Leg : 54 Top/Bottom Interval(mm): 500/ 570 Describer: Fodor, R.
Hole: 420 Top of Core Depth(m) : 109.00 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 117.49 Sect/Pc #: CC/PCE 1
ROCK = PLAG-CPX MICROPHYRIC BASALT;
Texture: INTERSERTAL,MICROPHYRIC*
Phenocrysts- PLAGIOCLASE ( 18.4%)
Size(mm): <0.15 Morphology: ELONGATED
APPROX COMP AN65;
CLINOPYROXENE ( 4.7%)
Size(mm): <0.10
APPROX COMP FS10W040*
Groundmass - GLASS ( 70.8%)
% BASED ON POINT COUNS,SOME HYDRATION
AND INCIPIENT ALTERATION;
TITANOMAGNETITE ( 2%)
Size(mm): <0.005 Morphology: SKELETAL,DENDRITIC
Alteration - CLAY MINERALS ( 2.1%)
Location: VESICLES
YELLOW-GREENISH LAYERED LATTICE STRUCTURE*
Vesicles -
Percent: 6.3
Filling: CLAY.MINS
Leg : 54 Top/Bottom Interval(mm): 00/ 80 Describer: Dmitriev, Y.
Hole: 420 Top of Core Depth(m) : 118.50 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 118.54 Sect/Pc #: 1/PCE 1
ROCK = APHYRIC BASALT
ALTERATION FRESH;
Texture: INTERSERTAL;
Where sampled: ISOLATED FRAGMENT*
Groundmass - PLAGIOCLASE ( 46.5%)
Size(mm): 0.6X0.08 Morphology: LATHS
SEPARATE CRYSTALS,INTERGROWTH,APPROX COMP AN52;
CLINOPYROXENE ( 27.7%)
Size(mm): 0.1 Morphology: IRREGULAR GRAINS
SEPARATE XTLS, INTERGROWTH;
COMBINATION ( 24.1%)
INCLUDES GLASS+MAGN+ILMENITE,MAGN XTLS ARE
EMBRYONIC,PERCENTAGES BY POINT COUNT*
Alteration - CLAY MINERALS ( 0.2%)
Location: VESICLES, Replacing: GLASS
Location: GROUNDMASS
AMOUNT INCLUDES CHLORITE;
CHLORITE
Replacing: VOLCANIC GLASS
Vesicles -
Size(mm): 0.2
Percent: 1.5
Shape: ROUND
SOME VESICLES HAVE GREEN CLAY MINERALS*
Leg : 54 Top/Bottom Interval(mm): 00/ 80 Describer: Srivastava, R.K.
Hole: 420 Top of Core Depth(m) : 118.50 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 118.54 Sect/Pc #: 1/PCE 1
ROCK = APHYRIC BASALT;
Texture: INTERSERTAL-SUBOPHITIC;
Groundmass - PLAGIOCLASE ( 50%)
CLINOPYROXENE ( 30%)
SOME CPX XTLS SHOW GLASSY INCLUSIONS,
ARRANGED IN IRREGULAR PATTERNS;
COMBINATION ( 20%)
INCLUDES GLASS+MAGN+ILMENITE*
Alteration - CHLORITE ( .2%)
Replacing: CPX
ALTERATION IS CONFINED ONLY TO PARTS OF THE
SECTION,IN GENERAL THE ROCK IS RATHER FRESH,
IDENTITY UNCERTAIN FOR CHLORITE*
Leg : 54 Top/Bottom Interval(mm): 150/ 190 Describer: Srivastava, R.K.
Hole: 420 Top of Core Depth(m) : 128.00 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 128.17 Sect/Pc #: 1/PCE 3
ROCK = PLAG-CPX-OL MOD MICROPHYRIC BASALT;
Texture: GLASSY,PARTIALLY VARIOLITIC,MICROPHYRIC*
Phenocrysts- OLIVINE ( 1.4%)
PLAGIOCLASE ( 5.0%)
Morphology: LATHS
APPROX COMP AN 65,SOME SHOW OSCILLATORY ZONING AND
THE MARGINS ARE MORE SODIC;
CLINOPYROXENE ( 1.8%)
FERROUS OXIDE ( TR%)
ALL OF ABOVE ARE MICROPHENOCRYSTS COMPRISING
ABOUT 2-3 PCT OF ROCK*
Groundmass - GLASS ( 90.5%)
GROUNDMASS COMPLETELY GLASSY,DARK BROWN WITH
SLIGHT DEVITRIFICATION,PERCENTAGES OBTAINED BY
POINT COUNT*
Vesicles -
Size(mm): <1
Percent: 1.3
Shape: ROUND
Leg : 54 Top/Bottom Interval(mm): 220/ 270 Describer: Dmitriev, Y.
Hole: 420 Top of Core Depth(m) : 128.00 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 128.25 Sect/Pc #: 1/PCE 4
ROCK = PLAG-OL-CPX MOD MICROPHYRIC BASALT;
Texture: MICROPORPHYRITIC,SEMI-VARIOLITIC*
Phenocrysts- OLIVINE ( .7%)
Size(mm): 0.1X1.5 Morphology: EUHEDRAL
PLAGIOCLASE ( 3%)
Size(mm): 0.5X0.7 Morphology: TABULAR,LATHS
SEPARATE GRAINS AND GLOMEROPHYRIC AGGREGATES,
APPROX COMP AN 80;
CLINOPYROXENE ( 2%)
Size(mm): 0.2 Morphology: TABULAR LATHS
SEPARATE GRAINS AND GLOMEROPHYRIC AGGREGATES*
Groundmass - PLAGIOCLASE ( 22.2%)
Size(mm): 0.4X0.02
CLINOPYROXENE ( 4.4%)
COMBINATION ( 66.8%)
INCLUDES MAGN+ILMENITE+GLASS+OPX+CPX,PERCENTAGES
OBTAINED BY POINT COUNT*
Alteration - CLAY MINERALS ( 5%)
Replacing: VOLCANIC GLASS
Vesicles -
Size(mm): 0.1
Percent: 0.9
Filling: CLAY.MINS
Shape: IRREGULAR
Leg : 54 Top/Bottom Interval(mm): 690/ 720 Describer: Fodor, R.
Hole: 420 Top of Core Depth(m) : 128.00 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 128.71 Sect/Pc #: 1/PCE 9
ROCK = APHYRIC BASALT;
Texture: GLASSY,MICROPORPHYRITIC*
Groundmass - PLAGIOCLASE ( 11.1%)
Size(mm): <0.1 Morphology: LONG,NEEDLE-LIKE
APPROX COMP AN 65;
CLINOPYROXENE ( 1.7%)
Size(mm): <0.06
APPROX COMP FS10W040;
OLIVINE ( <0.1%)
TITANOMAGNETITE ( TR%)
Size(mm): 0.001
GLASS ( 86.6%)
HYDRATED,INCIPIENT ALTERATION,PERCENTAGES OBTAINED
BY POINT COUNT*
Alteration - CLAY MINERALS ( .3%)
Location: VESICLES
YELLOW-GREENISH,LAYERED LATTICE SILICATES*
Vesicles -
Percent: .3
Leg : 54 Top/Bottom Interval(mm): 20/ 100 Describer: Dmitriev, Y.
Hole: 420 Top of Core Depth(m) : 137.50 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 137.56 Sect/Pc #: 1/PCE 1
ROCK = PLAG-OL-CPX MOD PHYRIC BASALT;
Texture: MICROPORPHYRITIC,VARIOLITIC*
Phenocrysts- OLIVINE ( 1.3%)
Size(mm): 0.8X0.4 Morphology: EUHEDRAL
PLAGIOCLASE ( 8.8%)
Size(mm): 0.5X0.08 Morphology: LATHS
SEPARATE XSTLS AND AGGREGATES;
CLINOPYROXENE ( 4.4%)
Size(mm): 0.2 Morphology: TABULAR GRAINS
SEPARATE XTLS AND AGGREGATES;
Groundmass - MICROCRYST GROUNDMASS ( 83.3%)
INCLUDES PLAG+CPX+MAGN,CRYPTOCRYSTALLINE WITH
MICROLITES OF PLAG,EMBRYONIC XTLS OF CPX+MAGN,
GROUNDMASS DARK BROWN,NEARLY OPAQUE,PERCENTAGES
OBTAINED BY POINT COUNT*
Vesicles -
Size(mm): 0.3
Percent: 2.8
Filling: EMPTY
Shape: SPHERICAL
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