Leg : 39 Top/Bottom Interval(mm): 750/ 790 Describer: Fodor, R.
Hole: 355 Top of Core Depth(m) : 442.50 Rock Type: IGNEOUS
Core: 21 Sample Midpoint(m) : 443.27 Sect/Pc #: 1/
ROCK = BASALT
ALTERED*
Groundmass - PLAGIOCLASE
Size(mm): 0.1-0.5
ZONING NORMAL BY CARLSBAD AND ALBITE METHOD,
ALTERATION INTENSE;
CLINOPYROXENE
Size(mm): 0.1-0.4
PLAG AND HIGH-CA PYX IN A BROWN HIGHLY OXIDIZED
GROUNDMASS THAT PROBABLY WAS ORIGINALLY SILICATES
PLUS GLASS, CPX IN VARIOUS STAGES ALTERATION;
OLIVINE
COMPLETELY OXIDIZED, OUTLINES ONLY;
OXIDES
DUST-SIZED PARTICLES;
Alteration - CALCITE
Location: VEINS,
Location: PATCHES
ZEOLITE
Leg : 39 Top/Bottom Interval(mm): 1050/ 0 Describer: Fodor, R.
Hole: 355 Top of Core Depth(m) : 442.50 Rock Type: IGNEOUS
Core: 21 Sample Midpoint(m) : 443.55 Sect/Pc #: 1/
ROCK = APHYRIC BASALT
RARE PHENOS OF PLAG+HIGH CA-PYX+ALTERED OL;
Texture: APHYRIC*
Groundmass - PLAGIOCLASE ( 15%)
Size(mm): .2-1 Morphology: LATHS
APPROX COMP AN65,NORMAL ZONING,CARLSBAD+ALBITE
TWINNING,SOME MINOR ALTERATION,GLOMEROCRYSTS,
RANGES IN SIZE FROM MICROLITES TO PHENOS OF 1MM,
VISUAL ESTIMATE OF PERCENTAGE;
CLINOPYROXENE ( 4%)
Size(mm): .2-.4
EXTINCTION ANGLE OFF C-AXIS=25-30 DEGREES,CLEAR TO
GREENISH,ZONED,SOME ALTERATION,VISUAL ESTIMATE OF
PERCENTAGE;
OPAQUE MINERALS
INCLUDES MAGN?,DUST SIZE PARTICLES SCATTERED;
OLIVINE ( 1%)
Size(mm): .3-.5
COMPLETELY ALTERED,OUTLINES OF RELICT XTLS
PRESENT,GROUNDMASS IS OF ALTERED SILICATE AND
POSSIBLE ORIGINAL GLASS WITH MINOR FELDSPAR LATHS,
GROUNDMASS-WHICH MAY HAVE BEEN GLASSY IN PARTS-
IS NOW XTLLIZED TO TINY PLATELETS AND FIBERS,
PERHAPS CRISTOBALITE IN PART,VISUAL ESTIMATE OF OL
PERCENTAGE*
Vesicles -
Filling: ZEOLITES
FIBROUS FILLING MINERAL-POSSIBLY ZEOLITES*
Leg : 39 Top/Bottom Interval(mm): 680/ 0 Describer: Fodor, R.
Hole: 355 Top of Core Depth(m) : 452.00 Rock Type: IGNEOUS
Core: 22 Sample Midpoint(m) : 452.68 Sect/Pc #: 1/
ROCK = APHYRIC BASALT
RARE PHENOS OF PLAG+HIGH CA-PYX+ALTERED OL;
Texture: APHYRIC*
Groundmass - PLAGIOCLASE ( 25%)
Size(mm): .1-.7
ONE PHENO PRESENT ALSO,APPROX COMP AN60,NORMAL
ZONING,CARLSBAD+ALBITE TWINNING,SOME ALTERATION;
CLINOPYROXENE ( 10%)
Size(mm): .1-.5
SOME ALTERATION,ONE PHENO ALSO PRESENT;
OLIVINE
COMPLETELY ALTERED TO OPAQUE FE-OXIDES-OXIDE
GRAINS PRESENT AS DUST-SIZED PARTICLES THROUGHOUT
GROUNDMASS AS 3% OF ROCK;
OPAQUE MINERALS
INCLUDES MAGN?,DUST SIZED,GRAY GROUNDMASS IS OF
HIGHLY ALTERED SILICATE AND POSSIBLE ORIGINAL
GLASS*
Leg : 39 Top/Bottom Interval(mm): 440/ 0 Describer: Fodor, R.
Hole: 355 Top of Core Depth(m) : 452.00 Rock Type: IGNEOUS
Core: 22 Sample Midpoint(m) : 453.94 Sect/Pc #: 2/
ROCK = APHYRIC BASALT
FEW PHENOS OF PLAG+HIGH CA-PYX PRESENT
(GLOMEROCRYSTS);
Texture: APHYRIC*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): .1-1 Morphology: LATHS
APPROX COMP AN60,NORMAL ZONING,CARLSBAD+ALBITE
TWINNING,MINOR ALTERATION,VISUAL ESTIMATE OF %;
CLINOPYROXENE ( 20%)
Size(mm): .1-.4
EXTINCTION ANGLE OFF C-AXIS=20-25 DEGREES,CLEAR TO
LIGHT-GREENISH COLOR,ZONING PRESENT,SOME
ALTERATION;
OLIVINE
COMPLETELY OXIDIZED,OXIDES SCATTERED THROUGHOUT
GROUNDMASS,MOSTLY AS DUST SIZED PARTICLES MAKE UP
2% OF ROCK;
OPAQUE MINERALS
INCLUDES MAGN?,MOSTLY DUST SIZED,GROUNDMASS
CONSISTS OF PLAG LATHS+HIGH CA-PYX IN A GRAY
ALTERED MASS OF SILICATES AND POSSIBLY ORIGINAL
GLASS*
Alteration - ZEOLITE
A FEW AREAS OF SECONDARY MINERALIZATION ARE
PRESENT,PROBABLY ZEOLITES OR FE-MG LARGER LATTICE
SILICATES*
Leg : 39 Top/Bottom Interval(mm): 120/ 0 Describer: Fodor, R.
Hole: 355 Top of Core Depth(m) : 452.00 Rock Type: IGNEOUS
Core: 22 Sample Midpoint(m) : 455.12 Sect/Pc #: 3/
ROCK = APHYRIC BASALT
Texture: APHYRIC*
Groundmass - PLAGIOCLASE ( 5%)
Size(mm): .1-.7 Morphology: CLUSTERS
NORMAL ZONING,CARLSBAD+ALBITE TWINNING,SOME
ALTERATION,VISUAL ESTIMATE OF PERCENTAGE;
CLINOPYROXENE ( 3%)
Size(mm): .1-.4 Morphology: CLUSTERS
MODERATE ALTERATION;
OLIVINE ( TR%)
COMPLETELY ALTERED-OUTLINES OF ORIGINAL OL REMAIN
BUT ORIGINAL OL IS ALTERED TO FE-MG LARGER LATTICE
SILICATES;
OPAQUE MINERALS
INCLUDES MAGN?,DUST-SIZED,PLAG+HIGH CA-PYX SET IN
GROUNDMASS OF HIGHLY ALTERED SILICATES PLUS
POSSIBLE ORIGINAL GLASS,OXIDES(1% OF ROCK) PRESENT
AS DUST-SIZED PARTICLES IN GROUNDMASS*
Vesicles -
Filling: ZEOLITES OR
Filling: LARGER LATTICE
Filling: SILICATES
ID UNCERTAIN FOR FILLING MATERIAL-GREENISH IN
COLOR*
Leg : 39 Top/Bottom Interval(mm): 1200/ 0 Describer: Fodor, R.
Hole: 355 Top of Core Depth(m) : 452.00 Rock Type: IGNEOUS
Core: 22 Sample Midpoint(m) : 459.20 Sect/Pc #: 5/
ROCK = APHYRIC BASALT
ONE PLAG PHENO PRESENT;
Texture: APHYRIC,SUBOPHITIC*
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): .2-.5 Morphology: LATHS
RELATIVELY FRESH,APPROX COMP AN50-60,LITTLE NORMAL
ZONING,MOSTLY CARLSBAD TWINNING;
CLINOPYROXENE ( 45%)
Size(mm): .1-.3
LIGHT GREEN COLOR,ZONING PRESENT,MUCH IS HIGHLY
ALTERED PROBABLY TO AN FE-MG LARGER LATTICE
SILICATE;
OLIVINE ( 0%)
ANY OL OR INTERSTITIAL GLASS OR FELDSPAR THAT MAY
HAVE BEEN PRESENT IS CERTAINLY ALTERED;
TITANOMAGNETITE
Morphology: ANHEDRAL
OXIDE GRAINS-ID UNCERTAIN FOR TI-MAGN-ARE
INTERGRANULAR TO PYX+PLAG*
Alteration - SILICATE ( 22%)
FE-MN LARGER LATTICE SILICATES*
Vesicles -
Filling: CARBONATE
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