Leg : 59 Top/Bottom Interval(mm): 530/ 560 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 214.00 Rock Type: TUFF Core: 24 Sample Midpoint(m) : 216.05 Sect/Pc #: 2/ ROCK = PEBBLY TUFF THIN SECTION IS OF GRAINS IN SEDIMENT* Groundmass - PLAGIOCLASE ZONED,BASALTIC DEBRIS; CLINOPYROXENE BASALTIC DEBRIS; GLASS PUMICE FRAGMENTS OTHER ALTERED VOLCANIC FRAGMENTS* Leg : 59 Top/Bottom Interval(mm): 880/1020 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 214.00 Rock Type: TUFF Core: 24 Sample Midpoint(m) : 216.45 Sect/Pc #: 2/ ROCK = VITRIC TUFF THIN SECTION IS OF GRAINS IN SEDIMENT* Groundmass - OLIVINE BASALTIC DEBRIS; PLAGIOCLASE APPROX COMP AN64,BASALTIC DEBRIS; CLINOPYROXENE BASALTIC DEBRIS; GLASS PUMICE FRAGMENTS* Leg : 59 Top/Bottom Interval(mm): 1010/1040 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 214.00 Rock Type: TUFF Core: 24 Sample Midpoint(m) : 216.53 Sect/Pc #: 2/ ROCK = VITRIC TUFF THIN SECTION IS OF GRAINS IN SEDIMENT* Groundmass - OLIVINE PLAGIOCLASE ZONED; CLINOPYROXENE GLASS PUMICE FRAGMENTS; OTHER BASALT FRAGMENTS* Leg : 59 Top/Bottom Interval(mm): 360/ 400 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 233.00 Rock Type: TUFF Core: 26 Sample Midpoint(m) : 233.38 Sect/Pc #: 1/ ROCK = TUFFACEOUS VOLCANICLASTIC BRECCIA THIN SECTION IS OF GRAINS IN SEDIMENT* Groundmass - OLIVINE BASALTIC; PLAGIOCLASE ZONED,APPROX COMP AN74,BASALTIC; CLINOPYROXENE BASALTIC; OPAQUE MINERALS INCLUDES MAGN + ILMENITE,BASALTIC; GLASS PUMICE FRAGMENTS,DEFINITELY NOT IGNIMBRITE-- CONTINUOUS GLASS FIBERS AND XTLS--NOT PARALLEL ELONGATION; OTHER BASALT FRAGMENTS* Leg : 59 Top/Bottom Interval(mm): 1400/1420 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 233.00 Rock Type: TUFF Core: 26 Sample Midpoint(m) : 234.41 Sect/Pc #: 1/ ROCK = TUFFACEOUS VOLCANICLASTIC BRECCIA THIN SECTION IS OF CLASTS IN SEDIMENTARY ROCKS* Groundmass - PLAGIOCLASE APPROX COMP AN64,BASALTIC?; GLASS PUMICE FRAGMENTS; QUARTZ ONE GRAIN (>1 MM IN DIAMETER); OTHER TUFF--CONSOLIDATED NOT WELDED--ALTERED TO ZEOLITES; OTHER BASALT FRAGMENTS* Alteration - ZEOLITE Location: TUFF Leg : 59 Top/Bottom Interval(mm): 1300/1330 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 309.00 Rock Type: TUFF Core: 34 Sample Midpoint(m) : 310.32 Sect/Pc #: 1/ ROCK = TUFFACEOUS VOLCANICLASTIC BRECCIA THIN SECTION IS OF GRAINS IN SEDIMENT* Groundmass - GLASS BASALTIC VESICULAR GLASS WITH PHENOCRYSTS OF OL + PLAG + CPX + MAGNETITE* OLIVINE PLAGIOCLASE APPROX COMP AN76; CLINOPYROXENE MAGNETITE Leg : 59 Top/Bottom Interval(mm): 180/ 210 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 318.50 Rock Type: TUFF Core: 35 Sample Midpoint(m) : 319.66 Sect/Pc #: CC/ ROCK = LITHIC TUFF THIN SECTION IS THROUGH SEDIMENT SECTION OF CORE, ROCK TYPES OF CLASTS: 1)HYALOPILITIC BASALT 2)BASALTIC? PUMICE 3)ALTERED TRACHYTIC ANDESITE? 4)ALTERED OXIDIZED BASALTIC VARIOLITIC GLASS? 5)ONE QUARTZ GRAIN, CLASTS CEMENTED WITH ZEOLITES* Alteration - ZEOLITE CEMENTS THE ROCK CLASTS INTO A LITHIC TUFF* Leg : 59 Top/Bottom Interval(mm): 50/ 70 Describer: Zakariakze, G. Hole: 448 Top of Core Depth(m) : 337.50 Rock Type: IGNEOUS Core: 37 Sample Midpoint(m) : 337.56 Sect/Pc #: 1/PCE 2 ROCK = PLAG-OL MODERATELY PHYRIC THOLEIITE; Texture: MODERATELY PORPHYRITIC,INTERSERTAL-HYALOPILITIC; Where sampled: PILLOW INTERIOR* Phenocrysts- OLIVINE ( 1%) Size(mm): 0.5 Morphology: EUHEDRAL PSEUDOMORPHS; PLAGIOCLASE ( 1%) Size(mm): 2 Morphology: EUHEDRAL Groundmass - OLIVINE ( 1%) Size(mm): 0.02 Morphology: IRREGULAR GRAINS PLAGIOCLASE ( 40%) Size(mm): 0.01 Morphology: ELONGATE LATHS CLINOPYROXENE ( 20%) Size(mm): <0.005 Morphology: IRREGULAR OPAQUE MINERALS ( 2-3%) Size(mm): <0.005 Morphology: IRREGULAR INCLUDES MAGN + ILMENITE GLASS (15-20%) COMPLETELY ALTERED* Alteration - CLAY MINERALS Replacing: GLASS,PLAG,OL Vesicles - Size(mm): 0.2 Percent: 10 Filling: CARB Shape: SPERICAL, Shape: IRREGULAR MOST OF THEM ARE EMPTY* Leg : 59 Top/Bottom Interval(mm): 1370/1390 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 352.00 Rock Type: IGNEOUS Core: 39 Sample Midpoint(m) : 353.38 Sect/Pc #: 1/PCE 12A ROCK = PLAG-OL MODERATELY PHYRIC BASALT; Texture: MODERATELY PORPHYRITIC,SUBOPHITIC; Where sampled: FLOW INTERIOR* Phenocrysts- OLIVINE ( TR%) Size(mm): 1 PLAGIOCLASE ( 2%) Size(mm): 3 APPROX COMP AN64* Groundmass - OLIVINE ( 0%) PLAGIOCLASE ( 35%) Size(mm): 0.5 CLINOPYROXENE ( 26%) OPAQUE MINERALS ( 7%) INCLUDES MAGN + ILMENITE* Alteration - CLAY MINERALS ( 2%) Location: VESICLES Replacing: PLAG,CPX PERCENTAGE IS UNCERTAIN BUT SLIGHT; CALCITE Location: VESICLES Vesicles - Size(mm): 0.4-1.6 Percent: 30 Filling: CALCITE, Shape: IRREGULAR Filling: CLAY.MIN MOSTLY FILLED WITH CALCITE,CLAY IS GREEN* Leg : 59 Top/Bottom Interval(mm): 360/ 380 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 352.00 Rock Type: IGNEOUS Core: 39 Sample Midpoint(m) : 353.87 Sect/Pc #: 2/PCE 2D ROCK = PLAG SPARSELY PHYRIC BASALT; Texture: SPARSELY PORPHYRITIC,HYALOPILITIC-SUBOPHITIC* Phenocrysts- OLIVINE ( 0%) PLAGIOCLASE ( 1%) Size(mm): 1.2 Morphology: BLOCKY APPROX COMP AN64?,GLOMEROCRYSTS; CLINOPYROXENE ( 0%) SPINEL ( 0%) Groundmass - OLIVINE ( 5%) Size(mm): 0.2 PLAGIOCLASE ( 35%) Size(mm): 0.8 Morphology: ACICULAR APPROX COMP AN67,ZONED; CLINOPYROXENE ( 10%) Size(mm): 0.5 OPAQUE MINERALS ( 5%) Size(mm): 0.02 INCLUDES MAGN + ILMENITE; GLASS ( 24%) FINELY CRYSTALLINE PYX + PLAG?* Alteration - CALCITE ( 1%) Location: VESICLES OTHER GROUNDMASS OXIDIZED SLIGHTLY* Vesicles - Size(mm): 0.4-0.8 Percent: 20 Filling: EMPTY,CALCITE Shape: IRREGULAR ONLY RARE CALCITE* Leg : 59 Top/Bottom Interval(mm): 1230/1250 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 375.50 Rock Type: IGNEOUS Core: 43 Sample Midpoint(m) : 376.74 Sect/Pc #: 1/PCE 8D ROCK = APHYRIC BASALT; Texture: APHYRIC,HYALOPILITIC GLASS MATRIX; Where sampled: FLOW INTERIOR FLOW BANDING IS SHOWN BY ALIGNED VESICLES WITH GLASS RIMS AND SOME ZEOLITE FILLING* Groundmass - OLIVINE ( 0%) PLAGIOCLASE ( 50%) Size(mm): 0.3 CLINOPYROXENE ( 10%) Size(mm): 0.1 OPAQUE MINERALS ( 5%) INCLUDES MAGN + ILMENITE; GLASS ( 25%) OXIDIZED TO OPAQUE BROWN* Alteration - ZEOLITE Location: VESICLES, Location: VEINS OTHER EXTENSIVE OXIDATION,GLASS OXIDIZED OPAQUE BROWN* Vesicles - Size(mm): 0.2-0.6 Percent: 5 Filling: EMPTY Size(mm): 1-8 Percent: K Filling: GLASS,ZEOLITES Shape: IRREGULAR RIMMED WITH GLASS + ZEOLITES* Leg : 59 Top/Bottom Interval(mm): 1000/1030 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 385.00 Rock Type: IGNEOUS Core: 44 Sample Midpoint(m) : 386.02 Sect/Pc #: 1/PCE 8G ROCK = PLAG-OL-CPX MODERATELY PHYRIC BASALT; Texture: MODERATELY PORPHYRITIC,SUBOPHITIC; Where sampled: FLOW INTERIOR* Phenocrysts- OLIVINE ( 2%) Size(mm): 0.4 PLAGIOCLASE ( 2%) Size(mm): 1.5 Morphology: BLOCKY CLINOPYROXENE ( 1%) Size(mm): 0.4 Groundmass - OLIVINE ( 5%) Size(mm): 0.2 Morphology: EQUANT PLAGIOCLASE ( 40%) Size(mm): 0.04-0.2 Morphology: THIN BLADES OPAQUE MINERALS ( 12%) INCLUDES MAGN + ILMENITE; GLASS ( 20%) FINELY CRYSTALLINE CPX + PLAG + GLASS?* Alteration - ZEOLITE Location: VEINS, Location: VESICLES CENTER OF VEINS IS CARBONATE--VEINS LINED WITH ZEOLITES; CARBONATE Location: VEINS CENTER OF VEINS IS CARBONATE--VEINS LINED WITH ZEOLITES; OTHER OXIDE DISCOLORATION* Vesicles - Size(mm): 0.5-3.5 Percent: 2 Filling: ZEOLITES OR Shape: SPHERICAL Filling: EMPTY Size(mm): 0.2-0.6 Percent: 15 Filling: EMPTY Shape: IRREGULAR Leg : 59 Top/Bottom Interval(mm): 940/ 970 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 404.00 Rock Type: IGNEOUS Core: 46 Sample Midpoint(m) : 404.96 Sect/Pc #: 1/PCE 5C ROCK = PLAG SPARSELY PHYRIC BASALT; Texture: SPARSELY PORPHYRITIC,HYALOPILITIC; Where sampled: PILLOW INTERIOR 5 CM FROM PILLOW MARGIN* Phenocrysts- OLIVINE ( 0%) PLAGIOCLASE ( 1%) Size(mm): 0.5 NO CORRECT ALIGNMENT FOR AN; CLINOPYROXENE ( 0%) Groundmass - OLIVINE ( 0%) PLAGIOCLASE ( 50%) Size(mm): 0.2 CLINOPYROXENE ( 5%) OPAQUE MINERALS ( 3%) INCLUDES MAGN + ILMENITE; GLASS ( 26%) Alteration - ZEOLITE Location: VESICLES OTHER SLIGHT OXIDATION* Vesicles - Size(mm): 0.5-2 Percent: 10 Filling: ZEOLITES Shape: SPHERICAL SOME ANALCITE; Size(mm): 0.05-0.1 Percent: 5 Filling: ZEOLITES Shape: IRREGULAR Leg : 59 Top/Bottom Interval(mm): 370/ 400 Describer: Ishi, T. Hole: 448 Top of Core Depth(m) : 413.50 Rock Type: IGNEOUS Core: 47 Sample Midpoint(m) : 415.39 Sect/Pc #: 2/PCE 5 ROCK = APHYRIC BASALT; Texture: APHYRIC,INTERSERTAL,FINE GRAINED GROUNDMASS; Where sampled: FLOW INTERIOR* Groundmass - PLAGIOCLASE ( 30%) Morphology: LATHS,EUHEDRAL-SUBHEDRAL APPROX COMP AN52; CLINOPYROXENE ( 20%) Morphology: SUBHEDRAL OPAQUE MINERALS ( 4%) INCLUDES MAGN + ILMENITE; GLASS ( 16%) Alteration - CLAY MINERALS ( RARE%) Replacing: GLASS Vesicles - Size(mm): 0.2-2 Percent: 30 Shape: IRREGULAR Leg : 59 Top/Bottom Interval(mm): 970/ 990 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 423.00 Rock Type: IGNEOUS Core: 48 Sample Midpoint(m) : 425.48 Sect/Pc #: 2/PCE 7 ROCK = APHYRIC BASALT; Texture: APHYRIC,PILOTAXITIC-OPHITIC* Groundmass - OLIVINE ( 0%) PLAGIOCLASE ( 40%) Size(mm): 0.2 CLINOPYROXENE ( 5%) Size(mm): 0.1 OPAQUE MINERALS ( 5%) INCLUDES MAGN + ILMENITE; GLASS ( 30%) OXIDIZED* Alteration - OTHER GLASS IS OXIDIZED* Vesicles - Size(mm): 1-6 Percent: 10 Filling: EMPTY,CLAY.MIN, Shape: IRREGULAR Filling: ZEOLITES VESICLES ARE EMPTY WITH SOME CLAYS + ZEOLITES ON MARGINS; Size(mm): 0.1-0.4 Percent: 10 Filling: EMPTY,CLAY.MIN, Filling: ZEOLITES VESICLES ARE EMPTY WITH SOME CLAYS + ZEOLITES ON MARGINS* Leg : 59 Top/Bottom Interval(mm): 680/ 720 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 423.00 Rock Type: IGNEOUS Core: 48 Sample Midpoint(m) : 426.70 Sect/Pc #: 3/PCE 5C ROCK = APHYRIC BASALT; Texture: APHYRIC,PILOTAXITIC; Where sampled: FLOW INTERIOR CENTER OF FLOW,FLOW BANDING CROSSES CORE AT 45 DEGREES,SMALL VESICLES ALIGNED IN CHAINS PARALLEL TO FLOW BANDING* Phenocrysts- OLIVINE ( TR%) Size(mm): 0.2 PLAGIOCLASE ( TR%) Size(mm): 0.4 CLINOPYROXENE ( TR%) Size(mm): 0.3 Groundmass - OLIVINE ( 0%) PLAGIOCLASE ( 40%) CLINOPYROXENE ( 10%) OPAQUE MINERALS ( 5%) INCLUDES MAGN + ILMENITE; GLASS ( 17%) TOO FINE TO IDENTIFY* Alteration - CLAY MINERALS Location: GROUNDMASS Replacing: GROUNDMASS Vesicles - Size(mm): 20-40 Percent: 8 Filling: EMPTY Shape: SPHERICAL Size(mm): 0.2 Percent: 20 Filling: EMPTY Shape: IRREGULAR Leg : 59 Top/Bottom Interval(mm): 1100/1130 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 423.00 Rock Type: UNIDENTIFIED Core: 48 Sample Midpoint(m) : 428.62 Sect/Pc #: 4/PCE 1K ROCK = VOLCANICLASTIC BRECCIA CLASTS ARE PLAG-CPX-OL PHYRIC BASALTS AND BASALTIC PUMICE CEMENTED IN A MATRIX OF ZEOLITES AND SOME CARBONATE; Phenocrysts- PLAGIOCLASE CLINOPYROXENE OLIVINE Alteration - CALCITE Location: MATRIX BRECCIA CEMENTED BY ZEOLITES + SOME CALCITE; ZEOLITE Location: MATRIX BRECCIA CEMENTED BY ZEOLITES + SOME CALCITE* Leg : 59 Top/Bottom Interval(mm): 750/ 800 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 442.00 Rock Type: UNIDENTIFIED Core: 50 Sample Midpoint(m) : 442.78 Sect/Pc #: 1/PCE 1I ROCK = VOLCANICLASTIC BRECCIA CLASTS ARE PLAG-CPX-OL PHYRIC BASALTS AND BASALTIC PUMICE CEMENTED IN A MATRIX OF ZEOLITES (PHILLIPSITE?); Phenocrysts- PLAGIOCLASE OLIVINE CLINOPYROXENE Alteration - ZEOLITE CLASTS ARE CEMENTED TOGETHER BY ZEOLITES (PHILLIPSITE?)* Leg : 59 Top/Bottom Interval(mm): 800/ 820 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 442.00 Rock Type: UNIDENTIFIED Core: 50 Sample Midpoint(m) : 445.81 Sect/Pc #: 3/PCE 10 ROCK = GRANODIORITE-QUARTZ DIORITE THIS IS A CLAST FROM VOLCANICLASTIC BRECCIA; Texture: GRANITIC,MICROGRAPHIC; Where sampled: CLAST IN VOLCANICLASTIC BRECCIA FROM A BATHOLITH* Groundmass - OLIVINE ( 0%) PLAGIOCLASE ( 55%) Size(mm): 1 APPROX COMP AN49-45(CORE)-AN38(CENTRAL)-AN38-24 (THIN RIM); CLINOPYROXENE ( TR%) PARTLY ALTERED TO HORNBLENDE; OPAQUE MINERALS ( 5%) INCLUDES MAGN + ILMENITE; GLASS ( 0%) ORTHOPYROXENE ( TR%) ALTERATION RIM TO HORNBLENDE; QUARTZ ( 15%) Size(mm): 2 ALKALI FELDSPAR ( 5%) IDENTITY UNCERTAIN,GRAPHIC AND MYRMEKITIC INTERGROWTHS WITH QUARTZ; APATITE ( 1%) HORNBLENDE ( 20%) Size(mm): 1 PLUS A CLEAR AMPHIBOLE? = TREMOLITE* Alteration - HORNBLENDE Replacing: CPX,OPX CPX ALTERED IN PART AND RIMS OF OPX ARE ALTERED TO HORNBLENDE* Leg : 59 Top/Bottom Interval(mm): 380/ 400 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 451.50 Rock Type: UNIDENTIFIED Core: 51 Sample Midpoint(m) : 451.89 Sect/Pc #: 1/PCE 1E ROCK = PLAG MODERATELY PHYRIC ANDESITE NOT CERTAIN IF ANDESITE,A CLAST IN VOLCANICLASTIC BRECCIA; Texture: MODERATELY PORPHYRITIC,TRACHYTIC; Where sampled: FLOW INTERIOR A CLAST IN VOLCANICLASTIC BRECCIA* Phenocrysts- OLIVINE ( 0%) PLAGIOCLASE ( 5%) Size(mm): 0.5 PERCENTAGE UNCERTAIN,SEVERAL ALTERED PHENOS, GLOMEROCRYSTS; CLINOPYROXENE Size(mm): 1.5 ONE ALTERED XTL; SPINEL ( 0%) Groundmass - OLIVINE ( 0%) PLAGIOCLASE ( 5%) Size(mm): 0.1 APPROX COMP AN28-36; GLASS ( 30%) ALTERED* Alteration - CALCITE Location: VESICLES ZEOLITE Location: VESICLES Replacing: PLAG,CPX,GLASS SEVERAL ALTERED PHENOS OF PLAG AND ONE ALTERED XTL OF CPX BUT ALTERATION IS NOT SPECIFICALLY NOTED* Vesicles - Size(mm): .05-0.25 Percent: 60 Filling: ZEOLITES, Shape: SPHERICAL Filling: CALCITE Leg : 59 Top/Bottom Interval(mm): 500/ 510 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 451.50 Rock Type: TUFF Core: 51 Sample Midpoint(m) : 455.01 Sect/Pc #: 3/PCE 1I ROCK = VITRIC TUFF ALTERED VOLCANIC ASH WITH MN DENORITES; Leg : 59 Top/Bottom Interval(mm): 580/ 600 Describer: Ishi, T. Hole: 448 Top of Core Depth(m) : 451.50 Rock Type: TUFF Core: 51 Sample Midpoint(m) : 455.09 Sect/Pc #: 3/PCE 1J ROCK = VITRIC TUFF; Groundmass - PLAGIOCLASE ( 3%) Size(mm): 0.1 CLINOPYROXENE ( <1%) Size(mm): 0.08 GLASS ALTERED VOLCANIC ASH,BROWN GLASS; ORTHOPYROXENE ( <1%) Size(mm): 0.4 IDENTITY UNCERTAIN; OTHER ( 3%) IDENTITY UNKNOWN* Leg : 59 Top/Bottom Interval(mm): 290/ 320 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 461.00 Rock Type: IGNEOUS Core: 52 Sample Midpoint(m) : 461.31 Sect/Pc #: 1/PCE 1I ROCK = APHYRIC BASALT SECTION IS FRESH; Texture: APHYRIC,HYALOPILITIC; Where sampled: FLOW INTERIOR* Phenocrysts- OLIVINE ( TR%) Size(mm): 0.6 PLAGIOCLASE ( TR%) Size(mm): 1.2 Groundmass - OLIVINE ( 5%) Size(mm): 0.1 PLAGIOCLASE ( 40%) Size(mm): 0.2 CLINOPYROXENE ( 10%) Size(mm): 0.1 OPAQUE MINERALS ( 5%) Morphology: ACICULAR,SKELETAL INCLUDES MAGN + ILMENITE; GLASS ( 15%) Vesicles - Size(mm): 0.1-0.4 Percent: 15 Filling: EMPTY Shape: IRREGULAR Size(mm): 0.5-2 Percent: 10 Filling: EMPTY Shape: SPHERICAL Leg : 59 Top/Bottom Interval(mm): 640/ 660 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 461.00 Rock Type: IGNEOUS Core: 52 Sample Midpoint(m) : 463.15 Sect/Pc #: 2/PCE 3F ROCK = PLAG SPARSELY PHYRIC BASALT; Texture: SPARSELY PORPHYRITIC; Where sampled: FLOW INTERIOR* Phenocrysts- OLIVINE ( 0%) PLAGIOCLASE ( 1%) Size(mm): 1 GLOMEROCRYST (3 MM)* Groundmass - OLIVINE ( 2%) Size(mm): 0.1 PLAGIOCLASE ( 35%) Size(mm): 0.2 CLINOPYROXENE ( 23%) Size(mm): 0.2 OPAQUE MINERALS ( 5%) INCLUDES MAGN + ILMENITE; GLASS ( 20%) Alteration - OTHER SLIGHT OXIDATION* Vesicles - Size(mm): 1 Percent: 2 Filling: ZEOLITES Shape: SPHERICAL Size(mm): 0.1-0.3 Percent: 13 Filling: EMPTY Shape: IRREGULAR Leg : 59 Top/Bottom Interval(mm): 640/ 660 Describer: Ishi, T. Hole: 448 Top of Core Depth(m) : 470.50 Rock Type: IGNEOUS Core: 53 Sample Midpoint(m) : 472.65 Sect/Pc #: 2/PCE 1J ROCK = PLAG-CPX SPARSELY PHYRIC BASALT; Texture: SPARSELY PORPHYRITIC,HYALOPILITIC,GROUNDMASS IS FINE; Where sampled: FLOW INTERIOR* Phenocrysts- PLAGIOCLASE ( 1%) Size(mm): 0.4-0.6 Morphology: EUHEDRAL APPROX COMP AN48 CLINOPYROXENE ( RARE%) Size(mm): 0.4 Groundmass - PLAGIOCLASE ( 22%) Morphology: LATHS,EUHEDRAL-SUBHEDRAL APPROX COMP AN50; CLINOPYROXENE ( 27%) Morphology: SUBHEDRAL OPAQUE MINERALS ( 6%) INCLUDES MAGN + ILMENITE; GLASS ( 10%) Alteration - CLAY MINERALS ( 5%) Replacing: GLASS Vesicles - Size(mm): 0.1-1 Percent: 30 Shape: IRREGULAR, Shape: SPHERICAL VESICLES 0.1-0.4 MM ARE IRREGULAR AND VESICLES 0.5-1 MM ARE SPHERICAL* Leg : 59 Top/Bottom Interval(mm): 1290/1310 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 508.50 Rock Type: UNIDENTIFIED Core: 57 Sample Midpoint(m) : 509.80 Sect/Pc #: 1/PCE 9C ROCK = PLAG-CPX PHYRIC BASALT THIN SECTION IS OF A BASALT CLAST IN VOLCANICLASTIC BRECCIA; Texture: PORPHYRITIC,HYALOPILITIC-PILOTAXITIC; Where sampled: FLOW INTERIOR BASALT CLAST FROM BRECCIA* Phenocrysts- OLIVINE ( 0%) PLAGIOCLASE ( 15%) Size(mm): 1.2 CORES OF PLAG 90% ALTERED TO CELADONITE(?); CLINOPYROXENE ( 1%) Size(mm): 0.5 Groundmass - OLIVINE ( 0%) PLAGIOCLASE ( 50%) Size(mm): 0.4 THESE ARE FRESH; CLINOPYROXENE ( 5%) Size(mm): 0.2 OPAQUE MINERALS ( 3%) INCLUDES MAGN + ILMENITE; GLASS ( 25%) HIGHLY ALTERED TO CELADONITE? OR GREEN SMEC; COPPER ( 1%) Size(mm): 0.1-1 NATIVE COPPER ASSOCIATED WITH POCKETS OF DISSEMINATED OXIDES FROM ALTERED SULFIDES?--25 TO 75% OF POCKET = COPPER* Alteration - CLAY MINERALS ( 40%) Replacing: PLAG,GLASS EXTENSIVE--40% OF SLIDE GREEN=CELADONITE?,CORES OF PLAG PHENOS AND GLASS IN THE GROUNDMASS ARE ALTERED* Vesicles - Percent: 0 Leg : 59 Top/Bottom Interval(mm): 50/ 80 Describer: Ishi, T. Hole: 448 Top of Core Depth(m) : 508.50 Rock Type: UNIDENTIFIED Core: 57 Sample Midpoint(m) : 510.07 Sect/Pc #: 2/PCE 1A ROCK = CPX-PLAG MODERATELY PHYRIC BASALT THIN SECTION IS OF A BASALT CLAST IN VOLCANICLASTIC BRECCIA--THIS DESCRIPTION IS OF THE CLAST; Texture: MODERATELY PORPHYRITIC,HYALOPILITIC; Where sampled: CLAST OF BASALT IN BRECCIA* Phenocrysts- OLIVINE PLAGIOCLASE ( 1%) Size(mm): 0.3-0.7 CLINOPYROXENE ( 2%) Size(mm): 0.4-1.5 Morphology: SUBHEDRAL SOME XTLS SHOW HOURGLASS STRUCTURES; SPINEL ORTHOPYROXENE ( RARE%) Size(mm): 0.1-0.4 Morphology: EUHEDRAL-SUBHEDRAL IDENTITY UNCERTAIN,PSEUDOMORPH* Groundmass - OLIVINE PLAGIOCLASE ( 30%) Size(mm): 0.05-0.2 Morphology: LATHS APPROX "37& AN66; CLINOPYROXENE ( 10%) Size(mm): 0.03-0.2 Morphology: SUBHEDRAL OPAQUE MINERALS ( 5%) Size(mm): 0.02-0.1 INCLUDES MAGN + ILMENITE; GLASS ( 27%) ORTHOPYROXENE ( R%) Size(mm): 0.1 IDENTITY UNCERTAIN; QUARTZ IDENTITY UNCERTAIN; ALKALI FELDSPAR IDENTITY UNCERTAIN; HORNBLENDE Alteration - CARBONATE ( 5%) CLAY MINERALS ( 3%) ZEOLITE ( 2%) Vesicles - Size(mm): 0.5-3 Percent: 15 Leg : 59 Top/Bottom Interval(mm): 50/ 81 Describer: Ishi, T. Hole: 448 Top of Core Depth(m) : 508.50 Rock Type: UNIDENTIFIED Core: 57 Sample Midpoint(m) : 510.07 Sect/Pc #: 2/PCE 1A ROCK = VOLCANICLASTIC BRECCIA MATRIX THIN SECTION IS OF A BASALT CLAST IN VOLCANICLASTIC BRECCIA--THIS DESCRIPTION IS OF THE BRECCIA MATRIX; Texture: APHANITIC; Where sampled: BRECCIA MATRIX* Phenocrysts- OLIVINE ( 0%) PLAGIOCLASE CLINOPYROXENE SPINEL ( 0%) Groundmass - OLIVINE ( 0%) PLAGIOCLASE CLINOPYROXENE MAGNETITE ILMENITE GLASS ORTHOPYROXENE Leg : 59 Top/Bottom Interval(mm): 990/1020 Describer: Scott, R. Hole: 448 Top of Core Depth(m) : 508.50 Rock Type: UNIDENTIFIED Core: 57 Sample Midpoint(m) : 511.01 Sect/Pc #: 2/PCE 7 ROCK = PLAG-HY-SPINEL PHYRIC ANDESITE BASALTIC ANDESITE,THIN SECTION IS OF AN ANDESITE CLAST FOUND IN VOLCANICLASTIC BRECCIA; Texture: PORPHYRITIC; Where sampled: ANDESITE CLAST IN VOLCANICLASTIC BRECCIA* Phenocrysts- PLAGIOCLASE ( 20%) Size(mm): 1-2.0 APPROX COMP AN76,GLOMEROCRYSTS IN PART; SPINEL ( 1%) Size(mm): 0.5-2 CORRODED; HYPERSTHENE ( 5%) Size(mm): 0.3-0.5 Groundmass - OLIVINE ( 0%) PLAGIOCLASE ( 40%) Size(mm): 0.3 CLINOPYROXENE ( 5%) Size(mm): 0.1 OPAQUE MINERALS ( 5%) INCLUDES MAGN + ILMENITE; GLASS ( 30%) FINE-GRAINED CRYSTALLITES IN PART,ALTERED TO GREEN CLAY = CELADONITE?? THROUGHOUT ROCK* Alteration - CLAY MINERALS ( >30%) Replacing: GLASS GLASS ALTERED TO CELADONITE? OR OTHER GREEN CLAY* Leg : 59 Top/Bottom Interval(mm): 180/ 210 Describer: Ishi, T. Hole: 448 Top of Core Depth(m) : 518.00 Rock Type: IGNEOUS Core: 58 Sample Midpoint(m) : 522.70 Sect/Pc #: 4/PCE 1C ROCK = PLAG-CPX-OPX PHYRIC BASALT; Texture: PORPHYRITIC,HYALOPILITIC; Where sampled: FLOW INTERIOR* Phenocrysts- PLAGIOCLASE ( 10%) Size(mm): 0.4-3.0 APPROX COMP AN64,FRESH; CLINOPYROXENE ( 2%) Size(mm): 0.4-1.0 Morphology: SUBHEDRAL FRESH; ORTHOPYROXENE ( <1%) Size(mm): 0.4-0.7 Morphology: SUBHEDRAL FRESH,2V = -* Groundmass - PLAGIOCLASE ( 20%) Size(mm): 0.05-0.4 Morphology: LATHS,EUHEDRAL APPROX COMP AN60; CLINOPYROXENE ( 12%) Size(mm): 0.05-0.3 Morphology: SUBHEDRAL OPAQUE MINERALS ( 4%) Size(mm): 0.01-0.05 INCLUDES MAGN + ILMENITE; GLASS ( 10%) ORTHOPYROXENE ( 1%) Size(mm): 0.2-0.4 Morphology: SUBHEDRAL FRESH,MICROPHENOCRYSTS?* Alteration - OTHER ( 5%) Vesicles - Size(mm): 0.4-5.0 Percent: 35 Leg : 59 Top/Bottom Interval(mm): 440/ 470 Describer: Ishi, T. Hole: 448 Top of Core Depth(m) : 518.00 Rock Type: IGNEOUS Core: 58 Sample Midpoint(m) : 524.46 Sect/Pc #: 5/PCE 3F ROCK = PLAG-CPX PHYRIC BASALT; Texture: PORPHYRITIC,HYALO-OPHITIC,GROUNDMASS IS FINE; Where sampled: FLOW INTERIOR* Phenocrysts- PLAGIOCLASE ( 15%) Size(mm): 0.4-3.6 Morphology: EUHEDRAL-SUBHEDRAL APPROX COMP AN60; CLINOPYROXENE ( 1%) Size(mm): 0.4-7.0 Morphology: SUBHEDRAL 2VZ = 50,GABBROIC INCLUSION; ORTHOPYROXENE ( RARE%) Size(mm): TO 0.5 IDENTITY UNCERTAIN* Groundmass - PLAGIOCLASE ( 20%) Morphology: LATHS,SUBHEDRAL APPROX COMP AN46; CLINOPYROXENE ( 10%) OPAQUE MINERALS ( 5%) INCLUDES MAGN + ILMENITE; GLASS ( 10%) ORTHOPYROXENE ( RARE%) Size(mm): 0.3 Morphology: SUBHEDRAL PSEUDOMORPH* Alteration - CARBONATE ( 1%) Location: VESICLES CLAY MINERALS ( 6%) Replacing: GLASS ZEOLITE ( 2%) Location: VESICLES Vesicles - Size(mm): 5.0 Percent: 30 Filling: CARB,ZEOLITES Leg : 59 Top/Bottom Interval(mm): 10/ 40 Describer: Ishi, T. Hole: 448 Top of Core Depth(m) : 527.50 Rock Type: IGNEOUS Core: 59 Sample Midpoint(m) : 527.53 Sect/Pc #: 1/PCE 1A ROCK = PLAG-CPX PHYRIC BASALT; Texture: PORPHYRITIC,HYALO-OPHITIC,GROUNDMASS IS FINE; Where sampled: FLOW INTERIOR* Phenocrysts- PLAGIOCLASE ( 15%) Size(mm): 0.4-3.0 Morphology: EUHEDRAL-SUBHEDRAL APPROX COMP AN68; CLINOPYROXENE ( 2%) Size(mm): 0.4-1.0 Morphology: SUBHEDRAL ORTHOPYROXENE ( RARE%) Size(mm): 0.4 IDENTITY UNCERTAIN,PSEUDOMORPH?* Groundmass - PLAGIOCLASE ( 20%) Morphology: EUHEDRAL-SUBHEDRAL APPROX COMP AN50; CLINOPYROXENE ( 15%) Morphology: SUBHEDRAL OPAQUE MINERALS ( 5%) INCLUDES MAGN + ILMENITE; GLASS ( 8%) ORTHOPYROXENE ( R%) PSEUDOMORPHS* Alteration - CLAY MINERALS ( 3%) Replacing: GLASS ZEOLITE ( 2%) Location: VESICLES Vesicles - Size(mm): 0.2-5.0 Percent: 30 Filling: EMPTY,ZEOLITES Leg : 59 Top/Bottom Interval(mm): 1170/1200 Describer: Ishi, T. Hole: 448 Top of Core Depth(m) : 527.50 Rock Type: IGNEOUS Core: 59 Sample Midpoint(m) : 528.69 Sect/Pc #: 1/PCE 3J ROCK = PLAG-CPX-OPX PHYRIC BASALT; Texture: PORPHYRITIC,HYALO-OPHITIC; Where sampled: FLOW INTERIOR* Phenocrysts- PLAGIOCLASE ( 10%) Size(mm): 0.4-2.0 Morphology: EUHEDRAL-SUBHEDRAL APPROX COMP AN60; CLINOPYROXENE ( 2 %) Size(mm): 0.4-1.5S Morphology: UBHEDRAL ORTHOPYROXENE ( 1%) Size(mm): 0.5-2.6 PSEUDOMORPHED AND FRESH (2VX = 70)* Groundmass - PLAGIOCLASE ( 20%) Size(mm): 0.05-0.1 Morphology: LATHS,SUBHEDRAL APPROX COMP AN50; CLINOPYROXENE ( 15%) Size(mm): 0.05-0.1 Morphology: SUBHEDRAL OPAQUE MINERALS ( 6%) Size(mm): 0.01-0.05 INCLUDES MAGN + ILMENITE; GLASS ( 10%) ORTHOPYROXENE ( 1%) Size(mm): 0.03-0.3 Morphology: SUBHEDRAL FRESH ONE AND PSEUDOMORPHS* Alteration - CARBONATE CLAY MINERALS ( 5%) Replacing: GLASS ZEOLITE ( 1%) Location: VESICLES Vesicles - Size(mm): 0.3-3 Percent: 30 Filling: EMPTY,ZEOLITES Shape: IRREGULAR Leg : 59 Top/Bottom Interval(mm): 520/ 550 Describer: Ishi, T. Hole: 448 Top of Core Depth(m) : 527.50 Rock Type: IGNEOUS Core: 59 Sample Midpoint(m) : 529.53 Sect/Pc #: 2/PCE 2G ROCK = PLAG-CPX-OPX PHYRIC BASALT ISLAND ARC TYPE THOLEIITIC BASALT (ANDESITE?); Texture: PORPHYRITIC,HYALO-OPHITIC; Where sampled: PILLOW INTERIOR OR FLOW INTERIOR* Phenocrysts- OLIVINE ( 0%) PLAGIOCLASE ( 15%) DIMENSIONS ARE 2.0 MM X 2.5 MM,APPROX COMP AN56-57; CLINOPYROXENE ( 2%) Size(mm): 1.0 Morphology: EUHEDRAL-SUBHEDRAL SPINEL ( 0%) ORTHOPYROXENE ( <1%) Morphology: EUHEDRAL-SUBHEDRAL DIMENSIONS ARE 0.6 MM X 0.7 MM* Groundmass - OLIVINE ( 0%) PLAGIOCLASE ( 45%) Size(mm): 0.2-0.4 APPROX COMP AN38; CLINOPYROXENE ( 3%) Size(mm): 0.1-0.2 AUGITE AND PIGEONITE(?); OPAQUE MINERALS ( 7%) INCLUDES MAGN + ILMENITE; GLASS ( 25%) BROWN GLASSES; ORTHOPYROXENE ( 2%) Size(mm): 0.2 Morphology: EUHEDRAL-SUBHEDRAL RARELY WITH A CPX RIM; QUARTZ ( 0%) ALKALI FELDSPAR ( 0%) Alteration - CLAY MINERALS ( 5%) Location: VESICLES,VEIN BROWNISH-GREEN* Vesicles - Percent: 15 Shape: SPHERICAL Leg : 59 Top/Bottom Interval(mm): 460/ 500 Describer: Ishi, T. Hole: 448 Top of Core Depth(m) : 546.50 Rock Type: IGNEOUS Core: 61 Sample Midpoint(m) : 548.48 Sect/Pc #: 2/PCE 1G ROCK = PLAG-CPX-OPX PHYRIC BASALT ISLAND ARC TYPE THOLEIITIC BASALT (ANDESITE?); Texture: PORPHYRITIC,HYALO-OPHITIC; Where sampled: PILLOW INTERIOR OR FLOW INTERIOR* Phenocrysts- OLIVINE ( 0%) PLAGIOCLASE ( 15%) Size(mm): 0.7-2.0 APPROX COMP AN58; CLINOPYROXENE ( 2%) Size(mm): 0.3-1.0 Morphology: SUBHEDRAL SPINEL ( 0%) ORTHOPYROXENE ( 1%) Size(mm): 0.5-0.7 Morphology: SUBHEDRAL PSEUDOMORPHED BUT NOT BY OL,2VX = 80* Groundmass - PLAGIOCLASE ( 40%) Size(mm): 0.1-0.3 APPROX COMP AN36; CLINOPYROXENE ( 10%) Size(mm): 0.05-0.3 OPAQUE MINERALS ( 3%) Size(mm): 0.03-0.1 INCLUDES MAGN + ILMENITE; GLASS ( 25%) ORTHOPYROXENE ( <1%) Size(mm): 0.3 Morphology: SUBHEDRAL NO CPX RIMS* Alteration - CARBONATE ( 3%) Location: CAVITY Replacing: PLAG REPLACING SOME PLAG; CLAY MINERALS ( 1%) Vesicles - Percent: 15 Leg : 59 Top/Bottom Interval(mm): 510/ 540 Describer: Zakariakze, G. Hole: 448 Top of Core Depth(m) : 546.50 Rock Type: IGNEOUS Core: 61 Sample Midpoint(m) : 550.03 Sect/Pc #: 3/PCE 3A ROCK = PLAG-CPX-OPX PHYRIC BASALT ISLAND ARC TYPE THOLEIITE; Texture: PORPHYRITIC,INTERSERTAL-SUBOPHITIC; Where sampled: FLOW INTERIOR* Phenocrysts- OLIVINE ( 0%) PLAGIOCLASE ( 10%) Size(mm): 1-1.5 Morphology: SUBHEDRAL,TABULAR,PRISMATIC APPROX COMP AN72-75; CLINOPYROXENE ( 1-2%) Size(mm): 0.5 ORTHOPYROXENE ( 0.5%) Size(mm): 0.5 Morphology: ELONGATE PROSMS PERCENTAGE UNCERTAIN* Groundmass - OLIVINE ( 4%) Size(mm): 0.5 Morphology: ELONGATE PROSMS PSEUDOMORPHS; PLAGIOCLASE ( 40%) Morphology: ELONGATE LATHS 0.25 MM AVERAGE,APPROX COMP AN68; CLINOPYROXENE ( 20%) Morphology: ANHEDRAL GRAINS 0.2 MM AVERAGE; OPAQUE MINERALS ( 5%) Size(mm): 0.05 Morphology: TRIANGULAR + SQUARE SECTIONS GLASS (20-22%) COMPLETELY ALTERED* Alteration - COMBINATION Replacing: PLAG,GLASS,OPX,OL INCLUDES CELADONITE + SMECTITE* |
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]
Please see NOAA's privacy and disclaimer information. Send questions or comments to mgg.info@noaa.gov.
|