Leg : 54 Top/Bottom Interval(mm): 600/ 630 Describer: Humphris, S.
Hole: 429A Top of Core Depth(m) : 31.00 Rock Type: IGNEOUS
Core: 1 Sample Midpoint(m) : 31.62 Sect/Pc #: 1/PCE 3
ROCK = PLAG SPARSELY MICROPHYRIC BASALT;
Texture: INTERSERTAL*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): TO 0.4 Morphology: SUBHEDRAL,SUBEQUANT
SOME WITH NORMAL ZONING,MICROPHENOCRYST*
Groundmass - OLIVINE ( 1.2%)
PLAGIOCLASE ( 42.4%)
Size(mm): 0.05 Morphology: LATHS,SUBSKELETAL
CLINOPYROXENE ( 35.2%)
Size(mm): <0.05 Morphology: SHEAF-LIKE,BLADES
SOME WITH TWINNING;
FERROUS OXIDE ( 4.6%)
GLASS ( 8.0%)
DEVITRIFIED,ALTERED IN PATCHES,
ABUNDANCES OBTAINED BY POINT COUNT*
Alteration - CLAY MINERALS
Location: VESICLES, Replacing: GLASS,GROUNDMASS
Location: GROUNDMASS
ALTERED TO BROWN AND GREEN CLAY MINERALS;
HEMATITE
SMALL PATCH OF HEMATITE,
POINT COUNT PUTS ALT.+VES. ABUNDANCES AT 10.4*
Vesicles -
Filling: GREEN CLAY.MIN
Leg : 54 Top/Bottom Interval(mm): 50/ 70 Describer: Humphris, S.
Hole: 429A Top of Core Depth(m) : 36.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 36.56 Sect/Pc #: 1/PCE 2
ROCK = PLAG-OL MOD PHYRIC BASALT;
Texture: VARIOLITIC,SPHERULITIC,QUENCHED*
Phenocrysts- OLIVINE ( 1%)
Size(mm): TO 0.2 Morphology: EUHEDRAL
OFTEN ABRADED;
PLAGIOCLASE ( 2%)
Size(mm): TO 0.6 Morphology: SUBHEDRAL,SUBEQUANT,LATHS
Groundmass - OLIVINE ( 3%)
Size(mm): <0.05 Morphology: SUBHEDRAL
PLAGIOCLASE ( 15%)
Size(mm): TO 0.1 Morphology: SUBSKELETAL LATHS
CLINOPYROXENE ( 5%)
Size(mm): 0.01 Morphology: ANHEDRAL
FORM GLOMEROCRYSTS WITH PLAG;
GLASS ( 70%)
Morphology: SPHERULITIC
DEVITRIFIED,SOME ALTERATION TO A GREEN MINERAL*
Alteration - CLAY MINERALS ( 3%)
Location: GROUNDMASS Replacing: OLIVINE
UNCERTAIN IF OLIVINE,GREEN CLAY.MIN, ASSOCIATED
HEMATITE*
Vesicles -
Percent: 2
Location: CLAY.MIN,
Filling: ROUND
Location: OP.MIN
LINED WITH LIGHT-GREEN CLAY MIN. THEN RIM OF
BROWN MIN. FOLLOWED BY INNER RIM OF OP.MIN*
Leg : 54 Top/Bottom Interval(mm): 410/ 440 Describer: Humphris, S.
Hole: 429A Top of Core Depth(m) : 36.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 36.93 Sect/Pc #: 1/PCE 5B
ROCK = OL-PLAG MOD PHYRIC BASALT;
Texture: INTERSERTAL-SUBVARIOLITIC*
Phenocrysts- OLIVINE ( 3%)
Size(mm): TO 0.2 Morphology: EUHEDRAL
PLAGIOCLASE ( 2%)
Size(mm): TO 1 Morphology: SUBHEDRAL,SUBEQUANT
SOME WITH ZONING*
Groundmass - OLIVINE ( 6.4%)
Size(mm): 0.1 Morphology: SUBHEDRAL
PLAGIOCLASE ( 47.8%)
Size(mm): TO 0.2 Morphology: SUBSKELETAL LATHS
CLINOPYROXENE ( 27.2%)
Size(mm): TO 0.1 Morphology: SUBANHEDRAL,SHEAF-LIKE
SUBANHEDRAL XTLS ASSOCIATED WITH PLAG,SHEAF-LIKE
XTLS ARE EXTREMELY FINE;
OPAQUE MINERALS ( 2.8%)
GLASS ( 9.5%)
ABUNDANCES DETERMINED BY POINT COUNT*
Alteration - COMBINATION ( 6.3%)
Location: GROUNDMASS
INCLUDES CARBONATE+CLAY.MIN+HEMATITE,CLAY.MIN IS
GREEN, POINT COUNT ABUNDANCE IS 6.3*
Leg : 54 Top/Bottom Interval(mm): 850/ 900 Describer: Humphris, S.
Hole: 429A Top of Core Depth(m) : 36.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 37.38 Sect/Pc #: 1/PCE 12
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: VARIOLITIC,QUENCHED*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): TO 1.5 Morphology: SUBHEDRAL,SUBEQUANT,LATHS
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): TO 0.01 Morphology: SKELETAL LATHS
CLINOPYROXENE ( 20%)
Size(mm): TO 0.01 Morphology: SUBANHEDRAL-ANHEDRAL
GLASS ( 40%)
SOME DEVITRIFICATION AND ALTERATION*
Alteration - CLAY MINERALS ( 3%)
Location: GROUNDMASS
GREEN+BROWN CLAY.MIN, SPHERICAL PATCHES OF
HEMATITE*
Vesicles -
Percent: RARE
Filling: EMPTY,HEMATITE
POSSIBLY SOME VESICLES FILLING WITH HEMATITE*
Leg : 54 Top/Bottom Interval(mm): 1250/1270 Describer: Humphris, S.
Hole: 429A Top of Core Depth(m) : 36.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 37.76 Sect/Pc #: 1/PCE 17
ROCK = PLAG SPARSELY PHYRIC BASALT
ROCK IS FAIRLY FRESH;
Texture: VARIOLITIC,QUENCHED*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): TO 1.5 Morphology: SUBHEDRAL,SUBEQUANT,LATH-LIKE
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 45.2%)
Size(mm): TO 0.02 Morphology: SKELETAL LATHS
CLINOPYROXENE ( 32.6%)
Size(mm): TO 0.01 Morphology: SUBANHEDRAL-ANHEDRAL
OPAQUE MINERALS ( 6.2%)
GLASS ( 10.2%)
FAIRLY FRESH,SOME DEVITRIFICATION,
ABUNDANCES DETERMINED BY POINT COUNT*
Vesicles -
Percent: 5.8
Filling: EMPTY OR
Shape: ROUND
Filling: CLAY.MINS
OCCASIONALLY FILLING WITH GREEN CLAY.MIN,
POINT COUNT ABUNDANCE IS 5.8*
Leg : 54 Top/Bottom Interval(mm): 90/ 110 Describer: Humphris, S.
Hole: 429A Top of Core Depth(m) : 36.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 38.10 Sect/Pc #: 2/PCE 2
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: VARIOLITIC,QUENCHED*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): TO 1.5 Morphology: SUBHEDRAL,SUBEQUANT,LATH-LIKE
SOME WITH SYMMETRICAL ZONING*
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): TO 1.5 Morphology: SKELETAL LATHS
CLINOPYROXENE ( 20%)
Size(mm): TO 0.01 Morphology: SUBANHEDRAL-ANHEDRAL
GLASS ( 40%)
DEVITRIFIED,SOME ALTERATION*
Alteration - CLAY MINERALS ( 3%)
0.5CM WEATHERING RIM SHOWS CONSIDERABLE OXIDATION
TO BROWN FINE-GRAINED MINERAL*
Leg : 54 Top/Bottom Interval(mm): 1030/1050 Describer: Humphris, S.
Hole: 429A Top of Core Depth(m) : 46.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 47.04 Sect/Pc #: 1/PCE 5
ROCK = PLAG-CPX SPARSELY PHYRIC BASALT;
Texture: INTERGRANULAR,VARIOTIC
VARIOLITIC TEXTURE OCCURS IN PATCHES*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): TO 0.5 Morphology: SUBHEDRAL,SUBEQUANT
CLINOPYROXENE ( 1%)
Size(mm): TO 0.2 Morphology: SUBANHEDRAL-ANHEDRAL
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): 0.05 Morphology: SUBHEDRAL SUBSKELETAL ALTHS
CLINOPYROXENE ( 30%)
Size(mm): TO 0.05 Morphology: SUBANHEDRAL-ANHEDRAL
ANHEDRAL XTLS FORMING GLOMEROCRYSTS WITH PLAG;
COMBINATION ( 30%)
INCLUDES MAGN+ILMENITE+GLASS,PATCHES ALTERED TO
BROWN-GREEN CLAY MINERAL*
Alteration - CLAY MINERALS
Location: VESICLES
BROWN-GREEN CLAY.MIN*
Vesicles -
Size(mm): TO 0.5
Percent: 2
Filling: CLAY.MIN
Shape: ROUND
BROWN-GREEN*
Leg : 54 Top/Bottom Interval(mm): 1230/1250 Describer: Humphris, S.
Hole: 429A Top of Core Depth(m) : 46.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 47.24 Sect/Pc #: 1/PCE 7B
ROCK = PLAG-CPX SPARSELY PHYRIC BASALT
SIMILAR TO PCE 5;
Texture: INTERGRANULAR,VARIOLITIC
VARIOLITIC IN PATCHES*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): TO 0.5 Morphology: SUBHEDRAL,SUBEQUANT
SOME SYMMETRICAL ZONING;
CLINOPYROXENE ( 1%)
Size(mm): TO 0.2 Morphology: SUBANHEDRAL-ANHEDRAL
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 42.8%)
Size(mm): TO 0.05 Morphology: SUBHEDRAL,SUBSKELETAL-LATHS
CLINOPYROXENE ( 36.4%)
Size(mm): TO 0.05 Morphology: SUBANHEDRAL-ANHEDRAL
SOME GLOMEROCRYSTS WITH PLAG;
OPAQUE MINERALS ( 7.2%)
INCLUDES MAGN+ILMENITE;
DEVITRIFIED,OPAQUES+GLASS ARE LESS ALTERED THAN
GLASS ( 6.0%)
PCE 5,ABUNDANCES OBTAINED BY POINT COUNT*
Alteration - CLAY MINERALS
Location: VESICLES
GREEN CLAY.MIN, POINT COUNT ABUNDANCE FOR
ALT.+VES. IS 5.8*
Vesicles -
Size(mm): TO 0.5
Filling: EMPTY OR
Shape: ROUND
Filling: CLAY.MINS
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