Leg : 74 Top/Bottom Interval(mm): 100/ 0 Describer: O'Connell, S.
Hole: 527 Top of Core Depth(m) : 341.50 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 341.60 Sect/Pc #: 1/PCE 1A
ROCK = PLAG-OL-CPX PHYRIC BASALT;
Texture: SUBOPHITIC,INTERGRANULAR,PHYRIC;
Where sampled: FLOW INTERIOR NEAR TOP IN ALT AREA*
Phenocrysts- OLIVINE ( 2.3%)
Size(mm): 2X1 Morphology: EUHEDRAL-SUBHEDRAL
EXTENSIVELY ALTERED;
PLAGIOCLASE ( 12%)
Size(mm): 4X3 Morphology: SUBHEDRAL,ZONED,TWINNED
ALTERED CPX INCLUSIONS;
CLINOPYROXENE ( <1%)
Size(mm): 1.1X.3 Morphology: SUBHEDRAL
Groundmass - OLIVINE ( 11%)
Size(mm): .12X.16 Morphology: SUBHEDRAL
PLAGIOCLASE ( 38%)
Size(mm): .64X.08 Morphology: LATHS
CLINOPYROXENE ( 23%)
Size(mm): .4X.3 Morphology: ANHEDRAL
EXTENSIVE ALTERED BETWEEN OL+PLAG+CPX GRAINS;
MAGNETITE ( 4%)
Size(mm): .03X.04 Morphology: SUBHEDRAL-IRREGULAR
Alteration - CLAY MINERALS ( 15%)
Location: OL INTERIORS, Replacing: OL,CPX
Location: GROUNDMASS
VERY BRIGHT GREEN COLOR FOR OL INTERIOR;
MICROLITE ( 1%)
Location: PLAG
Location: INTERIORS
Vesicles -
Percent: 0
Leg : 74 Top/Bottom Interval(mm): 690/ 730 Describer: Richardson, S.H.
Hole: 527 Top of Core Depth(m) : 341.50 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 343.71 Sect/Pc #: 2/PCE 1E
ROCK = PLAG-CPX SPARSELY PHYRIC BASALT;
Texture: INTERGRANULAR,SPARSELY PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): 1.5X.5 Morphology: STUBBY LATHS,ZONED,TWINNED
CLINOPYROXENE ( <1%)
Size(mm): .5X.3 Morphology: SUBHEDRAL
APPROX COMP AUGITE*
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): .5X.15 Morphology: EUHEDRAL LATHS,TWINNED
CLINOPYROXENE ( 45%)
Size(mm): .15X.15 Morphology: SUBHEDRAL
MAGNETITE ( 3%)
Size(mm): .1X.05 Morphology: SKELETAL
Alteration - CLAY MINERALS ( 5%)
Location: GROUNDMASS Replacing: FE.MG MINS
BROWN*
Vesicles -
Percent: 0
Leg : 74 Top/Bottom Interval(mm): 350/ 390 Describer: Richardson, S.H.
Hole: 527 Top of Core Depth(m) : 341.50 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 346.37 Sect/Pc #: 4/PCE 1D
ROCK = PLAG-OL SPARSELY PHYRIC BASALT
EXTENSIVELY ALTERED;
Texture: INTERGRANULAR,SPARSELY PHYRIC*
Phenocrysts- OLIVINE ( <1%)
Size(mm): .5X.5 Morphology: EUHEDRAL
EXTENSIVELY ALT TO CLAY;
PLAGIOCLASE ( 2%)
Size(mm): 5X3 Morphology: GLOMEROCRYSTS,TWINNED,ZONED
SURROUNDED BY QUENCH SHEAF TEXTURED ZONE (1MM)*
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): .6X.2 Morphology: EUHEDRAL LATHS,TWINNED
CLINOPYROXENE ( 45%)
Size(mm): .2X.1 Morphology: SUBHEDRAL
MAGNETITE ( 3%)
Size(mm): .1X.05 Morphology: SKELETAL
Alteration - CLAY MINERALS ( 5%)
Location: GROUNDMASS Replacing: FE.MG MINS
Vesicles -
Percent: 0
Leg : 74 Top/Bottom Interval(mm): 530/ 550 Describer: Richardson, S.H.
Hole: 527 Top of Core Depth(m) : 346.50 Rock Type: IGNEOUS
Core: 40 Sample Midpoint(m) : 347.04 Sect/Pc #: 1/PCE 3C
ROCK = PLAG-CPX SPARSELY PHYRIC BASALT;
Texture: INTERGRANULAR,SPARSELY PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): 2X1 Morphology: STUBBY LATHS,TWINNED,ZONED
CLINOPYROXENE ( <1%)
Size(mm): 1.5X1 Morphology: SUBHEDRAL
APPROX COMP AUGITE, SMALL INCLUDED PLAG LATHS*
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): .5X.1 Morphology: EUHEDRAL LATHS
TWINNED;
CLINOPYROXENE ( 45%)
Size(mm): .2X.1 Morphology: SUBHEDRAL
MAGNETITE ( 3%)
Size(mm): .05X.05 Morphology: SKELETAL
Alteration - CLAY MINERALS ( 5%)
Location: GROUNDMASS Replacing: FE.MG MINS
BROWN*
Vesicles -
Percent: 0
Leg : 74 Top/Bottom Interval(mm): 360/ 390 Describer: Richardson, S.H.
Hole: 527 Top of Core Depth(m) : 346.50 Rock Type: IGNEOUS
Core: 40 Sample Midpoint(m) : 348.38 Sect/Pc #: 2/PCE 1E
ROCK = PLAG-CPX-OL PHYRIC BASALT
EXTENSIVELY ALTERED;
Texture: PHYRIC,SUBOPHITIC GROUNDMASS;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): .6X.3 Morphology: EUHEDRAL
EXTENSIVELY ALT TO CLAY.MINS;
PLAGIOCLASE ( 20%)
Size(mm): 10X5 Morphology: STUBBY LATHS,ZONED,TWINNED
APPROX COMP LABRADORITE;
CLINOPYROXENE ( 2%)
Size(mm): 1X1.5 Morphology: SUBHEDRAL
APPROX COMP AUGITE*
Groundmass - PLAGIOCLASE ( 37%)
Size(mm): .6X.1 Morphology: LATHS,TWINNED
CLINOPYROXENE ( 37%)
Size(mm): .3X.2 Morphology: SUBHEDRAL
MAGNETITE ( 3%)
Size(mm): .06X.06 Morphology: SUBHEDRAL
Alteration - CLAY MINERALS ( 1%)
Replacing: OL
Vesicles -
Percent: 0
Leg : 74 Top/Bottom Interval(mm): 1050/1100 Describer: Richardson, S.H.
Hole: 527 Top of Core Depth(m) : 346.50 Rock Type: IGNEOUS
Core: 40 Sample Midpoint(m) : 349.08 Sect/Pc #: 2/PCE 1I
ROCK = PLAG-CPX PHYRIC BASALT;
Texture: PHYRIC,SUBOPHITIC GROUNDMASS;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 25%)
Size(mm): 12X5 Morphology: STUBBY LATHS,ZONED,TWINNED
APPROX COMP LABRADORITE;
CLINOPYROXENE ( 1%)
Size(mm): .6X.6 Morphology: SUBHEDRAL
APPROX COMP AUGITE*
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): .6X.1 Morphology: LATHS,TWINNED
CLINOPYROXENE ( 35%)
Size(mm): .3X.2 Morphology: SUBHEDRAL
MAGNETITE ( 4%)
Size(mm): .06X.06 Morphology: SUBHEDRAL
Alteration - CLAY MINERALS ( 2%)
Location: GROUNDMASS Replacing: CPX
BROWN*
Vesicles -
Percent: 0
Leg : 74 Top/Bottom Interval(mm): 280/ 320 Describer: Richardson, S.H.
Hole: 527 Top of Core Depth(m) : 350.50 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 353.80 Sect/Pc #: 3/PCE 1B
ROCK = PLAG-CPX PHYRIC BASALT;
Texture: PHYRIC,SUBOPHITIC GROUNDMASS*
Phenocrysts- PLAGIOCLASE ( 25%)
Size(mm): 12X5 Morphology: STUBBY LATHS,ZONED,TWINNED
APPROX COMP LABRADORITE;
CLINOPYROXENE ( 1%)
Size(mm): .8X1 Morphology: SUBHEDRAL
SLIGHTLY ALT TO BROWN CLAY,APPROX COMP AUGITE*
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): .6X.1 Morphology: LATHS,TWINNED
CLINOPYROXENE ( 35%)
Size(mm): .3X.2 Morphology: SUBHEDRAL
MAGNETITE ( 4%)
Size(mm): .06X.06 Morphology: SUBHEDRAL
Alteration - CLAY MINERALS ( 5%)
Location: GROUNDMASS Replacing: CPX
BROWN*
Vesicles -
Percent: 0
Leg : 74 Top/Bottom Interval(mm): 1030/1050 Describer: Richardson, S.H.
Hole: 527 Top of Core Depth(m) : 350.50 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 357.54 Sect/Pc #: 5/PCE 4A
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SUBOPHITIC,SPARSELY PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 4X1 Morphology: EUHEDRAL LATHS,TWINNED,ZONED
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): .5X.1 Morphology: EUHEDRAL LATHS,TWINNED
CLINOPYROXENE ( 48%)
Size(mm): .2X.2 Morphology: ANHEDRAL
APPROX COMP AUGITE;
MAGNETITE ( <1%)
Size(mm): .02X.02
Alteration - CLAY MINERALS ( 3%)
Location: GROUNDMASS Replacing: CPX
GREEN AND BROWN*
Vesicles -
Percent: 0
Leg : 74 Top/Bottom Interval(mm): 890/ 920 Describer: Richardson, S.H.
Hole: 527 Top of Core Depth(m) : 359.50 Rock Type: IGNEOUS
Core: 42 Sample Midpoint(m) : 364.91 Sect/Pc #: 4/PCE 1D
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SUBOPHITIC,SPARSELY PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): 3X2 Morphology: STUBBY LATHS
SLIGHTLY ALT*
Groundmass - PLAGIOCLASE ( 55%)
Size(mm): .5X.2 Morphology: STUBBY LATHS
CLINOPYROXENE ( 40%)
Size(mm): .1X.1 Morphology: ANHEDRAL
EXTENSIVELY ALT;
MAGNETITE ( 5%)
Size(mm): .15X.1 Morphology: SUBHEDRAL,SKELETAL
Alteration - CLAY MINERALS ( 15%)
Location: GROUNDMASS Replacing: CPX
PALE BROWN*
Leg : 74 Top/Bottom Interval(mm): 680/ 720 Describer: Richardson, S.H.
Hole: 527 Top of Core Depth(m) : 368.50 Rock Type: IGNEOUS
Core: 43 Sample Midpoint(m) : 369.20 Sect/Pc #: 1/PCE 1D
ROCK = APHYRIC BASALT;
Texture: PEGMATITIC,APHYRIC;
Where sampled: FLOW INTERIOR
"PEGMATITIC ZONE"*
Groundmass - PLAGIOCLASE ( 55%)
Size(mm): 3X1 Morphology: LATHS
CLINOPYROXENE ( 40%)
Size(mm): 10X1 Morphology: ELONGATE LATHS
EXTENSIVELY ALT;
MAGNETITE ( 3%)
Size(mm): .2X.2 Morphology: SKELETAL
PYRITE ( >2%)
Size(mm): .3X.3 Morphology: EUHEDRAL,TRIANGULAR,HEXAGONAL
APATITE ( <.5%)
Size(mm): 1.5X.02 Morphology: NEEDLES
Alteration - CLAY MINERALS ( 10%)
Replacing: CPX
Vesicles -
Percent: 0
Leg : 74 Top/Bottom Interval(mm): 450/ 470 Describer: Richardson, S.H.
Hole: 527 Top of Core Depth(m) : 368.50 Rock Type: IGNEOUS
Core: 43 Sample Midpoint(m) : 370.46 Sect/Pc #: 2/PCE 1B
ROCK = APHYRIC BASALT;
Texture: SUBOPHITIC,INTERGRANULAR,APHYRIC;
Where sampled: FLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): .6X.3 Morphology: STUBBY LATHS
CLINOPYROXENE ( 40%)
Size(mm): .1X.1 Morphology: ANHEDRAL
EXTENSIVELY ALTERED;
MAGNETITE ( 5%)
Size(mm): .15X.1 Morphology: SUBHEDRAL,SKELETAL
APATITE ( .5%)
Size(mm): .6X.01 Morphology: TINY PRISMS
ASSOCIATED W/ MESOSTASIS;
MESOSTASIS ( 5%)
Size(mm): .3X.2 Morphology: INTERSTITIAL
ALT TO RICH BROWN MATERIAL*
Alteration - CLAY MINERALS ( 10%)
Replacing: CPX AND MESOSTAS
Leg : 74 Top/Bottom Interval(mm): 490/ 520 Describer: Richardson, S.H.
Hole: 527 Top of Core Depth(m) : 377.50 Rock Type: IGNEOUS
Core: 44 Sample Midpoint(m) : 378.01 Sect/Pc #: 1/PCE 1D
ROCK = APHYRIC BASALT;
Texture: SUBOPHITIC/INTERGRANULAR,APHYRIC,COARSE-GRAINED,
Where sampled: FLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): .7X.2 Morphology: EUHEDRAL LATHS,TWINNED
CLINOPYROXENE ( 37%)
Size(mm): .3X.2 Morphology: SUBHEDRAL,TWINNED,ZONED
MAGNETITE ( 3%)
Size(mm): .2X.1 Morphology: SKELETAL
OTHER ( 10%)
FINE-GRAINED IN INTERSTICES,INCLUDES PLAG+CPX
GROUNDMASS*
Alteration - CLAY MINERALS ( 5%)
Location: INTERSTICES Replacing: CPX
Location: BETWEEN
Location: FELDSPARS
Vesicles -
Percent: 0
|
