Leg : 61 Top/Bottom Interval(mm): 40/ 70 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 563.00 Rock Type: IGNEOUS Core: 14 Sample Midpoint(m) : 564.56 Sect/Pc #: 2/PCE 1 ROCK = APHYRIC TO MODERATELY MICROPHYRIC BASALT SHARP CONTACT BETWEEN APHYRIC BASALT AND MODERATELY MICROPHYRIC BASALT,ROCK IS 80% ALTERED; Texture: APHYRIC-MODERATELY MICROPHYRIC,INTERSERTAL; Where sampled: CHILLED SILL MARGIN TOP MARGIN OF SILL* Phenocrysts- OLIVINE ( 0%) IN MODERATELY MICROPHYRIC PART; OLIVINE ( 0%) Size(mm): .05X0.6 IN APHYRIC PART; PLAGIOCLASE ( 2.6%) Morphology: ELONGATE PRISMS MICROPHENOS IN MODERATELY MICROPHYRIC PART, AVERAGE DIMENSIONS = 0.05 X 0.6 MM,APPROX COMP AN65-45 (QUESTIONABLE),THIN MARGIN ENVELOPES ARE MORE ACIDIC; PLAGIOCLASE ( TR%) Size(mm): 0.05X0.6 Morphology: ELONGATE PRISMS MICROPHENOS IN APHYRIC PART,AVERAGE DIMENSIONS = 0.05 X 0.6 MM,APPROX COMP AN65-45 (QUESTIONABLE), THIN MARGINAL ENVELOPES ARE MORE ACIDIC; CLINOPYROXENE ( 2%) Size(mm): 0.5 Morphology: EQUIDIMENSIONAL MICROPHENOS IN MODERATELY MICROPHYRIC PART,0.5 MM ACROSS; CLINOPYROXENE ( TR%) Size(mm): 0.5 Morphology: EQUIDIMENSIONAL MICROPHENOS IN APHYRIC PART,0.5 MM ACROSS; MAGNETITE ( 0.4%) Size(mm): 0.6 MICROPHENOS IN MODERATELY MICROPHYRIC PART,0.6 MM ACROSS,DEEPLY ALTERED TO DARK BROWN OXIDES; MAGNETITE ( 0%) Size(mm): 0.6 IN APHYRIC PART* Groundmass - OLIVINE ( 0%) PLAGIOCLASE ALTERED MICROLITES,APPROX COMP AN32-65; CLINOPYROXENE Morphology: EQUIDIMENSIONAL ALTERED; MAGNETITE ( 10%) Size(mm): <0.04 Morphology: DUST-LIKE ALTERED PARTLY TO HYDROXIDES; GLASS ( >70%) ALTERED* Alteration - CARBONATE Location: VEIN INTERIOR COLLOFORM AGGREGATES; CLAY MINERALS Location: VEIN MARGINS, Replacing: GLASS,GROUNDMASS Location: GROUNDMASS BRIGHT GREEN IN VEINS AND PALE GREEN IN GROUNDMASS; PYRITE Location: VEIN MARGINS ALTERED TO HYDROXIDES; OTHER MAGN DEEPLY ALTERED TO DARK BROWN HYDROXIDES; HYDROXIDE Vesicles - Percent: 0 Leg : 61 Top/Bottom Interval(mm): 290/ 320 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 563.00 Rock Type: IGNEOUS Core: 14 Sample Midpoint(m) : 564.81 Sect/Pc #: 2/PCE 3A ROCK = APHYRIC BASALT ALTERED; Texture: APHYRIC,INTERGRANULAR-DIABASIC; Where sampled: INTERIOR OF SILL* Phenocrysts- PLAGIOCLASE Size(mm): 0.8-1.0 Morphology: LATHS HEAVILY ALTERED* Groundmass - PLAGIOCLASE ( 27%) Size(mm): 0.1-0.5 APPROX COMP AN80 ZONED TO AN38,HEAVILY ALTERED; CLINOPYROXENE ( 25%) Size(mm): 0.1-0.4 Morphology: SUBHEDRAL-EUHEDRAL AUGITE,2VZ= 40; MAGNETITE ( 10%) Size(mm): 0.004-0.08 Morphology: EUHEDRAL TI-MAGN,COLORLESS; GLASS ( 0%) QUARTZ ( <1%) Size(mm): 0.1 Morphology: ANHEDRAL WITH APATITE INCLUSIONS* Alteration - CLAY MINERALS ( 3%) BROWN; CHLORITE ( 35%) Replacing: PLAG,CPX Leg : 61 Top/Bottom Interval(mm): 440/ 480 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 566.50 Rock Type: IGNEOUS Core: 15 Sample Midpoint(m) : 566.96 Sect/Pc #: 1/PCE 2A ROCK = APHYRIC BASALT HIGHLY ALTERED,ALTERATION VEIN PRESENT,TOTAL ALTERATION PRODUCTS= 35%; Texture: APHYRIC,INTERGRANULAR-DIABASIC; Where sampled: SILL INTERIOR* Groundmass - OLIVINE ( 0%) PLAGIOCLASE ( 30%) Size(mm): 0.1-0.3 APPROX COMP AN50 ZONED TO ?; CLINOPYROXENE ( 20%) Size(mm): 0.1-0.4 Morphology: SUBHEDRAL CLEAR AND HEAVILY REPLACED (AMOST TOTALLY) BY GREEN CLAY AND CHLORITE (IN THAT ORDER); MAGNETITE ( 15%) OTHER ( 35%) ALTERATION PRODUCTS* Alteration - COMBINATION ( 35%) Location: VEINS Replacing: PYX INCLUDES CARB + CLAY MINS (BROWN AND GREEN--GREEN CLAY REPLACES PYX) + ZEOLITES + CHLORITE (REPLACES PYX AFTER GREEN CLAY) + FE AND MN OXIDES + HYDROXIDES CARBONATE Location: VEINS CLAY MINERALS Location: VEINS ZEOLITE Location: VEINS FERROUS OXIDE Location: VEINS MANGANESE OXIDE Location: VEINS HYDROXIDE Location: VEINS Leg : 61 Top/Bottom Interval(mm): 1170/1200 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 566.50 Rock Type: IGNEOUS Core: 15 Sample Midpoint(m) : 567.69 Sect/Pc #: 1/PCE 2G ROCK = APHYRIC BASALT ALTERED; Texture: APHYRIC,DIABASIC; Where sampled: SILL INTERIOR* Groundmass - PLAGIOCLASE ( 20%) Size(mm): 0.1-0.5 APPROX COMP AN70 TO AN50; CLINOPYROXENE ( 45%) Size(mm): 0.1-0.4 Morphology: SUBHEDRAL AUGITE,LIGHT GREENISH BROWN IN COLOR; MAGNETITE ( 10%) Size(mm): 0.05-0.2 TI-MAGN,DOES NOT INCLUDE THE DUST-LIKE MAGN FOUND WITH CLAY + ZEOLITES IN ALTERED ZONES* Alteration - COMBINATION ( 25%) Replacing: CPX INCLUDES CLAY MINS (GREEN AND BROWN) + ZEOLITES (FIBROUS WITH LOW RELIEF) + MAGN DUST; CLAY MINERALS ZEOLITE Leg : 61 Top/Bottom Interval(mm): 60/ 90 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 566.50 Rock Type: IGNEOUS Core: 15 Sample Midpoint(m) : 568.08 Sect/Pc #: 2/PCE 1 ROCK = APHYRIC BASALT ALTERED; Texture: APHYRIC,DIABASIC; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( TR%) Size(mm): 0.3-0.5 Morphology: ANHEDRAL STRANGELY ZONED,APPROX COMP AN80* Groundmass - PLAGIOCLASE ( 20%) Size(mm): 0.1-0.4 APPROX COMP AN77 ZONED TO AN36; CLINOPYROXENE ( 70%) Size(mm): 0.1-0.5 AUGITE,2VZ= 55,HALF OF CPX ALTERED TO GREEN CLAY; MAGNETITE ( 10%) Size(mm): 0.005-0.2 TI-MAGN,ALSO FINE GRAINED MAGN ASSOCIATED WITH GREEN CLAY* Alteration - CLAY MINERALS ( 35%) Replacing: CPX GREEN; CALCITE ( <1%) Location: GROUNDMASS Replacing: PLAG,CPX COMBINATION Location: VEIN INCLUDES 1)CALCITE + PYRITE 2)CALCITE 3)BROWN CLAY 4)CHALCEDONY 5)QUARTZ AND 6)SECOND GENERATION OF CALCITE* Leg : 61 Top/Bottom Interval(mm): 970/1010 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 572.00 Rock Type: IGNEOUS Core: 16 Sample Midpoint(m) : 572.99 Sect/Pc #: 1/PCE 1H ROCK = APHYRIC BASALT ALTERED; Texture: APHYRIC,DIABASIC; Where sampled: SILL INTERIOR* Phenocrysts- OLIVINE IDENTITY AND/OR PERCENTAGE QUESTIONABLE; PLAGIOCLASE ( <1%) Size(mm): 0.3-0.6 Morphology: SUBHEDRAL STRONGLY ZONED* Groundmass - PLAGIOCLASE ( 25%) Size(mm): 0.2-0.7 APPROX COMP AN75,NOT STRONGLY ZONED; CLINOPYROXENE ( 56%) Size(mm): 0.1-0.6 Morphology: SUBHEDRAL AUGITE,LIGHT BROWN; MAGNETITE ( 7%) Size(mm): 0.002-0.3 TI-MAGN* Alteration - CARBONATE ( 2%) PATCHY WHOLESALE REPLACEMENT OF ROCK; CLAY MINERALS ( 10%) GREEN,PATCHY WHOLESALE REPLACEMENT OF ROCK; COMBINATION Location: VEIN VEIN CONTAINS PYRITE + CA + CHALCEDONY + CLAY + QUARTZ* Leg : 61 Top/Bottom Interval(mm): 1160/1190 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 572.00 Rock Type: IGNEOUS Core: 16 Sample Midpoint(m) : 573.17 Sect/Pc #: 1/PCE 1H ROCK = APHYRIC BASALT VEIN IN HIGHLY ALTERED BASALT,BASALT IS SIMILAR TO PREVIOUS CORES,PERVASIVELY ALTERED TO GREEN CLAY + BROWN CLAY + MINOR CHLORITE; Texture: APHYRIC; Where sampled: VEIN FROM SILL INTERIOR* Alteration - CALCITE CHLORITE CHALCEDONY PYRITE CLAY MINERALS BRIGHT YELLOW-GREEN + GREEN + BROWN CLAY,DOMINANT ALTERATION (PERVASIVE)* Leg : 61 Top/Bottom Interval(mm): 1370/1400 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 572.00 Rock Type: IGNEOUS Core: 16 Sample Midpoint(m) : 573.39 Sect/Pc #: 1/PCE 1I ROCK = BASALT VEIN; Where sampled: VEIN IN ALTERED BASALT* Alteration - QUARTZ Location: VEIN CALCITE Location: VEIN FIRST + SECOND GENERATIONS; PYRITE Location: VEIN CLAY Location: VEIN GREEN + BROWN; CHALCEDONY Location: VEIN ZEOLITE Location: VEIN PRESENCE QUESTIONABLE; FERROUS OXIDE Location: VEIN FERROUS HYDROX MINS Location: VEIN MANGANESE OXIDE Location: VEIN MANGANESE HYDROXIDE Location: VEIN Leg : 61 Top/Bottom Interval(mm): 980/1000 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 574.00 Rock Type: IGNEOUS Core: 17 Sample Midpoint(m) : 574.99 Sect/Pc #: 1/PCE 1E ROCK = DOLERITE; Texture: SUBOPHITIC; Where sampled: INTERIOR OF SILL* Phenocrysts- PLAGIOCLASE ( 2%) Size(mm): 0.4-0.5 Morphology: ACICULAR-PRISMATIC MICROPHENOS* Groundmass - PLAGIOCLASE ( 47%) Size(mm): <0.2 Morphology: SUBHEDRAL APPROX COMP AN70-58,MICROLITIC TO GROUNDMASS; CLINOPYROXENE ( 46%) Size(mm): <0.2 Morphology: SUBHEDRAL MICROLITIC TO GROUNDMASS; MAGNETITE ( 5%) Size(mm): <0.05 Morphology: PRISMATIC OBSERVED MORE FREQUENTLY IN ALTERED PART* Alteration - CLAY MINERALS ( 25%) Location: SPOTS, Replacing: CPX Location: MESOSTASIS Leg : 61 Top/Bottom Interval(mm): 360/ 380 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 574.00 Rock Type: IGNEOUS Core: 17 Sample Midpoint(m) : 575.87 Sect/Pc #: 2/PCE 2B ROCK = DOLERITE; Texture: SUBOPHITIC; Where sampled: INTERIOR OF SILL* Phenocrysts- PLAGIOCLASE ( 3%) Size(mm): 0.5-1.0 Morphology: PRISMATIC APPROX COMP AN55-60,MICROPHENOS TO PHENOS; CLINOPYROXENE ( 1%) Size(mm): 0.5 ASSOCIATES WITH PLAG LATHS,MICROPHENOS TO PHENOS* Groundmass - PLAGIOCLASE ( 45%) Size(mm): <0.2 Morphology: SUBHEDRAL-EUHEDRAL MICROLITIC TO GROUNDMASS,OFTEN IN SPHERULITIC AGGREGATES WITH CPX; CLINOPYROXENE ( 46%) Size(mm): <0.2 Morphology: SUBHEDRAL MICROLITIC TO GROUNDMASS,OFTEN IN SPHERULITIC AGGREGATES WITH PLAG; MAGNETITE ( 5%) Size(mm): <0.05 Morphology: PRISMATIC MICROLITIC TO GROUNDMASS,MAGN IS OBSERVED MORE FREQUENTLY IN ALTERED PART* Alteration - CLAY MINERALS ( 30%) Location: SPOTS, Replacing: CPX Location: MESOSTASIS Leg : 61 Top/Bottom Interval(mm): 1280/1300 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 576.00 Rock Type: IGNEOUS Core: 18 Sample Midpoint(m) : 577.29 Sect/Pc #: 1/PCE 5C ROCK = PLAG-CPX PHYRIC DOLERITE; Texture: PORPHYRITIC,SUBOPHITIC; Where sampled: INTERIOR OF SILL* Phenocrysts- PLAGIOCLASE ( 7%) Size(mm): 0.4-0.7 Morphology: SUBHEDRAL-EUHEDRAL APPROX COMP AN60,MICROPHENOS TO PHENOS; CLINOPYROXENE ( 7%) Size(mm): 0.4-0.8 Morphology: SUBHEDRAL-EUHEDRAL MICROPHENOS TO PHENOS* Groundmass - PLAGIOCLASE ( 40%) Size(mm): <0.4 Morphology: PARTLY SPHERULITIC MICROLITIC TO GROUNDMASS; CLINOPYROXENE ( 40%) Size(mm): <0.4 Morphology: PRISMATIC MICROLITIC TO GROUNDMASS; MAGNETITE ( 6%) Size(mm): <0.05 Morphology: PARTLY DUST-LIKE MAGN IS OBSERVED MORE FREQUENTLY IN ALTERED AREA, MICROLITIC TO GROUNDMASS* Alteration - CLAY MINERALS ( 25%) Location: SPOTS Replacing: CPX PHENOS,PLAG CPX PHENOS AND PLAG IN THE MESOSTASIS ARE ALTERED* Leg : 61 Top/Bottom Interval(mm): 480/ 500 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 576.00 Rock Type: IGNEOUS Core: 18 Sample Midpoint(m) : 577.99 Sect/Pc #: 2/PCE 2B ROCK = DOLERITE; Texture: SUBOPHITIC; Where sampled: INTERIOR OF SILL* Phenocrysts- PLAGIOCLASE ( 7%) Size(mm): 0.4-0.9 Morphology: LATHS APPROX COMP AN55,SOME LARGE PLATES OF CPX ENCLOSING LATHS OF PLAG (OPHITIC TEXTURE), MICROPHENOS TO PHENOS; CLINOPYROXENE ( 8%) Size(mm): 0.4-1 Morphology: PLATES SOME LARGE PLATES OF CPX ENCLOSING LATHS OF PLAG (OPHITIC TEXTURE),MICROPHENOS TO PHENOS* Groundmass - PLAGIOCLASE ( 40%) Size(mm): 0.1-0.4 Morphology: SUBHEDRAL-EUHEDRAL MICROLITIC; CLINOPYROXENE ( 39%) Size(mm): 0.1-0.4 Morphology: SUBHEDRAL-EUHEDRAL MICROLITIC; MAGNETITE ( 6%) Size(mm): <0.1 Morphology: PARTLY DUST-LIKE MICROLITIC; QUARTZ ( TR%) ALKALI FELDSPAR ( TR%) Alteration - CLAY MINERALS ( 30%) Location: SPOTS Replacing: CPX,PLAG,CPX PHENOS PHENOS OF CPX AND MICROLITES OF PLAG + CPX ARE ALTERED* Leg : 61 Top/Bottom Interval(mm): 100/ 120 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 578.00 Rock Type: IGNEOUS Core: 19 Sample Midpoint(m) : 578.11 Sect/Pc #: 1/PCE 1 ROCK = MICRODOLORITE; Texture: MICRODOLERITIC; Where sampled: SILL INTERIOR* Phenocrysts- OLIVINE Size(mm): 0.2-0.4 Morphology: EUHEDRAL PCT. UNCERTAIN,SMEC PSEUDOMORPHS,MICROPHENOS; PLAGIOCLASE ( 1%) Morphology: ELONGATE PRISMS,TABULAR MICROPHENOS,DIMENSIONS ARE 0.08-0.1 X 0.3-1.6 MM, APPROX COMP AN42-90,MARGINS ARE MORE ACIDIC; CLINOPYROXENE ( TR%) Groundmass - PLAGIOCLASE ( 55%) DIMENSIONS ARE 0.02-0.12 X 0.2-0.6 MM,APPROX COMP AN60-80,MICROLITIC; CLINOPYROXENE ( 36%) Size(mm): 0.08-0.6 Morphology: EQUIDIMENSIONAL MAGNETITE ( 8%) Size(mm): 0.06-0.2 Morphology: INTERGRANULAR GLASS ( 15%) PERCENTAGE QUESTIONABLE,ALTERED TO DARKLY BROWN CLAY* Alteration - CLAY MINERALS ( 15%) Replacing: OL,PYX,GLASS ISOLATED PSEUDOMORPHS,OL REPLACED BY SMECTITE PSEUDOMORPHS,GLASS ALTERED TO DARK BROWN CLAY* Leg : 61 Top/Bottom Interval(mm): 490/ 510 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 578.00 Rock Type: IGNEOUS Core: 19 Sample Midpoint(m) : 578.50 Sect/Pc #: 1/PCE 2 ROCK = MICRODOLERITE; Texture: MICRODOLORITIC-INTERSERTAL; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 1%) Size(mm): 0.8X1.5 Morphology: TABULAR APPROX COMP AN62-45,ZONED,DIMENSIONS ARE 0.8 X 1.5 MM; CLINOPYROXENE ( TR%) Size(mm): 0.6X0.8 DIMENSIONS ARE 0.6 X 0.8 MM* Groundmass - PLAGIOCLASE ( 31%) Morphology: PRISMS,MICROLITIC MICROLITIC; CLINOPYROXENE ( 45%) Morphology: ANHEDRAL MAGNETITE ( 8%) Morphology: INTERGRANULAR GLASS ( 15%) INTERSTITIAL,ALTERED TO DARK-BROWN CLAY* Alteration - SPHENE ( TR%) Location: VEINS IN LEUCOXENE AGGREGATES NEAR AND WITHIN VEINS, HYDROTHERMAL VEIN FILLING; CARBONATE ( <1%) SMALL RELICTS IN CLAY,HYDROTHERMAL VEIN FILLING; CLAY MINERALS ( 9%) Location: VEIN INTERIOR Replacing: GLASS HYDROTHERMAL VEIN FILLING,GLASS ALTERED TO DARK BROWN CLAY; ZEOLITE ( 3%) Location: VEINS INTERIOR OF VEINS AND LATER VEINS,HYDROTHERMAL VEIN FILLING; MUSCOVITE ( 2%) Location: VEIN MARGINS Replacing: CLAY.MIN,PYX MUSCOVITE OR PARAGONITE,REPLACING CLAY + FIBROUS RADIAL AGGREGATES OF PYX,HYDROTHERMAL VEIN FILLING* Leg : 61 Top/Bottom Interval(mm): 580/ 600 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 578.00 Rock Type: IGNEOUS Core: 19 Sample Midpoint(m) : 580.09 Sect/Pc #: 2/PCE 2 ROCK = APHYRIC BASALT ALTERED,ALL.MINS AND GLASS ARE A PALE GRAYISH GREEN COLOR; Texture: APHYRIC,MICRODOLORITIC-INTERSERTAL; Where sampled: SILL BOTTOM* Phenocrysts- PLAGIOCLASE ( TR%) MICROPHENOS* Groundmass - PLAGIOCLASE HEAVILY ALTERED; CLINOPYROXENE HEAVILY ALTERED; MAGNETITE ( 12%) GLASS PERCENTAGE UNCERTAIN,ALTERED* Alteration - CLAY MINERALS ( 60%) Replacing: ALL.MINS,GLASS PALE GRAYISH-GREEN COLOR* Vesicles - Percent: 0 Leg : 61 Top/Bottom Interval(mm): 910/ 930 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 578.00 Rock Type: IGNEOUS Core: 19 Sample Midpoint(m) : 580.42 Sect/Pc #: 2/PCE 2 ROCK = CPX-PLAG MODERATELY MICROPHYRIC BASALT ALTERED; Texture: MODERATELY MICROPHYRIC,HYALOPILITIC-VARIOLITIC; Where sampled: SILL TOP* Phenocrysts- OLIVINE ( 0%) PLAGIOCLASE ( TR%) CLINOPYROXENE ( 2%) Size(mm): 0.2-1.0 Morphology: EUHEDRAL Groundmass - PLAGIOCLASE ( 15%) Size(mm): <0.02 Morphology: LATHS,NEEDLES CLINOPYROXENE ( 2%) Size(mm): <0.02 Morphology: EQUIDIMENSIONAL MAGNETITE ( 8%) Size(mm): <0.02 Morphology: DUST-LIKE GLASS ( 73%) MESOSTASIS DEEPLY ALTERED* Alteration - CLAY MINERALS ( 80%) Replacing: ALL.MINS,GLASS Leg : 61 Top/Bottom Interval(mm): 1130/1160 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 578.00 Rock Type: IGNEOUS Core: 19 Sample Midpoint(m) : 580.65 Sect/Pc #: 2/PCE 2 ROCK = CPX-PLAG MODERATELY PHYRIC BASALT; Texture: MODERATELY PORPHYRITIC,INTERSERTAL; Where sampled: NEXT TO GLASSY MARGIN OF SILL* Phenocrysts- PLAGIOCLASE ( TR%) Size(mm): 0.1X1.2 Morphology: ELONGATE PRISMS DIMENSIONS ARE 0.1 X 1.2 MM; CLINOPYROXENE ( 2%) Size(mm): 0.2-1.0 Morphology: EQUIDIMENSIONAL Groundmass - PLAGIOCLASE ( 20%) Size(mm): <0.04 Morphology: LATHS CLINOPYROXENE ( 2%) Size(mm): 0.04 Morphology: IRREGULAR MAGNETITE ( 8%) Size(mm): <0.02 Morphology: DUST-LIKE GLASS ( 68%) OPAQUE MESOSTASIS* Alteration - CLAY MINERALS ( 70%) Location: MESOSTASIS Replacing: GLASS Leg : 61 Top/Bottom Interval(mm): 720/ 740 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 581.00 Rock Type: IGNEOUS Core: 20 Sample Midpoint(m) : 581.73 Sect/Pc #: 1/PCE 2E ROCK = CPX SPARSELY PHYRIC BASALT; Texture: SPARSELY PORPHYRITIC,INTERSERTAL-VARIOLITIC; Where sampled: NEXT TO GLASSY MARGIN OF SILL* Phenocrysts- CLINOPYROXENE ( 2%) Size(mm): 0.5-1.2 Morphology: EQUIDIMENSIONAL Groundmass - PLAGIOCLASE Size(mm): <0.04 CLINOPYROXENE Size(mm): <0.02 SPOTS OF VARIOLITIC AGGREGATES ARE COMMON; MAGNETITE ( 7%) Morphology: DUST-LIKE,INTERGRANULAR SPOTS IN THE MESOSTASIS; GLASS ( 30%) SPOTS AND INTERSTITIAL* Alteration - CLAY MINERALS ( 30%) Location: MESOSTASIS, Replacing: ALL.MINS,GLASS Location: GLASS SPOTS Vesicles - Size(mm): 0.08 Percent: 2 Location: GROUNDMASS Filling: ZEOLITES Shape: ELONGATE, Shape: IRREGULAR VUGS,FILLING QUESTIONABLE,SURROUNDED BY VARIOLITIC AGGREGATES* Leg : 61 Top/Bottom Interval(mm): 1440/1460 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 581.00 Rock Type: IGNEOUS Core: 20 Sample Midpoint(m) : 582.45 Sect/Pc #: 1/PCE 4C ROCK = CPX-PLAG-OL MODERATELY PHYRIC BASALT; Texture: MODERATELY MICROPHYRIC,INTERSERTAL; Where sampled: SILL INTERIOR* Phenocrysts- OLIVINE PERCENTAGE UNKNOWN,PSEUDOMORPHS AFTER GREEN CLAY; PLAGIOCLASE ( 1%) Size(mm): 0.2-0.4 APPROX COMP AN60; CLINOPYROXENE ( 2%) Size(mm): 0.3-0.6 Morphology: EUHEDRAL AUGITE,TWINNED AND WITH INCLUSIONS* Groundmass - PLAGIOCLASE ( 25%) Size(mm): <0.2 Morphology: SKELETAL MICROLITE AND CRYSTALLITES,APPROX COMP AN55 USUALLY; CLINOPYROXENE ( 47%) Size(mm): <0.08 AUGITE,QUENCH TEXTURES,2VZ= 50; MAGNETITE ( 10%) Size(mm): <0.02 Morphology: ANHEDRAL-EUHEDRAL TI-MAGN* Alteration - CLAY MINERALS ( 15%) Replacing: CPX,GROUNDMASS GREEN + BROWN* Leg : 61 Top/Bottom Interval(mm): 930/ 950 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 581.00 Rock Type: IGNEOUS Core: 20 Sample Midpoint(m) : 583.44 Sect/Pc #: 2/PCE 3F ROCK = CPX MODERATELY MICROPHYRIC BASALT ALTERED; Texture: MODERATELY MICROPHYRIC,INTERGRANULAR-DIABASIC (SUBOPHITIC); Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( <<1%) Size(mm): 0.5 CLINOPYROXENE ( 3%) Size(mm): 0.3-0.5 AUGITE,MICROPHENOS* Groundmass - OLIVINE PRESENCE QUESTIONABLE; PLAGIOCLASE ( 25%) Size(mm): 0.2-0.5 Morphology: EUHEDRAL-SUBHEDRAL APPROX COMP AN60-AN50; CLINOPYROXENE ( 44%) Size(mm): 0.05-0.2 Morphology: SUBHEDRAL-EUHEDRAL AUGITE,LIGHT BROWN COLOR; MAGNETITE ( 10%) Size(mm): 0.005-0.2 TITANOMAGNETITE; GLASS ( 3%) REPLACED BY CLAY,INTERSTITIAL TRIANGULAR PATCHES* Alteration - CLAY MINERALS ( 10%) Replacing: CPX,GLASS MIXED WITH SECONDARY MAGN DUST,GREEN; ZEOLITE ( 5%) Replacing: CPX MIXED WITH SECONDARY MAGN DUST* Leg : 61 Top/Bottom Interval(mm): 160/ 200 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 586.00 Rock Type: IGNEOUS Core: 21 Sample Midpoint(m) : 586.18 Sect/Pc #: 1/PCE 1A ROCK = DOLERITE BADLY ALTERED; Texture: DIABASIC; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( TR%) Size(mm): 0.9-1.0 ONLY ONE PHENO IN SECTION; CLINOPYROXENE ( 2%) Size(mm): 0.4-0.8 AUGITE WITH OPHITIC PLAG* Groundmass - PLAGIOCLASE ( 21%) Size(mm): 0.2-0.4 Morphology: SUBOPHITIC APPROX COMP AN68; CLINOPYROXENE ( 45%) Size(mm): 0.1-0.6 Morphology: SUBHEDRAL AUGITE,LIGHT BROWN; MAGNETITE ( 5%) Size(mm): <0.1 Morphology: SUBHEDRAL-EUHEDRAL TI-MAGN; GLASS ( 2%) SMALL INTERSTITIAL PATCHES OF ALTERED GLASS, VARIOLITIC PATCHES WITH FRESH GLASS* Alteration - CLAY MINERALS ( 25%) LARGE PATCHES (2 MM),WHOLESALE REPLACEMENT OF ROCK* Leg : 61 Top/Bottom Interval(mm): 400/ 420 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 586.00 Rock Type: IGNEOUS Core: 21 Sample Midpoint(m) : 586.41 Sect/Pc #: 1/PCE 1A ROCK = DOLERITE BADLY ALTERED; Texture: DIABASIC; Where sampled: SILL INTERIOR* Phenocrysts- CLINOPYROXENE ( 1%) Size(mm): 0.4-1.0 Morphology: SUBHEDRAL AUGITE* Groundmass - PLAGIOCLASE ( 20%) Size(mm): 0.2-0.5 Morphology: SUBHEDRAL-EUHEDRAL APPROX COMP AN75-AN45; CLINOPYROXENE ( 36%) Size(mm): 0.1-0.3 AUGITE,LIGHT BROWN COLOR; MAGNETITE ( 5%) Size(mm): <0.05 TI-MAGN; GLASS ( 8%) INTERSTITIAL ALTERED GLASS PATCHES* Alteration - COMBINATION ( 30%) Location: VEINS,PATCHES LARGE PATCHES OF CLAY WITH MINOR (LATE) CHLORITE (ALSO IN VEINS); CLAY MINERALS Location: PATCHES,VEINS CHLORITE Location: PATCHES,VEINS Leg : 61 Top/Bottom Interval(mm): 930/ 960 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 586.00 Rock Type: IGNEOUS Core: 21 Sample Midpoint(m) : 586.95 Sect/Pc #: 1/PCE 1E ROCK = CPX-PLAG MODERATELY MICROPHYRIC BASALT ALTERED,GLASSY; Texture: MODERATELY MICROPHYRIC,VARIOLITIC; Where sampled: BOTTOM CHILL MARGIN OF SILL* Phenocrysts- PLAGIOCLASE ( 2%) Size(mm): <0.15 Morphology: EUHEDRAL MICROPHENOS,APPROX COMP AN78-65 (ZONED); CLINOPYROXENE ( 3%) Size(mm): 0.05-0.2 Morphology: EUHEDRAL MICROPHENOS,AUGITE* Groundmass - PLAGIOCLASE ( 5%) Size(mm): <0.03 SMALL MICROLITES AND CRYSTALLITES; CLINOPYROXENE ( 5%) Size(mm): <0.005 AUGITE?,QUENCH TEXTURED FORM; MAGNETITE ( 10%) Size(mm): <0.02 TI-MAGN; GLASS ( 75%) GLASSY GROUNDMASS MOSTLY REPLACED BY CLAY AND CHLORITE* Alteration - CLAY MINERALS Location: GROUNDMASS Replacing: GROUNDMASS,GLASS,CPX PERCENTAGE VARIABLE; CHLORITE Location: GROUNDMASS Replacing: GROUNDMASS,GLASS,CPX PCT. VARIABLE* Leg : 61 Top/Bottom Interval(mm): 1230/1250 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 586.00 Rock Type: IGNEOUS Core: 21 Sample Midpoint(m) : 587.24 Sect/Pc #: 1/PCE 1I ROCK = CPX-PLAG MODERATELY PHYRIC BASALT ALTERED; Texture: MODERATELY PORPHYRITIC,INTERSERTAL; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 1%) Size(mm): 0.3-0.5 APPROX COMP AN55-65 (OSCILLATORY ZONING); CLINOPYROXENE ( 2%) Size(mm): 0.5-1.0 AUGITE,SUBOPHITIC TEXTURE* Groundmass - PLAGIOCLASE ( 40%) Size(mm): 0.1-0.3 APPROX COMP AN60; CLINOPYROXENE ( 37%) Size(mm): <0.2 Morphology: SUBHEDRAL-ANHEDRAL AUGITE,LIGHT BROWN; MAGNETITE ( 5%) Size(mm): <0.05 Morphology: SUBHEDRAL TI-MAGN; GLASS ( 15%) ALTERED INTERSTITIAL GLASS PATCHES (ALTERED TO GREENISH BROWN CLAY)* Alteration - CLAY MINERALS ( 10%) Replacing: CPX,GLASS GREEN-GREENISH BROWN* Leg : 61 Top/Bottom Interval(mm): 1460/1490 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 586.00 Rock Type: IGNEOUS Core: 21 Sample Midpoint(m) : 587.48 Sect/Pc #: 1/PCE 1K ROCK = CPX MODERATELY MICROPHYRIC BASALT ALTERED,FINE GRAINED; Texture: MODERATELY MICROPHYRIC,HYALOPILITIC-INTERSERTAL; Where sampled: NEAR CHILL MARGIN OF SILL* Phenocrysts- PLAGIOCLASE ( TR%) Size(mm): 0.1 Morphology: SUBHEDRAL ONLY ONE XTL IN SECTION,MICROPHENOS CLINOPYROXENE ( 3%) Size(mm): 0.1-0.2 Morphology: EUHEDRAL-SUBHEDRAL AUGITE,MICROPHENOS* Groundmass - PLAGIOCLASE ( 39%) Size(mm): <0.03 Morphology: SKELETAL MICROLITES; CLINOPYROXENE ( 38%) Size(mm): <0.01 QUENCH XTLS AND SMALL MICROLITES; MAGNETITE ( 10%) Size(mm): <0.01 TI-MAGN; GLASS ALL GLASS APPEARS TO BE PLUCKED FROM SECTION (IF NOT FOR THIS GLASS WOULD PROBABLY COMPRISE 15% OF THE ROCK)* Alteration - COMBINATION ( 10%) Location: VEINS, Replacing: GROUNDMASS Location: GROUNDMASS CLAYS + CHLORITE; CLAY MINERALS CHLORITE Leg : 61 Top/Bottom Interval(mm): 80/ 90 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 586.00 Rock Type: IGNEOUS Core: 21 Sample Midpoint(m) : 587.59 Sect/Pc #: 2/PCE 1B ROCK = CPX-PLAG MODERATELY MICROPHYRIC BASALT ALTERED,GLASSY; Texture: MODERATELY MICROPHYRIC,VARIOLITIC-HYALOPILITIC; Where sampled: GLASSY MARGIN OF SILL* Phenocrysts- PLAGIOCLASE ( 1%) Size(mm): 0.1-0.2 Morphology: EUHEDRAL MICROPHENOS,APPROX COMP AN61,ONLY SLIGHTLY ZONED; CLINOPYROXENE ( 5%) Size(mm): 0.05-0.5 Morphology: EUHEDRAL MICROPHENOS,AUGITE* Groundmass - PLAGIOCLASE ( 10%) Size(mm): <0.03 MICROLITES AND CRYSTALLITES; CLINOPYROXENE ( 10%) Size(mm): <0.02 QUENCH XTLS AND MICROLITES; MAGNETITE ( 5%) Size(mm): <0.01 Morphology: EUHEDRAL TI-MAGN; GLASS ( 69%) ALMOST COMPLETELY REPLACED BY CLAY + CHLORITE* Alteration - COMBINATION Replacing: GLASS,PLAG PHENOS, Replacing: CPX PHENOS CLAYS + CHLORITE ARE REPLACING ALL GLASS AND SOME QUENCH PLAG + CPX PHENOS; CLAY MINERALS CHLORITE Leg : 61 Top/Bottom Interval(mm): 100/ 110 Describer: Riech, V. Hole: 462A Top of Core Depth(m) : 586.00 Rock Type: SEDIMENTARY Core: 21 Sample Midpoint(m) : 587.60 Sect/Pc #: 2/PCE 1D ROCK = SEDIMENT QUARTZIFIED RADIOLARIAN CLAYSTONE,THERE IS A HIGH AMOUNT OF REDDISH BROWN TRANSPARENT PIGMENT (ORIGIN AND NATURE?--IN CONTACT WITH GLASSY MARGIN OF A SILL--BAKED),QUARTZ OCCURS IN THE MATRIX + VEINS + RADIOLARIAN MOLDS (RADS ARE TOTALLY DISSOLVED BEFORE CHERTIFICATION),ACCESSORY COMPONENTS ARE FISH REMAINS AND A GREENISH CLAY MIN (CHLORITE?) WHICH SOMETIMES FORMS GREENISH INCLUSIONS AND IS CONCENTRATED AROUND FISH REMAINS; Where sampled: SEDIMENT BETWEEN TWO BASALT SILLS BETWEEN UNITS 3 + 4* Alteration - QUARTZ Location: MATRIX,VEINS, Location: RAD MOLDS RADS ARE TOTALLY DISSOLVED BEFORE CHERTIFICATION; CLAY MINERALS GREENISH (CHLORITE?),SOMETIMES FORMS GREENISH INCLUSIONS AND IS CONCENTRATED AROUND FISH REMAINS* Leg : 61 Top/Bottom Interval(mm): 260/ 290 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 586.00 Rock Type: IGNEOUS Core: 21 Sample Midpoint(m) : 587.78 Sect/Pc #: 2/PCE 2 ROCK = CPX-PLAG MODERATELY MICROPHYRIC BASALT GLASSY,ALTERED; Texture: MODERATELY MICROPHYRIC,HYALOPILITIC; Where sampled: NEAR CHILLED MARGIN OF LOWEST SILL IN CORE* Phenocrysts- PLAGIOCLASE ( 3%) Size(mm): 0.15-0.25 Morphology: EUHEDRAL APPROX COMP AN55-60; CLINOPYROXENE ( 4%) Size(mm): 0.2-0.5 Morphology: EUHEDRAL-SUBHEDRAL AUGITE,IN GLOMEROPHYRIC CLUSTERS WITH PLAG* Groundmass - PLAGIOCLASE ( 10%) <0.02 LONG,MICROLITES AND CRYSTALLITES; CLINOPYROXENE ( 50%) Size(mm): <0.003 QUENCH XTLS MOSTLY WITH SOME CRYSTALLITES; MAGNETITE ( 12%) Size(mm): <0.008 TI-MAGN; GLASS ( 21%) MOSTLY ALTERED TO CHLORITE + GREEN CLAY* Alteration - COMBINATION ( 30%) Location: GROUNDMASS Replacing: GROUNDMASS,GLASS,PLAG CLAYS (GREEN) + CHLORITE,REPLACING QUENCH XTLS AND GLASS; CLAY MINERALS (S %) CHLORITE Leg : 61 Top/Bottom Interval(mm): 100/ 120 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 588.00 Rock Type: IGNEOUS Core: 22 Sample Midpoint(m) : 588.11 Sect/Pc #: 1/PCE 2 ROCK = CPX-PLAG MODERATELY PHYRIC BASALT ALTERED; Texture: MODERATELY PORPHYRITIC,INTERSERTAL; Where sampled: MARGINAL PORTION OF SILL* Phenocrysts- PLAGIOCLASE ( 3%) Size(mm): 0.4-0.6 APPROX COMP AN63; CLINOPYROXENE ( 5%) Size(mm): 0.2-0.4 AUGITE* Groundmass - PLAGIOCLASE ( 27%) Size(mm): 0.1-0.2 APPROX COMP AN60 ZONED TO AN29; CLINOPYROXENE ( 20%) Size(mm): <0.2 AUGITE; MAGNETITE ( 10%) Size(mm): <0.04 GLASS ( 15%) INTERSTITIAL PATCHES TOTALLY REPLACED; AMPHIBOLE Alteration - COMBINATION ( 35%) GREEN CLAY + CHLORITE + SECONDARY AMPHIBOLE; CLAY MINERALS (S %) AMPHIBOLE CHLORITE Leg : 61 Top/Bottom Interval(mm): 350/ 370 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 588.00 Rock Type: IGNEOUS Core: 22 Sample Midpoint(m) : 588.36 Sect/Pc #: 1/PCE 4B ROCK = CPX-PLAG MODERATELY PHYRIC BASALT ALTERED; Texture: MODERATELY PORPHYRITIC,INTERSERTAL; Where sampled: NEXT TO GLASSY MARGIN OF SILL TOP TOP OF SILL* Phenocrysts- OLIVINE ( 0%) PLAGIOCLASE ( <1%) Morphology: TABULAR APPROX COMP AN58; CLINOPYROXENE ( 2%) AVERAGE SIZE = 0.8 MM* Groundmass - PLAGIOCLASE Morphology: LATHS FINE GRAINED MESOSTASIS; CLINOPYROXENE Morphology: EQUIDIMENSIONAL, Morphology: RADIALLY FIBROUS FINE GRAINED MESOSTASIS; MAGNETITE ( 12%) Morphology: DUST-LIKE GLASS ( 30%) MESOSTASIS AND PSEUDOMORPHS* Alteration - CARBONATE ( TR%) CLAY MINERALS ( 30%) Location: MESOSTASIS Replacing: GLASS,PYX PSEUDOMORPHS* Leg : 61 Top/Bottom Interval(mm): 1100/1120 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 588.00 Rock Type: IGNEOUS Core: 22 Sample Midpoint(m) : 589.11 Sect/Pc #: 1/PCE 4H ROCK = CPX MODERATELY PHYRIC BASALT ALTERED,MORE COARSE GRAINED THAN PREVIOUS THIN SECTION; Texture: MODERATELY PORPHYRITIC,INTERSERTAL- MICRODOLERITIC; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( TR%) Morphology: LATHS CLINOPYROXENE ( 3%) Morphology: EQUIDIMENSIONAL AVERAGE SIZE = 1.2 MM,INCLUDE PLAG LATHS WITHIN* Groundmass - PLAGIOCLASE ( 47%) AVERAGE DIMENSIONS = 0.02 X 0.6 MM,APPROX COMP AN60,MICROLITES; CLINOPYROXENE ( 20%) Morphology: EQUIDIMENSIONAL AVERAGE SIZE = 0.06 MM; MAGNETITE ( 10%) AVERAGE SIZE = 0.05,INTERSTITIAL; GLASS ( 20%) INTERSTITIAL,ALTERED TO DARK CLAY* Alteration - CLAY MINERALS ( 20%) Location: INTERSTITIAL Replacing: GLASS DARK IN COLOR* Leg : 61 Top/Bottom Interval(mm): 1380/1410 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 588.00 Rock Type: IGNEOUS Core: 22 Sample Midpoint(m) : 589.40 Sect/Pc #: 1/PCE 4I ROCK = APHYRIC BASALT HEAVILY ALTERED,MORE FINE GRAINED THAN PREVIOUS THIN SECTION; Texture: APHYRIC,INTERSERTAL; Where sampled: CHILLED MARGIN OF SILL BOTTOM OF SILL* Phenocrysts- CLINOPYROXENE ( TR%) Groundmass - PLAGIOCLASE PERCENT UNKNOWN,ALTERED; CLINOPYROXENE PERCENT UNKNOWN,ALTERED; MAGNETITE ( 7%) GLASS ALTERED* Alteration - CLAY MINERALS ( 85%) Location: ENTIRE ROCK Replacing: ALL.MINS,GLASS Leg : 61 Top/Bottom Interval(mm): 1120/1140 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 588.00 Rock Type: IGNEOUS Core: 22 Sample Midpoint(m) : 590.63 Sect/Pc #: 2/PCE 1 ROCK = APHYRIC BASALT ALTERED,CONTACT OF HYALOPILITIC AND INTERSERTAL BASALTS; Texture: APHYRIC,HYALOPILITIC,INTERSERTAL; Where sampled: GLASSY MARGIN OF SILL* Phenocrysts- COMBINATION ( TR%) Size(mm): 1.6 INCLUDES PLAG+CPX GLOMEROPORPHYRITIC INTERGROWTHS* Groundmass - PLAGIOCLASE HEAVILY ALTERED TO DARK GRAY CHLORITE + CLAY; CLINOPYROXENE HEAVILY ALTERED TO DARK GRAY CHLORITE + CLAY; MAGNETITE HEAVILY ALTERED TO DARK GRAY CHLORITE + CLAY; GLASS HEAVILY ALTERED TO DARK GRAY CHLORITE + CLAY* Alteration - COMBINATION Location: GROUNDMASS Replacing: GROUNDMASS,ALL.MINS DARK GRAY CHLORITE + CLAY; CLAY MINERALS CHLORITE Leg : 61 Top/Bottom Interval(mm): 1350/1370 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 588.00 Rock Type: IGNEOUS Core: 22 Sample Midpoint(m) : 590.86 Sect/Pc #: 2/PCE 2A ROCK = APHYRIC BASALT SLIGHTLY ALTERED,MORE COARSE GRAINED THAN PREVIOUS THIN SECTION; Texture: APHYRIC,INTERSERTAL-MICRDOLERITIC; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( TR%) CLINOPYROXENE ( TR%) Groundmass - PLAGIOCLASE ( 55%) Morphology: ELONGATE PRISMS AVERAGE DIMENSIONS = 0.04 X 0.5 MM,APPROX COMP AN54-78,ZONATED,MICROLITES; CLINOPYROXENE ( 20%) Morphology: EQUIDIMENSIONAL AVERAGE SIZE = 0.3 MM; MAGNETITE ( 8%) Morphology: INTERGRANULAR,DUST-LIKE AVERAGE SIZE = 0.04 MM; GLASS ( 17%) INTERSTITIAL* Alteration - CLAY MINERALS ( 17%) Location: INTERGRANULAR Replacing: GLASS CLAY MINERALS ( 20%) Location: INTERSTITIAL Replacing: GLASS DARK GRAY* DARK BROWN* Leg : 61 Top/Bottom Interval(mm): 610/ 680 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 588.00 Rock Type: IGNEOUS Core: 22 Sample Midpoint(m) : 591.65 Sect/Pc #: 3/PCE 1F ROCK = APHYRIC BASALT SLIGHTLY MORE COARSE GRAINED THAN PREVIOUS THIN SECTION BUT ALSO MORE RICH IN GLASS; Texture: APHYRIC,INTERSERTAL-MICRODOLERITIC; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( TR%) CLINOPYROXENE ( TR%) Groundmass - PLAGIOCLASE ( 32%) Morphology: ELONGATE PRISMS,MICROLITIC AVERAGE DIMENSIONS = 0.08 X 0.5,ZONED,APPROX COMP AN40-77,MICROLITES; CLINOPYROXENE ( 40%) Morphology: EQUIDIMENSIONAL AVERAGE SIZE; MAGNETITE ( 8%) Morphology: INTERGRANULAR GLASS ( 20%) INTERSTITIAL,ALTERED TO CLAY* Alteration - CLAY MINERALS ( 20%) Location: INTERSTITIAL Replacing: GLASS DARK BROWN* Leg : 61 Top/Bottom Interval(mm): 810/ 840 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 588.00 Rock Type: IGNEOUS Core: 22 Sample Midpoint(m) : 593.33 Sect/Pc #: 4/PCE 1C ROCK = MICRODOLERITE MORE COARSE GRAINED THAN PREVIOUS THIN SECTION, ENRICHED IN PYROXENE; Texture: MICRODOLERITIC-INTERSERTAL; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( TR%) CLINOPYROXENE ( TR%) Groundmass - OLIVINE ( 0%) PLAGIOCLASE ( 28%) Morphology: ELONGATE PRISMS AVERAGE DIMENSIONS = 0.08 X 0.9 MM,APPROX COMP AN52-71,MICROLITES; CLINOPYROXENE ( 49%) Morphology: EQUIDIMENSIONAL AVERAGE SIZE = 0.4 MM; MAGNETITE ( 8%) AVERAGE SIZE = 0.12 MM,INTERSTITIAL; GLASS ( 15%) INTERSTITIAL,ALTERED TO DARK BROWN CLAY* Alteration - CLAY MINERALS ( 15%) Location: INTERSTITIAL Replacing: GLASS DARK BROWN* Leg : 61 Top/Bottom Interval(mm): 810/ 850 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 588.00 Rock Type: IGNEOUS Core: 22 Sample Midpoint(m) : 594.83 Sect/Pc #: 5/PCE 1E ROCK = MICRODOLERITE MORE CRYSTALLINE AND COARSE GRAINED THAN PREVIOUS THIN SECTION; Texture: MICRODOLERITIC; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( TR%) Size(mm): 2 Groundmass - PLAGIOCLASE ( 32%) Morphology: ELONGATE PRISMS AVERAGE DIMENSIONS = 0.06 X 0.4 MM,ZONED,APPROX COMP AN52-67,MICROLITES; CLINOPYROXENE ( 60%) Morphology: EQUIDIMENSIONAL AVERAGE SIZE 0.1; MAGNETITE ( 8%) Morphology: IRREGULAR AVERAGE SIZE 0.1,INTERSTITIAL; GLASS ( 0%) Alteration - CLAY MINERALS ( 12%) Replacing: PYX DARK BROWN PSEUDOMORPHS* Leg : 61 Top/Bottom Interval(mm): 190/ 210 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 597.00 Rock Type: IGNEOUS Core: 23 Sample Midpoint(m) : 597.20 Sect/Pc #: 1/PCE 1A ROCK = CPX-PLAG MODERATELY MICROPHYRIC BASALT; Texture: MODERATELY MICROPHYRIC,HYALOPILITIC; Where sampled: CONTACT BETWEEN SEDIMENT AND BASALT SILL* Phenocrysts- PLAGIOCLASE ( 1%) Size(mm): 0.3-0.5 APPROX COMP AN60-65,MICROPHENOS; CLINOPYROXENE ( 5%) Size(mm): 0.3-0.4 Morphology: SUBHEDRAL-EUHEDRAL REPLACED BY CALCITE (PSEUDOMORPHS),MICROPHENOS* Groundmass - PLAGIOCLASE ( 5-6%) Size(mm): <0.1 ALTERED TO CLAY + CHLORITE; CLINOPYROXENE ( 5-6%) Size(mm): <0.1 ALTERED TO CLAY + CHLORITE; MAGNETITE ( 8%) Size(mm): 0.01 Morphology: ANGULAR MOST OF IT IS SECONDARY; GLASS ( 75%) ALTERED TO CHLORITE* Alteration - CARBONATE ( 15%) Location: VEIN,CLOT Replacing: CPX PHENOS CPX PHENOS REPLACED BY CALCITE; COMBINATION ( 45%) Location: MESOSTASIS Replacing: GLASS,PLAG,CPX INCLUDES CLAY.MINS+CHLORITE; QUARTZ ( <1%) Replacing: GLASS MAGNETITE ( <8%) 8% TOTAL MAGN OF WHICH MOST IS SECONDARY* Leg : 61 Top/Bottom Interval(mm): 690/ 710 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 597.00 Rock Type: IGNEOUS Core: 23 Sample Midpoint(m) : 599.20 Sect/Pc #: 2/PCE 1C ROCK = CPX-PLAG SPARSELY PHYRIC BASALT MASSIVE; Texture: SPARSELY PORPHYRITIC,INTERSERTAL-HYALOPILITIC; Where sampled: NEXT TO GLASSY MARGIN* Phenocrysts- PLAGIOCLASE ( 0.1%) Size(mm): 1.8 Morphology: SUBHEDRAL APPROX COMP AN65; CLINOPYROXENE ( 1-2%) Size(mm): 0.4-0.8 Morphology: SUBHEDRAL-EUHEDRAL Groundmass - PLAGIOCLASE ( 40%) Size(mm): <0.4 Morphology: SUBHEDRAL-EUHEDRAL MICROLITIC; CLINOPYROXENE ( 38%) Size(mm): <0.1 Morphology: SUBHEDRAL MICROLITIC; MAGNETITE ( 5%) Size(mm): <0.05 Morphology: ANGULAR GLASS ( 15%) MESOSTASIS* Alteration - CLAY MINERALS ( 40%) Replacing: PLAG,CPX,GLASS REPLACING MICROLITES OF PLAG + CPX* Leg : 61 Top/Bottom Interval(mm): 950/ 980 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 597.00 Rock Type: IGNEOUS Core: 23 Sample Midpoint(m) : 599.47 Sect/Pc #: 2/PCE 2A ROCK = CPX-PLAG MODERATELY MICROPHYRIC BASALT BASALT SILL; Texture: MODERATELY MICROPHYRIC,HYALOPILITIC; Where sampled: NEXT TO GLASSY MARGIN* Phenocrysts- PLAGIOCLASE ( 1%) Size(mm): 0.3-0.4 Morphology: SUBHEDRAL APPROX COMP AN65,MICROPHENOS; CLINOPYROXENE ( 3%) Size(mm): 0.3-0.4 Morphology: EUHEDRAL-SUBHEDRAL FORMS A SUBOPHITIC TEXTURE IN SOME AREAS, MICROPHENOS* Groundmass - PLAGIOCLASE ( 30%) Size(mm): <0.2 Morphology: SUBHEDRAL PARTLY MICROLITIC; CLINOPYROXENE ( 35%) Size(mm): <0.1 Morphology: SUBHEDRAL PARTLY MICROLITIC; MAGNETITE ( 6%) Size(mm): <0.05 Morphology: ANGULAR GLASS ( 15%) MOSTLY ALTERED TO CLAY MINS* Alteration - CLAY MINERALS (35-40%) Location: GROUNDMASS Replacing: CPX,GLASS Leg : 61 Top/Bottom Interval(mm): 750/ 770 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 597.00 Rock Type: IGNEOUS Core: 23 Sample Midpoint(m) : 600.76 Sect/Pc #: 3/PCE 5 ROCK = DOLERITE; Texture: SUBOPHITIC; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 4-5%) Size(mm): 0.4-0.5 Morphology: SUBHEDRAL-EUHEDRAL APPROX COMP AN65,MICROPHENOS; CLINOPYROXENE ( 3-4%) Size(mm): 0.4-0.8 Morphology: SUBHEDRAL-EUHEDRAL MICROPHENOS* Groundmass - PLAGIOCLASE Size(mm): <0.3 Morphology: SUBHEDRAL MICROLITIC; CLINOPYROXENE Size(mm): <0.3 Morphology: SUBHEDRAL MICROLITIC; MAGNETITE Size(mm): <0.1 Morphology: ANGULAR APATITE Morphology: ACICULAR IN CPX AND PLAG* Alteration - COMBINATION ( 35%) Replacing: CPX,PLAG,CPX PHENOS SMEC + CHLORITE,PHENOS AND MICROLITES OF CPX ARE OFTEN ALTERED,PLAG PARTLY ALTERED, CHLORITE SMECTITE Leg : 61 Top/Bottom Interval(mm): 80/ 100 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 606.00 Rock Type: IGNEOUS Core: 24 Sample Midpoint(m) : 606.09 Sect/Pc #: 1/PCE 2A ROCK = DOLERITE; Texture: INTERGRANULAR-SUBOPHITIC; Where sampled: SILL INTERIOR* Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 5-6%) Size(mm): 0.4-0.9 Morphology: SUBHEDRAL PLAGIOCLASE ( 5-6%) Size(mm): 0.4-0.9 Morphology: SUBHEDRAL APPROX COMP AN60,PHENOS AND MICROPHENOS; CLINOPYROXENE ( 3-4%) Size(mm): 0.3-0.4 Morphology: SUBHEDRAL-EUHEDRAL MICROPHENOS* Groundmass - PLAGIOCLASE ( 40%) Size(mm): <0.3 Morphology: EUHEDRAL-SUBHEDRAL MICROLITIC; CLINOPYROXENE ( 45%) Size(mm): <0.2 Morphology: SUBHEDRAL MICROLITIC; MAGNETITE ( 3-5%) Size(mm): <0.1 Morphology: ANGULAR QUARTZ ( TR%) ALKALI FELDSPAR ( TR%) Alteration - CLAY MINERALS ( 35%) Replacing: CPX MICROPHENOS,PLAG,CPX REPLACING MICROPHENOS OF CPX,MICROLITES OF PLAG + CPX ARE OFTEN ALTERED* Leg : 61 Top/Bottom Interval(mm): 270/ 310 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 606.00 Rock Type: IGNEOUS Core: 24 Sample Midpoint(m) : 606.29 Sect/Pc #: 1/PCE 2C ROCK = DOLERITE; Texture: SUBOPHITIC; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 6-8%) Size(mm): 0.4-1.5 Morphology: SUBHEDRAL-EUHEDRAL APPROX COMP AN65 (AN80-25?),PHENOS AND MICROPHENOS; CLINOPYROXENE ( 6-8%) Size(mm): 0.3-0.4 Morphology: SUBHEDRAL-EUHEDRAL OFTEN FORMS AGGREGATES (GLOMEROPORPHYRITIC)* Groundmass - PLAGIOCLASE ( 38%) Size(mm): <0.3 Morphology: SUBHEDRAL-EUHEDRAL MICROLITIC TO GROUNDMASS; CLINOPYROXENE ( 37%) Size(mm): <0.3 Morphology: SUBHEDRAL MICROLITIC TO GROUNDMASS; MAGNETITE ( 10%) Size(mm): <0.1 Morphology: ANGULAR GLASS FRESH; QUARTZ ( TR%) ALKALI FELDSPAR ( TR%) Alteration - CLAY MINERALS (20-30%) Replacing: CPX,PLAG ALTERED MICROLITES OF CPX + PLAG* Leg : 61 Top/Bottom Interval(mm): 510/ 540 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 606.00 Rock Type: IGNEOUS Core: 24 Sample Midpoint(m) : 611.03 Sect/Pc #: 4/PCE 4 ROCK = DOLERITE; Texture: SUBOPHITIC; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 3%) Size(mm): 0.6-1.2 Morphology: SUBHEDRAL-EUHEDRAL PHENOS + MICROPHENOS,APPROX COMP AN60-65; CLINOPYROXENE ( 5-6%) Size(mm): 0.4 Morphology: SUBHEDRAL-EUHEDRAL FORMS AGGREGATES IN SOME CASES,MICROPHENOS* Groundmass - PLAGIOCLASE ( 40%) Size(mm): <0.3 Morphology: SUBHEDRAL-EUHEDRAL MICROLITIC TO GROUNDMASS; CLINOPYROXENE ( 40%) Size(mm): <0.2 Morphology: SUBHEDRAL MICROLITIC TO GROUNDMASS; MAGNETITE ( 10%) Size(mm): <0.1 Morphology: ANGULAR Alteration - CLAY MINERALS ( 20%) Replacing: CPX,PLAG ALTERED MICROLITES OF PLAG + CPX* Leg : 61 Top/Bottom Interval(mm): 390/ 420 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 615.00 Rock Type: IGNEOUS Core: 25 Sample Midpoint(m) : 615.41 Sect/Pc #: 1/PCE 5 ROCK = DOLERITE VERY ALTERED; Texture: SUBOPHITIC (DIABASIC); Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( <1%) Size(mm): 0.2-0.6 Morphology: EUHEDRAL-SUBHEDRAL MICROPHENOS,TWINNED,APPROX COMP AN60; CLINOPYROXENE ( <1%) Size(mm): 0.3-0.5 Morphology: SUBHEDRAL MICROPHENOS,AUGITE; Groundmass - PLAGIOCLASE ( 35%) Size(mm): 0.1-0.2 Morphology: SUBHEDRAL-EUHEDRAL APPROX COMP AN60; CLINOPYROXENE ( 15%) Size(mm): 0.1-0.2 AUGITE; MAGNETITE ( 5%) Size(mm): <0.2 Morphology: SKELETAL,SUBHEDRAL TI-MAGN; GLASS (10-15%) ALTERED INTERSTITIAL PATCHES OF GLASS; QUARTZ ( TR%) IN INTERSTITIAL GLASS PATCHES; AMPHIBOLE ( 15%) RIMMING CPX* Alteration - CLAY MINERALS ( 15%) Replacing: CPX,PLAG GREEN; CHLORITE ( 15%) Replacing: CPX,PLAG Leg : 61 Top/Bottom Interval(mm): 390/ 420 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 615.00 Rock Type: IGNEOUS Core: 25 Sample Midpoint(m) : 615.41 Sect/Pc #: 1/PCE 5 ROCK = DOLERITE; Texture: INTERSERTAL-INTERGRANULAR; Where sampled: NEXT TO GLASSY MARGIN* Phenocrysts- PLAGIOCLASE ( 3%) Size(mm): 0.4-0.7 Morphology: SUBHEDRAL MICROPHENOS,APPROX COMP AN60; CLINOPYROXENE ( 3%) Size(mm): 0.2-0.5 Morphology: SUBHEDRAL MICROPHENOS,OFTEN FORMS AGGREGATES* Groundmass - PLAGIOCLASE ( 50%) Size(mm): <0.2 Morphology: SUBHEDRAL-EUHEDRAL MICROLITIC; CLINOPYROXENE ( 35%) Size(mm): <0.2 Morphology: SUBHEDRAL MICROLITIC; MAGNETITE ( 3-5%) Size(mm): <0.08 Morphology: ANGULAR GLASS ( 5%) ALTERED TO A CLAY MIN* Alteration - COMBINATION ( 40%) Replacing: PLAG,CPX,GLASS CLAY + CHLORITE REPLACE MICROLITES OF PLAG + CPX AND GLASS; CLAY MINERALS CHLORITE Leg : 61 Top/Bottom Interval(mm): 990/1020 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 615.00 Rock Type: IGNEOUS Core: 25 Sample Midpoint(m) : 616.01 Sect/Pc #: 1/PCE 9 ROCK = DOLERITE ALTERED; Texture: MICRODOLERITIC; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( <1%) CLINOPYROXENE ( <1%) Size(mm): 0.4-0.5 Groundmass - PLAGIOCLASE ( 20%) Size(mm): 0.1-0.2 Morphology: SUBHEDRAL APPROX COMP AN62; CLINOPYROXENE ( 35%) Size(mm): 0.05-0.15 AUGITE; MAGNETITE ( 10%) PERCENTAGE IS DIFFICULT TO DETERMINE BECAUSE THE THIN SECTION IS TOO THICK; GLASS ( 10%) ALTERED INTERSTITIAL PATCHES* Alteration - COMBINATION ( 25%) DARK ALTERATION PRODUCTS ARE NOT DIFFERENTIABLE DUE TO THE THICKNESS OF THIS SECTION* Leg : 61 Top/Bottom Interval(mm): 990/1020 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 615.00 Rock Type: IGNEOUS Core: 25 Sample Midpoint(m) : 616.01 Sect/Pc #: 1/PCE 9 ROCK = DOLERITE; Texture: INTERSERTAL-INTERGRANULAR; Where sampled: NEXT TO GLASSY MARGIN* Phenocrysts- PLAGIOCLASE ( 1%) Size(mm): 0.5-0.6 Morphology: SUBHEDRAL PARTLY SUBOPHITIC,APPROX COMP AN70; CLINOPYROXENE ( 3%) Size(mm): 0.5-0.6 Morphology: SUBHEDRAL PARTLY SUBOPHITIC* Groundmass - PLAGIOCLASE ( 45%) Size(mm): <0.4 Morphology: SUBHEDRAL-EUHEDRAL PARTLY MICROLITIC; CLINOPYROXENE ( 48%) Size(mm): <0.3 Morphology: SUBHEDRAL PARTLY MICROLITIC; MAGNETITE ( 2%) Size(mm): <0.05 Morphology: ANGULAR Alteration - CLAY MINERALS ( 25%) Location: SPOTS Replacing: CPX Leg : 61 Top/Bottom Interval(mm): 310/ 330 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 626.00 Rock Type: IGNEOUS Core: 27 Sample Midpoint(m) : 626.32 Sect/Pc #: 1/PCE 2 ROCK = DOLERITE ALTERED WITH GRANOPHYRIC PATCHES; Texture: DIABASIC; Where sampled: SILL INTERIOR* Phenocrysts- CLINOPYROXENE ( TR%) Size(mm): TO 0.5 AUGITE* Groundmass - PLAGIOCLASE ( 25%) Size(mm): 0.1-0.3 APPROX COMP AN58 ZONED TO AN2(; CLINOPYROXENE ( 15%) Size(mm): <0.2 AUGITE; MAGNETITE ( 10%) Size(mm): <0.2 Morphology: SUBHEDRAL TI-MAGN; COMBINATION ( 2-3%) INCLUDES ALKALI FELDSPAR + QUARTZ GRANOPHYRIC INTERGROWTHS; AMPHIBOLE ( 15%) NEEDLES + PATCHES,ACTINOLITE? + HBL; QUARTZ Morphology: CRYSTALLINE,SUBHEDRAL Alteration - CLAY MINERALS ( 20%) GREEN; CHLORITE ( 15%) Replacing: PLAG Leg : 61 Top/Bottom Interval(mm): 970/1000 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 626.00 Rock Type: IGNEOUS Core: 27 Sample Midpoint(m) : 626.99 Sect/Pc #: 1/PCE 8 ROCK = DOLERITE ALTERED,COARSE GRAINED WITH GRANOPHYRES; Texture: DIABASIC; Where sampled: SILL INTERIOR* Phenocrysts- CLINOPYROXENE ( <1%) Size(mm): 0.6-0.7 Morphology: SUBHEDRAL AUGITE* Groundmass - PLAGIOCLASE ( 23%) Size(mm): 0.2-0.5 APPROX COMP AN87 CORES WITH RIMS OF AN35; CLINOPYROXENE ( 35%) Size(mm): 0.4-0.5 AUGITE; MAGNETITE ( 7%) Size(mm): <0.2 Morphology: EUHEDRAL-SUBHEDRAL TI-MAGN; COMBINATION ( 2-3%) INCLUDES QUARTZ + ALKALI FELDSPAR GRANOPHYRES; AMPHIBOLE ACTINOLITE? (NON-PLEOCHROIC) + HBL (GAMMA= DARK BROWN--ALPHA= CLEAR--BETA= LIGHT BROWN--GAMMA TO Z= 0 DEGREES)* Alteration - COMBINATION ( 35%) Location: PATCHES INCLUDES AMPH + CHLORITE + BROWN CLAY IN PATCHES AND DISTRIBUTED THROUGH ROCK,AMPH RIMMED WITH CHLORITE* Leg : 61 Top/Bottom Interval(mm): 770/ 800 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 626.00 Rock Type: IGNEOUS Core: 27 Sample Midpoint(m) : 628.28 Sect/Pc #: 2/PCE 6 ROCK = DOLERITE ALTERED,GRANOPHYRIC; Texture: DIABASIC,COARSE GRAINED; Where sampled: SILL INTERIOR* Groundmass - PLAGIOCLASE ( 25%) Size(mm): 0.2-0.9 APPROX COMP AN70 ZONED TO AN40; CLINOPYROXENE ( 33%) Size(mm): 0.2-0.8 AUGITE; MAGNETITE ( 12%) Size(mm): TO 0.2 TI-MAGN; COMBINATION ( 1-2%) INCLUDES QUARTZ + ALK.SPAR GRANOPHYRIC PATCHES; APATITE ( TR%) Alteration - COMBINATION ( 30%) Location: PATCHES INCLUDES BROWN CLAY + AMPH* Leg : 61 Top/Bottom Interval(mm): 1250/1280 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 626.00 Rock Type: IGNEOUS Core: 27 Sample Midpoint(m) : 628.77 Sect/Pc #: 2/PCE 9 ROCK = DOLERITE GRANOPHYRIC; Texture: DIABASIC; Where sampled: SILL INTERIOR* Groundmass - PLAGIOCLASE ( 30%) Size(mm): 0.1-0.6 Morphology: SUBHEDRAL-EUHEDRAL COMPLEX TWINS,APPROX COMP AN50-AN30; CLINOPYROXENE ( 37%) Size(mm): 0.2-0.5 AUGITE,PALE BROWN; MAGNETITE ( 10%) Size(mm): <0.3 Morphology: EUHEDRAL-ANHEDRAL TI-MAGN; COMBINATION ( 3%) INCLUDES QUARTZ + ALKALI FELDSPAR GRANOPHYRIC AGGREGATES* Alteration - COMBINATION ( 20%) INCLUDES BROWN CLAY + AMPH* Leg : 61 Top/Bottom Interval(mm): 1250/1280 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 626.00 Rock Type: IGNEOUS Core: 27 Sample Midpoint(m) : 628.77 Sect/Pc #: 2/PCE 9 ROCK = MICRODOLERITE; Texture: SPOTTED MICRDOLERITIC-DOLERITIC; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 1%) AVERAGE DIMENSIONS= 0.4X1.0 MM,APPROX COMP AN52-70 (SOME GRAINS SHOW ZONING AN70-28), GLOMEROPORPHRYTIC AGGREGATES WITH CPX; CLINOPYROXENE ( 2%) AVERAGE SIZE= 0.8,GLOMEROPORPHYRITIC AGGREGATES* Groundmass - PLAGIOCLASE ( 25%) AVERAGE LENGTH= 0.1-0.6 MM,AVERAGE COMP AN62, MICROLITES,GRAIN SIZE LIMITS FOR MICRODOLERITIC AND DOLERITIC TEXTURES ARE ACCEPTABLE; CLINOPYROXENE ( 64%) Size(mm): 0.02-0.3 Morphology: EQUIDIMENSIONAL MAGNETITE ( 8%) AVERAGE SIZE= 0.2,INTERGRANULAR; GLASS HOLOCRYSTALLINE; QUARTZ ( TR%) Size(mm): 0.2-0.4 INTERGRANULAR AND IN GRANOPHYRIC AGGREGATES; ALKALI FELDSPAR ( TR%) Size(mm): 0.1 GRANOPHYRIC NUCLEARS; APATITE ( TR%) Morphology: ACICULAR NEEDLES IN QUARTZ* Alteration - CLAY MINERALS ( 15%) Location: INTERGRANULAR Replacing: ALL.MINS DARK BROWN* Leg : 61 Top/Bottom Interval(mm): 710/ 740 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 626.00 Rock Type: IGNEOUS Core: 27 Sample Midpoint(m) : 629.73 Sect/Pc #: 3/PCE 3 ROCK = MICRODOLERITE GRAIN SIZE AND TEXTURE THE SAME AS IN PREVIOUS THIN SECTION; Texture: MICRODOLERITIC-DOLERITIC; Where sampled: SILL INTERIOR Phenocrysts- PLAGIOCLASE ( TR%) Morphology: ELONGATE PRISMS,TABULAR AVERAGE LENGTH= 1.0,APPROX COMP AN52-70,SLIGHTLY CORRODED; CLINOPYROXENE ( 1%) Morphology: EQUIDIMENSIONAL SLIGHTLY CORRODED* Groundmass - PLAGIOCLASE ( 30%) AVERAGE LENGTH= 0.1-0.6,AVERAGE COMP AN62, MICROLITES,GRAIN SIZE LIMITS FOR MICRODOLERITIC AND DOLERITIC TEXTURES ARE ACCEPTABLE; CLINOPYROXENE ( 61%) Size(mm): 0.02-0.3 Morphology: EQUIDIMENSIONAL MAGNETITE ( 8%) AVERAGE SIZE= 0.2,INTERGRANULAR; GLASS HOLOCRYSTALLINE; COMBINATION ( TR%) Size(mm): 0.1-0.4 INCLUDES QUARTZ + ALKALI FELDSPAR INTERGRANULAR GRANOPHYRIC AGGREGATES; APATITE ( TR%) Morphology: ACICULAR THIN NEEDLES IN QUARTZ* Alteration - CLAY MINERALS ( 20%) Location: INTERGRANULAR Replacing: ALL.MINS PSEUDOMORPHS,PALE GRAYISH GREEN* Leg : 61 Top/Bottom Interval(mm): 1330/1360 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 626.00 Rock Type: IGNEOUS Core: 27 Sample Midpoint(m) : 630.35 Sect/Pc #: 3/PCE 6 ROCK = MICRODOLERITE ALL THE SAME AS IN PREVIOUS THIN SECTION, SUBPARALLEL PYROXENE AND MAGNETITE GRAIN CHAINS APPEAR; Texture: MICRODOLERITIC-DOLERITIC; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( TR%) Morphology: TABULAR AVERAGE SIZE= 1.6,COARSE ZONAEDGRAINS; CLINOPYROXENE ( TR%) Morphology: EQUIDIMENSIONAL AVERAGE SIZE= 1.6* Groundmass - PLAGIOCLASE (30-45%) AVERAGE LENGTH= 0.4 MM,AVERAGE COMP AN62, MICROLITES; CLINOPYROXENE (43-58%) Morphology: EQUIDIMENSIONAL AVERAGE SIZE= 0.02-0.3 MM; MAGNETITE ( 12%) AVERAGE SIZE= 0.2,INTERGRANULAR; QUARTZ ( TR%) Size(mm): 0.1-0.3 INTERGRANULAR ISOLATED GRAINS AND GRANOPHYRIC AGGREGATES; ALKALI FELDSPAR ( TR%) Size(mm): 0.1 INTERGRANULAR ISOLATED GRAINS AND GRANOPHYRIC AGGREGATES; APATITE ( TR%) Size(mm): <0.02 Morphology: ACICULAR NEEDLES IN QUARTZ* Alteration - CLAY MINERALS ( 20%) Location: INTERGRANULAR Replacing: PLAG PSEUDOMORPHS,PRESUMABLY REPLACING PLAG,PALE GRAYISH GREEN* Leg : 61 Top/Bottom Interval(mm): 960/ 980 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 630.00 Rock Type: IGNEOUS Core: 28 Sample Midpoint(m) : 630.97 Sect/Pc #: 1/PCE 4 ROCK = DOLERITE MORE COARSE GRAINED THAN PREVIOUS THIN SECTION AND MORE LEUCOCRATIC; Texture: DOLERITIC-MICRODOLERITIC* Groundmass - PLAGIOCLASE (35-45%) AVERAGE LENGTH= 0.2-0.6 MM,APPROX COMP AN43-63, MICROLITES; CLINOPYROXENE (43-53%) Morphology: EQUIDIMENSIONAL MAGNETITE ( 10%) AVERAGE SIZE= 0.6,INTERGRANULAR; GLASS HOLOCRYSTALLINE ROCK; COMBINATION ( 2%) Size(mm): 0.4-0.8 INCLUDES QUARTZ + ALK.SPAR GRANOPHYRIC INTERGROWTHS; APATITE ( TR%) Morphology: ACICULAR THIN NEEDLES IN QUARTZ* Alteration - CLAY MINERALS ( 12%) Replacing: PYX PSEUDOMORPHS,DARK BROWN* Leg : 61 Top/Bottom Interval(mm): 280/ 300 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 630.00 Rock Type: IGNEOUS Core: 28 Sample Midpoint(m) : 631.79 Sect/Pc #: 2/PCE 1B ROCK = MICRODOLERITE SLIGHTLY MORE FINE GRAINED THAN PREVIOUS THIN SECTION,INTERSTITIAL VARIOLITIC AGGREGATES; Texture: SPOTTED MICRODOLERITIC-DOLERITIC; Where sampled: SILL INTERIOR* Groundmass - PLAGIOCLASE ( 45%) Morphology: PRISMS AVERAGE LENGTH= 0.1-0.8,APPROX COMP AN60-80, MICROLITES; CLINOPYROXENE ( 33%) Morphology: EQUIDIMENSIONAL AVERAGE SIZE= 0.08-0.4 MM; MAGNETITE ( 7%) Size(mm): 0.04-0.4 INTERGRANULAR; GLASS ( 15%) AVERAGE SIZE= 0.4 MM,INTERSTITIAL VARIOLITIC AGGREGATES; QUARTZ ( TR%) Size(mm): 0.1 INTERSTITIAL* Alteration - CLAY MINERALS ( 20%) Location: INTERSTITIAL Replacing: GLASS BROWN PSEUDOMORPHS* Leg : 61 Top/Bottom Interval(mm): 730/ 750 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 630.00 Rock Type: IGNEOUS Core: 28 Sample Midpoint(m) : 632.24 Sect/Pc #: 2/PCE 2B ROCK = DOLERITE MORE COARSE GRAINED THAN PREVIOUS THIN SECTION AND MORE CRYSTALLIZED,VARIOLITIC,INTERSTITIAL; Texture: SPOTTED DOLERITIC-VARIOLITIC; Where sampled: SILL INTERIOR* Groundmass - PLAGIOCLASE ( 38%) Morphology: ELONGATE PRISMS,TABULAR LENGTH= 0.6-4 MM,APPROX COMP AN52-62; CLINOPYROXENE ( 18%) Size(mm): 0.4-5 Morphology: ELONGATE PRISMS CORRODED,INCLUDING PLAG MICROLITES; MAGNETITE ( 6%) Size(mm): 0.1-1.2 INTERGRANULAR; GLASS ( 38%) Size(mm): 1-8 INTERSTITIAL VARIOLITIC TO HYALOPILITIC MESOSTASIS* Alteration - CLAY MINERALS ( 10%) Replacing: GLASS PSEUDOMORPHS* Leg : 61 Top/Bottom Interval(mm): 80/ 100 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 630.00 Rock Type: IGNEOUS Core: 28 Sample Midpoint(m) : 633.09 Sect/Pc #: 3/PCE 1 ROCK = MICRODOLERITE MORE FINE GRAINED THAN PREVIOUS THIN SECTION, IDENTICAL TO (28-2, 28-30 CM); Texture: MICRODOLERITIC-VARIOLITIC; Where sampled: SILL INTERIOR* Groundmass - PLAGIOCLASE ( 40%) Morphology: PRISMS AVERAGE LENGTH= 0.1-0.8 MM,APPROX COMP AN60-72, MICROLITES; CLINOPYROXENE ( 38%) Morphology: EQUIDIMENSIONAL AVERAGE SIZE= 0.08-0.4; MAGNETITE ( 7%) Size(mm): 0.4-0.4 INTERGRANULAR; GLASS ( 15%) INTERSTITIAL VARIOLITIC AGGREGATES* Alteration - CLAY MINERALS ( 20%) Location: INTERSTITIAL Replacing: GLASS BROWN PSEUDOMORPHS* Leg : 61 Top/Bottom Interval(mm): 1340/1360 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 630.00 Rock Type: IGNEOUS Core: 28 Sample Midpoint(m) : 634.35 Sect/Pc #: 3/PCE 3G ROCK = MICRODOLERITE SLIGHTLY MORE FINE GRAINED THAN PREVIOUS THIN SECTION,HOLOCRYSTALLINE; Texture: MICRODOLERITIC; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( TR%) Morphology: ELONGATE PRISMS LENGTH= 1.2 MM; CLINOPYROXENE ( 1%) Morphology: EQUIDIMENSIONAL AVERAGE SIZE= 0.5,CORRODED* Groundmass - PLAGIOCLASE (35-40%) AVERAGE LENGTH= 0.4 MM,APPROX COMP AN58-65, MICROLITES; CLINOPYROXENE (53-58%) Morphology: EQUIDIMENSIONAL AVERAGE SIZE= 0.03 MM; MAGNETITE ( 7%) AVERAGE SIZE= 0.2 MM,INTERGRANULAR; GLASS HOLOCRYSTALLINE* Alteration - CLAY MINERALS ( 15%) Location: GROUNDMASS Replacing: ALL.MINS BROWN PSEUDOMORPHS AND GRAYISH GREEN GROUNDMASS* Leg : 61 Top/Bottom Interval(mm): 680/ 700 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 630.00 Rock Type: IGNEOUS Core: 28 Sample Midpoint(m) : 635.19 Sect/Pc #: 4/PCE 2B ROCK = MICRODOLERITE MORE COARSE GRAINED THAN PREVIOUS THIN SECTION; Texture: SPOTTED MICRODOLERITIC-HYALOPILITIC, INTERSTITIAL; Where sampled: SILL INTERSTITIAL* Phenocrysts- PLAGIOCLASE ( 2%) Morphology: ELONGATE PRISMS LENGTH= 0.8-1.2 MM,APPROX COMP AN72; CLINOPYROXENE ( 1%) Morphology: EQUIDIMENSIONAL CORRODED,AVERAGE SIZE= 1.2* Groundmass - PLAGIOCLASE ( 45%) LENGTH= 0.04-0.4 MM,APPROX COMP AN48-65, MICROLITES; CLINOPYROXENE ( 35%) Morphology: EQUIDIMENSIONAL AVERAGE SIZE= 0.1 MM; MAGNETITE ( 8%) AVERAGE SIZE= 0.07 MM,INTERGRANULAR; GLASS ( 12%) Size(mm): 0.1-1.3 INTERSTITIAL HYALOPILITIC AGGREGATES* Alteration - CLAY MINERALS ( 20%) Location: GROUNDMASS Replacing: GLASS,ALL.MINS BROWN PSEUDOMORPHS AND PALE GRAYISH GREEN IN GROUNDMASS* Leg : 61 Top/Bottom Interval(mm): 260/ 280 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 630.00 Rock Type: IGNEOUS Core: 28 Sample Midpoint(m) : 636.27 Sect/Pc #: 5/PCE 1 ROCK = MICRODOLERITE MORE COARSE GRAINED THAN PREVIOUS THIN SECTION; Texture: MICRODOLERITIC,HOLOCRYSTALLINE; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( RARE%) RARE RELICTS OF RESORBED COARSE GRAINS; CLINOPYROXENE ( RARE%) RARE RELICTS OF RESORBED COARSE GRAINS* Groundmass - PLAGIOCLASE ( 55%) LENGTH= 0.4-1.2,APPROX COMP AN52,MICROLITES; CLINOPYROXENE ( 40%) Size(mm): 0.2-0.8 Morphology: ELONGATED INTERGRANULAR,CORRODED; MAGNETITE ( 5%) Size(mm): 0.04-0.08 Morphology: DUST-LIKE Alteration - CLAY MINERALS ( 30%) Replacing: ALL.MINS PALE GRAYISH GREEN* Leg : 61 Top/Bottom Interval(mm): 60/ 90 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 636.00 Rock Type: IGNEOUS Core: 29 Sample Midpoint(m) : 636.08 Sect/Pc #: 1/PCE 1A ROCK = DOLERITE; Texture: SUBOPHITIC; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 5%) Size(mm): 0.4-0.8 Morphology: SUBHEDRAL-EUHEDRAL CLINOPYROXENE ( 7-10%) Size(mm): 0.4-0.9 Morphology: SUBHEDRAL Groundmass - PLAGIOCLASE ( 40%) Size(mm): <0.4 Morphology: EUHEDRAL-SUBHEDRAL MICROLITIC,OFTEN FORMS SPHERULITIC AGGREGATES; CLINOPYROXENE ( 40%) Size(mm): <0.4 Morphology: SUBHEDRAL MICROLITIC; MAGNETITE ( 5-8%) Size(mm): <0.1 Morphology: ANGULAR QUARTZ ( TR%) ALKALI FELDSPAR ( TR%) APATITE Alteration - CLAY MINERALS (10-15%) Location: SPOTS Replacing: CPX,PLAG CHLORITE Leg : 61 Top/Bottom Interval(mm): 1020/1050 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 636.00 Rock Type: IGNEOUS Core: 29 Sample Midpoint(m) : 640.03 Sect/Pc #: 3/PCE 1D ROCK = DOLERITE; Texture: SUBOPHITIC-OPHITIC; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 15%) Size(mm): 0.7-1.0 Morphology: SUBHEDRAL-EUHEDRAL APPROX COMP AN55; CLINOPYROXENE ( 15%) Size(mm): 0.6-1.0 Morphology: SUBHEDRAL-EUHEDRAL MAGNETITE ( 3-5%) Size(mm): 0.7 Morphology: SKELETAL PARTLY SKELETAL* Groundmass - PLAGIOCLASE ( 30%) Size(mm): <0.4 Morphology: EUHEDRAL APPROX COMP AN60,MICROLITIC; CLINOPYROXENE ( 30%) Size(mm): <0.4 Morphology: SUBHEDRAL MICROLITIC; MAGNETITE ( 5%) Size(mm): <0.4 Morphology: SKELETAL MICROLITIC; QUARTZ ( 1-2%) FORMS MICROPEGMATITE WITH ALK.SPAR; ALKALI FELDSPAR FORMS MICROPEGMATITE WITH QUARTZ; KAERSUTITE ( TR%) APATITE Morphology: ACICULAR Alteration - CLAY MINERALS ( 0-5%) Location: SPOTS Replacing: CPX CHLORITE ( 1%) Replacing: CPX Leg : 61 Top/Bottom Interval(mm): 370/ 400 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 636.00 Rock Type: IGNEOUS Core: 29 Sample Midpoint(m) : 642.39 Sect/Pc #: 5/PCE 1C ROCK = DOLERITE; Texture: INTERGRANULAR-SUBOPHITIC; Where sampled: SILL INTERIOR MASSIVE DOLERITE SILL* Phenocrysts- PLAGIOCLASE ( 1-3%) Size(mm): 0.7-0.8 Morphology: SUBHEDRAL APPROX COMP AN50; CLINOPYROXENE (10-12%) Size(mm): 0.7-1.2 Morphology: EUHEDRAL-SUBHEDRAL THE PHENOS OF THIS THIN SECTION ARE CHARACTERIZED BY PREVAILING LARGE CPX (ABOUT 1 MM) AND MAGN; MAGNETITE ( 2-4%) Size(mm): 0.6-1.0 Morphology: SKELETAL THE PHENOS OF THIS THIN SECTION ARE CHARACTERIZED BY PREVAILING LARGE CPX (ABOUT 1 MM) AND MAGN* Groundmass - PLAGIOCLASE ( 36%) Size(mm): <0.3 Morphology: SUBHEDRAL-EUHEDRAL CLINOPYROXENE ( 36%) Size(mm): <0.3 Morphology: SUBHEDRAL MAGNETITE ( 4-6%) Size(mm): <0.2 Morphology: SKELETAL COMBINATION ( 1-2%) INCLUDES QUARTZ + ALK.SPAR FORMING MICROPEGMATITE; KAERSUTITE ( 1%) APATITE ( TR%) Alteration - CLAY MINERALS ( 10%) Location: SPOTS Replacing: PLAG,CPX CHLORITE ( 5%) Replacing: PLAG Leg : 61 Top/Bottom Interval(mm): 970/1000 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 636.00 Rock Type: IGNEOUS Core: 29 Sample Midpoint(m) : 644.49 Sect/Pc #: 6/PCE 1 ROCK = DOLERITE; Texture: INTERGRANULAR-SUBOPHITIC; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 2-3%) Size(mm): 0.5-0.9 Morphology: SUBHEDRAL-EUHEDRAL APPROX COMP AN60-63; CLINOPYROXENE ( 5-7%) Size(mm): 0.5-0.9 Morphology: SUBHEDRAL MAGNETITE ( 1-2%) Size(mm): 0.7 Morphology: SKELETAL Groundmass - PLAGIOCLASE ( 41%) Size(mm): <0.3 Morphology: EUHEDRAL-SUBHEDRAL MICROLITIC; CLINOPYROXENE ( 40%) Size(mm): <0.3 Morphology: SUBHEDRAL MICROLITIC; MAGNETITE ( 5%) Morphology: SKELETAL COMBINATION ( 2%) INCLUDES QUARTZ + ALK.SPAR FORMING MICROPEGMATITE; KAERSUTITE ( TR%) APATITE ( TR%) Alteration - CLAY MINERALS ( 15%) Replacing: CPX CHLORITE ( 5%) Replacing: PLAG Leg : 61 Top/Bottom Interval(mm): 480/ 500 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 645.00 Rock Type: IGNEOUS Core: 30 Sample Midpoint(m) : 645.49 Sect/Pc #: 1/PCE 2 ROCK = DOLERITE; Texture: SUBOPHITIC-INTERGRANULAR; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 10%) Size(mm): 0.4-1.8 Morphology: SUBHEDRAL-EUHEDRAL CLINOPYROXENE ( 8-9%) Size(mm): 0.4-1.3 Morphology: SUBHEDRAL MAGNETITE ( 4%) Size(mm): 0.4 Morphology: SKELETAL Groundmass - PLAGIOCLASE ( 30%) Size(mm): <0.4 Morphology: EUHEDRAL-SUBHEDRAL MICROLITIC; CLINOPYROXENE ( 40%) Size(mm): <0.4 Morphology: SUBHEDRAL MICROLITIC; MAGNETITE ( 3%) Size(mm): <0.2 Morphology: SKELETAL MICROLITIC; COMBINATION ( 0-1%) INCLUDES QUARTZ + ALK.SPAR FORMING MICROPEGMATITE; KAERSUTITE ( 0-1%) Alteration - CLAY MINERALS ( 5-6%) Location: SPOTS Replacing: CPX CHLORITE ( 5-6%) Location: SPOTS Replacing: PLAG,HBL Leg : 61 Top/Bottom Interval(mm): 210/ 230 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 645.00 Rock Type: IGNEOUS Core: 30 Sample Midpoint(m) : 649.72 Sect/Pc #: 4/PCE 1 ROCK = DOLERITE; Texture: SUBOPHITIC-INTERGRANULAR; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 5-8%) Size(mm): 0.4-0.7 Morphology: SUBHEDRAL ZONED,APPROX COMP AN40-60; CLINOPYROXENE ( 4%) Size(mm): 0.4-0.8 Morphology: SUBHEDRAL-EUHEDRAL MAGNETITE ( 1-2%) Size(mm): 0.5-0.8 Morphology: SKELETAL Groundmass - PLAGIOCLASE ( 42%) Size(mm): <0.4 Morphology: SUBHEDRAL-EUHEDRAL CLINOPYROXENE ( 40%) Size(mm): <0.4 Morphology: SUBHEDRAL MAGNETITE ( 3-4%) Size(mm): <0.2 Morphology: SKELETAL-ACICULAR COMBINATION ( 0-1%) INCLUDES QUARTZ + ALK.SPAR FORMING MICROPEGMATITE; KAERSUTITE ( 0-1%) Size(mm): <0.2 HORNBLENDE GREEN* Alteration - CLAY MINERALS ( 5-10%) Location: SPOTS Replacing: CPX CHLORITE ( 5%) Location: SPOTS Replacing: PLAG Leg : 61 Top/Bottom Interval(mm): 480/ 500 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 654.00 Rock Type: IGNEOUS Core: 31 Sample Midpoint(m) : 654.49 Sect/Pc #: 1/PCE 2A ROCK = DOLERITE; Texture: SUBOPHITIC-INTERGRANULAR; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 8-10%) Size(mm): 0.4-0.7 Morphology: SUBHEDRAL APPROX COMP AN60-50; CLINOPYROXENE ( 3-5%) Size(mm): 0.4-0.7 Morphology: EUHEDRAL-SUBHEDRAL MAGNETITE ( 1-2%) Size(mm): 0.4 Morphology: SKELETAL TI-MAGN* Groundmass - PLAGIOCLASE ( 40%) Size(mm): <0.3 Morphology: SUBHEDRAL-EUHEDRAL CLINOPYROXENE ( 35%) Size(mm): <0.4 Morphology: SUBHEDRAL CLINOPYROXENE ( 35%) Size(mm): <0.4 Morphology: SUBHEDRAL MAGNETITE ( 4-5%) Size(mm): <0.2 Morphology: SKELETAL COMBINATION ( 2%) INCLUDES QUARTZ + ALK.SPAR FORMING MICROPEGMATITE; KAERSUTITE ( 0-1%) Size(mm): 0.1 Alteration - CLAY MINERALS ( 3-5%) Location: SPOTS Replacing: CPX CHLORITE ( 3-5%) Location: SPOTS Replacing: PLAG Leg : 61 Top/Bottom Interval(mm): 440/ 480 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 655.50 Rock Type: IGNEOUS Core: 32 Sample Midpoint(m) : 655.96 Sect/Pc #: 1/PCE 3 ROCK = DOLERITE; Texture: HYALOPILITIC-INTERSERTAL; Where sampled: NEXT TO GLASSY MARGIN* Phenocrysts- PLAGIOCLASE ( 1-2%) Size(mm): 0.4-0.8 Morphology: PRISMATIC APPROX COMP AN60-65; CLINOPYROXENE ( 2-3%) Size(mm): 0.4-0.8 Morphology: SUBHEDRAL OFTEN FORMS AGGREGATES* Groundmass - PLAGIOCLASE ( 42%) Size(mm): <0.2 Morphology: SUBHEDRAL CLINOPYROXENE ( 42%) Size(mm): <0.05 Morphology: SUBHEDRAL MAGNETITE ( 2-3%) Size(mm): <0.01 Morphology: DUST-LIKE GLASS ( 5-10%) ALTERED TO CLAY* Alteration - CLAY MINERALS (10-20%) Location: INTERSTITIAL Replacing: GLASS,CPX CHLORITE Location: VEIN,SPOTS Leg : 61 Top/Bottom Interval(mm): 980/ 0 Describer: Moberly, R. Hole: 462A Top of Core Depth(m) : 655.50 Rock Type: IGNEOUS Core: 32 Sample Midpoint(m) : 657.98 Sect/Pc #: 2/ ROCK = HYALOCLASTITE CEMENTED BY ZEOLITES,GRAINS= 60%,PERCENT TEXTURE= 30% SAND + 70% SILT* Groundmass - PLAGIOCLASE ( 1%) GLASS ( 40%) ONLY SLIGHTLY ALTERED,ANGULAR AND BLOCKY-POLYGONAL TO SUBROUNDED,SIZE RANGE IS 10-120 MICRONS BUT MOST GRAINS ARE 50-70 MICRONS (COARSE SILT OR FINE SAND),POORLY PACKED,WELL SORTED; OTHER ( 19%) VOLCANIC GRAINS OF LITHIC AND ALTERED LITHIC BASALT* Alteration - CLAY MINERALS IN ALTERED GLASS; ZEOLITE ( 40%) PROBABLY CLINOPTILOLITE,CEMENT CONSISTS OF A MOSAIC OF LATHS (5X2 MICRONS) OF ZEOLITES* Leg : 61 Top/Bottom Interval(mm): 100/ 120 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 685.00 Rock Type: IGNEOUS Core: 36 Sample Midpoint(m) : 685.11 Sect/Pc #: CC/PCE 2 ROCK = CPX-PLAG MODERATELY MICROPHYRIC BASALT; Texture: MODERATELY MICROPHYRIC,HYALOPILITIC-SPHERULITIC; Where sampled: SILL MARGINAL ZONE* Phenocrysts- PLAGIOCLASE ( 2%) Size(mm): 0.2-0.4 Morphology: EUHEDRAL ZONED,MICROPHENOS,APPROX COMP AN80,IN GLOMEROPHYRIC CLUSTERS WITH CPX; CLINOPYROXENE ( 3%) Size(mm): 0.1-0.3 Morphology: SUBHEDRAL AUGITE,IN GLOMEROPHYRIC CLUSTERS WITH PLAG, MICROPHENOS* Groundmass - PLAGIOCLASE ( 28%) Size(mm): <0.2 Morphology: SKELETAL,QUENCH,ANHEDRAL CLINOPYROXENE ( 37%) Size(mm): <0.2 AUGITE; MAGNETITE Size(mm): <0.04 Morphology: SKELETAL,QUENCH,GRANULAR TI-MAGN; GLASS (10-15%) Alteration - CLAY MINERALS ( 20%) Replacing: CPX,GLASS BROWNISH GREEN* Leg : 61 Top/Bottom Interval(mm): 210/ 230 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 685.00 Rock Type: IGNEOUS Core: 36 Sample Midpoint(m) : 685.22 Sect/Pc #: CC/PCE 3 ROCK = PLAG SPARSELY MICROPHYRIC BASALT MORE FINE GRAINED THAN PREVIOUS THIN SECTION,HAS VEIN-LIKE INTERSERTAL SEGREGATION; Texture: SPARSELY MICROPHYRIC,VARIOLITIC; Where sampled: GLASSY SILL MARGIN* Phenocrysts- PLAGIOCLASE ( 1%) Size(mm): 0.2 IN GLOMEROPHYRIC AGGREGATES WITH CPX,MICROPHENOS; CLINOPYROXENE ( TR%) AVERAGE SIZE= 0.4 MM,IN GLOMEROPHYRIC AGGREGATES WITH PLAG* Groundmass - PLAGIOCLASE ( 2%) Size(mm): <0.04 Morphology: LATHS IN VARIOLITIC MESOSTASIS; CLINOPYROXENE ( >1%) Size(mm): 0.08 Morphology: EQUIDIMENSIONAL MAGNETITE Size(mm): <0.01 Morphology: DUST-LIKE PERCENTAGE IS UNKNOWN; GLASS ( >95%) VARIOLITIC MESOSTASIS* Alteration - CLAY MINERALS ( 1%) Replacing: CPX,PLAG PSEUDOMORPHS AFTER CPX + PLAG IN GLOMEROPORPHYRITIC AGGREGATES,DARK BROWNISH GREEN; CLAY MINERALS ( >90%) Location: MESOSTASIS Replacing: GLASS BROWN* Leg : 61 Top/Bottom Interval(mm): 340/ 360 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 685.00 Rock Type: IGNEOUS Core: 36 Sample Midpoint(m) : 685.35 Sect/Pc #: CC/PCE 4 ROCK = APHYRIC BASALT; Texture: APHYRIC,INTERGRANULAR; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( <1%) Size(mm): 0.3-0.5 Morphology: EUHEDRAL CORRODED,MICROPHENOS; CLINOPYROXENE ( <1%) Size(mm): 0.4 AUGITE,SUBOPHITIC,MICROPHENOS* Groundmass - PLAGIOCLASE Size(mm): 0.1-0.3 Morphology: LATHS APPROX COMP AN65; CLINOPYROXENE Size(mm): 0.1-0.2 Morphology: GRANULAR AUGITE; MAGNETITE Size(mm): <0.04 TI-MAGN* Alteration - AMPHIBOLE Replacing: CPX CLAY MINERALS ( 15%) Replacing: ALL.MINS BROWN* Leg : 61 Top/Bottom Interval(mm): 530/ 550 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 691.00 Rock Type: IGNEOUS Core: 38 Sample Midpoint(m) : 691.54 Sect/Pc #: 1/PCE 6 ROCK = DOLERITE FRESH; Texture: SUBOPHITIC; Where sampled: SILL INTERIOR* Groundmass - PLAGIOCLASE ( 42%) Size(mm): 0.3-0.5 Morphology: SUBHEDRAL-ANHEDRAL APPROX COMP AN70; CLINOPYROXENE ( 43%) Size(mm): 0.3-0.5 2VZ 50,AUGITE; MAGNETITE ( 10%) Size(mm): <0.5 TI-MAGN; COMBINATION ( TR%) INCLUDES QUARTZ + ALK.SPAR GRANOPHYRES (AT LEAST QUARTZ IS PRESENT); APATITE ( TR%) Alteration - CLAY MINERALS ( 5%) Replacing: CPX BROWN* Leg : 61 Top/Bottom Interval(mm): 180/ 200 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 691.00 Rock Type: IGNEOUS Core: 38 Sample Midpoint(m) : 692.69 Sect/Pc #: 2/PCE 1 ROCK = DOLERITE RELATIVELY FRESH,FINE; Texture: DIABASIC; Where sampled: SILL INTERIOR* Groundmass - PLAGIOCLASE ( 41%) Size(mm): 0.1-0.2 APPROX COMP AN60; CLINOPYROXENE ( 41%) Size(mm): 0.1-0.2 AUGITE; MAGNETITE ( 5%) Size(mm): <0.04 TI-MAGN; GLASS ( 3%) ALTERED INTERSTITIAL PATCHES; COMBINATION ( TR%) INCLUDES QUARTZ + ALK.SPAR GRANOPHYRIC PATCHES* Alteration - CLAY MINERALS ( 10%) Replacing: CPX,GLASS BROWN* Leg : 61 Top/Bottom Interval(mm): 420/ 460 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 691.00 Rock Type: IGNEOUS Core: 38 Sample Midpoint(m) : 692.94 Sect/Pc #: 2/PCE 1 ROCK = PLAG-CPX MODERATELY MICROPHYRIC BASALT FAIRLY FRESH; Texture: MODERATELY MICROPHYRIC,VARIOLITIC,HYALOPILITIC, INTERGRANULAR; Where sampled: GLASSY SILL MARGIN* Phenocrysts- PLAGIOCLASE ( 2%) Size(mm): 0.1-0.2 Morphology: EUHEDRAL GLOMEROPHYRIC CLUSTERS WITH CPX,MICROPHENOS; CLINOPYROXENE ( 2%) Size(mm): 0.2-0.5 Morphology: EUHEDRAL GLOMEROPHYRIC CLUSTERS WITH PLAG,MICROPHENOS* Groundmass - PLAGIOCLASE ( 30%) Size(mm): <0.04 IN INTERGRANULAR PATCHES; CLINOPYROXENE ( 61%) Size(mm): <0.04 IN INTERGRANULAR PATCHES; MAGNETITE ( 5%) Size(mm): <0.04 TI-MAGN* Alteration - CLAY MINERALS ( 5-20%) Location: SPOTS Replacing: GLASS,CPX Leg : 61 Top/Bottom Interval(mm): 490/ 510 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 691.00 Rock Type: IGNEOUS Core: 38 Sample Midpoint(m) : 693.00 Sect/Pc #: 2/PCE 2 ROCK = PLAG-CPX MODERATELY MICROPHYRIC BASALT FRESH; Texture: MODERATELY MICROPHYRIC,GLASSY-VARIOLITIC; Where sampled: GLASSY SILL MARGIN* Phenocrysts- PLAGIOCLASE ( 4%) Size(mm): 0.1-0.3 Morphology: EUHEDRAL MICROPHENOS,APPROX COMP AN70,IN GLOMEROPHYRIC AGGREGATES WITH CPX; CLINOPYROXENE ( 2%) Size(mm): 0.1-0.2 Morphology: EUHEDRAL MICROPHENOS,AUGITE,IN GLOMEROPHYRIC AGGREGATES WITH PLAG* Groundmass - CLINOPYROXENE Morphology: SKELETAL QUENCH; PLAGIOCLASE PROBABLE MICROLITES,SWALLOW-TAIL TEXTURED; GLASS ( 94%) APPEARS EITHER DEVITRIFIED OR ALTERED,IT IS BROWN AND SLIGHTLY ISOTROPIC* Alteration - COMBINATION Location: GROUNDMASS Replacing: GROUNDMASS,PHENOS INCLUDES CLAY + CHLORITE,DIFFICULT TO ESTIMATE PERCENTAGE BUT BOTH ARE PRESENT REPLACING BOTH GROUNDMASS AND PHENOS* Leg : 61 Top/Bottom Interval(mm): 640/ 670 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 691.00 Rock Type: IGNEOUS Core: 38 Sample Midpoint(m) : 693.16 Sect/Pc #: 2/PCE 2 ROCK = CPX-PLAG SPARSELY MICROPHYRIC BASALT MASSIVE; Texture: SPARSELY MICROPHYRIC,INTERSERTAL; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( <1%) Size(mm): 0.2 Morphology: EUHEDRAL-SUBHEDRAL MICROPHENOS,APPROX COMP AN72; CLINOPYROXENE ( 1%) Size(mm): 0.1 Morphology: EUHEDRAL-SUBHEDRAL MICROPHENOS,AUGITE* Groundmass - PLAGIOCLASE ( 25%) Size(mm): <0.04 Morphology: SUBHEDRAL MICROLITES,APPROX COMP AN70-72; CLINOPYROXENE ( 44%) Size(mm): <0.04 Morphology: SUBHEDRAL-GRANULAR AUGITE,QUENCH TEXTURED; MAGNETITE ( 5%) Size(mm): <0.02 GLASS ( 5-10%) DIFFICULT TO IDENTIFY DUE TO REPLACEMENT BY CLAY, VARIOLITIC/SPHERULITIC PATCHES ARE PRESENT* Alteration - CLAY MINERALS ( 25%) Replacing: ALL.MINS,GLASS BROWN* Leg : 61 Top/Bottom Interval(mm): 1260/1280 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 691.00 Rock Type: IGNEOUS Core: 38 Sample Midpoint(m) : 693.77 Sect/Pc #: 2/PCE 5 ROCK = APHYRIC BASALT ALTERED,FINE GRAINED (BUT MORE COARSE GRAINED THAN PREVIOUS THIN SECTION); Texture: APHYRIC,INTERSERTAL; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( <1%) Size(mm): 0.1-0.3 Morphology: EUHEDRAL MICROPHENOS,APPROX COMP AN70,IN GLOMEROPHYRIC CLOTS WITH CPX; CLINOPYROXENE ( <1%) Size(mm): 0.1-0.2 Morphology: EUHEDRAL MICROPHENOS,AUGITE,IN GLOMEROPHYRIC CLOTS WITH PLAG* Groundmass - PLAGIOCLASE ( 25%) Size(mm): <0.04 Morphology: SUBHEDRAL,LATH-LIKE MICROLITES,APPROX COMP AN70; CLINOPYROXENE ( 49%) Size(mm): <0.04 Morphology: SUBHEDRAL-GRANULAR AUGITE,QUENCH TEXTURED,HIGH CPX/PLAG RATIO MAY ONLY BE APPARENT BECAUSE OF THE LARGE QUANTITY OF QUENCH MATERIAL; MAGNETITE Size(mm): <0.02 TI-MAGN* Alteration - CLAY MINERALS ( 25%) Replacing: GLASS,ALL.MINS BROWN* Leg : 61 Top/Bottom Interval(mm): 510/ 540 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 692.00 Rock Type: IGNEOUS Core: 39 Sample Midpoint(m) : 692.53 Sect/Pc #: 1/PCE 4 ROCK = CPX SPARSELY MICROPHYRIC BASALT; Texture: SPARSELY MICROPHYRIC,VARIOLITIC; Where sampled: SILL TOP* Phenocrysts- PLAGIOCLASE ( TR%) Morphology: ELONGATE PRISMS AVERAGE LENGTH= 0.4 MM,APPROX COMP AN68,RARELY TABULAR,MICROPHENOS; CLINOPYROXENE ( 1%) Morphology: EUHEDRAL AVERAGE SIZE= 0.3 MM,MICROPHENOS* Groundmass - PLAGIOCLASE ( 2%) Size(mm): <0.002 Morphology: LATHS CLINOPYROXENE ( TR%) Size(mm): <0.002 MAGNETITE ( 7%) Size(mm): 0.002 Morphology: DUST-LIKE GLASS ( 91%) ALTERED TO PALAGONITE (REDDISH BROWN)* Alteration - CLAY MINERALS ( 91%) Location: GROUNDMASS Replacing: GLASS PALAGONITE,REDDISH BROWN* Leg : 61 Top/Bottom Interval(mm): 970/ 990 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 692.00 Rock Type: IGNEOUS Core: 39 Sample Midpoint(m) : 694.48 Sect/Pc #: 2/PCE 5A ROCK = MICRODOLERITE MORE COARSE GRAINED THAN PREVIOUS THIN SECTION; Texture: MICRODOLERITIC; Where sampled: SILL INTERIOR* Phenocrysts- OLIVINE ( TR%) Morphology: EUHEDRAL,RHOMBIC CLAY PSEUDOMORPHS,MICROPHENOS; PLAGIOCLASE ( TR%) Morphology: TABULAR ZONED,APPROX COMP AN52-68,MICROPHENOS; CLINOPYROXENE ( TR%) Morphology: EQUIDIMENSION AVERAGE SIZE= 0.4 MM,MICROPHENOS* Groundmass - OLIVINE ( 5%) AVERAGE SIZE= 0.2 MM,CLAY PSEUDOMORPHS; PLAGIOCLASE Morphology: ELONGATE PRISMS AVERAGE LENGTH= 0.4 MM,APPROX COMP AN80; CLINOPYROXENE Morphology: EQUIDIMENSIONAL AVERAGE SIZE= 0.08 MM; MAGNETITE ( 7%) Morphology: DUST-LIKE INTERGRANULAR; GLASS ( 0%) HOLOCRYSTALLINE ROCK; SPINEL Size(mm): 0.02 Morphology: EUHEDRAL CR-SPINEL,INCLUSIONS IN CLAY PSEUDOMORPHS* Alteration - CLAY MINERALS ( 5%) Replacing: OL PSEUDOMORPHS AFTER OL,REDDISH BROWN PALAGONITE* Leg : 61 Top/Bottom Interval(mm): 760/ 780 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 692.00 Rock Type: IGNEOUS Core: 39 Sample Midpoint(m) : 695.77 Sect/Pc #: 3/PCE 3A ROCK = MICRODOLERITE MORE FINE GRAINED THAN PREVIOUS THIN SECTION, VARIOLITIC SPOTS PRESENT; Texture: MICRODOLERITIC; Where sampled: NEAR SILL BOTTOM* Groundmass - OLIVINE Size(mm): 0.08-0.2 Morphology: EUHEDRAL CLAY PSEUDOMORPHS; PLAGIOCLASE AVERAGE LENGTH= 0.2 MM,APPROX COMP AN72-85; CLINOPYROXENE AVERAGE SIZE= 0.08 MM,INTERSTITIAL,SOMETIMES AS RADIADED AGGREGATES; MAGNETITE ( 5%) Size(mm): 0.04-0.1 Morphology: DUST-LIKE,LATHS RARELY LATHS; GLASS ( 10%) Size(mm): 0.3-0.4 INTERSTITIAL VARIOLITIC AGGREGATES* Alteration - CLAY MINERALS ( 1%) Replacing: OL GRAYISH BROWN EUHEDRAL PSEUDOMORPHS* CLAY MINERALS ( 10%) REDDISH BROWN,PALAGONITE,VARIOLITIC AGGREGATES* Leg : 61 Top/Bottom Interval(mm): 1420/1440 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 692.00 Rock Type: IGNEOUS Core: 39 Sample Midpoint(m) : 696.43 Sect/Pc #: 3/PCE 3F ROCK = APHYRIC BASALT MORE FINE GRAINED THAN PREVIOUS THIN SECTION; Texture: APHYRIC,VARIOLITIC; Where sampled: SILL BOTTOM* Groundmass - OLIVINE ( TR%) Size(mm): 0.1 Morphology: EUHEDRAL CLAY PSEUDOMORPHS; PLAGIOCLASE ( 3%) Size(mm): <0.04 Morphology: LATHS CLINOPYROXENE ( 1%) Size(mm): 0.04 Morphology: EQUIDIMENSIONAL MAGNETITE ( 5%) Size(mm): <0.02 Morphology: DUST-LIKE GLASS ( 91%) GROUNDMASS* Alteration - CLAY MINERALS ( 91%) Location: MESOSTASIS Replacing: GLASS,OL REDDISH BROWN PALAGONITE,PSEUDOMORPHS AFTER OL* Leg : 61 Top/Bottom Interval(mm): 670/ 700 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 692.00 Rock Type: IGNEOUS Core: 39 Sample Midpoint(m) : 697.19 Sect/Pc #: 4/PCE 7 ROCK = APHYRIC BASALT; Texture: APHYRIC,VARIOLITIC; Where sampled: SILL TOP* Groundmass - OLIVINE ( TR%) Size(mm): 0.1 Morphology: EUHEDRAL CLAY PSEUDOMORPHS; PLAGIOCLASE ( 3%) Size(mm): <0.04 Morphology: LATHS CLINOPYROXENE ( 1%) Size(mm): 0.04 Morphology: EQUIDIMENSIONAL MAGNETITE ( 5%) Size(mm): <0.02 Morphology: DUST-LIKE GLASS ( 91%) GROUNDMASS* Alteration - CLAY MINERALS ( 91%) Location: MESOSTASIS Replacing: GLASS,OL REDDISH BROWN PALAGONITE,PSEUDOMORPHS AFTER OL* Leg : 61 Top/Bottom Interval(mm): 660/ 680 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 692.00 Rock Type: IGNEOUS Core: 39 Sample Midpoint(m) : 698.67 Sect/Pc #: 5/PCE 5 ROCK = CPX SPARSELY MICROPHYRIC BASALT SLIGHTLY MORE COARSE GRAINED THAN PREVIOUS THIN SECTION; Texture: APHYRIC,VARIOLITIC; Where sampled: SILL INTERIOR NEAR BOTTOM* Phenocrysts- PLAGIOCLASE ( TR%) AVERAGE LENGTH= 0.6 MM,MICROLITES; CLINOPYROXENE ( 1%) Morphology: EUHEDRAL AVERAGE SIZE= 0.2 MM,MICROPHENOS* Groundmass - OLIVINE ( TR%) AVERAGE SIZE= 0.2 MM,AROUND CLAY PSEUDOMORPHS; PLAGIOCLASE ( 5%) Morphology: LATHS AVERAGE LENGTH= 0.2 MM; CLINOPYROXENE ( 2%) Morphology: EQUIDIMENSIONAL AVERAGE SIZE= 0.05 MM; MAGNETITE Size(mm): <0.04 Morphology: DUST-LIKE GLASS ( 92%) MESOSTASIS ALTERED TO CLAY* Alteration - CLAY MINERALS ( 92%) Location: MESOSTASIS Replacing: GLASS,OL PSEUDOMORPHS AFTER OL* Leg : 61 Top/Bottom Interval(mm): 980/1000 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 692.00 Rock Type: IGNEOUS Core: 39 Sample Midpoint(m) : 698.99 Sect/Pc #: 5/PCE 8 ROCK = CPX-OL SLIGHTLY MICROPHYRIC BASALT SLIGHTLY MORE FINE GRAINED THAN PREVIOUS THIN SECTION; Texture: SLIGHTLY MICROPHYRIC,VARIOLITIC; Where sampled: SILL BOTTOM* Phenocrysts- OLIVINE ( 1%) Size(mm): 0.2 MICROPHENOS; PLAGIOCLASE ( TR%) Size(mm): 0.7 Morphology: TABULAR RARE MEGACRYSTS,APPROX COMP AN80; CLINOPYROXENE ( 1%) Morphology: EUHEDRAL AVERAGE SIZE= 0.4 MM,MICROPHENOS* Groundmass - PLAGIOCLASE ( 2%) Morphology: LATHS APPROX COMP AN68; CLINOPYROXENE ( 1%) Morphology: EQUIDIMENSIONAL MAGNETITE Size(mm): <0.02 Morphology: DUST-LIKE GLASS ( 95%) MESOSTASIS ALTERED TO CLAY* Alteration - CLAY MINERALS ( 95%) Location: MESOSTASIS Replacing: GLASS Leg : 61 Top/Bottom Interval(mm): 500/ 520 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 702.00 Rock Type: IGNEOUS Core: 40 Sample Midpoint(m) : 702.51 Sect/Pc #: 1/PCE 4C ROCK = CPX-OL-PLAG MODERATELY MICROPHYRIC BASALT MASSIVE; Texture: MODERATELY MICROPHYRIC,HYALOPILITIC; Where sampled: GLASSY MARGIN* Phenocrysts- OLIVINE ( 2%) Size(mm): 0.4 PSEUDOMORPH,MICROPHENOS; PLAGIOCLASE ( 1-2%) Size(mm): 0.4-0.6 Morphology: SUBHEDRAL APPROX COMP AN65-70,FORMS AGGREGATES WITH CPX; CLINOPYROXENE ( 2-3%) Size(mm): 0.3-0.4 Morphology: SUBHEDRAL MICROPHENOS,FORMS AGGREGATES WITH PLAG* Groundmass - PLAGIOCLASE ( 20%) Size(mm): <0.15 Morphology: SUBHEDRAL CLINOPYROXENE (30-35%) Size(mm): <0.06 Morphology: SLIGHTLY SPHERULITIC- Morphology: DENDRITIC MAGNETITE ( 10%) Size(mm): <0.01 Morphology: DUST-LIKE GLASS (25-30%) ALTERED TO CLAY MINS* Alteration - CLAY MINERALS ( 30%) Location: MESOSTASIS Replacing: GLASS,PLAG,CPX Leg : 61 Top/Bottom Interval(mm): 570/ 600 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 702.00 Rock Type: IGNEOUS Core: 40 Sample Midpoint(m) : 702.59 Sect/Pc #: 1/PCE 5A ROCK = CPX-PLAG-OL MODERATELY MICROPHYRIC BASALT MASSIVE; Texture: MODERATELY MICROPHYRIC,HYALOPILITIC; Where sampled: GLASSY MARGIN* Phenocrysts- OLIVINE ( 1%) Size(mm): 0.2 PSEUDOMORPH,MICROPHENOS; PLAGIOCLASE ( 1%) Size(mm): 0.3-0.4 Morphology: SUBHEDRAL APPROX COMP AN65,MICROPHENOS,OFTEN FORMS AGGREGATES WITH CPX; CLINOPYROXENE ( 1-2%) Size(mm): 0.2-0.3 Morphology: EUHEDRAL MICROPHENOS,OFTEN FORMS AGGREGATES WITH PLAG* Groundmass - PLAGIOCLASE ( 15%) Size(mm): <0.05 Morphology: ANHEDRAL CLINOPYROXENE ( 15%) Size(mm): <0.05 Morphology: SUBHEDRAL-ANHEDRAL MAGNETITE ( 7%) Size(mm): <0.01 Morphology: DUST-LIKE GLASS ( 60%) ALTERED TO CLAY (OR ZEOLITE)* Alteration - COMBINATION (20-30%) Location: MESOSTASIS Replacing: GLASS INCLUDES CLAYS + ZEOLITES* Leg : 61 Top/Bottom Interval(mm): 230/ 250 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 702.00 Rock Type: IGNEOUS Core: 40 Sample Midpoint(m) : 703.74 Sect/Pc #: 2/PCE 1A ROCK = DOLERITE; Texture: HYALOPILITIC; Where sampled: GLASSY MARGIN OF SILL* Phenocrysts- PLAGIOCLASE (10-12%) Size(mm): 0.4-0.8 Morphology: ACICULAR-SUBHEDRAL APPROX COMP AN70; CLINOPYROXENE (10-12%) Size(mm): 0.2 Morphology: EUHEDRAL-SUBHEDRAL MICROPHENOS* Groundmass - PLAGIOCLASE ( 10%) Size(mm): <0.4 Morphology: ACICULAR CLINOPYROXENE ( 10%) Size(mm): <0.1 Morphology: SUBHEDRAL-ANHEDRAL MAGNETITE ( 5-10%) Size(mm): <0.01 Morphology: DUST-LIKE GLASS (45-50%) ALTERED TO CLAY MIN OR ZEOLITE* Alteration - CARBONATE ( 5%) Replacing: CPX MICROPHENOS COMBINATION ( 30%) Location: MESOSTASIS INCLUDES CLAYS + ZEOLITES* Leg : 61 Top/Bottom Interval(mm): 410/ 430 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 702.00 Rock Type: IGNEOUS Core: 40 Sample Midpoint(m) : 703.92 Sect/Pc #: 2/PCE 1B ROCK = DOLERITE; Texture: INTERSERTAL-SUBOPHITIC; Where sampled: NEXT TO GLASSY MARGIN OF SILL* Phenocrysts- PLAGIOCLASE ( 20%) Size(mm): 0.4-0.8 Morphology: PRISMATIC APPROX COMP AN55,FORMING A SPHERULITIC TEXTURE; CLINOPYROXENE ( 26%) Size(mm): 0.2-0.5 Morphology: SUBHEDRAL 0.2 MM IS PREVAILING,MICROPHENOS* Groundmass - OLIVINE ( 1%) Size(mm): 0.2 PSEUDOMORPH; PLAGIOCLASE ( 25%) Size(mm): <0.3 Morphology: SUBHEDRAL-EUHEDRAL PARTLY MICROLITIC; CLINOPYROXENE ( 25%) Size(mm): <0.1 Morphology: SUBHEDRAL-ANHEDRAL PARTLY MICROLITIC; MAGNETITE ( 3-5%) Size(mm): 0.1-0.2 Morphology: ANGULAR-PRISMATIC Alteration - COMBINATION (10-15%) Location: INTERSTITIAL Replacing: CPX,PLAG INCLUDES CLAYS + ZEOLITES* Leg : 61 Top/Bottom Interval(mm): 100/ 120 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 711.00 Rock Type: IGNEOUS Core: 41 Sample Midpoint(m) : 711.11 Sect/Pc #: 1/PCE 1 ROCK = DOLERITE; Texture: INTERGRANULAR-SUBOPHITIC; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 40%) Size(mm): 0.3-0.8 Morphology: ACICULAR,SUBHEDRAL APPROX COMP AN65,0.8 MM= ACICULAR TYPE AND 0.3 MM= SUBHEDRAL TYPE; CLINOPYROXENE ( 40%) Size(mm): 0.2-0.3 Morphology: SUBHEDRAL MAGNETITE ( 5%) Size(mm): 0.2 Morphology: ANGULAR TI-MAGN* Groundmass - PLAGIOCLASE ( 5%) Size(mm): <0.1 Morphology: SUBHEDRAL PARTLY MICROLITIC; CLINOPYROXENE ( 5%) Size(mm): <0.1 Morphology: SUBHEDRAL PARTLY MICROLITIC; MAGNETITE ( 2%) Size(mm): <0.1 Morphology: DUST-LIKE PARTLY MICROLITIC* Alteration - CLAY MINERALS ( 5-8%) Location: PLAG, Replacing: PLAG Location: INTERSTITIAL FOUND WITHIN PLAG AND INTERSTITIAL; CHLORITE ( 3%) Leg : 61 Top/Bottom Interval(mm): 1300/1330 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 711.00 Rock Type: IGNEOUS Core: 41 Sample Midpoint(m) : 712.32 Sect/Pc #: 1/PCE 5C ROCK = DOLERITE FROM A MASSIVE DOLERITE SILL; Texture: INTERSERTAL TO INTERGRANULAR; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 10%) Size(mm): 0.3-0.8 Morphology: ACICULAR,SUBHEDRAL 2 TYPES (EITHER ACICULAR OR SUBHEDRAL,APPROX COMP AN65,MEGACRYST (2-2.5 MM / APPROX COMP AN75-80); CLINOPYROXENE ( 10%) Size(mm): 0.3-0.4 Morphology: SUBHEDRAL MICROPHENOS* Groundmass - PLAGIOCLASE ( 35%) Size(mm): <0.2 Morphology: SUBHEDRAL MICROLITES; CLINOPYROXENE ( 40%) Size(mm): <0.2 Morphology: SUBHEDRAL MICROLITES; MAGNETITE ( 4-5%) Size(mm): <0.2 Morphology: ANGULAR CLOSELY ASSOCIATED WITH ALTERED PARTS,MICROLITES; COMBINATION ( TR%) INCLUDES QUARTZ + ALK.SPAR,INTERGROWN, MICROPEGMATITE* Alteration - CLAY MINERALS ( 5-10%) Location: SPOTS Replacing: PLAG CHLORITE ( 3%) Location: INTERSTITIAL Leg : 61 Top/Bottom Interval(mm): 1100/1120 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 711.00 Rock Type: IGNEOUS Core: 41 Sample Midpoint(m) : 713.61 Sect/Pc #: 2/PCE 1C ROCK = DOLERITE MASSIVE DOLERITE SILL; Texture: SUBOPHITIC-INTERSERTAL; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 10%) Size(mm): 0.4 Morphology: ACICULAR,SUBHEDRAL APPROX COMP AN60-65,2 TYPES (EITHER ACICULAR OR SUBHEDRAL); CLINOPYROXENE ( 10%) Size(mm): 0.4 Groundmass - PLAGIOCLASE Size(mm): <0.3 Morphology: SUBHEDRAL-ANHEDRAL MICROLITES; CLINOPYROXENE Size(mm): <0.3 Morphology: SUBHEDRAL MICROLITES; MAGNETITE ( 4-5%) Size(mm): <0.2 Morphology: ANGULAR CLOSELY ASSOCIATED WITH ALTERED PART; COMBINATION ( TR%) INCLUDES QUARTZ + ALK.SPAR,INTERGROWN, MICROPEGMATITE; HORNBLENDE GREEN,OBSERVED AT MARGIN OF CPX* Alteration - CLAY MINERALS ( 5-10%) Location: SPOTS Replacing: PLAG CHLORITE ( 3-5%) Leg : 61 Top/Bottom Interval(mm): 800/ 820 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 711.00 Rock Type: IGNEOUS Core: 41 Sample Midpoint(m) : 716.31 Sect/Pc #: 4/PCE 1C ROCK = DOLERITE MASSIVE; Texture: SUBOPHITIC-INTERGRANULAR; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 5-8%) Size(mm): 0.4-0.8 Morphology: SUBHEDRAL APPROX COMP AN60; CLINOPYROXENE ( 5-8%) Size(mm): 0.4 Morphology: SUBHEDRAL-ANHEDRAL MAGNETITE ( 1%) Size(mm): 0.8-1.0 Morphology: SKELETAL TI-MAGN,COEXISTS WITH GREEN HBL* Groundmass - PLAGIOCLASE ( 40%) Size(mm): <0.3 Morphology: SUBHEDRAL MICROLITES; CLINOPYROXENE ( 40%) Size(mm): <0.3 Morphology: SUBHEDRAL MICROLITES; MAGNETITE ( 5-6%) Size(mm): <0.3 Morphology: SKELETAL,DUST-LIKE SEEMS TO BE CLOSELY ASSOCIATED WITH ALTERED AREA (SECONDARY MINERAL); COMBINATION ( TR%) INCLUDES QUARTZ + ALKALI FELDSPAR,INTERGROWTHS; HORNBLENDE GREEN* Alteration - COMBINATION ( 5-10%) Location: SPOTS Replacing: PLAG INCLUDES CLAYS + ZEOLITES; CHLORITE ( 3-5%) Location: SPOTS Replacing: PLAG Leg : 61 Top/Bottom Interval(mm): 780/ 800 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 711.00 Rock Type: IGNEOUS Core: 41 Sample Midpoint(m) : 717.79 Sect/Pc #: 5/PCE 1E ROCK = DOLERITE MASSIVE; Texture: SUBOPHITIC-INTERGRANULAR; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE (10-13%) Size(mm): 0.5-1.0 Morphology: SUBHEDRAL APPROX COMP AN55-60; CLINOPYROXENE ( 10%) Size(mm): 0.4-0.5 Morphology: SUBHEDRAL MAGNETITE ( 1-2%) Size(mm): 0.4 Morphology: SKELETAL TI-MAGN* Groundmass - PLAGIOCLASE ( 35%) Size(mm): <0.4 Morphology: SUBHEDRAL MICROLITES; CLINOPYROXENE ( 35%) Size(mm): <0.3 Morphology: SUBHEDRAL-ANHEDRAL MICROLITES; MAGNETITE ( 5-8%) Size(mm): <0.2 COMBINATION ( TR%) INCLUDES QUARTZ + ALK.SPAR,MICROPEGMATITE; HORNBLENDE ( TR%) A TRACE OF BOTH GREEN AND BROWN HBL* Alteration - CLAY MINERALS (10-15%) Location: SPOTS Replacing: PLAG CHLORITE ( 3-5%) Location: SPOTS Replacing: PLAG Leg : 61 Top/Bottom Interval(mm): 900/ 920 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 711.00 Rock Type: IGNEOUS Core: 41 Sample Midpoint(m) : 719.41 Sect/Pc #: 6/PCE 1D ROCK = DOLERITE; Texture: SUBOPHITIC-INTERGRANULAR; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE (15-20%) Size(mm): 0.5-0.8 Morphology: SUBHEDRAL APPROX COMP AN65-70; CLINOPYROXENE ( 8-10%) Size(mm): 0.5-0.7 Morphology: SUBHEDRAL MAGNETITE ( 2-4%) Size(mm): 0.4 Morphology: SKELETAL TI-MAGN* Groundmass - OLIVINE ( 1-2%) Size(mm): 0.2 PLAGIOCLASE ( 30%) Size(mm): <0.4 Morphology: SUBHEDRAL MICROLITES; CLINOPYROXENE ( 30%) Size(mm): <0.4 Morphology: SUBHEDRAL MICROLITES; MAGNETITE ( 5-8%) Size(mm): <0.2 Morphology: SKELETAL COMBINATION QUARTZ + ALK.SPAR, MICROPEGMATITE; APATITE ( TR%) HORNBLENDE ( TR%) BROWN* Alteration - COMBINATION ( 5-10%) Location: SPOTS Replacing: PLAG INCLUDES CLAYS + ZEOLITES; CHLORITE ( 3-5%) Location: SPOTS Replacing: PLAG,CPX Leg : 61 Top/Bottom Interval(mm): 960/ 990 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 711.00 Rock Type: IGNEOUS Core: 41 Sample Midpoint(m) : 720.98 Sect/Pc #: 7/PCE 1F ROCK = PLAG-OL-CPX MODERATELY PHYRIC BASALT; Texture: MODERATELY PORPHYRITIC,HYALOPILITIC; Where sampled: GLASSY MARGIN OF SILL* Phenocrysts- OLIVINE ( 1-2%) Size(mm): 0.2 PSEUDOMORPH,MICROPHENOS; PLAGIOCLASE ( 3-5%) Size(mm): 0.5-1.5 Morphology: ACICULAR APPROX COMP AN65; CLINOPYROXENE ( 1%) Size(mm): 0.5 Morphology: SUBHEDRAL-EUHEDRAL Groundmass - PLAGIOCLASE ( 20%) Size(mm): <0.4 Morphology: ACICULAR PARTLY MICROLITES; CLINOPYROXENE (10-15%) Size(mm): <0.3 Morphology: SUBHEDRAL PARTLY MICROLITES; MAGNETITE ( 5-6%) Size(mm): <0.01 Morphology: DUST-LIKE SECONDARY MINERAL?; GLASS ( 50%) ALTERED TO CLAY* Alteration - COMBINATION (35-40%) Location: INTERSTITIAL Replacing: GLASS,CPX,PLAG INCLUDES CLAY.MINS+ZEOLITES* Leg : 61 Top/Bottom Interval(mm): 370/ 390 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 729.00 Rock Type: IGNEOUS Core: 44 Sample Midpoint(m) : 729.38 Sect/Pc #: 1/PCE 3 ROCK = PLAG-OL-SPINEL MODERATELY MICROPHYRIC BASALT ALTERED; Texture: MODERATELY MICROPHYRIC,GLASSY-VARIOLITIC; Where sampled: GLASSY MARGIN* Phenocrysts- OLIVINE ( 2%) Size(mm): 0.1-0.6 MICROPHENOS,PSEUDOMORPHS AFTER ZEOLITE + CLAY + AMPH; PLAGIOCLASE ( 2%) Size(mm): 0.2-0.5 MICROPHENOS,APPROX COMP AN65; SPINEL ( <1%) Size(mm): <0.02 MICROPHENOS,AS INCLUSIONS IN OL PSEUDOMORPHS* Groundmass - PLAGIOCLASE ( 3%) Size(mm): <0.05 Morphology: SKELETAL SMALL XTLS + MICROLITES + CRYSTALLITES; MAGNETITE ( 3%) Size(mm): 0.002 Morphology: DUST-LIKE FINE TI-MAGN; GLASS ( 90%) VARIOLITIC AND SPHERULITIC TEXTURE* Alteration - AMPHIBOLE Replacing: OL BROWN PLEOCHROIC AND FIBROUS; CLAY MINERALS Replacing: GLASS,OL,PLAG PERCENTAGE VARIABLE; ZEOLITE Location: GROUNDMASS, Replacing: OL,PLAG Location: VEINS PERCENTAGE VARIABLE* Leg : 61 Top/Bottom Interval(mm): 1280/1300 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 729.00 Rock Type: IGNEOUS Core: 44 Sample Midpoint(m) : 730.29 Sect/Pc #: 1/PCE 8 ROCK = PLAG-OL-CPX-SPINEL MODERATELY MICROPHYRIC BASALT; Texture: MODERATELY MICROPHYRIC,FINE GRAINED, HYALOPILITIC-INTERSERTAL; Where sampled: PILLOW/SILL INTERIOR* Phenocrysts- OLIVINE ( 3%) Size(mm): 0.2-0.5 MICROPHENOS,PSEUDOMORPHS (CLAY ET AL)* PLAGIOCLASE ( 4%) Size(mm): 0.1-0.4 MICROPHENOS,APPROX COMP AN58 ZONED TO AN30; CLINOPYROXENE ( 1%) Size(mm): <0.05 MICROPHENOS,AUGITE,2VZ 50; SPINEL ( <1%) Size(mm): 0.03 MICROPHENOS,PICOTITE?,INCLUSIONS IN OL PSEUDOMORPHS* Groundmass - PLAGIOCLASE ( 27%) QUENCH MICROLITES + CRYSTALLITES + ETC.; CLINOPYROXENE ( 50%) QUENCH XTLS IN GROUNDMASS; MAGNETITE Size(mm): <.0125 TI-MAGN* Alteration - QUARTZ ( .1%) Location: GROUNDMASS Replacing: GROUNDMASS AMPHIBOLE Replacing: OL BROWN PLEOCHROIC AND FIBROUS,PERCENTAGE VARIABLE; CLAY MINERALS ( 15%) Location: VEIN Replacing: GLASS,OL,PLAG ZEOLITE Location: GROUNDMASS Replacing: OL,PLAG,GROUNDMASS Leg : 61 Top/Bottom Interval(mm): 270/ 300 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 729.00 Rock Type: IGNEOUS Core: 44 Sample Midpoint(m) : 730.78 Sect/Pc #: 2/PCE 3 ROCK = OL-PLAG-SPINEL MODERATELY MICROPHYRIC BASALT ALTERED; Texture: MODERATELY MICROPHYRIC,GLASSY-VARIOLITIC; Where sampled: GLASSY MARGIN* Phenocrysts- PLAGIOCLASE ( 5%) Size(mm): 0.01 Morphology: SKELETAL OLIVINE ( 3%) Size(mm): 0.2-0.4 Morphology: EUHEDRAL MICROPHENOS,PSEUDOMORPHS; CRYSTALS AND CRYSTALLITES; PLAGIOCLASE ( 2%) Size(mm): 0.2-0.5 Morphology: EUHEDRAL MAGNETITE Size(mm): <0.002 Morphology: DUST-LIKE IN VARIOLITIC ZONE; MICROPHENOS,APPROX COMP AN80; SPINEL ( <1%) Size(mm): <0.03 GLASS ( 90%) VARIOLITIC AND NON-VARIOLITIC TEXTURED,MOSTLY INCLUSIONS IN OL PSEUDOMORPHS* REPLACED BY SMEC + ZEOLITE ET AL* Alteration - AMPHIBOLE Replacing: OL REPLACING CORES OF OL GRAINS,BROWN PLEOCHROIC AND FIBROUS,PERCENTAGE VARIABLE; CLAY MINERALS Replacing: GLASS,OL BROWN,PERCENTAGE VARIABLE; ZEOLITE Location: VEINS Replacing: GLASS,PLAG PERCENTAGE VARIABLE* Leg : 61 Top/Bottom Interval(mm): 530/ 560 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 729.00 Rock Type: IGNEOUS Core: 44 Sample Midpoint(m) : 731.05 Sect/Pc #: 2/PCE 6 ROCK = CPX-PLAG-OL MODERATELY MICROPHYRIC BASALT; Texture: MODERATELY MICROPHYRIC,FINE GRAINED,INTERSERTAL; Where sampled: PILLOW/SILL INTERIOR* Phenocrysts- OLIVINE ( <1%) Size(mm): <0.2 MICROPHENOS,PSEUDOMORPHS AFTER CLAY; PLAGIOCLASE ( 2%) Size(mm): <0.3 MICROPHENOS,APPROX COMP AN73-75,PATCHY DISTRIBUTION; CLINOPYROXENE ( 3%) Size(mm): <0.1 MICROPHENOS,AUGITE,SECTOR ZONED; SPINEL ( TR%) Size(mm): <0.03 INCLUSIONS IN OL PSEUDOMORPHS* Groundmass - PLAGIOCLASE ( 30%) Size(mm): TO 0.5 Morphology: SKELETAL LATHS BELT BUCKLE TEXTURED; CLINOPYROXENE ( 55%) Morphology: SPRAYS MICROLITES AND QUENCH TEXTURED SPRAYS; MAGNETITE ( 10%) Size(mm): <0.02 Morphology: DUST-LIKE TI-MAGN* Alteration - CLAY MINERALS ( 5-10%) Replacing: CPX,PLAG,OL REPLACING QUENCH CPX + PLAG,PSEUDOMORPHS AFTER OL; CHLORITE ( TR%) Location: GROUNDMASS Replacing: PLAG,GROUNDMASS Leg : 61 Top/Bottom Interval(mm): 1060/1080 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 729.00 Rock Type: IGNEOUS Core: 44 Sample Midpoint(m) : 731.57 Sect/Pc #: 2/PCE 8 ROCK = PLAG-OL MODERATELY MICROPHYRIC BASALT ALTERED; Where sampled: PILLOW INTERIOR* Phenocrysts- OLIVINE ( 1%) Size(mm): 0.1-0.2 PSEUDOMORPHS AFTER CLAY (BROWN),MICROPHENOS; PLAGIOCLASE ( 5%) Size(mm): TO 0.5 Morphology: SKELETAL,EUHEDRAL APPROX COMP AN75,MICROPHENOS; SPINEL ( TR%) Size(mm): <0.03 INCLUSIONS IN OL PSEUDOMORPHS,MICROPHENOS* Groundmass - PLAGIOCLASE ( 30%) VERY FINE QUENCH TEXTURE; CLINOPYROXENE ( 43%) VERY FINE QUENCH TEXTURE; MAGNETITE ( 15%) Size(mm): <0.02 TI-MAGN; GLASS ( 5-10%) MOSTLY REPLACED BY CLAY MINS* Alteration - CLAY MINERALS ( 15%) Location: GROUNDMASS Replacing: GLASS,OL,XTLS BROWN PSEUDOMORPHS AFTER OL; ZEOLITE ( 5%) Location: GROUNDMASS, Replacing: GLASS Location: VEINS CHLORITE ( 1%) Replacing: PLAG MICROPHENOS Leg : 61 Top/Bottom Interval(mm): 120/ 140 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 733.00 Rock Type: IGNEOUS Core: 45 Sample Midpoint(m) : 733.13 Sect/Pc #: 1/PCE 1A ROCK = PLAG-CPX MODERATELY MICROPHYRIC BASALT MASSIVE; Texture: MODERATELY MICROPHYRIC,FINE GRAINED,SPINIFEX Piece #: HYRY; Where sampled: SILL INTERIOR BELOW PILLOW COMPLEX* Phenocrysts- PLAGIOCLASE ( 4%) Size(mm): <0.2 CLAY-AMPH PSEUDOMORPHS,MICROPHENOS; CLINOPYROXENE ( <1%) Size(mm): 0.5 AUGITE,A SINGLE LARGE PHENO; SPINEL ( TR%) Size(mm): <0.02 INCLUSIONS IN OL PSEUDOMORPHS* Groundmass - PLAGIOCLASE ( 12%) Morphology: SKELETAL,ACICULAR LATHS APPROX COMP AN70,1.0 MM LONG; CLINOPYROXENE ( 59%) Morphology: SPRAYS SPINIFEX TEXTURED SPRAYS IN GROUNDMASS; MAGNETITE ( 15%) Size(mm): <0.02 TI-MAGN* Alteration - CARBONATE ( <1%) Location: VUGS Replacing: GROUNDMASS IN VUGS REPLACING GROUNDMASS* CLAY MINERALS ( 10%) Location: GROUNDMASS Replacing: OL BROWN* Vesicles - Percent: <1 Filling: CALCITE MAY BE SMALL VESICLES FILLED WITH CALCITE* Leg : 61 Top/Bottom Interval(mm): 140/ 170 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 733.00 Rock Type: IGNEOUS Core: 45 Sample Midpoint(m) : 734.66 Sect/Pc #: 2/PCE 2A ROCK = OL-PLAG MODERATELY MICROPHYRIC BASALT; Texture: MODERATELY MICROPHYRIC,FINE GRAINED,SPINIFEX, SPHERULITIC; Where sampled: BELOW PILLOW PART IN SILL INTERIOR* Phenocrysts- OLIVINE ( 5%) Size(mm): 0.3-0.5 PSEUDOMORPHS AFTER CLAY,MICROPHENOS; PLAGIOCLASE ( 4%) Size(mm): 0.2-0.5 APPROX COMP AN72-75,MICROPHENOS* Groundmass - PLAGIOCLASE ( 15%) Morphology: SKELETAL,ACICULAR 0.5 MM LONG,APPROX COMP AN72-75; CLINOPYROXENE ( 61%) Morphology: SPRAYS,NEEDLES QUENCH TEXTURED; MAGNETITE ( 10%) Size(mm): <0.005 Morphology: DUST-LIKE TI-MAGN* Alteration - AMPHIBOLE Replacing: OL REPLACING CORES OF OL XTLS; CLAY MINERALS ( 5%) Replacing: CPX,OL MICROPHENOS BROWN,PSEUDOMORPHS AFTER OL,REPLACING QUENCH CPX ET AL; CHLORITE ( TR%) Leg : 61 Top/Bottom Interval(mm): 610/ 630 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 733.00 Rock Type: IGNEOUS Core: 45 Sample Midpoint(m) : 735.12 Sect/Pc #: 2/PCE 2E ROCK = APHYRIC BASALT; Texture: APHYRIC,FINE GRAINED,EQUIGRANULAR; Where sampled: SILL INTERIOR* Phenocrysts- OLIVINE ( TR%) UNCLEAR PSEUDOMORPHS; PLAGIOCLASE ( TR%) Size(mm): <0.5 Morphology: SUBHEDRAL CORRODED,APPROX COMP AN70,MICROPHENOS* Groundmass - PLAGIOCLASE ( 30%) Size(mm): <0.3 Morphology: LONG ACICULAR LATHS CLINOPYROXENE ( 50%) Size(mm): <0.1 AUGITE; MAGNETITE ( 10%) Size(mm): <0.1 TI-MAGN* Alteration - AMPHIBOLE ( TR%) CLAY MINERALS ( 10%) Replacing: CPX BROWN* CHLORITE ( TR%) Replacing: OL REPLACING OL?* Leg : 61 Top/Bottom Interval(mm): 1220/1240 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 733.00 Rock Type: IGNEOUS Core: 45 Sample Midpoint(m) : 735.73 Sect/Pc #: 2/PCE 4 ROCK = PLAG-OL MODERATELY MICROPHYRIC BASALT; Texture: MODERATELY MICROPHYRIC,FINE GRAINED, SPINIFEX-LIKE,INTERGRANULAR; Where sampled: SILL INTERIOR* Phenocrysts- OLIVINE ( 3%) Size(mm): <0.5 PSEUDOMORPHS OF CLAY + AMPH,MICROPHENOS; PLAGIOCLASE ( 3%) Size(mm): <0.4 Morphology: EUHEDRAL APPROX COMP AN75,OSCILLATORY ZONING,MICROPHENOS; SPINEL ( TR%) Size(mm): <0.003 INCLUSIONS IN OL,MICROPHENOS* Groundmass - PLAGIOCLASE ( 15%) Size(mm): <0.5 Morphology: ACICULAR LATHS,SKELETAL XTLS APPROX COMP AN75; CLINOPYROXENE ( 64%) Morphology: GRANULES,SPRAYS TINY SPINIFEX-LIKE GRANULES AND SPRAYS; MAGNETITE ( 10%) Size(mm): <0.04 Morphology: DUST-LIKE TI-MAGN* Alteration - AMPHIBOLE Replacing: OL BROWN,PSEUDOMORPHS AFTER OL; CLAY MINERALS ( 5%) Replacing: PYX,OL BROWN,PSEUDOMORPHS AFTER OL* Leg : 61 Top/Bottom Interval(mm): 500/ 520 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 733.00 Rock Type: IGNEOUS Core: 45 Sample Midpoint(m) : 736.51 Sect/Pc #: 3/PCE 1D ROCK = PLAG-OL MODERATELY MICROPHYRIC BASALT ALTERED; Texture: MODERATELY MICROPHYRIC,FINE GRAINED, EQUIGRANULAR; Where sampled: SILL INTERIOR* Phenocrysts- OLIVINE ( 2%) Size(mm): 0.3-0.5 PSEUDOMORPHS OF BROWN CLAY,MICROPHENOS; PLAGIOCLASE ( 2%) Size(mm): 0.2-0.4 CORRODED,APPROX COMP AN65?,MICROPHENOS; SPINEL ( TR%) Size(mm): <0.003 SMALL INCLUSIONS IN OL,MICROPHENOS* Groundmass - PLAGIOCLASE ( 25%) Size(mm): <0.2 Morphology: TABULAR,SKELETAL LATHS APPROX COMP AN68; CLINOPYROXENE ( 51%) Size(mm): <0.1 Morphology: GRANULAR QUENCH; MAGNETITE ( 5%) Size(mm): <0.04 Morphology: EUHEDRAL TI-MAGN* Alteration - CLAY MINERALS ( 15%) Location: PATCHES Replacing: ROCK BROWN* Vesicles - Size(mm): 0.4 Percent: <1 Filling: EMPTY Shape: EGG-SHAPE ONE VESICLE 0.4 MM IN DIAMETER* Leg : 61 Top/Bottom Interval(mm): 200/ 220 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 738.00 Rock Type: IGNEOUS Core: 46 Sample Midpoint(m) : 738.21 Sect/Pc #: 1/PCE 1A ROCK = OL-PLAG MODERATELY MICROPHYRIC BASALT; Texture: MODERATELY MICROPHYRIC,FINE GRAINED, EQUIGRANULAR; Where sampled: SILL INTERIOR* Phenocrysts- OLIVINE ( 3%) Size(mm): 0.3-0.5 PSEUDOMORPHS OF BROWN CLAY,MICROPHENOS; PLAGIOCLASE ( 2%) Size(mm): 0.2-0.8 Morphology: EUHEDRAL CORRODED,APPROX COMP AN68; SPINEL ( TR%) Size(mm): <0.003 INCLUSIONS IN OL,MICROPHENOS* Groundmass - PLAGIOCLASE ( 25%) Size(mm): 0.1-0.5 Morphology: BLADED,SKELETAL LATHS APPROX COMP AN70; CLINOPYROXENE ( 45%) Size(mm): <0.2 Morphology: GRANULAR AUGITE,QUENCH; MAGNETITE ( 10%) Size(mm): <0.04 TI-MAGN* Alteration - CLAY MINERALS ( 15%) Replacing: CPX,PLAG,OL MICROPHENOS BROWN,PSEUDOMORPHS AFTER OL* Leg : 61 Top/Bottom Interval(mm): 780/ 800 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 738.00 Rock Type: IGNEOUS Core: 46 Sample Midpoint(m) : 740.29 Sect/Pc #: 2/PCE 3A ROCK = PLAG-OL MICROPHYRIC BASALT; Texture: MICROPHYRIC,FINE GRAINED,EQUIGRANULAR; Where sampled: SILL INTERIOR* Phenocrysts- OLIVINE ( 5%) Size(mm): 0.2-0.4 MICROPHENOS,RELECTS,PARTLY PSEUDOMORPHED BY CLAY, SOME FRESH; PLAGIOCLASE ( 10%) Size(mm): 0.3-0.6 APPROX COMP AN65; SPINEL ( TR%) Size(mm): 0.003 INCLUSIONS IN OL,MICROPHENOS* Groundmass - PLAGIOCLASE ( 20%) Size(mm): TO 1.0 Morphology: LATHS APPROX COMP AN65-70; CLINOPYROXENE ( 40%) Size(mm): <0.1 Morphology: GRANULAR AUGITE; MAGNETITE ( 10%) Size(mm): <0.08 TI-MAGN* Alteration - CLAY MINERALS ( 15%) Replacing: CPX,OL MICROPHENOS BROWN,PSEUDOMORPHS AFTER OL (SOME OL STILL FRESH), REPLACING CPX ETC* Leg : 61 Top/Bottom Interval(mm): 1110/1140 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 738.00 Rock Type: IGNEOUS Core: 46 Sample Midpoint(m) : 743.63 Sect/Pc #: 4/PCE 2B ROCK = OL-CPX-PLAG MICROPHYRIC BASALT; Texture: MICROPHYRIC,MIXED INTERSERTAL AND INTERGRANULAR; Where sampled: SILL INTERIOR* Phenocrysts- OLIVINE ( 10%) Size(mm): 0.3-0.5 BROWN CLAY,MICROPHENOS; PLAGIOCLASE ( 2%) Size(mm): 0.2-0.4 APPROX COMP AN75,MICROPHENOS; CLINOPYROXENE ( 5%) Size(mm): 0.1-0.2 AUGITE,MICROPHENOS; SPINEL ( TR%) Size(mm): <0.003 INCLUSIONS IN OL PSEUDOMORPHS,MICROPHENOS* Groundmass - PLAGIOCLASE ( 25%) Size(mm): 0.2-0.4 Morphology: SUBHEDRAL,LATHS APPROX COMP AN70; CLINOPYROXENE ( 35%) Size(mm): 0.1-0.2 Morphology: GRANULAR,SUBHEDRAL AUGITE; MAGNETITE ( 8%) Size(mm): 0.08 TI-MAGN* Alteration - CLAY MINERALS ( 15%) Location: PATCHES,VEINS Replacing: OL MICROPHENOS BROWN,PSEUDOMORPHS AFTER OL,THE ROCK IN GENERAL IS REPLACED* Leg : 61 Top/Bottom Interval(mm): 900/ 920 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 738.00 Rock Type: IGNEOUS Core: 46 Sample Midpoint(m) : 744.91 Sect/Pc #: 5/PCE 4 ROCK = OL-PLAG MODERATELY MICROPHYRIC BASALT; Texture: MODERATELY MICROPHYRIC,FINE GRAINED,MIXED HYALOPILITIC AND INTERSERTAL; Where sampled: SILL MARGINAL ZONE* Phenocrysts- OLIVINE ( 4%) Size(mm): 0.1-0.2 CLAY PSEUDOMORPHS,MICROPHENOS; PLAGIOCLASE ( 3%) Size(mm): 0.2-0.3 Morphology: SUBHEDRAL APPROX COMP AN70,MICROPHENOS; SPINEL ( TR%) Size(mm): <0.02 INCLUSIONS IN OL PSEUDOMORPHS,MICROPHENOS* Groundmass - PLAGIOCLASE ( 15%) Size(mm): 0.3-0.5 Morphology: THIN ACICULAR LATHS APPROX COMP AN70; CLINOPYROXENE ( 68%) Morphology: GRANULES QUENCH AND VERY FINE GRANULES; MAGNETITE ( 10%) Size(mm): <0.01 TI-MAGN; GLASS ( 5%) ALTERED TO SMEC* Alteration - AMPHIBOLE Replacing: OL BROWN; CLAY MINERALS ( 5%) Replacing: CPX,PLAG,GLASS,OL BROWN,PSEUDOMORPHS AFTER OL* Leg : 61 Top/Bottom Interval(mm): 880/ 900 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 747.00 Rock Type: IGNEOUS Core: 47 Sample Midpoint(m) : 747.89 Sect/Pc #: 1/PCE 8 ROCK = APHYRIC BASALT CONTACT BETWEEN VARIOLITIC BASALT AND GLASSY BASALT; Texture: APHYRIC,VARIOLITIC,VITROPHYRIC; Where sampled: GLASSY MARGIN* Phenocrysts- OLIVINE ( TR%) Morphology: EUHEDRAL ALTERED TO ORANGE-BROWN CLAY IN GLASS,FRESH, AVERAGE SIZE= 0.7 MM; PLAGIOCLASE ( TR%) Groundmass - OLIVINE ( TR%) Size(mm): 0.04 Morphology: EQUIDIMENSIONAL ONLY IN GLASS; PLAGIOCLASE ( 5%) Size(mm): <0.01 Morphology: LATHS LATHS SHOW DISTINCT ALIGNMENT SUBPARALLEL TO CONTACT; MAGNETITE ( 0%) GLASS ( 95%) ALTERED MESOSTASIS* Alteration - CLAY MINERALS ( TR%) Replacing: OL ORANGE-BROWN; CLAY MINERALS ( 95%) Location: MESOSTASIS REDDISH BROWN PALAGONITE* Leg : 61 Top/Bottom Interval(mm): 980/1000 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 747.00 Rock Type: IGNEOUS Core: 47 Sample Midpoint(m) : 749.49 Sect/Pc #: 2/PCE 3 ROCK = MICRODOLERITE MORE COARSE GRAINED THAN PREVIOUS THIN SECTION; Texture: MICRODOLERITIC,SPINIFEX; Where sampled: PILLOW INTERIOR* Phenocrysts- OLIVINE ( 5%) Size(mm): 0.04-0.1 Morphology: SUBHEDRAL CLAY PSEUDOMORPHS; PLAGIOCLASE ( 25%) AVERAGE LENGTH= 0.2 MM,SMALL MICROLITES; CLINOPYROXENE ( 63%) Size(mm): <0.04 SPINIFEX AGGREGATES; MAGNETITE ( 7%) Morphology: DUST-LIKE Alteration - CLAY MINERALS ( 5%) Replacing: OL GREENISH BROWN PSEUDOMORPHS AFTER OL* Leg : 61 Top/Bottom Interval(mm): 1000/1020 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 756.00 Rock Type: IGNEOUS Core: 48 Sample Midpoint(m) : 757.01 Sect/Pc #: 1/PCE 3B ROCK = MICRODOLERITE MORE FINE GRAINED THAN PREVIOUS; Texture: MICRODOLERITIC WITH VARIOLITIC SPOTS; Where sampled: NEXT TO GLASSY MARGIN* Groundmass - OLIVINE ( 3%) Size(mm): 0.1-0.3 PLAGIOCLASE ( 49%) AVERAGE LENGTH= 0.3 MM,SMALL MICROLITES,OFTEN CHAINS OF ORIENTED MICROLITES; CLINOPYROXENE ( 38%) Size(mm): 0.04 Morphology: INTERGRANULAR SPINIFEX-LIKE; MAGNETITE ( 7%) Morphology: DUST-LIKE Alteration - CALCITE ( <1%) Location: VUGS CLAY MINERALS ( 10%) Location: VUGS Replacing: OL PSEUDOMORPHS* Vesicles - Size(mm): 1-4 Percent: 5 Location: GROUNDMASS Filling: CLAY.MIN, Shape: IRREGULAR Filling: CALCITE VUGS* Leg : 61 Top/Bottom Interval(mm): 1160/1180 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 756.00 Rock Type: IGNEOUS Core: 48 Sample Midpoint(m) : 757.17 Sect/Pc #: 1/PCE 3C ROCK = BASALT TO MICRODOLERITE CONTACT OF VARIOLITIC BASALT AND SPINIFEX MICRODOLERITE,THIN MICRODOLERITIC VEINS PENETRATE TO THE VARIOLITIC ROCK; Texture: VARIOLITIC,MICRODOLERITIC* Groundmass - OLIVINE ( TR%) IN BASALT; OLIVINE ( 2%) IN MICRODOLERITE; PLAGIOCLASE ( 2%) IN BASALT; PLAGIOCLASE ( 40%) IN MICRODOLERITE; CLINOPYROXENE ( 0%) IN BASALT; CLINOPYROXENE ( 49%) IN MICRODOLERITE,SPINIFEX AGGREGATES; MAGNETITE ( 0%) IN BASALT; MAGNETITE ( 7%) IN MICRODOLERITE; GLASS ( 98%) IN BASALT; GLASS ( 2%) IN MICRODOLERITE* Alteration - CLAY MINERALS ( 98%) VARIOLITIC BASALT; CLAY MINERALS ( 7%) MICRODOLERITE* Leg : 61 Top/Bottom Interval(mm): 1140/1160 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 756.00 Rock Type: IGNEOUS Core: 48 Sample Midpoint(m) : 760.15 Sect/Pc #: 3/PCE 3D ROCK = OL MODERATELY MICROPHYRIC BASALT; Texture: MODERATELY MICROPHYRIC,VARIOLITIC; Where sampled: NEXT TO GLASSY MARGIN* Phenocrysts- OLIVINE ( 3%) Size(mm): 0.1-0.6 Morphology: EUHEDRAL CLAY PSEUDOMORPHS,MICROPHENOS; PLAGIOCLASE ( TR%) Morphology: ELONGATE PRISMS Groundmass - PLAGIOCLASE ( 3%) Morphology: LATHS SLIGHTLY ALIGNED; CLINOPYROXENE ( 0%) MAGNETITE ( 5%) Size(mm): <0.02 Morphology: DUST-LIKE,THIN CHAINS DUST-LIKE THIN CHAINS ARE COMMON; GLASS ( 90%) SULFIDES ( TR%) Size(mm): 0.2 INTERSPHERULITE FILLING* Alteration - CLAY MINERALS ( 92%) Location: MESOSTASIS Replacing: GLASS,OL MICROPHENOS REDDISH BROWN PALAGONITE,PSEUDOMORPHS AFTER OL* Leg : 61 Top/Bottom Interval(mm): 520/ 540 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 756.00 Rock Type: IGNEOUS Core: 48 Sample Midpoint(m) : 761.03 Sect/Pc #: 4/PCE 2D ROCK = MICRODOLERITE MORE COARSE GRAINED THAN PREVIOUS,WITHOUT GLASS; Texture: MICRODOLERITIC; Where sampled: SILL INTERIOR* Phenocrysts- OLIVINE ( 2%) Morphology: EUHEDRAL AVERAGE SIZE= 0.2 MM,MICROPHENOS,CLAY PSEUDOMORPHS; PLAGIOCLASE ( TR%) Groundmass - PLAGIOCLASE ( 32%) AVERAGE LENGTH= 0.4 MM,APPROX COMP AN62, MICROLITES; CLINOPYROXENE ( 61%) Size(mm): 0.02-0.04 SPINIFEX-LIKE AGGREGATES; MAGNETITE ( 5%) Size(mm): 0.02-0.05 Morphology: DUST-LIKE GLASS ( 0%) Alteration - CLAY MINERALS ( 2%) Replacing: OL MICROPHENOS PSEUDOMORPHS AFTER OL* Leg : 61 Top/Bottom Interval(mm): 720/ 740 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 756.00 Rock Type: IGNEOUS Core: 48 Sample Midpoint(m) : 761.23 Sect/Pc #: 4/PCE 2F ROCK = OL SPARSELY MICROPHYRIC BASALT CONTACT BETWEEN FINE GRAINED AND MORE COARSE GRAINED VARIOLITIC BASALTS; Texture: VARIOLITIC; Where sampled: GLASSY MARGIN* Phenocrysts- OLIVINE ( 1%) Morphology: EUHEDRAL AVERAGE SIZE= 0.2 MM,MICROPHENOS,CLAY PSEUDOMORPHS,MICROPHENOS; PLAGIOCLASE ( <1%) Morphology: ELONGATE PRISMS AVERAGE LENGTH= 0.8 MM,APPROX COMP AN62-82* Groundmass - PLAGIOCLASE ( 2%) Size(mm): <0.02 Morphology: LATHS SLIGHT ALIGNMENT; CLINOPYROXENE ( 0%) MAGNETITE ( 0%) GLASS ( 96%) ALTERED MESOSTASIS* Alteration - CALCITE ( TR%) Location: VUGS CLAY MINERALS ( 96%) Location: MESOSTASIS Replacing: GLASS,OL MICROPHENOS PALAGONITE,PSEUDOMORPHS AFTER OL* Vesicles - Percent: 1 Location: ALONG CONTACT Filling: CLAY.MIN, Shape: IRREGULAR, Filling: CALCITE Shape: ELONGATE VUGS,0.4-1.0 MM LONG* Leg : 61 Top/Bottom Interval(mm): 550/ 570 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 765.00 Rock Type: IGNEOUS Core: 49 Sample Midpoint(m) : 765.56 Sect/Pc #: 1/PCE 8A ROCK = BASALT TO BASALTIC GLASS CONTACT BETWEEN GLASS AND VARIOLITIC BASALT; Texture: VITROPHYRIC,VARIOLITIC; Where sampled: GLASSY MARGIN* Phenocrysts- OLIVINE ( TR%) Size(mm): 0.1-0.2 Morphology: EUHEDRAL IN GLASS,FRESH,MICROPHENOS; OLIVINE ( 3%) Size(mm): 0.1-0.2 Morphology: EUHEDRAL IN BASALT,ALTERED,MICROPHENOS; PLAGIOCLASE ( 0%) IN GLASS; PLAGIOCLASE ( TR%) IN BASALT; SPINEL Size(mm): <0.02 INCLUSIONS IN OL,MICROPHENOS* Groundmass - PLAGIOCLASE ( 3%) Size(mm): <0.02 Morphology: LATHS IN BASALT; CLINOPYROXENE ( 1%) Size(mm): <0.02 IN BASALT,SPINIFEX-LIKE,NUCLEAR AROUND PLAG MICROPHENOS; MAGNETITE ( 0%) IN BASALT; GLASS ( 99%) THIS IS THE VITROPHYRIC PART,FRESH,MESOSTASIS; GLASS ( 93%) IN BASALT,ALTERED,MESOSTASIS* Alteration - CLAY MINERALS ( 93%) Location: MESOSTASIS Replacing: GLASS IN VARIOLITIC BASALT,PALAGONITE* Leg : 61 Top/Bottom Interval(mm): 830/ 850 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 765.00 Rock Type: IGNEOUS Core: 49 Sample Midpoint(m) : 765.84 Sect/Pc #: 1/PCE 8D ROCK = MICRODOLERITE; Texture: MICRODOLERITIC WITH SPINIFEX-LIKE SPOTS; Where sampled: SILL INTERIOR* Groundmass - OLIVINE ( 3%) Morphology: EUHEDRAL AVERAGE SIZE= 0.4 MM,CLAY PSEUDOMORPHS; PLAGIOCLASE ( 55%) AVERAGE LENGTH= 0.4 MM,SMALL MICROLITES; CLINOPYROXENE ( 38%) Morphology: EQUIDIMENSIONAL AVERAGE SIZE= 0.08 MM,SPINIFEX AGGREGATES; MAGNETITE ( 4%) Size(mm): 0.02 Alteration - CLAY MINERALS ( 3%) Replacing: OL PSEUDOMORPHS AFTER OL* Leg : 61 Top/Bottom Interval(mm): 700/ 720 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 765.00 Rock Type: IGNEOUS Core: 49 Sample Midpoint(m) : 768.71 Sect/Pc #: 3/PCE 4 ROCK = MICRODOLERITE MORE COARSE GRAINED THAN PREVIOUS; Texture: MICRODOLERITIC; Where sampled: SILL INTERIOR* Groundmass - OLIVINE ( 5%) Size(mm): 0.2-0.7 Morphology: EUHEDRAL DARK BROWN CLAY PSEUDOMORPHS; PLAGIOCLASE ( 45%) Morphology: COARSE,TABULAR AVERAGE LENGTH= 0.4 MM,APPROX COMP AN85, MICROLITES; CLINOPYROXENE ( 42%) Size(mm): 0.1-0.4 Morphology: INTERGRANULAR MAGNETITE ( 8%) Size(mm): 0.04-0.12 Morphology: INTERGRANULAR Alteration - CLAY MINERALS ( 5%) Replacing: OL DARK BROWN PSEUDOMORPHS AFTER OL* Leg : 61 Top/Bottom Interval(mm): 410/ 430 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 765.00 Rock Type: IGNEOUS Core: 49 Sample Midpoint(m) : 769.92 Sect/Pc #: 4/PCE 2B ROCK = MICRODOLERITE MORE FINE GRAINED THAN PREVIOUS WITH SPINIFEX SPOTS; Texture: MICRODOLERITIC; Where sampled: SILL INTERIOR* Phenocrysts- OLIVINE ( TR%) Size(mm): 0.4-1.2 Morphology: EUHEDRAL CLAY PSEUDOMORPHS; PLAGIOCLASE ( <1%) Morphology: TABULAR 0.4-1.0 MM LONG,APPROX COMP AN76-87* Groundmass - OLIVINE ( 2%) Size(mm): 0.1-0.4 Morphology: ANHEDRAL ALTERED; PLAGIOCLASE ( 56%) AVERAGE LENGTH= 0.1 MM,APPROX COMP AN62, MICROLITES; CLINOPYROXENE ( 36%) Size(mm): 0.04-0.1 Morphology: INTERGRANULAR SPINIFEX AGGREGATES; MAGNETITE ( 6%) Morphology: INTERGRANULAR AVERAGE SIZE= 0.06 MM* Alteration - CARBONATE ( TR%) IN CLAY PSEUDOMORPHS AFTER OL; CLAY MINERALS ( 5%) Replacing: OL PSEUDOMORPHS AFTER OL* Leg : 61 Top/Bottom Interval(mm): 710/ 730 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 774.00 Rock Type: IGNEOUS Core: 50 Sample Midpoint(m) : 776.22 Sect/Pc #: 2/PCE 1C ROCK = DOLERITE; Texture: SUBOPHITIC; Where sampled: SILL INTERIOR* Groundmass - PLAGIOCLASE ( 45%) Size(mm): 0.3-0.7 APPROX COMP AN76; CLINOPYROXENE ( 45%) Size(mm): 0.5-0.8 AUGITE; MAGNETITE ( 5%) Size(mm): <0.2 TI-MAGN* Alteration - CHLORITE ( \[%) Replacing: CPX CLAY MINERALS ( 5%) Replacing: CPX BROWN,REPLACING CPX ET AL* Leg : 61 Top/Bottom Interval(mm): 150/ 170 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 774.00 Rock Type: IGNEOUS Core: 50 Sample Midpoint(m) : 777.16 Sect/Pc #: 3/PCE 1A ROCK = DOLERITE; Texture: OPHITIC; Where sampled: SILL INTERIOR* Groundmass - PLAGIOCLASE ( 40%) Size(mm): 0.5-0.8 Morphology: EUHEDRAL-ANHEDRAL APPROX COMP AN65; CLINOPYROXENE ( 43%) Size(mm): 0.6-0.9 Morphology: PLATES AUGITE,OPHITIC PLATES; MAGNETITE ( 10%) Size(mm): <0.25 COMBINATION ( TR%) INCLUDES QUARTZ + ALK.SPAR GRANOPHYRIC AGGREGATES; AMPHIBOLE ( 2-3%) Alteration - COMBINATION ( 5%) Replacing: ALL.MINS INCLUDES CLAY + CHLORITE,BROWN* Leg : 61 Top/Bottom Interval(mm): 1090/1110 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 774.00 Rock Type: IGNEOUS Core: 50 Sample Midpoint(m) : 782.60 Sect/Pc #: 6/PCE 1K ROCK = DOLERITE EXACTLY LIKE 50-3 (15-17) EXCEPT FOR MORE AMPH + MORE GRANOPHYRES + MORE CHLORITE + COARSER GRAIN SIZE; Texture: GRANOPHYRIC,OPHITIC; Where sampled: SILL INTERIOR* Groundmass - PLAGIOCLASE ( 40%) Size(mm): 0.5-0.8 Morphology: EUHEDRAL+ANHEDRAL APPROX COMP AN65; CLINOPYROXENE ( 40%) Size(mm): 0.6-0.9 Morphology: PLATES AUGITE,OPHITIC PLATES; MAGNETITE ( 10%) Size(mm): <0.25 COMBINATION ( 3%) INCLUDES QUARTZ + ALK.SPAR GRANOPHYRIC AGGREGATES; AMPHIBOLE ( 2-3%) APATITE ( <1%) Alteration - COMBINATION ( 5%) Replacing: ALL.MINS INCLUDES CLAY + CHLORITE (MORE CHLORITE THAN IN PREVIOUS THIN SECTION),BROWN* Leg : 61 Top/Bottom Interval(mm): 200/ 220 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 778.50 Rock Type: IGNEOUS Core: 51 Sample Midpoint(m) : 778.71 Sect/Pc #: 1/PCE 1C ROCK = MICRODOLERITE; Texture: MICRODOLERITIC; Where sampled: SILL INTERIOR* Groundmass - OLIVINE ( 2%) Morphology: EUHEDRAL,ANHEDRAL AVERAGE SIZE= 0.2 MM,ALTERED; PLAGIOCLASE ( 45%) APPROX COMP AN60-68,MICROLITES* CLINOPYROXENE ( 46%) Morphology: EQUIDIMENSIONAL,IRREGULAR AVERAGE SIZE= 0.2 MM,MORE COARSE; MAGNETITE ( 7%) Morphology: INTERGRANULAR AVERAGE SIZE 0.1 MM; COMBINATION ( TR%) Size(mm): 0.08 Morphology: INTERGRANULAR INCLUDES QUARTZ + ALK.SPAR IN GRANOPHYRIC AGGREGATE AND AS AUTONOMOUSE GRAINS; SULFIDE ( TR%) Size(mm): 0.15 Morphology: ELONGATE PLATES PROBABLY PYRITE* Alteration - CLAY MINERALS ( 5%) Replacing: OL,PLAG GRAYISH GREEN,PSEUDOMORPHS AFTER OL?* Leg : 61 Top/Bottom Interval(mm): 1470/1500 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 778.50 Rock Type: IGNEOUS Core: 51 Sample Midpoint(m) : 782.99 Sect/Pc #: 3/PCE 1L ROCK = MICRODOLERITE TO BASALT GRADUAL TRANSITION FROM MICRODOLERITE TO A HORNFELSIC-LIKE ROCK; Texture: MICRODOLERITIC-EQUIGRANULAR (MOSAIC),QUENCH; Where sampled: GLASSY SILL BOTTOM* Phenocrysts- OLIVINE ( 1%) Morphology: EUHEDRAL IN BASALT,AVERAGE SIZE= 0.2 MM,MICROPHENOS, ALTERED; PLAGIOCLASE ( TR%) IN BASALT,AVERAGE LENGTH= 0.4 MM,MICROPHENOS* Groundmass - OLIVINE ( 1%) Morphology: EUHEDRAL,IRREGULAR IN BASALT,AVERAGE SIZE= <0.04 MM; OLIVINE ( 2%) Morphology: EUHEDRAL IN MICRODOLERITE,AVERAGE SIZE= 0.3 MM; PLAGIOCLASE ( 31%) Morphology: LATHS,EQUIDIMENSIONAL IN BASALT,AVERAGE LENGTH= <0.02 MM,SMALL MICROLITES; PLAGIOCLASE ( 55%) Morphology: LATHS,EQUIDIMENSIONAL IN MICRODOLERITE,AVERAGE LENGTH= 0.3 MM,SMALL MICROLITES; CLINOPYROXENE ( 60%) Morphology: EQUIDIMENSIONAL IN BASALT,AVERAGE SIZE= <0.02 MM,POIKILOPHITIC AGGREGATES; CLINOPYROXENE ( 38%) Morphology: EQUIDIMENSIONAL IN MICRODOLERITE,AVERAGE SIZE= 0.1 MM, POIKILOPHITIC AGGREGATES; MAGNETITE ( 8%) Morphology: DUST-LIKE IN BASALT,AVERAGE SIZE= 0.04-0.12 MM; MAGNETITE ( 5%) Morphology: DUST-LIKE IN MICRODOLORITE,AVERAGE SIZE= 0.04-0.12 MM; GLASS ( 0%) IN BASALT; GLASS ( 0%) IN MICRODOLORITE* Alteration - CLAY MINERALS ( 5%) Replacing: OL GRAYISH GREENISH BROWN,PSEUDOMORPHS AFTER OL* Leg : 61 Top/Bottom Interval(mm): 50/ 70 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 778.50 Rock Type: IGNEOUS Core: 51 Sample Midpoint(m) : 783.06 Sect/Pc #: 4/PCE 1A ROCK = MICRODOLERITE; Texture: MICRODOLERITIC; Where sampled: SILL BOTTOM* Phenocrysts- OLIVINE ( 2%) Size(mm): 0.2-0.5 Morphology: EUHEDRAL ALTERED,MICROPHENOS; PLAGIOCLASE ( TR%) 0.5 MM LONG* Groundmass - OLIVINE ( 1%) Size(mm): <0.04 Morphology: IRREGULAR ALTERED; PLAGIOCLASE ( 40%) AVERAGE LENGTH= 0.16 MM,SMALL MICROLITES,DISTINCT ALIGNMENT IS OBSERVED; CLINOPYROXENE ( 54%) Morphology: EQUIDIMENSIONAL AVERAGE SIZE= 0.04 MM; MAGNETITE ( 5%) Size(mm): <0.04 Morphology: DUST-LIKE Alteration - CLAY MINERALS ( 5%) Replacing: OL,PLAG PSEUDOMORPHS* Leg : 61 Top/Bottom Interval(mm): 510/ 540 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 787.50 Rock Type: IGNEOUS Core: 52 Sample Midpoint(m) : 789.53 Sect/Pc #: 2/PCE 1 ROCK = DOLERITE ALTERED; Texture: DIABASIC; Where sampled: SILL INTERIOR* Groundmass - OLIVINE ( 5%) Size(mm): 0.2-0.3 PSEUDOMORPHS (POSSIBLY COULD BE CPX PSEUDOMORPHS); PLAGIOCLASE ( 40%) Size(mm): 0.2-0.5 Morphology: SUBHEDRAL APPROX COMP AN65-68; CLINOPYROXENE ( 40%) Size(mm): 0.3-0.5 AUGITE,OPHITIC TEXTURE; MAGNETITE ( 5%) Size(mm): 0.04 TI-MAGN* Alteration - CLAY MINERALS ( 10%) Location: PATCHES Replacing: OL GREEN CLAY PSEUDOMORPHS AFTER OL? OR IN VARIOLITIC INTERSTITIAL PATCHES* Leg : 61 Top/Bottom Interval(mm): 490/ 510 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 787.50 Rock Type: IGNEOUS Core: 52 Sample Midpoint(m) : 792.50 Sect/Pc #: 4/PCE 2 ROCK = OL-PLAG MODERATELY PHYRIC BASALT; Texture: MODERATELY PORPHYRITIC,FINE GRAINED, HYALOPILITIC; Where sampled: NEAR CHILL ZONE OF PILLOW* Phenocrysts- OLIVINE ( 3%) Size(mm): 0.2-0.9 ZEOLITE + CLAY + AMPH PSEUDOMORPHS; PLAGIOCLASE ( 1%) Size(mm): 0.3-0.8 Morphology: EUHEDRAL APPROX COMP AN70; SPINEL ( TR%) Size(mm): <0.004 INCLUSIONS IN OL PSEUDOMORPHS* Groundmass - PLAGIOCLASE ( 10%) Size(mm): TO 0.7 Morphology: THIN SKELETAL LATHS IN GROUNDMASS; CLINOPYROXENE ( 46%) QUENCH BUNDLES IN GROUNDMASS,MICROLITES; MAGNETITE ( 10%) Size(mm): <0.004 Morphology: DUST-LIKE TI-MAGN* GLASS ( 30%) DEVITRIFIED AND/OR REPLACED BY BROWN CLAY* Alteration - CLAY MINERALS ( 2%) Replacing: OL PHENOS PSEUDOMORPHS,GLASS IS DEVITRIFIED AND/OR REPLACED BY BROWN CLAY; ZEOLITE ( 2%) Replacing: OL PHENOS PSEUDOMORPHS; OTHER Replacing: OL PHENOS AMPH OR HYDROMICA PSEUDOMORPHS* Leg : 61 Top/Bottom Interval(mm): 690/ 710 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 801.00 Rock Type: IGNEOUS Core: 55 Sample Midpoint(m) : 801.70 Sect/Pc #: 1/PCE 6 ROCK = PLAG-OL MODERATELY PHYRIC BASALT; Texture: MODERATELY PORPHYRITIC,VARIOLITIC-HYALOPILITIC, GLASSY-FINE GRAINED; Where sampled: GLASSY PILLOW MARGIN* Phenocrysts- OLIVINE ( 2%) Size(mm): 0.1-0.2 CLAY + ZEOLITE PSEUDOMORPHS,MICROPHENOS; PLAGIOCLASE ( 2%) Size(mm): 0.2-0.9 APPROX COMP AN75-70; SPINEL ( TR%) Size(mm): <0.003 INCLUSIONS IN OL PSEUDOMORPHS* Groundmass - PLAGIOCLASE Morphology: SKELETAL VARIABLE PERCENTAGE,MICROLITES IN GROUNDMASS; CLINOPYROXENE VARIABLE PERCENTAGE,QUENCH TEXTURED BUNDLES IN GROUNDMASS; GLASS VARIABLE PERCENTAGE,VARIABLY DEVITRIFIED OR REPLACED BY CLAYS* Alteration - CLAY MINERALS Replacing: PLAG,OL MICROPHENOS,GLASS PERCENTAGE VARIABLE,PSEUDOMORPHS AFTER OL,GLASS IS VARIOUSLY DEVITRIFIED OR REPLACED BY CLAYS; ZEOLITE Replacing: PLAG,OL MICROPHENOS,GLASS PERCENTAGE VARIABLE,PSEUDOMORPHS AFTER OL; CHLORITE Replacing: PLAG,OL MICROPHENOS,GLASS Leg : 61 Top/Bottom Interval(mm): 650/ 680 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 806.50 Rock Type: IGNEOUS Core: 56 Sample Midpoint(m) : 807.17 Sect/Pc #: 1/PCE 6 ROCK = MICRODOLERITE WITH SPINIFEX SPOTS; Texture: MICRODOLERITIC; Where sampled: SILL INTERIOR* Phenocrysts- OLIVINE ( 5%) Morphology: EUHEDRAL AVERAGE SIZE= 0.3 MM,MICROPHENOS,ALTERED; PLAGIOCLASE ( TR%) Morphology: ELONGATE PRISMS AVERAGE LENGTH= 0.4 MM,MICROPHENOS,APPROX COMP AN67; CLINOPYROXENE ( TR%) Morphology: TABULAR AVERAGE SIZE= 0.3 MM,MICROPHENOS,POIKILITIC TABLES SURROUNDED BY FINE-MEDIUM GRAINED AGGREGATES* Alteration - CLAY MINERALS ( 5%) Replacing: OL MICROPHENOS PSEUDOMORPHS AFTER OL* Leg : 61 Top/Bottom Interval(mm): 1450/1470 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 806.50 Rock Type: IGNEOUS Core: 56 Sample Midpoint(m) : 807.96 Sect/Pc #: 1/PCE 4L ROCK = APHYRIC BASALT; Texture: APHYRIC,VARIOLITIC-INTERSERTAL; Where sampled: GLASSY SILL BOTTOM* Groundmass - OLIVINE ( 1%) AVERAGE SIZE= 0.1 MM,GLOMEROPORPHYRITIC CLUSTERS; PLAGIOCLASE ( 5%) Size(mm): <0.02 Morphology: LATHS CLINOPYROXENE ( TR%) MAGNETITE ( 5%) Size(mm): <0.02 Morphology: DUST-LIKE GLASS ( 89%) ALTERED MESOSTASIS* Alteration - CLAY MINERALS ( 90%) Location: MESOSTASIS Replacing: GLASS PROBABLY PALAGONITE* Leg : 61 Top/Bottom Interval(mm): 960/ 980 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 806.50 Rock Type: IGNEOUS Core: 56 Sample Midpoint(m) : 808.97 Sect/Pc #: 2/PCE 9 ROCK = ZEOLITE VEIN IN GLASS; Alteration - CLAY MINERALS ( 15%) Location: VEIN MARGINS Replacing: GLASS,ZEOLITES ZEOLITE ( 85%) Location: VEIN INTERIOR REPLACING VEIN INFILLING,CRYSTALLINE AND FIBROUS* Leg : 61 Top/Bottom Interval(mm): 1070/1090 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 806.50 Rock Type: IGNEOUS Core: 56 Sample Midpoint(m) : 809.08 Sect/Pc #: 2/PCE 10 ROCK = GLASS TO BASALT CONTACT OF GLASS AND VARIOLITIC BASALT; Texture: SPARSELY PORPHYRITIC,VARIOLITIC,VITROPHYRIC* Phenocrysts- OLIVINE ( 1%) Morphology: EUHEDRAL AVERAGE SIZE= 0.2 MM,MICROPHENOS,ALTERED; PLAGIOCLASE ( 1%) AVERAGE LENGTH= 0.5 MM; SPINEL ( TR%) INCLUSIONS IN OL* Groundmass - PLAGIOCLASE ( 5%) Size(mm): <0.02 Morphology: LATHS MAGNETITE ( 0%) GLASS ( 95%) MESOSTASIS,ALTERED IN VARIOLITIC BASALT AND FRESH IN VITROPHYRE* Alteration - CLAY MINERALS ( 93%) Location: MESOSTASIS Replacing: GLASS PROBABLY PALAGONITE,ALTERED IN VARIOLITIC BASALT AND FRESH IN VITROPHYRIC BASALT* Leg : 61 Top/Bottom Interval(mm): 1460/1480 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 815.50 Rock Type: IGNEOUS Core: 57 Sample Midpoint(m) : 816.97 Sect/Pc #: 1/PCE 13 ROCK = OL MODERATELY MICROPHYRIC BASALT; Texture: MODERATELY MICROPHYRIC,FINE GRAINED, INTERSERTAL-EQUIGRANULAR; Where sampled: SILL OR FLOW INTERIOR* Phenocrysts- OLIVINE ( 4%) Size(mm): 0.1-0.2 CLAY + ZEOLITE PSEUDOMORPHS,MICROPHENOS; PLAGIOCLASE ( TR%) Size(mm): 0.2-0.3 Morphology: EUHEDRAL,SKELETAL APPROX COMP AN70,MICROPHENOS; SPINEL Size(mm): <0.003 INCLUSIONS IN OL PSEUDOMORPHS* Groundmass - PLAGIOCLASE ( 25%) Size(mm): <0.2 Morphology: SKELETAL LATHS MICROLITES; CLINOPYROXENE ( 56%) Size(mm): TO 0.1 Morphology: BUNDLES,GRANULES AUGITE,QUENCH; MAGNETITE ( 10%) Size(mm): <0.01 TI-MAGN; GLASS ( 5-10%) Alteration - CLAY MINERALS ( 5%) Replacing: GLASS,OL MICROPHENOS,PLAG PSEUDOMORPHS AFTER OL; ZEOLITE Replacing: GLASS,OL MICROPHENOS,PLAG PERCENTAGE VARIABLE,PSEUDOMORPHS AFTER OL; CHLORITE Replacing: GLASS,OL MICROPHENOS,PLAG PERCENTAGE VARIABLE* Leg : 61 Top/Bottom Interval(mm): 190/ 210 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 824.50 Rock Type: IGNEOUS Core: 58 Sample Midpoint(m) : 826.20 Sect/Pc #: 2/PCE 2 ROCK = APHYRIC BASALT ALTERED; Texture: APHYRIC,INTERSERTAL-EQUIGRANULAR; Where sampled: SILL INTERIOR* Phenocrysts- OLIVINE ( <1%) Size(mm): 0.1-0.2 CLAY + CHLORITE PSEUDOMORPHS,MICROPHENOS; PLAGIOCLASE ( <1%) Size(mm): 0.1-0.3 CLAY PSEUDOMORPHS,MICROPHENOS; CLINOPYROXENE ( <1%) Size(mm): 0.1-0.2 Morphology: ANHEDRAL AUGITE,MICROPHENOS* Groundmass - PLAGIOCLASE ( 20%) Morphology: SKELETAL LATHS <0.5 MM LONG,IN GROUNDMASS; CLINOPYROXENE ( 58%) Morphology: SPRAYS,GRANULES QUENCH; MAGNETITE ( 7%) Size(mm): <0.1 TI-MAGN* Alteration - COMBINATION ( 15%) Location: VEINS Replacing: ALL.MINS INCLUDES CLAY + CHLORITE,BROWN CLAY REPLACES EVERYTHING AND GREEN CLAY IS IN VEINS,PSEUDOMORPHS AFTER OL + PLAG* Leg : 61 Top/Bottom Interval(mm): 410/ 430 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 824.50 Rock Type: IGNEOUS Core: 58 Sample Midpoint(m) : 827.92 Sect/Pc #: 3/PCE 2B ROCK = DOLERITE ALTERED; Texture: SUBOPHITIC; Where sampled: SILL INTERIOR* Phenocrysts- OLIVINE ( TR%) Size(mm): 0.1 POSSIBLE CLAY PSEUDOMORPHS OF OL (COULD BE CPX PSEUDOMORPHS)* Groundmass - PLAGIOCLASE ( 30%) Size(mm): 0.1-0.3 Morphology: SUBHEDRAL,LATHS APPROX COMP AN57; CLINOPYROXENE ( 48%) Size(mm): 0.1-0.2 AUGITE,SUBOPHITIC; MAGNETITE ( 7%) Size(mm): <0.1 Morphology: SKELETAL TI-MAGN* Alteration - CLAY MINERALS ( 15%) Replacing: CPX GREEN CLAY REPLACING CPX (MOSTLY) BUT COULD BE SOME PSEUDOMORPHS AFTER OL MICROPHENOS* Leg : 61 Top/Bottom Interval(mm): 1320/1340 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 833.50 Rock Type: IGNEOUS Core: 59 Sample Midpoint(m) : 837.83 Sect/Pc #: 3/PCE 2 ROCK = PLAG-OL SPARSELY MICROPHYRIC BASALT; Texture: SPARSELY MICROPHYRIC,OPHITIC; Where sampled: SILL INTERIOR* Phenocrysts- OLIVINE ( 1%) Size(mm): 0.1-0.5 CLAY-CALCITE PSEUDOMORPHS,MICROPHENOS; PLAGIOCLASE ( 1%) Size(mm): 0.2-0.6 Morphology: SUBHEDRAL,LATHS MICROPHENOS* Groundmass - PLAGIOCLASE ( 40%) Size(mm): 0.1-0.2 Morphology: SUBHEDRAL APPROX COMP AN60; CLINOPYROXENE ( 43%) Size(mm): <0.2 Morphology: GRANULES,SUBHEDRAL AUGITE; MAGNETITE ( 5%) Size(mm): <0.1 TI-MAGN; COMBINATION ( TR%) INCLUDES QUARTZ + ALK.SPAR GRANOPHYRES PERHAPS; APATITE ( TR%) Morphology: ACICULAR MASSES OF ACICULAR XTLS IN INTERSTITIAL FE-RICH REGION* Alteration - CALCITE Replacing: OL MICROPHENOS PERCENTAGE VARIABLE,CLAY-CALCITE PSEUDOMORPHS AFTER OL; CLAY MINERALS ( 10%) Replacing: CPX BROWN AND GREEN CLAY REPLACING CPX (MOSTLY)* Leg : 61 Top/Bottom Interval(mm): 1080/1110 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 833.50 Rock Type: IGNEOUS Core: 59 Sample Midpoint(m) : 842.10 Sect/Pc #: 6/PCE 7 ROCK = PLAG-CPX SPARSELY MICROPHYRIC BASALT ALTERED; Texture: SPARSELY MICROPHYRIC,MIXED INTERSERTAL + INTERGRANULAR; Where sampled: FLOW INTERIOR* Phenocrysts- OLIVINE ( TR%) Size(mm): 0.1-0.3 PSEUDOMORPHS (MAY BE CPX),MICROPHENOS; PLAGIOCLASE ( 1%) Size(mm): 0.2-0.5 APPROX COMP AN68,MICROPHENOS; CLINOPYROXENE ( <1%) Size(mm): 0.1-0.3 AUGITE,MICROPHENOS* Groundmass - PLAGIOCLASE Size(mm): 0.1-0.2 Morphology: SUBHEDRAL-ANHEDRAL APPROX COMP AN65; CLINOPYROXENE Size(mm): <0.1-0.15 Morphology: GRANULES QUENCH PHASE AND GRANULES,AUGITE; MAGNETITE ( 5%) Size(mm): <0.005 Morphology: GRANULES TI-MAGN* Alteration - CLAY MINERALS ( 10%) Replacing: ALL.MINS BROWN CLAY REPLACING EVERYTHING* Leg : 61 Top/Bottom Interval(mm): 1310/1330 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 833.50 Rock Type: IGNEOUS Core: 59 Sample Midpoint(m) : 842.32 Sect/Pc #: 6/PCE 8 ROCK = PLAG-CPX MODERATELY MICROPHYRIC BASALT; Texture: MODERATELY MICROPHYRIC,VARIOLITIC; Where sampled: FLOW MARGIN* Phenocrysts- OLIVINE ( TR%) PSEUDOMORPHS MAY BE CPX; PLAGIOCLASE ( 1%) Size(mm): <0.2 Morphology: EUHEDRAL,TABULAR APPROX COMP AN65,MICROPHENOS; CLINOPYROXENE ( 1%) Size(mm): 0.1-0.15 Morphology: EUHEDRAL-SUBHEDRAL AUGITE,SECTOR ZONING,MICROPHENOS; SPINEL ( TR%) Size(mm): <0.003 INCLUSIONS IN PLAG* Groundmass - MAGNETITE ( 10%) Size(mm): 0.002 Morphology: DUST-LIKE TI-MAGN; GLASS ( 88%) GROUNDMASS IS VARIOLITIC,MOSTLY VERY FINE QUENCH, MOST REPLACED TO VARIABLE DEGREES BY CLAY,NO FRESH GLASS PRESENT* Alteration - AMPHIBOLE Replacing: CPX REPLACING CPX ET AL; CLAY MINERALS Location: QUENCH PHASES Replacing: GLASS,MICROPHENOS PERCENTAGE VARIABLE,REPLACING QUENCH PHASES + MICROPHENOS + GLASS* Leg : 61 Top/Bottom Interval(mm): 990/1010 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 842.50 Rock Type: IGNEOUS Core: 60 Sample Midpoint(m) : 846.50 Sect/Pc #: 3/PCE 4 ROCK = PLAG-OL SLIGHTLY MICROPHYRIC BASALT; Texture: SLIGHTLY MICROPHYRIC,HYALOPILITIC-INTERSERTAL; Where sampled: SILL BOTTOM* Phenocrysts- OLIVINE ( 1%) Morphology: EUHEDRAL AVERAGE SIZE= 0.3 MM,MICROPHENOS,ALTERED; PLAGIOCLASE ( 1%) AVERAGE LENGTH= 0.4 MM,MICROPHENOS,APPROX COMP AN85* Groundmass - PLAGIOCLASE ( 5%) Size(mm): <0.05 Morphology: LATHS CLINOPYROXENE ( 1%) Morphology: IRREGULAR AVERAGE SIZE 0.08 MM; MAGNETITE ( 3%) Morphology: DUST-LIKE AVERAGE SIZE= 0.06; GLASS ( 89%) ALTERED* Alteration - CLAY MINERALS ( 90%) Replacing: OL MICROPHENOS,GLASS GREENISH BROWN PSEUDOMORPHS AFTER OL AND REDDISH BROWN CLAY REPLACING GLASS* Leg : 61 Top/Bottom Interval(mm): 300/ 320 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 851.50 Rock Type: IGNEOUS Core: 61 Sample Midpoint(m) : 851.81 Sect/Pc #: 1/PCE 4 ROCK = VITROPHYRIC TO VARIOLITIC BASALT CONTACT OF VITROPHYRIC AND VARIOLITIC BASALTS, THIN (5.2 MM) BAND OF ENRICHMENT IN GLASS IS LOCATED IN VARIOLITIC BASALT IN CONTACT WITH GLASS; Texture: VARIOLITIC-VITROPHYRIC; Where sampled: TOP OF SILL* Groundmass - OLIVINE FRESH OL IN VITROPHYRIC BASALT; PLAGIOCLASE CLINOPYROXENE MAGNETITE PYRITE Alteration - CLAY MINERALS ( 95%) Replacing: GLASS ONLY REPLACING GLASS IN VARIOLITIC BASALT--GLASS IN THE VITROPHYRIC BASALT IS FRESH* Leg : 61 Top/Bottom Interval(mm): 160/ 180 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 851.50 Rock Type: IGNEOUS Core: 61 Sample Midpoint(m) : 854.67 Sect/Pc #: 3/PCE 1C ROCK = MICRODOLERITE; Texture: MICRODOLERITIC; Where sampled: SILL INTERIOR* Phenocrysts- OLIVINE ( 1%) Morphology: EUHEDRAL AVERAGE SIZE= 0.4 MM,MICROPHENOS; PLAGIOCLASE ( 1%) AVERAGE LENGTH= 0.6 MM,ZONED* Groundmass - PLAGIOCLASE ( 52%) AVERAGE LENGTH= 0.3 MM,SMALL MICROLITES; CLINOPYROXENE ( 39%) AVERAGE SIZE= 0.12 MM,INTERSTITIAL; MAGNETITE ( 7%) Morphology: IRREGULAR AVERAGE SIZE= 0.1 MM; GLASS ( 1%) PERCENTAGE UNCERTAIN* Alteration - CARBONATE ( TR%) Location: INTERSTITIAL Replacing: OL MICROPHENOS CLAY MINERALS ( 5%) Replacing: OL MICROPHENOS Leg : 61 Top/Bottom Interval(mm): 630/ 650 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 860.50 Rock Type: IGNEOUS Core: 62 Sample Midpoint(m) : 861.14 Sect/Pc #: 1/PCE 1E ROCK = PLAG-OL MODERATELY PHYRIC BASALT MORE FINE GRAINED THAN PREVIOUS,INTERSTICES OF GLASS SPOTS INFILLED BY MICRODOLERITIC AGGREGATES, GLOMEROPORPHYRITIC; Texture: MODERATELY PORPHYRITIC,INTERSERTAL- MICRODOLERITIC; Where sampled: BOUNDARY OF TWO SILLS* Phenocrysts- OLIVINE ( 1%) Morphology: ROUNDED AVERAGE SIZE= 0.2 MM,MICROPHENOS,ALTERED; PLAGIOCLASE ( 3%) Morphology: ELONGATE PRISMS,TABULAR AVERAGE LENGTH 1.2 MM,APPROX COMP 67-72,ZONED; CLINOPYROXENE Morphology: EQUIGRANULAR AVERAGE SIZE= 0.4 MM,MICROPHENOS* Groundmass - PLAGIOCLASE Morphology: LATHS PERCENTAGE VARIABLE,MICROLITES; CLINOPYROXENE Morphology: IRREGULAR MAGNETITE ( 0-5%) GLASS ( 80%) MESOSTASIS* Alteration - CLAY MINERALS ( 90%) Location: MESOSTASIS Replacing: GLASS,OL MICROPHENOS PSEUDOMORPHS* Leg : 61 Top/Bottom Interval(mm): 100/ 120 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 860.50 Rock Type: IGNEOUS Core: 62 Sample Midpoint(m) : 862.11 Sect/Pc #: 2/PCE 1A ROCK = MICRODOLERITE MORE COARSE GRAINED THAN PREVIOUS; Texture: MICRODOLERITIC,GLASSY; Where sampled: SILL INTERIOR NEAR TOP* Groundmass - OLIVINE ( 1%) Morphology: ROUNDED AVERAGE SIZE= 0.4 MM; PLAGIOCLASE ( 59%) AVERAGE LENGTH= 0.4 MM,MICROLITES; CLINOPYROXENE ( 32%) Morphology: EQUIDIMENSIONAL AVERAGE SIZE= 0.2 MM; MAGNETITE ( 5%) Morphology: DUST-LIKE AVERAGE SIZE= 0.08 MM; GLASS ( 3%) INTERSTITIAL* Alteration - CLAY MINERALS ( 5%) Location: INTERSTITIAL Replacing: GLASS,OL PSEUDOMORPHS* Leg : 61 Top/Bottom Interval(mm): 00/ 30 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 860.50 Rock Type: IGNEOUS Core: 62 Sample Midpoint(m) : 865.02 Sect/Pc #: 4/PCE 1 ROCK = PLAG-CPX MODERATELY MICROPHYRIC BASALT; Texture: MODERATELY MICROPHYRIC,VARIOLITIC; Where sampled: SILL TOP* Phenocrysts- OLIVINE ( TR%) Morphology: EUHEDRAL AVERAGE SIZE= 0.5 MM; PLAGIOCLASE ( 1%) AVERAGE LENGTH= 0.2 MM,MICROPHENOS; CLINOPYROXENE ( 1%) AVERAGE SIZE= 0.08 MM,MICROPHENOS* Alteration - CLAY MINERALS ( 95%) Location: MESOSTASIS Leg : 61 Top/Bottom Interval(mm): 190/ 210 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 864.50 Rock Type: IGNEOUS Core: 63 Sample Midpoint(m) : 864.70 Sect/Pc #: 1/PCE 2 ROCK = HYALOPILITIC BASALT TO MICRODOLERITE CONTACT OF HYALOPILITIC BASALT AND FINE GRAINED MICRODOLERITE,MICROINTRUSIONS OF MAGMA FROM INTERIOR TO CHILLED MARGIN OF SILL; Texture: HYALOPILITIC FINE GRAINED; Where sampled: GLASSY MARGIN* Phenocrysts- OLIVINE ( 2%) IN HYALOPILITIC BASALT; PLAGIOCLASE ( TR%) IN HYALOPILITIC BASALT; MAGNETITE Morphology: OCTAHEDRONS Alteration - CARBONATE CLAY MINERALS Leg : 61 Top/Bottom Interval(mm): 360/ 380 Describer: Shcheka, S.A. Hole: 462A Top of Core Depth(m) : 864.50 Rock Type: IGNEOUS Core: 63 Sample Midpoint(m) : 864.87 Sect/Pc #: 1/PCE 4A ROCK = VARIOLITIC TO HYALOPILITIC BASALT CONTACT OF VARIOLITIC AND HYALOPILITIC BASALTS, GLASSY SPOTTED ZONE ON CONTACT IS OBSERVED, INTERIORS OF SPOTS ARE INFILLED BY MICRODOLERITIC AGGREGATES; Texture: VARIOLITIC,HYALOPILITIC; Where sampled: GLASSY MARGIN* Groundmass - OLIVINE ( 2%) ONLY IN THE VARIOLITIC BASALT* Alteration - CLAY MINERALS ( 90%) Location: MESOSTASIS Replacing: GLASS,OL REDDISH BROWN* Vesicles - Percent: 0 Leg : 61 Top/Bottom Interval(mm): 200/ 220 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 869.50 Rock Type: IGNEOUS Core: 64 Sample Midpoint(m) : 869.71 Sect/Pc #: 1/PCE 1B ROCK = APHYRIC BASALT ALTERED; Texture: APHYRIC,MICRODOLERITIC; Where sampled: SILL INTERIOR* Groundmass - PLAGIOCLASE ( 38%) Size(mm): 0.2-0.4 APPROX COMP AN68-70; CLINOPYROXENE ( 40%) Size(mm): <0.2 AUGITE; MAGNETITE ( 5%) Size(mm): <0.08 Morphology: IRREGULAR TI-MAGN; GLASS ( 7%) SMALL INTERSTITIAL PATCHES (ALTERED)* Alteration - CLAY MINERALS ( 10%) Replacing: GLASS,CPX BROWN* Leg : 61 Top/Bottom Interval(mm): 1220/1250 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 869.50 Rock Type: IGNEOUS Core: 64 Sample Midpoint(m) : 870.74 Sect/Pc #: 1/PCE 1E ROCK = DOLERITE ALTERED; Texture: MICRODIABASIC; Where sampled: FINE GRAINED ZONE OF SILL INTERIOR* Groundmass - PLAGIOCLASE ( 40%) Size(mm): 0.2-0.4 Morphology: SUBHEDRAL APPROX COMP AN68-71; CLINOPYROXENE ( 45%) Size(mm): 0.1-0.2 Morphology: SUBHEDRAL AUGITE; MAGNETITE ( 5%) Size(mm): <0.08 Morphology: SKELETAL TI-MAGN* Alteration - CLAY MINERALS ( 10%) Replacing: CPX BROWN* Leg : 61 Top/Bottom Interval(mm): 600/ 620 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 869.50 Rock Type: IGNEOUS Core: 64 Sample Midpoint(m) : 871.61 Sect/Pc #: 2/PCE 1C ROCK = DOLERITE ALTERED; Texture: SUBOPHITIC; Where sampled: SILL INTERIOR* Groundmass - PLAGIOCLASE ( 35%) Size(mm): 0.3-0.4 Morphology: SUBHEDRAL APPROX COMP AN75-77; CLINOPYROXENE ( 45%) Size(mm): 0.2-0.35 Morphology: SUBHEDRAL AUGITE; MAGNETITE ( 5%) Size(mm): <0.1 TI-MAGN; GLASS ( 5%) INTERSTITIAL PATCHES* Alteration - CLAY MINERALS ( 15%) Replacing: CPX,GLASS BROWN* Leg : 61 Top/Bottom Interval(mm): 300/ 320 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 869.50 Rock Type: IGNEOUS Core: 64 Sample Midpoint(m) : 874.31 Sect/Pc #: 4/PCE 1B ROCK = APHYRIC BASALT ALTERED; Texture: APHYRIC,MIXED EQUIGRANULAR + MICRODIABASIC; Where sampled: FINE GRAINED ZONE OF SILL INTERIOR* Phenocrysts- OLIVINE ( <1%) Size(mm): 0.3-0.5 CLAY PSEUDOMORPHS,MICROPHENOS; PLAGIOCLASE ( <1%) Size(mm): 0.3-0.5 APPROX COMP AN64-66,MICROPHENOS; CLINOPYROXENE ( <1%) Size(mm): 0.5-0.2 AUGITE,MICROPHENOS* Groundmass - PLAGIOCLASE ( 40%) Size(mm): <0.2 Morphology: SUBHEDRAL APPROX COMP AN65; CLINOPYROXENE ( 43%) Size(mm): <0.2 Morphology: SUBHEDRAL AUGITE; MAGNETITE ( 10%) Size(mm): <0.04 TI-MAGN* Alteration - CLAY MINERALS ( 7%) Replacing: ALL.MINS BROWN CLAY REPLACING EVERYTHING,PSEUDOMORPHS AFTER OL* Leg : 61 Top/Bottom Interval(mm): 600/ 620 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 876.50 Rock Type: IGNEOUS Core: 65 Sample Midpoint(m) : 878.61 Sect/Pc #: 2/PCE 1 ROCK = DOLERITE ALTERED; Texture: SUBOPHITIC; Where sampled: SILL INTERIOR* Phenocrysts- OLIVINE ( TR%) Size(mm): 0.3-0.5 CLAY PSEUDOMORPHS WHICH COULD BE CPX,MICROPHENOS* Groundmass - PLAGIOCLASE ( 40%) Size(mm): 0.2-0.4 Morphology: SUBHEDRAL-EUHEDRAL APPROX COMP AN63; CLINOPYROXENE ( 45%) Size(mm): 0.2-0.4 Morphology: SUBHEDRAL AUGITE; MAGNETITE ( 5%) Size(mm): <0.1 Morphology: SKELETAL TI-MAGN; GLASS ( 2%) INTERSTITIAL PATCHES* Alteration - CLAY MINERALS ( 10%) POSSIBLE PSEUDOMORPHS AFTER OL MICROPHENOS (COULD BE CPX)* Leg : 61 Top/Bottom Interval(mm): 200/ 220 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 883.00 Rock Type: IGNEOUS Core: 66 Sample Midpoint(m) : 883.21 Sect/Pc #: 1/PCE 1 ROCK = PLAG-CPX MODERATELY MICROPHYRIC BASALT MASSIVE BASALT SILL; Texture: MODERATELY MICROPHYRIC,SUBOPHITIC-INTERGRANULAR; Where sampled: NEAR SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 5-6%) Size(mm): 0.4-0.5 Morphology: TABULAR,PRISMATIC APPROX COMP AN65,MICROPHENOS; CLINOPYROXENE ( 3-4%) Size(mm): 0.4 Morphology: SUBHEDRAL SOME TYPES ARE PALE GREENISH,MICROPHENOS* Groundmass - PLAGIOCLASE ( 40%) Size(mm): 0.3 Morphology: SUBHEDRAL MICROLITES; CLINOPYROXENE ( 45%) Size(mm): 0.3 Morphology: SUBHEDRAL MICROLITES; MAGNETITE ( 3-5%) Size(mm): <0.2 Morphology: SKELETAL,DUST-LIKE TWO TYPES: 1)LARGE SKELETAL (THIS TYPE IS CLOSELY ASSOCIATED WITH ALTERED ZONE AND MAY BE SECONDARY) AND 2)SMALL DUST-LIKE* Alteration - CALCITE Location: VEIN MARGINS ZEOLITE Location: VEIN INTERIOR CLAY MINERALS ( 5-10%) Location: VEINS Replacing: PLAG,CPX SOMETIMES IN BETWEEN CALCITE AND ZEOLITE IN VEINS* Leg : 61 Top/Bottom Interval(mm): 330/ 350 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 883.00 Rock Type: IGNEOUS Core: 66 Sample Midpoint(m) : 892.34 Sect/Pc #: 7/PCE 1B ROCK = DOLERITE MASSIVE DOLERITE SILL; Texture: SUBOPHITIC-INTERGRANULAR; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 25%) Size(mm): 0.4-1.0 Morphology: TABULAR-PRISMATIC CLINOPYROXENE ( 15%) Size(mm): 0.5-1.0 Morphology: SUBHEDRAL MAGNETITE ( 3%) Morphology: SKELETAL Groundmass - PLAGIOCLASE ( 25%) Size(mm): <0.3 MICROLITES; CLINOPYROXENE ( 25%) Size(mm): <0.4 MICROLITES; MAGNETITE ( 3%) Size(mm): <0.2 Morphology: SKELETAL,DUST-LIKE COMBINATION ( 3-4%) INCLUDES QUARTZ + ALK.SPAR, INTERGROWN, FORMING MICROPEGMATITE,COEXISTS WITH SKELETAL MAGN; HORNBLENDE GREEN; APATITE Alteration - CLAY MINERALS ( 5-6%) Replacing: PLAG CHLORITE ( 1-3%) Location: SPOTS Replacing: CPX Leg : 61 Top/Bottom Interval(mm): 80/ 100 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 892.00 Rock Type: IGNEOUS Core: 67 Sample Midpoint(m) : 892.09 Sect/Pc #: 1/PCE 1B ROCK = DOLERITE MASSIVE DOLERITE SILL; Texture: OPHITIC-INTERGRANULAR; Where sampled: SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 15%) Size(mm): 0.8-1.2 Morphology: PRISMATIC APPROX COMP AN60; CLINOPYROXENE ( 30%) Size(mm): 0.8-1.2 Morphology: ANHEDRAL MAGNETITE ( 1-3%) Size(mm): 0.4-0.8 Morphology: SKELETAL Groundmass - PLAGIOCLASE ( 15%) Size(mm): <0.7 Morphology: PRISMATIC-TABULAR MICROLITES; CLINOPYROXENE ( 30%) Size(mm): <0.7 Morphology: ANHEDRAL-SUBHEDRAL MICROLITES; MAGNETITE ( 4%) Size(mm): <0.4 Morphology: SKELETAL,DUST-LIKE COMBINATION ( 4%) INCLUDES QUARTZ + ALK.SPAR, INTERGROWN, FORMING MICROPEGMATITE,COEXISTS WITH SKELETAL MAGN; HORNBLENDE ( TR%) GREEN; APATITE ( TR%) Alteration - CLAY MINERALS ( 5-10%) Location: SPOTS Replacing: PLAG CHLORITE ( 3-5%) Location: SPOTS Replacing: CPX CPX ALTERED TO CHLORITE + MAGN* Leg : 61 Top/Bottom Interval(mm): 1240/1260 Describer: Tokuyama, H. Hole: 462A Top of Core Depth(m) : 892.00 Rock Type: IGNEOUS Core: 67 Sample Midpoint(m) : 900.75 Sect/Pc #: 6/PCE 1I ROCK = DOLERITE MASSIVE DOLERITE SILL; Texture: SUBOPHITIC-INTERGRANULAR; Where sampled: NEAR SILL INTERIOR* Phenocrysts- OLIVINE ( TR%) Size(mm): 1 PSEUDOMORPH ALTERED TO CLAY; PLAGIOCLASE ( 5-6%) Size(mm): 0.4-0.5 Morphology: TABULAR,PRISMATIC APPROX COMP AN65,MICROPHENOS; CLINOPYROXENE ( 3-4%) Size(mm): 0.4 Morphology: SUBHEDRAL SOME TYPES ARE PALE GREENISH* Groundmass - OLIVINE ( 1-3%) Size(mm): <0.4 PSEUDOMORPH ALTERED TO CHLORITE,COEXISTS WITH MAGN; PLAGIOCLASE ( 40%) Size(mm): 0.3 Morphology: SUBHEDRAL MICROLITES; MAGNETITE ( 3-5%) Size(mm): <0.2 Morphology: SKELETAL,DUST-LIKE TWO TYPES: 1)LARGE SKELETAL (THIS TYPE IS CLOSELY ASSOCIATED WITH THE ALTERED ZONE AND MAY BE SECONDARY) AND 2)SMALL DUST-LIKE* Alteration - CLAY MINERALS ( 10%) Replacing: PLAG,OL PHENOS PSEUDOMORPHS AFTER OL PHENOS; CHLORITE ( 2-4%) Location: SPOTS Replacing: OL,CPX PSEUDOMORPHS AFTER GROUNDMASS OL* Leg : 61 Top/Bottom Interval(mm): 1160/1180 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 901.00 Rock Type: IGNEOUS Core: 68 Sample Midpoint(m) : 906.67 Sect/Pc #: 4/PCE 7 ROCK = DOLERITE ALTERED; Texture: SUBOPHITIC,FINE GRAINED; Where sampled: SILL INTERIOR* Groundmass - PLAGIOCLASE ( 40%) Size(mm): 0.2-0.4 APPROX COMP AN70; CLINOPYROXENE ( 40%) Size(mm): 0.15-0.3 Morphology: SUBHEDRAL AUGITE,H (AS SU%) Size(mm): BOPHITIC T Morphology: EXTURE; MAGNETITE ( 5%) Size(mm): <0.1 TI-MAGN; GLASS ( 5%) INTERSTITIAL GLASSY PATCHES REPLACED BY BROWN CLAY; APATITE ( TR%) Alteration - CLAY MINERALS ( 10%) Replacing: GLASS,CPX BROWN CLAY REPLACING GLASS + CPX ETC* Leg : 61 Top/Bottom Interval(mm): 230/ 250 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 901.00 Rock Type: IGNEOUS Core: 68 Sample Midpoint(m) : 908.74 Sect/Pc #: 6/PCE 2 ROCK = PLAG-CPX SPARSELY MICROPHYRIC BASALT ALTERED; Texture: SPARSELY MICROPHYRIC,HYALOPILITIC; Where sampled: SILL INTERIOR FINE GRAINED PORTION* Phenocrysts- PLAGIOCLASE ( 1%) Size(mm): 0.2-0.3 Morphology: EUHEDRAL-SUBHEDRAL MICROPHENOS,REPLACED,APPROX COMP AN68; CLINOPYROXENE ( 1%) Size(mm): 0.1-0.3 Morphology: EUHEDRAL-SUBHEDRAL MICROPHENOS,AUGITE* Groundmass - MAGNETITE ( 5%) Size(mm): <0.004 Morphology: DUST-LIKE TI-MAGN; GLASS ( 93%) GLASSY GROUNDMASS CONSISTS OF SPARSE PLAG MICROLITES + QUENCH CPX + GLASS--ALL ARE BEING REPLACED BY CLAY + CALCITE; PLAGIOCLASE SPARSE MICROLITES; CLINOPYROXENE QUENCH* Alteration - CALCITE Replacing: PLAG,GLASS PERCENTAGE VARIABLE; CLAY MINERALS Replacing: ALL.MINS,GLASS PERCENTAGE QUESTIONABLE,BROWN CLAY REPLACES EVERYTHING* Leg : 61 Top/Bottom Interval(mm): 280/ 300 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 910.00 Rock Type: IGNEOUS Core: 69 Sample Midpoint(m) : 911.79 Sect/Pc #: 2/PCE 2C ROCK = PLAG-CPX-OL MODERATELY MICROPHYRIC BASALT; Texture: MODERATELY MICROPHYRIC,GLASSY-VARIOLITIC; Where sampled: GLASSY FLOW MARGIN* Phenocrysts- OLIVINE ( 1%) Size(mm): 0.3-0.5 QUESTIONABLE PSEUDOMORPHS,MICROPHENOS; PLAGIOCLASE ( 2%) Size(mm): 0.2-0.4 Morphology: EUHEDRAL APPROX COMP AN70-72,MICROPHENOS; CLINOPYROXENE ( 2%) Size(mm): 0.1-0.2 Morphology: EUHEDRAL-SUBHEDRAL AUGITE,MICROPHENOS* Groundmass - PLAGIOCLASE VARIABLE PERCENTAGE,SMALL MICROLITES AND CRYSTALLITES; CLINOPYROXENE VARIABLE PERCENTAGE,QUENCH PHASE; MAGNETITE ( 5%) Size(mm): 0.008 Morphology: DUST-LIKE TI-MAGN; GLASS GROUNDMASS IS GLASSY TO VARIOLITIC AND HEAVILY REPLACED BY CLAY* Alteration - CLAY MINERALS Location: GROUNDMASS Replacing: GROUNDMASS,GLASS PERCENTAGE VARIABLE; ZEOLITE Location: VEINS PERCENTAGE VARIABLE* Leg : 61 Top/Bottom Interval(mm): 950/ 970 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 919.00 Rock Type: IGNEOUS Core: 70 Sample Midpoint(m) : 922.96 Sect/Pc #: 3/PCE 2 ROCK = CPX-PLAG ALTERED BASALT ALTERATION VEIN CONTACT WITH VARIOLITIC BASALT, ROCK IS CPX-PLAG ALTERED VARIOLITIC TEXTURED BASALT,VEIN IS DOMINANTLY (99.9%) A HIGH BIREFRINGENCE FIBROUS MINERAL WHICH LOOKS LIKE DISORDERED HYDRO-MICA BUT COULD BE A CLAY(?); Texture: VARIOLITIC; Where sampled: FLOW INTERIOR* Alteration - ZEOLITE PRESENT,FIBROUS AND LOW BIREFRINGENCE; CLAY MINERALS ( 0.1%) Location: PATCHES IN Location: VEIN GREEN CLAY PATCHES IN VEIN AND REPLACES THE ROCK; HYDROMICA ( 99.9%) Location: VEIN HIGH BIREFRINGENCE,FIBROUS,LOOKS LIKE DISCOLORED HYDROMICA BUT COULD BE A CLAY?* Leg : 61 Top/Bottom Interval(mm): 170/ 200 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 919.00 Rock Type: IGNEOUS Core: 70 Sample Midpoint(m) : 923.69 Sect/Pc #: 4/PCE 1 ROCK = CPX-PLAG MODERATELY MICROPHYRIC BASALT ALTERED; Texture: MODERATELY MICROPHYRIC,FINE GRAINED GRANULAR, COARSE GRAINED EQUIGRANULAR-SUBOPHITIC FINE GRAINED STUFF IS GRANULAR WITH AVERAGE GRAIN SIZE= 0.002 MM,COARSE GRAINED STUFF IS EQUIGRANULAR TO SUBOPHITIC WITH AVERAGE GRAIN SIZE = 0.06 MM; Where sampled: FLOW INTERIOR FINE GRAINED APOPHYSES IN MEDIUM GRAINED BASALT* Phenocrysts- PLAGIOCLASE ( 2%) Size(mm): 0.1-0.2 Morphology: EUHEDRAL-SUBHEDRAL MICROPHENOS,APPROX COMP AN65; CLINOPYROXENE ( 3%) Size(mm): 0.1-0.2 Morphology: EUHEDRAL-SUBHEDRAL MICROPHENOS,AUGITE* Groundmass - PLAGIOCLASE ( 42%) Size(mm): <0.08 APPROX COMP AN65; CLINOPYROXENE ( 43%) Size(mm): <0.04 AUGITE; MAGNETITE (10-15%) Size(mm): <0.04 15% IN FINE GRAINED REGIONS AND 10% IN COARSE GRAINED REGIONS,TI-MAGN* Alteration - CLAY MINERALS ( 10%) Replacing: ALL.MINS BROWN CLAY ALTERATION OF EVERYTHING* Leg : 61 Top/Bottom Interval(mm): 340/ 360 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 928.00 Rock Type: UNIDENTIFIED Core: 71 Sample Midpoint(m) : 928.35 Sect/Pc #: 1/PCE 5 ROCK = BASALTIC BRECCIA INTRUSIVE BRECCIA,CPX-PLAG PHYRIC VARIOLITIC- VITROPHYRIC BASALT,SWIRLY MIXTURE OF HYALOPILITIC AND VITROPHYRIC-SPHERULITIC BASALT INTRUDED AND BRECCIATED BY (NOW) COARSER GRAINED LIQUID. THE COARSE GRAINED BASALT IS SIMILAR IN TEXTURE TO OTHER BASALT APOPHYSES FOUND ELSEWHERE. ALTERATION VEINS TRANSECT PREVIOUSLY FORMED BRECCIA (I.E. BRECCIATION WAS PROBABLY CAUSED BY INTRUSION OF LATER LIQUID.); Texture: VARIOLITIC,HYALOPILITIC,VITROPHYRIC-SPHERULITIC; Where sampled: BRECCIATED ZONE OF PILLOW? MARGIN* Leg : 61 Top/Bottom Interval(mm): 440/ 470 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 928.00 Rock Type: IGNEOUS Core: 71 Sample Midpoint(m) : 928.46 Sect/Pc #: 1/PCE 6 ROCK = CPX-PLAG PHYRIC BASALT; Texture: VARIOLITIC-EQUIGRANULAR CONTINUOUS AND MONOTONIC VARIATION IN GRAIN SIZE FROM VARIOLITIC TO EQUIGRANULAR TEXTURE; Where sampled: PILLOW INTERIOR COARSE GRAINED PORTION* Leg : 61 Top/Bottom Interval(mm): 500/ 520 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 928.00 Rock Type: IGNEOUS Core: 71 Sample Midpoint(m) : 928.51 Sect/Pc #: 1/PCE 6 ROCK = CPX-PLAG PHYRIC BASALT CLAY FILLED ROUNDED VUGS ARE ABUNDANT; Texture: EQUIGRANULAR; Where sampled: COARSE GRAINED INTERIOR OF PILLOW* Alteration - CLAY MINERALS Location: VUGS ABUNDANT CLAY FILLED VUGS* Vesicles - Filling: CLAY.MIN Shape: ROUNDED ABUNDANT VUGS* Leg : 61 Top/Bottom Interval(mm): 530/ 550 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 931.00 Rock Type: IGNEOUS Core: 72 Sample Midpoint(m) : 933.04 Sect/Pc #: 2/PCE 4B ROCK = ALTERED DOLERITE; Texture: SUBOPHITIC; Where sampled: SILL INTERIOR* Groundmass - PLAGIOCLASE ( 40%) Size(mm): 0.2-0.6 Morphology: EUHEDRAL-SUBHEDRAL APPROX COMP AN60; CLINOPYROXENE ( 45%) Size(mm): 0.2-0.5 Morphology: EUHEDRAL-SUBHEDRAL AUGITE; MAGNETITE ( 5%) Size(mm): 0.2-0.3 Morphology: SKELETAL TI-MAGN* Alteration - CLAY MINERALS ( 10%) Replacing: ALL.MINS BROWN CLAY REPLACING EVERYTHING* Leg : 61 Top/Bottom Interval(mm): 1240/1260 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 937.00 Rock Type: IGNEOUS Core: 73 Sample Midpoint(m) : 939.75 Sect/Pc #: 2/PCE 8 ROCK = DOLERITE ALTERED; Texture: SUBOPHITIC; Where sampled: SILL INTERIOR* Groundmass - PLAGIOCLASE ( 40%) Size(mm): 0.3-0.6 Morphology: SUBHEDRAL APPROX COMP AN70-72; CLINOPYROXENE ( 40%) Size(mm): 0.3-0.6 Morphology: SUBHEDRAL AUGITE; MAGNETITE ( 10%) Size(mm): 0.2-0.5 Morphology: SKELETAL TI-MAGN; COMBINATION ( TR%) INCLUDES QUARTZ + ALK.SPAR GRANOPHYRIC INTERGROWTHS; APATITE ( TR%) Alteration - CLAY MINERALS ( 10%) Replacing: ALL.MINS BROWN CLAY REPLACING EVERYTHING* Leg : 61 Top/Bottom Interval(mm): 780/ 800 Describer: Seifert, K. Hole: 462A Top of Core Depth(m) : 953.00 Rock Type: IGNEOUS Core: 75 Sample Midpoint(m) : 958.29 Sect/Pc #: 4/PCE 5A ROCK = DOLERITE; Texture: SUBOPHITIC; Where sampled: SILL INTERIOR* Groundmass - OLIVINE ( 0%) PLAGIOCLASE ( 53.6%) Morphology: LATHS DIMENSIONS= 0.5X0.05 MM,APPROX COMP 36 DEGREES BY A-NORMAL,NEED BETTER CURVES TO GET COMPOSITION; CLINOPYROXENE ( 36.7%) Morphology: EQUIDIMENSIONAL DIMENSIONS= 0.2X0.2 MM; OPAQUE MINERALS ( 6.6%) INCLUDES MAGN + ILMENITE; GLASS ( 0%) ORTHOPYROXENE ( 0%) QUARTZ ( 0%) ALKALI FELDSPAR ( 0%) PERCENTAGES OBTAINED BY POINT COUNT (1000 POINTS)* Alteration - CLAY MINERALS ( 3.1%) Leg : 61 Top/Bottom Interval(mm): 310/ 320 Describer: Vallier, T. Hole: 462A Top of Core Depth(m) : 953.00 Rock Type: IGNEOUS Core: 75 Sample Midpoint(m) : 959.32 Sect/Pc #: 5/PCE 2 ROCK = DOLERITE; Texture: SUBOPHITIC; Where sampled: FLOW OR SILL INTERIOR* Groundmass - OLIVINE (<0.05%) REPLACED BY CLAY; PLAGIOCLASE ( 54%) CLINOPYROXENE ( 36%) 2V 45-55; OPAQUE MINERALS ( 5%) INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY POINT COUNT (700 POINTS)* Alteration - CLAY MINERALS ( 5%) Replacing: OL,GLASS REPLACING GLASS IS QUESTIONABLE* Leg : 61 Top/Bottom Interval(mm): 1220/1240 Describer: Vallier, T. Hole: 462A Top of Core Depth(m) : 953.00 Rock Type: IGNEOUS Core: 75 Sample Midpoint(m) : 960.23 Sect/Pc #: 5/PCE 7 ROCK = DOLERITE; Texture: SUBOPHITIC; Where sampled: FLOW OR SILL INTERIOR* Groundmass - PLAGIOCLASE ( 58%) CLINOPYROXENE ( 31%) OPAQUE MINERALS ( 6%) INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY POINT COUNT (1000 POINTS)* Alteration - CLAY MINERALS ( 5%) Replacing: GLASS REPLACING GLASS IS QUESTIONABLE* Leg : 61 Top/Bottom Interval(mm): 590/ 610 Describer: Windom, K. Hole: 462A Top of Core Depth(m) : 958.00 Rock Type: IGNEOUS Core: 76 Sample Midpoint(m) : 958.60 Sect/Pc #: 1/PCE 5 ROCK = DOLERITE; Texture: SUBOPHITIC; Where sampled: FLOW OR SILL INTERIOR* Phenocrysts- OLIVINE ( 0%) COMPLETELY ALTERED TO CLAY; PLAGIOCLASE ( 0%) CLINOPYROXENE ( 0%) SPINEL ( 0%) Groundmass - OLIVINE ( 0%) PLAGIOCLASE ( 37.7%) Size(mm): 0.1-6 Morphology: LATHS CLINOPYROXENE ( 39.1%) Size(mm): 0.05-0.3 Morphology: EQUIGRANULAR 2V 45-50,PARTIALLY ALTERED; OPAQUE MINERALS ( 6.7%) INCLUDES MAGN + ILMENITE; GLASS ( 0%) ALL ALTERED TO CLAY; ORTHOPYROXENE ( 0%) QUARTZ ( 0%) ALKALI FELDSPAR ( 0%) PERCENTAGES OBTAINED BY POINT COUNT (1000 POINTS)* Alteration - CARBONATE ( TR%) Location: VEIN CLAY MINERALS ( 16.5%) Location: INTERSTITIAL, Replacing: GLASS,OL Location: VEINS PYRITE Location: VEINS SOME PYRITE OCCURRING IN VEINS* Leg : 61 Top/Bottom Interval(mm): 210/ 230 Describer: Seifert, K. Hole: 462A Top of Core Depth(m) : 967.00 Rock Type: IGNEOUS Core: 77 Sample Midpoint(m) : 967.22 Sect/Pc #: 1/PCE 2 ROCK = DOLERITE; Texture: SUBOPHITIC; Where sampled: FLOW OR SILL INTERIOR* Groundmass - PLAGIOCLASE ( 40.0%) Morphology: LATHS DIMENSIONS= 0.2X0.02 MM; CLINOPYROXENE ( 47.1%) Size(mm): 0.02-0.08 Morphology: EQUIDIMENSIONAL OPAQUE MINERALS ( 5.3%) INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY POINT COUNT (1000 POINTS)* Alteration - CLAY MINERALS ( 7.5%) Location: SCATTERED Replacing: CPX MOSTLY REPLACING CPX* Leg : 61 Top/Bottom Interval(mm): 750/ 770 Describer: Vallier, T. Hole: 462A Top of Core Depth(m) : 967.00 Rock Type: IGNEOUS Core: 77 Sample Midpoint(m) : 967.76 Sect/Pc #: 1/PCE 3E ROCK = OL-PLAG-CPX MODERATELY MICROPHYRIC BASALT; Texture: MODERATELY MICROPHYRIC,INTERGRANULAR-WEAKLY VARIOLITIC (AUGITE + PLAG); Where sampled: SILL INTERIOR QUESTIONABLE* Phenocrysts- OLIVINE ( 1-2%) Size(mm): 0.1-0.2 PLAGIOCLASE ( <1%) Size(mm): 0.05-0.1 CLINOPYROXENE ( <1%) Size(mm): 0.05-0.1 Groundmass - OLIVINE ( 1.8%) PLAGIOCLASE ( 41.7%) CLINOPYROXENE ( 41.3%) OPAQUE MINERALS ( 14.1%) INCLUDES MAGN + ILMENITE; GLASS ALTERED TO CLAY,PERCENTAGES OBTAINED BY POINT COUNT (1000 POINTS)* Alteration - CLAY MINERALS ( 1.0%) Replacing: OL HIGH BIREFRINGENCE* Leg : 61 Top/Bottom Interval(mm): 700/ 730 Describer: Windom, K. Hole: 462A Top of Core Depth(m) : 967.00 Rock Type: IGNEOUS Core: 77 Sample Midpoint(m) : 969.22 Sect/Pc #: 2/PCE 2F ROCK = DOLERITE; Texture: SUBOPHITIC-VARIOLITIC; Where sampled: FLOW OR SILL INTERIOR* Phenocrysts- OLIVINE COMPLETELY ALTERED TO BROWN CLAY* Groundmass - OLIVINE ( 0%) PLAGIOCLASE ( 40.3%) Size(mm): 0.05-0.3 Morphology: LATHS SLIGHTLY ALTERED,ZONED; CLINOPYROXENE ( 39.5%) Size(mm): 0.04-0.15 Morphology: SUBHEDRAL GRAINS MODERATELY ALTERED; OPAQUE MINERALS ( 7.7%) INCLUDES MAGN + ILMENITE; GLASS ( 0%) COMPLETELY ALTERED; ORTHOPYROXENE ( 0%) QUARTZ ( 0%) ALKALI FELDSPAR ( 0%) PERCENTAGES OBTAINED BY POINT COUNT* Alteration - CLAY MINERALS ( 12.5%) Location: INTERSTITIAL Replacing: GLASS,OL PSEUDOMORPHS AFTER OL* Leg : 61 Top/Bottom Interval(mm): 50/ 90 Describer: Windom, K. Hole: 462A Top of Core Depth(m) : 976.00 Rock Type: IGNEOUS Core: 78 Sample Midpoint(m) : 976.07 Sect/Pc #: 1/PCE 2A ROCK = DOLERITE; Texture: SUBOPHITIC-INTERSERTAL; Where sampled: FLOW OR SILL INTERIOR* Phenocrysts- OLIVINE ( 0%) COMPLETELY ALTERED* Groundmass - OLIVINE ( 0%) PLAGIOCLASE ( 34.5%) Size(mm): 0.1-0.6 Morphology: LATHS GENERALLY FRESH,SLIGHTLY ZONED; CLINOPYROXENE ( 43.4%) Size(mm): 0.05-0.4 Morphology: SUBHEDRAL GRAINS GENERALLY FRESH; OPAQUE MINERALS ( 5.5%) INCLUDES MAGN + ILMENITE; GLASS ( 0%) COMPLETELY ALTERED; ORTHOPYROXENE ( 0%) QUARTZ ( 0%) ALKALI FELDSPAR ( 0%) PERCENTAGES OBTAINED BY POINT COUNT* Alteration - CARBONATE ( 0%) CLAY MINERALS ( 16.6%) Replacing: GLASS,OL ZEOLITE ( 0%) Leg : 61 Top/Bottom Interval(mm): 960/ 980 Describer: Windom, K. Hole: 462A Top of Core Depth(m) : 976.00 Rock Type: IGNEOUS Core: 78 Sample Midpoint(m) : 976.97 Sect/Pc #: 1/PCE 4 ROCK = DOLERITE; Texture: VARIOLITIC-SUBOPHITIC; Where sampled: FLOW OR SILL INTERIOR* Phenocrysts- OLIVINE ( 0%) ALTERED TO BROWN CLAY; PLAGIOCLASE ( 0%) CLINOPYROXENE ( 0%) SPINEL ( 0%) Groundmass - OLIVINE ( 0%) PLAGIOCLASE ( 37.5%) Size(mm): <0.01-0.4 Morphology: LATHS ALSO FINE INTERGROWTHS (RADIATING SHEAVES) WITH CPX; CLINOPYROXENE ( 43.8%) Size(mm): 0.01-0.3 Morphology: EQUIGRANULAR ALSO FINE INTERGROWTHS (RADIATING SHEAVES) WITH PLAG; OPAQUE MINERALS ( 8.2%) INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY POINT COUNT* Alteration - CLAY MINERALS ( 10.4%) Location: INTERSTITIAL Replacing: GLASS,OL PSEUDOMORPHS AFTER OL* Leg : 61 Top/Bottom Interval(mm): 870/ 890 Describer: Seifert, K. Hole: 462A Top of Core Depth(m) : 976.00 Rock Type: IGNEOUS Core: 78 Sample Midpoint(m) : 978.38 Sect/Pc #: 2/PCE 6 ROCK = DOLERITE; Texture: INTERSERTAL; Where sampled: FLOW OR SILL INTERIOR* Groundmass - PLAGIOCLASE ( 41.4%) Size(mm): 0.35X0.05 Morphology: LATHS DIMENSIONS= 0.35X0.05 MM; CLINOPYROXENE ( 38.2%) Size(mm): 0.04-0.10 Morphology: EQUIDIMENSIONAL OPAQUE MINERALS ( 8.5%) INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY Alteration - CLAY MINERALS ( 11.9%) Replacing: GLASS,OL,CPX GOOD PSEUDOMORPHS AFTER OL* POINT COUNT (1000 POINTS)* Leg : 61 Top/Bottom Interval(mm): 1380/1400 Describer: Vallier, T. Hole: 462A Top of Core Depth(m) : 985.00 Rock Type: IGNEOUS Core: 79 Sample Midpoint(m) : 986.39 Sect/Pc #: 1/PCE 1N ROCK = BASALT; Texture: INTERSERTAL* Phenocrysts- OLIVINE Size(mm): 0.15-0.2 MICROPHENOS; CLINOPYROXENE Size(mm): 0.1-0.15 MICROPHENOS* Groundmass - OLIVINE ( 1.5%) PSEUDOMORPHED BY CLAY; PLAGIOCLASE ( 43.1%) CLINOPYROXENE ( 38.8%) OPAQUE MINERALS ( 4.6%) INCLUDES MAGN + ILMENITE; GLASS ALTERED TO AND COUNTED AS CLAY,PERCENTAGES OBTAINED BY POINT COUNT (1000 POINTS)* Alteration - CLAY MINERALS ( 12.0%) Replacing: TACHYLITE,GLASS,OL ALTERED TACHYLITE + GLASS + OL PROBABLY EQUALS ORIGINAL GLASS,PSEUDOMORPHS AFTER OL COUNTED AS OL* Leg : 61 Top/Bottom Interval(mm): 1350/1370 Describer: Vallier, T. Hole: 462A Top of Core Depth(m) : 985.00 Rock Type: IGNEOUS Core: 79 Sample Midpoint(m) : 987.86 Sect/Pc #: 2/PCE 4B ROCK = OL-PLAG SPARSELY MICROPHYRIC BASALT; Texture: SPARSELY MICROPHYRIC,INTERSERTAL,INTERGRANULAR* Phenocrysts- OLIVINE ( >1%) Size(mm): 0.2-0.5 REPLACED BY CLAY,MICROPHENOS; PLAGIOCLASE ( <1%) Size(mm): 0.1-0.3 Morphology: EUHEDRAL ZONED,MICROPHENOS; CLINOPYROXENE Size(mm): 0.1-0.2 MICROPHENOS* Groundmass - OLIVINE ( 1.7%) REPLACED BY CLAY; PLAGIOCLASE ( 41.8%) CLINOPYROXENE ( 38.8%) OPAQUE MINERALS ( 7.4%) INCLUDES MAGN + ILMENITE; GLASS ALTERED TO AND COUNTED AS CLAY (ORIGINALLY TACHYLITE),PERCENTAGES OBTAINED BY POINT COUNT (1000 POINTS)* Alteration - CARBONATE ( 0.3%) Replacing: FEL,GLASS CLAY MINERALS ( 10.0%) Replacing: GLASS,OL CLAY PSEUDOMORPHS AFTER OL COUNTED AS OL; ZEOLITE ( 0%) Leg : 61 Top/Bottom Interval(mm): 420/ 440 Describer: Vallier, T. Hole: 462A Top of Core Depth(m) : 985.00 Rock Type: IGNEOUS Core: 79 Sample Midpoint(m) : 991.43 Sect/Pc #: 5/PCE 1C ROCK = OL SPARSELY MICROPHYRIC BASALT; Texture: SPARSELY MICROPHYRIC,INTERGRANULAR; Where sampled: SILL INTERIOR* Phenocrysts- OLIVINE ( >1%) Size(mm): 0.1-0.2 MICROPHENOS* Groundmass - OLIVINE ( 1.4%) REPLACED BY CLAY; PLAGIOCLASE ( 46.4%) CLINOPYROXENE ( 38.3%) OPAQUE MINERALS ( 6.1%) INCLUDES MAGN + ILMENITE; GLASS REPLACED BY AND COUNTED UNDER CLAY,PERCENTAGES OBTAINED BY POINT COUNT (1000 POINTS)* Alteration - CLAY MINERALS ( 7.8%) Location: INTERSTITIAL Replacing: GLASS,OL Leg : 61 Top/Bottom Interval(mm): 1350/1370 Describer: Vallier, T. Hole: 462A Top of Core Depth(m) : 985.00 Rock Type: IGNEOUS Core: 79 Sample Midpoint(m) : 992.36 Sect/Pc #: 5/PCE 1J ROCK = OL-PLAG-CPX MODERATELY MICROPHYRIC BASALT; Texture: MODERATELY MICROPHYRIC,INTERGRANULAR WITH VARIOLITIC CLOTS; Where sampled: NEAR BASE OF UNIT--FINER GRAINED MARGIN* Phenocrysts- OLIVINE ( 1-2%) Size(mm): 0.1-0.4 ALTERED TO CLAY,MICROPHENOS; PLAGIOCLASE ( <1%) Size(mm): 0.1-0.3 MICROPHENOS; CLINOPYROXENE ( <1%) Size(mm): 0.05-0.15 MICROPHENOS* Groundmass - OLIVINE ( 2.2%) ALTERED TO CLAY; PLAGIOCLASE ( 40.8%) CLINOPYROXENE ( 43.5%) OPAQUE MINERALS ( 8.9%) INCLUDES MAGN + ILMENITE; GLASS ( 4.6%) ALTERED TO CLAY,PERCENTAGES OBTAINED BY POINT COUNT (1000 POINTS)* Alteration - CLAY MINERALS Location: INTERSTITIAL Replacing: GLASS,OL PSEUDOMORPHS* Leg : 61 Top/Bottom Interval(mm): 920/ 940 Describer: Seifert, K. Hole: 462A Top of Core Depth(m) : 998.00 Rock Type: IGNEOUS Core: 81 Sample Midpoint(m) : 998.93 Sect/Pc #: 1/PCE 5C ROCK = DOLERITE; Texture: INTERGRANULAR; Where sampled: FLOW OR SILL INTERIOR* Groundmass - OLIVINE ( 1.2%) Size(mm): 0.2-0.3 CLAY POCKETS WITH EUHEDRAL OUTLINES; PLAGIOCLASE ( 47.6%) Size(mm): 0.15X0.04 DIMENSIONS= 0.15X0.04 MM; CLINOPYROXENE ( 42.7%) Size(mm): 0.06 OPAQUE MINERALS ( 5.9%) INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY POINT COUNT* Alteration - CLAY MINERALS ( 2.6%) Replacing: OL CLAY POCKETS WITH EUHEDRAL OUTLINES* Leg : 61 Top/Bottom Interval(mm): 580/ 600 Describer: Vallier, T. Hole: 462A Top of Core Depth(m) : 998.00 Rock Type: IGNEOUS Core: 81 Sample Midpoint(m) : 1001.59 Sect/Pc #: 3/PCE 2A ROCK = BASALT; Texture: INTERGRANULAR* Phenocrysts- OLIVINE Size(mm): 0.2-0.45 MICROPHENOS,ALTERED TO CLAY; PLAGIOCLASE Size(mm): 0.2-0.7 PHENOS + MICROPHENOS; CLINOPYROXENE Size(mm): 0.1-0.3 MICROPHENOS* Groundmass - OLIVINE ( 1.3%) ALTERED TO CLAY; PLAGIOCLASE ( 43.2%) CLINOPYROXENE ( 35.6%) OPAQUE MINERALS ( 13.3%) INCLUDES MAGN + ILMENITE; GLASS ALTERED TO AND COUNTED AS CLAY,PERCENTAGES OBTAINED BY POINT COUNT (1000 POINTS)* Alteration - CLAY MINERALS ( 6.6%) Location: INTERSTITIAL Replacing: GLASS,OL Leg : 61 Top/Bottom Interval(mm): 1380/1400 Describer: Vallier, T. Hole: 462A Top of Core Depth(m) : 1005.50 Rock Type: IGNEOUS Core: 84 Sample Midpoint(m) : 1009.89 Sect/Pc #: 3/PCE 1F ROCK = BASALT; Texture: INTERGRANULAR* Phenocrysts- OLIVINE ( <1%) Size(mm): 0.1-0.2 ALTERED TO CLAY,MICROPHENOS; PLAGIOCLASE Size(mm): 0.3-0.4 MICROPHENOS; CLINOPYROXENE Size(mm): 0.3-0.4 MICROPHENOS* Groundmass - OLIVINE ( 1.5%) ALTERED TO CLAY; PLAGIOCLASE ( 50.7%) Size(mm): 0.05-0.1 CLINOPYROXENE ( 35.1%) Size(mm): 0.05-1.5 OPAQUE MINERALS ( 7.2%) Size(mm): 0.03-0.05 INCLUDES MAGN + ILMENITE; GLASS ( 0%) PERCENTAGES OBTAINED BY POINT COUNT (1000 POINTS)* Alteration - CLAY MINERALS ( 5.5%) Location: INTERSTITIAL Replacing: GLASS,OL MOSTLY REPLACING INTERSTITIAL GLASS* Leg : 61 Top/Bottom Interval(mm): 490/ 510 Describer: Seifert, K. Hole: 462A Top of Core Depth(m) : 1005.50 Rock Type: IGNEOUS Core: 84 Sample Midpoint(m) : 1010.50 Sect/Pc #: 4/PCE 1D ROCK = APHYRIC BASALT; Texture: APHYRIC,INTERSERTAL; Where sampled: FLOW INTERIOR* Groundmass - PLAGIOCLASE ( 38.5%) Size(mm): 0.15X0.04 Morphology: LATHS DIMENSIONS= 0.15X0.04 MM; CLINOPYROXENE ( 21.5%) Size(mm): 0.10 Morphology: EQUIDIMENSIONAL BADLY ALTERED; OPAQUE MINERALS ( 4.3%) INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY POINT COUNT (1000 POINTS)* Alteration - CLAY MINERALS ( 35.7%) Leg : 61 Top/Bottom Interval(mm): 750/ 770 Describer: Windom, K. Hole: 462A Top of Core Depth(m) : 1005.50 Rock Type: IGNEOUS Core: 84 Sample Midpoint(m) : 1012.26 Sect/Pc #: 5/PCE 2 ROCK = DOLERITE; Texture: SUBOPHITIC; Where sampled: FLOW OR SILL INTERIOR* Phenocrysts- OLIVINE PATCHES OF BROWN CLAY MAY BE PSEUDOMORPHS OF OL* Groundmass - OLIVINE ( 0%) PLAGIOCLASE ( 42.6%) Size(mm): 0.05-0.6 UNALTERED,ZONED; CLINOPYROXENE ( 43.1%) Size(mm): 0.05-0.4 GENERALLY FRESH; OPAQUE MINERALS ( 6.1%) Size(mm): 0.05-0.5 INCLUDES MAGN + ILMENITE; GLASS ALTERED TO BROWN CLAY; ORTHOPYROXENE ( 0%) QUARTZ ( 0%) ALKALI FELDSPAR ( 0%) PERCENTAGES OBTAINED BY POINT COUNT* Alteration - CARBONATE ( 0%) CLAY MINERALS ( 8.3%) Location: INTERSTITIAL, Replacing: GLASS,OL Location: PATCHES BROWN,MAY BE PSEUDOMORPHS AFTER OL?,CONTAINS NUMEROUS OPAQUES; ZEOLITE ( 0%) Leg : 61 Top/Bottom Interval(mm): 830/ 850 Describer: Vallier, T. Hole: 462A Top of Core Depth(m) : 1032.50 Rock Type: IGNEOUS Core: 88 Sample Midpoint(m) : 1034.84 Sect/Pc #: 2/PCE 1E ROCK = OL SPARSELY PHYRIC BASALT; Texture: SPARSELY PORPHYRITIC,INTERGRANULAR* Phenocrysts- OLIVINE ( 1.6%) ALTERED TO CLAY* Groundmass - PLAGIOCLASE ( 50.0%) Size(mm): 0.2-0.3 CLINOPYROXENE ( 36.8%) Size(mm): 0.1-0.3 OPAQUE MINERALS ( 4.2%) INCLUDES MAGN + ILMENITE; GLASS ALTERED TO AND COUNTED AS CLAY,ONE GLASSY ZONE ACROSS THIN SECTION,PERCENTAGES OBTAINED BY POINT COUNT (500 POINTS)* Alteration - CLAY MINERALS ( 7.4%) Replacing: OL,GLASS Leg : 61 Top/Bottom Interval(mm): 1190/1210 Describer: Windom, K. Hole: 462A Top of Core Depth(m) : 1032.50 Rock Type: IGNEOUS Core: 88 Sample Midpoint(m) : 1035.20 Sect/Pc #: 2/PCE 1F ROCK = DOLERITE; Texture: SUBOPHITIC; FLOW OR SILL INTERIOR* Phenocrysts- OLIVINE ( 0%) PLAGIOCLASE ( 0%) CLINOPYROXENE ( 0%) SPINEL ( 0%) Groundmass - PLAGIOCLASE ( 45.9%) Size(mm): 0.05-0.5 Morphology: LATHS ZONED; CLINOPYROXENE ( 36.0%) Size(mm): 0.03-0.3 Morphology: EQUIGRANULAR OPAQUE MINERALS ( 4.5%) INCLUDES MAGN + ILMENITE; GLASS ( 1.8%) RELATIVELY FRESH--ALTERED GLASS COUNTED AS CLAY; ORTHOPYROXENE ( 0%) QUARTZ ( 0%) ALKALI FELDSPAR ( TR%) PERCENTAGES OBTAINED BY POINT COUNT (1000 POINTS)* Alteration - CLAY MINERALS ( 11.7%) Location: INTERSTITIAL Replacing: GLASS Leg : 61 Top/Bottom Interval(mm): 1250/1270 Describer: Seifert, K. Hole: 462A Top of Core Depth(m) : 1032.50 Rock Type: IGNEOUS Core: 88 Sample Midpoint(m) : 1035.26 Sect/Pc #: 2/PCE 1F ROCK = APHYRIC BASALT; Texture: APHYRIC,INTERGRANULAR; Where sampled: FLOW OR SILL INTERIOR* Groundmass - PLAGIOCLASE ( 54.0%) Size(mm): 0.18X0.14 Morphology: LATHS DIMENSIONS= 0.18X0.14 MM; CLINOPYROXENE ( 32.6%) Size(mm): 0.08 Morphology: EQUIDIMENSIONAL OPAQUE MINERALS ( 2.6%) INCLUDES MAGN + ILMENITE; KFELDSPAR QUESTIONABLE,SOME INTERSTITIAL K-SPAR? INTERGROWTHS,PERCENTAGES OBTAINED BY POINT COUNT (500 POINTS)* Alteration - CLAY MINERALS ( 10.8%) Leg : 61 Top/Bottom Interval(mm): 380/ 400 Describer: Vallier, T. Hole: 462A Top of Core Depth(m) : 1036.50 Rock Type: IGNEOUS Core: 89 Sample Midpoint(m) : 1038.39 Sect/Pc #: 2/PCE 2B ROCK = APHYRIC BASALT VEINED; Texture: APHYRIC,INTERSERTAL SOME VARIOLITIC TEXTURE IN PLACES,VEINED; Where sampled: NEXT TO GLASSY MARGIN* Groundmass - OLIVINE ( 0.2%) RARE,ALTERED TO CLAY; PLAGIOCLASE ( 30.0%) Size(mm): 0.05-0.15 CLINOPYROXENE ( 31.2%) Size(mm): 0.05-0.10 OPAQUE MINERALS ( 2.4%) INCLUDES MAGN + ILMENITE; GLASS ( 0%) ALTERED TO AND COUNTED UNDER CLAY.MIN (ALTERED TO SMEC),PERCENTAGES OBTAINED BY POINT COUNT (500 POINTS)--COUNT IS POOR BECAUSE OF ALTERED VARIOLITES OF CPX + GLASS* Alteration - CARBONATE ( 1.6%) Location: VEIN REPLACING A VEIN MINERAL?; CLAY MINERALS ( 34.6%) Replacing: GLASS,OL PREDOMINANTLY REPLACING GLASS,GLASS IS NOW SMEC* Leg : 61 Top/Bottom Interval(mm): 720/ 740 Describer: Windom, K. Hole: 462A Top of Core Depth(m) : 1036.50 Rock Type: IGNEOUS Core: 89 Sample Midpoint(m) : 1038.73 Sect/Pc #: 2/PCE 5 ROCK = PLAG-CPX SPARSELY PHYRIC BASALT; Texture: SPARSELY PORPHYRITIC,VARIOLITIC A FEW PHENOS AND INTERGRANULAR AREAS; Where sampled: FLOW OR SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 1%) Size(mm): 0.4-0.6 CLINOPYROXENE ( 1%) Size(mm): 0.2-0.3 MICROPHENOS* Groundmass - PLAGIOCLASE ( 19.8%) Size(mm): 0.1-0.2 Morphology: LATHS CLINOPYROXENE ( 16.6%) Size(mm): 0.01-0.1 Morphology: EQUIGRANULAR PLAG + PYX OCCUR IN VERY FINE GRAINED VARIOLITIC PATCHES WHICH ARE HIGHLY ALTERED IN ADDITION TO THE ESSENTIALLY FRESH GRAINS REPRESENTED HERE; OPAQUE MINERALS ( 12.4%) INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY POINT COUNT (500 POINTS)* Alteration - CLAY MINERALS ( 49.2%) Location: VARIOLES, Replacing: GLASS,PYX,PLAG,OL Location: INTERSTITIAL VERY FINE GRAINED,MOSTLY REPLACING VARIOLES OF PYX + PLAG + GLASS* Leg : 61 Top/Bottom Interval(mm): 240/ 260 Describer: Seifert, K. Hole: 462A Top of Core Depth(m) : 1041.50 Rock Type: IGNEOUS Core: 90 Sample Midpoint(m) : 1041.75 Sect/Pc #: 1/PCE 2A ROCK = APHYRIC BASALT; Texture: APHYRIC,INTERSERTAL; Where sampled: FLOW OR SILL INTERIOR* Groundmass - PLAGIOCLASE ( 48.6%) Size(mm): 0.3X0.04 Morphology: LATHS DIMENSIONS= 0.3X0.04 MM; CLINOPYROXENE ( 33.8%) Size(mm): 0.18 Morphology: EQUIDIMENSIONAL OPAQUE MINERALS ( 6.0%) INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY POINT COUNT (500 POINTS)* Alteration - CLAY MINERALS ( 11.6%) Leg : 61 Top/Bottom Interval(mm): 600/ 630 Describer: Seifert, K. Hole: 462A Top of Core Depth(m) : 1041.50 Rock Type: IGNEOUS Core: 90 Sample Midpoint(m) : 1045.12 Sect/Pc #: 3/PCE 1F ROCK = APHYRIC BASALT; Texture: APHYRIC,INTERSERTAL; Where sampled: FLOW OR SILL INTERIOR* Phenocrysts- PLAGIOCLASE A FEW MICROPHENOS* Groundmass - PLAGIOCLASE ( 52.4%) Morphology: LATHS DIMENSIONS= 0.5X0.05 MM; CLINOPYROXENE ( 34.0%) Size(mm): 0.16 OPAQUE MINERALS ( 7.2%) INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY POINT COUNT (500 POINTS)* Alteration - CLAY MINERALS ( 6.4%) PERHAPS SOME PSEUDOMORPHS AFTER OL* Leg : 61 Top/Bottom Interval(mm): 400/ 420 Describer: Seifert, K. Hole: 462A Top of Core Depth(m) : 1041.50 Rock Type: IGNEOUS Core: 90 Sample Midpoint(m) : 1047.91 Sect/Pc #: 5/PCE 2 ROCK = APHYRIC BASALT; Texture: APHYRIC,INTERSERTAL; Where sampled: FLOW OR SILL INTERIOR* Groundmass - PLAGIOCLASE ( 52.8%) Morphology: LATHS DIMENSIONS= 0.18X0.02; CLINOPYROXENE ( 34.6%) Size(mm): 0.08 Morphology: EQUIDIMENSIONAL OPAQUE MINERALS ( 4.8%) INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY POINT COUNT (500 POINTS)* Alteration - CLAY MINERALS ( 7.8%) Leg : 61 Top/Bottom Interval(mm): 230/ 260 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 624.00 Rock Type: IGNEOUS Core: B 1 Sample Midpoint(m) : 624.24 Sect/Pc #: 1/PCE 2 ROCK = DOLERITE ALTERED,(BIT CORE); Texture: MICRODOLERITIC; Where sampled: SILL INTERIOR BUT OUT OF ORDER* Phenocrysts- PLAGIOCLASE ( TR%) CLINOPYROXENE ( TR%) Size(mm): <0.5 AUGITE* Groundmass - PLAGIOCLASE ( 30%) Size(mm): 0.1-0.3 APPROX COMP AN55 ZONED TO AN25; CLINOPYROXENE ( 38%) Size(mm): <0.25 AUGITE; MAGNETITE ( 5%) Size(mm): 0.1-0.3 Morphology: SUBHEDRAL TI-MAGN; GLASS ( 7%) TOTALLY REPLACED INTERSTITIAL PATCHES; AMPHIBOLE ( 5%) MINUTE NEEDLES REPLACING CPX* Alteration - CLAY MINERALS ( 15%) Replacing: CPX,PLAG AMPHIBOLE ( 5%) Replacing: CPX MINUTE NEEDLES REPLACING CPX* Leg : 61 Top/Bottom Interval(mm): 400/ 430 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 624.00 Rock Type: IGNEOUS Core: B 1 Sample Midpoint(m) : 624.42 Sect/Pc #: 1/PCE 3 ROCK = DOLERITE ALTERED; Texture: MICRODOLERITIC; Where sampled: SILL INTERIOR BUT OUT OF POSITION* Phenocrysts- CLINOPYROXENE ( TR%) Size(mm): TO 0.5 AUGITE* Groundmass - PLAGIOCLASE ( 20%) Size(mm): 0.1-0.3 APPROX COMP AN60 ZONED TO AN30 (AN70 IS RARE); CLINOPYROXENE ( 35%) Size(mm): <0.2 AUGITE; MAGNETITE ( 10%) Size(mm): <0.20 TI-MAGN; GLASS ( 10%) TOTALLY REPLACED GLASS PATCHES; QUARTZ ( TR%) ALKALI FELDSPAR ( TR%) AMPHIBOLE PERCENTAGE UNCERTAIN; APATITE ( TR%) Alteration - COMBINATION ( 25%) BROWN CLAY + AMPH (TOTAL ALTERATION PRODUCTS); CLAY MINERALS AMPHIBOLE Leg : 61 Top/Bottom Interval(mm): 100/ 120 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 690.00 Rock Type: IGNEOUS Core: B 2 Sample Midpoint(m) : 690.11 Sect/Pc #: 1/PCE 2 ROCK = CPX-PLAG MODERATELY MICROPHYRIC BASALT FRESH; Texture: MODERATELY MICROPHYRIC,INTERSERTAL-SPHERULITIC; Where sampled: MARGINAL ZONE OF SILL* Phenocrysts- PLAGIOCLASE ( 1%) Size(mm): 0.1-0.3 Morphology: SUBHEDRAL APPROX COMP AN58,MICROPHENOS; CLINOPYROXENE ( 4%) Size(mm): 0.1-0.4 Morphology: SUBHEDRAL AUGITE* Groundmass - PLAGIOCLASE ( 35%) Size(mm): <0.4 Morphology: SUBHEDRAL-SKELETAL APPROX COMP AN60; CLINOPYROXENE ( 40%) Size(mm): <0.2 MUCH OF IT QUENCH TEXTURED; MAGNETITE ( 10%) Size(mm): <0.02 GLASS ( 3-4%) ONLY A FEW INTERSERTAL PATCHES* Alteration - CLAY MINERALS ( 10%) Replacing: CPX,GLASS GREENISH BROWN* Leg : 61 Top/Bottom Interval(mm): 900/ 920 Describer: Batiza, R. Hole: 462A Top of Core Depth(m) : 690.00 Rock Type: IGNEOUS Core: B 2 Sample Midpoint(m) : 690.91 Sect/Pc #: 1/PCE 9 ROCK = DOLERITE RELATIVELY FRESH; Texture: SUBOPHITIC; Where sampled: INTERIOR OF SILL* Groundmass - PLAGIOCLASE ( 37%) Size(mm): 0.3-0.7 APPROX COMP AN58-60; CLINOPYROXENE ( 46%) Size(mm): 0.2-0.8 Morphology: SUBHEDRAL AUGITE; MAGNETITE ( 5%) Size(mm): <0.2 TI-MAGN; GLASS ( 1-2%) REPLACED BY CLAY + CHLORITE + AMPH,ALSO VARIOLITIC PATCHES; COMBINATION ( TR%) INCLUDES GRANOPHYRIC PATCHES OF QUARTZ + ALK.SPAR; AMPHIBOLE ( TR-1%) Alteration - COMBINATION ( 10%) Replacing: CPX INCLUDES CLAY+AMPH+CHLORITE,CLAY IS BROWNISH-GREEN; CHLORITE ( TR%) |
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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