Leg : 59 Top/Bottom Interval(mm): 170/ 200 Describer: Zakariakze, G.
Hole: 451 Top of Core Depth(m) : 318.50 Rock Type: SEDIMENTARY
Core: 35 Sample Midpoint(m) : 319.42 Sect/Pc #: CC/
ROCK = PLAG-OL-CPX PHYRIC BASALT
CLAST IN VOLCANICLASTIC CONGLOMERATE;
Texture: PORPHYRITIC,HYALOPILITIC;
Where sampled: CLAST IN BRECCIA*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 2
PSEUDOMORPHS ONLY;
PLAGIOCLASE ( 35%)
Size(mm): 2-3 Morphology: EUHEDRAL,PRISMATIC
APPROX COMP AN60,GLOMEROMORPHS;
CLINOPYROXENE ( 2%)
Size(mm): 2 Morphology: SUBHEDRAL
SLIGHTLY RESORBED,GLOMEROMORPHS WITH OL
OPAQUE MINERALS ( <1%)
Size(mm): 0.4 Morphology: ANHEDRAL
IN OL PHENOS OR IN GROUNDMASS,INCLUDES MAGN OR
ILMENITE*
Groundmass - OLIVINE ( 5%)
Size(mm): <0.1
PLAGIOCLASE ( 15%)
Size(mm): <0.2
CLINOPYROXENE ( 10%)
Size(mm): <0.1
OPAQUE MINERALS ( 2%)
Size(mm): <0.1
INCLUDES MAGN + ILMENITE;
GLASS ( 20%)
ALTERED--LOCALLY RELATIVELY FRESH*
Alteration - SMECTITE
Location: GROUNDMASS Replacing: GLASS,OL
Vesicles -
Size(mm): 2-3
Percent: 5
Location: GROUNDMASS
Filling: MAINLY EMPTY
Shape: OVAL-
Shape: IRREGULAR
Leg : 59 Top/Bottom Interval(mm): 1370/1400 Describer: Ishi, T.
Hole: 451 Top of Core Depth(m) : 347.00 Rock Type: SEDIMENTARY
Core: 38 Sample Midpoint(m) : 348.39 Sect/Pc #: 1/
ROCK = PLAG-OL-CPX-OPX PHYRIC BASALTIC ANDESITE
CLAST IN VOLCANICLASTIC CONGLOMERATE,ROCK MAY
BE ANDESITE;
Texture: PORPHYRITIC,HYALOPILITIC;
Where sampled: CLAST IN LAPILLI TUFF AND BRECCIA*
Phenocrysts- OLIVINE ( 4%)
Size(mm): 0.4-0.8
OPX? OR OL? PSEUDOMORPHS;
PLAGIOCLASE ( 35%)
Size(mm): 0.4-5.0 Morphology: EUHEDRAL-ANHEDRAL
APPROX COMP AN48;
CLINOPYROXENE ( 3%)
Size(mm): 0.4-2.0 Morphology: SUBHEDRAL-ANHEDRAL
OPAQUE MINERALS ( 1%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL
INCLUDES MAGN OR ILMENITE,IN OL PYX OR GLASS;
ORTHOPYROXENE ( 1%)
Size(mm): 0.4
Groundmass - OLIVINE ( TR%)
PLAGIOCLASE ( 7%)
Size(mm): 0.01-0.1 Morphology: PRISMATIC
APPROX COMP AN42;
CLINOPYROXENE ( 10%)
Size(mm): 0.01-0.1 Morphology: PRISMATIC
OPAQUE MINERALS ( 5%)
Size(mm): 0.01-0.05 Morphology: EQUIDIMENSIONAL-SUBHEDRAL
INCLUDES MAGN + ILMENITE;
GLASS ( 30%)
BROWN*
Alteration - CLAY MINERALS ( 4%)
Replacing: GLASS RIMS,OL
Leg : 59 Top/Bottom Interval(mm): 270/ 300 Describer: Ishi, T.
Hole: 451 Top of Core Depth(m) : 347.00 Rock Type: SEDIMENTARY
Core: 38 Sample Midpoint(m) : 348.79 Sect/Pc #: 2/
ROCK = PLAG-CPX-OL-OPX PHYRIC BASALTIC ANDESITE
CLAST IN VOLCANICLASTIC CONGLOMERATE,ROCK MAY BE
ANDESITE;
Texture: PORPHYRITIC,HYALOPILITIC;
Where sampled: CLAST IN LAPILLI TUFF AND BRECCIA*
Phenocrysts- OLIVINE ( >4%)
Size(mm): 0.5 Morphology: SUBHEDRAL
PERCENTAGE UNCERTAIN,PSEUDOMORPHS;
PLAGIOCLASE ( 40%)
Size(mm): 0.4-4 Morphology: EUHEDRAL-SUBHEDRAL
APPROX COMP AN58;
CLINOPYROXENE ( 6%)
Size(mm): 0.4-2 Morphology: SUBHEDRAL
2VZ 60;
ORTHOPYROXENE ( <1%)
Size(mm): 0.8 Morphology: ANHEDRAL
OPAQUE MINERALS ( 2%)
Size(mm): 0.3-0.6 Morphology: SUBHEDRAL
INCLUDES ILMENITE + MAGN,IN GROUNDMASS+PLAG+PYX*
Groundmass - PLAGIOCLASE ( 15%)
Size(mm): 0.01-0.3 Morphology: LATHS
APPROX COMP AN53;
CLINOPYROXENE ( 5%)
Size(mm): 0.02-0.05 Morphology: SUBHEDRAL
OPAQUE MINERALS ( 10%)
Size(mm): 0.01-0.02 Morphology: EUHEDRAL-SUBHEDRAL
INCLUDES MAGN + ILMENITE;
GLASS ( 17%)
Alteration - CLAY MINERALS ( 15%)
Replacing: OL,GLASS
Vesicles -
Size(mm): 0.6-7.0
Percent: 5
Filling: EMPTY
Leg : 59 Top/Bottom Interval(mm): 820/ 870 Describer: Ishi, T.
Hole: 451 Top of Core Depth(m) : 413.50 Rock Type: SEDIMENTARY
Core: 45 Sample Midpoint(m) : 414.35 Sect/Pc #: 1/
ROCK = PLAG-CPX PHYRIC BASALT
CLAST IN VOLCANICLASTIC CONGLOMERATE;
Texture: PORPHYRITIC,HYALOPILITIC;
Where sampled: CLAST IN LAPILLI TUFF AND BRECCIA*
Phenocrysts- OLIVINE
Size(mm): 0.5-1.0 Morphology: SUBHEDRAL
PSEUDOMORPHS;
PLAGIOCLASE ( 40%)
Size(mm): 0.4-5 Morphology: EUHEDRAL-SUBHEDRAL
APPROX COMP AN58;
CLINOPYROXENE ( 2%)
Size(mm): 0.5-1.0 Morphology: SUBHEDRAL
MAGNETITE ( 1%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL
IN OL? PYX AND GROUNDMASS*
Groundmass - PLAGIOCLASE ( 10%)
Size(mm): 0.02-0.2 Morphology: PRISMATIC
APPROX COMP AN54;
CLINOPYROXENE ( 8%)
Size(mm): 0.02-0.2 Morphology: SUBHEDRAL
OPAQUE MINERALS ( 5%)
Size(mm): 0.01-0.05 Morphology: EUHEDRAL-SUBHEDRAL
INCLUDES MAGN + ILMENITE;
GLASS ( 15%)
Alteration - CARBONATE ( <1%)
CLAY MINERALS ( 15%)
Replacing: GLASS,OL
Vesicles -
Size(mm): 0.4-2.0
Percent: 3
Filling: EMPTY
Shape: SPHERICAL
Leg : 59 Top/Bottom Interval(mm): 240/ 290 Describer: Ishi, T.
Hole: 451 Top of Core Depth(m) : 416.50 Rock Type: UNIDENTIFIED
Core: 46 Sample Midpoint(m) : 416.77 Sect/Pc #: 1/
ROCK = PLAG-CPX-OPX PHYRIC ANDESITE
CLAST IN VOLCANICLASTIC BRECCIA;
Texture: PORPHYRITIC,HYALOPILITIC;
Where sampled: CLAST IN LAPILLI TUFF AND BRECCIA*
Phenocrysts- PLAGIOCLASE ( 30%)
Size(mm): 0.5-6.0 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( 2%)
Size(mm): 0.5-1.5 Morphology: SUBHEDRAL
AUGITE 2V 60;
ORTHOPYROXENE ( TR%)
Size(mm): 0.7 Morphology: SUBHEDRAL
MAGNETITE ( 1%)
Size(mm): 0.2-0.7 Morphology: SUBHEDRAL
IN OPX CPX AND GROUNDMASS*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): 0.02-0.4 Morphology: PRISMATIC
APPROX COMP AN34
CLINOPYROXENE ( 5%)
Size(mm): 0.02-0.3 Morphology: SUBHEDRAL
OPAQUE MINERALS ( 5%)
Size(mm): 0.01-0.05 Morphology: SUBHEDRAL
INCLUDES MAGN + ILMENITE;
GLASS ( 14%)
BROWN,ALTERED;
ORTHOPYROXENE ( <1%)
Size(mm): 0.3 Morphology: SUBHEDRAL,PRISMATIC
Alteration - CLAY MINERALS ( 15%)
Location: VEIN,VESICLES Replacing: OPX,CPX,GLASS
Vesicles -
Size(mm): 0.4-1.5
Percent: 7
Filling: CLAY.MINS
Shape: IRREGULAR
CLAY.MINS AT EDGE*
Leg : 59 Top/Bottom Interval(mm): 90/ 130 Describer: Zakariakze, G.
Hole: 451 Top of Core Depth(m) : 473.50 Rock Type: SEDIMENTARY
Core: 53 Sample Midpoint(m) : 475.11 Sect/Pc #: 2/
ROCK = PLAG-CPX PHYRIC BASALTIC ANDESITE
CLAST IN VOLCANICLASTIC CONGLOMERATE,ROCK MAY BE
BASALTIC ANDESITE;
Texture: PORPHYRITIC,HYALOPILITIC;
Where sampled: CLAST FROM BRECCIA*
Phenocrysts- PLAGIOCLASE ( 40%)
Size(mm): 2 Morphology: PRISMATIC
APPROX COMP AN62,SHORT AND ELONGATE PRISMATIC
XTLS,SLIGHTLY RESORBED;
CLINOPYROXENE ( 5%)
Size(mm): 2-4.0 Morphology: SUBHEDRAL,ANHEDRAL
SUBHEDRAL AND ANHEDRAL RESORBED XTLS,RARE
GLOMEROMORPHS WITH PLAG;
OPAQUE MINERALS ( 1%)
Size(mm): 0.5 Morphology: IRREGULAR
POSSIBLY MAGN?,IRREGULAR RESORBED GRAINS*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): 0.05-0.1 Morphology: LATHS
CLINOPYROXENE ( 2-3%)
Size(mm): 0.02-0.05 Morphology: IRREGULAR,ANHEDRAL
OPAQUE MINERALS ( 1%)
Size(mm): 0.01 Morphology: ANHEDRAL GRAINS
INCLUDES MAGN + ILMENITE;
GLASS ( 25%)
ALMOST COMPLETELY ALTERED AND REPLACED WITH SMEC*
Alteration - CARBONATE ( 1%)
Location: VESICLES Replacing: CPX
SMECTITE
Location: VESICLES Replacing: GLASS
Vesicles -
Size(mm): 0.2-0.4
Percent: 5
Filling: CARB,CLAY.MINS
CLAY.MINS ARE SMEC?*
Leg : 59 Top/Bottom Interval(mm): 200/ 270 Describer: Zakariakze, G.
Hole: 451 Top of Core Depth(m) : 480.00 Rock Type: SEDIMENTARY
Core: 54 Sample Midpoint(m) : 480.24 Sect/Pc #: 1/
ROCK = PLAG-OL-CPX PHYRIC BASALTIC ANDESITE
CLAST IN VOLCANICLASTIC CONGLOMERATE,ROCK MAY BE
BASALTIC ANDESITE;
Texture: PORPHYRITIC,HYALOPILITIC;
Where sampled: CLAST FROM BRECCIA*
Phenocrysts- OLIVINE ( 4%)
Size(mm): 1-1.5
COMPLETELY PSEUDOMORPHED;
PLAGIOCLASE ( 40%)
Size(mm): 0.1-3 Morphology: EUHEDRAL,PRISMATIC
SHORT EUHEDRAL PRISMS,APPROX COMP AN58;
CLINOPYROXENE ( 1%)
Size(mm): 2 Morphology: IRREGULAR
XTLS RESORBED;
ORTHOPYROXENE
IDENTITY UNCERTAIN--SOME PSEUDOMORPHS MIGHT BE
OPX*
Groundmass - PLAGIOCLASE ( 10%)
CLINOPYROXENE
PERCENTAGE NOT KNOWN;
OPAQUE MINERALS ( 1-2%)
INCLUDES MAGN + ILMENITE;
GLASS ( 30%)
Size(mm): 0.03-0.04 Morphology: ELONGATE MICROLITES
ORTHOPYROXENE
PERCENTAGE NOT KNOWN*
Alteration - CARBONATE ( 5%)
Location: VEINS, Replacing: OL
Location: AMYGDULES
PSEUDOMORPHS OL;
CLAY MINERALS ( 5-11%)
Location: GLASSY MATRIX Replacing: GLASSY MATRIX
ZEOLITE ( 1%)
Location: VEINS
QUARTZ ( 2%)
Location: VEINS
Vesicles -
Size(mm): 2
Percent: 3-4
Filling: CARB
Shape: ELONGATE
Leg : 59 Top/Bottom Interval(mm): 760/ 790 Describer: Ishi, T.
Hole: 451 Top of Core Depth(m) : 480.00 Rock Type: UNIDENTIFIED
Core: 54 Sample Midpoint(m) : 482.28 Sect/Pc #: 2/
ROCK = PLAG-CPX PHYRIC BASALT
CLAST IN VOLCANICLASTIC BRECCIA;
Texture: PORPHYRITIC,VITROPHYRIC;
Where sampled: CLAST IN BRECCIA*
Phenocrysts- PLAGIOCLASE ( 15%)
Size(mm): 0.4-2.0
APPROX COMP AN62,ALTERED;
CLINOPYROXENE ( 20%)
Size(mm): 0.4-2.0 Morphology: EUHEDRAL-SUBHEDRAL
AUGITE 2V + 60*
Groundmass - GLASS ( 65%)
VESICULAR,ALTERED*
Alteration - CARBONATE
Replacing: PLAG,OL
CLAY MINERALS
Replacing: GLASS
Leg : 59 Top/Bottom Interval(mm): 660/ 670 Describer: Ishi, T.
Hole: 451 Top of Core Depth(m) : 489.50 Rock Type: SEDIMENTARY
Core: 55 Sample Midpoint(m) : 493.17 Sect/Pc #: 3/
ROCK = PLAG-CPX MODERATELY PHYRIC BASALTIC ANDESITE
CLAST IN VOLCANICLASTIC CONGLOMERATE;
Texture: MODERATELY PORPHYRITIC,VITROPHYRIC;
Where sampled: CLAST*
Phenocrysts- PLAGIOCLASE ( 5%)
CLINOPYROXENE ( <1%)
AUGITE 2V +60;
MAGNETITE ( 1%)
Morphology: ANHEDRAL
Groundmass - PLAGIOCLASE ( 5%)
Size(mm): 0.01-0.05 Morphology: SKELETAL
MICROLITES;
GLASS ( 90%)
ALTERED TO CLAY.MINS + ZEOLITE*
Alteration - CARBONATE
ZEOLITE
Replacing: GLASS
CLAY MINERALS
Replacing: GLASS
Leg : 59 Top/Bottom Interval(mm): 280/ 310 Describer: Zakariakze, G.
Hole: 451 Top of Core Depth(m) : 518.00 Rock Type: UNIDENTIFIED
Core: 58 Sample Midpoint(m) : 520.94 Sect/Pc #: CC/
ROCK = PLAG-CPX-OPX PHYRIC BASALTIC ANDESITE
CLASTS IN CC PROBABLY WASHED OUT FROM AN ORIGINAL
BRECCIA INTERVAL;
Texture: PORPHYRITIC,HYALOPILITIC
WITH PATCHES OF GLASS;
Where sampled: CLAST FROM BRECCIA*
Phenocrysts- OLIVINE ( 0%)
PLAGIOCLASE ( 25%)
Size(mm): 0.6-3.0 Morphology: SUBHEDRAL
APPROX COMP AN50?,COMPLEX ZONING,GLASS INCLUSIONS;
CLINOPYROXENE ( 5%)
Size(mm): 0.2-0.8
GLOMEROPHYRIC WITH PLAG;
SPINEL ( 0%)
ORTHOPYROXENE ( 5%)
Size(mm): 0.2-1 Morphology: EUHEDRAL
APPROX COMP EN70-80,INCLUSIONS OF MAGN;
MAGNETITE ( 5%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL,ROUNDED
Groundmass - PLAGIOCLASE ( 5%)
Morphology: SKELETAL
MICROLITES;
GLASS ( 30%)
DEVITRIFIED*
Alteration - CLAY MINERALS
Replacing: GLASS
ONLY PARTLY FILLED,SCATTERED*
Vesicles -
Size(mm): 0.5-1
Percent: 5
Filling: SMEC
Shape: IRREGULAR
Leg : 59 Top/Bottom Interval(mm): 550/ 570 Describer: Mattey, D.
Hole: 451 Top of Core Depth(m) : 527.50 Rock Type: SEDIMENTARY
Core: 59 Sample Midpoint(m) : 528.06 Sect/Pc #: 1/
ROCK = PLAG-OPX-CPX-OL PHYRIC BASALTIC ANDESITE
CLAST IN VOLCANICLASTIC CONGLOMERATE;
Texture: PORPHYRITIC,PILOTAXITIC-HYALOPILITIC;
Where sampled: CLAST IN VOLCANICLASTIC CONGLOMERATE*
Phenocrysts- OLIVINE ( TR%)
Size(mm): 0.2 Morphology: EUHEDRAL
PSEUDOMORPHS
PLAGIOCLASE ( 30%)
Size(mm): 0.5-4 Morphology: EUHEDRAL
APPROX COMP AN50-60?,ZONED,MANTLED,GLASS
INCLUSIONS;
CLINOPYROXENE ( 5%)
Size(mm): 0.2-0.8
COMPLEX TWINNING,GLOMEROPHYRIC;
ORTHOPYROXENE ( 7%)
Size(mm): 0.2-1 Morphology: EUHEDRAL
APPROX COMP EN80,INCLUSIONS OF MAGNETITE*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): 0.005-0.1 Morphology: MICROLITES
FLOW ALIGNED;
MAGNETITE ( 3%)
Size(mm): 0.1-0.3 Morphology: ROUNDED,SUBOCTOHEDRAL
GLASS ( 35%)
FRESH,DEVITRIFIED*
Alteration - CLAY MINERALS
Replacing: OL
Vesicles -
Percent: TR
Leg : 59 Top/Bottom Interval(mm): 140/ 190 Describer: Mattey, D.
Hole: 451 Top of Core Depth(m) : 537.00 Rock Type: SEDIMENTARY
Core: 60 Sample Midpoint(m) : 537.17 Sect/Pc #: 1/
ROCK = PLAG-CPX-OL PHYRIC BASALTIC ANDESITE
CLAST IN VOLCANICLASTIC CONGLOMERATE;
Texture: PORPHYRITIC,HYALOPILITIC;
Where sampled: CLAST IN VOLCANICLASTIC CONGLOMERATE*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.1-0.3
PSEUDOMORPHED BY CLAYS;
PLAGIOCLASE ( 40%)
Size(mm): 0.5-5 Morphology: SUBHEDRAL,EQUANT
COMPLEX TWINNING;
CLINOPYROXENE ( 10%)
Size(mm): 0.2-1 Morphology: ROUNDED
RESORBED?*
Groundmass - PLAGIOCLASE ( 7%)
Size(mm): 0.02-0.08 Morphology: SKELETAL MICROLITES
MAGNETITE ( 1%)
Size(mm): 0.1-0.3 Morphology: EUHEDRAL,SUBSKELETAL
GLASS ( 40%)
ALTERED TO CLAYS?*
Alteration - CLAY MINERALS
Replacing: OL,GLASS
Vesicles -
Percent: TR
Filling: SMEC
Shape: IRREGULAR
Leg : 59 Top/Bottom Interval(mm): 1430/1460 Describer: Mattey, D.
Hole: 451 Top of Core Depth(m) : 594.00 Rock Type: TUFF
Core: 66 Sample Midpoint(m) : 595.45 Sect/Pc #: 1/
ROCK = CRYSTALLINE VITRIC TUFF
SAMPLE FROM TUFF.VOLCANICLASTIC BRECCIA,30% OF
SAMPLE ARE FRAGMENTS (0.5-1 MM) OF HYALOPILITIC
BASALT;
Texture: PORPHYRITIC,FRAGMENTOSE;
Where sampled: CRYSTALLINE VITRIC TUFF*
Phenocrysts- OLIVINE ( TR%)
PLAGIOCLASE ( 30%)
Size(mm): 0.2-0.8
FRAGMENTS;
CLINOPYROXENE ( 10%)
Size(mm): 0.2-0.5
FRAGMENTS*
Groundmass - GLASS ( 30%)
DEVITRIFIED,ALTERED TO CLAYS*
Alteration - CLAY MINERALS
Replacing: GLASS
Leg : 59 Top/Bottom Interval(mm): 110/ 130 Describer: Mattey, D.
Hole: 451 Top of Core Depth(m) : 622.50 Rock Type: UNIDENTIFIED
Core: 69 Sample Midpoint(m) : 624.12 Sect/Pc #: 2/
ROCK = PLAG-CPX-OL PHYRIC BASALTIC ANDESITE
CLAST FROM VOLCANICLASTIC BRECCIA,SECTION INCLUDES
TUFF MATRIX;
Texture: PORPHYRITIC,HYALOPILITIC-PILOTAXITIC;
Where sampled: CLAST IN VOLCANICLASTIC BRECCIA + TUFF MATRIX*
Phenocrysts- OLIVINE ( TR%)
IDENTITY UNCERTAIN;
PLAGIOCLASE ( 30%)
Size(mm): 0.5-3 Morphology: SUBHEDRAL,ANHEDRAL
COMPLEX TWINNING + ZONING,GLASS OR MAGN
INCLUSIONS;
CLINOPYROXENE ( 10%)
Size(mm): 0.2-1 Morphology: EUHEDRAL-SUBHEDRAL
INCLUSIONS OF MAGN*
Groundmass - PLAGIOCLASE ( 10%)
Size(mm): 0.05-0.2 Morphology: SKELETAL MICROLITES
FLOW ALIGNED;
MAGNETITE ( 5%)
Size(mm): 0.1-0.4 Morphology: SUBHEDRAL
GLASS ( 45%)
EXTENSIVELY ALTERED TO CLAYS*
Alteration - CLAY MINERALS ( 20%)
Replacing: GLASS
QUARTZ
Location: VEINS
Vesicles -
Filling: CLAY.MIN
Shape: IRREGULAR
Leg : 59 Top/Bottom Interval(mm): 440/ 470 Describer: Mattey, D.
Hole: 451 Top of Core Depth(m) : 622.50 Rock Type: UNIDENTIFIED
Core: 69 Sample Midpoint(m) : 624.46 Sect/Pc #: 2/
ROCK = APHYRIC BASALT
CLAST IN VOLCANIC BRECCIA;
Texture: APHYRIC,HYALOPILITIC;
Where sampled: CLAST IN VOLCANIC BRECCIA*
Phenocrysts- PLAGIOCLASE ( TR%)
Size(mm): 0.2-0.3 Morphology: SUBHEDRAL
TWINNED;
AMPHIBOLE ( TR%)
Size(mm): 0.2-0.4
IDENTITY UNCERTAIN,SECONDARY PSEUDOMORPH AFTER
CPX?*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): 0.02-0.1 Morphology: SKELETAL
MICROLITES,FLOW ALIGNED;
GLASS ( 58%)
EXTENSIVELY ALTERED TO CHLOROPHAEITE (CLAY MINS)*
Alteration - CHLOROPHAEITE
Replacing: GLASS
Vesicles -
Size(mm): 0.1-0.3
Percent: 2
Filling: EMPTY OR
Shape: SPHERICAL
Filling: CLAY.MIN
Leg : 59 Top/Bottom Interval(mm): 100/ 130 Describer: Mattey, D.
Hole: 451 Top of Core Depth(m) : 670.00 Rock Type: UNIDENTIFIED
Core: 74 Sample Midpoint(m) : 670.12 Sect/Pc #: 1/
ROCK = PLAG-CPX-OPX PHYRIC BASALTIC ANDESITE
CLAST IN BASALTIC BRECCIA;
Texture: PORPHYRITIC,HYALOPILITIC*
Phenocrysts- PLAGIOCLASE ( 40%)
Size(mm): 0.5-3 Morphology: SUBHEDRAL
GLOMEROPHYRIC,GLASS INCLUSIONS,OSCILLATORY ZONING;
CLINOPYROXENE ( 7%)
Size(mm): 0.5-1 Morphology: ANHEDRAL-SUBHEDRAL
ORTHOPYROXENE ( 3%)
Size(mm): 0.3-0.7 Morphology: EUHEDRAL
PARTLY ALTERED TO CALCITE + CLAYS*
Groundmass - PLAGIOCLASE ( 8%)
Size(mm): 0.02 Morphology: SKELETAL MICROLITES
MAGNETITE ( 2%)
Size(mm): 0.1-0.2 Morphology: SUBHEDRAL,ROUNDED
GLASS ( 40%)
PARTLY ALTERED TO CLAYS*
Alteration - CALCITE
Replacing: OPX
CLAY MINERALS
Replacing: OPX,GLASS
Leg : 59 Top/Bottom Interval(mm): 630/ 670 Describer: Mattey, D.
Hole: 451 Top of Core Depth(m) : 784.00 Rock Type: SEDIMENTARY
Core: 87 Sample Midpoint(m) : 786.15 Sect/Pc #: 2/
ROCK = PLAG-CPX PHYRIC BASALTIC ANDESITE
CLAST IN VOLCANICLASTIC CONGLOMERATE;
Texture: PORPHYRITIC,HYALOPILITIC;
Where sampled: CLAST FROM VOLCANIC CONGLOMERATE*
Phenocrysts- PLAGIOCLASE ( 20%)
Size(mm): 0.3-2 Morphology: EUHEDRAL-SUBHEDRAL,EQUANT
GLOMEROPHYRIC*
Groundmass - PLAGIOCLASE ( 15%)
Size(mm): 0.1-0.3 Morphology: LATHS
ALSO 0.05 MM MICROLITES;
CLINOPYROXENE ( 3%)
Size(mm): 0.1-0.2 Morphology: SUBHEDRAL,GRANULAR
MAGNETITE ( 3%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL
GLASS ( 45%)
ALTERED TO BROWN CLAYS*
Alteration - CLAY MINERALS
Location: VESICLES Replacing: GLASS
SMEC IN VESICLES,BROWN CLAYS REPLACE GLASS*
Vesicles -
Size(mm): 0.2-0.8
Percent: 4
Filling: SMEC
Shape: IRREGULAR
Leg : 59 Top/Bottom Interval(mm): 170/ 210 Describer: Mattey, D.
Hole: 451 Top of Core Depth(m) : 822.00 Rock Type: SEDIMENTARY
Core: 91 Sample Midpoint(m) : 822.19 Sect/Pc #: 1/
ROCK = PLAG-CPX PHYRIC BASALTIC ANDESITE
CLAST IN VOLCANICLASTIC CONGLOMERATE;
Texture: PORPHYRITIC,VITROPHYRIC;
Where sampled: CLAST FROM VOLCANIC CONGLOMERATE*
Phenocrysts- PLAGIOCLASE ( 12%)
Size(mm): 0.4-1.0 Morphology: IRREGULAR-SUBHEDRAL
GLOMEROPHYRIC,ROUNDED;
CLINOPYROXENE ( 3%)
Size(mm): 0.3-0.8 Morphology: EUHEDRAL
EUHEDRAL OR GLOMEROPHYRIC*
Groundmass - MAGNETITE ( TR%)
Size(mm): 0.1 Morphology: ROUNDED GRAINS
GLASS ( 75%)
EXTREMELY ALTERED,REMNANT SPHERULITES COMPOSED OF
GREEN AND BROWN CLAYS*
Alteration - CLAY MINERALS
Location: VESICLES Replacing: GLASS
SMEC IN VESICLES,GREEN AND BROWN CLAYS REPLACE
GLASS*
Vesicles -
Size(mm): 0.2-0.5
Percent: 10
Filling: SMEC
Shape: SPHERICAL
Leg : 59 Top/Bottom Interval(mm): 170/ 200 Describer: Mattey, D.
Hole: 451 Top of Core Depth(m) : 822.00 Rock Type: UNIDENTIFIED
Core: 91 Sample Midpoint(m) : 823.97 Sect/Pc #: CC/
ROCK = PLAG-CPX PHYRIC BASALT
CLAST FROM VOLCANICLASTIC BRECCIA;
Texture: PORPHYRITIC,INTERSERTAL,GRANULAR;
Where sampled: CLAST FROM VOLCANICLASTIC CONGLOMERATE*
Phenocrysts- PLAGIOCLASE ( 35%)
Size(mm): 0.5-3 Morphology: SUBHEDRAL
COMPLEX TWINNING + ZONING,SOME GLOMEROPHYRIC*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): 0.1-0.2 Morphology: SUBHEDRAL-ANHEDRAL,EQUANT
Morphology: GRAINS
CLINOPYROXENE ( 15%)
Size(mm): 0.1-0.2 Morphology: GRANULAR
GLASS ( 25%)
ALTERED TO GREEN SMECTITE*
Alteration - SMECTITE
Location: VESICLES Replacing: GLASS
GLASS ALTERED TO GREEN SMEC*
Vesicles -
Size(mm): 0.2-1
Percent: 5
Filling: SMEC
Shape: SPHERICAL-
Shape: IRREGULAR
Leg : 59 Top/Bottom Interval(mm): 150/ 180 Describer: Mattey, D.
Hole: 451 Top of Core Depth(m) : 831.50 Rock Type: SEDIMENTARY
Core: 92 Sample Midpoint(m) : 831.67 Sect/Pc #: 1/
ROCK = PLAG-CPX-OPX PHYRIC BASALTIC ANDESITE
CLAST FROM VOLCANICLASTIC CONGLOMERATE
Texture: PORPHYRITIC,HYALOPILITIC;
Where sampled: CLAST FROM VOLCANICLASTIC CONGLOMERATE*
Phenocrysts- PLAGIOCLASE ( 35%)
Size(mm): 0.5-7 Morphology: SUBHEDRAL
APPROX COMP AN50-60?,GLOMEROCRYSTS;
CLINOPYROXENE ( 5%)
Size(mm): 0.2-0.8
GLOMEROCRYSTS;
ORTHOPYROXENE ( 3%)
Size(mm): 0.2-0.5
PARTLY PSEUDOMORPHED BY SMECTITES*
Groundmass - PLAGIOCLASE ( 5%)
Size(mm): 0.05-0.2 Morphology: SKELETAL MICROLITES-EUHEDRAL
Morphology: LATHS
CLINOPYROXENE ( 5%)
Size(mm): 0.1-0.2 Morphology: GRANULAR,ANHEDRAL
MAGNETITE ( <1%)
IN CPX;
GLASS ( 40%)
EXTENSIVELY ALTERED TO SMECTITE*
Alteration - CARBONATE
Replacing: OPX
IDENTITY UNCERTAIN
SMECTITE
Location: VESICLES Replacing: GLASS,OPX
Vesicles -
Size(mm): 0.3-0.8
Percent: 7
Filling: SMEC
Shape: IRREGULAR
Leg : 59 Top/Bottom Interval(mm): 190/ 210 Describer: Ishi, T.
Hole: 451 Top of Core Depth(m) : 926.50 Rock Type: SEDIMENTARY
Core: 102 Sample Midpoint(m) : 926.70 Sect/Pc #: CC/
ROCK = OL-CPX-PLAG MODERATELY MICROPHYRIC BASALT
CLAST IN VOLCANICLASTIC CONGLOMERATE;
Texture: APHYRIC,HYALOPILITIC;
Where sampled: CLAST IN VOLCANICLASTIC CONGLOMERATE*
Phenocrysts- OLIVINE ( 4%)
Size(mm): 0.4-0.5 Morphology: SUBHEDRAL
MICROPHENOS,PSEUDOMORPHS;
PLAGIOCLASE ( 2%)
Size(mm): 0.4-0.6 Morphology: EUHEDRAL
MICROPHENOS;
CLINOPYROXENE ( 3%)
Size(mm): 0.3-0.7 Morphology: SUBHEDRAL
MICROPHENOS*
Groundmass - OLIVINE ( 4%)
Size(mm): 0.02-0.04 Morphology: ANHEDRAL
PSEUDOMORPHS;
PLAGIOCLASE ( 15%)
Size(mm): 0.03-0.3 Morphology: LATHS
APPROX COMP AN63;
CLINOPYROXENE ( 3%)
Size(mm): 0.03-0.3 Morphology: SUBHEDRALS
OPAQUE MINERALS ( 10%)
Size(mm): 0.01-0.02 Morphology: MICROLITES
INCLUDES MAGN + ILMENITE;
GLASS ( 50%)
Alteration - CLAY MINERALS ( 25%)
Location: VESICLES Replacing: OL
Vesicles -
Size(mm): 0.5-3.0
Percent: 10
Filling: CLAY.MIN
Shape: ELONGATED
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