Leg : 34 Top/Bottom Interval(mm): 480/ 510 Describer: Bunch, T.
Hole: 319A Top of Core Depth(m) : 98.00 Rock Type: IGNEOUS
Core: 1 Sample Midpoint(m) : 98.50 Sect/Pc #: 1/PCE 7
ROCK = PLAG-OL-PYX SPARSELY PHYRIC BASALT
SOURCE IS IR;
Texture: HYALOOPHITIC,MEDIUM-GRAINED,OPHITIC
INTERGRANULAR-VARIOLITIC,SPARSELY PHYRIC*
Groundmass - OLIVINE
PATCHES OF SMEC? MAY BE ALTERED OL;
PYROXENE
Size(mm): <.04-.02 Morphology: SHEAF-LIKE+PLUMOSE
SMALL AUGITES SLIGHTLY ZONED,SOME TINY(<.01MM)FE-
RICH INTERSTITIAL FERROAUGITE;
PLAGIOCLASE
Size(mm): <1 Morphology: LATHS
LARGE LATHS(>.4MM)HAVE CORE APPROX COMP AN81
SLIGHTLY ZONED TO RIMS WITH APPROX COMP AN75,
SMALLER LATHS SIMILARLY ZONED FROM AN57 TO AN47;
GROUNDMASS PLAG APPROX COMP AN45-42;
OPAQUE MINERALS
Size(mm): <.1 Morphology: SKELETAL
TI-MAGN*
Alteration - SMECTITE
Replacing: OL
COMPOSED OF RED,BROWN,RED-BROWN,AND GREENISH BROWN
SMEC,MN-OXIDE,AND MINOR CALCITE*
Leg : 34 Top/Bottom Interval(mm): 1100/1110 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 98.00 Rock Type: IGNEOUS
Core: 1 Sample Midpoint(m) : 99.11 Sect/Pc #: 1/PCE 18
ROCK = BASALT;
Texture: FINELY QUENCHED,PLUMOSE,VERY FINE-GRAINED
COARSER GRAINED THAN PIECE 17,
ALL OF MICROPHENOS ALTERED TO FE-OXIDE AND RARE
CARBONATE*
Alteration - CALCITE
Location: VEIN
VEIN WITH FE-OXIDE AND LOCAL LARGE XTLS(WHICH ARE
STRAINED);
FERROUS OXIDE
Location: VEIN Replacing: MICROPHENOS
CARBONATE
Replacing: MICROPHENOS
Leg : 34 Top/Bottom Interval(mm): 1380/1420 Describer: Donaldson, C.H.
Hole: 319A Top of Core Depth(m) : 98.00 Rock Type: IGNEOUS
Core: 1 Sample Midpoint(m) : 99.40 Sect/Pc #: 1/PCE 22
ROCK = APHYRIC BASALT
SOURCE IS IR;
Texture: APHYRIC,FINE-GRAINED*
Groundmass - OLIVINE
Size(mm): .1 Morphology: SKELETAL
APPROX COMP FO85;
PLAGIOCLASE
Size(mm): .5X.05 Morphology: GLOMEROPHYRIC
CORE TO RIM APPROX COMP AN73.1-65.4;
AUGITE
APPROX COMP CA33-35.8*
Leg : 34 Top/Bottom Interval(mm): 270/ 0 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 107.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 107.77 Sect/Pc #: 1/PCE 5
ROCK = PLAG-OL-CPX MICROPHYRIC BASALT;
Texture: MICROPHYRIC, SPHERULITIC,SUBOPHITIC;
Phenocrysts- PLAGIOCLASE
OLIVINE
Morphology: SUBOPHITIC
SUBOPHITICALLY ENCLOSES PLAG;
CLINOPYROXENE
Groundmass - GLASS
MICROPHENOS IN QUENCHED GLASS AND SPHERULITES*
Leg : 34 Top/Bottom Interval(mm): 1110/ 0 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 107.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 108.61 Sect/Pc #: 1/PCE 17
ROCK = PLAG PHYRIC DIABASE;
Texture: INTERGRANULAR, RADIAL, SPARSELY PHYRIC;
Phenocrysts- PLAGIOCLASE
OLIVINE ( 0%)
Groundmass - OLIVINE
Morphology: EUHEDRONS
NOT CLEARLY GROUNDMASS, GREEN CORES IN SOME OF
THEM- SMEC?, CELADONITE?;
PYROXENE
Morphology: INTERGRANULAR,RADIAL
Alteration - SULFIDE
Location: VEIN
VEIN IS IRREGULAR AND ANASTOMOSING;
SMECTITE
Location: OLIVINE CORES
ID UNCERTAIN;
CELADONITE
Location: OLIVINE CORES
ID UNCERTAIN*
AMYGDULES SURROUNDED BY TANGENTIAL PLAG*
Leg : 34 Top/Bottom Interval(mm): 1110/1140 Describer: Bunch, T.
Hole: 319A Top of Core Depth(m) : 107.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 108.63 Sect/Pc #: 1/PCE 17
ROCK = PLAG-OL-PYX SPARSELY PHYRIC DIABASE
SOURCE IS IR;
Texture: COARSE VARIOLITIC,GLOMEROPORPHYRITIC,OPHITIC,
SPARSELY PHYRIC*
Phenocrysts- PLAGIOCLASE ( <1-1%)
Size(mm): <2
OLIVINE ( <1-1%)
PYROXENE
Groundmass - OLIVINE
POSSIBLE PATCHES OF SMEC AFTER OL;
PYROXENE ( 32%)
Size(mm): <.05 Morphology: SHEAF-LIKE+GRANULAR
ZONED;
PLAGIOCLASE ( 48%)
Size(mm): <2 Morphology: LATHS-GLOMEROCRYSTS
CORE APPROX COMP AN82-76 FOR GLOMEROCRYSTS WITH
OUTER MARGIN ZONING CONTINUOUS TO AN34, LATH
APPROX COMP AN65-48,GROUNDMASS PLAG (<.01MM)
APPROX COMP AN15-12;
OPAQUE MINERALS ( 5%)
Size(mm): <.12 Morphology: ANHEDRAL EQUANT-ELONGATE
TI-MAGN;
OTHER ( 8%)
GLOMEROCRYSTS;
OTHER ( 7%)
FINE-GRAINED INTERSTITIAL MATERIAL+SECONDARY
MINERALS*
Alteration - SMECTITE
SULFIDE
CALCITE
ARAGONITE
OTHER
PHILLIPSITE*
Vesicles -
Filling: SMEC,CARBONATE,
Filling: PHILLIPSITE,
Filling: SULFIDE
LINED BY GREEN,DARK GRAY,RED OR BLUISH-GRAY SMEC*
Leg : 34 Top/Bottom Interval(mm): 1430/1460 Describer: Scott, R.
Hole: 319A Top of Core Depth(m) : 107.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 108.95 Sect/Pc #: 1/
ROCK = BASALT
SOURCE IS IR*
Alteration - COMBINATION
1MM WIDE UNIFORM VEIN WITH THE FOLLOWING SEQUENCE
ACROSS THE VEIN: ROCK-IRON OXIDE-ARAGONITE-
SMECTITE-IRON OXIDE-ROCK;
OTHER ( 16%)
Location: GROUNDMASS
APPROX 16% OF ROCK CONSISTS OF FINE-GRAINED
GREENISH-BROWN ALTERATION PRODUCTS IN THE
GROUNDMASS*
Leg : 34 Top/Bottom Interval(mm): 1440/1500 Describer: Scott, R.
Hole: 319A Top of Core Depth(m) : 107.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 108.97 Sect/Pc #: 1/
ROCK = BASALT
SOURCE IS IR*
Alteration - COMBINATION
.1MM WIDE ANASTOMOSING VEIN OF PYRITE AND BLUE-
GREEN TO EMERALD-GREEN SMECTITE;
OTHER ( 12%)
Location: GROUNDMASS
BROWN ALTERATION PRODUCTS IN THE GROUNDMASS*
Leg : 34 Top/Bottom Interval(mm): 1140/ 0 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 107.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 110.14 Sect/Pc #: 2/PCE 15
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY MICROPHYRIC, INTERGRANULAR,MINOR
VARIOLITIC;
Phenocrysts- PLAGIOCLASE ( RARE%)
Groundmass - PYROXENE
Morphology: INTERGRANULAR
OLIVINE
Morphology: ANHEDRAL TO SUBHEDRAL
SMALL*
Alteration - SMECTITE
Replacing: OL
Leg : 34 Top/Bottom Interval(mm): 1140/1170 Describer: Donaldson, C.H.
Hole: 319A Top of Core Depth(m) : 107.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 110.16 Sect/Pc #: 2/PCE 15
ROCK = PLAG PHYRIC BASALT
SOURCE IS IR;
Texture: PHYRIC,MEDIUM-GRAINED,INTERGRANULAR,INTERSERTAL*
Phenocrysts- PLAGIOCLASE
APPROX COMP AN81.9-73.4*
Groundmass - PLAGIOCLASE
Morphology: GLOMEROCRYSTS
CORE TO RIM APPROX COMP AN63.8-34.8
AUGITE
APPROX COMP CA34.6-43.6*
Leg : 34 Top/Bottom Interval(mm): 1290/1330 Describer: Scott, R.
Hole: 319A Top of Core Depth(m) : 107.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 110.31 Sect/Pc #: 2/
ROCK = BASALT
SOURCE IS IR*
Alteration - COMBINATION
.1MM WIDE ANASTOMOSING VEIN OF IRON OXIDES AND
CALCITE;
OTHER ( 10%)
Location: GROUNDMASS
YELLOWISH-BROWN ALTERATION PRODUCTS IN THE
GROUNDMASS*
Leg : 34 Top/Bottom Interval(mm): 860/ 890 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 107.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 111.38 Sect/Pc #: 3/
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PHYRIC*
Phenocrysts- PLAGIOCLASE
RARE,LARGE FOR PLAG,BUT SMALLER THAN PYX*
Groundmass - OLIVINE
ONE ALTERED OL IS REPLACED BY A MASS WITH BLUISH
FIRST ORDER COLORS REMINISCENT OF ANTIGORITE;
ALBITE
FINE GRAINED;
PYROXENE
Size(mm): TO 1.8
OPHITIC,QUENCHED GROUNDMASS COMPOSED OF NUMEROUS
MINERALS IN A SMECTITE MASS-SUGGESTS FLOW RATHER
THAN SILL;
OTHER
Morphology: SUBHEDRAL PRISMS
HIGH RELIEF WITH (+)OPTIC SIGN,2V NEAR ZERO AND
LOW BIREFRINGENCE(PIGEONITE?);
OTHER
Morphology: ANHEDRAL
LOW RELIEF MINERAL,WITH (+) OPTIC SIGN,2V NEAR
ZERO(APPARENTLY NOT QUARTZ,PERHAPS A ZEOLITE OR
FELDSPATHOID)*
Alteration - CARBONATE
PROBABLY SECONDARY ALONG WITH SMECTITE*
BIOTITE
ID UNCERTAIN FOR BIOTITE-WEAKLY PLEOCHROIC,
POSSIBLY ALTERED;
AMPHIBOLE
Location: FIB Replacing: ROUS
ID UNCERTAIN FOR AMPHIBOLE-LOW EXTINCTION ANGLE,
LIKE THE BIOTITE TENDS TO EMANATE FROM SURFACES OF
PYX OR OPAQUES;
APATITE
Location: ACI Replacing: CULAR
Leg : 34 Top/Bottom Interval(mm): 780/ 810 Describer: Vallier, T.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 117.80 Sect/Pc #: 1/PCE 11
ROCK = PLAG-OL-CPX MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC INTERGRANULAR,OPHITIC-
VERY COARSE HYALOOPHITIC,SOMEWHAT RUNIC*
Phenocrysts- PLAGIOCLASE ( 1.3%)
Size(mm): TO 1.5
RARE ZONING (WEAK OSCILLATORY),APPROX COMP AN82-58
FOR PHENOS UP TO 2MM,AN81-48 FOR LATHS OVER 2MM;
OLIVINE ( 7.2%)
Size(mm): TO 1.5
NOW PSEUDOMORPHED BY SMEC + RARE CALCITE ALTHOUGH
A FEW FRESH REMNANTS ARE PRESENT;
CLINOPYROXENE
POIKILITIC,THE LARGE CPX GRAINS ENCLOSE PLAG + OL
XTLS IN SOME PARTS OF THE SECTION*
Groundmass - PLAGIOCLASE ( 51.0%)
Size(mm): 0.7-0.9 Morphology: ELONGATE
APPROX COMP AN58-60 BY MICHEL LEVY METHOD,ALBITE +
PERICLINE + CARLSBAD + COMPLEX TWINNING,GLASSY
MARGINS ALTERED TO SMEC;
CLINOPYROXENE ( 26.7%)
Size(mm): 0.4-0.5 Morphology: LONG SHEAVES
MOST CPX OCCURS INTERGRANULARLY WITH PLAG,RARE
TWINNING,NO ZONING,NO ALTERATION,2V 50,EXTINCTION
ANGLE Z-C 47-50;
OPAQUE MINERALS ( 6.1%)
Morphology: EUHEDRAL,SKELETAL,IRREGULAR
SOME CRYSTALLIZED ALONG TWIN PLANES IN PLAG
ALTHOUGH MOST ARE IN THE GROUNDMASS,PROBABLY
MAINLY TI-MAGN;
MESOSTASIS ( 7.7%)
THE MESOSTASIS (NO DOUBT GLASS ORIGINALLY) IS NOW
SMEC,PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Location: VESICLES Replacing: MESOSTASIS,OL,PLAG
ABUNDANT;
CALCITE ( TR%)
Replacing: OL
Vesicles -
Size(mm): 0.4
Percent: TR
Filling: SMEC
Leg : 34 Top/Bottom Interval(mm): 800/ 820 Describer: Bunch, T.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 117.81 Sect/Pc #: 1/PCE 10
ROCK = PLAG SPARSELY PHYRIC BASALT
SOURCE IS IR;
Texture: COARSE-GRAINED,POIKILOPHITIC,SPARSELY PHYRIC*
Phenocrysts- PLAGIOCLASE
Size(mm): 1.5-3 Morphology: SUBHEDRAL
CORE TO RIM APPROX COMP AN57 TO AN43 FOR PHENOS,
CORE TO RIM APPROX COMP AN54 TO AN37 FOR
MICROPHENOS*
Groundmass - PLAGIOCLASE
Size(mm): .2-2.5 Morphology: LATHS-ENCLOSED LATHS
APPROX COMP AN19-10;
PYROXENE
Size(mm): 2-7
OPHITIC PYX,ABUNDANT;
PYROXENE
Size(mm): .05-.4
GROUNDMASS PYX;
OPAQUE MINERALS
Size(mm): .01-.2 Morphology: EQUANT-SKELETAL
HIGH CONTENT*
Leg : 34 Top/Bottom Interval(mm): 140/ 170 Describer: Donaldson, C.H.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 118.66 Sect/Pc #: 2/PCE 1
ROCK = PLAG PHYRIC BASALT
SOURCE IS IR;
Texture: PHYRIC,MEDIUM-GRAINED,POIKILOPHITIC,INTERSERTAL*
Phenocrysts- PLAGIOCLASE
Size(mm): <1.5
APPROX COMP AN74.8-69.6*
Groundmass - PLAGIOCLASE
Morphology: GLOMEROCRYSTS
APPROX COMP AN64.4-32.6;
AUGITE
APPROX COMP CA35.4-41.9*
Leg : 34 Top/Bottom Interval(mm): 220/ 230 Describer: Scott, R.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 118.72 Sect/Pc #: 2/
ROCK = BASALT
SOURCE IS IR*
Groundmass - PYRITE
A SMALL AMOUNT OF PRIMARY PYRITE IS DISSEMINATED
IN THE ROCK*
Alteration - COMBINATION
.1MM WIDE ANASTOMOSING VEIN OF PYRITE AND BLUE-
GREEN TO EMERALD-GREEN SMECTITE AND A .1MM WIDE
VEIN OF PYRITE;
OTHER ( 10%)
Location: GROUNDMASS
ISOTROPIC BROWNISH ALTERATION PRODUCTS IN THE
GROUNDMASS*
Leg : 34 Top/Bottom Interval(mm): 420/ 490 Describer: Scott, R.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 118.96 Sect/Pc #: 2/
ROCK = BASALT
SOURCE IS IR*
Alteration - COMBINATION
2MM WIDE UNIFORM VEIN OF CALCITE AND REDDISH-BROWN
IRON OXIDES WITH THE FOLLOWING SEQUENCE ACROSS THE
VEIN:ROCK,DISCONTINUOUS LAYERS OF IRON OXIDES WITH
SOME MANGANIFEROUS PORTIONS,REDDISH-BROWN CALCITE,
DISCONTINUOUS LAYERS OF IRON OXIDES WITH SOME
MANGANIFEROUS PORTIONS,ROCKS;
OTHER ( 20%)
Location: GROUNDMASS
YELLOWISH-BROWN ALTERATION PRODUCTS*
Leg : 34 Top/Bottom Interval(mm): 620/ 630 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 119.13 Sect/Pc #: 2/PCE 7
ROCK = BASALT;
THE NEEDLES IN QUENCHED GROUNDMASS ARE NOT APATITE
AS HAVE INCLINED EXTINCTION,NEARLY PARALLEL,AND
(+) ELONGATION-AMPHIBOLE? ARE OFTEN PARALLEL
OPTICALLY OVER CONSIDERABLE AREA-SKELETAL(PLAG?-
NO-R.I. TOO HIGH-MAY BE DENDRITIC PYX),ANALYST
NOTED THIS ANOMALY IN OTHER SECTIONS AND COULD
NOT CONFIRM THE (-) ELONGATION OF APATITE*
Leg : 34 Top/Bottom Interval(mm): 810/ 870 Describer: Scott, R.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 119.34 Sect/Pc #: 2/
ROCK = BASALT
SOURCE IS IR*
Alteration - CALCITE
TWO 1MM WIDE UNIFORM CALCITE VEINS;
SMECTITE ( 9%)
Location: GROUNDMASS
YELLOWISH;
OTHER ( 7%)
Location: GROUNDMASS
REDDISH-BROWN ALTERATION PRODUCTS WITH HEMATITIC
OPTICAL CHARACTER*
Leg : 34 Top/Bottom Interval(mm): 840/ 860 Describer: Bunch, T.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 119.35 Sect/Pc #: 2/PCE 11,
ROCK = PLAG PHYRIC DIABASE
SOURCE IS IR;
Texture: COARSE-GRAINED,SUBOPHITIC-VARIOLITIC,
Piece #: ILOPHITIC,PHYRIC*
Phenocrysts- PLAGIOCLASE
Size(mm): 1.5-3 Morphology: SUBHEDRAL-LATH
SIZE RANGE FOR MICROPHENOS IS .08-1.2MM,APPROX
COMP FOR PHENOS AN60-41,FOR MICROPHENOS AN52-24*
Groundmass - PLAGIOCLASE
Size(mm): .05-.3
CORE TO RIM APPROX COMP AN28-18;
PYROXENE
Size(mm): 1-4
OPHITIC PYX(MICROPHENOS ARE .06-.9MM),SIMILAR TO
319A-3-1,80-82CM,PYX NUCLEATED AFTER PLAG;
OPAQUE MINERALS
Size(mm): <.15 Morphology: BLOCKY-ANHEDRAL
OTHER
INTERSERTAL AREAS+ALTERED GLASS*
Leg : 34 Top/Bottom Interval(mm): 1270/1300 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 119.79 Sect/Pc #: 2/PCE 14
ROCK = BASALT;
Groundmass - OLIVINE
PSEUDOMORPHS;
AUGITE
SOME SUBCALCIC AUGITE,2V APPROX 30 DEGREES*
Alteration - IDDINGSITE
RELICT-ORANGE-ON RIMS OF OL PSEUDOMORPHS,WHICH ARE
LIGHT BROWN INSIDE AND CLEARLY DISTINGUISHES THEM
FROM THE LIGHT GREEN,ALMOST ISOTROPIC GROUNDMASS*
Leg : 34 Top/Bottom Interval(mm): 1270/1300 Describer: Donaldson, C.H.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 119.79 Sect/Pc #: 2/PCE 14
ROCK = PLAG PHYRIC BASALT
SOURCE IS IR;
Texture: PHYRIC,MEDIUM-GRAINED,POIKILOPHITIC,INTERSERTAL
SIMILAR TO 319A-3-2-14-17*
Phenocrysts- PLAGIOCLASE
APPROX COMP AN78.8-67.5*
Groundmass - PLAGIOCLASE
CORE TO RIM APPROX COMP AN66.0-36.0;
AUGITE
APPROX COMP CA40-36*
Leg : 34 Top/Bottom Interval(mm): 460/ 490 Describer: Donaldson, C.H.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 120.47 Sect/Pc #: 3/PCE 4
ROCK = PLAG PHYRIC BASALT
SOURCE IS IR;
Texture: PHYRIC,MEDIUM-GRAINED,POIKILOPHITIC,INTERSERTAL
SIMILAR TO 319A-3-2-14-17*
Phenocrysts- PLAGIOCLASE
APPROX COMP AN85.1-76.9*
Groundmass - PLAGIOCLASE
CORE TO RIM APPROX COMP AN73.2-31.7;
AUGITE
APPROX COMP CA41.3-36.5*
Leg : 34 Top/Bottom Interval(mm): 640/ 670 Describer: Bunch, T.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 120.66 Sect/Pc #: 3/PCE 4
ROCK = PLAG SPARSELY PHYRIC DIABASE
SOURCE IS IR;
Texture: COARSE-GRAINED,SUBOPHITIC,SPARSELY PHYRIC*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): 1.2-2
MICROPHENO LATHS ARE .2-1.5MM,CORE TO RIM PHENO
APPROX COMP AN72-23,MICROPHENO AN60-20(THOSE IN
PYX,AN59-53)*
Groundmass - PLAGIOCLASE
APPROX COMP AN43-16;
PYROXENE
Size(mm): 2-7
OPHITIC PYX,MICROPHENOS ARE .05-.4MM,SIMILAR TO
319A-3-1,80-82CM;
OPAQUE MINERALS
Size(mm): .005-.7 Morphology: BLOCKY-SKELETAL
Alteration - SMECTITE
Location: VEINS
DARK GREEN,BLUE-GREEN AND BROWN;
CALCITE
Location: VEINS
OXIDATIVE ALTERATION AND STAINING POSTDATE VEIN
DEPOSITION*
Leg : 34 Top/Bottom Interval(mm): 1060/1090 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 121.08 Sect/Pc #: 3/PCE 8
ROCK = DIABASE;
Groundmass - OLIVINE
Morphology: EQUANT-STUBBY PRISMATIC
TINY GROUNDMASS GRAINS OF OL(?) RIMMED BY DEEP
GREEN SMECTITE,NOT SKELETAL,BUT AMONG LAST THINGS
TO XTLLIZE*
Leg : 34 Top/Bottom Interval(mm): 1060/1090 Describer: Vallier, T.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 121.08 Sect/Pc #: 3/PCE 8
ROCK = OL-PLAG-CPX MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,INTERGRANULAR-SUBOPHITIC*
Phenocrysts- OLIVINE ( 5.0%)
Size(mm): TO 1.2
COMPLETELY REPLACED BY SMEC WHICH OCCURS AS BOOK-
LIKE PLATES AND IRREGULAR SHEAF-LIKE STRUCTURES,
OL PSEUDOMORPHS,AVERAGE SIZE IS 0.5-0.7 MM WITH A
MAXIMUM SIZE OF 1.0-1.2 MM*
PLAGIOCLASE ( 2.0%)
Size(mm): TO 1.8
TO 1.8 MM IN DIAMETER,RARE ZONING,SOME ALTERATION
TO SMEC;
CLINOPYROXENE
Size(mm): 2.2-3.0
OPHITICALLY ENCLOSES PLAG XTLS,CLEAR TO SMOKY
GRAY,RARE TWINNING (SIMPLE),NO ZONING*
Groundmass - PLAGIOCLASE ( 52.0%)
Size(mm): 0.5-0.8 Morphology: ELONGATE
RARE ZONING,SOME ALTERATION TO SMEC,APPROX COMP
AN56-60;
CLINOPYROXENE ( 25.8%)
Size(mm): 0.3-0.5
PERCENTAGE IS TOTAL CPX (PHENOS + GROUNDMASS),
CLEAR TO SMOKY GRAY,RARE TWINNING (SIMPLE),NO
ZONING,NO ALTERATION,2V +42,EXTINCTION ANGLE
Z-C 50;
OPAQUE MINERALS ( 6.5%)
MESOSTASIS ( 8.7%)
THE MESOSTASIS OF SMEC IS NO DOUBT THE REPLACEMENT
OF A GLASSY MATERIAL,PERCENTAGES OBTAINED BY POINT
COUNT*
Alteration - SMECTITE
Location: VESICLES Replacing: MESOSTASIS,OL,PLAG
ABUNDANT,OL IS COMPLETELY REPLACED BY SMEC WHICH
OCCURS AS BOOK-LIKE PLATES AND IRREGULAR SHEAF-
LIKE STRUCTURES*
Vesicles -
Size(mm): 0.3-0.4
Filling: SMEC
RARE*
Leg : 34 Top/Bottom Interval(mm): 180/ 210 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 121.70 Sect/Pc #: 4/PCE 1
ROCK = BASALT;
Texture: FINE-GRAINED*
Groundmass - ALTERED GLASS
SMECTITE BASE MAY BE ALTERED GLASS,IN FINE GRAINED
GROUNDMASS-BROWN MINOR XTLLINE SPHERULITES LIKE
THOSE IN PILLOW MARGINS*
Leg : 34 Top/Bottom Interval(mm): 180/ 210 Describer: Donaldson, C.H.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 121.70 Sect/Pc #: 4/PCE 1
ROCK = OL-PLAG PHYRIC BASALT
SOURCE IS IR;
Texture: PHYRIC,MEDIUM-GRAINED,POIKILOPHITIC,INTERSERTAL
SIMILAR TO 319A-3-2-14-17*
Phenocrysts- OLIVINE
Size(mm): <3
CORE TO RIM APPROX COMP FO85.4-71;
PLAGIOCLASE
Size(mm): <1.3
APPROX COMP AN85.0-80.1*
Groundmass - OLIVINE
Morphology: GLOMEROCRYSTS
APPROX COMP FO80.0-76.0;
PLAGIOCLASE
Morphology: GLOMEROCRYSTS
CORE TO RIM APPROX COMP AN66.3-27.3;
AUGITE
APPROX COMP CA39-32*
Leg : 34 Top/Bottom Interval(mm): 1000/1030 Describer: Donaldson, C.H.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 122.51 Sect/Pc #: 4/PCE 6
ROCK = PLAG PHYRIC BASALT
SOURCE IS IR;
Texture: PHYRIC,MEDIUM-GRAINED*
Phenocrysts- PLAGIOCLASE
APPROX COMP AN77.9*
Groundmass - PLAGIOCLASE
APPROX COMP AN75.4-33.2 CORE TO RIM;
AUGITE
APPROX COMP CA43.2-34.2*
Leg : 34 Top/Bottom Interval(mm): 1250/1290 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 122.77 Sect/Pc #: 4/PCE 7
ROCK = DIABASE;
Groundmass - OTHER
Morphology: OVOID PRISMS
2V NEAR ZERO(PIGEONITE?-SEE 2-3-86-89),NEXT TO
PARTIALLY ALTERED OL 2V=0 DEGREES,OTHERS WITH LOW
2V,ALL ARE IN CONTACT WITH GROUNDMASS,HAVE OVOID
SHAPE AND TEND TO BE NEAR OL-THIS MAY BE
ACCIDENTAL,MANY HAVE 2V<35 OR 40 DEGREES,IN ONE
AREA OF GROUNDMASS THERE IS BROWN SPHERULITIC
DEVITRIFICATION OR QUENCHING PRODUCTS AS IN
CHILLED SELVAGES AND REMINISCENT OF SI-RICH
GROUNDMASS PATCHES IN MARE BASALTS(NEAR END OF
SECTION WITH SCRIBED LABEL)*
Alteration - ZEOLITE
RADIAL GROUNDMASS PATCHES OF PRIMARY(?) ZEOLITE
(LOW FIRST ORDER GRAY-PHILLIPSITE?),PARALLEL
EXTINCTION;
CALCITE
ID UNCERTAIN FOR GROUNDMASS CALCITE;
Leg : 34 Top/Bottom Interval(mm): 1400/1450 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 122.93 Sect/Pc #: 4/PCE 8
ROCK = PLAG SPARSELY PHYRIC DIABASE;
Texture: SPARSELY PHYRIC,FINE-GRAINED,INTERGRANULAR
MUCH REDUCED QUENCHED GROUNDMASS COMPARED TO
(3-4,125-129CM),MORE INTERGRANULAR (UNCOMMONLY
SUBOPHITIC) RATHER THAN OPHITIC;
Groundmass - OLIVINE
Alteration - CALCITE
Location: GROUNDMASS
Leg : 34 Top/Bottom Interval(mm): 120/ 160 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 123.14 Sect/Pc #: 5/PCE 1
ROCK = PLAG SPARSELY PHYRIC DIABASE;
Texture: SPARSELY PHYRIC,INTERGRANULAR TO SUBOPHITIC
QUENCHING EFFECTS AS CONTACT IS APPROACHED;
Groundmass - PYROXENE
Morphology: RADIAL,VARIOLITIC
MINOR AMOUNTS*
Leg : 34 Top/Bottom Interval(mm): 350/ 380 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 123.37 Sect/Pc #: 5/PCE 2
ROCK = OL-PLAG PHYRIC BASALT
Texture: INTERGRANULAR TO OPHITIC, MUCH QUENCHED
GROUNDMASS,LOCAL VARIOLITIC TENDENCY,BROWN
QUENCH SPHERULITES- VERY FINE-GRAINED AS ON
CHILLED SELVAGES- SEEN LOCALLY IN GROUNDMASS;
Phenocrysts- OLIVINE
MUCH FRESH OL, DESCRIBER DOES NOT SAY IF
PHENOS OR GROUNDMASS*
PLAGIOCLASE
CORE OF LARGE OVOID PHENO (8X5MM):
X'= 1.569-1.575,MAINLY 1.573,AN78-90,
MAINLY AN80-87,
Z'= 1.577-1.581,MAINLY 1.578,AN82-91,
MAINLY AN85 (010)*
Groundmass - PYROXENE
STRONG "SECTOR" EXTINCTION*
Alteration - CALCITE
Location: GROUNDMASS
Leg : 34 Top/Bottom Interval(mm): 370/ 410 Describer: Donaldson, C.H.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 123.39 Sect/Pc #: 5/PCE 2
ROCK = OL-PLAG PHYRIC BASALT
SOURCE IS IR;
Texture: PHYRIC,MEDIUM-GRAINED,POIKILOPHITIC,INTERSERTAL
SIMILAR TO 319A-3-2-14-17*
Phenocrysts- OLIVINE
CORE TO RIM APPROX COMP FO88.8-79.5;
PLAGIOCLASE
APPROX COMP AN80.5-75.1*
Groundmass - PLAGIOCLASE
CORE TO RIM APPROX COMP AN65.4-30.6;
AUGITE
APPROX COMP CA41-37.3*
Leg : 34 Top/Bottom Interval(mm): 620/ 690 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 123.66 Sect/Pc #: 5/PCE 4
ROCK = DIABASE;
Texture: FINE-GRAINED*
Leg : 34 Top/Bottom Interval(mm): 750/ 780 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 123.76 Sect/Pc #: 5/PCE 5
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PHYRIC,INTERGRANULAR,QUENCHED
GROUNDMASS;
Phenocrysts- PLAGIOCLASE
MINOR;
OLIVINE
ALTERED, MINOR REMNANTS*
Groundmass - PLAGIOCLASE
POORLY DEVELOPED IN CONTRAST TO THE COARSER
OVERLYING PIECES;
OLIVINE
ABUNDANT, ALTERED;
ILMENITE
Morphology: SKELETAL
ID UNCERTAIN*
Alteration - SMECTITE
Location: AMYGDULES Replacing: GROUNDMASS OL
CALCITE
ONE RHOMB*
Vesicles -
Filling: SMECTITE
Leg : 34 Top/Bottom Interval(mm): 750/ 780 Describer: Vallier, T.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 123.76 Sect/Pc #: 5/PCE 5
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,HOLOCRYSTALLINE,
INTERGRANULAR,SUBOPHITIC
GRAINS ARE COARSER NEAR THE BASE OF THE SLIDE*
Phenocrysts- PLAGIOCLASE ( 5.4%)
Size(mm): TO 1.2
TO 1.2 MM IN DIAMETER,SOME LARGER PHENOS CONTAIN
XTLS OF EUHEDRAL CPX,RARE ZONING,RARE ALTERATION
TO CALCITE;
OLIVINE
Size(mm): TO 0.7
PSEUDOMORPHED BY SMEC*
Groundmass - PLAGIOCLASE ( 51.6%)
Size(mm): 0.25-0.4
RARE ZONING,RARE ALTERATION TO CALCITE,APPROX COMP
AN60 BY MICHEL-LEVY METHOD;
CLINOPYROXENE ( 25.7%)
Size(mm): 0.2-0.3 Morphology: EUHEDRAL
AUGITE,SOME LARGER PLAG PHENOS CONTAIN XTLS OF
EUHEDRAL CPX,LIGHT YELLOW GRAY,SIMPLE TWINNING,
NO ALTERATION,2V +50,EXTINCTION ANGLE Z-C 48-50
(SOME BIRDSEYE EXTINCTION),GRANULAR;
OLIVINE ( 6.6%)
Size(mm): 0.2-0.3
PERCENTAGE IS TOTAL OL (PHENOS + GROUNDMAS),
PSEUDOMORPHED BY SMEC;
OPAQUE MINERALS ( 5.4%)
GRANULAR,PROBABLY TI-MAGN;
MESOSTASIS ( 5.1%)
GLASSY,REPLACED BY SMEC,PERCENTAGES ARE OBTAINED
BY POINT COUNT*
Alteration - SMECTITE
Location: VESICLES Replacing: OL,MESOSTASIS
ABUNDANT,REPLACES OL + MESOSTASIS;
CALCITE ( 0.1%)
Location: VESICLES Replacing: PLAG
Vesicles -
Size(mm): TO 0.6
Filling: SMEC,CALCITE
RARE MICROVESICLES FILLED WITH SMEC + RARE
CALCITE*
Leg : 34 Top/Bottom Interval(mm): 900/ 920 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 123.91 Sect/Pc #: 5/PCE 7
ROCK = BASALT;
Texture: FINE-GRAINED, INTERGRANULAR;
Phenocrysts- OLIVINE
ALTERED TO BROWN AND GREEN SMECTITE*
Groundmass - OLIVINE
ABUNDANT, ALTERED;
PLAGIOCLASE
Morphology: SKELETAL
SMALL AMOUNT;
ILMENITE
ID UNCERTAIN, SMALL AMOUNT*
Alteration - SMECTITE
Location: GROUNDMASS Replacing: OL
GROUNDMASS ALMOST WHOLLY SMECTITE, RARELY
GREEN MOSTLY LIGHT BROWN*
Leg : 34 Top/Bottom Interval(mm): 980/1030 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 124.01 Sect/Pc #: 5/PCE 9
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PHYRIC,QUENCHED, FINELY "WHEAT-SHEAVED" AND
Piece #: OSE;
Phenocrysts- PLAGIOCLASE
LARGE, NUMEROUS;
OLIVINE
LARGE, FEW IN NUMBER, REPLACED BY SMEC AND
CALCITE,PLUCKED FROM SECTION*
Groundmass - OLIVINE
ALTERED*
Alteration - SMECTITE
Replacing: OL
AMBER OR YELLOW-BROWN;
CALCITE
Location: PHENOS Replacing: OL
Leg : 34 Top/Bottom Interval(mm): 1030/1040 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 124.04 Sect/Pc #: 5/PCE 9
ROCK = PLAG-OL PHYRIC BASALT
VERY SIMILAR TO 3-5,98-103;
Texture: INTERGRANULAR
AT ONE END OF SECTION FINE INTERGRANULAR-
WHICH SHOULD BE A CLUE AS TO WHICH WAY IS UP
IN PCE 9;
Phenocrysts- OLIVINE
Alteration - CALCITE ( 0%)
NO CALCITE AFTER OL PHENOS*
Leg : 34 Top/Bottom Interval(mm): 1040/ 0 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 124.04 Sect/Pc #: 5/PCE 10
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: COARSE-GRAINED, INTERGRANULAR,MODERATELY
MICROPHYRIC
ABRUPT CHANGE ALONG ONE EDGE TO FINE-GRAINED
VARIOLITIC TO INTERGRANULAR - BOUNDARY
IRREGULAR IN DETAIL;
Phenocrysts- PLAGIOCLASE
OLIVINE
Morphology: PSEUDOMORPHS
Alteration - SMECTITE
Replacing: OL
BROWN SMEC*
Leg : 34 Top/Bottom Interval(mm): 1150/1180 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 124.17 Sect/Pc #: 5/PCE 12
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: INTERGRANULAR TO VARIOLITIC
SLIGHTLY COARSER THAN THE FINER-GRAINED
PART OF T.S. 104-107 (PCE 10),
LOCALLY PILOTAXITIC;
Phenocrysts- PLAGIOCLASE
MINOR PLAG MICROPHENOS*
SOME VESICLES PARTLY FILLED WITH VERY
FINE-GRAINED BASALT*
Leg : 34 Top/Bottom Interval(mm): 1230/1240 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 124.24 Sect/Pc #: 5/PCE 13
ROCK = PLAG MICROPHYRIC BASALT
LIKE PCE 12, 115-118;
Texture: PILOTAXITIC, MICROPHYRIC;
Phenocrysts- PLAGIOCLASE
OLIVINE
Morphology: PSEUDOMORPH
ONLY ONE*
Alteration - SMECTITE
Replacing: OL
VERY FINE-GRAINED BASALT IN VESICLES*
Leg : 34 Top/Bottom Interval(mm): 430/ 480 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 124.96 Sect/Pc #: 6/PCE 2
ROCK = OL-PLAG PHYRIC BASALT;
Texture: VERY FINE-GRAINED, INTERGRANULAR TO
SUBOPHITIC, GLOMEROCRYSTS,MINOR QUENCHED
GROUNDMASS AS IN 10 METER UNIT ABOVE;
Phenocrysts- PLAGIOCLASE
OLIVINE
PLAG AND OL PHENOS AND GLOMEROCRYSTS*
Groundmass - PLAGIOCLASE
Morphology: SKELETAL
OPAQUE MINERALS
Morphology: SKELETAL
Alteration - SMECTITE
CALCITE ( TR%)
AMPHIBOLE
WELL-DEVELOPED FIBROUS AMPH(?) LOCALLY*
Leg : 34 Top/Bottom Interval(mm): 1150/1160 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 125.66 Sect/Pc #: 6/PCE 11
ROCK = PLAG PHYRIC BASALT;
Texture: FINE-GRAINED TO SUBOPHITIC,MINOR PLAG
Piece #: OS;
Phenocrysts- PLAGIOCLASE
Groundmass - OLIVINE
MINOR*
Alteration - CARBONATE ( TR%)
SMECTITE
Replacing: OL
COARSE, STRONGLY PLEOCHROIC COMPARED TO MOST
BASS HAS SEEN IN 319A - BUT SECTION IS REALLY
THICK*
Vesicles -
Filling: SMEC
Shape: ROUND
Leg : 34 Top/Bottom Interval(mm): 1450/1470 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 125.96 Sect/Pc #: 6/PCE 15
ROCK = PLAG-OL PHYRIC DIABASE
OR VERY COARSE GRAINED BASALT;
Texture: PHYRIC,FINE GRAINED(IF DIABASE)*
Phenocrysts- PLAGIOCLASE
OLIVINE
MUCH FRESH,FINELY XTLLINE OVOID INCLUSIONS IN OL
PHENOS EXIST*
Leg : 34 Top/Bottom Interval(mm): 1460/1470 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 117.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 125.97 Sect/Pc #: 6/PCE 14
ROCK = PLAG PHYRIC BASALT;
Texture: SUBOPHITIC COARSE BASALT OR FINE-GRAINED
DIABASE;
Phenocrysts- PLAGIOCLASE
MINOR,CORE OF 5.5X2.5MM PHENO:
X': 1.5657-1.570 (AN71-80),MAINLY
1.5666-1.5688 (AN73-78),
Z'(010): 1.5707-1.5768
(AN72-82);
OLIVINE ( 0%)
Groundmass - OLIVINE
MUCH OL BUT REPLACED EXCEPT FOR RARE
REMNANTS*
Alteration - CARBONATE ( TR%)
Location: GROUNDMASS
MAY BE SIDERITE (HI R.I.)*
Leg : 34 Top/Bottom Interval(mm): 1290/1320 Describer: Donaldson, C.H.
Hole: 319A Top of Core Depth(m) : 126.50 Rock Type: IGNEOUS
Core: 4 Sample Midpoint(m) : 127.81 Sect/Pc #: 1/PCE 8
ROCK = OL-PLAG BASALT
SOURCE IS IR;
Texture: FINE-GRAINED,OPHITIC,INTERGRANULAR,INTERSERTAL*
Phenocrysts- OLIVINE
Size(mm): <3
CORE TO RIM APPROX COMP FO88-79;
PLAGIOCLASE
Size(mm): <1.3
APPROX COMP AN80.5-77.9*
Groundmass - OLIVINE
Morphology: GLOMEROCRYSTS
APPROX COMP FO81.3,SMALL GRAINS SCATTERED THROUGH
MATRIX;
PLAGIOCLASE
Morphology: GLOMEROCRYSTS
CORE TO RIM APPROX COMP AN65.8-34.2;
AUGITE
APPROX COMP CA44.2-29.4*
Leg : 34 Top/Bottom Interval(mm): 200/ 220 Describer: Bunch, T.
Hole: 319A Top of Core Depth(m) : 128.50 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 128.71 Sect/Pc #: 1/PCE 1
ROCK = PLAG SPARSELY PHYRIC DIABASE
SOURCE IS IR;
Texture: FINE-GRAINED,GLOMEROPORPHYRITIC,SUBOPHITIC
INTERGRANULAR-VARIOLITIC,HYALOOPHITIC,SPARSELY
Piece #: IC*
Phenocrysts- PLAGIOCLASE
Size(mm): >2
APPROX COMP AN81-67(DOWN TO AN19 AT RIMS)*
Groundmass - OLIVINE
LARGE SMECS AFTER OL;
PLAGIOCLASE ( 42%)
Size(mm): .1-1.3 Morphology: LATHS
GLOMEROCRYSTS FROM .6-1.2MM,GROUNDMASS FROM .03-
.1MM;
PYROXENE ( 45%)
Morphology: SHEAF+FAN-LIKE
MICROPHENOS ARE .07-.15MM,INCLUDED IN PLAG
GLOMEROCRYSTS;
TITANOMAGNETITE ( 3%)
Size(mm): .005-.3 Morphology: SKELETAL-ROD SHAPED
GRANULAR;
OTHER ( 6%)
INTERSTITIAL MATERIAL*
Alteration - SMECTITE
Location: VEINS,OL Replacing: OL
GREEN+BLUE GREEN;
SULFIDE
CARBONATE
INCLUDES ARAGONITE+POSSIBLY CALCITE*
Leg : 34 Top/Bottom Interval(mm): 760/ 790 Describer: Donaldson, C.H.
Hole: 319A Top of Core Depth(m) : 128.50 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 129.28 Sect/Pc #: 1/PCE 8
ROCK = OL-PLAG BASALT
SOURCE IS IR;
Texture: FINE-GRAINED
SIMILAR TO 319A-4-1-129-132*
Phenocrysts- OLIVINE
CORE TO RIM APPROX COMP FO83.5-80.5;
PLAGIOCLASE
APPROX COMP AN86.7-74.6*
Groundmass - OLIVINE
APPROX COMP FO81.1;
PLAGIOCLASE
CORE TO RIM APPROX COMP AN63.3-39.2
AUGITE
APPROX COMP CA41.2-36.2*
Leg : 34 Top/Bottom Interval(mm): 700/ 710 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 138.00 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 138.71 Sect/Pc #: 1/PCE 1
ROCK = CPX-PLAG-OL PHYRIC BASALT;
Texture: FINELY VARIOLITIC,FINELY PLUMOSE*
Phenocrysts- PLAGIOCLASE
2V APPROX 85 DEGREES;
CLINOPYROXENE
OLIVINE
Morphology: SKELETAL
GRADES INTO GROUNDMASS,2V UNCERTAIN,APPROX COMP
FO85*
Groundmass - OLIVINE
PHENOCRYSTIC OL GRADES INTO GROUNDMASS-QUENCH OL*
Leg : 34 Top/Bottom Interval(mm): 840/ 890 Describer: Donaldson, C.H.
Hole: 319A Top of Core Depth(m) : 138.00 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 138.87 Sect/Pc #: 1/PCE 8
ROCK = PYX-PLAG PHYRIC BASALT
SOURCE IS IR;
Texture: PHYRIC,FINE-GRAINED*
Phenocrysts- PLAGIOCLASE
Size(mm): 3X1
APPROX COMP AN82.1-70.6
AUGITE
Size(mm): .3 Morphology: GLOMEROCRYSTS
APPROX COMP CA41.5*
Groundmass - PLAGIOCLASE
Morphology: FELTED LATHS-GLOMEROCRYSTS
CORE TO RIM APPROX COMP AN63.3-60.0;
AUGITE
TOO SMALL FOR ANALYSIS;
OTHER
CRYPTOCRYSTALLINE MATERIAL+ALTERED GLASS*
Leg : 34 Top/Bottom Interval(mm): 930/ 980 Describer: Bunch, T.
Hole: 319A Top of Core Depth(m) : 138.00 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 138.96 Sect/Pc #: 1/PCE 4
ROCK = PLAG-OL-CPX SPARSELY PHYRIC BASALT
SOURCE IS IR;
Texture: GLASSY(PALAGONITIZED),SPARSELY PHYRIC,
Piece #: TAXITIC*
Phenocrysts- PLAGIOCLASE
Size(mm): .3-1.2 Morphology: EUHEDRAL-SUBHEDRAL
ZONED,APPROX COMP CORES AN89-RIMS AN50;
CLINOPYROXENE
INCLUDES AUGITE(.3-.6MM)*
Groundmass - PYROXENE
Size(mm): .03-.7
RARE,SMALL;
PLAGIOCLASE ( 37%)
Morphology: LATHS-PINS
SLIGHTLY ZONED-APPROX COMP AN57-52;
OLIVINE
Morphology: EUHEDRAL
FRESH+ALTERED;
OPAQUE MINERALS
Size(mm): <.02
TI-MAGN,RARE,GRANULES IN GLASS;
OTHER ( 40%)
FINE-GRAINED INTERSTITIAL MATERIAL*
Alteration - SMECTITE
Replacing: OL
GREEN,BLUE;
FERROUS OXIDE
Replacing: OL
RED*
Leg : 34 Top/Bottom Interval(mm): 1000/1060 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 138.00 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 139.03 Sect/Pc #: 1/PCE 5
ROCK = BASALT;
Texture: FINE-GRAINED,VARIOLITIC-INTERGRANULAR
SAME AS 6-1-130-131*
Leg : 34 Top/Bottom Interval(mm): 1300/1310 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 138.00 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 139.31 Sect/Pc #: 1/PCE 9
ROCK = CPX-PLAG PHYRIC BASALT;
Texture: FINE-GRAINED,VARIOLITIC-INTERGRANULAR,PHYRIC
COARSER THAN 7-1-PIECE 1*
Phenocrysts- CLINOPYROXENE
PLAGIOCLASE
Leg : 34 Top/Bottom Interval(mm): 180/ 200 Describer: Bass, M.
Hole: 319A Top of Core Depth(m) : 147.50 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 147.69 Sect/Pc #: 1/PCE 1
ROCK = PLAG-OL PHYRIC BASALT;
Texture: FINE-GRAINED,VARIOLITIC
VISIBLE GRANULARITY,COARSER THAN 6-1-70-71-1*
Phenocrysts- PLAGIOCLASE
OLIVINE
ALMOST ALL OL PHENOS ALTERED TO SMECTITE-ONE IS A
SINGLE LARGE PLEOCHROIC XTL*
Leg : 34 Top/Bottom Interval(mm): 1190/1220 Describer: Donaldson, C.H.
Hole: 319A Top of Core Depth(m) : 147.50 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 148.71 Sect/Pc #: 1/PCE 16
ROCK = OL-PLAG PHYRIC BASALT
SOURCE IS IR;
Texture: PHYRIC,FINE-GRAINED
SIMILAR TO 319A-5-1-76-79*
Phenocrysts- OLIVINE
CORE TO RIM APPROX COMP FO84.0-81.5;
PLAGIOCLASE
APPROX COMP AN78.8-73.2*
Groundmass - OLIVINE
APPROX COMP FO83.0;
PLAGIOCLASE
CORE TO RIM APPROX COMP AN69.1-39.6;
AUGITE
APPROX COMP CA42*
Leg : 34 Top/Bottom Interval(mm): 1210/1240 Describer: Bunch, T.
Hole: 319A Top of Core Depth(m) : 147.50 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 148.72 Sect/Pc #: 1/PCE 17
ROCK = OL-PLAG SPARSELY PHYRIC BASALT
SOURCE IS IR;
Texture: VERY COARSE-GRAINED,SPARSELY PHYRIC,
SUBVARIOLITIC*
Phenocrysts- OLIVINE
Size(mm): >2
PARTLY ALTERED TO SMEC;
PLAGIOCLASE
Size(mm): 1
APPROX COMP AN68*
Groundmass - PYROXENE
Morphology: GRANULAR-SOME SHEAF
VERY SMALL MICROPHENOS;
PLAGIOCLASE
APPROX COMP AN80-66*
Alteration - SMECTITE
Location: VEINS,OL Replacing: OL
GREEN,BLUE-GREEN;
FERROUS OXIDE
Location: VEINS
CALCITE
Location: VEINS
ARAGONITE
Location: VEINS
OTHER
Location: VEINS
PHILLIPSITE?,VEIN FILLING MATERIAL IS YELLOW,RED,
RED-BROWN,BROWN,ORANGE-BROWN,BLUE,GREENISH-YELLOW,
GREEN AND BLUE-GREEN MATERIAL*
RARE*
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