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 |
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]
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