Leg : 60 Top/Bottom Interval(mm): 10/ 50 Describer: Sharaskin, A.
Hole: 454A Top of Core Depth(m) : 67.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 67.03 Sect/Pc #: 1/PCE 1
ROCK = APHYRIC BASALT;
Texture: MICROPHYRIC-SUBOPHITIC-INTERSERTAL;
Where sampled: FIRST PIECE UNDER SEDIMENTS
FLOW INTERIOR(?)*
Phenocrysts- OLIVINE ( .5%)
Size(mm): 0.15-0.4 Morphology: IRREGULAR,RARELY EUHEDRAL
PLAGIOCLASE ( .5%)
Size(mm): 1.0-1.6 Morphology: EUHEDRAL
WITH INCLUSIONS OF BROWN SPINEL GRAINS,COMP
UNCERTAIN*
Groundmass - CLINOPYROXENE ( 50%)
Size(mm): TO 0.4
APPROX COMP AUG.(?);
PLAGIOCLASE ( 20%)
Size(mm): TO 0.6
APPROX COMP AN65;
GLASS ( 10%)
DEVITRIFIED,ALTERED;
MAGNETITE ( 4%)
Size(mm): <0.1
OLIVINE
PROBABLY RARE GRAINS*
Alteration - PALAGONITE ( 3-5%)
Location: PATCHES AND Replacing: GLASS
Location: VEINS
Vesicles -
Size(mm): 0.15-1.6
Percent: 15
Location: THROUGHOUT
Filling: PALAG
Shape: ROUND TO
Shape: IRREGULAR
RARE PALAGONITE*
Leg : 60 Top/Bottom Interval(mm): 1330/1360 Describer: Sharaskin, A.
Hole: 454A Top of Core Depth(m) : 67.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 68.35 Sect/Pc #: 1/PCE 17B
ROCK = APHYRIC BASALT;
Texture: SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Groundmass - CLINOPYROXENE ( 65%)
Size(mm): TO 0.7
APPROX COMP AUG.;
PLAGIOCLASE ( 20%)
Size(mm): TO 1.5
APPROX COMP AN70;
GLASS ( 4%)
DEVITRIFIED;
MAGNETITE ( 1%)
Size(mm): <0.1
Alteration - COMBINATION ( 10%)
Location: PATCHES Replacing: GLASS
INCLUDES PALAG + CHLOR(?);
CARBONATE ( 3-5%)
Location: VESICLES
Vesicles -
Size(mm): 0.1-2
Percent: 10
Location: SCATTERED
Filling: CLAY,PALAG
Shape: IRREGULAR
Leg : 60 Top/Bottom Interval(mm): 410/ 430 Describer: Sharaskin, A.
Hole: 454A Top of Core Depth(m) : 67.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 68.92 Sect/Pc #: 2/PCE 3
ROCK = APHYRIC BASALT;
Texture: SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Groundmass - CLINOPYROXENE ( 60%)
Size(mm): <0.1-0.5
APPROX COMP AUG.;
PLAGIOCLASE ( 20%)
Size(mm): TO 0.8
APPROX COMP AN70-75;
MAGNETITE ( 5%)
Size(mm): <0.1
Alteration - PALAGONITE
Location: PATCHES Replacing: INTERSTITIAL PYX
Vesicles -
Size(mm): 0.1-1.5
Percent: 12
Location: SCATTERED
Leg : 60 Top/Bottom Interval(mm): 1020/1040 Describer: Sharaskin, A.
Hole: 454A Top of Core Depth(m) : 67.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 69.53 Sect/Pc #: 2/PCE 8
ROCK = APHYRIC BASALT;
Texture: SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Groundmass - CLINOPYROXENE ( 65%)
APPROX COMP AUG.;
PLAGIOCLASE ( 20%)
APPROX COMP AN70-75;
GLASS ( 5%)
DEVITRIFIED,ALTERED;
MAGNETITE ( 3%)
OLIVINE
ONLY ONE OLIVINE GRAIN WAS OBSERVED WITH SPINEL*
Alteration - CARBONATE
IRREGULAR ZONE OF ALTERATION;
CLAY MINERALS
IRREGULAR ZONE OF ALTERATION;
PALAGONITE
CHLORITE
ID UNCERTAIN*
Vesicles -
Size(mm): 0.1-2
Percent: 10
Location: SCATTERED
Filling: CARB,ARAGONITE
Shape: ROUNDED
Leg : 60 Top/Bottom Interval(mm): 740/ 760 Describer: Sharaskin, A.
Hole: 454A Top of Core Depth(m) : 67.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 70.75 Sect/Pc #: 3/PCE 3
ROCK = APHYRIC BASALT
OBSERVER'S ROCK NAME IS BASALT (DOLERITE);
Texture: SUBOPHITIC,INTERSERTAL;
Where sampled: FLOW INTERIOR*
Groundmass - CLINOPYROXENE ( 45%)
Size(mm): 0.1-2.0
APPROX COMP AUG.;
PLAGIOCLASE ( 35%)
Size(mm): 0.3-2.0
APPROX COMP AN70;
GLASS ( 7%)
DEVITRIFIED;
MAGNETITE ( 3%)
Size(mm): <0.1
Alteration - COMBINATION
Replacing: GLASS
INCLUDES PALAG + CHLORITE,REPLACES 25% OF GLASS*
Vesicles -
Size(mm): 0.4-7
Percent: 10
Location: SCATTERED
Shape: ROUNDED
Leg : 60 Top/Bottom Interval(mm): 120/ 140 Describer: Sharaskin, A.
Hole: 454A Top of Core Depth(m) : 67.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 71.63 Sect/Pc #: 4/PCE 2
ROCK = DOLERITE
APHYRIC TO SPARSELY PLAG PORPHYRITIC BASALT;
Texture: SUBOPHITIC,INTERSERTAL;
Where sampled: FLOW INTERIOR
MAYBE BOTTOM*
Groundmass - PLAGIOCLASE ( 60%)
Size(mm): 0.4-4.0 Morphology: LATH-SHAPED
APPROX COMP AN65,NORMAL ZONATION;
CLINOPYROXENE ( 15%)
Size(mm): 0.1-2.0
APPROX COMP AUG.
OLIVINE ( 10%)
Size(mm): 0.1-0.6 Morphology: ISOMETRIC GRAINS
APPROX COMP FO80-85,BROWN SPINEL INCLUSION;
GLASS ( 10%)
DEVITRIFIED,ALTERED;
MAGNETITE ( <0.1%)
Alteration - COMBINATION ( 10%)
Location: GLASS MATRIX Replacing: GLASS
INCLUDES PALAG + CHLORITE*
Vesicles -
Size(mm): 0.3-4
Percent: 3-5
Location: SCATTERED
Filling: INCRUSTATION
Shape: ROUND
Filling: PALAGONITE
Leg : 60 Top/Bottom Interval(mm): 620/ 640 Describer: Sharaskin, A.
Hole: 454A Top of Core Depth(m) : 67.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 72.13 Sect/Pc #: 4/PCE 5
ROCK = OLIVINE DOLERITE
APHYRIC TO SPARSELY PLAG PORPHYRITIC BASALT (ICD);
Texture: SUBOPHITIC,INTERSERTAL;
Where sampled: FLOW INTERIOR;
BOTTOM(?)*
Groundmass - PLAGIOCLASE ( 60%)
Size(mm): 0.4-4.0 Morphology: LATH-SHAPED
APPROX COMP AN70-75,NORMAL ZONATION;
OLIVINE ( 15%)
Size(mm): 0.1-0.6 Morphology: ISOMETRIC GRAINS
APPROX COMP FO80-85,BROWN SPINEL INCLUSION;
CLINOPYROXENE ( 15%)
Size(mm): 0.1-2.5
APPROX COMP AUG.;
GLASS ( 10%)
DEVITRIFIED,ALTERED;
MAGNETITE ( 3%)
Morphology: EUHEDRAL
Alteration - COMBINATION
Replacing: INTERSTITIAL GLASS
INCLUDES PALAG-CHLORITE AGGREGATES*
Vesicles -
Size(mm): 0.2-1.5
Percent: 2
Location: SCATTERED
Filling: CHLORITE-PALAG
Shape: ROUND
Filling: INCRUSTATIONS
Leg : 60 Top/Bottom Interval(mm): 1020/1060 Describer: Sharaskin, A.
Hole: 454A Top of Core Depth(m) : 76.50 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 79.04 Sect/Pc #: 2/PCE 2
ROCK = APHYRIC BASALT;
Texture: APHYRIC,INTERSERTAL(TRANSIT TO VARIOLITIC);
Where sampled: PIECE UNDER DRILLING BRECCIA*
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): TO 10 Morphology: AGGREGATES
APPROX COMP AN60(?);
CLINOPYROXENE ( 25%)
Morphology: AGGREGATES
APPROX COMP AUG.;
MAGNETITE ( 5%)
Size(mm): <0.1
GLASS ( 5%)
Vesicles -
Size(mm): 0.1-1.5
Percent: 15
Location: THROUGHOUT
Shape: ROUND TO
Shape: IRREGULAR
Leg : 60 Top/Bottom Interval(mm): 10/ 30 Describer: Sharaskin, A.
Hole: 454A Top of Core Depth(m) : 95.50 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 95.52 Sect/Pc #: 1/PCE 1
ROCK = APHYRIC BASALT;
Texture: MICROPORPHYRITIC,VARIOLITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 0.2-0.4 Morphology: EUHEDRAL
PLAGIOCLASE ( TR%)
IDENTITY UNCERTAIN,ONE HOLE WITH SHAPE OF PLAG
PRESENT IN THIN SECTION*
Groundmass - GLASS ( 92%)
DEVITRIFIED,CONTAINS VARIOLITIC STRUCTURES*
Vesicles -
Size(mm): 0.1-0.5
Percent: 3
Location: SCATTERED
Shape: ROUND TO
Shape: IRREGULAR
Leg : 60 Top/Bottom Interval(mm): 50/ 70 Describer: Sharaskin, A.
Hole: 454A Top of Core Depth(m) : 104.00 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 104.06 Sect/Pc #: 1/PCE 2
ROCK = APHYRIC BASALT;
Texture: MICROPORPHYRITIC,VARIOLITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 0.1-0.4 Morphology: EUHEDRAL
BROWN SPINEL INCLUSIONS;
Groundmass - GLASS ( 92%)
DEVITRIFIED*
Vesicles -
Size(mm): 0.3-4
Percent: 3
Location: SCATTERED
Filling: CLAY
Shape: ROUND-OVAL
Leg : 60 Top/Bottom Interval(mm): 810/ 840 Describer: Sharaskin, A.
Hole: 454A Top of Core Depth(m) : 113.00 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 113.83 Sect/Pc #: 1/PCE 10
ROCK = APHYRIC BASALT
Texture: INTERSTITIAL-SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): TO 1.5
APPROX COMP AN65;
CLINOPYROXENE ( 20%)
Size(mm): TO 0.6
APPROX COMP AUG.;
GLASS ( 10%)
DEVITRIFIED,PARTLY ALTERED;
MAGNETITE ( 1%)
Size(mm): <0.1
Alteration - PALAGONITE
Location: PATCHES AND Replacing: GLASS
Location: IRREGULAR
Location: ZONES
Vesicles -
Size(mm): 0.2-4
Percent: 25
Location: SCATTERED
Filling: SOME PALAGONITE
Shape: ROUND TO
Filling: INCRUSTATIONS
Shape: IRREGULAR
Leg : 60 Top/Bottom Interval(mm): 400/ 440 Describer: Sharaskin, A.
Hole: 454A Top of Core Depth(m) : 122.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 122.42 Sect/Pc #: 1/PCE 4B
ROCK = APHYRIC BASALT
VERY SCARCE MICROPHENOCRYSTS NEAR THE ZONE OF
CARBONIZATION;
Texture: INTERSTITIAL-SUBOPHITIC;
Where sampled: FLOW INTERIOR
AREA UNCERTAIN*
Phenocrysts- OLIVINE ( TR%)
Size(mm): 0.3
PLAGIOCLASE ( TR%)
Size(mm): 0.7
CLINOPYROXENE ( TR%)
Size(mm): 0.25
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): TO 1.2
APPROX COMP AN65;
CLINOPYROXENE ( 25%)
Size(mm): TO 0.8
APPROX COMP AUG.;
GLASS ( 5%)
DEVITRIFIED;
MAGNETITE ( 1%)
Size(mm): <0.1
Alteration - CARBONATE
Location: VEINS,ZONES Replacing: GROUNDMASS
Location: (IRREGULAR)
COULD BE ARAGONITE;
CHLORITE
Location: VESICLES
Vesicles -
Size(mm): 0.2-7
Percent: 25
Location: SCATTERED
Filling: CARB
Shape: IRREGULAR
Leg : 60 Top/Bottom Interval(mm): 710/ 750 Describer: Sharaskin, A.
Hole: 454A Top of Core Depth(m) : 122.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 127.23 Sect/Pc #: 4/PCE 3
ROCK = MICROPORPHYRITIC TO APHYRIC BASALT;
Texture: SUBOPHITIC;
Where sampled: FLOW INTERIOR
AREA UNCERTAIN*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): TO 1.2
APPROX COMP AN65-70;
CLINOPYROXENE ( 22%)
Size(mm): TO 1.0
APPROX COMP AUG.;
GLASS ( 22%)
DEVITRIFIED;
MAGNETITE ( 2%)
Size(mm): <0.1
OLIVINE ( 2%)
Size(mm): 0.2-0.4
APPROX COMP FO80-85*
Alteration - COMBINATION ( 15%)
Location: VESICLES AND Replacing: GLASS
Location: GROUNDMASS
INCLUDES PALAGONITE + CHLORITE*
Vesicles -
Size(mm): 0.2-3
Percent: 12
Location: SCATTERED
Filling: PALAGONITE
Shape: ROUND TO
Filling: INCRUSTATIONS,
Shape: IRREGULAR
Filling: ZEOLITES
Leg : 60 Top/Bottom Interval(mm): 1000/1040 Describer: Sharaskin, A.
Hole: 454A Top of Core Depth(m) : 131.00 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 132.02 Sect/Pc #: 1/PCE 12
ROCK = APHYRIC BASALT;
Texture: SUBOPHITIC-INTERSTITIAL;
Where sampled: FLOW INTERIOR
AREA UNCERTAIN*
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): TO 1.0
APPROX COMP AN65;
CLINOPYROXENE ( 35%)
Size(mm): TO 0.5
APPROX COMP AUG.;
GLASS ( 3%)
DEVITRIFIED,ALTERED;
MAGNETITE ( 1%)
Size(mm): <0.1
OLIVINE ( <1%)
Alteration - CLAY MINERALS
Replacing: IRREGULAR
ZEOLITE
PALAGONITE ( 3%)
Location: PATCHES AND Replacing: GLASS
Location: IRREGULAR
Location: ZONES
FILLING VESICLES*
Vesicles -
Size(mm): 0.1-1.2
Percent: 15
Location: SCATTERED
Filling: PALAG,CLAY,ZEOL
Shape: ROUND TO
Leg : 60 Top/Bottom Interval(mm): 240/ 260 Describer: Meijer, A.
Hole: 454A Top of Core Depth(m) : 131.00 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 132.75 Sect/Pc #: 2/PCE 3
ROCK = APHYRIC BASALT;
Texture: INTERGRANULAR-INTERSERTAL;
Where sampled: FLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 15%)
Size(mm): 0.1-0.8 Morphology: SKELETAL TO ACICULAR
COMP UNCERTAIN;
GLASS ( 15%)
PARTLY ALTERED TO CLAYS;
CLINOPYROXENE ( 15%)
Size(mm): 0.1-0.5 Morphology: GRANULES TO SUBOPHITIC
APPROX COMP AUG.;
MAGNETITE ( 5%)
Size(mm): 0.01-0.02
IN GLASS*
Alteration - CARBONATE ( 2%)
Location: INTERSTICES Replacing: OOID
CLAY MINERALS ( 3%)
Location: INTERSTICES Replacing: GLASS
REPLACING GLASS UNCERTAIN,CLAY IS YELLOW-GREEN*
Vesicles -
Size(mm): 0.1-1.0
Percent: 50
Location: THROUGHOUT
Filling: NONE
Shape: IRREGULAR
Leg : 60 Top/Bottom Interval(mm): 20/ 40 Describer: Meijer, A.
Hole: 454A Top of Core Depth(m) : 149.00 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 149.03 Sect/Pc #: 1/PCE 1
ROCK = APHYRIC BASALT;
Texture: INTERSERTAL,PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.2-0.7 Morphology: EUHEDRAL
APPROX COMP FO85-90,OFTEN IN CLUSTERS OF 5-10 XLS
WITH BROWN SPINEL INCLUSIONS*
Groundmass - PLAGIOCLASE ( 25%)
Size(mm): 0.2-1.0 Morphology: SKELETAL TO ACICULAR
GLASS ( 25%)
MOSTLY FRESH BROWN GLASS;
OLIVINE ( 4%)
Size(mm): 0.05-0.2 Morphology: SKELETAL TO EUHEDRAL
COMP UNCERTAIN;
MAGNETITE ( 4%)
Size(mm): 0.01-0.02 Morphology: EUHEDRAL
IN GLASS,COMP UNCERTAIN*
Alteration - CLAY MINERALS ( 1-2%)
Location: INTERSTICES Replacing: GLASS
YELLOW COLOR*
Vesicles -
Size(mm): 0.1-1.0
Percent: 40
Location: THROUGHOUT
Filling: NONE
Shape: ROUND TO
Shape: OVOID
Leg : 60 Top/Bottom Interval(mm): 130/ 150 Describer: Meijer, A.
Hole: 454A Top of Core Depth(m) : 158.00 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 158.14 Sect/Pc #: 1/PCE 2
ROCK = APHYRIC BASALT;
Texture: INTERSERTAL;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.3-0.5 Morphology: EUHEDRAL TO SKELETAL
APPROX COMP FO85-90,CONTAINS BROWN SPINEL;
INCLUSIONS*
Groundmass - GLASS ( 22%)
QUENCH TEXTURED;
PLAGIOCLASE ( 18%)
Size(mm): 0.1-0.5 Morphology: SKELETAL
COMP UNCERTAIN;
OLIVINE ( 3%)
Size(mm): 0.1-0.2 Morphology: SKELETAL
COMP UNCERTAIN*
Alteration - CLAY MINERALS ( 1%)
Location: INTERSTICES Replacing: GLASS
YELLOW COLOR*
Vesicles -
Size(mm): 0.1-0.4
Percent: 55
Location: THROUGHOUT
Filling: NONE
Shape: OVOID
Leg : 60 Top/Bottom Interval(mm): 330/ 360 Describer: Meijer, A.
Hole: 454A Top of Core Depth(m) : 162.00 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 162.35 Sect/Pc #: 1/PCE 6
ROCK = APHYRIC BASALT;
Texture: MICROPORPHYRITIC-INTERSERTAL;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.1-0.5 Morphology: EUHEDRAL
APPROX COMP FO85-90,BROWN SPINEL INCLUSIONS*
Groundmass - GLASS ( 22%)
Morphology: QUENCH
PARTLY ALTERED TO GREEN CLAY;
PLAGIOCLASE ( 20%)
Size(mm): 0.1-0.5 Morphology: IRREGULAR TO SKELETAL
COMP UNCERTAIN;
OLIVINE ( 3%)
Size(mm): 0.05-0.1 Morphology: IRREGULAR TO SKELETAL
COMP UNCERTAIN;
MAGNETITE ( 3%)
Size(mm): 0.01-0.02
Alteration - CLAY MINERALS ( <1%)
Location: INTERSTICES Replacing: GLASS
YELLOW COLOR,GLASS UNCERTAIN*
Vesicles -
Percent: 50
Leg : 60 Top/Bottom Interval(mm): 1110/1140 Describer: Meijer, A.
Hole: 454A Top of Core Depth(m) : 162.00 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 163.13 Sect/Pc #: 1/PCE 8
ROCK = APHYRIC BASALT;
Texture: PORPHYRITIC QUENCH;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 0.1-0.4 Morphology: SKELETAL TO EUHEDRAL
APPROX COMP FO85-90,BROWN SPINEL INCLUSIONS*
Groundmass - GLASS ( 80%)
QUENCH PRODUCT,HERRINGBONE TEXTURE + SOME
SPHERULITES*
Alteration - CLAY MINERALS ( 1-2%)
Vesicles -
Size(mm): 0.02-0.1
Percent: 15
Location: SPHERULITES
Filling: NONE
Shape: IRREGULAR
Leg : 60 Top/Bottom Interval(mm): 20/ 40 Describer: Meijer, A.
Hole: 454A Top of Core Depth(m) : 162.00 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 163.53 Sect/Pc #: 2/PCE 1
ROCK = APHYRIC BASALT;
Texture: PORPHYRITIC QUENCH;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.1-0.5 Morphology: SKELETAL TO EUHEDRAL
APPROX COMP FO85-90,MAINLY QUENCH XTLS WITH BROWN
SPINEL INCLUSIONS*
Groundmass - GLASS ( 26%)
QUENCH TEXTURE;
PLAGIOCLASE ( 25%)
Size(mm): 0.01-0.5 Morphology: QUENCH XTLS
COMP UNCERTAIN;
OLIVINE ( 2%)
Size(mm): 0.05-0.1 Morphology: SWALLOWTAIL
APPROX COMP FO85-90*
Alteration - CHLOROPHAEITE
Replacing: GLASS
YELLOW GLASS*
Vesicles -
Size(mm): 0.05-0.2
Percent: 45
Location: THROUGHOUT
Filling: NONE
Shape: OVOID TO
Shape: IRREGULAR
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