Leg : 54 Top/Bottom Interval(mm): 1120/ 0 Describer: Humphris, S.
Hole: 424 Top of Core Depth(m) : 28.50 Rock Type: IGNEOUS
Core: 4 Sample Midpoint(m) : 37.12 Sect/Pc #: 6/PCE 3
ROCK = PLAG-CPX SPARSELY PHYRIC BASALT
FAIRLY FRESH;
Texture: INTERSERTAL*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): 0.1 Morphology: SUBHEDRAL
ZONED;
CLINOPYROXENE ( <0.1%)
ONE ANHEDRAL PIECE WITH PLAG INCLUSIONS*
Groundmass - OLIVINE
IDENTITY UNCERTAIN FOR OL;
PLAGIOCLASE ( 40.7%)
Size(mm): <0.05 Morphology: PARTIALLY SKELETAL LATHS
CLINOPYROXENE ( 25.5%)
Size(mm): <0.05 Morphology: SUBHEDRAL-ANHEDRAL
MAGNETITE ( 11.9%)
Size(mm): <0.05
GLASS ( 22.2%)
FAIRLY FRESH*
Alteration - CLAY MINERALS ( 0.5%)
Replacing: GROUNDMASS
Vesicles -
Percent: 0.2
Filling: EMPTY
Shape: SPHERICAL
Leg : 54 Top/Bottom Interval(mm): 90/ 140 Describer: Humphris, S.
Hole: 424 Top of Core Depth(m) : 38.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 38.12 Sect/Pc #: 1/PCE 2
ROCK = PLAG-PYX SPARSELY PHYRIC BASALT;
Texture: VARIOLITIC
FEW SPHERULITIC AREAS*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): 0.75 Morphology: EUHEDRAL,SUBHQUANT
Groundmass - PLAGIOCLASE (25-30%)
Size(mm): TO 0.02 Morphology: SKELETAL
HAS FEATHERY TERMINATIONS WITH A FEW INTENSELY
ZONED SUBEQUANT,MICROPHENOCRYSTS;
CLINOPYROXENE ( RARE%)
COMBINATION ( 75%)
GLASS+ILMENITE,DEVITRIFIED,BROWN*
Alteration - CLAY MINERALS
Location: VESICLES Replacing: MICROPHENOS
INFILLING VESICLES AND ALTERATION OF
MICROPHENOCRYST PHASE (OL OR CPX?)*
Leg : 54 Top/Bottom Interval(mm): 590/ 670 Describer: Humphris, S.
Hole: 424 Top of Core Depth(m) : 38.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 38.63 Sect/Pc #: 1/PCE 8
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: INTERSERTAL,VARIOLITIC*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): TO 1.5 Morphology: EUHEDRAL-SUBHEDRAL
WITH SKELETAL OVERGROWTHS,
COMPLEX OSCILLATORY ZONING*
Groundmass - OLIVINE
ID UNCERTAIN;
PLAGIOCLASE ( 40%)
Size(mm): <0.1 Morphology: SKELETAL
WITH FEATHERY TERMINATIONS;
CLINOPYROXENE ( 30%)
Size(mm): <0.01 Morphology: GRANULAR
FEATHERY,MADE ESTIMATING PCT DIFFICULT;
COMBINATION ( 30%)
GLASS+ILMENITE+MAGN,DEVITRIFIED*
Alteration - CLAY MINERALS ( 2%)
Replacing: GLASS
BROWN MINERAL REPLACING GLASS, VESICLES LINED
WITH SAME MINERAL*
Vesicles -
Filling: BROWN MINERAL
Leg : 54 Top/Bottom Interval(mm): 980/1100 Describer: Mattey, D.
Hole: 424 Top of Core Depth(m) : 38.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 39.04 Sect/Pc #: 1/PCE 5
ROCK = APHYRIC BASALT;
Texture: INTERSERTAL*
Phenocrysts- PLAGIOCLASE ( TR%)
Size(mm): TO 1 Morphology: SUBEQUANT
ZONED*
Groundmass - OLIVINE ( 0.3%)
PLAGIOCLASE ( 30.3%)
Morphology: SKELETAL
CLINOPYROXENE ( 42.4%)
Morphology: SUBHEDRAL-ANHEDRAL
TITANOMAGNETITE ( 9.0%)
GLASS ( 14.5%)
REPLACED IN PART WITH BROWNISH-GREEN;
CHLORITE ( 3.6%)
ALSO INCLUDES OTHER ALTERATION MINERALS,INFILLING*
Alteration - CLAY MINERALS
Replacing: GLASS
FERROUS OXIDE
Replacing: GLASS
Vesicles -
Percent: 0.8
Filling: FE.OX,CLAY.MINS
Leg : 54 Top/Bottom Interval(mm): 1260/1290 Describer: Humphris, S.
Hole: 424 Top of Core Depth(m) : 38.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 39.28 Sect/Pc #: 1/PCE 13
ROCK = PLAG SPARSELY PHYRIC BASALT
FAIRLY FRESH;
Texture: INTERGRANULAR
WITH GLASSY SEGREGATIONS*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): TO 2 Morphology: SUBEQUANT
COMPLEX ZONING*
Groundmass - OLIVINE
ID UNCERTAIN;
PLAGIOCLASE ( 40%)
Morphology: PARTIALLY SKELETAL LATHS
CLINOPYROXENE ( 30%)
Morphology: SUBHEDRAL-ANHEDRAL
MAGNETITE ( 10%)
Size(mm): <1 Morphology: SKELETAL,EUHEDRAL
GLASS ( 20%)
SOME DEVITRIFICATION,GLASSY SEGREGATIONS*
Leg : 54 Top/Bottom Interval(mm): 900/ 930 Describer: Humphris, S.
Hole: 424 Top of Core Depth(m) : 38.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 40.42 Sect/Pc #: 2/PCE 2B
ROCK = PLAG-OL SPARSELY PHYRIC BASALT
FRESH;
Texture: INTERGRANULAR-SUBOPHITIC,COARSE-GRAINED,SPARSELY
Piece #: IC BASALT
RARE INTERSERTAL TO SUBVARIOLITIC AREAS*
Phenocrysts- OLIVINE ( TR%)
Size(mm): 0.75 Morphology: EUHEDRAL
1 LARGE FRESH PHENOCRYST;
PLAGIOCLASE ( 1%)
Size(mm): <0.5 Morphology: SUBHEDRAL,SUBEQUANT
ZONED*
Groundmass - PLAGIOCLASE ( 40.6%)
Morphology: SUBOPHITIC
CLINOPYROXENE ( 38%)
SHOWS TWINNING;
MAGNETITE ( 6.4%)
Morphology: SKELETAL
LARGE+NUMEROUS;
GLASS
VARIOLITIC AREAS CONTAIN SKELETAL PLAG*
Vesicles -
Percent: 2.8
Leg : 54 Top/Bottom Interval(mm): 220/ 250 Describer: Humphris, S.
Hole: 424 Top of Core Depth(m) : 38.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 41.24 Sect/Pc #: 3/PCE 2
ROCK = PLAG-CPX SPARSELY PHYRIC BASALT;
Texture: INTERGRANULAR
WITH LOCALLY SMALL GLOMEROPHYRIC GROWTHS OF
PLAG AND CPX*
Phenocrysts- PLAGIOCLASE ( <2%)
Size(mm): <1 Morphology: ANHEDRAL-SUBHEDRAL
ZONED,UNDULATORY EXTINCTION*
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): TO 0.05 Morphology: SKELETAL
IN GLASSY AREAS;
CLINOPYROXENE
Morphology: GRANULAR -SUBOPHITIC
MAGNETITE ( 6%)
MAINLY IN GLASSY AREAS;
GLASS ( 15%)
SOME PATCHES OF ALTERATION*
Alteration - CLAY MINERALS ( <1%)
BROWN MINERAL IN VESICLE FILLING*
Vesicles -
Filling: CLAY.MINS
Leg : 54 Top/Bottom Interval(mm): 100/ 130 Describer: Humphris, S.
Hole: 424 Top of Core Depth(m) : 38.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 42.62 Sect/Pc #: 4/PCE 1
ROCK = PLAG-CPX SPARSELY PHYRIC BASALT
ROCK IS RATHER FRESH;
Texture: INTERGRANULAR
WITH GLOMEROCRYSTS OF PLAG AND CPX*
Phenocrysts- PLAGIOCLASE ( <2%)
Size(mm): 1 Morphology: ANHEDRAL-SUBHEDRAL
Groundmass - PLAGIOCLASE ( 45%)
CLINOPYROXENE ( 30%)
MAGNETITE ( 7%)
GLASS ( 15%)
THIS SAMPLE IS IDENTICAL TO SAMPLE CORES SEC3 PCE2
BUT WITH SLIGHTLY MORE ALTERATION IN THE
GROUNDMASS*
Leg : 54 Top/Bottom Interval(mm): 310/ 380 Describer: Mattey, D.
Hole: 424 Top of Core Depth(m) : 47.50 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 47.85 Sect/Pc #: 1/PCE 5
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: INTERSERTAL-INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 0.02 Morphology: ANHEDRAL-SUBHEDRAL
ZONED,UNDULATORY EXTINCTION;
Groundmass - PLAGIOCLASE ( 40.7%)
Size(mm): <0.1
SKELETAL IN GLASSY AREAS;
CLINOPYROXENE ( 31.6%)
Morphology: GRANULAR-SUBOPHITIC
TITANOMAGNETITE
Morphology: SUBSKELETAL-EUHEDRAL
GLASS ( 17.7%)
DEVITRIFIED*
Alteration - CHLORITE
Replacing: GLASS
Vesicles -
Percent: RARE
Filling: FE.OX
Shape: SPHERICAL
Filling: CLAY.MINS
BROWN*
Leg : 54 Top/Bottom Interval(mm): 520/ 550 Describer: Mattey, D.
Hole: 424 Top of Core Depth(m) : 47.50 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 48.04 Sect/Pc #: 1/PCE 7
ROCK = PLAG-OL MOD PHYRIC BASALT;
Texture: INTERSERTAL-SUBVARIOLITIC*
Phenocrysts- OLIVINE ( TR%)
Size(mm): 0.02 Morphology: SUBHEDRAL
PLAGIOCLASE ( 2-3%)
Size(mm): 0.2-0.5 Morphology: EUHEDRAL
SPIKEY OVERGROWTHS,APPROX COMP AN70*
Groundmass - OLIVINE ( 10%)
Morphology: SUBHEDRAL
PLAGIOCLASE ( 30%)
Size(mm): <0.2 Morphology: EUHEDRAL
FEATHERY TERMINATIONS;
CLINOPYROXENE ( 10%)
Size(mm): <0.1 Morphology: GRANULAR
MAGNETITE ( 5%)
GLASS ( 45%)
DEVITRIFIED*
Vesicles -
Size(mm): 0.05-0.3
Percent: 2-3
Filling: CALCITE
Shape: SPHERICAL
Leg : 54 Top/Bottom Interval(mm): 1070/1100 Describer: Humphris, S.
Hole: 424 Top of Core Depth(m) : 47.50 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 48.59 Sect/Pc #: 1/PCE 10C
ROCK = PLAG-CPX MOD PHYRIC BASALT;
Texture: INTERSERTAL
WITH INTERGRANULAR AREAS*
Phenocrysts- PLAGIOCLASE ( 3%)
Size(mm): TO 0.5 Morphology: SUBEQUANT
OSCILLATORY ZONING,GLOMEROCRYSTS;
CLINOPYROXENE ( 2%)
Size(mm): TO 0.5 Morphology: SUBHEDRAL
LATH-LIKE SHOWING TWINNING,GLOMEROCRYSTS*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): <0.1 Morphology: SKELETAL
WITH FEATHERY TEXTURES;
CLINOPYROXENE ( 35%)
Size(mm): <0.05 Morphology: SUBHEDRAL
MAGNETITE ( 10%)
GLASS
SOME ALTERED TO BRWON FINE-GRAINED MINERAL,
GLOMEROCRYSTS ARE SEPARATED BY GLASSY GROUNDMASS*
Leg : 54 Top/Bottom Interval(mm): 1380/1400 Describer: Humphris, S.
Hole: 424 Top of Core Depth(m) : 47.50 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 48.89 Sect/Pc #: 1/PCE 12B
ROCK = PLAG-CPX SPARSELY PHYRIC BASALT
ROCK IS FAIRLY FRESH;
Texture: OPHITIC-INTERSERTAL;
OPHITIC IS INTERGRANULAR IN HOLOCRYSTALLINE AREAS,
INTERSERTAL TO SUBVARIOLITIC IN GLASSY
SEGREGATIONS*
Phenocrysts- PLAGIOCLASE ( 0.4%)
Size(mm): TO 2 Morphology: SUBHEDRAL
EVENLY ZONED;
CLINOPYROXENE ( 0.3%)
Size(mm): TO 1 Morphology: EUHEDRAL
SIMPLY TWINNED(010)*
Groundmass - OLIVINE ( TR%)
PLAGIOCLASE ( 39%)
CLINOPYROXENE ( 34%)
MAGNETITE ( 7%)
Morphology: SKELETAL, EUHEDRAL
GLASS ( 20%)
FRESH,CONTAINING MEEDLE-LIKE OPAQUES*
Alteration - CLAY MINERALS ( 0.1%)
Location: VESICLES
Leg : 54 Top/Bottom Interval(mm): 320/ 350 Describer: Humphris, S.
Hole: 424 Top of Core Depth(m) : 47.50 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 49.34 Sect/Pc #: 2/PCE 2A
ROCK = PLAG-CPX SPARSELY PHYRIC BASALT
ROCK IS RATHER FRESH;
Texture: INTERGRANULAR,COARSE GRAINED
VARIOLITIC GLASSY PATCHES*
Phenocrysts- PLAGIOCLASE ( <1%)
Morphology: EUHEDRAL-SUBHEDRAL
COMPLEX OSCILLATORY ZONING;
CLINOPYROXENE ( <1%)
Morphology: SUBHEDRAL
Groundmass - PLAGIOCLASE ( 40%)
SUBEQUANT,MORE OFTEN LATHS;
CLINOPYROXENE ( 35%)
Morphology: SUBHEDRAL
BUT WITH SOME LATHS THAT SHOW TWINNING;
MAGNETITE ( 7%)
Morphology: SUBHEDRAL-EUHEDRAL
GLASS
SEGREGATIONS SHOW DEVITRIFICATION*
Leg : 54 Top/Bottom Interval(mm): 1070/1090 Describer: Humphris, S.
Hole: 424 Top of Core Depth(m) : 47.50 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 50.08 Sect/Pc #: 2/PCE 6C
ROCK = PLAG-CPX SPARSELY PHYRIC BASALT
ROCK IS RATHER FRESH;
Texture: INTERGRANULAR-SUBOPHITIC
HOLOCRYSTALLINE AREAS ARE INTERGRANULAR AND
SUBOPHITIC,A FEW GLASSY AREAS ARE INTERSERTAL*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): <1 Morphology: SUBHEDRAL
SPIKY OVERGROWTHS,EVENLY ZONED;
CLINOPYROXENE ( <1%)
Size(mm): <1 Morphology: EUHEDRAL
SLIGHTLY ZONED*
Groundmass - PLAGIOCLASE (44.8 %)
Size(mm): 0.01L Morphology: ATHS
SOME ZONING;
CLINOPYROXENE ( 35.5%)
Size(mm): 0.01
OCCASIONAL TWINS,COMPLEX EXTINCTION;
MAGNETITE ( 8.5%)
Morphology: SUBEUHEDRAL
SUB-EUHEDRAL OPAQUES;
GLASS ( 10%)
Vesicles -
Percent: 0.8
Leg : 54 Top/Bottom Interval(mm): 210/ 240 Describer: Humphris, S.
Hole: 424 Top of Core Depth(m) : 47.50 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 50.73 Sect/Pc #: 3/PCE 10
ROCK = PLAG-CPX-OL MOD PHYRIC BASALT
ROCK IS RATHER FRESH;
Texture: INTERGRANULAR
ROCK IS FINER GRAINED THAN CORE6 SEC2 PCE2A*
Phenocrysts- OLIVINE ( 0.3%)
Size(mm): 0.5 Morphology: EUHEDRAL
1 LARGE PHENOCRYST;
PLAGIOCLASE ( 2%)
Morphology: SUBEQUANT
SOME WITH OSCILLATORY ZONING;
CLINOPYROXENE ( <1%)
Morphology: SUBHEDRAL
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): <0.1 Morphology: SUBHEDRAL,LATH-LIKE
SOME GLOMEROCRYSTS;
CLINOPYROXENE ( 28%)
Size(mm): <0.1 Morphology: SUBHEDRAL-ANHEDRAL
MAGNETITE ( 10%)
Morphology: EUHEDRAL-SUBHEDRAL
GLASS ( 13%)
FRESH*
Vesicles -
Percent: 0.6
Leg : 54 Top/Bottom Interval(mm): 00/ 100 Describer: Humphris, S.
Hole: 424 Top of Core Depth(m) : 57.00 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 57.05 Sect/Pc #: 1/PCE 1
ROCK = APHYRIC BASALT;
Texture: VARIOLITIC,GLASSY;
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): <0.5
OCCASIONALLY ZONED*
Groundmass - PLAGIOCLASE ( 10%)
Size(mm): <0.01 Morphology: SKELETAL
WITH FEATHERY INCLUSIONS;
CLINOPYROXENE ( 20%)
Morphology: ANHEDRAL
SMALL XTLS,SPHERULITIC CPX;
GLASS ( 70%)
DEVITRIFIED
PCTS DIFFICULT TO GAUGE DUE TO SPHERULITIC CPX*
Alteration - COMBINATION ( 2%)
INCLUDES CARB+CLAY.MINS+ZEOL+OTHER;
CARBONATE
CLAY MINERALS
Replacing: CRYSTAL PHASE
GREEN,FINE GRAINED REPLACING A XTL PHASE(?);
OTHER
AMORPHOUS REDDISH-BROWN MINERAL FILLING
VESICLES*
Leg : 54 Top/Bottom Interval(mm): 130/ 150 Describer: Humphris, S.
Hole: 424 Top of Core Depth(m) : 57.00 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 57.14 Sect/Pc #: 1/PCE 3
ROCK = PLAG SPARSELY PHYRIC BASALT
Texture: HOLOHYALLINE-SPHERULITIC
FLOW BANDING WITH CRYSTALLINE BANDS CONCENTRATING
SPHERULITES AND PHENOCRYSTS*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): <0.1 Morphology: EUHEDRAL
ZONED,SCATTERED*
Groundmass - COMBINATION ( 95%)
INCLUDES MAGN+ILMENITE+GLASS,DARK BROWN ALMOST
OPAQUE GLASS,FEW SPHERULITES AND TINY VARIOLITES*
Alteration - CLAY MINERALS
Location: VESICLES
BROWN*
Vesicles -
Size(mm): <0.1
Percent: 3
Filling: CLAY.MIN
Shape: SPHERICAL
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