Leg : 64 Top/Bottom Interval(mm): 1490/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 515.00 Rock Type: IGNEOUS Core: 39 Sample Midpoint(m) : 519.49 Sect/Pc #: 3/PCE 1B ROCK = PLAG PHYRIC BASALT; Texture: PORPHYRITIC,QUENCHED FINE-GRAINED VARIOLITIC/SUBSPHERULITIC GROUNDMASS COMPRISING PLAG MICROLITES + PYX + DISSEMINATED OP.MINS + MESOSTASIS; Where sampled: NEXT TO GLASSY MARGIN SILL EDGE* Phenocrysts- OLIVINE ( 0%) PLAGIOCLASE ( 15%) Size(mm): TO 2 Morphology: SUBHEDRAL,TABULAR,LATH-SHAPED SPINEL ( 2%) Size(mm): 0.1-0.2 Morphology: EUHEDRAL CR-SPINEL,MICROPHENOS* Groundmass - PLAGIOCLASE MICROLITES; PYROXENE OPAQUE MINERALS DISSEMINATED; MESOSTASIS Alteration - OTHER ( 20%) Location: PSEUDOMORPHS Replacing: OL MINERAL NOT IDENTIFIED,REPLACING OL IS QUESTIONABLE* Leg : 64 Top/Bottom Interval(mm): 650/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 515.00 Rock Type: IGNEOUS Core: 39 Sample Midpoint(m) : 520.15 Sect/Pc #: 4/PCE 8 ROCK = DOLERITE; Texture: SUBOPHITIC,SERIATE; Where sampled: OTHER ABOUT 70 CM BELOW THE SILL/SEDIMENT CONTACT* Phenocrysts- OLIVINE ( 5%) Size(mm): TO 2 Morphology: SUBHEDRAL FRACTURED,ALTERED,GROUNDMASS TO 2 MM* Groundmass - OLIVINE ( 10%) Size(mm): 0.1-0.6 Morphology: ANHEDRAL-SUBHEDRAL ALTERED; PLAGIOCLASE ( 40%) Size(mm): 0.4-1.0 Morphology: SUBHEDRAL LATHS OCCASIONALLY OPHITICALLY ENCLOSED IN PYX,UNZONED, APPROX COMP AN50; CLINOPYROXENE ( 35%) Size(mm): 0.4-1.0 Morphology: ANHEDRAL-EUHEDRAL APPROX COMP AUGITE?,PALE BROWN,ENCLOSING PLAG IN MAGNETITE ( 5%) Size(mm): 0.1 Morphology: SUBHEDRAL GENERALLY INTERSTITIAL; ALKALI FELDSPAR ( 5%) Size(mm): 0.1 PERCENTAGE QUESTIONABLE,INTERSTITIAL FELDSPAR, PROBABLY PLAG* Alteration - BOWLINGITE ( 2-3%) Replacing: OL SURROUNDING OL* Vesicles - Percent: 0 NONE SEEN* Leg : 64 Top/Bottom Interval(mm): 700/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 524.50 Rock Type: IGNEOUS Core: 40 Sample Midpoint(m) : 525.20 Sect/Pc #: 1/PCE 2B ROCK = OL PHYRIC DOLERITE; Texture: PORPHYRITIC,SUBDOLERITIC; Where sampled: OTHER SILL INTERIOR* Phenocrysts- OLIVINE ( 25%) Size(mm): 0.5-2 Morphology: SUBHEDRAL-ANHEDRAL Groundmass - OLIVINE ( 10%) Size(mm): 0.2-0.5 Morphology: SUBHEDRAL,ROUNDED MAY BE MICROPHENOS; PLAGIOCLASE ( 40%) Size(mm): TO 1.0 Morphology: SUBHEDRAL LATHS APPROX COMP AN52,UNZONED; CLINOPYROXENE ( 25%) Size(mm): 0.2-0.8 Morphology: ANHEDRAL APPROX COMP AUGITE,INTERSTITIAL,BROWN,MAY BE TI02-RICH; MAGNETITE ( 2%) Morphology: SUBHEDRAL Alteration - BOWLINGITE ( <1%) Replacing: OL AROUND OL XTLS* Vesicles - Percent: 0 NONE SEEN* Leg : 64 Top/Bottom Interval(mm): 380/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 524.50 Rock Type: IGNEOUS Core: 40 Sample Midpoint(m) : 526.38 Sect/Pc #: 2/PCE 3E ROCK = OL PHYRIC DOLERITE; Texture: PORPHYRITIC,DOLERITIC-INTERGRANULAR; Where sampled: OTHER SILL INTERIOR,ADJACENT TO ALTERED VEINS* Phenocrysts- OLIVINE ( 30%) Size(mm): 0.5-3 Morphology: SUBHEDRAL-EUHEDRAL COMPLETELY ALTERED TO GREEN CLAY.MIN (BOWLINGITE)* Groundmass - OLIVINE ( 10%) Size(mm): 0.3-0.6 COMPLETELY PSEUDOMORPHED BY BOWLINGITE; PLAGIOCLASE ( 30%) Size(mm): 0.3-0.8 Morphology: SUBHEDRAL LATHS APPROX COMP AN50; CLINOPYROXENE ( 30%) Size(mm): 0.3-0.8 Morphology: ANHEDRAL APPROX COMP AUGITE,INTERSTITIAL TO PLAG; MAGNETITE ( 5%) Size(mm): <0.3 Morphology: SUBHEDRAL Alteration - COMBINATION ( 40%) Location: PSEUDOMORPHS Replacing: OL INCLUDES BWLGITE + TALC,ALL OL REPLACED BY GREEN CLAY.MINS* Vesicles - Percent: 0 NONE SEEN* Leg : 64 Top/Bottom Interval(mm): 1290/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 534.00 Rock Type: IGNEOUS Core: 41 Sample Midpoint(m) : 541.29 Sect/Pc #: 5/PCE 1A ROCK = OL-PLAG VITROPHYRIC BASALT; Texture: HYALOPILITIC,VARIOLITIC,GLASSY,CHILLED; Where sampled: GLASSY MARGIN + NEXT TO GLASSY MARGIN + SEDIMENT UPPER CONTACT OF SECOND DOLERITE SILL WITH BASALT CHILL ZONE* Phenocrysts- OLIVINE ( 15%) Size(mm): 0.5-1.2 Morphology: EUHEDRAL ALTERED; PLAGIOCLASE ( 5%) Size(mm): 0.1-0.2 Morphology: LATHS MICROPHENOS + CHILL OVERGROWTHS; SPINEL ( 2%) Size(mm): 0.1 Morphology: SUBHEDRAL CHROMITE MICROPHENOS* Groundmass - MICROCRYST GROUNDMASS ( 70%) Size(mm): <0.2 INCLUDES OL + PLAG + CPX,MICROLITES,VERY FINE GRAINED,INDISTINGUISHABLE* Alteration - CARBONATE ( 10%) Location: VEINS,GLASS IN NARROW VEINS (0.5 MM) CROSS-CUTTING GLASS + SEDIMENT,IN GLASS; CLAY MINERALS ( 2%) Location: GLASS Replacing: GLASS Leg : 64 Top/Bottom Interval(mm): 380/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 534.00 Rock Type: IGNEOUS Core: 41 Sample Midpoint(m) : 541.88 Sect/Pc #: 6/PCE 5 ROCK = OL PHYRIC DOLERITE OR COARSE BASALT; Texture: PORPHYRITIC,DOLERITIC; Where sampled: OTHER SILL INTERIOR,ADJACENT TO 2 MM WIDE VEIN* Phenocrysts- OLIVINE ( 15%) Size(mm): 0.3-1 Morphology: SUBHEDRAL-EUHEDRAL COMPLETELY REPLACED BY BOWLINGITE* Groundmass - OLIVINE ( 5%) Size(mm): 0.10 COMPLETELY REPLACED BY BOWLINGITE; PLAGIOCLASE ( 45%) Size(mm): 0.10-0.5 Morphology: SUBHEDRAL APPROX COMP AN50; CLINOPYROXENE ( 30%) Size(mm): 0.1-0.5 Morphology: ANHEDRAL APPROX COMP AUGITE (TITANIFEROUS?); MAGNETITE ( 2%) Size(mm): 0.01-0.1 Morphology: SUBHEDRAL-EUHEDRAL Alteration - CARBONATE Location: VEIN CARB COMPOSES 5% OF THE 2 MM WIDE VEIN; ZEOLITE Location: VEIN ZEOLITES COMPOSE 95% OF THE 2 MM WIDE VEIN, TRIGONAL? CHABAZITE?; BOWLINGITE ( 20%) Replacing: OL OL COMPLETELY REPLACED* Vesicles - Percent: 0 NONE SEEN* Leg : 64 Top/Bottom Interval(mm): 680/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 543.50 Rock Type: IGNEOUS Core: 42 Sample Midpoint(m) : 544.18 Sect/Pc #: 1/PCE 2A ROCK = OL-PLAG PHYRIC DOLERITE; Texture: PORPHYRITIC,SUBOPHITIC,FINE GRAINED; Where sampled: OTHER SILL INTERIOR* Phenocrysts- OLIVINE ( 25%) Size(mm): 0.5-2 Morphology: SUBHEDRAL-ANHEDRAL MOSTLY ALTERED TO BOWLINGITE; PLAGIOCLASE ( 2%) Size(mm): 0.5 Morphology: SUBHEDRAL,BROAD,TABULAR ISOLATED PHENOS; SPINEL ( 2%) Size(mm): 0.05-0.1 Morphology: SUBHEDRAL RED ?CHROMITE* Groundmass - OLIVINE ( 10%) Size(mm): <0.5 Morphology: ANHEDRAL ALTERED TO BOWLINGITE; PLAGIOCLASE ( 40%) Size(mm): 0.2-1.0 Morphology: SUBHEDRAL LATHS APPROX COMP AN56; CLINOPYROXENE ( 20%) Size(mm): 0.2-1.0 Morphology: ANHEDRAL APPROX COMP AUGITE,INTERSTITIAL,PALE BROWN; MAGNETITE ( 4%) Size(mm): 0.05-0.1 Alteration - BOWLINGITE ( 15%) Location: AROUND OL Replacing: OL COMPLETELY REPLACING OL IN PLACES* Leg : 64 Top/Bottom Interval(mm): 660/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 543.50 Rock Type: IGNEOUS Core: 42 Sample Midpoint(m) : 547.16 Sect/Pc #: 3/PCE 5D ROCK = DOLERITE; Texture: APHYRIC,SUBOPHITIC; Where sampled: OTHER SILL INTERIOR* Groundmass - OLIVINE ( 10%) Size(mm): 0.1-0.2 Morphology: ANHEDRAL 50% REPLACED BY BOWLINGITE REQUOTED UNDER ALTER.; PLAGIOCLASE ( 40%) Size(mm): 0.5-1.0 Morphology: SUBHEDRAL UNZONED; CLINOPYROXENE ( 40%) Size(mm): 0.1-0.2 Morphology: ANHEDRAL APPROX COMP AUGITE,PALE BROWN,SUBOPHITICALLY ENCLOSING PLAG; MAGNETITE ( 3%) Size(mm): 0.1-0.2 MAY BE GROUNDMASS PHASE* Alteration - CLAY MINERALS ( 2%) Location: GROUNDMASS FOUND IN GROUNDMASS AROUND VESICLES; BOWLINGITE ( 5%) Location: SURROUNDING Replacing: OL Location: OL Vesicles - Size(mm): 1.5-2 Percent: 2 Location: RANDOM Filling: SMEC Shape: SPHERICAL FILLING CONSISTS OF THIN LININGS OF GREEN SMEC* Leg : 64 Top/Bottom Interval(mm): 1180/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 553.00 Rock Type: IGNEOUS Core: 43 Sample Midpoint(m) : 554.18 Sect/Pc #: 1/PCE 4J ROCK = PLAG-OL MODERATELY PHYRIC DOLERITE; Texture: MODERATELY PORPHYRITIC,FINE-GRAINED ALMOST BASALTIC; Where sampled: OTHER SILL INTERIOR* Phenocrysts- OLIVINE ( 5%) Size(mm): 0.5 Morphology: SUBHEDRAL MICROPHENOS; PLAGIOCLASE ( 5%) Size(mm): <2 Morphology: ELONGATE,TABULAR,SUBHEDRAL APPROX COMP AN55-60* Groundmass - OLIVINE ( 20%) Size(mm): 0.1-0.5 Morphology: SUBHEDRAL PROBABLY GROWING IN SITU,INTERSTITIAL; PLAGIOCLASE ( 40%) Size(mm): 0.2-1.0 Morphology: LATHS,RADIAL CLUSTERS RADIAL CLUSTERS (VARIOLES) FREQUENT; CLINOPYROXENE PROBABLY IN MESOSTASIS; MAGNETITE ( 5%) ILMENITE ( 5%) OTHER ( 20%) AMORPHOUS GROUNDMASS,MAINLY ALTERED TO YELLOW CLAY.MIN* Alteration - CLAY MINERALS ( 20%) Replacing: MESOSTASIS AMORPHOUS MESOSTASIS MAINLY ALTERED TO YELLOW CLAY.MIN* Vesicles - Size(mm): 0.4-0.6 Percent: 2 Location: RANDOM Filling: CALCITE Shape: SPHERICAL VESICLES HAVE A MESOSTASIS RIM WITH A CALCITE FILLING* Leg : 64 Top/Bottom Interval(mm): 200/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 553.00 Rock Type: IGNEOUS Core: 43 Sample Midpoint(m) : 554.70 Sect/Pc #: 2/PCE 1B ROCK = APHYRIC BASALT OR DOLERITE; Texture: APHYRIC,SUBDOLERITIC; Where sampled: OTHER ADJACENT TO VEIN* Groundmass - PLAGIOCLASE ( 40%) Size(mm): TO 1.5 Morphology: LATH-SHAPED CLINOPYROXENE ( 20%) Size(mm): TO 1 Morphology: ELONGATE,ANHEDRAL APPROX COMP AUGITE; MAGNETITE ( 5%) Morphology: GRANULAR ILMENITE ( 2%) Size(mm): TO 0.1 Morphology: ELONGATE,SKELETAL,DENDRITIC Alteration - CLAY MINERALS ( 10%) Location: GROUNDMASS, Replacing: MESOSTASIS,OL Location: VESICLES ?REPLACING MESOSTASIS OR OL; ZEOLITE ( 20%) Location: VEIN Vesicles - Size(mm): TO 3 Percent: 5 Location: RANDOM Filling: CLAY.MIN Shape: SPHERICAL CLAY.MIN ARE GREEN* Leg : 64 Top/Bottom Interval(mm): 70/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 562.50 Rock Type: IGNEOUS Core: 44 Sample Midpoint(m) : 562.57 Sect/Pc #: 1/PCE 1A ROCK = PLAG MODERATELY PHYRIC BASALT; Texture: MODERATELY PORPHYRITIC,BASALTIC, HYALOCRYSTALLINE; Where sampled: GLASSY MARGIN* Phenocrysts- PLAGIOCLASE ( 5%) Size(mm): 0.5-1.0 Morphology: LATH-LIKE,TABULAR Groundmass - PLAGIOCLASE ( 40%) Size(mm): 0.05-0.1 MICROLITES; MAGNETITE ( 5%) Size(mm): 0.01-0.02 Morphology: CUBES Alteration - CLAY MINERALS ( 30%) Location: THROUGHOUT Replacing: MESOSTASIS ZEOLITE ( 5%) Location: VESICLES Vesicles - Size(mm): 0.5-4.0 Percent: 20 Location: CHILL ZONE Filling: MESOSTASIS, Shape: REGULAR, Filling: PALAG,ZEOLITES Shape: IRREGULAR REGULAR SHAPED VESICLES ARE FILLED WITH MESOSTASIS AND IRREGULAR SHAPED ONES ARE FILLED WITH PALAG + ZEOLITES* Leg : 64 Top/Bottom Interval(mm): 1050/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 562.50 Rock Type: IGNEOUS Core: 44 Sample Midpoint(m) : 563.55 Sect/Pc #: 1/PCE 12A ROCK = APHYRIC BASALT; Texture: APHYRIC,VARIOLITIC,INTERSERTAL* Groundmass - OLIVINE ( 0%) PLAGIOCLASE ( 50%) Size(mm): <0.5 Morphology: SKELETAL VARIOLITIC AGGREGATES; CLINOPYROXENE ( 20%) Size(mm): <0.1 Morphology: QUENCH,PLUMOSE GROWING ON PLAG; MAGNETITE ( 3%) DISSEMINATED; MESOSTASIS ( 15%) Alteration - CLAY MINERALS ( 10%) Location: MESOSTASIS, Replacing: MESOSTASIS Location: VESICLES GREENISH IN COLOR* Vesicles - Size(mm): 0.3-0.8 Percent: 15 Location: RANDOM Filling: MESOSTASIS, Shape: SPHERICAL Filling: CLAY.MIN Leg : 64 Top/Bottom Interval(mm): 560/ 0 Describer: Fornari, D. Hole: 474A Top of Core Depth(m) : 562.50 Rock Type: IGNEOUS Core: 44 Sample Midpoint(m) : 564.56 Sect/Pc #: 2/PCE 8A ROCK = PLAG-CPX-OL PHYRIC BASALT; Texture: PORPHYRITIC,INTERSERTAL-HYALOPILITIC; Where sampled: PILLOW INTERIOR 20 CM BELOW GLASSY SELVAGE OF PILLOW* Phenocrysts- OLIVINE ( 2%) Size(mm): TO 0.5 Morphology: EUHEDRAL-SUBHEDRAL CORRODED; PLAGIOCLASE ( 20%) Size(mm): 0.5-2 Morphology: LATHS APPROX COMP AN50-60,MICROLITES; CLINOPYROXENE ( 5%) Size(mm): 0.25-1 Morphology: SUBHEDRAL APPROX COMP AUGITE,CORRODED,PROBABLY ALTERED OL* Groundmass - PLAGIOCLASE ( 15%) CLINOPYROXENE ( 5%) ILMENITE ( 5%) GLASS ( 50%) Alteration - CLAY MINERALS Location: VESICLES ZEOLITE Location: VESICLES Vesicles - Size(mm): 0.1-1 Percent: 5 Location: DISPERSED Filling: CLAY.MIN, Shape: ROUND- Filling: ZEOLITES Shape: SUBROUND PERIPHERY IS IRREGULAR,VESICLES ARE COMPLETELY FILLED* Leg : 64 Top/Bottom Interval(mm): 380/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 562.50 Rock Type: IGNEOUS Core: 44 Sample Midpoint(m) : 565.88 Sect/Pc #: 3/PCE 5B ROCK = PLAG PHYRIC BASALT; Texture: PORPHYRITIC,VARIOLITIC GROUNDMASS; Where sampled: FLOW INTERIOR* Phenocrysts- OLIVINE ( 0%) PLAGIOCLASE ( 5%) Size(mm): 1-4 Morphology: TABULAR,SUBHEDRAL LARGE AGGREGATES,ZONED,RESORBED EDGES; PLAGIOCLASE ( 30%) Size(mm): 0.4-2.5 Morphology: ELONGATE MICROPHENOS; CLINOPYROXENE ( 0%) SPINEL ( 2-4%) Size(mm): 0.01-0.05 Morphology: CUBIC IN GROUNDMASS AND PLAG PHENOS* Groundmass - OLIVINE ( 5%) Size(mm): <0.2 PERCENTAGE QUESTIONABLE,INTERSTITIAL,QUENCHED; PLAGIOCLASE ( 20%) Size(mm): 0.2-0.5 Morphology: SKELETAL MICROLITIC; CLINOPYROXENE ( 15%) Size(mm): <0.4 Morphology: SKELETAL,DENDRITIC QUENCH; MAGNETITE ( 5%) Size(mm): 0.01-0.1 Morphology: ANHEDRAL-CUBIC IN GROUNDMASS; OTHER ( 10%) AMORPHOUS MESOSTASIS,REPLACED BY CLAY.MIN* Alteration - CARBONATE ( 1%) Location: VESICLES CLAY MINERALS ( 10%) Location: RANDOM Replacing: MESOSTASIS Vesicles - Size(mm): 0.2-0.5 Percent: 10 Location: RANDOM Filling: CALCITE, Shape: SPHERICAL Filling: CLAY.MIN Leg : 64 Top/Bottom Interval(mm): 1070/ 0 Describer: Fornari, D. Hole: 474A Top of Core Depth(m) : 562.50 Rock Type: IGNEOUS Core: 44 Sample Midpoint(m) : 569.57 Sect/Pc #: 5/PCE 14A ROCK = PLAG-OL-CPX PHYRIC BASALT; Texture: PORPHYRITIC,SUBOPHITIC,INTERGRANULAR; Where sampled: FLOW INTERIOR* Phenocrysts- OLIVINE ( 5%) Size(mm): 0.1-0.3 Morphology: EUHEDRAL-SUBHEDRAL PARTIALLY REPLACED; PLAGIOCLASE ( 10%) Size(mm): TO 2 Morphology: LATHS CLINOPYROXENE ( 5%) Size(mm): 0.1-0.3 Morphology: EUHEDRAL-SUBHEDRAL APPROX COMP AUGITE?,PARTIALLY REPLACED (PROBABLY ALTERED OL)* Groundmass - OLIVINE ( 10%) PLAGIOCLASE ( 25%) CLINOPYROXENE ( 15%) ILMENITE ( 5%) GLASS ( 30%) Alteration - CLAY MINERALS Location: LATH EDGES Replacing: PLAG LATHS MANY CPX AND OL MODERATELY TO COMPLETELY REPLACED BY ALTERATION PRODUCTS* Vesicles - Percent: 0 Leg : 64 Top/Bottom Interval(mm): 20/ 0 Describer: Fornari, D. Hole: 474A Top of Core Depth(m) : 572.00 Rock Type: IGNEOUS Core: 45 Sample Midpoint(m) : 572.02 Sect/Pc #: 1/PCE 1 ROCK = PLAG-CPX PHYRIC BASALT; Texture: PORPHYRITIC,SUBOPHITIC; Where sampled: FLOW INTERIOR JUST BELOW PILLOW INTERIORS AS CLAYSTONE OCCURS ABOVE* Phenocrysts- OLIVINE ( 0%) PLAGIOCLASE ( 50%) Size(mm): 0.5-2 Morphology: LATHS SOME INTERGROWTHS; CLINOPYROXENE ( 20%) Size(mm): 0.25-5 Morphology: SUBHEDRAL-ANHEDRAL TITANIFEROUS; SPINEL ( 0%) Groundmass - OLIVINE ( 2%) PERCENTAGE QUESTIONABLE; PLAGIOCLASE ( 15%) CLINOPYROXENE ( 5%) OPAQUE MINERALS ( 3%) INCLUDES MAGN + ILMENITE; GLASS ( 5%) Alteration - CARBONATE Location: VEINLETS CLAY MINERALS ( 0%) ZEOLITE Location: VEINLETS Vesicles - Percent: 0 Leg : 64 Top/Bottom Interval(mm): 70/ 0 Describer: Fornari, D. Hole: 474A Top of Core Depth(m) : 572.00 Rock Type: IGNEOUS Core: 45 Sample Midpoint(m) : 576.57 Sect/Pc #: 4/PCE 1A ROCK = PLAG-CPX-OL PHYRIC DOLERITE; Texture: PORPHYRITIC,SUBOPHITIC; Where sampled: OTHER SILL AT BASE OF FLOW* Phenocrysts- OLIVINE ( 5%) Size(mm): 0.25-0.6 Morphology: SUBHEDRAL-ANHEDRAL ALL ALTERED AND REPLACED BY BOWLINGITE; PLAGIOCLASE ( 50%) Size(mm): 0.5-2 Morphology: LATHS CLINOPYROXENE ( 10%) Size(mm): 0.25-1 Morphology: ANHEDRAL LATHS APPROX COMP AUGITE,FRACTURED ALONG CLEAVAGE TRACES* Groundmass - PLAGIOCLASE ( 20%) CLINOPYROXENE ( 5%) MAGNETITE ( 3%) Size(mm): 0.1 ILMENITE ( 3%) Size(mm): 0.1-0.3 GLASS ( 4%) ALTERED* Alteration - BOWLINGITE ( 5%) Location: OL Replacing: OL Vesicles - Percent: 0 Leg : 64 Top/Bottom Interval(mm): 100/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 581.00 Rock Type: IGNEOUS Core: 46 Sample Midpoint(m) : 581.10 Sect/Pc #: 1/PCE 2A ROCK = PLAG MODERATELY PHYRIC DOLERITE; Texture: MODERATELY PORPHYRITIC,SUBOPHITIC; Where sampled: OTHER SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 5%) Size(mm): 2 Morphology: TABULAR,AGGREGATES RESORBED MAGMA,ZONED* Groundmass - OLIVINE ( 5%) Size(mm): 0.3-0.5 Morphology: ANHEDRAL PLAGIOCLASE ( 40%) Size(mm): 0.3-1.0 Morphology: LATH-LIKE APPROX COMP AN45-55,ZONED,OPHITICALLY ENCLOSED IN CPX; CLINOPYROXENE ( 40%) Size(mm): TO 2 Morphology: ANHEDRAL,PLATE-LIKE APPROX COMP AUGITE,PALE BROWN,PLATE-LIKE XTLS FREQUENTLY ENCLOSING PLAG; MAGNETITE ( 5%) Size(mm): <0.5 Morphology: ANHEDRAL-EUHEDRAL Leg : 64 Top/Bottom Interval(mm): 1100/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 581.00 Rock Type: IGNEOUS Core: 46 Sample Midpoint(m) : 582.10 Sect/Pc #: 1/PCE 2F ROCK = PLAG MODERATELY PHYRIC DOLERITE; Texture: MODERATELY PORPHYRITIC,SUBOPHITIC; Where sampled: OTHER SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 5%) Size(mm): 2-5 Morphology: TABULAR,AGGREGATES RESORBED MARGINS,ZONED* Groundmass - OLIVINE ( 5%) Size(mm): 0.3-0.5 Morphology: ANHEDRAL PLAGIOCLASE ( 40%) Size(mm): 0.3-1.0 Morphology: LATH-LIKE APPROX COMP AN40-50,OPHITICALLY ENCLOSED IN CPX; CLINOPYROXENE ( 40%) Size(mm): TO 2 Morphology: ANHEDRAL,PLATE-LIKE APPROX COMP AUGITE,PALE BROWN,PLATE-LIKE XTLS FREQUENTLY ENCLOSING PLAG; MAGNETITE ( 5%) Size(mm): <0.5 Morphology: ANHEDRAL-EUHEDRAL Alteration - BOWLINGITE ( 5%) Location: OL Replacing: OL Leg : 64 Top/Bottom Interval(mm): 210/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 581.00 Rock Type: IGNEOUS Core: 46 Sample Midpoint(m) : 582.71 Sect/Pc #: 2/PCE 3 ROCK = PLAG PHYRIC BASALT; Texture: PORPHYRITIC,PILOTAXITIC GROUNDMASS; Where sampled: FLOW INTERIOR* Phenocrysts- OLIVINE SEE ALTERATION CODES; PLAGIOCLASE ( 5%) Size(mm): 1-6 Morphology: SUBHEDRAL,TABULAR APPROX COMP AN70,MANY INCLUSIONS,RESORBED MARGINS, ZONED,MEGACRYSTS; PLAGIOCLASE ( 10%) Size(mm): 0.5-1 Morphology: SUBHEDRAL,LATH-LIKE OR Morphology: TABULAR APPROX COMP ?AN60-70; SPINEL ( 3%) Size(mm): 0.1-0.2 Morphology: CUBIC ?CHROME SPINEL* Groundmass - PLAGIOCLASE ( 20%) Size(mm): 0.2-0.4 QUENCH TEXTURE,MICROLITES; CLINOPYROXENE ( 20%) Size(mm): <0.1 Morphology: DENDRITIC QUENCH TEXTURE; MAGNETITE ( 10%) Size(mm): <0.1 DISSEMINATED,QUENCH TEXTURE; OTHER ( 30%) AMORPHOUS GROUNDMASS (MESOSTASIS)* Alteration - CLAY MINERALS ( 5%) Location: GROUNDMASS Replacing: MESOSTASIS BOWLINGITE ( 5%) Location: RANDOM Replacing: OL IN EUHEDRAL PSEUDOMORPHS OF OL (0.5-1.0 MM ACROSS)* Leg : 64 Top/Bottom Interval(mm): 350/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 581.00 Rock Type: IGNEOUS Core: 46 Sample Midpoint(m) : 582.85 Sect/Pc #: 2/PCE 5 ROCK = PLAG PHYRIC BASALT; Texture: PORPHYRITIC,PILOTAXITIC GROUNDMASS; Where sampled: FLOW INTERIOR* Phenocrysts- OLIVINE SEE ALTERATION SECTION; PLAGIOCLASE ( 5%) Size(mm): 1-5 Morphology: SUBHEDRAL,TABULAR,AGGREGATES APPROX COMP AN70,MANY INCLUSIONS,RESORBED MAGMA, MEGACRYSTS; PLAGIOCLASE ( 10%) Size(mm): 0.5-1 Morphology: SUBHEDRAL,LATH-LIKE,TABULAR APPROX COMP ?AN70; SPINEL ( 3%) Size(mm): 0.1-0.2 Morphology: CUBIC ?CHROME SPINEL* Groundmass - PLAGIOCLASE ( 15%) Size(mm): 0.2-0.4 MICROLITES AND GROWING ON PHENOS; CLINOPYROXENE ( 40%) Size(mm): <0.1 Morphology: DENDRITIC,WHEAT SHEAVES PERCENTAGE QUESTIONABLE; MAGNETITE ( 5%) Size(mm): <0.1 Morphology: DISSEMINATED Alteration - CLAY MINERALS ( 5%) Location: VEINS BOWLINGITE ( 5%) Location: RANDOM Replacing: OL EUHEDRAL PSEUDOMORPHS (0.5-1.0 MM ACROSS)* Vesicles - Size(mm): 1 Percent: 5 Location: RANDOM Filling: CLAY.MIN Shape: SPHERICAL VESICLES HAVE A GREEN CLAY.MIN LINING* Leg : 64 Top/Bottom Interval(mm): 1100/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 590.00 Rock Type: IGNEOUS Core: 47 Sample Midpoint(m) : 591.10 Sect/Pc #: 1/PCE 16 ROCK = PLAG PHYRIC BASALT; Texture: PORPHYRITIC,VARIOLITIC; Where sampled: FLOW INTERIOR NEAR CLAY.MIN VEIN* Phenocrysts- OLIVINE ( 4%) Size(mm): 0.3 Morphology: SUBHEDRAL MICROPHENOS; PLAGIOCLASE ( 10%) Size(mm): 1-5 Morphology: AGGREGATES,TABULAR RESORBED EDGES; SPINEL ( <2%) Size(mm): 0.1 CR-SPINEL* Groundmass - OLIVINE ( 5%) Size(mm): <0.3 Morphology: SUBHEDRAL PROBABLY MICROPHENOS; PLAGIOCLASE ( 40%) Size(mm): 0.2-1.0 Morphology: LATHS MICROLITES AND LATHS; CLINOPYROXENE ( 20%) Size(mm): TO 1.0 Morphology: LATHS,ANHEDRAL BROWN AUGITE; MAGNETITE ( 5%) Size(mm): TO 0.3 Morphology: GRANULAR DISSEMINATED; ILMENITE ( 2%) MICROCRYST GROUNDMASS ( 20%) MESOSTASIS* Alteration - CLAY MINERALS ( 5%) Location: GROUNDMASS Vesicles - Size(mm): 0.8-1.2 Percent: 4 Location: RANDOM Filling: CLAY.MIN Shape: SPHERICAL Leg : 64 Top/Bottom Interval(mm): 1220/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 590.00 Rock Type: IGNEOUS Core: 47 Sample Midpoint(m) : 594.22 Sect/Pc #: 3/PCE 12 ROCK = PLAG-OL PHYRIC BASALT; Texture: PORPHYRITIC,VARIOLITIC-QUENCHED,PILOTAXITIC; Where sampled: NEXT TO GLASSY MARGIN* Phenocrysts- OLIVINE ( 5-8%) Size(mm): 0.3-2 Morphology: EUHEDRAL MOSTLY REPLACED BY BOWLINGITE; PLAGIOCLASE ( 15%) Size(mm): 0.5-8 Morphology: AGGREGATES,TABULAR,LATH-SHAPE LARGE AGGREGATE MEGACRYSTS,SMALLER TABULAR AND LATH-SHAPED PHENOCRYSTS; SPINEL ( 1%) Size(mm): 0.1 RED CHROME SPINEL* Groundmass - COMBINATION INCLUDES OL + PLAG + CPX + MAGN,VERY FINE GRAINED WITH PLUMOSE QUENCH PYX AND PILOTAXITIC FELDSPAR MICROLITES,DISSEMINATED ORE GRANULES; CLINOPYROXENE Morphology: PLUMOSE QUENCH; PLAGIOCLASE MICROLITES,PILOTAXITIC; MAGNETITE DISSEMINATED GRANULES* Alteration - CLAY MINERALS ( .5%) Location: GROUNDMASS BOWLINGITE ( 5%) Replacing: OL Leg : 64 Top/Bottom Interval(mm): 250/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 590.00 Rock Type: IGNEOUS Core: 47 Sample Midpoint(m) : 596.25 Sect/Pc #: 5/PCE 3 ROCK = PLAG PHYRIC BASALT; Texture: PORPHYRITIC,VARIOLITIC GROUNDMASS; Where sampled: FLOW INTERIOR* Phenocrysts- OLIVINE ( 5%) Size(mm): 0.1-0.5 Morphology: EUHEDRAL-SUBHEDRAL MICROPHENOS,ALTERED TO BOWLINGITE; PLAGIOCLASE ( >60%) Size(mm): 13 AGGREGATE OF INTERGROWN XTLS,MEGACRYSTIC,RESORBED WITH SODIUM-RICH MARGIN; SPINEL ( 2%) Size(mm): 0.1 Morphology: EUHEDRAL RED CHROME SPINEL* Groundmass - OLIVINE ( 0%) PLAGIOCLASE ( 10%) Size(mm): 0.4-1.0 Morphology: LATHS LATHS AND MICROLITES,LARGE ONES ARE MICROPHENOS; CLINOPYROXENE PRESENT BUT INDISTINGUISHABLE FROM GROUNDMASS MESOSTASIS; MAGNETITE DISSEMINATED; ILMENITE DISSEMINATED; MICROCRYST GROUNDMASS ( 20%) MESOSTASIS* Alteration - CLAY MINERALS ( 2-3%) Location: MESOSTASIS,OL ALTERATION IN MESOSTASIS AND AROUND OLIVINES; BOWLINGITE Replacing: OL Leg : 64 Top/Bottom Interval(mm): 50/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 599.00 Rock Type: IGNEOUS Core: 48 Sample Midpoint(m) : 599.05 Sect/Pc #: 1/PCE 1A ROCK = PLAG-OL PHYRIC BASALT; Texture: PORPHYRITIC,PILOTAXITIC; Where sampled: FLOW INTERIOR* Phenocrysts- OLIVINE ( 5%) Size(mm): 0.3-0.8 Morphology: EUHEDRAL-ANHEDRAL BADLY ALTERED; PLAGIOCLASE ( 5%) Size(mm): TO 5 Morphology: ROUNDED AGGREGATES ABSORBED EDGES,MEGACRYST; PLAGIOCLASE ( 10%) Size(mm): 0.3-2 Morphology: LATH-LIKE,SUBHEDRAL SPINEL ( 1%) Size(mm): 0.1-0.3 Morphology: EUHEDRAL RED CR-SPINEL,IN GROUNDMASS AND IN LARGE PLAG* Groundmass - PLAGIOCLASE ( 30%) Size(mm): 0.1-0.6 MICROLITIC; MICROCRYST GROUNDMASS ( 30%) INCLUDES CPX + MAGN + ILMENITE + MESOSTASIS,VERY FINE GRAINED,INDISTINGUISHABLE* Alteration - CALCITE ( 5%) Location: VEIN BOWLINGITE ( 10%) Location: GROUNDMASS Replacing: OL REPLACING OL AND IN GROUNDMASS* Vesicles - Size(mm): <1 Percent: 5 Location: RANDOM Filling: MESOSTASIS Shape: SPHERICAL FILLING IS IRON-RICH MESOSTASIS,MICROLITES RIM THE VESICLES* Leg : 64 Top/Bottom Interval(mm): 190/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 599.00 Rock Type: IGNEOUS Core: 48 Sample Midpoint(m) : 599.19 Sect/Pc #: 1/PCE 1C ROCK = PLAG PHYRIC BASALT; Texture: PORPHYRITIC,QUENCHED-SPHERULITIC; Where sampled: NEXT TO GLASSY MARGIN* Phenocrysts- PLAGIOCLASE ( 15%) Size(mm): TO 3 Morphology: SUBHEDRAL-ANHEDRAL SPINEL ( <1%) Size(mm): 0.1-0.2 Morphology: EUHEDRAL RED CR-SPINEL* Groundmass - MICROCRYST GROUNDMASS INCLUDES OL + PLAG + CPX + MAGN + ILMENITE,VERY FINE-GRAINED MATRIX WITH PLAG MICROLITES, SPERULITES SEEN BUT NO GLASS* Alteration - CLAY MINERALS ( 5%) Location: GROUNDMASS Replacing: MESOSTASIS Leg : 64 Top/Bottom Interval(mm): 880/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 599.00 Rock Type: IGNEOUS Core: 48 Sample Midpoint(m) : 599.88 Sect/Pc #: 1/PCE 7D ROCK = PLAG-OL PHYRIC BASALT; Texture: PORPHYRITIC,PILOTAXITIC-VARIOLITIC; Where sampled: PILLOW INTERIOR* Phenocrysts- OLIVINE ( 5%) Size(mm): 0.1-1.0 Morphology: SUBHEDRAL-EUHEDRAL OLIVINES VERY FRESH IN THIS SPECIMEN; PLAGIOCLASE ( 5%) Size(mm): 2-10 Morphology: SUBHEDRAL,TABULAR,AGGREGATES APPROX COMP AN70,MANY INCLUSIONS,RESORBED MARGINS, MEGACRYSTS; PLAGIOCLASE ( 10%) Size(mm): 0.5-1.0 Morphology: SUBHEDRAL,LATH-LIKE,TABULAR APPROX COMP AN70?; SPINEL ( 3%) Size(mm): 0.1-0.2 Morphology: CUBIC ?CHROME SPINEL* Groundmass - PLAGIOCLASE ( 15%) Size(mm): 0.1-0.5 MICROLITES; CLINOPYROXENE NOT DISTINGUISHABLE FROM MESOSTASIS; MAGNETITE ( 5%) DISSEMINATED THROUGHOUT GROUNDMASS; MICROCRYST GROUNDMASS ( 60%) MESOSTASIS* Alteration - CLAY MINERALS ( 2%) Location: MESOSTASIS Replacing: MESOSTASIS OLIVINES VERY FRESH IN THIS SPECIMEN* Vesicles - Percent: 0 NONE SEEN* Leg : 64 Top/Bottom Interval(mm): 1410/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 599.00 Rock Type: IGNEOUS Core: 48 Sample Midpoint(m) : 601.91 Sect/Pc #: 2/PCE 13C ROCK = PLAG MODERATELY PHYRIC BASALT SMALL SLIDE SAMPLE; Texture: MODERATELY PORPHYRITIC,SUBSPHERULITIC; Where sampled: NEXT TO GLASSY MARGIN* Phenocrysts- PLAGIOCLASE ( 10%) Size(mm): 0.2-1.5 Morphology: LATH-LIKE QUENCH OVERGROWTHS DEVELOPING; OLIVINE ( 0%) NOTE ABSENCE OF OL PHENOS* Groundmass - MICROCRYST GROUNDMASS ( 80%) INCLUDES PLAG + CPX + MAGN + MESOSTASIS,TOO FINE TO BE DISTINGUISHED* Alteration - ZEOLITE ( 10%) Location: VEIN, Location: VESICLES Vesicles - Size(mm): 0.5 Percent: <1 Location: RANDOM Filling: ZEOLITE Shape: SPHERICAL RARE* Leg : 64 Top/Bottom Interval(mm): 140/ 0 Describer: Fornari, D. Hole: 474A Top of Core Depth(m) : 608.00 Rock Type: IGNEOUS Core: 49 Sample Midpoint(m) : 609.64 Sect/Pc #: 2/PCE 3 ROCK = PLAG-CPX PHYRIC BASALT; Texture: PORPHYRITIC,HYALOPILITIC; Where sampled: FLOW INTERIOR BASE OF A PILLOW SEQUENCE* Phenocrysts- OLIVINE ( 2%) Size(mm): 0.25-0.5 Morphology: EUHEDRAL-SUBHEDRAL ALTERED TO BOWLINGITE,MICROPHENOS; PLAGIOCLASE ( 30%) Size(mm): 2-4 MEGACRYSTS,COMMONLY NORMALLY ZONED,INCLUSIONS OF CUBIC BLEBS OF GLASS; CLINOPYROXENE ( 5%) Size(mm): 0.5-1 Morphology: EUHEDRAL-SUBHEDRAL APPROX COMP AUGITE,PSEUDOMORPHED BY ALTERATION MINS* Groundmass - PLAGIOCLASE ( 20%) CLINOPYROXENE ( 5%) OPAQUE MINERALS ( 4%) INCLUDES MAGN + ILMENITE; GLASS ( 30%) Alteration - CLAY MINERALS Location: VESICLES ZEOLITE Location: VESICLES BOWLINGITE Replacing: OL Vesicles - Size(mm): 0.5-0.75 Percent: <1 Filling: CLAY.MIN, Shape: ROUND Filling: ZEOLITES Leg : 64 Top/Bottom Interval(mm): 300/ 0 Describer: Fornari, D. Hole: 474A Top of Core Depth(m) : 608.00 Rock Type: IGNEOUS Core: 49 Sample Midpoint(m) : 609.80 Sect/Pc #: 2/PCE 4 ROCK = PLAG PHYRIC BASALT PILLOW BASALT; Texture: PORPHYRITIC,PILOTAXITIC; Where sampled: GLASSY MARGIN + NEXT TO GLASSY MARGIN* Phenocrysts- PLAGIOCLASE ( 30%) Size(mm): 0.5-4 Morphology: LATHS LATHS AND MEGACRYSTS,MANY NORMALLY ZONED* Groundmass - PLAGIOCLASE ( 20%) Size(mm): 0.25-0.5 Morphology: LATH MICROLITES + TINY LATHS; GLASS ( 50%) SOME ALTERED TO PALAGONITE,SIDEROMELANE* Alteration - PALAGONITE Replacing: GLASS SOME GLASS ALTERED TO PALAG/SIDEROMELANE* Leg : 64 Top/Bottom Interval(mm): 470/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 617.00 Rock Type: IGNEOUS Core: 50 Sample Midpoint(m) : 617.47 Sect/Pc #: 1/PCE 3 ROCK = PLAG MODERATELY PHYRIC BASALT; Texture: MODERATELY PORPHYRITIC,FINE-GRAINED,VARIOLITIC; Where sampled: FLOW INTERIOR ADJACENT TO VEINED AND SHEARED AREA* Phenocrysts- PLAGIOCLASE ( 10%) Size(mm): TO 5 Morphology: TABULAR,ROUNDED,LATH-SHAPED LARGE TABULAR ROUNDED MEGACRYSTS AND SMALLER LATH-SHAPED PHENOS* Groundmass - MICROCRYST GROUNDMASS INCLUDES OL + PLAG + CPX + MAGN + ILMENITE,VERY FINE-GRAINED QUENCHED GROUNDMASS COMPRISING PLAG MICROLITES + WHEATSHEAF PYX + ORE* Leg : 64 Top/Bottom Interval(mm): 620/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 617.00 Rock Type: IGNEOUS Core: 50 Sample Midpoint(m) : 619.12 Sect/Pc #: 2/PCE 5E ROCK = PLAG PHYRIC BASALT; Texture: PORPHYRITIC,VARIOLITIC; Where sampled: OTHER ADJACENT TO VEIN* Phenocrysts- OLIVINE ( 5%) Size(mm): <0.5 Morphology: ANHEDRAL MICROPHENOS,MAY PARTIALLY BE GROUNDMASS OL; PLAGIOCLASE ( 10%) Size(mm): 0.5-2 Morphology: LATH-SHAPED,ROUND,TABULAR LATH-SHAPED AND LARGE ROUNDED TABULAR MEGACRYSTS* Groundmass - OLIVINE SEE PHENOCRYSTS CODES; PLAGIOCLASE ( 30%) Size(mm): 0.1-0.5 Morphology: LATHS MICROLITES; MICROCRYST GROUNDMASS INCLUDES CPX + MAGN + ILMENITE,FINE-GRAINED GROUNDMASS* Alteration - CARBONATE ( 1-2%) Location: VESICLES CLAY MINERALS ( 5%) Location: MESOSTASIS, Location: VESICLES ZEOLITE ( 5%) Location: VEIN Vesicles - Size(mm): 1 Percent: 5 Location: RANDOM Filling: CLAY.MIN, Shape: SPHERICAL Filling: CALCITE Leg : 64 Top/Bottom Interval(mm): 720/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 617.00 Rock Type: IGNEOUS Core: 50 Sample Midpoint(m) : 619.22 Sect/Pc #: 2/PCE 7A ROCK = PLAG MODERATELY PHYRIC BASALT; Texture: MODERATELY PORPHYRITIC,VARIOLITIC; Where sampled: FLOW INTERIOR* Phenocrysts- PLAGIOCLASE ( 8%) Size(mm): 0.5-1.3 Morphology: TABULAR,LATH-LIKE,EQUANT HEAVILY RESORBED* Groundmass - OLIVINE ( 5%) Size(mm): <0.5 Morphology: ANHEDRAL,SKELETAL PERCENTAGE QUESTIONABLE,GROUNDMASS OR MICROPHENOS?; PLAGIOCLASE ( 50%) Size(mm): <1.0 Morphology: LATH-LIKE MICROCRYST GROUNDMASS ( 30%) INCLUDES CPX + MAGN + ILMENITE,VERY FINE-GRAINED, PERCENTAGE APPROXIMATE* Alteration - CLAY MINERALS ( 5%) Location: GROUNDMASS, Location: VESICLES LOCATED THROUGHOUT GROUNDMASS* Vesicles - Size(mm): 0.3-1.0 Percent: 10 Location: RANDOM Filling: CLAY.MIN Shape: SPHERICAL Leg : 64 Top/Bottom Interval(mm): 1460/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 617.00 Rock Type: IGNEOUS Core: 50 Sample Midpoint(m) : 621.46 Sect/Pc #: 3/PCE 12 ROCK = PLAG MODERATELY PHYRIC DOLERITE OR COARSE BASALT; Texture: MODERATELY PORPHYRITIC,INTERGRANULAR-SUBOPHITIC; Where sampled: FLOW INTERIOR OR SILL INTERIOR* Phenocrysts- OLIVINE SEE ALTERATION CODES; PLAGIOCLASE ( 5%) Size(mm): 0.5-2 Morphology: TABULAR,LATH-LIKE Groundmass - OLIVINE SEE ALTERATION CODES,SUBOPHITICALLY INTERGROWN WITH PLAG + CPX; PLAGIOCLASE ( 40%) Size(mm): 0.2-1 Morphology: LATH-LIKE SUBOPHITICALLY INTERGROWN WITH OL + CPX; CLINOPYROXENE ( 30%) Size(mm): 0.2-1.5 Morphology: ANHEDRAL APPROX COMP AUGITE,SUBOPHITICALLY INTERGROWN WITH OL + PLAG; MAGNETITE ( 5%) ILMENITE ( 2%) Alteration - BOWLINGITE ( 20%) Replacing: OL PHENOS,OL Replacing: GROUNDMASS PSEUDOMORPHS,REPLACES BOTH OL PHENOS + GROUNDMASS OL* Leg : 64 Top/Bottom Interval(mm): 160/ 0 Describer: Saunders, A. Hole: 474A Top of Core Depth(m) : 617.00 Rock Type: IGNEOUS Core: 50 Sample Midpoint(m) : 621.66 Sect/Pc #: 4/PCE 1C ROCK = PLAG MODERATELY PHYRIC DOLERITE OR COARSE BASALT; Texture: MODERATELY PORPHYRITIC,INTERGRANULAR-SUBOPHITIC; Where sampled: FLOW INTERIOR OR SILL INTERIOR* Phenocrysts- OLIVINE SEE ALTERATION CODES; PLAGIOCLASE ( 5%) Size(mm): 0.5-2 Morphology: TABULAR,LATH-LIKE Groundmass - OLIVINE SEE ALTERATION CODES; PLAGIOCLASE ( 40%) Size(mm): 0.2-1 Morphology: LATH-LIKE PARTIALLY ENCLOSED IN CPX; CLINOPYROXENE ( 30%) APPROX COMP AUGITE,PARTIALLY ENCLOSED IN PLAG; MAGNETITE ( 5%) Size(mm): 0.1-0.5 Morphology: CUBIC,ANHEDRAL INTERGRANULAR; ILMENITE ( 2%) Morphology: ELONGATE PERCENTAGE QUESTIONABLE* Alteration - BOWLINGITE ( 20%) Replacing: OL PHENOS,OL Replacing: GROUNDMASS PSEUDOMORPHS,REPLACES BOTH OL PHENOS + GROUNDMASS OL* |
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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