Leg : 73 Top/Bottom Interval(mm): 170/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 153.00 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 153.17 Sect/Pc #: 1/PCE 3
ROCK = PLAG SPARSELY MICROPHYRIC BASALT;
Texture: MICROPORPHYRITIC,VARIOLITIC-ELONGATE;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): .05-4.1 Morphology: EUHEDRAL LATHS,BLOCKY
2VX 80+,R.I.>1.55,APPROX COMP AN80 +,MANY WITH
SODIC SPINIFEX PRONGS,NARROW SODIC RIMS;
Groundmass - OLIVINE ( 1-3%)
Size(mm): .06 Morphology: SKELETAL,CHAIN,EUHEDRAL,
IN GLASS ON BORDER;
PLAGIOCLASE ( 30%)
Size(mm): .05-.3 Morphology: ELONGATE,RADIAL SHEAVES,
Morphology: SWALLOWTAIL
FLOW ALIGNED PARALLEL TO GLASSY SELVAGE;
CLINOPYROXENE ( 35%)
GLASS ( 30%)
MOSTLY DEVT., INTERSTITIAL TO INTERSERTAL,BEAUTIFUL
GRADATION FROM VARIOLITIC TO SPINIFEX ACROSS SLIDE
FROM GLASSY SELVAGE*
Alteration - CARBONATE ( <1%)
Location: CALCITE VEIN
Leg : 73 Top/Bottom Interval(mm): 560/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 153.00 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 153.56 Sect/Pc #: 1/PCE 7
ROCK = PLAG SPARSELY MICROPHYRIC BASALT;
Texture: APHYRIC-MICROPHYRIC,ELONGATE,VARIOLITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): .04-.80 Morphology: EUHEDRAL,LATH,BLOCKY
2VX 85,APPROX COMP AN80+,GLOMEROPORPHYRITIC CLUST*
Groundmass - OLIVINE ( 1-3%)
Size(mm): .02-.04 Morphology: EUHEDRAL-SUBHEDRAL,EQUANT
2VX 85,APPROX COMP F80;
PLAGIOCLASE (30-35%)
Size(mm): .01-.3 Morphology: ELONGATE SKEL,RADIAL SHEAVES
CLINOPYROXENE (30-35%)
Morphology: PLUMOSE-ELONGATE
INTERSTIT BETWEEN PLAG;
GLASS ( 30%)
INTERSTITIAL WITH PYX, MUCH POSSIBLY IS PYX*
Leg : 73 Top/Bottom Interval(mm): 730/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 153.00 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 153.73 Sect/Pc #: 1/PCE 9
ROCK = PLAG SPARSELY MICROPORPHYRITIC BASALT;
Texture: MICROPORPHYRITIC, VARIOLITIC-ELONGATE;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): .05-.8 Morphology: EUHEDRAL
2VX 85, R.I.=1.57,APPROX COMP AN72-75 ON EDGE OF
GRAIN,GLOMEROPORPHYRITIC CLUSTERS 2 MM LONG*
Groundmass - OLIVINE ( 3-5%)
Size(mm): .04-.07 Morphology: EUHEDRAL-ANHEDRAL
SOME INTERGROWN WITH PLAG;
PLAGIOCLASE ( 40%)
Size(mm): .05-.6 Morphology: ELONGATE,HOLLOW BOXES,
Morphology: SHEAVES, SWALLOWTAIL
CLINOPYROXENE (20-30%)
Morphology: PLUMOSE ELONGATE,INTERSTITIAL
OPAQUE MINERALS ( 5-10%)
Size(mm): .002-.008 Morphology: EUHEDRAL CUBES, PLATES
INTERSTIT BETWEEN PLAG,INCLUDES MAGN + ILMENITE,
MORPHOLOGY UNCERTAIN;
GLASS (20-30%)
Morphology: VARIOLITIC TO ELONGATE,
Morphology: INTERSTITIAL,INTERSERTAL
Leg : 73 Top/Bottom Interval(mm): 1110/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 153.00 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 154.11 Sect/Pc #: 1/PCE 13
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SUBOPHITIC, SPARSELY PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): 0.1-1.5 Morphology: EUHEDRAL
GLOMEROPORPHYRITIC CLUSTERS*
Groundmass - OLIVINE ( 3-5%)
Size(mm): .08
INTERSTITIAL, OPTICALLY NEGATIVE;
PLAGIOCLASE ( 40%)
Size(mm): .02-.6 Morphology: SKELETAL
R.I. >1.55,APPROX COMP AN55-65 BY CARLSBAD-AB, 2VZ
85-90,APPROX COMP AN70-75;
CLINOPYROXENE ( 40%)
Size(mm): .01-.25 Morphology: SUBOPHITIC,INTERGRANULAR
2VZ 60;
OPAQUE MINERALS ( 15%)
Morphology: EUHEDRAL
INCLUDES MAGN + ILMENITE*
Alteration - COMBINATION ( <5%)
Location: INTERSTITIAL Replacing: OL
Location: BETWEEN PLAG
INCLUDES FE.OX + IDDINGS,ID UNCERTAIN FOR IDDINGS*
Leg : 73 Top/Bottom Interval(mm): 120/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 153.00 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 154.62 Sect/Pc #: 2/PCE 1B
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SUBOPHITIC,INTERSERTAL, SPARSELY MICROPHYRIC,
INTERGRANULAR,DIABASIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <1%)
ESSENTIALLY LOST IN GNDMASS-RECOGNIZED BY
GLOMEROPORPHYRITIC CLUSTERS*
Groundmass - OLIVINE ( 2-3%)
Morphology: EUHEDRAL
OPTICALLY NEGATIVE, INTERSTITIAL
PLAGIOCLASE ( 40%)
Size(mm): .2-.8 Morphology: EUHEDRAL-SUBHEDRAL
APPROX COMP AN50-35 BY A-NORMAL,ZONED GRAIN .35MM;
CLINOPYROXENE ( 40%)
Morphology: OPHITIC-DIABASIC
OPAQUE MINERALS ( 15%)
INCLUDES MAGN + ILMENITE*
Alteration - CLAY MINERALS ( 5-10%)
Location: INTERSERTAL Replacing: GLASS
Location: PATCHES
INCLUDES SMEC;
CHLORITE ( 5%)
Location: SMEC OR WITH Replacing: GLASS
Location: SAPONITIC MIN
Location: IN INTERSERT.
Location: PATCHES
Leg : 73 Top/Bottom Interval(mm): 510/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 153.00 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 155.01 Sect/Pc #: 2/PCE 4
ROCK = APHYRIC BASALT;
Texture: APHYRIC,OPHITIC,INTERSERTAL SERIATE;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 5-10%)
Size(mm): .02-.08
2V 90,APPROX COMP F80-85, IN INTERSTITIAL BETWEEN
OPHITIC PATCHES;
PLAGIOCLASE ( 40%)
Size(mm): .06-1.7 Morphology: SUBHEDRAL-ANHEDRAL
THIS IS 1ST GEN. PLAG, 2VZ 75-80-APPROX COMP AN60,
2VZ 85-APPROX COMP AN72, 2VZ 85-90-APPROX COMP
AN75+,APPROX COMP AN60-43-ZONED BY CARLSBAD-AB,
APPROX COMP AN70 BY CARLSBAD-AB,APPROX COMP AN70
BY A-NORMAL, IN OPHITIC PATCHES;
PLAGIOCLASE ( <1%)
Size(mm): .04-.08 Morphology: SKELETAL,SW.TAIL,HOLLOW
THIS IS 2ND GEN. PLAG,SWALLOWTAIL IN INTERSERIAL
PATCHES W/ HOLLOW;
CLINOPYROXENE ( 40%)
Size(mm): .4-3.0 Morphology: OPHITIC
OPAQUE MINERALS (10-15%)
Morphology: CUBIC EQUANT,PLATY HEXAGONS
CONCENTRATED IN INTERSERTAL PATCHES WITH OL*
Alteration - SAPONITE
Location: IN PATCHES Replacing: OL
Location: BETWEEN OPH.
Location: CLOTS
ID UNCERTAIN FOR SAPONITE- POSSIBLY NONTRONITE,
HIGH BIREFRINGENCE,OLIVE-GREEN*
Leg : 73 Top/Bottom Interval(mm): 130/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 160.50 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 160.63 Sect/Pc #: 1/PCE 1A
ROCK = APHYRIC BASALT;
Texture: APHYRIC,OPHITIC,INTERSERTAL SERIATE;
Where sampled: FLOW INTERIOR
CF 7-2-PCE 4*
Groundmass - OLIVINE
Size(mm): .04-.13
PLAGIOCLASE
Size(mm): .05-.8
2V 90,APPROX COMP AN80,APPROX COMP AN56 BY
CARLSBAD-AB;
CLINOPYROXENE
Size(mm): .2-2.0 Morphology: OPHITIC,EUHED,SUBHEDRAL
INTERGRANULAR EUHED GRAINS SHOW COMPOSITION ZONING
IN BIREFRINGENCE*
Alteration - SAPONITE
Replacing: OL
ID UNCERTAIN FOR SAPONITE, POSSIBLY NONTRONITE*
Leg : 73 Top/Bottom Interval(mm): 920/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 160.50 Rock Type: UNIDENTIFIED
Core: 8 Sample Midpoint(m) : 161.42 Sect/Pc #: 1/PCE 3A
ROCK = APHYRIC BASALT
BASALTIC BRECCIA;
Texture: APHYRIC,ELONGATE;
Where sampled: NEXT TO GLASSY MARGIN*
Groundmass - OLIVINE ( <1%)
Size(mm): .01-.02
CORES OF RADIATING PLAG SHEAVES;
PLAGIOCLASE ( 20%)
Size(mm): .02-.20 Morphology: SWALLOWTAILS,SKELETAL
RADIATING SHEAVES;
CLINOPYROXENE (10-20%)
Morphology: ANHEDRAL
INTERSTITIAL BETWEEN PLAG;
GLASS (60-70%)
EXTENSIVELY DEVT. WITH SUGGESTIONS OF PLUMOSE
TEXTURE, POSSIBLY AUGITE*
Leg : 73 Top/Bottom Interval(mm): 1230/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 160.50 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 161.73 Sect/Pc #: 1/PCE 3E
ROCK = APHYRIC BASALT;
Texture: APHYRIC,INTERSERTAL,ADVANCED SPINIFEX,OPHITIC-
SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 5%)
Size(mm): .01-.06 Morphology: EUHEDRAL
INTERGRANULAR;
PLAGIOCLASE (35-40%)
Size(mm): .02-.50 Morphology: EUHEDRAL,ELONGATE,SKELETAL
CHAIN LINK XTLS,CENTRAL INCLUSIONS;
CLINOPYROXENE (35-40%)
Size(mm): .1 Morphology: PLUMOSE,OPHITIC,SUBOPHITIC
SUBOPHITIC DEVELOPING FROM PLUMOSE,PLUMOSE
VISIBLE;
OPAQUE MINERALS ( 5-10%)
Size(mm): <.01
INCLUDES MAGN + ILMENITE;
GLASS (10-20%)
Morphology: INTERSERTAL
Alteration - SAPONITE
Replacing: OL
ID UNCERTAIN FOR SAPONITE,POSSIBLY GRIFFITHITE*
Leg : 73 Top/Bottom Interval(mm): 480/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 160.50 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 162.48 Sect/Pc #: 2/PCE 1E
ROCK = APHYRIC BASALT;
Texture: APHYRIC,INTERSERTAL,ADVANCED SPINIFEX;
Where sampled: FLOW INTERIOR;
CF 8-1-123-PCE 3E*
Groundmass - OLIVINE
Size(mm): .1 Morphology: EUHEDRAL
2VX <90,APPROX COMP FO<85,FRESHER THAN 8-1-123-3E;
PLAGIOCLASE
Size(mm): .02-.06
CLINOPYROXENE
Size(mm): .05-.2 Morphology: PLUMOSE,OPHITIC,INTERGRANULAR
SOME WELL XTALLIZED CLEAR GRAINS*
Vesicles -
Size(mm): .05-1.0
Percent: <1
Filling: CALCITE
Shape: IRREGULAR
Leg : 73 Top/Bottom Interval(mm): 540/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 160.50 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 162.54 Sect/Pc #: 2/PCE 1F
ROCK = APHYRIC BASALT;
SEE 8-2-480-1E*
Leg : 73 Top/Bottom Interval(mm): 1300/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 160.50 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 163.30 Sect/Pc #: 2/PCE 1P
ROCK = APHYRIC BASALT;
Texture: APHYRIC,SUBOPHITIC,INTERSERTAL;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 8-10%)
Size(mm): .01-.17 Morphology: EUHEDRAL
2V 90,APPROX COMP FO85,SLIGHTLY ALT. TO EXT.ALT.,
CENTRAL INCLUSIONS COMMON;
PLAGIOCLASE (35-40%)
Size(mm): .04-1.04 Morphology: EUHEDRAL-SUBHEDRAL
APPROX COMP AN65-48 BY CARLSBAD-AB, 2V 90,APPROX
COMP AN72,SOME RADIAL SHEAVES INTERGROWN WITH PYX,
MOSTLY SKELETAL WITH PYX CORES;
CLINOPYROXENE (35-40%)
Size(mm): .04-.8 Morphology: SUBOPH,OPH,EUHED,CRSE PLUMOSE
OPAQUE MINERALS (10-15%)
Size(mm): .004-.05 Morphology: SUBHEDRAL,EUHEDRAL
MOSTLY INTERSTITIAL, INCLUDES MAGN + ILMENITE;
GLASS ( 3-5%)
Morphology: INTERSERTAL
POSSIBLY DEVT. PALAG*
Alteration - CARBONATE ( <1%)
Location: VESICLES
CLAY MINERALS
Replacing: GLASS
SAPONITE ( 3-5%)
Location: VESICLES Replacing: OL
ID UNCERTAIN FOR SAPONITE-POSSIBLY GRIFFITHITE,
HIGH BIREFRINGENCE,BROWN*
Vesicles -
Size(mm): .2-.5
Percent: <1
Filling: CALCITE,SMEC,
Shape: VERY IRREG
Filling: SAPONITE
SAPONITE OR SMECTITE LINES VESICLES*
Leg : 73 Top/Bottom Interval(mm): 830/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 160.50 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 164.33 Sect/Pc #: 3/PCE 2C
ROCK = APHYRIC BASALT;
Texture: APHYRIC,OPHITIC,INTERSERTAL;
CF 8-2-130-1P;
Where sampled: FLOW INTERIOR*
Groundmass - PLAGIOCLASE
APPROX COMP AN72-23 BY CARLSBAD-AB;
CLINOPYROXENE
OPHITIC SLIGHTLY DOMINANT*
Leg : 73 Top/Bottom Interval(mm): 890/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 160.50 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 164.39 Sect/Pc #: 3/PCE 2D
ROCK = APHYRIC BASALT;
SEE 8-3-830-2C*
Groundmass - OLIVINE
2VX=88-90,APPROX COMP F085,FRESH*
Leg : 73 Top/Bottom Interval(mm): 160/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 160.50 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 165.16 Sect/Pc #: 4/PCE 1B
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PHYRIC,INTERSERTAL,ADVANCED SPINIFEX;
CF 8-2-48-1E,8-2-54-1F;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): .5 Morphology: EUHEDRAL-TABULAR
ONE GRAIN ONLY SEEN*
CF 8-2-48-1E,8-2-54-1F*
Leg : 73 Top/Bottom Interval(mm): 1340/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 160.50 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 166.34 Sect/Pc #: 4/PCE 7B
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PHYRIC,INTERSERTAL,SUBOPHITIC,ADVANCED
SPINIFEX
TEX BETWEEN 8-1-92-3A AND 8-1-123-3E;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): .3-1.5 Morphology: EUHEDRAL
Groundmass - OLIVINE ( 5%)
Size(mm): .01-.02 Morphology: EUHEDRAL
INTERGRANULAR, MODERATELY ALTERED;
PLAGIOCLASE (30-35%)
Size(mm): .018-.25 Morphology: SUBHEDRAL-SKELETAL
PYX FILLED CORES;
CLINOPYROXENE ( 35%)
Morphology: INTERSTIT PLUMOSE TO OPHITIC
VERY FINE GRAINED;
OPAQUE MINERALS ( 10%)
Size(mm): .001-.01 Morphology: INTERSTITIAL
INCLUDES MAGN + ILMENITE;
DEVITRIFIED GLASS ( 20%)
Morphology: INTERSTITIAL
SPINEL
Size(mm): .01
ID UNCERTAIN FOR SPINEL, POSSIBLY ISOTROPIC*
Alteration - SAPONITE
Replacing: OL
INCLUDES GRIFFITHITE*
Vesicles -
Size(mm): .1-.3
Percent: <1
Location: SCATTERED
Filling: CALCITE
Shape: IRREG
Leg : 73 Top/Bottom Interval(mm): 350/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 171.50 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 171.85 Sect/Pc #: 1/PCE 1C
ROCK = APHYRIC BASALT;
Texture: APHYRIC,INTERSERTAL,ADVANCED SPINIFEX;
Where sampled: FLOW INTERIOR CLOSE TO MARGIN*
CF 8-2-48-1E,8-2-54-1F BUT THESE ARE SLIGHTLY
COARSER-GRAINED*
Leg : 73 Top/Bottom Interval(mm): 590/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 171.50 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 172.09 Sect/Pc #: 1/PCE 1E
ROCK = APHYRIC BASALT;
SEE 9-1-350-1C*
Leg : 73 Top/Bottom Interval(mm): 210/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 171.50 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 173.21 Sect/Pc #: 2/PCE 1C
ROCK = APHYRIC BASALT;
Texture: APHYRIC,SUBOPHITIC,INTERSERTAL*
CF 8-2-130-1P BUT THESE ARE A SHADE COARSER
GRAINED*
Leg : 73 Top/Bottom Interval(mm): 400/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 171.50 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 173.40 Sect/Pc #: 2/PCE 1E
ROCK = APHYRIC BASALT;
SEE 9-2-210-1C*
Leg : 73 Top/Bottom Interval(mm): 490/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 171.50 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 174.99 Sect/Pc #: 3/PCE 2A
ROCK = APHYRIC BASALT;
Texture: APHYRIC,OPHITIC,INTERSERTAL;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 5%)
Size(mm): .07-.17 Morphology: EUHEDRAL,EQUANT
EXTENSIVELY ALTERED, IN INTERSERTAL PATCHES;
PLAGIOCLASE ( 30%)
Size(mm): .05-2.2 Morphology: SUBHEDRAL,SOME W/ ELONGATE
PATCHES IN CORE,
APPROX COMP AN65-58 BY CARLSBAD-AB, 2V 90,2VZ 85,
APPROX COMP AN65-75;
CLINOPYROXENE ( 30%)
Size(mm): .08-1.8 Morphology: OPHITIC,INTERGRANULAR
OPAQUE MINERALS ( 10%)
Size(mm): .005-.12 Morphology: CUBES,HEXAGONAL PLATES
THIS IS 1ST GEN. OP.MINS,LARGER INTERGRANULAR,
INCLUDES MAGN + ILMENITE;
OPAQUE MINERALS
Size(mm): <.001
THIS IS 2ND GEN. OP.MINS, VERY FINE, IN ALT.GLASS+
MATRIX AND IN ALT.OL,INTERSERTAL GLASS, INCLUDES
MAGN + ILMENITE;
DEVITRIFIED GLASS ( 20%)
Morphology: INTERSERTAL,CRYPTXLN
Alteration - COMBINATION
Location: INTERSTITIAL Replacing: OL
LOCATION BETWEEN OPHITIC PATCHES,
INCLUDES GRIFFITHITE*
Leg : 73 Top/Bottom Interval(mm): 600/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 171.50 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 175.10 Sect/Pc #: 3/PCE 2B
ROCK = APHYRIC BASALT;
SEE 9-3-490-2A*
Leg : 73 Top/Bottom Interval(mm): 970/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 171.50 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 176.97 Sect/Pc #: 4/PCE 3H
ROCK = APHYRIC BASALT;
Texture: APHYRIC,OPHITIC,INTERSERTAL
Where sampled: FLOW INTERIOR;
CF 9-3-49-6A,9-3-60-2B BUT FINER-GRAINED AND
FRESHER*
Leg : 73 Top/Bottom Interval(mm): 380/ 0 Describer: Carman, M.
Hole: 519A Top of Core Depth(m) : 171.50 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 177.88 Sect/Pc #: 5/PCE 4
ROCK = ALTERED BASALT;
Texture: APHYRIC TO MICROPHYRIC,GLASSY,INTERSERTAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): .08-.96 Morphology: EUHEDRAL
2V 90,APPROX COMP AN80;
ORTHOPYROXENE ( <1%)
Size(mm): .07-.16 Morphology: EUHEDRAL
2VX 790,LOW BIREFRINGENCE(.009),ID UNCERTAIN FOR
OPX*
Groundmass - OLIVINE ( 3-5%)
Size(mm): .03-.13 Morphology: EUHEDRAL
EXTENSIVELY ALTERED;
PLAGIOCLASE (35-40%)
Size(mm): .02-.3 Morphology: ELONGATE,SOME SKELETAL,BOXY,
Morphology: TAPERED
CLINOPYROXENE (35-40%)
Morphology: PLUMOSE,FINE COMBS
INTERSERTAL BETWEEN PLAG;
OPAQUE MINERALS ( 0%)
GLASS ( 25%)
Morphology: ULTRAFINE PYX+PLAG FIBERS
Alteration - CARBONATE
Replacing: PLAG PHENOS
SAPONITE
Location: THROUGHOUT Replacing: OL
INCLUDES GRIFFITHITE,ORANGE BROWN;
CHLORITE
Location: SPARSE Replacing: OL
GREEN,PLEOCHROIC*
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