Leg : 73 Top/Bottom Interval(mm): 1070/ 0 Describer: Carman, M.
Hole: 520 Top of Core Depth(m) : 436.50 Rock Type: IGNEOUS
Core: 29 Sample Midpoint(m) : 437.57 Sect/Pc #: 1/
ROCK = PLAG PHYRIC BASALT;
Texture: PHYRIC,VARIOLITIC-ELONGATE;
Where sampled: LOOSE FRAGMENT IN SEDIMENTS*
Phenocrysts- PLAGIOCLASE (20-25%)
Size(mm): .25-4.0
POSSIBLY SODIC, R.I.<ARALDITE,PROBABLY AB, APPROX
COMP AN<50 POSSIBLY <30*
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): .01-.26 Morphology: ELONGATE
APPROX COMP AN-OLIGOCLASE, VERY SMALL EXTINCTION
ANGLE PARALLEL TO 010;
MAGNETITE ( 3-5%)
Size(mm): .04-1.0 Morphology: CUBIC
POSSIBLY METAMORPH., INTERGROWN WITH AND/OR CROSS-
CUTTING PLAG PHENO*
Alteration - HEMATITE
Replacing: MAGN
SPHENE
Replacing: PLAG
ZEOLITE
ID UNCERTAIN FOR ZEOLITES, FIBROUS, INTERGROWN
WITH CHLORITE;
EPIDOTE
Replacing: PLAG
CHLORITE
Location: VEINS Replacing: PLAG
Leg : 73 Top/Bottom Interval(mm): 920/ 0 Describer: Carman, M.
Hole: 520 Top of Core Depth(m) : 446.00 Rock Type: IGNEOUS
Core: 30 Sample Midpoint(m) : 446.92 Sect/Pc #: 1/PCE 5
ROCK = OL-PLAG MODERATELY MICROPHYRIC BASALT;
Texture: APHYRIC-MICROPHYRIC,GLASSY-VARIOLITIC TO
VARIOLITIC-ELONGATE;
Where sampled: GLASSY MARGIN*
Phenocrysts- OLIVINE ( 3-5%)
Size(mm): .05.30 Morphology: EUHEDRAL
2VZ 85, APPROX COMP FO>85;
PLAGIOCLASE ( <1%)
Size(mm): .25-.60 Morphology: EUHEDRAL,TABULAR
2VX <90,APPROX COMP AN>60,SINGLE+GLOMEROPORPHYRIT*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): <.01-.7 Morphology: ELONGATE(HOLLOW,TAPERED)
CLINOPYROXENE ( 40%)
Size(mm): <.012
PLUMOSE CHAIN LINKED TO PLAG;
OPAQUE MINERALS ( 15%)
Size(mm): .001-.010 Morphology: PLATES + CUBES?
INTERGROWN WITH AUGITE, INCLUDES MAGN + ILMENITE*
Vesicles -
Size(mm): .01-.5
Percent: 1
Location: SCATTERED
Filling: YELLOW SMEC
Shape: ROUNDED
Leg : 73 Top/Bottom Interval(mm): 1060/ 0 Describer: Carman, M.
Hole: 520 Top of Core Depth(m) : 446.00 Rock Type: IGNEOUS
Core: 30 Sample Midpoint(m) : 447.06 Sect/Pc #: 1/PCE 7
ROCK = OL SPARSELY MICROPHYRIC BASALT;
Texture: APHYRIC-MICROPHYRIC,SPINIFEX-VARIOLITIC;
CF COARSER END OF 30-1-89-95-5;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( <1%)
Size(mm): .6
FRESH*
Leg : 73 Top/Bottom Interval(mm): 70/ 0 Describer: Carman, M.
Hole: 520 Top of Core Depth(m) : 450.50 Rock Type: IGNEOUS
Core: 31 Sample Midpoint(m) : 450.57 Sect/Pc #: 1/PCE 1A,B
ROCK = PLAG SPARSELY MICROPHYRIC BASALT;
Texture: APHYRIC-MICROPHYRIC,SPINIFEX
Where sampled: PILLOW INTERIOR*
TENDING TOWARD ADVANCED SPINIFEX*
THIS IS 1ST GEN. PLAG, 2VZ 80-85;
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): 1.0-2.0 Morphology: ANHEDRAL
POSSIBLY CORRODED*
Groundmass - OLIVINE (10-15%)
Size(mm): .04-.25 Morphology: EUHEDRAL,EQUANT,ELONGATE
FRESH, 2VZ <90,APPROX COMP FO>85, 2V 90,APPROX
COMP FO80-85;
PLAGIOCLASE (35-40%)
Size(mm): .2-1.0 Morphology: SKELETAL,SW.TAILS,HOLLOW BOX
PLAGIOCLASE
Size(mm): .04-.05 Morphology: TWINNED MICRO-SPINES
THIS IS 2ND GEN. PLAG, APPROX COMP AN70-75 IN 1B;
OPAQUE MINERALS ( 5-10%)
Size(mm): .002-.040 Morphology: CUBES,PLATES,SERRATED SKEL
INCLUDES MAGN+ILMENITE,INTERSTITIAL BETWEEN PLAG
AND INTIMATELY INTERGROWN W/ SKELETAL AUGITE;
CLINOPYROXENE (35-40%)
Morphology: SKELETAL,PLUMOSE,CHAIN-LINK
0.1-0.4 UNITS*
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