Leg : 73 Top/Bottom Interval(mm): 1220/ 0 Describer: Carman, M.
Hole: 522B Top of Core Depth(m) : 148.90 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 151.62 Sect/Pc #: 2/PCE 2B
ROCK = PLAG-CPX-OL MODERATELY MICROPHYRIC BASALT;
Texture: MICROPHYRIC,ELONGATE,PARTIAL SPHERULITIC,PLUMOSE
DENDRITIC;
Where sampled: PILLOW INTERIOR NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE (0.5-1%)
Size(mm): .10-.30 Morphology: ANHEDRAL,SKELETAL
2VX=85,APPROX COMP FO75-80,POSSIBLY RESORBED,
HOLLOW INTERGROWN WITH PLAG PHENOS;
PLAGIOCLASE ( 5%)
Size(mm): .15-.80 Morphology: EUHEDRAL
2V=90,APPROX COMP AN70-80,ELONGATE INTERGROWN
WITH OL MICROPHENOS,SODIC RIMS,SIMPLE INTERNAL
COMPLETE ZONING;
CLINOPYROXENE ( 1%)
Size(mm): .15-.25 Morphology: ANHEDRAL
FINELY INTERGROWN WITH 2ND GEN. ELONGATE PLAG
PHENOS, 1ST GEN. PLAG:SOLID CLEAR STUBBY XTLS IN
CLUSTERS-SIMPLY TWINNED AND SLIGHTLY ZONED*
Groundmass - PLAGIOCLASE (20-30%)
Size(mm): .04-.6 Morphology: HOLLOW BOX,SWALLOWTAIL,
Morphology: TAPERED
TYPICAL ELONGATE;
CLINOPYROXENE (30-40%)
Size(mm): .05-.30 Morphology: DENDRITIC PLUMOSE
SIZE IS FOR UNIT,W=.001-.004,L=.01-.04,MOST
NUCLEUS OF PLAG MICROPHENOS OR LARGE ELONGATE GM
PLAG,SOME LENGTH FAST,MOST LENGTH SLOW;
OPAQUE MINERALS (10-15%)
Size(mm): .001-.02 Morphology: INTERSTIT. BETWEEN DENDRITES
Morphology: AND SPHERULITIC BOUNDARIES
INCLUDES MAGN + ILMENITE;
GLASS ( <1%)
PALE YELLOW;
OTHER (20-30%)
SPHERULITES,
ID UNCERTAIN FOR AUGITE,SOME LENGTH FAST,MOST
LENGTH SLOW*
Alteration - CARBONATE ( 3-4%)
Location: VESICLES AND Replacing: OL
Location: SCATTERED
ID UNCERTAIN FOR OL*
Vesicles -
Size(mm): .08-1.30
Percent: 2-3
Location: THROUGHOUT
Filling: CALCITE
Shape: ROUND
Leg : 73 Top/Bottom Interval(mm): 300/ 0 Describer: Carman, M.
Hole: 522B Top of Core Depth(m) : 148.90 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 152.20 Sect/Pc #: 3/PCE 1C
ROCK = PLAG-OL-CPX MICROPHYRIC BASALT
VERY SIMILAR TO 3-2-2B BUT SLIGHTLY COARSER;
Texture: MICROPHYRIC,ELONGATE,SPHERULITIC,PLUMOSE,
DENDRITIC;
Where sampled: PILLOW INTERIOR NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 0.03-0.5 Morphology: SKELETAL,EUHEDRAL,HOLLOW
COMPLETELY ALT.,SUBOPHITIC-INTERGROWN WITH PLAG;
PLAGIOCLASE ( 5-8%)
Size(mm): 0.12-1.0 Morphology: THICK TABULAR,EUHEDRAL
2VZ=85,APPROX COMP AN72+,ZONED WITH SODIC RIMS,
MANY CENTRAL CORE INCLUSIONS OF AUGITE OR OL,
LENGTH/WIDTH=1/3-1/10,REFR.INDEX >1.55-1.56;
CLINOPYROXENE ( 1%)
Size(mm): 0.01-0.25
SUBOPHITIC INTERGROWN WITH PLAG,PHENOS
INTERSPERSED,OL+PLAG+CPX XTLLIZED EARLY*
Groundmass - PLAGIOCLASE (30-40%)
Size(mm): 0.05-1.0 Morphology: ELONGATE,SWALLOW-TAILS,
Morphology: HOLLOW,TAPERED
0.9 MM L/W=1/13:APPROX COMP AN63 BY CARLSBAD-AB,
0.6 MM ZONED:APPROX COMP AN64-60 BY CARLSBAD-AB,
R.I.> 1.55-1.56;
CLINOPYROXENE (40-50%)
Size(mm): 0.10-0.17 Morphology: PLUMOSE,DENDRITIC,SPHERULITIC
Morphology: SHEAVES
W=.002-.01,L=.01-.09,SHEAVES .1-.2MM LONG,
COMBINED WITH PLUMOSE DENDRITES-CHAIN LINK
(.1-.3 UNITS);
OPAQUE MINERALS ( 10%)
Size(mm): .002-0.008 Morphology: CUBES,OCTAHEDRA, PLATES
INCLUDES MAGN+ILMENITE,INTERSTITIAL ONLY,PRESENCE
OF OCTAHEDRA AND PLATES UNCERTAIN (SPARSE);
OTHER (10-20%)
Morphology: SHEAVES
SPHERULES COMPOSED OF CPX(AUGITE),SEE CPX ABOVE*
Alteration - CLAY MINERALS ( 5%)
Location: INTERSTITIAL Replacing: OL MICROPHENOS
INCLUDES SMEC*
Vesicles -
Size(mm): 0.2-0.65
Percent: <1
Filling: SMEC
Shape: ROUND
SOME FILLED,SOME ONLY LINED,SMEC IS YLW-BROWN*
Leg : 73 Top/Bottom Interval(mm): 770/ 0 Describer: Carman, M.
Hole: 522B Top of Core Depth(m) : 148.90 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 152.67 Sect/Pc #: 3/PCE 2D
ROCK = PLAG-OL-CPX MICROPHYRIC BASALT;
Texture: GLASSY,MICROPHYRIC,SPHERULITIC,ELONGATE,PLUMOSE,
DENDRITIC;
Where sampled: GLASSY MARGIN*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 0.05-1.2 Morphology: EUHEDRAL SKELETONS
2V=90-APPROX COMP FO85,2VZ85-APPROX COMP FO80,
OPHITIC INTERGROWN WITH PLAG,ALT. IN XTLINE PART;
PLAGIOCLASE ( 5-8%)
Size(mm): 0.12-1.44 Morphology: EUHEDRAL,STUBBY,TABULAR
2V=90,APPROX COMP AN80-90,L/W=1/1-1/4 NO ELONGATE
SPINES,
TWO GENERAL TYPES PLAG;
PLAGIOCLASE
Size(mm): 0.03-1.2
2 GENERATIONS:1=CLUSTER EUHED,2=SCATTERED SKELS,
APPROX COMP AN66-42 CORE-THIN RIM AN65-55 CORE-
THIN RIM,AN65 CORE ALL BY CARLSBAD-ALBITE,L/W=1/3-
1/17,AB-CB TWINNING,MOST WITH ELONGATE SPINES;
CLINOPYROXENE ( <1%)
Size(mm): 0.16 Morphology: ANHEDRAL
SUBOPHITICALLY INTERGROWN WITH GENERATION 2 PLAG
MICROPHENOS IN ANHEDRAL GRAINS,
CPX+PLAG+OL XTLIZED EARLY, PLAG,OL FIRST*
Groundmass - PLAGIOCLASE ( 3-25%)
Size(mm): .02-.20 Morphology: ELONGATE,SWALLOW-TAIL,
Morphology: HOLLOW,SHEAVES,TAPERED
5 TEX ZONES IN GM,CF 3-3-140 PCE 4C,
TWO GENERAL TYPES PLAG;
PLAGIOCLASE
Size(mm): .05-.40
SPHER. ZONE=3%,1.9 CM FROM SPHER. ZONE=25%,
R.I. > ARALDITE,L/W=1/9 TO 1/30, COARSER AND
ABUNDANT AWAY FROM GLASS;
CLINOPYROXENE (50-60%)
Size(mm): .1-.2 Morphology: PLUMOSE DENDRITES
SIZE RANGE GIVEN FOR PLUME UNITS,FOR FIBERS IS
.002X.0005(MEASURED IN ZONE 5);
OPAQUE MINERALS ( 5-10%)
Size(mm): .001-.008 Morphology: CUBES
CONCENTRIC IN INTERSTITIAL SPACE BETWEEN SPHERULES
AND CPX DENDRITES,INCLUDES MAGN+ILMENITE;
GLASS
7MM RIND IN THE SECTION,
CLEAR PALE BROWN,GLASS AND SPHR. ZONE 2=1MM THICK,
SHEAF SPHR. AND FINE DENDRITIC ZONE 4=11.7 MM
THICK, PLUMOSE DENDRITIC AND PARTIAL SPHER ZONE 5=
4 MM THICK;
OTHER
Morphology: DENDRITIC STRINGS,ELLIPSES,
Morphology: BOWTIE SHEAVES
FINE DENDRITES:5% OF GLASS,STRINGS OF GLOBULITES?
OCCUR ALONG BOUNDARIES OF 1)CRACKS W/ALT TO PALAG,
2)VESICLES 3)SPHERULITES 4)MICROPHENOS,CF 3-3-
140-PCE 4C FOR ZONES OF SPHERULITES
ALSO INCLUDES BROWN SPHERULES:85-90% IN SPHERULE
ZONE, 30% 1.9CM FROM SPHERULE ZONE,ALL LENGTHS
SLOW*
Alteration - CLAY MINERALS
Location: XTLINE PART Replacing: OL
Location: OF ROCK
BROWN SMECTITE*
Vesicles -
Size(mm): 0.1-1.3
Percent: 1-2
Location: THROUGHOUT
Filling: SMEC,CHLORITE
Shape: ROUND
Shape: ROUND-
Shape: IRREGULAR
MOST FILLED,SOME ONLY LINED,LARGEST IN GLASS,
FILLING ALSO INCLUDES CLEAR HIGH RELIEF
ISOTROPIC SUBSTANCE*
Leg : 73 Top/Bottom Interval(mm): 900/ 0 Describer: Carman, M.
Hole: 522B Top of Core Depth(m) : 148.90 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 152.80 Sect/Pc #: 3/PCE 3B
ROCK = PLAG-OL-CPX MICROPHYRIC BASALT;
Texture: MICROPHYRIC,ELONGATE,SPHERULITIC,PLUMOSE
DENDRITIC
CF 3-3-77-2D,TEX ZONE 5;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
ID UNCERTAIN FOR OL;
PLAGIOCLASE ( <1%)
TWO GENERAL TYPES PLAG;
PLAGIOCLASE ( 5-10%)
SECOND GENERATION PHENO, APPROX COMP AN63-55 BY
CARLSBAD-AB;
CLINOPYROXENE ( <1%)
Groundmass - CLINOPYROXENE
Size(mm): .05-.25
SIZE GIVEN FOR UNIT,L=.005-.10,W=.001-.003*
Alteration - CLAY MINERALS
Replacing: OL
INCLUDES SMEC*
Vesicles -
Size(mm): .05-1.2
Percent: 1-2
Location: THROUGHOUT
Filling: SMEC
Shape: ROUND
Shape: ROUND-
Shape: IRREGULAR
ALSO FILLED W/ CLEAR HIGH RELIEF AMORPHOUS
MATERIAL,SEGREGATION VESICLES FILLED W/ VERY FINE
GRAINED CPX AND OPAQUES W/ PLAG MICROLITES
ARRANGED TANGENTIALLY (SEE 3-3-136-4B)*
Leg : 73 Top/Bottom Interval(mm): 1180/ 0 Describer: Carman, M.
Hole: 522B Top of Core Depth(m) : 148.90 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 153.08 Sect/Pc #: 3/PCE 4A
ROCK = PLAG-OL MICROPHYRIC BASALT;
Texture: GLASSY,MICROPHYRIC,ELONGATE,SPHERULITIC,PLUMOSE
DENDRITIC
TEX ZONES ARE 1= 9.1MM YELLOW-TAN GLASS WITH
MICROPHENOS SCATTERED,2=1.6MM SPHR.+GLASS,3= 2.3MM
SOLID COALESCED SPHR.,4= 2.0MM SOLID SPHR. WITH
FINE DENDRITIC CENTERS,5=DENDRITIC CPX BETWEEN
AND AROUND PARTIAL SPHR.*
CF 3-3-77-2D AND 3-3-90-3B;
Where sampled: GLASSY MARGIN*
Phenocrysts- OLIVINE ( 5-10%)
2VX=88,APPROX COMP FO80,LARGE GRAIN IN GLASS WITH
GLASS INCLUSIVE;
PLAGIOCLASE
2VZ=85+, APPROX COMP AN70-80*
Groundmass - CLINOPYROXENE
Size(mm): .03-.25
SIZE IS FOR UNIT,W=.001-.015,L=.01-.10,MEASURED
3.3 CM FROM ZONE 2*
Alteration - CLAY MINERALS
Replacing: OL
INCLUDES SMEC*
Leg : 73 Top/Bottom Interval(mm): 1360/ 0 Describer: Carman, M.
Hole: 522B Top of Core Depth(m) : 148.90 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 153.26 Sect/Pc #: 3/PCE 4B
ROCK = PLAG-OL-CPX MICROPHYRIC BASALT;
Texture: MICROPHYRIC,ELONGATE,SPHERULITIC,PLUMOSE
DENDRITIC
CF 3-3-30-1C,EXCEPT FOR VESICLES;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE
CF 3-3-30-1C EXCEPT LESS OL HERE;
PLAGIOCLASE
CF 3-3-30-3C,APPROX COMP AN61 BY CALRSBAD-AB,2VZ=
88,APPROX COMP AN70+,2B
88,APPROX COMP AN70+,2VZ=85+,R.I.>1.55-1.56;
CLINOPYROXENE
2VZ=60,CPS+PLAG+OL XTLIZED EARLY*
Groundmass - OLIVINE
CF 3-3-30-1C;
PLAGIOCLASE
R.I.>1.55-1.56;
CLINOPYROXENE
Size(mm): .05-.20
SIZE IS FOR UNIT,W=.001-.008,L=.01-.10*
Vesicles -
Size(mm): .03-1.0
Percent: 1
Filling: SMEC,CALCITE,
Shape: ROUND +
Filling: CPX,OP.MINS
Shape: IRREGULAR
SEGREGATION VESICLES FILLED WITH VERY FINE-GRAINED
CPX AND OPAQUES W/ PLAG MICROLITES ARRANGED
TANGENTIALLY*
Leg : 73 Top/Bottom Interval(mm): 1400/ 0 Describer: Carman, M.
Hole: 522B Top of Core Depth(m) : 148.90 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 153.30 Sect/Pc #: 3/PCE 4C
ROCK = PLAG-OL-CPX MICROPHYRIC BASALT;
Texture: GLASSY,MICROPORPHYRITIC,SPHERULITIC,ELONGATE,
FINELY PLUMOSE DENDRITIC;
Where sampled: GLASSY MARGIN*
Phenocrysts- OLIVINE ( 3-5%)
Size(mm): .95 Morphology: ANHEDRAL-EUHEDRAL,SKELETAL
2VX=85+,APPROX COMP FO70-80,SEPARATE AND
INTERGROWN WITH PLAG IN GLASS,SLIGHTLY ALT. TO
SMEC,FRESH IN GLASS,ALMOST COMPLETELY ALT. IN
XTLLINE;
PLAGIOCLASE ( 10%)
Size(mm): .02-1.0 Morphology: TABULAR,SKELETAL TO ELONGATE,
Morphology: SWALLOWTAIL
R.I.>ARALDITE,SEPARATE AND INTERGROWN WITH OL+CPX
IN GLS,L/W=1/3-1/17;
CLINOPYROXENE ( <1%)
Size(mm): 0.25 Morphology: ANHEDRAL,BOW-TIE SECTOR ZONED
2VZ=60,INTERGROWN WITH PLAG IN GLS,OL+CPX+PLAG
ALL IN GLOMEROPORPHYRITIC CLUSTERS WITH PLAG
TENDING TO RADIAL ORIENTATION,ALL 3 XTLIZED EARLY;
PLAGIOCLASE ( <1%)
Size(mm): .1-1.6 Morphology: SOLID EUHEDRAL
THIS IS THE EARLIEST PLAG,APPROX COMP AN80-60 BY
CARLSBAD-AB,ZONED,SODIC RIMMED,L/W=1/3-1/6,
GLOMEROPORPHYRITIC CLUSTERS WITH NO CPX OR OL*
Groundmass - OLIVINE
GM SEQUENCE=1:GLASS,SPHR MANTLE ON XTLS ESP. PLAG,
ZONE IS 1.2MM WIDE, 2:ZONE IS .05 TO 0.5MM WIDE,
SPHERULITIC WITH XTL CORE+GLS MATRIX,3: 2.3
MM,SPHR COALESCE AND COARSER,NO GLS,FINE DENDRITIC
PATTERN EMERGING,4:11MM, SHEAFS,SPHR,LENGTH SLOW,
FINELY DENDRITIC,5:1.5 CM,SAME AS 4 BUT WELL-DEV.
PLUMOSE DENDRITIC CPX;
PLAGIOCLASE (15-20%)
Size(mm): .02-.35 Morphology: ELONGATE,SW.TAIL,TAPERED,
Morphology: FIBROUS SHEAVES
CLINOPYROXENE (25-30%)
Size(mm): .1-.25 Morphology: FINE PLUMOSE DENDRITES
SIZE IS FOR UNIT,W=.001-.002,L=.04-.08;
OPAQUE MINERALS (10-15%)
Size(mm): .001-.002
INCLUDES MAGN+ILMENITE,INTERSTIT. BETWEEN SPHR;
GLASS
Size(mm): 11
CLEAR YELLOW BROWN, ALT.TO PALAGONITE ALONG
CRACKS;
OTHER
Size(mm): .002-.007 Morphology: DENDRITIC,ARBORESCENT
STRINGS OF GLOBULITES?
THIS MINERAL IS SUBMICROSCOPIC DENDRITES IN GLASS;
OTHER (80-90%)
Size(mm): .1-.3 Morphology: ELLIPTICAL+BOW-TIE SHEAVES
SPHERULES,
% IS FOR SPHR ZONE,1.5 CM FROM SPHR ZONE=30-40%,
LENGTH SLOW*
Alteration - CLAY MINERALS
Location: CRYSTALLINE Replacing: OL
Location: PARTS
INCLUDES SMEC*
Vesicles -
Size(mm): .03-1.1
Shape: ROUND+IRREG
Leg : 73 Top/Bottom Interval(mm): 430/ 0 Describer: Carman, M.
Hole: 522B Top of Core Depth(m) : 148.90 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 153.83 Sect/Pc #: 4/PCE 4
ROCK = PLAG-OL-CPX MICROPHYRIC BASALT
SIMILAR TO 3-3-77 (2D) ZONE 5 BUT GROUNDMASS AND
DENDRITIC CPX LESS ABUNDANT AND SPHERULITES MORE
COMMON;
Texture: MICROPHYRIC,ELONGATE,SPHERULITIC,PLUMOSE
DENDRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 2-4%)
Size(mm): 0.05-0.31
PLAGIOCLASE ( 5-8%)
Size(mm): 0.12-0.8
TWO GENERAL TYPES PLAG;
PLAGIOCLASE
Size(mm): 0.10-1.36
2V=90,APPROX COMP AN80-70,APPROX COMP AN64-60 BY
CARLSBAD-AB;
CLINOPYROXENE ( 1%)
Size(mm): 0.05-0.36
Groundmass - PLAGIOCLASE (15-20%)
Size(mm): 0.03-0.6
CLINOPYROXENE (25-30%)
Size(mm): 0.05-0.3 Morphology: DENDRITIC
W=.001-.01,L=.06-.10;
OPAQUE MINERALS (10-15%)
Size(mm): 0.002-.012
INCLUDES MAGN+ILMENITE;
OTHER (30-35%)
SPHERULES*
Alteration - CHLORITE
Replacing: OL
ID UNCERTAIN FOR CHLORITE;
SERPENTINITE
Replacing: OL
BIREFRINGENCE PERHAPS TOO LOW FOR SERPENTINITE,
COLORLESS;
Vesicles -
Percent: 1
Leg : 73 Top/Bottom Interval(mm): 50/ 0 Describer: Carman, M.
Hole: 522B Top of Core Depth(m) : 156.00 Rock Type: IGNEOUS
Core: 4 Sample Midpoint(m) : 156.05 Sect/Pc #: 1/PCE 1A
ROCK = APHYRIC BASALT
EXTENSIVELY ALTERED;
Texture: FINELY SERIATE,SUBOPHITIC,INTERGRANULAR,APHYRIC,
INTERSERTAL;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 5-10%)
Size(mm): .5-.1 Morphology: EUHEDRAL-ANHEDRAL
SUBOPHITIC AND OPHITIC INTERGROWN WITH PLAG;
PLAGIOCLASE (30-40%)
Size(mm): .1-1.3 Morphology: SUBHEDRAL-MANY HOLLOW
1.6 MM ANHED GRAIN POSSIBLE XENOCRYST,2V=90,APPROX
COMP AN80, APPROX COMP AN61-50 BY CARLSBAD-AB;
CLINOPYROXENE (30-40%)
Size(mm): .03-.4 Morphology: SUBHEDRAL-ANHEDRAL
2VZ=60,MOSTLY SUBOPHITIC OR INTERGRANULAR;
OPAQUE MINERALS (10-15%)
Size(mm): .005-.05
INCLUDES MAGN + ILMENITE;
ALTERED GLASS ( 5-10%)
IN INTESERTAL PATCHES WITH OP.MINS+CPX+PLAG*
Alteration - CLAY MINERALS
Location: INTERSERTAL Replacing: OL
INCLUDES SAPONITE POSSIBLY,OL HAS HIGH BIREFRING*
THREE GENERAL TYPES VESICLES;
Vesicles -
Size(mm): .2-.9
Percent: 1
Filling: GREEN SAPONITE
Shape: ROUND,
Shape: INTERSTITIAL
Size(mm): .3-1.1
Percent: 1
Filling: GREEN SAPONITE
Shape: DIKTYTAXIT
DIKTYTAXITIC;
Size(mm): .50-1.1
Percent: <1
Filling: CPX,OP.MINS,
Shape: ROUND
Filling: SAPONITE,PLAG
SEGREGATION TYPE,4 VESICLES FILLED W/ FINELY
GRANULAR CPX+OP.MINS+SAPONITE+RARER PLAG, VESICLE
PARTIALLY FILLED W/ THESE AND CENTRALLY FILLED W/
SAPONITE*
Leg : 73 Top/Bottom Interval(mm): 770/ 0 Describer: Carman, M.
Hole: 522B Top of Core Depth(m) : 156.00 Rock Type: IGNEOUS
Core: 4 Sample Midpoint(m) : 156.77 Sect/Pc #: 1/PCE 2
ROCK = APHYRIC BASALT
EXTENSIVELY ALTERED;
Texture: APHYRIC,MICROPHYRIC,ADVANCED SERIATE,ELONGATE
CLEARLY TRANSITIONAL BETWEEN SPHERULITIC-SPINIFEX
AND SUBOPHITIC,TEXTURE CONSISTS OF A NETWORK OF
SERIATE PLAG(W/ SPINIFEX ATTRIBUTES)+ OL + FINELY
SUBOPHITIC CPX W/ FINE INTERSITITIAL OPAQUES,
NETWORK IS SIEVE-LIKE-W/ "HALOS" RANGING FROM
ROUNDED SEGREGATION VESICLES TO HIGHLY IRREGULAR
PATCHES CONTAINING FINELY DENDRITIC CPX - SHEAVED
SPHERULITES + SPINIFEX PLAG W/ ABUNDANT OPAQUES
AND SPARSE SMECTITE BETWEEN THE SHEAVES (ALL MUCH
FINER GRAINED THAN THE NETWORK)
Where sampled: FLOW INTERIOR
12 CM BELOW TOP GLASSY MARGIN*
Groundmass - OLIVINE ( 3-4%)
Size(mm): .05-.5 Morphology: EUHEDRAL-SUBOPHITIC
PLAGIOCLASE (30-40%)
Size(mm): .01-.12 Morphology: SUBHEDRAL,ELONGATE,SW.TAIL,
Morphology: HOLLOW
2V=90,APPROX COMP AN80-70 ON LARGER GRAINS,L/W=1/4
-1/30;
CLINOPYROXENE (30-40%)
Size(mm): .01-.25 Morphology: PLUMOSE DENDRITIC GRADING
Morphology: INTO SUBOPH+INTERGRANULAR
2VZ=60;
OPAQUE MINERALS (10-15%)
Size(mm): .001-.02 Morphology: CUBES,PLATES
INCLUDES MAGN+ILMENITE,INTERSTIT. ALONG EDGES IN
SPHERULITIC PATCHES*
Alteration - SERPENTINITE
Replacing: OL
SERPENTINITE CORE,ORANGE SAPONITE RIMS*
THREE GENERAL TYPES VESICLES;
Vesicles -
Size(mm): .05-4.0
Percent: 2-3
Location: THROUGHOUT
Filling: CARBONATE
Shape: IRREGULAR
Size(mm): .02-1.08
Percent: 3-4
Location: THROUGHOUT
Filling: SMEC
Shape: IRREGULAR-
Shape: ROUNDED
Size(mm): .32-.9
Percent: <1
Location: THROUGHOUT
Filling: SPHERULES,
Filling: OP.MINS,
Filling: MINOR PLAG,SMEC
SEGREGATION TYPE,FILLING ALL VERY FINE-GRAINED,PL
OF NETWORK USUALLY TANGENTIAL*
Leg : 73 Top/Bottom Interval(mm): 40/ 0 Describer: Carman, M.
Hole: 522B Top of Core Depth(m) : 156.00 Rock Type: IGNEOUS
Core: 4 Sample Midpoint(m) : 157.54 Sect/Pc #: 2/PCE 1A
ROCK = APHYRIC BASALT
EXTENSIVELY ALTERED;
Texture: APHYRIC,MICROPHYRIC,SERIATE,ADVANCED ELONGATE,
INTERSERTAL
TRANSITION TO SUBOPHITIC INTERSERTAL
MORE ADVANCED THAN 4-1-77-2,TEXTURE IS A NETWORK
OF SERIATE PLAG LATHS W/EUHEDRAL AND SUBHEDRAL
OL + CPX PATCHES INTERSPERSED W/ ROUNDED TO
ELLIPSOIDAL CRUDELY RADIAL SHEAVES OF CPX + PLAG
FINELY INTERGROWN. THE INTERSTICES OF THE NETWORK
ARE HIGHLY IRREGULAR AND FILLED W/ ABUNDANT OPAQUE
"SPEARS" AND CRYPTOXLINE MATERIAL (INTERSERTA);
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 1-2%)
Size(mm): .15-2.0 Morphology: EUHEDRAL+SUBOPHITIC
COMPLETELY ALTERED;
PLAGIOCLASE (30-40%)
Size(mm): .04-1.2 Morphology: SUBHED-ELONGATE,HOLLOW,SPARSE
Morphology: SWALLOWTAILS
APP. COMP AN75-78 BY A-NORMAL METHOD,L/W=1/3-1/35;
CLINOPYROXENE (30-40%)
Size(mm): .001-.5 Morphology: SUBHEDRAL-ANHEDRAL
2VZ=60,SUBOPH.,INTERGRANULAR,CRUDE THICK PLUMOSE +
RADIAL SPHEAVES W/PLAG DERIVED OF SPHERULES IN
FINER TEXTURES;
OPAQUE MINERALS (10-15%)
Size(mm): .002-.03 Morphology: CUBES,OCTAHEDRA,PLATES
INCLUDES MAGN + ILMENITE,DEVITRIFIED ABOUT 10% AND
INTERSERTAL ABOUT 5%*
Alteration - CARBONATE ( <1%)
Replacing: OL
OL IN PART REPLACED;
CLAY MINERALS
Replacing: OL
INCLUDES SAPONITE POSSIBLY*
TWO GENERAL TYPES VESICLES;
Vesicles -
Size(mm): .4-.8
Percent: 2
Location: THROUGHOUT
Filling: CPX,OP.MINS
Shape: ROUND
SEGREGATION TYPE,FILLED AND PARTLY FILLED;
Size(mm): .08-1.0
Percent: 1-2
Location: THROUGHOUT
Filling: CALCITE,SMEC
Shape: ROUND
Shape: IRREGULAR
Leg : 73 Top/Bottom Interval(mm): 690/ 0 Describer: Carman, M.
Hole: 522B Top of Core Depth(m) : 156.00 Rock Type: IGNEOUS
Core: 4 Sample Midpoint(m) : 158.19 Sect/Pc #: 2/PCE 2
ROCK = PLAG-OL-CPX MICROPHYRIC BASALT;
EXTENSIVELY ALTERED
Texture: GLASSY,MICROPHYRIC,SPHERULITIC,ELONGATE,PLUMOSE
DENDRITIC, CF 3-3-77-2D,PHENOS ALL XTLLIZED
TOGETHER EARLY;
Where sampled: GLASSY MARGIN*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): .03-.4 Morphology: EUHEDRAL,SKELETAL
2V=90,APPROX COMP F085,2VX=85+,APPROX COMP
F075-80,INCLUDES SINGLE + INTERGROWN WITH PLAG,
COMPLETELY ALTERED IN THE XTLLINE ROCK;
PLAGIOCLASE (10-15%)
Size(mm): .02-1.6 Morphology: EUHEDRAL,SKELETAL
2VZ=85+,APPROX COMP AN70-80,L/W=1/7-1/30,
INTERGRN W/ CPX+OL IN GLOMEROPORPHYRITIC CLUSTERS;
CLINOPYROXENE ( 1-2%)
Size(mm): .005-0.3 Morphology: EUHEDRAL-ANHEDRAL
2VZ=60, SUBOPHITICALLY INTERGROWN WITH PLAG IN
GLOMEROPORPHYRITIC CLUSTERS,CPX+PLAG+OL XTLLIZED
EARLY*
Groundmass - OLIVINE
OL ALTERED TO SMEC;
PLAGIOCLASE ( 1-2%)
Size(mm): .05-0.3 Morphology: ELONGATE,TAPERED,HOLLOW,
Morphology: SWALLOWTAIL
THIS PLAG IN SPHERULE ZONE;
PLAGIOCLASE (25-30%)
Size(mm): .05-.3 Morphology: SERIATE
THIS PLAG 2 CM FROM SPHERULE ZONE,SECTION HAS 5
TEXTURAL ZONES (CF 3-3-140-4C);
CLINOPYROXENE (25-30%)
Size(mm): .05-.2 Morphology: DENDRITIC PLUMOSE
2 CM FROM SPHERULITIC ZONE,
SIZE IS FOR UNIT,W=.0008-.01,L=.01-.05,MEASURED IN
ZONE 5
OPAQUE MINERALS ( 5-10%)
INCLUDES MAGN + ILMENITE,MINUTE GRANULES OUTLINE
BOUNDARIES BETWEEN SPHERULES;
OTHER ( 90%)
Size(mm): .1-.3 Morphology: ELLIPSOIDAL SHEAVES
SPHERULITES,% IS IN SPHR ZONE, 2 CM FROM
SPHERULITIC ZONE=30%,ALL LENGTH SLOW,POSSIBLY
AUGITE,SPHERULITIC ZONE 2.6MM THICK;
OTHER
DENDRITES,EXTENDING FROM PALAG ALONG CALCITE VEIN,
ID UNCERTAIN FOR ABORESCENT STRINGS OF GLOBULITES*
Alteration - CARBONATE
Location: VEIN
FILLED WITH YELLOW-BROWN ISOTROPIC MATERIAL AND
DARK BROWN TO OPAQUE PARTICLES;
CLAY MINERALS
Location: XTLLINE ROCK Replacing: OL
INCLUDES SMEC*
Vesicles -
Size(mm): .05-1.1
Percent: 3-4
Location: THROUGHOUT
Filling: DEVT.GLS,SMEC
Shape: ROUNDED +
Shape: IRREGULAR
ID UNCERTAIN FOR DEVITRIFIED GLASS, ALSO INCLUDES
A COLORLESS HIGH RELIEF ISOTROPIC SUBSTANCE AND
ORANGE-RED FE-STAINED PHYLLOSITIC SUBSTANCE,
VARIABLE AND COMPLEX*
Leg : 73 Top/Bottom Interval(mm): 940/ 0 Describer: Carman, M.
Hole: 522B Top of Core Depth(m) : 156.00 Rock Type: IGNEOUS
Core: 4 Sample Midpoint(m) : 158.44 Sect/Pc #: 2/PCE 3A
ROCK = OL-PLAG-CPX MICROPHYRIC BASALT
EXTENSIVELY ALTERED;
Texture: SERIATE,MICROPHYRIC, MOD.ADVANCED ELONGATE;
CF 4-1-77-2;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): .08-.4
PLAGIOCLASE ( .5%)
Size(mm): .12-1.0 Morphology: CLEAR STUBBY,SIMPLY TWINNED
APPROX COMP AN75 BY CARLSBAD-AB,THIS IS 1ST
GENERATION PLAG;
PLAGIOCLASE ( 2-3%)
Size(mm): .16-1.16 Morphology: ELONGATE,HOLLOW,TAPERED
2V=90,APPROX COMP AN70-80, THIS IS 2ND GENERATION
PLAG;
CLINOPYROXENE ( 1-2%)
Size(mm): .05-.16
Groundmass - OLIVINE
EXTENSIVELY ALTERED;
PLAGIOCLASE (25-30%)
Size(mm): .02-.74 Morphology: HOLLOW,SW.TAIL,TAPERED
L/W=1/10-1/15, EXTREME=1/40;
CLINOPYROXENE (40-50%)
Morphology: PLUMOSE,DENDRITIC SPERULITES
COARSENING FROM TYPICAL FINE SPINIFEX-SPHERULITIC;
OPAQUE MINERALS ( 10%)
Size(mm): .003-.03
INCLUDES MAGN+ILMENITE;
ALTERED GLASS ( 1-5%)
Morphology: INTERSTITIAL
ALTERED TO SMEC,REPLACING GLASS*
Alteration - CLAY MINERALS
Location: INTERSERTAL Replacing: GLASS
Vesicles -
Size(mm): .04-1.2
Percent: 5
Filling: SMEC,CALCITE
Shape: REGULAR +
Shape: IRREGULAR
MANY EMPTY, SMEC-LINED*
Leg : 73 Top/Bottom Interval(mm): 670/ 0 Describer: Carman, M.
Hole: 522B Top of Core Depth(m) : 160.40 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 161.07 Sect/Pc #: 1/PCE 5B
ROCK = PLAG-OL-CPX MICROPHYRIC BASALT;
Texture: SERIATE, MICROPHYRIC,ADVANCED ELONGATE,
INTERSERTAL
THICK PLUMOSE DENDRITIC CPX;
Where sampled: PILLOW INTERIOR?*
Phenocrysts- OLIVINE ( 2-4%)
Size(mm): .1-.3 Morphology: EUHEDRAL + SUBOPHITIC
ID UNCERTAIN FOR OL,INTERGROWN W/ PLAG,RELATIVELY
SPARSE?,DIFFICULT TO SEE;
PLAGIOCLASE ( 5-10%)
Morphology: SUBHED,RADIAL CLUSTER+SINGLE
2ND GENERATION,2V=90,APPROX COMP AN70-80,L/W=1/15;
CLINOPYROXENE ( 2-4%)
Size(mm): .05-.25 Morphology: ANHED,SUBOPH. INTERGROWN WITH
Morphology: PLAG AT CLUSTER CENTER
Groundmass - PLAGIOCLASE (25-35%)
Size(mm): .04-.67
SIZE RANGE INCLUDES MICROPHENOS;
CLINOPYROXENE (30-40%)
Size(mm): .001-.009 Morphology: COARSE ELLIPTICAL SPHERULES
Morphology: COMPOSED OF FIBROUS SHEAVES +
Morphology: SUBOPH.THICK PLUMOSE DENDRIT.
Morphology: + FINELY GRANULAR
OPAQUE MINERALS (10-15%)
Size(mm): .001-.008 Morphology: CUBES,PLATES
INCLUDES MAGN + ILMENITE, INTERSTITIAL BETWEEN
PLAG AND PLUMOSE AUGITE IN INTERSERTAL PATCHES;
GLASS ( 5-10%)
INTERSERTAL, DEVT. TO GREEN SMEC*
Vesicles -
Size(mm): .08-.4
Filling: SMEC
Shape: ROUND,
Shape: IRREGULAR
5 OR 6 SEGREGATION,VESICLES SEEN .08-.6 MM,GREEN
SMECTITE AND RED-STAINED SMEC*
Leg : 73 Top/Bottom Interval(mm): 1000/ 0 Describer: Carman, M.
Hole: 522B Top of Core Depth(m) : 160.40 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 161.40 Sect/Pc #: 1/PCE 7
ROCK = PLAG-OL-CPX SPARSELY MICROPHYRIC BASALT
EXTENSIVELY ALTERED;
Texture: SPARSELY MICROPHYRIC,ELONGATE,COARSE PLUMOSE
DENDRITIC , COARSE SPHERULITIC*
Phenocrysts- OLIVINE ( <1%)
Size(mm): .05-.25 Morphology: EUHEDRAL,SUBOPHITIC
EXTENSIVELY ALTERED;
PLAGIOCLASE ( <1%)
Size(mm): .08-.7 Morphology: SUBHED,STUBBY,SIMPLY TWINNED
THIS IS 1ST GENERATION PLAG,2V=90,APPROX COMP
AN70-80,L/W=1/2 TO 1/10;
PLAGIOCLASE
Size(mm): .05-.5
THIS IS 2ND GENERATION PLAG;
CLINOPYROXENE ( <1%)
Size(mm): .02-.13 Morphology: ANHEDRAL
INTERGROWN WITH PLAG,PARTLY SUBOPHITIC,
CPX+PLAG+OL XTLLIZED EARLY*
Groundmass - OLIVINE ( 5%)
Size(mm): .01-.03
ID UNCERTAIN FOR OL, EXTENSIVELY ALTERED, FINELY
INTERGRANULAR?;
PLAGIOCLASE (30-40%)
Size(mm): .04-.5 Morphology: ELONGATE,SWALLOWTAIL,HOLLOW,
Morphology: TAPERED
AVE. L/W=1/10 TO 1/15, SOME L/W=1/5 TO 1/33;
CLINOPYROXENE (30-40%)
Size(mm): .01-.2 Morphology: THICK PLUMOSE DENDRITIC,
Morphology: COARSE SPHERULITIC SHEAVES
SIZE IS FOR UNIT, L=.01-.03,W=.008-.01 AND
.04-.07,FIBER THICKNESS=.0008;
OPAQUE MINERALS (10-15%)
Size(mm): .002-.008 Morphology: CUBES,PLATES
SIZE IS FOR CUBES, FOR PLATES=.015-.02, INCLUDES
MAGN + ILMENITE;
ALTERED GLASS (10-15%)
Morphology: INTERSTITIAL
ID UNCERTAIN FOR ALT.GLS,ALT. TO YELLOW-GN. SMEC.;
PALAGONITE
GLASS LINED FRACTURE,NOW PALAG-RETAINS SPHERULITIC
STRUCTURE,SPHERULES NOW ALTERED TO FE.OX (HEM),
.02-.05 THICK COMPLETELY ACROSS SECTION*
Alteration - CARBONATE
Location: VESICLES
Vesicles -
Size(mm): .04-.4
Percent: 3-5
Location: THROUGHOUT
Shape: ROUND,
Shape: IRREGULAR
YELLOW-GREEN SMEC + CARB,YELLOW-GREEN SMEC +
HEMATITE= FILLING*
Leg : 73 Top/Bottom Interval(mm): 1140/ 0 Describer: Carman, M.
Hole: 522B Top of Core Depth(m) : 160.40 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 161.54 Sect/Pc #: 1/
ROCK = PLAG-OL-CPX MODERATELY MICROPHYRIC BASALT;
Texture: GLASSY,MICROPHYRIC,SPHERULITIC,ELONGATE,PLUMOSE
DENDRITIC
GRADES TO MOD.ADV. SPINIFEX AT 25CM FROM ZONE 4;
Where sampled: GLASSY MARGIN*
Phenocrysts- OLIVINE ( .5-1%)
Size(mm): .04-.25 Morphology: SKELETAL,EUHEDRAL-SUBHEDRAL,
Morphology: SUBOPHITIC
2VX=85-90,APPROX COMP FO70-80;
PLAGIOCLASE ( 1-2%)
Size(mm): .04-.5 Morphology: EUHEDRAL,SOLID,TABULAR PRISMS
2 GENERATIONS PLAG,1ST STUBBY AND SIMPLY TWINNED,
2V=90,APPROX COMP AN70-80, APPROX COMP AN75-65 BY
A-NORMAL METHOD;
CLINOPYROXENE ( .5-1%)
Size(mm): <.01
ID UNCERTAIN FOR CPX, FINELY GRANULAR, INTERGROWN
WITH PLAG,
PLAG+CPX+OL XTLLIZED EARLY*
Groundmass - PLAGIOCLASE (25-35%)
Size(mm): .03-.55 Morphology: ELONGATE,SWALLOWTAIL.HOLLOW,
Morphology: TAPERED
R.I. > ARALDITE,APPROX COMP AN>50,L/W=1/5 TO 1/45,
AVE. L/W=1/10 TO 1/20,
5 ZONES PRESENT- CF 3-3-140-PCE 4C;
CLINOPYROXENE (35-45%)
Size(mm): .05-.10 Morphology: PLUMOSE DENDRITIC,SPHERULITES
INCLUDES SPHERULES,
SIZE IS FOR UNIT, L=.005-.05,W=.0008-.004,FIBER
THICKNESS=.0005, DENDRITES MEASURED 1.4 CM FROM
ZONE 2,COARSENS TO THICK PLUMOSE 2CM FROM GLASS
CONTACT SPHERULITES UNIT SIZE=.08-.15,W=.03-.06;
OPAQUE MINERALS ( 10%)
Size(mm): .001-.01 Morphology: CUBES,OCTAHEDRA,PLATES
INCLUDES MAGN + ILMENITE, CONCENTRATED BETWEEN
SPHERULES BEGIN IN ZONE 3;
GLASS
YELLOW-BROWN PALAG+DENDRITES BORDER CRACKS, 1CM
RIND SEPARATED FROM XTLLINE ROCK BY CALCITE VEIN,
HIGH PLAG+OL CONCENTRATION,4 TYPES:A= GLS.SPHR-
ZONE 2)2.5MM THICK,B=COALESCED SPHR,(ZONE 3) 2.5
MM THICK,C=SHEAF-SHAPED SPHR+PLUMOSE DENDRITES
(ZONE 4) 4MM THICK, D=(ZONE 5) 2.5CM*
Alteration - CARBONATE
VEIN CUTTING GLASS AND SEPARATING GLASS SPHR OF
ZONE 2;
CLAY MINERALS
Replacing: OL,GLASS
INCLUDES SAPONITE? AND PALAGONITE*
Vesicles -
Size(mm): .04-.6
Percent: 2-3
Location: THROUGHOUT
Filling: YELLOW SMEC,
Shape: ROUND +
Shape: ROUNDED
Filling: CALCITE
Shape: IRREGULAR
MOST FILLED, FEW LINED AND EMPTY,FILLING INCLUDES
HIGH RELIEF ISOTROPIC SUBSTANCE*
Leg : 73 Top/Bottom Interval(mm): 1230/ 0 Describer: Carman, M.
Hole: 522B Top of Core Depth(m) : 160.40 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 163.13 Sect/Pc #: 2/PCE 2F
ROCK = PLAG SPARSELY MICROPHYRIC BASALT
EXTENSIVELY ALTERED;
Texture: FINELY SERIATE,APHYRIC,SUBOPHITIC,INTERGRANULAR,
INTERSERTAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): .04-.68 Morphology: STUBBY,SUBHED,SIMPLY TWINNED
2V=90,APPROX COMP AN70-80, SUBOPHITIC AUGITE AS
SKELETAL SERRATED GRAINS RELATED TO THICK PLUMOSE
DENDRITES, 5 CLUSTERS OF CRYSTALS SEEN*
Groundmass - OLIVINE ( 5%)
ALTERED TO OLIVE GREEN SMEC?;
PLAGIOCLASE (30-35%)
Size(mm): .04-.72 Morphology: SUBHEDRAL-EUHEDRAL,HOLLOWBOX,
Morphology: TAPERED,LATH-SHAPED
APPROX COMP AN63,AN77-30,AN68 BY CARLSBAD-AB, L/W=
1/2-1/18, AVE.=1/8-1/10;
CLINOPYROXENE (30-35%)
Size(mm): .04-.75 Morphology: ANHEDRAL+SUBHEDRAL
2VZ=60, MOSTLY SUBOPHITIC,SPARSE OPH.,THICK SKEL.
PLUMOSE + SERRATED, BOW-TIE SUBOPHITIC COMMON,
INTERSTITIAL AND CONCENT. IN INTERSERTAL PATCHES;
OPAQUE MINERALS ( 10%)
Size(mm): .005-.05 Morphology: OCTAHEDRA,CUBES,PLATES,
Morphology: SERRATED CLUSTERS
SIZE IS FOR CUBES,FOR PLATES=.04-.05,CLUSTERS=.020
-.040(2ND GEN.),.040-.080(1ST GEN.), INCLUDES MAGN
+ ILMENITE;
ALTERED GLASS ( 20%)
Size(mm): .08-1.8
IN ANGULAR SPACES BETWEEN PLAG AND CPX,ALTERED
20% IN INTERSERTAL PATCHES + 10% OPAQUES*
Alteration - CARBONATE
Location: VEIN
.1-1.0 MM WIDE ACROSS ENTIRE SLIDE*
Vesicles -
Size(mm): .08-.48
Percent: 1-2
Location: THROUGHOUT
Filling: SMEC,HEMATITE
Shape: ROUND
Size(mm): .05-1.5
Percent: <1
Location: THROUGHOUT
Filling: SMEC
Shape: IRREGULAR
DIKTYTAXITIC,ID UNCERTAIN FOR HEMATITE*
Leg : 73 Top/Bottom Interval(mm): 560/ 0 Describer: Carman, M.
Hole: 522B Top of Core Depth(m) : 160.40 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 163.96 Sect/Pc #: 3/PCE 2C
ROCK = PLAG SPARSELY MICROPHYRIC BASALT
EXTENSIVELY ALTERED;
Texture: SUBOPHITIC,INTERSERTAL,SPARSELY MICROPHYRIC
INTERSERTAL PATCHES SO ABUNDANT AS TO BE LOCALLY
HYALOOPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): .1-.45 Morphology: SUBHED,STUBBY,SIMPLY TWINNED
APPROX COMP AN63 BY CARLSBAD-AB,L/W=1/2:1/3;
Groundmass - OLIVINE ( 5-10%)
Size(mm): .05-.22 Morphology: SUBOPHITIC,ANHEDRAL,EUHEDRAL,
Morphology: INTERGRANULAR
EXTENSIVELY ALTERED,PROBABLY MICROPHYRIC;
PLAGIOCLASE (35-40%)
Size(mm): .025-.48 Morphology: SKELETAL,ELONGATE SUBHEDRAL
Morphology: LATHS
COARSELY SKELETAL WITHIN HOLLOW CENTERS,MANY LATHS
CRUDELY TAPERED,
APPROX COMP AN63 BY CARLSBAD-AB;
CLINOPYROXENE (30-35%)
Size(mm): .02-.36 Morphology: ANHEDRAL-SUBOPHITIC,BOW-TIE
2VZ=60, UNDULATORY EXTINCTION SUGGESTS RELATION
TO PLUMOSE DENDRITIC + SPHR. TEX;
OPAQUE MINERALS (10-15%)
Size(mm): .002-.015 Morphology: CUBES,PLATES,OCTAHEDRA
SIZE IS FOR CUBES,FOR PLATES=.03;
INCLUDES MAGN+ILMENITE, IN INTERSERTAL SPACES;
GLASS (20-25%)
INTERSERTAL MESOSTASIS,ALT. TO SMEC*
Alteration - CLAY MINERALS
Replacing: OL,GLASS
INCLUDES SMEC*
Vesicles -
Size(mm): .08-.40
Percent: 1.3
Location: THROUGHOUT
Filling: OLIVE GN. SMEC
Shape: ROUND
Size(mm): .10-.72
Percent: 1.3
Location: THROUGHOUT
Filling: OLIVE GN. SMEC
Shape: IRREGULAR
DIKTYTAXITIC;
Size(mm): .22-.40
Percent: .3
Location: THROUGHOUT
Filling: OLIVE GN. SMEC
Shape: SEGREGATED
Leg : 73 Top/Bottom Interval(mm): 340/ 0 Describer: Carman, M.
Hole: 522B Top of Core Depth(m) : 167.40 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 167.74 Sect/Pc #: 1/PCE 5
ROCK = PLAG-OL-CPX MODERATELY MICROPHYRIC BASALT
EXTENSIVELY ALTERED;
Texture: FINELY SERIATE, MICROPHYRIC,SUBOPHITIC,
INTERSERTAL,
INTERGRANULAR, CF 5-2-123-2F AND 5-3-56-2C;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): .05-1.6 Morphology: EUHEDRAL-ANHEDRAL,SUBOPHITIC
EXTENSIVELY ALTERED;
PLAGIOCLASE ( <1%)
Size(mm): .16-1.1 Morphology: SUBHED-STUBBY,SIMPLY TWINNED
THIS IS 1ST GEN. PLAG,CLEAR,SOLID,L/W:1/1-1/5;
PLAGIOCLASE ( 1%)
Size(mm): .6-1.3 Morphology: SUBHEDRAL-ANHEDRAL,ELONGATED,
Morphology: TAPERED
THIS IS 2ND GEN. PLAG, MODERATELY ZONED, 2V 90,
APPROX COMP AN70-80,INCLUSIONS IN CORES,INTERGROWN
W/ OL AND CPX;
CLINOPYROXENE ( 1%)
Size(mm): .04-.24 Morphology: ANHEDRAL,SUBOPHITIC,BOW-TIE
OL+PLAG+CPX XTLLIZED EARLY*
Groundmass - PLAGIOCLASE (30-35%)
Size(mm): .02-.60 Morphology: SKELETAL,HOLLOW,TAPERED
TEND TO RADIAL CLUSTERS OR SHEAVES W/ CPX,AN62-35
BY CARLSBAD-ALBITE;
CLINOPYROXENE (35-40%)
Size(mm): .01-.24 Morphology: ANHEDRAL,SUBOPHITIC,BOW-TIE,
Morphology: INTERGRANULAR,COARSE PLUMOSE,
Morphology: DENDRITIC,SPHERULITIC
2V=60,LIKE 5-3-56-2C PLAG+CPX COMMONLY INTERGROWN
IN SHEAF-LIKE ARRANGEMENT,CPX COARSELY PLUMOSE
DENDRITIC ESPECIALLY IN LARGER INTERSERTAL AREAS;
OPAQUE MINERALS (10-15%)
Size(mm): .003-.015 Morphology: CUBES,OCTAHEDRA,PLATES
SIZE IS FOR CUBES+OCTAHEDRA, FOR PLATES=.04-.06,
CONCENTRATED IN INTERSERTAL MESOSTASIS,INCLUDES
MAGN + ILMENITE;
GLASS (15-20%)
INTERSERTAL MESOSTAS,ALT. TO SMEC*
Alteration - CLAY MINERALS (20-25%)
Replacing: INTERSERTAL GLASS,OL
INCLUDES SMEC*
Vesicles -
Size(mm): .08-.36
Percent: .2
Location: THROUGHOUT
Filling: SMEC
Shape: ROUND
BROWN SMEC;
Size(mm): .04-1.7
Percent: 1
Location: THROUGHOUT
Shape: IRREGULAR
Size(mm): .4
Percent: .05
Location: THROUGHOUT
Shape: SEGREGATED
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