUGITE                    (    5%)
             Size(mm):         .5
             UNALTERED;

             AUGITE                    (    2%)
             CA-POOR AUGITE*

Groundmass - GROUNDMASS                ( 83.5%)
             Size(mm):        <.4

             PYROXENE
             CONSISTS OF AUGITE AND CA-POOR AUGITE AND IS
             UNALTERED;

             PLAGIOCLASE
             FRESH;

             GLASS
             FORMER GROUNDMASS GLASS IS ALTERED TO BROWN
             MONTMORILLONITE*

Vesicles   -
             Size(mm):     .5-7
             Percent:     9
             Filling: MONT+CALCITE
             AVERAGE SIZE 1MM,FILLED WITH BROWN MONTMORILLONITE
             RIMS,GREEN MONTMORILLONITE,AND CALCITE CORES*




Leg : 33    Top/Bottom Interval(mm): 1060/1080  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   919.07   Sect/Pc #:  3/

ROCK = AUGITE-CA-POOR AUGITE MODERATELY PHYRIC BASALT
       SAME AS 32-3-103-105 EXCEPT IN REFLECTED LIGHT
       OPAQUE MINERALS SCATTERED THROUGH SECTION EVENLY,
       BUT NOW CONSISTS OF COMPLEX MAGNETITE-ILMENITE
       INTERGROWTHS,NO FREE ILMENITE OBSERVED,VERY MINOR
       CHALCOPYRITE BLEBS PRESENT,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm): 1115/1120  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   919.12   Sect/Pc #:  3/

ROCK = AUGITE-CA-POOR AUGITE MODERATELY PHYRIC BASALT
       SAME AS 32-3-103-105 AND SAME AS 32-3-106-108
       EXCEPT VERY MINOR AMOUNTS OF FREE ILMENITE WERE
       OBSERVED,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):  730/ 750  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   920.24   Sect/Pc #:  4/

ROCK = APHYRIC BASALT
       MODERATELY ALTERED,SOURCE IS IR;
       Texture: APHYRIC,INTERSERTAL DIABASIC*

Groundmass - PYROXENE
             AUGITE AND CA-POOR AUGITE,SLIGHTLY ALTERED TO
             MONTMORILLONITE;

             PLAGIOCLASE
             SLIGHTLY ALTERED TO MONTMORILLONITE;

             GLASS
             FORMER INTERSERTAL GLASS IS MUCH MORE ABUNDANT
             THAN IN PREVIOUS SECTIONS OF THIS FLOW UNIT,
             COMPLETELY ALTERED TO MONTMORILLONITE*

Alteration - MONTMORILLONITE
             Location: VUGS           Replacing: PYX+PLAG+GLASS

             CALCITE
             Location: VUGS

Vesicles   -
             Size(mm):     1-10
             Percent:  23.5
             AVERAGE SIZE 6MM,VUGS ARE VERY LARGE AND ALTERED
             TO MONTMORILLONITE AND CALCITE*




Leg : 33    Top/Bottom Interval(mm):  760/ 780  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   920.27   Sect/Pc #:  4/

ROCK = BASALT
       IN REFLECTED LIGHT MAGNETITE IS SCATTERED EVENLY
       THROUGH THE ROCK,VERY LITTLE EXSOLVING ILMENITE,
       MAGNETITE IS PARTLY ALTERED TO OPAQUE,
       NONREFLECTIVE MATERIAL,ILMENITE BLADES AND
       CHALCOPYRITE BLEBS ARE VERY SPARSE,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm): 1230/1250  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   920.74   Sect/Pc #:  4/

ROCK = APHYRIC BASALT
       SOMEWHAT ALTERED,SOURCE IS IR;
       Texture: APHYRIC,DIABASIC-INTERSERTAL*

Groundmass - PYROXENE
             AUGITE AND CA-POOR AUGITE,FRESH;

             FELDSPAR
             FRESH;

             GLASS
             FORMER INTERSERTAL GLASS IS SOMEWHAT LESS ABUNDANT
             THAN IN FLOW UNIT 5,BUT COMPLETELY ALTERED TO
             BROWN MONTMORILLONITE,NO NEPHELINE OR K-FELDSPAR*

Alteration - MONTMORILLONITE
             Location: VESICLES       Replacing: GLASS

             CALCITE                   (    0%)
             NONE SEEN IN X-RAY DIFFRACTION OR OPTICALLY*

Vesicles   -
             Size(mm):     .5-2
             Percent:     6
             Filling: MONT
             AVERAGE SIZE 1MM,GREEN MONT*




Leg : 33    Top/Bottom Interval(mm): 1260/1280  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   920.77   Sect/Pc #:  4/

ROCK = APHYRIC BASALT
       SAME AS 32-4-123-125 EXCEPT IN REFLECTED LIGHT
       COMPLEX MAGNETITE-ILMENITE INTERGROWTHS ARE
       SCATTERED EVENLY THROUGHOUT THE ROCK,A VERY FEW
       ILMENITE LATHS ARE SEEN IN FORMERLY GLASSY AREAS,
       VERY SPARSE TINY BLEBS OF CHALCOPYRITE,SOME ARE
       INTERGROWN WITH PYRRHOTITE,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):  920/ 940  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   921.93   Sect/Pc #:  5/

ROCK = APHYRIC BASALT
       SOURCE IS IR;
       Texture: APHYRIC,DIABASIC-INTERSERTAL*

Groundmass - GROUNDMASS                (   94%)
             Size(mm):        <.4
             SAME AS 32-4-123-125*

Vesicles   -
             Size(mm):     .5-2
             Percent:     6
             AVERAGE SIZE 1MM*




Leg : 33    Top/Bottom Interval(mm):  950/ 970  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   921.96   Sect/Pc #:  5/

ROCK = APHYRIC BASALT
       SAME AS 32-5-92-94 AND 32-4-126-128*




Leg : 33    Top/Bottom Interval(mm): 1030/1050  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   922.04   Sect/Pc #:  5/

ROCK = APHYRIC BASALT
       SAME AS 32-5-92-96 AND 32-4-126-128,
       X-RAY DIFFRACTION PATTERN SHOWS PLAG,PYX,MAGN AND
       MONTMORILLONITE,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm): 1100/1120  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   923.61   Sect/Pc #:  6/

ROCK = APHYRIC BASALT
       SOURCE IS IR;
       Texture: APHYRIC,DIABASIC-INTERSERTAL*

Groundmass - GROUNDMASS                ( 89.5%)
             Size(mm):        <.4
             SAME AS 32-4-123-125 BUT AMOUNT OF ALTERED
             INTERSERTAL GLASS IS SOMEWHAT LESS*

Vesicles   -
             Size(mm):     .5-2
             Percent:  10.5
             AVERAGE SIZE 1MM,SAME AS 32-4-123-125 BUT SLIGHTLY
             MORE VESICULAR*




Leg : 33    Top/Bottom Interval(mm): 1130/1150  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   923.64   Sect/Pc #:  6/

ROCK = APHYRIC BASALT
       SAME AS 32-6-110-112 AND 32-4-126-128,
       SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm): 1150/1170  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   923.66   Sect/Pc #:  6/

ROCK = APHYRIC BASALT
       SOURCE IS IR;
       Texture: APHYRIC,DIABASIC-INTERSERTAL*

Groundmass - GROUNDMASS                ( 89.5%)
             Size(mm):        <.4

             PLAGIOCLASE
             X-RAY DETERMINATION-AVERAGE COMP AN73.5*
             SAME AS 32-6-110-112 BUT THE AMOUNT OF ALTERED
             INTERSERTAL GLASS IS <5%*

Vesicles   -
             Size(mm):     .5-2
             Percent:  10.5
             AVERAGE SIZE 1MM.SAME AS 32-6-110-112 BUT VESICLES
             ARE MORE ABUNDANT IN THIS PART OF THE FLOW UNIT*




Leg : 33    Top/Bottom Interval(mm):    0/   0  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   915.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   924.10   Sect/Pc #: CC/

ROCK = APHYRIC BASALT
       SOURCE IS IR;
       Texture: APHYRIC,DIABASIC INTERSERTAL*

Groundmass - GROUNDMASS                ( 91.5%)
             Size(mm):        <.4
             SAME AS 32-6-115-117 BUT SMALL CALCITE VEIN CUTS
             SAMPLE,CALCITE ALSO FOLLOWS SOME VESICLE WALLS
             AND OCCURS AS REPLACEMENT PATCHES LOCALLY*
             AVERAGE SIZE 1MM*

Vesicles   -
             Size(mm):     .5-2
             Percent:   8.5




Leg : 33    Top/Bottom Interval(mm):  370/ 390  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   924.50   Rock Type: IGNEOUS
Core:  33   Sample Midpoint(m)     :   924.88   Sect/Pc #:  1/

ROCK = APHYRIC BASALT
       SAME FLOW UNIT AS 33-1-135-137,
       X-RAY DIFFRACTION PATTERN SHOWS PLAG+PYX+
       MONTMORILLONITE*




Leg : 33    Top/Bottom Interval(mm): 1350/1370  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   924.50   Rock Type: IGNEOUS
Core:  33   Sample Midpoint(m)     :   925.86   Sect/Pc #:  1/

ROCK = APHYRIC BASALT
       SOMEWHAT ALTERED,SOURCE IS IR;
       Texture: APHYRIC,DIABASIC-INTERSERTAL*

Groundmass - GROUNDMASS                ( 91.5%)
             Size(mm):        <.4

             PYROXENE
             AUGITE AND CA-POOR AUGITE,FRESH;

             FELDSPAR
             FRESH;

             GLASS                     (    5%)
             FORMER GROUNDMASS GLASS ALTERED TO BROWN
             MONTMORILLONITE,NO NEPHELINE OR K-FELDSPAR*

Alteration - CALCITE                   (    0%)
             NONE SEEN IN THE SECTION OR X-RAY DIFFRACTION
             PATTERN*

Vesicles   -
             Size(mm):     .5-2
             Percent:   8.5
             Filling: MONT
             AVERAGE SIZE 1MM,GREEN MONT*




Leg : 33    Top/Bottom Interval(mm): 1380/1400  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   924.50   Rock Type: IGNEOUS
Core:  33   Sample Midpoint(m)     :   925.89   Sect/Pc #:  1/

ROCK = APHYRIC BASALT
       SAME AS 33-1-135-137 EXCEPT IN REFLECTED LIGHT
       COMPLEX MAGNETITE ILMENITE INTERGROWTHS ARE
       SCATTERED THROUGHOUT THE ROCK,A VERY FEW ILMENITE
       LATHS ARE PRESENT IN FORMERLY GLASSY AREAS,
       SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):  790/ 810  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   924.50   Rock Type: IGNEOUS
Core:  33   Sample Midpoint(m)     :   926.80   Sect/Pc #:  2/

ROCK = APHYRIC BASALT
       SOURCE IS IR;
       Texture: APHYRIC,DIABASIC INTERSERTAL*

Groundmass - GROUNDMASS                ( 91.5%)
             Size(mm):        <.4
             SAME AS 33-1-135-137*

Vesicles   -
             Size(mm):     .5-2
             Percent:   8.5
             AVERAGE SIZE 1MM*




Leg : 33    Top/Bottom Interval(mm):  820/ 840  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   924.50   Rock Type: IGNEOUS
Core:  33   Sample Midpoint(m)     :   926.83   Sect/Pc #:  2/

ROCK = APHYRIC BASALT
       SAME AS 33-2-79-81,SOURCE IS IR*
             SAME AS 33-1-138-140 EXCEPT X-RAY VESICLE FILLING
             SHOWS POSSIBLE CELADONITE*




Leg : 33    Top/Bottom Interval(mm):  910/ 930  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   924.50   Rock Type: IGNEOUS
Core:  33   Sample Midpoint(m)     :   928.42   Sect/Pc #:  3/

ROCK = APHYRIC BASALT
       MODERATELY ALTERED,SOURCE IS IR;
       Texture: APHYRIC,DIABASIC-INTERSERTAL*

Groundmass - GROUNDMASS                (   91%)
             Size(mm):        <.4

             PYROXENE
             AUGITE AND CA-POOR AUGITE FRESH;

             PLAGIOCLASE
             FRESH;

             GLASS
             FORMER GROUNDMASS GLASS IS MORE ABUNDANT THAN
             33-1-135-137 AND 33-2-79-81 AND COMPLETELY ALTERED
             TO BROWN MONTMORILLONITE*

Alteration - MONTMORILLONITE
             Location: VESICLES       Replacing: GLASS

             CALCITE                   (    0%)
             NONE SEEN IN SECTION OR X-RAY DIFFRACTION PATTERN*

Vesicles   -
             Size(mm):   .5-1.5
             Percent:     9
             Filling: MONT
             AVERAGE SIZE .8MM,GREEN MONT*




Leg : 33    Top/Bottom Interval(mm):  940/ 960  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   924.50   Rock Type: IGNEOUS
Core:  33   Sample Midpoint(m)     :   928.45   Sect/Pc #:  3/

ROCK = APHYRIC BASALT
       SAME AS 33-3-91-93 EXCEPT IN REFLECTED LIGHT
       OPAQUES ARE ABOUT EQUALLY DIVIDED BETWEEN COMPLEX
       MAGNETITE-ILMENITE INTERGROWTHS,FREE ILMENITE,AND
       FREE PINKISH MAGNETITE,VERY SPARSE CHALCOPYRITE
       BLEBS,SOME ARE INTERGROWN WITH PYRRHOTITE,
       SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm): 1020/1040  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   924.50   Rock Type: IGNEOUS
Core:  33   Sample Midpoint(m)     :   928.53   Sect/Pc #:  3/

ROCK = APHYRIC BASALT
       SOURCE IS IR;
       Texture: APHYRIC,DIABASIC-INTERSERTAL*

Groundmass - GROUNDMASS                ( 94.5%)
             Size(mm):        <.3
             IN REFLECTED LIGHT IS SIMILAR TO 33-3-94-96 BUT
             FINER GRAINED*
             SAME AS 33-3-91-93 BUT CONTAINS CONSIDERABLY LESS
             ALTERED GROUNDMASS GLASS,AND IS FINER GRAINED*

Vesicles   -
             Size(mm):   .5-1.5
             Percent:   5.5
             AVERAGE SIZE .8MM.SAME AS 33-3-91-93 BUT CONTAINS
             LESS VESICLES*




Leg : 33    Top/Bottom Interval(mm): 1100/1140  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   924.50   Rock Type: SEDIMENTARY
Core:  33   Sample Midpoint(m)     :   928.62   Sect/Pc #:  3/

ROCK = SILTSTONE;
       SOURCE IS IR;
       Texture: HORNFELS
       COHERENT,PARTIALLY BAKED SILTSTONE WITH INCIPIENT
       HORNFELS TEXTURE*

Groundmass - COMBINATION
             X-RAY MINERALOGY(IN ORDER OF ABUNDANCE):PLAG,PYX,
             HEULANDITE,MONTMORILLONITE,QUARTZ,CELADONITE,AND
             PYRITE*




Leg : 33    Top/Bottom Interval(mm): 1240/1280  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   924.50   Rock Type: SEDIMENTARY
Core:  33   Sample Midpoint(m)     :   928.76   Sect/Pc #:  3/

ROCK = SILTSTONE
       COHERENT,PARTIALLY BAKED,SOURCE IS IR*
             X-RAY MINERALOGY(IN ORDER OF DECREASING
             ABUNDANCE):PLAG,PYX,CELADONITE,MONTMORILLONITE,
             QUARTZ,AND PYRITE*




Leg : 33    Top/Bottom Interval(mm): 1300/1320  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   924.50   Rock Type: SEDIMENTARY
Core:  33   Sample Midpoint(m)     :   928.81   Sect/Pc #:  3/

ROCK = SILTSTONE
       COHERENT,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm): 1410/1450  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   924.50   Rock Type: SEDIMENTARY
Core:  33   Sample Midpoint(m)     :   928.93   Sect/Pc #:  3/

ROCK = CLAYSTONE
       SOURCE IS IR*

Groundmass - COMBINATION
             X-RAY MINERALOGY(IN ORDER OF DECREASING
             ABUNDANCE):MONTMORILLONITE,QUARTZ,PLAG,PYX,AND
             PYRITE*




Leg : 33    Top/Bottom Interval(mm):  280/ 300  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   924.50   Rock Type: SEDIMENTARY
Core:  33   Sample Midpoint(m)     :   929.29   Sect/Pc #:  4/

ROCK = CLAYSTONE
       SOURCE IS IR*

Groundmass - COMBINATION
             IN ORDER OF DECREASING ABUNDANCE:MONTMORILLONITE,
             CALCITE,PLAG,PYX,PYRITE,AND MAGNETITE*




Leg : 33    Top/Bottom Interval(mm): 1000/1020  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   924.50   Rock Type: IGNEOUS
Core:  33   Sample Midpoint(m)     :   930.01   Sect/Pc #:  4/

ROCK = APHYRIC BASALT
       HEAVILY ALTERED,SOURCE IS IR;
       Texture: APHYRIC,INTERGRANULAR-INTERSERTAL*

Groundmass - GROUNDMASS                (   95%)
             Size(mm):        <.3

             PYROXENE
             AUGITE AND CA-POOR AUGITE,PARTLY ALTERED TO
             MONTMORILLONITE;

             PLAGIOCLASE
             PARTLY ALTERED TO MONTMORILLONITE;

             GLASS
             FORMER INTERSERTAL GLASS ENTIRELY ALTERED TO
             MONTMORILLONITE,NO NEPHELINE OR K-FELDSPAR*

Alteration - CALCITE                   (    0%)

             MONTMORILLONITE
             Location: VESICLES,VEIN  Replacing: GLASS+PYX+PLAG
             VEIN OF MONTMORILLONITE CUTS SECTION*

Vesicles   -
             Size(mm):   .2-1.5
             Percent:     5
             Filling: MONT
             AVERAGE SIZE 1MM,GREEN MONT*




Leg : 33    Top/Bottom Interval(mm): 1030/1050  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   924.50   Rock Type: IGNEOUS
Core:  33   Sample Midpoint(m)     :   930.04   Sect/Pc #:  4/

ROCK = APHYRIC BASALT
       SAME AS 33-4-100-102 EXCEPT IN REFLECTED LIGHT
       MAGNETITE IS SCATTERED EVENLY THROUGH THE ROCK,
       PARTIALLY ALTERED TO OPAQUE,NONREFLECTIVE MATERIAL
       SPARSE ILMENITE BLADES OCCUR IN AREAS OF FORMER
       INTERSERTAL GLASS,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):    0/   0  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   924.50   Rock Type: IGNEOUS
Core:  33   Sample Midpoint(m)     :   930.60   Sect/Pc #: CC/

ROCK = APHYRIC BASALT
       MODERATELY ALTERED,SOURCE IS IR;
       Texture: APHYRIC,INTERGRANULAR-INTERSERTAL*

Groundmass - GROUNDMASS                (   95%)
             Size(mm):        <.3

Alteration - CALCITE
             Location: VESICLES+
             Location: PATCHES

Vesicles   -
             Size(mm):   .6-1.8
             Percent:     5
             Filling: CALCITE
             AVERAGE SIZE 1MM,SAME AS 33-4-100-102 EXCEPT
             CALCITE OCCURS AS VESICLE FILLINGS AND REPLACEMENT
             PATCHES*




Leg : 33    Top/Bottom Interval(mm):    0/   0  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   924.50   Rock Type: IGNEOUS
Core:  33   Sample Midpoint(m)     :   930.60   Sect/Pc #: CC/

ROCK = APHYRIC BASALT
       SOURCE IS SHIPBOARD DESCRIPTION*
       Texture: APHYRIC, INTERSERTAL,LOCALLY INTERGRANULAR
       CUT PERPENDICULAR TO CORE SHOWS CHILL EFFECTS
       TOWARD BASE,AT COARSE SIDE GROUNDMASS
       AVERAGES 0.25*

Groundmass - PLAGIOCLASE               (   40%)
             Morphology: LATHS
             RANGE .01X.03 TO .4X1.0,AVG .03X.08,FIBROUS PLAG
             ALTERED TO PALAG TYPE MATERIAL-THIS MATERIAL ALSO
             ALSO FILLS CENTERS AT MANY "HOLLOW" PLAG LATHS;

             AUGITE                    (   34%)
             Size(mm):    0.4X0.5  Morphology: GRAINS
             INTERGROWN AT EDGES WITH PLAG,INTERSERTAL GLASS IN
             TRIANGULAR AREAS,AT FINE END OF SECTION AUGITE IS
             35%;

             OPAQUE MINERALS           (   <5%)
             CONCENTRATED NEAR GLASS*

Alteration - ZEOLITE
             Location: VESICLES

             CALCITE
             Location: VESICLES,VEIN  Replacing: S
             CALCITE VEINS IN HAND SPECIMEN ONLY;

             PALAGONITE
             Replacing: PLAG

Vesicles   -
             Size(mm): 0.6-1.75
             Filling: CALCITE,ZEOL
             Shape: FLATTENED
             VESICULAR,IRREGULAR & VUGGY NEAR TOP OF ROCK,MORE
             SPHERICAL TOWARD BASE,FLATTENED PERP. TO CORE,
             AVG SIZE TOP 1.3MM, BASE 0.5MM,PARTIALLY FILLED
             WITH DARK GREEN PARTIALLY FIBROUS-PARTLY GRANULAR
             MATERIAL, SMALL AMOUNT CALCITE & ZEOLITE FILLING,
             CALCITE LOOKS YOUNGER, VESICLES 11% AT COARSE
             END,VESICLES 5% AT FINE END,ABOUT HALF

             Size(mm): FILLED*




Leg : 33    Top/Bottom Interval(mm):  340/ 360  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   934.00   Rock Type: IGNEOUS
Core:  34   Sample Midpoint(m)     :   934.35   Sect/Pc #:  1/

ROCK = APHYRIC BASALT
       MODERATELY ALTERED,SOURCE IS IR;
       Texture: APHYRIC,INTERGRANULAR-INTERSERTAL*

Groundmass - GROUNDMASS                ( 88.5%)
             Size(mm):        <.3

             PYROXENE
             AUGITE AND CA-POOR AUGITE,FRESH;

             PLAGIOCLASE
             FRESH;

             GLASS
             FORMER INTERSERTAL GLASS ALTERED TO BROWN
             MONTMORILLONITE,NO NEPHELINE OR K-FELDSPAR*

Alteration - MONTMORILLONITE
             Location: VESICLES       Replacing: GLASS

             CALCITE
             Location: VESICLES

Vesicles   -
             Size(mm):   .5-1.5
             Percent:    11
             Filling: MONT+CALCITE
             AVERAGE SIZE 1MM,PARTIALLY FILLED WITH GREEN
             MONTMORILLONITE,SOME VESICLE CENTERS CONTAIN
             CALCITE*




Leg : 33    Top/Bottom Interval(mm):  400/ 410  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   934.00   Rock Type: IGNEOUS
Core:  34   Sample Midpoint(m)     :   934.41   Sect/Pc #:  1/

ROCK = APHYRIC BASALT
       SAME AS 34-1-34-36 PLUS IN REFLECTED LIGHT
       IDENTICAL TO 33-4-103-105 EXCEPT THAT A FEW
       SCATTERED CHALCOPYRITE BLEBS WERE OBSERVED,SOME
       INTERGROWN WITH PYRRHOTITE,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):  840/ 860  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   934.00   Rock Type: IGNEOUS
Core:  34   Sample Midpoint(m)     :   936.35   Sect/Pc #:  2/

ROCK = PLAG-PYX SPARSELY GLOMEROPHYRIC BASALT
       MODERATELY ALTERED,SOURCE IS IR;
       Texture: SPARSELY GLOMEROPHYRIC,INTERSERTAL-DIABASIC*

Phenocrysts- COMBINATION               (    2%)
             Size(mm):        1.5
             GLOMEROPHYRIC CLOTS OF PLAG+PYX,CLOTS FRESH*

Groundmass - PYROXENE
             AUGITE AND CA-POOR AUGITE,FRESH;

             PLAGIOCLASE
             FRESH;

             GLASS
             FORMER INTERSERTAL GLASS ALTERED TO BROWN
             MONTMORILLONITE,NO NEPHELINE OR K-FELDSPAR
             OBSERVED*

Alteration - CALCITE                   (    0%)

             MONTMORILLONITE
             Location: VESICLES       Replacing: GLASS

Vesicles   -
             Size(mm):     .5-7
             Percent:    19
             Filling: MONT
             AVERAGE SIZE 2.5MM,VESICLES RANGE TO VERY LARGE
             SIZES,SMALLER FILLED WITH GREEN MONTMORILLONITE,
             LARGER HAVE ONLY THIN RIMS,PALE GREEN CELADONITE
             COATS SOME LARGER WALLS*




Leg : 33    Top/Bottom Interval(mm):  910/ 930  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   934.00   Rock Type: IGNEOUS
Core:  34   Sample Midpoint(m)     :   936.42   Sect/Pc #:  2/

ROCK = PLAG-PYX SPARSELY GLOMEROPHYRIC BASALT
       SAME AS 34-2-84-86,IN REFLECTED LIGHT MAGNETITE IS
       SCATTERED EVENLY THROUGHOUT THE ROCK,PARTIALLY
       REPLACED BY AN OPAQUE,NONREFLECTIVE MATERIAL,
       SPARSE ILMENITE OCCURS AS BLOCKY GRAINS AND LATHS,
       SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm): 1150/1170  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   934.00   Rock Type: IGNEOUS
Core:  34   Sample Midpoint(m)     :   936.66   Sect/Pc #:  2/

ROCK = APHYRIC BASALT
       MODERATELY ALTERED,SOURCE IS IR,FRESH GROUNDMASS;
       Texture: APHYRIC,VITROPHYRIC*

Groundmass - GROUNDMASS                ( 73.5%)
             Size(mm):       <.05

             PYROXENE
             Morphology: MICROLITES
             AUGITE AND CA-POOR AUGITE,FRESH;

             PLAGIOCLASE

             GLASS
             FORMER GROUNDMASS GLASS(APPROX 50% OF NON-
             VESICULAR PART OF ROCK)IS COMPLETELY ALTERED TO
             BROWN MONTMORILLONITE,NO K-FELDSPAR*

Alteration - CALCITE
             SMALL AMOUNTS OBSERVED;

             OTHER
             SOME GREENISH CELADONITE REPLACING GROUNDMASS*

Vesicles   -
             Size(mm):    .5-10
             Percent:  26.5
             AVERAGE SIZE 5MM,HUGE VESICLES ARE LARGELY OPEN
             WITH THIN RIMS OF GREEN MONTMORILLONITE,HEULANDITE
             IDENTIFIED IN VESICLE FILLINGS BY X-RAY DIFFRACT.*




Leg : 33    Top/Bottom Interval(mm): 1180/1200  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   934.00   Rock Type: IGNEOUS
Core:  34   Sample Midpoint(m)     :   938.19   Sect/Pc #:  3/

ROCK = APHYRIC BASALT
       SAME AS 34-3-115-117 EXCEPT IN REFLECTED LIGHT
       TINY XTLS OF MAGNETITE ARE SCATTERED EVENLY
       THROUGH ROCK,PARTIALLY ALTERED TO AN OPAQUE
       NONREFLECTIVE SUBSTANCE,A FEW ILMENITE LATHS AND
       MINUTE CHALCOPYRITE BLEBS ARE PRESENT,NO NEPHELINE
       PRESENT,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):  620/ 640  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   934.00   Rock Type: IGNEOUS
Core:  34   Sample Midpoint(m)     :   939.13   Sect/Pc #:  4/

ROCK = PYX-PLAG MODERATELY GLOMEROPHYRIC BASALT
       SOURCE IS IR;
       Texture: MODERATELY GLOMEROPHYRIC,VITROPHYRIC*

Phenocrysts- COMBINATION               (    8%)
             Size(mm):        1.6
             GLOMEROPHYRIC CLOTS OF PYX+PLAG*

Groundmass - GROUNDMASS                ( 73.5%)
             Size(mm):       <.05
             SAME AS 34-3-115-117 EXCEPT FOR PRESENCE OF
             UNALTERED CLOTS AND THE PRESENCE OF SOMEWHAT MORE
             CALCITE*

Vesicles   -
             Size(mm):      2-8
             Percent:  18.5
             AVERAGE SIZE 5MM*




Leg : 33    Top/Bottom Interval(mm):  650/ 670  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   934.00   Rock Type: IGNEOUS
Core:  34   Sample Midpoint(m)     :   939.16   Sect/Pc #:  4/

ROCK = PYX-PLAG MODERATELY GLOMEROPHYRIC BASALT
       SAME AS 34-4-62-64 AND IN REFLECTED LIGHT SAME AS
       34-3-118-120,SOURCE IS IR*




Leg : 33    Top/Bottom Interval(mm):    0/   0  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   934.00   Rock Type: IGNEOUS
Core:  34   Sample Midpoint(m)     :   940.10   Sect/Pc #: CC/

ROCK = PYX-PLAG GLOMEROPHYRIC BASALT
       SOURCE IS IR;
       Texture: GLOMEROPHYRIC,VITROPHYRIC*

Groundmass - GROUNDMASS                (   76%)
             Size(mm):       <.05

Vesicles   -
             Size(mm):     2-10
             Percent:     7
             AVERAGE SIZE 5MM,SAME AS 34-4-62-64 EXCEPT
             CONTAINS MORE CLOTS AND LESS VESICLES*




Leg : 33    Top/Bottom Interval(mm):    0/   0  Describer: Jackson, E.D.
Hole: 317A  Top of Core Depth(m)   :   934.00   Rock Type: IGNEOUS
Core:  34   Sample Midpoint(m)     :   940.10   Sect/Pc #: CC/

ROCK = PLAG-CPX GLOMEROPHYRIC BASALT
       SOURCE IS SHIPBOARD DESCRIPTION,ROCK SAMPLE SHOWS
       1-2% YELLOW ALTERED WELL SHAPED .5MM AREAS WHICH
       MAY BE FORMER OL MICROPHENOS,NONE IN SECTION,
       ALSO SHOWS PURE ZEOL VESICLE FILLINGS-AGAIN NOT
       OBSERVED IN SECTION;
       Texture: MICROPHYRIC, GLOMEROPHYRIC,VERY FINE
       INTERGRANULAR GROUNDMASS*

Phenocrysts- PLAGIOCLASE               (  7.5%)
             Size(mm):    0.2X0.5  Morphology: SERIATE
             SIZE RANGES TO 0.6X1.2MM,AVG SIZE ABOUT 0.4X0.8MM,
             SOME SERIATE,BUT NOT EVENLY DISPERSED IN SIZE, MAY
             BE SEVERAL GENERATIONS;

             PLAGIOCLASE               (    6%)
             PLAG-RICH GLOMERPHYRIC CLOTS,5-10 GRAINS PRESENT,
             RANGE FROM .25X.4 TO 1.8X1.8MM, AVG 1.2X1.2MM,
             INDIVIDUAL PLAG ARE 0.1X0.5 ON THE AVERAGE, ABOUT
             5% PYX IS INTERGROWN;

             CLINOPYROXENE             (  3.5%)
             PYX-RICH GLOMERPHYRIC CLOTS,5-10 GRAINS PRESENT,
             RANGE IN SIZE FROM .25X.4 TO .8X1.25MM,AVG .5X.7,
             INDIVIDUAL CPX AVG 0.2-0.3MM, ARE INTERGROWN
             WITH ABOUT 5% PLAG*

Groundmass - PLAGIOCLASE               (   35%)
             Size(mm):       <.05

             CLINOPYROXENE             (   35%)
             Size(mm):       <.05

             PIGEONITE                 (    0%)

             GLASS                     (    3%)
             ONLY PARTLY ALTERED, SOME STILL BROWN;

             OPAQUE MINERALS           (   <5%)

Alteration - CALCITE                   (    0%)

             ZEOLITE
             Location: VESICLES

Vesicles   -
             Percent:     7
             Filling: ZEOL,OTHER
             Shape: IRREGULAR,

             Shape: VUGGY,

             Shape: ROUNDED
             GENERALLY ELONGATE PERPENDICULAR TO CORE,FILLED
             WITH FIBROUS TO GRANULAR BLUE-GREEN MATERIAL,MOST
             HAVE BROWN .05MM RIMS,A FEW CONTAIN SMALL AMOUNTS
             OF ZEOL,ROCK IS VESICULAR*




    

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.

Please see NOAA's privacy and disclaimer information. Send questions or comments to mgg.info@noaa.gov.

Department of Commerce > NOAA > NESDIS > NCEI > doi:10.7289/V54M92G2