Leg : 63 Top/Bottom Interval(mm): 1330/1350 Describer: Shibata, T.
Hole: 470A Top of Core Depth(m) : 166.50 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 169.34 Sect/Pc #: 2/PCE 4G
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,INTERGRANULAR-SUBOPHITIC
GROUNDMASS;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 4%)
Size(mm): 0.5-1.0 Morphology: EUHEDRAL
PARTLY OR COMPLETELY ALTERED;
PLAGIOCLASE ( 4%)
Size(mm): 0.5-2.0 Morphology: EUHEDRAL-SUBHEDRAL
SPINEL ( TR%)
Size(mm): 0.1 Morphology: EUHEDRAL
Groundmass - OLIVINE ( 2%)
Size(mm): 0.05-0.2 Morphology: PRISMATIC-ANHEDRAL,EQUANT
PLAGIOCLASE ( 40%)
Size(mm): 0.05-0.3 Morphology: ACICULAR PRISMS
CLINOPYROXENE ( 42%)
Size(mm): 0.1-0.5 Morphology: ANHEDRAL
OPAQUE MINERALS ( 6%)
Morphology: NEEDLES
Alteration - CARBONATE
Replacing: OL
CLAY MINERALS
Location: VESICLES, Replacing: OL
Location: CRACKS
BROWN*
Vesicles -
Size(mm): 0.2-0.3
Percent: 2
Filling: CLAY.MIN
Shape: CIRCULAR
FILLING IS BROWN CLAY*
Leg : 63 Top/Bottom Interval(mm): 1330/1340 Describer: Shibata, T.
Hole: 470A Top of Core Depth(m) : 166.50 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 170.84 Sect/Pc #: 3/PCE 6
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,SUBVARIOLITIC GROUNDMASS;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( TR%)
Size(mm): 0.5 Morphology: EUHEDRAL
PSEUDOMORPHS--COMPLETELY ALTERED;
PLAGIOCLASE ( 2%)
Size(mm): 0.5 Morphology: EUHEDRAL
Groundmass - OLIVINE ( 4%)
Size(mm): 0.01-0.05 Morphology: EQUANT-EUHEDRAL
PLAGIOCLASE ( 40%)
Size(mm): 0.05-0.1 Morphology: SKELETAL,HOLLOW,ACICULAR
CLINOPYROXENE ( 40%)
Size(mm): 0.01-0.1 Morphology: FEATHERY,DENDRITIC
OPAQUE MINERALS ( 5%)
MICROCRYST GROUNDMASS ( 9%)
Alteration - CARBONATE
Location: VESICLES Replacing: OL
CALCITE IN VESICLES;
CLAY MINERALS
Location: VESICLES, Replacing: OL
Location: CRACKS
Vesicles -
Size(mm): 0.2
Percent: TR
Filling: CALCITE,
Shape: CIRCULAR
Filling: CLAY.MIN
Leg : 63 Top/Bottom Interval(mm): 690/ 710 Describer: Shibata, T.
Hole: 470A Top of Core Depth(m) : 171.00 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 171.70 Sect/Pc #: 1/PCE 3C
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC,GLOMEROPORPHYRITIC,
INTERGRANULAR GROUNDMASS;
Where sampled: PILLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): 0.3-1.0 Morphology: EUHEDRAL
PHENOS AND MICROPHENOS*
Groundmass - OLIVINE ( 3%)
Size(mm): 0.05-0.08 Morphology: ANHEDRAL,EQUANT
PLAGIOCLASE ( 42%)
Size(mm): 0.03-0.2 Morphology: SKELETAL,HOLLOW
CLINOPYROXENE ( 42%)
Size(mm): 0.05-0.2 Morphology: FEATHERY,DENDRITIC
OPAQUE MINERAL ( 10%)
Size(mm): 0.01-0.05 Morphology: SKELETAL-EQUANT
Alteration - CARBONATE
Location: VEIN
CLAY MINERALS
Location: VESICLES,OL
Vesicles -
Size(mm): 0.2
Percent: 1
Filling: CLAY.MIN
Shape: CIRCULAR
FILLING IS BROWNISH GREEN CLAY*
Leg : 63 Top/Bottom Interval(mm): 950/ 980 Describer: Shibata, T.
Hole: 470A Top of Core Depth(m) : 171.00 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 174.97 Sect/Pc #: 3/PCE 3C
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,INTERSERTAL,INTERGRANULAR
GROUNDMASS;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 1 Morphology: EUHEDRAL
COMPLETELY ALTERED--PSEUDOMORPHS*
PLAGIOCLASE ( 2%)
Size(mm): 0.5-1 Morphology: EUHEDRAL
Groundmass - OLIVINE ( 2%)
Size(mm): 0.05-0.2 Morphology: EUHEDRAL-EQUANT
PLAGIOCLASE ( 38%)
Size(mm): 0.05-0.3 Morphology: SKELETAL
CLINOPYROXENE ( 40%)
Size(mm): 0.03-0.3 Morphology: SKELETAL-FEATHERY
OPAQUE MINERALS ( 5%)
MICROCRYST GROUNDMASS ( 9%)
Alteration - CARBONATE
Location: VEINS
CLAY MINERALS
Location: VESICLES Replacing: OL
ALSO FOUND IN THE INTERSTICES BETWEEN PLAG LATHS*
Vesicles -
Size(mm): 0.2-0.4
Percent: 3
Filling: CLAY.MIN
Shape: CIRCULAR
FILLING IS GREEN CLAY*
Leg : 63 Top/Bottom Interval(mm): 650/ 680 Describer: Shibata, T.
Hole: 470A Top of Core Depth(m) : 180.50 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 182.67 Sect/Pc #: 2/PCE 3E
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,INTERGRANULAR-INTERSERTAL
GROUNDMASS;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.5 Morphology: EUHEDRAL
PARTLY ALTERED;
PLAGIOCLASE ( 2%)
Size(mm): 0.5-1 Morphology: EUHEDRAL
Groundmass - OLIVINE ( 3%)
Size(mm): 0.05-0.1 Morphology: EUHEDRAL,
Morphology: EQUANT-SLENDER PRISMATIC
PLAGIOCLASE ( 34%)
Size(mm): 0.05-0.3 Morphology: SKELETAL
CLINOPYROXENE ( 35%)
Size(mm): 0.03-0.2 Morphology: SKELETAL,FEATHERY,DENDRITIC
OPAQUE MINERALS ( 7%)
MICROCRYST GROUNDMASS ( 15%)
Alteration - CLAY MINERALS
Location: VESICLES,
Location: CRACKS
ALSO FOUND IN THE INTERSTICES BETWEEN PLAG LATHS
AND PYROXENES*
Vesicles -
Size(mm): 0.2-0.4
Percent: 3
Filling: CLAY.MIN
Shape: CIRCULAR
FILLING IS BROWN CLAY*
Leg : 63 Top/Bottom Interval(mm): 340/ 360 Describer: Shibata, T.
Hole: 470A Top of Core Depth(m) : 180.50 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 185.35 Sect/Pc #: 4/PCE 1B
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,GLOMEROPORPHYRITIC,
INTERGRANULAR-SUBOPHITIC GROUNDMASS*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.5-1 Morphology: EUHEDRAL
PARTLY ALTERED;
PLAGIOCLASE ( 3%)
Size(mm): 0.5-2 Morphology: EUHEDRAL
Groundmass - OLIVINE ( 5%)
Size(mm): 0.03-0.2 Morphology: PRISMATIC-ANHEDRAL EQUANT
PLAGIOCLASE ( 41%)
Size(mm): 0.1-0.5 Morphology: SLENDER LATHS
CLINOPYROXENE ( 40%)
Size(mm): 0.05-1 Morphology: ANHEDRAL
OPAQUE MINERALS ( 8%)
Size(mm): 0.05-0.1
Alteration - CLAY MINERALS
Location: VESICLES Replacing: OL
ALSO FOUND IN THE INTERSTICES BETWEEN PLAG LATHS
AND CLINOPYROXENES*
Vesicles -
Size(mm): 0.2-0.4
Percent: 2
Filling: CLAY.MIN
Shape: CIRCULAR
FILLING IS BROWN CLAY*
Leg : 63 Top/Bottom Interval(mm): 750/ 800 Describer: Shibata, T.
Hole: 470A Top of Core Depth(m) : 189.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 190.28 Sect/Pc #: 1/PCE 8B
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,GLOMEROPORPHYRITIC,
INTERGRANULAR-SUBOPHITIC GROUNDMASS*
Phenocrysts- OLIVINE ( TR%)
Size(mm): 0.5-1 Morphology: EUHEDRAL
PARTLY ALTERED;
PLAGIOCLASE ( 3%)
Size(mm): 0.5-1.5 Morphology: EUHEDRAL
Groundmass - OLIVINE ( 4%)
Size(mm): 0.03-0.2 Morphology: PRISMATIC-ANHEDRAL,EQUANT
PLAGIOCLASE ( 41%)
Size(mm): 0.1-0.5 Morphology: SLENDER LATHS
CLINOPYROXENE ( 43%)
Size(mm): 0.05-1 Morphology: ANHEDRAL
OPAQUE MINERALS ( 6%)
Size(mm): 0.05-0.1
Alteration - CLAY MINERALS
Location: VESICLES Replacing: OL
ALSO FOUND IN THE INTERSTICES BETWEEN PLAG LATHS
AND CLINOPYROXENES*
Vesicles -
Size(mm): 0.2-0.4
Percent: 3
Filling: CLAY.MIN
Shape: CIRCULAR
FILLING IS BROWN CLAY*
Leg : 63 Top/Bottom Interval(mm): 340/ 370 Describer: Shibata, T.
Hole: 470A Top of Core Depth(m) : 194.50 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 194.86 Sect/Pc #: 1/PCE 4B
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,INTERSERTAL GROUNDMASS*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): 0.5-1 Morphology: EUHEDRAL
Groundmass - PLAGIOCLASE ( 36%)
Size(mm): 0.03-0.1 Morphology: SKELETAL NEEDLES
CLINOPYROXENE ( 35%)
Size(mm): 0.03-0.1 Morphology: FEATHERY,ANHEDRAL
OPAQUE MINERALS ( 15%)
Size(mm): 0.005-0.01
MICROCRYST GROUNDMASS ( 7%)
DEVITRIFIED GLASS*
Vesicles -
Size(mm): 0.1
Percent: 5
Filling: VOID
Shape: CIRCULAR
Leg : 63 Top/Bottom Interval(mm): 350/ 360 Describer: Shibata, T.
Hole: 470A Top of Core Depth(m) : 198.50 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 198.86 Sect/Pc #: 1/PCE 3D
ROCK = APHYRIC BASALT
ALTERED;
Texture: APHYRIC,HYPOCRYSTALLINE,SUBVARIOLITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Groundmass - PLAGIOCLASE ( 15%)
Size(mm): 0.01-0.1 Morphology: SKELETAL,NEEDLES
CLINOPYROXENE ( 10%)
Size(mm): 0.01-0.1 Morphology: SKELETAL,FEATHERY
OPAQUE MINERALS ( 5%)
GLASS ( 70%)
DEVITRIFIED OR ALTERED GLASS*
Alteration - CARBONATE
Location: VESICLES
CLAY MINERALS
Location: MATRIX
ZEOLITE
Location: VESICLES
Vesicles -
Size(mm): 0.3-0.5
Percent: 5
Filling: ZEOLITE
Shape: IRREGULAR-
Shape: CIRCULAR
ONLY SOME FILLED BY ZEOLITE*
Leg : 63 Top/Bottom Interval(mm): 300/ 320 Describer: Shibata, T.
Hole: 470A Top of Core Depth(m) : 207.50 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 207.81 Sect/Pc #: 1/PCE 4
ROCK = APHYRIC BASALT;
Texture: APHYRIC,SUBOPHITIC,INTERSERTAL*
Groundmass - OLIVINE ( 3%)
Size(mm): 0.05-0.1 Morphology: ANHEDRAL,EQUANT
PARTLY ALTERED;
PLAGIOCLASE ( 41%)
Size(mm): 0.1-1 Morphology: PRISMATIC,LATHS
CLINOPYROXENE ( 40%)
Size(mm): 0.1-2 Morphology: ANHEDRAL
2VZ 35-45;
OPAQUE MINERALS ( 8%)
Size(mm): 0.01-0.1 Morphology: ACICULAR
MICROCRYST GROUNDMASS ( 8%)
Alteration - CLAY MINERALS
Replacing: OL
ALSO FOUND IN THE INTERSTICES BETWEEN PLAG LATHS
AND CLINOPYROXENES*
Leg : 63 Top/Bottom Interval(mm): 670/ 690 Describer: Shibata, T.
Hole: 470A Top of Core Depth(m) : 207.50 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 208.18 Sect/Pc #: 1/PCE 8
ROCK = APHYRIC BASALT;
Texture: APHYRIC,INTERGRANULAR-INTERSERTAL MATRIX*
Phenocrysts- PLAGIOCLASE ( 3%)
Size(mm): 0.2-0.4 Morphology: EUHEDRAL
MICROPHENOS*
Groundmass - PLAGIOCLASE ( 37%)
Size(mm): 0.01-0.1 Morphology: PRISMATIC,SLENDER LATHS
CLINOPYROXENE ( 40%)
Size(mm): 0.01-0.1 Morphology: ANHEDRAL,EQUANT
OPAQUE MINERALS ( 10%)
Size(mm): 0.01-0.03
MICROCRYST GROUNDMASS ( 7%)
Alteration - CLAY MINERALS
Location: VESICLES,
Location: MATRIX
Vesicles -
Size(mm): 0.2-0.3
Percent: 3
Filling: CLAY.MIN
Shape: CIRCULAR
FILLING IS BROWNISH GREEN CLAY*
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