Leg : 60 Top/Bottom Interval(mm): 440/ 470 Describer: Natland, J. Hole: 459B Top of Core Depth(m) : 558.50 Rock Type: IGNEOUS Core: 60 Sample Midpoint(m) : 558.96 Sect/Pc #: 1/PCE 1 ROCK = APHYRIC BASALT; ALTERED; Texture: MICROLITIC-SPHERULITIC TEXTURE IS QUITE VARIABLE IN THIS THIN SECTION, SPHERULITIC ON ONE SIDE-MICROLITIC ON THE OTHER; Where sampled: TOP EDGE OF FLOW OR SILL* Phenocrysts- COMBINATION SOME COARSER GRAINED PATCHES WITH CPX AND PLAG,BUT NO ACTUAL PHENOCRYSTS* Groundmass - PLAGIOCLASE ( 15%) Size(mm): 0.1-0.6 Morphology: SKELETAL,ELONGATE MICROLITES AND SOME SPHERULITES; CLINOPYROXENE ( 5%) Morphology: FIBROUS SPHERULITES NOT EASY TO ESTIMATE ABUNDANCE-CONTAINS MUCH GLASS BETWEEN THE FIBERS; MAGNETITE ( 2%) Morphology: CUBIC FAIRLY ABUNDANT; MICROCRYST GROUNDMASS MICROCRYSTALLINE TO GLASSY MESOSTASIS,GENERALLY ALTERED TO ORANGE CLAYS* Alteration - CLAY MINERALS Replacing: MICROXLN Vesicles - Size(mm): 0.1-0.5 Percent: 25 Location: THROUGHOUT Filling: CLAY-LINED Shape: IRREGULAR Leg : 60 Top/Bottom Interval(mm): 1130/1150 Describer: Sharaskin, A. Hole: 459B Top of Core Depth(m) : 558.50 Rock Type: IGNEOUS Core: 60 Sample Midpoint(m) : 559.64 Sect/Pc #: 1/PCE 10 ROCK = APHYRIC BASALT COARSE GRAINED BASALT OR FINE GRAINED DIABASE; Texture: SUBOPHITIC-INTERSERTAL* Groundmass - PLAGIOCLASE ( 30%) CLINOPYROXENE ( 22%) GLASS ( 19%) DEVITRIFIED,ALTERED; TITANOMAGNETITE ( 3%) OLIVINE ( 1%) SIZE UNCERTAIN-SLIDE IS TOO THICK* Alteration - FERROUS OXIDE ( 30%) Location: SCATTERED AND Replacing: GLASS,PLAG,CPX,CARB Location: FILL VESICLES CONTAINS ORANGE-BROWN STUFF* Vesicles - Size(mm): 0.2-4.0 Percent: 25 Location: THROUGHOUT Filling: CARB FILLING BY ORANGE-BROWN FILM-LIKE NEARLY ISOTROPIC SUBSTANCE(PALAGONITE?),IT COULD BE AS WELL OVER- COOKED EPOXY FILM* Leg : 60 Top/Bottom Interval(mm): 280/ 310 Describer: Sharaskin, A. Hole: 459B Top of Core Depth(m) : 558.50 Rock Type: IGNEOUS Core: 60 Sample Midpoint(m) : 560.30 Sect/Pc #: 2/PCE 3B ROCK = APHYRIC BASALT; Texture: SPHERULITIC-SUBOPHITIC,INTERSERTAL; Phenocrysts- CLINOPYROXENE Size(mm): 0.1-0.4 APPROX COMP AUG.; PLAGIOCLASE Size(mm): 0.2-0.3 APPROX COMP AN60-70,SCATTERED MICROPHENOS,RATIO OF PLAG TO CPX IS 1:9* Groundmass - PLAGIOCLASE ( 50%) Size(mm): 0.05-0.2 HIGH UNDERCOOLING FORM; CLINOPYROXENE ( 20%) Size(mm): 0.05-0.1 HIGH UNDERCOOLING FORM; GLASS ( 15%) DEVITRIFIED AND PARTLY TO BADLY ALTERED; TITANOMAGNETITE ( 1%) HIGH UNDERCOOLING FORM* Alteration - CARBONATE Location: VESICLES COMBINATION Replacing: GLASS,CRYSTALLITES INCLUDES CLAY.MINS + FE-OXIDES* Vesicles - Size(mm): 0.1-1.0 Percent: 15 Location: THROUGHOUT Filling: BROWN CLAY,CARB Shape: ROUND TO Shape: IRREGULAR FILLING PARTLY BY BROWN CLAY,RARELY BY CARBONATE* Leg : 60 Top/Bottom Interval(mm): 960/ 980 Describer: Natland, J. Hole: 459B Top of Core Depth(m) : 558.50 Rock Type: IGNEOUS Core: 60 Sample Midpoint(m) : 560.97 Sect/Pc #: 2/PCE 8 ROCK = APHYRIC BASALT; Texture: INTERSERTAL,APHYRIC; Where sampled: FLOW INTERIOR* Groundmass - MICROCRYST GROUNDMASS ( 40%) CRYPTOCRYSTALLINE WITH SKELETAL PLAG AND TITANOMAGNETITE AND SPHERULITIC CPX; PLAGIOCLASE ( 30%) Size(mm): 0.1-1.0 Morphology: EUHEDRAL-SKELETAL,PATCHY APPROX COMP AN70-75; CLINOPYROXENE ( 20%) Size(mm): 0.1-0.5 Morphology: GRANULAR 2VX OF 55,APPROX COMP AUG.; MAGNETITE ( 2%) Morphology: CUBIC-ELONGATE AND SKELETAL Alteration - CARBONATE ( 5%) Location: SCATTERED Replacing: MESOSTASIS CLAY MINERALS Replacing: MESOSTASIS IN CRYPTOCRYSTALLINE MATERIAL,POORLY DEFINED; ZEOLITE ( TR%) ASSOCIATED WITH FE.HYDRX NEAR VESICLES; FERROUS HYDROX MINS ( TR%) Location: NEAR VESICLES Vesicles - Size(mm): 0.3-0.5 Percent: 3 Location: SCATTERED Filling: NONE Shape: IRREGULAR Leg : 60 Top/Bottom Interval(mm): 1060/1070 Describer: Sharaskin, A. Hole: 459B Top of Core Depth(m) : 568.00 Rock Type: IGNEOUS Core: 61 Sample Midpoint(m) : 569.07 Sect/Pc #: 1/PCE 10 ROCK = QUARTZ DIABASE; Texture: SUBOPHITIC,INTERGRANULAR,MICROPEGMATIC; Where sampled: SILL INTERIOR* Groundmass - PLAGIOCLASE ( 67%) Size(mm): 0.1-1.0 APPROX COMP AN50-55; GLASS ( 20%) DEVITRIFIED AND BADLY ALTERED; CLINOPYROXENE ( 7%) Size(mm): 0.05-0.8 PIGEONITE; TITANOMAGNETITE ( 3%) Size(mm): 0.01-0.2 ALKALI FELDSPAR ( 2%) FORMS INTERSTITIAL MICROPEGMATIC INTERGROWTHS WITH QUARTZ; QUARTZ ( 1%) Size(mm): 0.01-0.05 Alteration - CLAY MINERALS ( 14%) Location: VESICLES Replacing: GLASS COMBINATION ( 1%) Location: INTERSTITIAL Replacing: GLASS,MICROPEGMATIC Location: GLASS Replacing: AGGREGATES INCLUDES ZEOLITES + QUARTZ* Vesicles - Size(mm): 0.3-1.0 Percent: 3 Location: THROUGHOUT Filling: CLAY,ZEOLITE, Shape: IRREGULAR Filling: QUARTZ Leg : 60 Top/Bottom Interval(mm): 1260/1290 Describer: Sharaskin, A. Hole: 459B Top of Core Depth(m) : 568.00 Rock Type: IGNEOUS Core: 61 Sample Midpoint(m) : 569.28 Sect/Pc #: 1/PCE 13 ROCK = DOLERITE SLIDE IS TOO THIN; Texture: SUBOPHITIC,INTERSERTAL* Groundmass - PLAGIOCLASE ( 57%) Size(mm): 0.5-1.5 CLINOPYROXENE ( 26%) Size(mm): 0.1-1.0 GLASS ( 10%) TOTALLY ALTERED TO CLAYS AND CARB; MAGNETITE ( 2%) Size(mm): <0.01 Alteration - COMBINATION ( 9%) Location: GROUNDMASS, Replacing: INTERSTITIAL PHASES Location: VESICLES INCLUDES CLAY.MINS + FE.OXIDES,PETROLOGIST GIVES PERCENTAGE HERE AS 60%; CARBONATE ( 6%) Location: GROUNDMASS, Replacing: INTERSTITIAL PHASES Location: VESICLES PETROLOGIST GIVES PERCENTAGE CARB AS 40%, ICD SAYS SLIDE IS SIMILAR TO PREVIOUS SLIDE; ZEOLITE ( 1-2%) SMALL SPHERULITES IN VESICLES* Vesicles - Size(mm): 0.3-2.0 Percent: 5 Location: THROUGHOUT Filling: CLAY.MINS,FE.OX Shape: IRREGULAR Filling: CARB CARBONATE(?) IN SOME ESPECIALLY LARGE VESICLES* Leg : 60 Top/Bottom Interval(mm): 690/ 700 Describer: Sharaskin, A. Hole: 459B Top of Core Depth(m) : 568.00 Rock Type: IGNEOUS Core: 61 Sample Midpoint(m) : 570.20 Sect/Pc #: 2/PCE 8 ROCK = DOLERITE; Texture: SUBOPHITIC,INTERSERTAL* Phenocrysts- CLINOPYROXENE ( <1%) Size(mm): TO 2.5 Morphology: EUHEDRAL SINGLE GLOMEROCRYST IN THE THIN SECTION,APPROX COMP AUG.* Groundmass - PLAGIOCLASE ( 57%) Size(mm): TO 1.5 APPROX COMP AN70; GLASS ( 25%) ALTERED TO CLAYS; CLINOPYROXENE ( 15%) Size(mm): 0.1-1.0 APPROX COMP AUG.; MAGNETITE ( 3%) Alteration - CLAY MINERALS ( 16%) Location: VESICLES, Replacing: GLASS Location: INTERSTICES CARBONATE ( 4%) Location: VESICLES, Replacing: GLASS Location: INTERSTICES Vesicles - Size(mm): 0.1-0.5 Percent: 3 Location: THROUGHOUT Filling: CLAY + CARB Shape: IRREGULAR Leg : 60 Top/Bottom Interval(mm): 440/ 460 Describer: Sharaskin, A. Hole: 459B Top of Core Depth(m) : 577.50 Rock Type: IGNEOUS Core: 62 Sample Midpoint(m) : 577.95 Sect/Pc #: 1/PCE 4 ROCK = APHYRIC BASALT; Texture: APHYRIC,SUBOPHITIC,INTERSTITIAL* Groundmass - PLAGIOCLASE ( 51%) Size(mm): 0.2-1.0 APPROX COMP AN60; GLASS ( 23%) SLIGHTLY ALTERED DEVITRIFIED AND SOMETIMES SPHERULITIC; CLINOPYROXENE ( 14%) Size(mm): 0.05-1.0 APPROX COMP AUG.; TITANOMAGNETITE ( 2%) Morphology: SKELETAL Alteration - CLAY MINERALS ( 5-10%) Location: VESICLES AND Replacing: GLASS,PYX Location: INTERSTICES Vesicles - Size(mm): 0.3-7.0 Percent: 10 Location: THROUGHOUT Filling: CLAY Shape: IRREGULAR VESICLES PARTLY FILLED* Leg : 60 Top/Bottom Interval(mm): 240/ 270 Describer: Sharaskin, A. Hole: 459B Top of Core Depth(m) : 587.00 Rock Type: IGNEOUS Core: 63 Sample Midpoint(m) : 587.26 Sect/Pc #: 1/PCE 3 ROCK = APHYRIC BASALT; Texture: HYALOPILITIC,APHYRIC* Groundmass - GLASS ( 75%) PARTLY DEVITRIFIED AND BADLY ALTERED,PETROGRAPHER GIVES THIS PERCENTAGE AS 90%; CLINOPYROXENE ( 5%) Size(mm): 0.01-0.1 PLAGIOCLASE ( 3%) Size(mm): 0.01-0.1 MAGNETITE ( <1%) Size(mm): <0.01 Morphology: DENDRITIC Alteration - COMBINATION ( 50%) Location: FILL VESICLES Replacing: GLASS,CPX CRYSTALLITES INCLUDES CLAY.MINS + FE.HYDRX* Vesicles - Size(mm): 0.2-7.0 Percent: 10 Location: THROUGHOUT Filling: BROWN CLAY Shape: ROUND TO Shape: IRREGULAR VESICLES PARTLY FILLED* Leg : 60 Top/Bottom Interval(mm): 810/ 830 Describer: Sharaskin, A. Hole: 459B Top of Core Depth(m) : 587.00 Rock Type: IGNEOUS Core: 63 Sample Midpoint(m) : 587.82 Sect/Pc #: 1/PCE 10 ROCK = APHYRIC BASALT; Texture: HYALOPILITIC-INTERSERTAL,APHYRIC; Groundmass - GLASS ( 55%) PARTLY DEVITRIFIED AND BADLY ALTERED,PETROGRAPHER GIVES THIS PERCENTAGE AS 72%; PLAGIOCLASE ( 15%) Size(mm): 0.01-0.3 Morphology: MICROLITIC ALTERED TO CLAYS; CLINOPYROXENE ( 10%) Size(mm): 0.01-0.2 Morphology: MICROLITIC ALTERED TO CLAYS; TITANOMAGNETITE ( 3%) Size(mm): <0.01 Morphology: SKELETAL Alteration - CLAY MINERALS ( 50%) Location: THROUGHOUT Replacing: GLASS,PLAG+CPX XTLITES Vesicles - Size(mm): 0.1-3.0 Percent: 10 Location: THROUGHOUT Filling: EMPTY Shape: ROUND TO Shape: IRREGULAR MAINLY EMPTY* Leg : 60 Top/Bottom Interval(mm): 330/ 360 Describer: Sharaskin, A. Hole: 459B Top of Core Depth(m) : 596.50 Rock Type: IGNEOUS Core: 64 Sample Midpoint(m) : 596.85 Sect/Pc #: 1/PCE 2B ROCK = APHYRIC BASALT; Texture: HYALOPILITIC-INTERSERTAL,APHYRIC* Groundmass - GLASS ( 57%) TOTALLY ALTERED TO CLAYS,PETROGRAPHER GIVES PERCENTAGE AS 67%; PLAGIOCLASE ( 20%) Size(mm): 0.05-0.5 CLINOPYROXENE ( 9%) Size(mm): 0.02-0.3 TITANOMAGNETITE ( 3%) Size(mm): TO 0.05 Morphology: SKELETAL Alteration - CLAY MINERALS (60-70%) Location: THROUGHOUT Replacing: GLASS,CPX ZEOLITE ( <1%) IDENTITY UNCERTAIN* Vesicles - Size(mm): 0.5-1.5 Percent: 10 Location: THROUGHOUT Filling: EMPTY,CLAY Shape: IRREGULAR SOME CLAY-LINED* Leg : 60 Top/Bottom Interval(mm): 580/ 600 Describer: Sharaskin, A. Hole: 459B Top of Core Depth(m) : 606.00 Rock Type: IGNEOUS Core: 65 Sample Midpoint(m) : 606.59 Sect/Pc #: 1/PCE 8 ROCK = APHYRIC BASALT; Texture: HYALOPILITIC,APHYRIC* Phenocrysts- PLAGIOCLASE ( 0.7%) Size(mm): TO 0.9 Morphology: EUHEDRAL,TABULAR APPROX COMP UNKNOWN; CLINOPYROXENE ( 0.3%) Size(mm): TO 0.4 Morphology: EUHEDRAL,PRISMATIC APPROX COMP AUG.* Groundmass - GLASS ( 80%) DEVITRIFIED AND ALTERED TO CLAYS; PLAGIOCLASE ( 5%) Size(mm): TO 0.2 Morphology: MICROLITIC CLINOPYROXENE ( 3%) Size(mm): <0.1 Morphology: MICROLITIC TITANOMAGNETITE ( 1%) Morphology: DENDRITIC,ELONGATE THINLY DENDRITIC ELONGATE CRYSTALLITES* Alteration - CLAY MINERALS ( 60%) Location: VESICLES, Replacing: GLASS Location: GLASSY MATRIX CHLORITE ( TR%) Replacing: CPX MICROPHENOCRYSTS Vesicles - Size(mm): 0.05-5.0 Percent: 10 Location: SCATTERED Shape: ROUND TO Shape: IRREGULAR PARTLY FILLED BY BROWN CLAY* Leg : 60 Top/Bottom Interval(mm): 880/ 900 Describer: Sharaskin, A. Hole: 459B Top of Core Depth(m) : 606.00 Rock Type: IGNEOUS Core: 65 Sample Midpoint(m) : 606.89 Sect/Pc #: 1/PCE 10A ROCK = APHYRIC BASALT; Texture: HYALOPILITIC,APHYRIC* Groundmass - GLASS ( 42%) NEARLY OPAQUE,DARK BROWN TO BROWNISH-BLACK, PERVASIVE ALTERATION TO CLAYS,PETROGRAPHER GIVES PERCENTAGE OF GLASS AS 62%; PLAGIOCLASE ( 20%) Size(mm): 0.05-0.25 Morphology: MICROLITIC CLINOPYROXENE ( 15%) Size(mm): 0.01-0.2 Morphology: MICROLITIC MAGNETITE ( 3%) Morphology: SKELETAL,CRYSTALLINE Alteration - COMBINATION ( 60%) Location: THROUGHOUT Replacing: CPX,MAGN,GLASS, Replacing: MESOSTASIS INCLUDES CLAY.MINS + FE.HYDRX + OXIDES* Vesicles - Size(mm): 0.05-3.5 Percent: 15-20 Location: THROUGHOUT Filling: EMPTY,CLAY Shape: IRREGULAR TRACE OF CLAY FILLING SOME VESICLES* Leg : 60 Top/Bottom Interval(mm): 40/ 70 Describer: Sharaskin, A. Hole: 459B Top of Core Depth(m) : 615.50 Rock Type: IGNEOUS Core: 66 Sample Midpoint(m) : 617.06 Sect/Pc #: 2/PCE 1 ROCK = DOLERITE; Texture: SUBOPHITIC-INTERSERTAL,APHYRIC; Where sampled: FLOW OR SILL INTERIOR* Groundmass - PLAGIOCLASE ( 55%) Size(mm): 0.1-1.0 APPROX COMP AN65-70; GLASS ( 15%) CLAY MINERALS ( 15%) CLINOPYROXENE ( 10%) Size(mm): 0.05-0.7 TITANOMAGNETITE ( 5%) Size(mm): 0.05-0.4 ILMENITE ( <1%) Size(mm): <0.01 Morphology: DENDRITIC MINOR INTERSTITIAL COMPONENT; QUARTZ ( TR%) INTERSTITIAL MICROPEGMATIC INTERGROWTHS; ALKALI FELDSPAR ( TR%) INTERSTITIAL MICROPEGMATIC INTERGROWTHS; APATITE A SINGLE NEEDLE WAS OBSERVED* Alteration - CLAY MINERALS ( 15%) Location: VESICLES AND Location: INTERSTITIAL Location: MATERIAL ZEOLITE ( TR%) ID UNCERTAIN FOR ZEOLITE* Vesicles - Size(mm): 0.1-2.0 Percent: 5 Location: THROUGHOUT Filling: CLAY Shape: IRREGULAR Leg : 60 Top/Bottom Interval(mm): 30/ 40 Describer: Natland, J. Hole: 459B Top of Core Depth(m) : 615.50 Rock Type: IGNEOUS Core: 66 Sample Midpoint(m) : 618.53 Sect/Pc #: 3/PCE 1 ROCK = QUARTZ DIABASE DIABASE (ALTERED DOLERITE),TWO DESCRIPTIONS FOR THIS SECTION,THIS ONE NOT USED IN ICD; Texture: SUBOPHITIC-INTERSERTAL; Where sampled: FLOW INTERIOR* Groundmass - PLAGIOCLASE ( 45%) Morphology: PRISMATIC,EUHEDRAL APPROX COMP AN70-75,ZONED TO ABOUT AN50; CLINOPYROXENE ( 15%) Morphology: GRANULAR,ANHEDRAL APPROX COMP AUGITE; MICROCRYST GROUNDMASS ( 15%) ALTERED; QUARTZ ( 15%) SECONDARY,QUARTZ + CLAYS + ZEOLITES CONCENTRATED NEAR ONE LARGE VESICLE IN ONE PLACE,ELSEWHERE DISPERSED ZEOLITES REPLACES QUARTZ; MAGNETITE ( 5%) Size(mm): 0.1-0.3 Morphology: COARSE,SKELETAL Alteration - CLAY MINERALS ( 15%) Replacing: INTERSERTAL MESOSTASIS GREEN COLOR; QUARTZ ( 15%) Location: VESICLES Replacing: MESOSTASIS ASSOCIATED WITH CLAYS AND ZEOLITES; ZEOLITE ( 5%) Replacing: PLAG + QUARTZ WORMLIKE* Leg : 60 Top/Bottom Interval(mm): 30/ 40 Describer: Sharaskin, A. Hole: 459B Top of Core Depth(m) : 615.50 Rock Type: IGNEOUS Core: 66 Sample Midpoint(m) : 618.53 Sect/Pc #: 3/PCE 1 ROCK = QUARTZ DIABASE TWO DESCRIPTIONS FOR THIS SECTION,THIS ONE WAS USED IN ICD; Where sampled: SILL INTERIOR* Texture: SUBOPHITIC,MICROPEGMATIC,INTERGRANULAR,APHYRIC; Groundmass - PLAGIOCLASE ( 60%) Size(mm): 0.1-1.5 Morphology: LATHS APPROX COMP AN50(?); CLINOPYROXENE ( 15%) Size(mm): 0.05-0.8 PIGEONITE; GLASS ( 10%) TOTALLY REPLACED BY CLAYS(SMECTITE) AND FE.HYDRXS; QUARTZ ( 5%) Size(mm): 0.01-0.5 Morphology: SUBHEDRAL FORMS INTERSTITIAL MICROPEGMATIC INTERGROWTHS; ALKALI FELDSPAR ( 4%) ORTHOCLASE AND QUARTZ FORMING INTERSTITIAL MICROPEGMATIC INTERGROWTHS; TITANOMAGNETITE ( 2%) Size(mm): 0.01-0.2 Morphology: SKELETAL Alteration - CLAY MINERALS ( 10%) Location: VESICLES AND Replacing: GLASS,MICROPEGMATIC Location: INTERSTICES Replacing: AGGREGATES FERROUS HYDROX MINS Location: VESICLES AND Location: INTERSTICES Vesicles - Size(mm): TO 2.0 Percent: 3 Location: THROUGHOUT Filling: GREEN CLAY Shape: IRREGULAR CLAY FILLING COULD BE SMECTITE,SHAPE IS MAINLY AS SPACE BETWEEN MINERAL CRYSTALS* Leg : 60 Top/Bottom Interval(mm): 1060/1070 Describer: Sharaskin, A. Hole: 459B Top of Core Depth(m) : 625.00 Rock Type: IGNEOUS Core: 67 Sample Midpoint(m) : 626.07 Sect/Pc #: 1/PCE 8B ROCK = DIABASE; Texture: SUBOPHITIC-INTERSERTAL,APHYRIC* Groundmass - PLAGIOCLASE ( 50%) Size(mm): 0.2-1.2 APPROX COMP AN55-60,NORMAL ZONATION; GLASS ( 25%) DEVITRIFIED,CONTAINS SKELETAL CRYSTALLITES; CLINOPYROXENE ( 10%) Size(mm): 0.1-0.7 SUBCALCIC AUGITE,2VZ OF 40 OR LESS; TITANOMAGNETITE ( 5%) Size(mm): 0.01-0.15 COMBINATION ( TR%) INCLUDES QUARTZ + ALK.SPAR,RARE INTERSTITIAL MICROPEGMATIC QUARTZ-ALKALI FELDSPAR INTERGROWTHS* Alteration - CLAY MINERALS ( 15%) Location: VESICLES AND Replacing: GLASS,CPX,PLAG Location: INTERSTITIAL Replacing: MICROLITES Location: MATRIX REPLACES SOME PLAG + CPX MICROLITES WITHIN SUBXTLN AREA* Vesicles - Size(mm): 0.3-1.5 Percent: 5 Location: THROUGHOUT Filling: GREEN CLAY Shape: IRREGULAR Leg : 60 Top/Bottom Interval(mm): 500/ 540 Describer: Sharaskin, A. Hole: 459B Top of Core Depth(m) : 625.00 Rock Type: IGNEOUS Core: 67 Sample Midpoint(m) : 627.02 Sect/Pc #: 2/PCE 5 ROCK = DIABASE; Texture: SUBOPHITIC-INTERSERTAL,APHYRIC* Groundmass - PLAGIOCLASE ( 60%) Size(mm): 0.3-1.3 APPROX COMP AN55-60,INTERSTITIAL PLAG OF COMP AN30 OR LESS,MICROPEGMATIC INTERGROWTHS WITH QUARTZ ARE ABUNDANT; GLASS ( 25%) DEVITRIFIED AND ALTERED,CONTAINS TINY DENDRITIC CRYSTALLITES OF OPAQUE MINS.,ALSO PRESENT WITHIN MICROPEGMATIC AGGREGATES; TITANOMAGNETITE ( 5%) Size(mm): 0.01-0.15 QUARTZ IN MICROPEGMATIC INTERGROWTHS WITH PLAG BUT SEPARATE GRAINS WERE NOT DETERMINED* Alteration - CLAY MINERALS (10-15%) Location: VESICLES AND Replacing: DEVITRIFIED GLASS,CPX Location: INTERSTICES ZEOLITE IDENTITY UNCERTAIN FOR ZEOLITES* Vesicles - Size(mm): 0.03-1.0 Percent: 1-3 Location: SCATTERED Filling: GREEN CLAY Shape: IRREGULAR Leg : 60 Top/Bottom Interval(mm): 240/ 260 Describer: Sharaskin, A. Hole: 459B Top of Core Depth(m) : 634.50 Rock Type: IGNEOUS Core: 68 Sample Midpoint(m) : 634.75 Sect/Pc #: 1/PCE 2 ROCK = APHYRIC BASALT; Texture: INTERSERTAL,APHYRIC* Groundmass - GLASS ( 53%) DEVITRIFIED AND TOTALLY ALTERED; PLAGIOCLASE ( 30%) Size(mm): 0.05-0.5 APPROX COMP AN50(?); CLINOPYROXENE ( 10%) Size(mm): 0.01-0.4 APPROX COMP AUGITE; TITANOMAGNETITE ( 7%) Size(mm): TO 0.1 Alteration - CLAY MINERALS ( 35%) Location: VESICLES, Replacing: GLASS,PLAG + CPX XTLLITES Location: MESOSTASIS ZEOLITE SAME AS CLAY.MINS* Vesicles - Size(mm): 0.1-2.0 Percent: 5 Location: THROUGHOUT Filling: CLAYS,ZEOLITES Shape: IRREGULAR CLAYS AND ZEOLITES LINE VESICLES* Leg : 60 Top/Bottom Interval(mm): 30/ 50 Describer: Fryer, P. Hole: 459B Top of Core Depth(m) : 644.00 Rock Type: IGNEOUS Core: 69 Sample Midpoint(m) : 644.04 Sect/Pc #: 1/PCE 1 ROCK = APHYRIC BASALT ALTERED,TWO DESCRIPTIONS FOR THIS SECTION-THIS ONE WAS NOT USED IN ICD; Texture: INTERSERTAL; Where sampled: FLOW INTERIOR AREA UNCERTAIN* Groundmass - PLAGIOCLASE ( 27%) Morphology: LATHS,SUBHEDRAL,GRANULAR SLIGHT NORMAL ZONING,TWO SIZES-0.02 X 0.25 + 0.05 X 0.4; GLASS ( 20%) MOSTLY DEVITRIFIED,ALTERED TO CLAYS; CLINOPYROXENE ( 16%) Size(mm): 0.05-0.3 Morphology: GRANULAR MAGNETITE ( 2%) Size(mm): 0.01-0.09 Morphology: EUHEDRAL,SKELETAL Alteration - CLAY MINERALS ( 15%) Location: VESICLES, Replacing: GLASS Location: MESOSTASIS GREEN AND BROWN IN COLOR,LINES VESICLES* ZEOLITE ( 5%) Location: VESICLES RADIAL CLUMPS; CARBONATE ( 5%) Location: VEINS Vesicles - Size(mm): 0.05-4.0 Percent: 10 Location: SCATTERED Filling: CLAYS,ZEOLITES Shape: IRREGULAR Leg : 60 Top/Bottom Interval(mm): 30/ 50 Describer: Sharaskin, A. Hole: 459B Top of Core Depth(m) : 644.00 Rock Type: IGNEOUS Core: 69 Sample Midpoint(m) : 644.04 Sect/Pc #: 1/PCE 1 ROCK = APHYRIC BASALT MICROPHYRIC BASALT,TWO DESCRIPTIONS FOR THIS SECTION-THIS ONE USED IN ICD; Texture: INTERSERTAL* Phenocrysts- PLAGIOCLASE ( TR%) Size(mm): TO 0.7 Morphology: EUHEDRAL APPROX COMP AN70(?),MICROPHENOS; CLINOPYROXENE ( TR%) Size(mm): TO 0.8 Morphology: EUHEDRAL APPROX COMP AUGITE,MICROPHENOS* Groundmass - GLASS ( 54%) TOTALLY ALTERED; PLAGIOCLASE ( 22%) Size(mm): 0.03-0.5 APPROX COMP AN50-60(?); CLINOPYROXENE ( 9%) Size(mm): 0.01-0.3 APPROX COMP AUGITE; TITANOMAGNETITE ( 5%) Alteration - CARBONATE ( 1-3%) Location: VESICLES, Replacing: GLASS,PYX Location: MESOSTASIS CLAY MINERALS ( 85%) Location: VESICLES, Replacing: GLASS,PYX Location: MESOSTASIS ZEOLITE (10-12%) Location: VESICLES, Replacing: GLASS,PYX Location: MESOSTASIS Vesicles - Size(mm): 0.3-3.0 Percent: 10 Location: THROUGHOUT Filling: CLAY,ZEOLITE, Shape: IRREGULAR Filling: CARB CLAY, ZEOL + CARB ALSO LINE VESICLES* Leg : 60 Top/Bottom Interval(mm): 330/ 340 Describer: Sharaskin, A. Hole: 459B Top of Core Depth(m) : 644.00 Rock Type: IGNEOUS Core: 69 Sample Midpoint(m) : 645.84 Sect/Pc #: 2/PCE 3B ROCK = APHYRIC BASALT FRACTURED BASALT; Texture: HYALOPILITIC* Groundmass - GLASS ( 60%) BADLY ALTERED; PLAGIOCLASE ( 20%) Size(mm): 0.05-0.5 APPROX COMP AN50-60; CLINOPYROXENE ( 15%) Size(mm): 0.05-0.3 APPROX COMP AUGITE; MAGNETITE ( 5%) Size(mm): TO 0.1 Alteration - CLAY MINERALS ( 40%) Location: VESICLES, Replacing: GLASS,PYROXENES Location: MESOSTASIS Vesicles - Size(mm): 0.2-1.0 Percent: 3-5 Location: THROUGHOUT Filling: GREEN CLAY Shape: IRREGULAR Leg : 60 Top/Bottom Interval(mm): 410/ 420 Describer: Fryer, P. Hole: 459B Top of Core Depth(m) : 653.50 Rock Type: IGNEOUS Core: 70 Sample Midpoint(m) : 653.92 Sect/Pc #: 1/PCE 5 ROCK = APHYRIC BASALT; Texture: INTERSERTAL; Where sampled: FLOW INTERIOR* Phenocrysts- PLAGIOCLASE ( 1%) Size(mm): 0.2-0.4 MINOR RESORPTION,SLIGHT NORMAL ZONING; CLINOPYROXENE ( 1%) Size(mm): 0.25-0.05 Morphology: ANHEDRAL APPROX COMP AUGITE,HAS REACTION RIM OF FINE CPX* Groundmass - PLAGIOCLASE ( 30%) Size(mm): 0.01-0.2 Morphology: LATH-SHAPED,TABULAR,SKELETAL APPROX COMP AN50(?),FINER XTLS NEAR AREAS OF HIGH VESICULARITY,MOST SHOW NORMAL ZONING; CLINOPYROXENE ( 27%) Size(mm): 0.01-0.09 GLASS ( 25%) VERY LITTLE FRESH BROWN GLASS,MOST IS DEVITRIFIED OR TOTALLY REPLACED BY CLAYS; TITANOMAGNETITE ( 3%) Size(mm): 0.01-0.03 Morphology: EUHEDRAL,CUBIC,GRANULAR GRANULAR ONES ARE IN AGGREGATES; ILMENITE ( 1%) Size(mm): 0.01 MINUTE ELONGATE NEEDLES CONCENTRATED NEAR THE VESICLES* Alteration - CLAY MINERALS ( 15%) Location: VEINS, Replacing: GLASS Location: MESOSTASIS, Location: LINE VESICLES GENERALLY GREEN; ZEOLITE ( 5%) Location: MESOSTASIS, Location: LINE VESICLES OCCUR IN MESOSTASIS IN FINE-GRAINED AREAS* Vesicles - Size(mm): 0.05-0.5 Percent: 12 Location: SCATTERED, Filling: CLAYS,ZEOLITES Shape: IRREGULAR, Location: ALIGNED Shape: ELONGATE SOME ALIGNED IN TRAINS,MOST SCATTERED,FILLED PARTLY TO TOTALLY WITH CLAYS AND/OR ZEOLITES* Leg : 60 Top/Bottom Interval(mm): 690/ 710 Describer: Fryer, P. Hole: 459B Top of Core Depth(m) : 653.50 Rock Type: IGNEOUS Core: 70 Sample Midpoint(m) : 654.20 Sect/Pc #: 1/PCE 6 ROCK = APHYRIC BASALT; Texture: HYALOPILITIC; Where sampled: INTERIOR OF HIGHLY SHEARED FLOW* Phenocrysts- PLAGIOCLASE ( 2%) Size(mm): 0.2-0.4 SHOWS SLIGHTLY RESORBED EDGES AND NORMAL ZONING; CLINOPYROXENE ( 1%) Size(mm): 0.05-0.2 Morphology: EUHEDRAL APPROX COMP AUGITE,INTERGROWN WITH PLAG* Groundmass - GLASS ( 50%) ALTERED AND ALMOST WHOLLY DEVITRIFIED; PLAGIOCLASE ( 20%) Morphology: LATHS,GRANULAR SIZES ARE 0.01X0.05-0.02X0.35,APPROX COMP AN50, NORMAL ZONING; CLINOPYROXENE ( 15%) Size(mm): 0.01-0.04 Morphology: GRANULAR APPROX COMP AUGITE,MOST IS ALTERED; TITANOMAGNETITE ( 2%) Size(mm): 0.01-0.03 Morphology: EUHEDRAL,CUBIC,GRANULAR GRANULAR AGGREGATES,SCATTERED THROUGHOUT MATERIAL; ILMENITE ( 1%) IDENTITY UNCERTAIN,NEEDLES IN FINE-GRAINED REGIONS NEAR VESICLES* Alteration - CLAY MINERALS ( 35%) Location: VESICLES, Replacing: GLASS Location: MESOSTASIS GREEN CLAY,LINE VESICLES* Vesicles - Size(mm): 0.05-1.0 Percent: 9 Location: SCATTERED, IN Filling: CLAY.MINS Shape: IRREGULAR Location: TRAINS TINY VESICLES ARE SCATTERED THROUGHOUT ROCK,LARGER ONES ARE IN PARALLEL TRAINS SURROUNDED BY FINER GRAINED MATRIX* Leg : 60 Top/Bottom Interval(mm): 300/ 330 Describer: Sharaskin, A. Hole: 459B Top of Core Depth(m) : 663.00 Rock Type: IGNEOUS Core: 71 Sample Midpoint(m) : 663.32 Sect/Pc #: 1/PCE 4 ROCK = APHYRIC BASALT SPARSELY MICROPHYRIC BASALT; Texture: HYALOPILITIC* Phenocrysts- PLAGIOCLASE ( 0.5%) Size(mm): TO 1.5 Morphology: EUHEDRAL SOMETIMES GLOMEROCRYSTS,APPROX COMP AN70; CLINOPYROXENE ( 0.5%) Size(mm): TO 0.8 Morphology: EUHEDRAL SOMETIMES GLOMEROCRYSTS,APPROX COMP AUGITE* Groundmass - GLASS ( 60%) DEVITRIFIED AND ALTERED; PLAGIOCLASE ( 20%) Size(mm): TO 0.3 Morphology: MICROLITIC CLINOPYROXENE ( 10%) Size(mm): TO 0.1 Morphology: MICROLITIC TITANOMAGNETITE ( 5%) Morphology: SKELETAL,IRREGULAR,GRANULAR Alteration - CLAY MINERALS ( 36%) Location: THROUGHOUT Replacing: GLASSY MATRIX,CPX GRAINS ZEOLITE ( 4%) Location: VESICLES Replacing: GLASSY MATRIX,CPX GRAINS Vesicles - Size(mm): 0.1-0.5 Percent: 5-7 Location: THROUGHOUT Filling: CLAY Shape: IRREGULAR Leg : 60 Top/Bottom Interval(mm): 150/ 160 Describer: Fryer, P. Hole: 459B Top of Core Depth(m) : 663.00 Rock Type: IGNEOUS Core: 71 Sample Midpoint(m) : 664.66 Sect/Pc #: 2/PCE 1 ROCK = APHYRIC BASALT SPARSELY MICROPHYRIC BASALT; Texture: INTERSERTAL; Where sampled: FLOW INTERIOR* Phenocrysts- PLAGIOCLASE ( 1%) Size(mm): 0.3-0.5 SOME ZONING; CLINOPYROXENE ( 1%) Size(mm): TO 0.4 Morphology: ANHEDRAL APPROX COMP AUGITE,ONE XTL WITH PLAG RESORBED AND ROUNDED AND HAS HOUR GLASS EXTINCTION* Groundmass - GLASS ( 10%) DEVITRIFIED,SOME RELATIVELY FRESH BROWN GLASS; PLAGIOCLASE ( 28%) Morphology: LATHS SIZE RANGES ARE 0.04X0.15-0.02X0.15; CLINOPYROXENE ( 20%) Size(mm): 0.01-0.08 Morphology: ANHEDRAL,ELONGATE,LATH-SHAPED Morphology: EQUIGRANULAR TITANOMAGNETITE ( 3%) Size(mm): 0.03-0.13 Morphology: EUHEDRAL,CUBIC,SKELETAL ILMENITE ( 1%) IDENTITY UNCERTAIN,NEEDLE-LIKE OPAQUES COULD BE ILMENITE* Alteration - CLAY MINERALS ( 15%) Location: MESOSTASIS, Replacing: GLASS Location: VEINS,LINE + Location: FILL VESICLES GREEN AND BROWN IN COLOR; ZEOLITE ( 5%) Location: VESICLES, Location: MESOSTASIS RADIAL GROWTHS (MAY BE CLAY-LENGTH FAST); CARBONATE ( 2%) Location: VEINS Vesicles - Size(mm): 0.03-0.8 Percent: 15 Filling: CLAYS,ZEOLITES CLAYS AND/OR ZEOLITE* Leg : 60 Top/Bottom Interval(mm): 60/ 90 Describer: Sharaskin, A. Hole: 459B Top of Core Depth(m) : 682.00 Rock Type: IGNEOUS Core: 73 Sample Midpoint(m) : 682.08 Sect/Pc #: 1/ ROCK = APHYRIC BASALT Texture: HYALOPILITIC* Groundmass - GLASS ( 45%) BADLY ALTERED; PLAGIOCLASE ( 25%) Size(mm): 0.05-0.8 APPROX COMP AN60(?); CLINOPYROXENE ( 15%) Size(mm): 0.01-0.5 TITANOMAGNETITE ( 5%) Size(mm): TO 0.1 Alteration - CLAY MINERALS ( 40%) Location: VESICLES, Replacing: GLASSY MATRIX,PYX Location: INTERSTICES PARTLY REPLACES PYROXENE; ZEOLITE ( 5%) SPHERULES OF ZEOLITE SURROUNDED BY CLAY RINDS* Vesicles - Size(mm): 0.05-0.8 Percent: 10 Location: THROUGHOUT Filling: CLAY Shape: ROUND TO Shape: IRREGULAR PARTLY FILLED BY CLAY* Leg : 60 Top/Bottom Interval(mm): 1410/1440 Describer: Fryer, P. Hole: 459B Top of Core Depth(m) : 682.00 Rock Type: IGNEOUS Core: 73 Sample Midpoint(m) : 683.42 Sect/Pc #: 1/ ROCK = APHYRIC BASALT SPARSELY MICROPHYRIC; Texture: HYALOPILITIC; Where sampled: FLOW INTERIOR* Phenocrysts- PLAGIOCLASE ( 1%) Size(mm): TO 0.5 Morphology: LATHS RESORBED,SLIGHT NORMAL ZONING,MICROPHENOS* Groundmass - GLASS ( 15%) FRESH BROWN,MUCH IS ALTERED TO GREEN CLAYS; PLAGIOCLASE ( 30%) Size(mm): 0.01X0.2 Morphology: LATHS APPROX COMP AN50; CLINOPYROXENE ( 22%) Size(mm): 0.01-0.07 PIGEONITIC(?); TITANOMAGNETITE ( 2%) TINY EUHEDRAL XTLS AND LUMPS OF AGGREGATES,SOME THIN NEEDLES OF AN OPAQUE MINERAL CONCENTRATED IN THE FINER GRAINED AREAS* Alteration - CLAY MINERALS ( 20%) Location: MESOSTASIS, Replacing: GLASS Location: LINE VESICLES GREEN COLOR* Vesicles - Size(mm): 0.02-0.3 Percent: 10 Location: SCATTERED,IN Filling: CLAY.MINS Shape: IRREGULAR Location: TRAINS ENCRUSTED WITH OR FILLED WITH CLAY,GRAIN SIZE OF ROCK IN PROXIMITY TO VESICLES IS MUCH FINER* Leg : 60 Top/Bottom Interval(mm): 1220/1250 Describer: Fryer, P. Hole: 459B Top of Core Depth(m) : 682.00 Rock Type: IGNEOUS Core: 73 Sample Midpoint(m) : 686.24 Sect/Pc #: 3/ ROCK = APHYRIC BASALT SPARSELY MICROPHYRIC; Texture: HYALOPILITIC; Where sampled: FLOW INTERIOR* Phenocrysts- PLAGIOCLASE ( 2%) Size(mm): 0.3-0.5 Morphology: TABULAR-ELONGATE SLIGHT RESORPTION,MINOR OSCILLATORY ZONING,APPROX COMP AN55(?); CLINOPYROXENE ( 1%) Size(mm): 0.2-0.3 Morphology: SUBHEDRAL APPROX COMP AUGITE(?)* Groundmass - PLAGIOCLASE ( 35%) Size(mm): 0.01-0.1 Morphology: LATHS APPROX COMP AN50; GLASS ( 10%) FRESH BROWN,MOST IS ALTERED TO GREEN CLAY; CLINOPYROXENE ( 15%) Size(mm): 0.01-0.08 Morphology: ANHEDRAL PIGEONITIC(?),SOMEWHAT ALTERED; TITANOMAGNETITE ( 2%) Size(mm): 0.01-0.02 Morphology: CUBIC,EUHEDRAL ALSO AN ACICULAR OPAQUE MINERAL SCATTERED THROUGHOUT* Alteration - CLAY MINERALS ( 25%) Location: MESOSTASIS, Location: LINE VESICLES GREEN BOTRYOIDAL VESICLE LINING* Vesicles - Size(mm): 0.5-1.5 Percent: 10 Location: SCATTERED,IN Filling: CLAY-LINED Shape: IRREGULAR Location: TRAINS LINED WITH BOTRYOIDAL GROWTHS OF GREEN CLAY* |
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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