Leg : 63 Top/Bottom Interval(mm): 130/ 150 Describer: Pisciotto, K.
Hole: 472 Top of Core Depth(m) : 112.00 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 112.14 Sect/Pc #: 1/PCE 1C
ROCK = PLAG MODERATELY PHYRIC BASALT
PLUS ASSOCIATED HYALOCLASTITE;
Texture: MODERATELY PORPHYRITIC,GLOMEROPORPHYRITIC,
DEVITRIFIED GLASS;
Where sampled: GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): 0.5-1 Morphology: EUHEDRAL
CLUSTERS OF LATHS IN DEVITRIFIED SPHERULITIC
GLASS*
Groundmass - OLIVINE
POSSIBLY PRESENT AS UNRESOLVABLE MICROCRYSTALLINE
GRANULAR MESOSTASIS;
PLAGIOCLASE ( 5%)
Size(mm): <0.1 Morphology: EUHEDRAL,LATHS
SMALL LATHS IN GLASS;
OPAQUE MINERALS ( 2%)
GLASS ( 71%)
UNALTERED GLASS (30%) AND SPHERULITIC DEVITRIFIED
GLASS (40%)*
Alteration - CLAY MINERALS ( 10%)
POSSIBLY SILICA,CEMENTS GLASSY FRAGMENTS TOGETHER;
ZEOLITE ( TR%)
Location: CRACKS
Leg : 63 Top/Bottom Interval(mm): 530/ 570 Describer: Pisciotto, K.
Hole: 472 Top of Core Depth(m) : 112.00 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 114.05 Sect/Pc #: 2/PCE 7
ROCK = APHYRIC BASALT;
Texture: APHYRIC,GLOMEROPORPHYRITIC,HYALOPILITIC
GROUNDMASS;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 0.2-0.3 Morphology: LATHS
BUNCHES OF LATH-SHAPED XTLS,MICROPHENOS*
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): 0.05-0.1 Morphology: ACICULAR PRISMS
CLINOPYROXENE ( 30%)
Size(mm): 0.01-0.03 Morphology: DENDRITIC,EQUANT
MICROCRYST GROUNDMASS ( 36%)
SPHERULITIC (PARTIALLY DEVITRIFIED) GLASS,PERHAPS
AS MUCH AS 15% OF THIS IS MICROGRANULAR OL*
Vesicles -
Size(mm): 0.2-0.5
Percent: 2-3
Location: SCATTERED
Filling: EMPTY,CLAY.MIN
Shape: CIRCULAR
EMPTY BUT A FEW ARE FILLED WITH BROWN CLAY*
Leg : 63 Top/Bottom Interval(mm): 400/ 420 Describer: Pisciotto, K.
Hole: 472 Top of Core Depth(m) : 119.50 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 119.91 Sect/Pc #: 1/PCE 4D
ROCK = APHYRIC BASALT;
Texture: APHYRIC,INTERGRANULAR GROUNDMASS;
Where sampled: FLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): 0.1-0.2 Morphology: PRISMATIC-LATHS
CLINOPYROXENE ( 30%)
Size(mm): 0.05-0.1 Morphology: ANHEDRAL-GRANULAR
MAGNETITE ( 10%)
Size(mm): <0.05
IDENTITY UNCERTAIN,SMALL CUBE-SHAPED GRAINS AND
CUBIC MASSES;
MESOSTASIS ( 2-3%)
SMALL PATCHES BETWEEN PYX AND FELDSPAR*
Alteration - CALCITE
Location: VESICLES
Vesicles -
Size(mm): 0.2
Percent: 2-3
Location: SCATTERED
Filling: EMPTY,CALCITE
Shape: CIRCULAR
EMPTY BUT A FEW ARE FILLED WITH CALCITE*
Leg : 63 Top/Bottom Interval(mm): 1400/1420 Describer: Shibata, T.
Hole: 472 Top of Core Depth(m) : 128.50 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 129.91 Sect/Pc #: 1/PCE 12C
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,GLOMEROPORPHYRITIC,
SUBVARIOLITIC GROUNDMASS*
Phenocrysts- OLIVINE ( 3%)
Size(mm): 0.5-1.0 Morphology: EUHEDRAL
PLAGIOCLASE ( 3%)
Size(mm): 0.5-1.0 Morphology: EUHEDRAL
Groundmass - PLAGIOCLASE ( 32%)
Size(mm): 0.05-0.2 Morphology: SKELETAL
CLINOPYROXENE ( 40%)
Size(mm): 0.02-0.1 Morphology: FEATHERY,DENDRITIC
OPAQUE MINERALS ( TR%)
Size(mm): 0.01-0.03
MICROCRYST GROUNDMASS ( 20%)
Alteration - CALCITE ( 0.5%)
Location: VESICLES
CLAY MINERALS ( 0.5%)
Location: VESICLES
Vesicles -
Size(mm): 0.5-0.7
Percent: 1
Filling: CALCITE,
Shape: IRREGULAR
Filling: CLAY.MIN
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