Leg : 65 Top/Bottom Interval(mm): 150/ 160 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 105.50 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 110.16 Sect/Pc #: 4/PCE 1B
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,MEDIUM-GRAINED,
INTERGRANULAR;
Where sampled: FLOW INTERIOR
WHERE SAMPLED IS QUESTIONABLE*
Phenocrysts- OLIVINE ( TR%)
Size(mm): 1-2 Morphology: SUBHEDRAL
ALTERED TO SMEC,USUALLY IN GLOMEROPHYRIC CLOTS
WITH PLAG;
PLAGIOCLASE ( 5-7%)
Size(mm): 1-4 Morphology: SUBHEDRAL,PRISMS
FRESH,USUALLY IN GLOMEROPHYRIC CLOTS*
Groundmass - OLIVINE ( 2-3%)
Size(mm): 0.3-0.5 Morphology: SUBHEDRAL
ALTERED TO SMEC;
PLAGIOCLASE ( 55%)
Size(mm): 0.1-0.6 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 30%)
Size(mm): 0.2-0.6 Morphology: ANHEDRAL
FRESH,2VZ=35;
OPAQUE MINERALS ( 3%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 5-10%)
INTERSTITIAL MATERIAL,REPLACED BY GREEN SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + INTERSTITIAL MATERIAL REPLACED BY GREEN SMEC;
CARBONATE
Location: VESICLES
VESICLES FILLED WITH GREEN SMEC + MINOR CARB*
Vesicles -
Size(mm): 0.2-0.5
Percent: 1
Filling: SMEC,CARB
Shape: ROUND
FILLED WITH GREEN SMEC + MINOR CARB*
Leg : 65 Top/Bottom Interval(mm): 330/ 350 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 115.00 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 115.34 Sect/Pc #: 1/PCE 2C
ROCK = APHYRIC BASALT*
Texture: APHYRIC,COARSE-GRAINED,SUBOPHITIC-INTERSERTAL;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 3-5%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL
PARTLY REPLACED BY SMEC + CARB,SOME FRESH,2VZ=88;
PLAGIOCLASE (55-60%)
Size(mm): 0.2-1.2 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE (30-35%)
Size(mm): 0.2-0.7 Morphology: ANHEDRAL,TABULAR
FRESH,2VZ=35-40;
OPAQUE MINERALS ( 2-3%)
Size(mm): 0.03-0.15 Morphology: SUBHEDRAL
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 5%)
INTERSTITIAL MATERIAL,REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
INTERSTITIAL MATERIAL + SOME OL REPLACED BY SMEC +
CARB;
CARBONATE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
INTERSTITIAL MATERIAL + SOME OL REPLACED BY SMEC +
CARB*
Vesicles -
Size(mm): 0.5-1
Percent: 3-5
Filling: SMEC,CARB
Shape: ROUND
MANY WITH GLASSY SEGREGATIONS*
Leg : 65 Top/Bottom Interval(mm): 90/ 110 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 115.00 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 116.60 Sect/Pc #: 2/PCE 1B
ROCK = APHYRIC BASALT
POOR THIN SECTION--MUCH OF SECTION TOO THIN AND
PARTS MAY HAVE BEEN SMEARED AWAY;
Texture: APHYRIC,COARSE-GRAINED,SUBOPHITIC-INTERSERTAL;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 3-5%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL
COMPLETELY REPLACED BY SMEC;
PLAGIOCLASE (55-60%)
Size(mm): 0.2-1.2 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE (30-35%)
Size(mm): 0.2-0.7
MOSTLY FRESH,SOME RIMMED WITH SMEC OR ?AMPH,
2VZ=35-40;
OPAQUE MINERALS ( 2-3%)
Size(mm): 0.03-0.15 Morphology: SUBHEDRAL
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 5-10%)
INTERSTITIAL MATERIAL,ALTERED TO SMEC + MINOR
CARB*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + INTERSTITIAL MATERIAL REPLACED BY SMEC +
MINOR CARB;
CARBONATE
Location: INTERSTITIAL Replacing: OL
OL + INTERSTITIAL MATERIAL REPLACED BY SMEC +
MINOR CARB;
AMPHIBOLE
Replacing: PYX
IDENTITY OF AMPH IS QUESTIONABLE,SOME GREEN
PRISMATIC XTLS (AMPH?) RIM SOME PYX GRAINS*
Vesicles -
Size(mm): 0.5-1
Percent: 2-3
Filling: SMEC
Shape: ROUND
RIMMED WITH PRISMATIC XTLS AND FILLED WITH SMEC,
SOME WITH GLASSY SEGREGATIONS*
Leg : 65 Top/Bottom Interval(mm): 170/ 210 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 124.00 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 124.19 Sect/Pc #: 1/PCE 3
ROCK = APHYRIC BASALT;
Texture: APHYRIC,COARSE-GRAINED,SUBOPHITIC-INTERSERTAL;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): 1-3 Morphology: SUBHEDRAL
FRESH*
Groundmass - OLIVINE ( 3-5%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL
PARTLY REPLACED BY SMEC,MUCH FRESH OL REMAINS,
2V=90;
PLAGIOCLASE (50-55%)
Size(mm): 0.5-1.2 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE (35-40%)
Size(mm): 0.2-0.6 Morphology: ANHEDRAL-TABULAR
FRESH,2VZ=35-40;
OPAQUE MINERALS ( 2-3%)
Size(mm): 0.05-0.15 Morphology: SUBHEDRAL
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 5-10%)
INTERSTITIAL MATERIAL,MOSTLY REPLACED WITH SMEC,
SOME QUARTZ + APATITE;
QUARTZ
MICROXLN,INTERSTITIAL;
APATITE
MICROXLN,INTERSTITIAL*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
SOME OL + INTERSTITIAL MATERIAL REPLACED BY SMEC;
CARBONATE
Location: VESICLES
VESICLES FILLED WITH BROWN SMEC + TRACES OF CARB*
Vesicles -
Size(mm): 0.1-0.2
Percent: <1
Filling: SMEC,CARB
Shape: ROUND
FILLED WITH BROWN SMEC + TRACES OF CARB*
Leg : 65 Top/Bottom Interval(mm): 1200/1210 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 124.00 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 126.71 Sect/Pc #: 2/PCE 2
ROCK = APHYRIC BASALT;
Texture: APHYRIC,MEDIUM-GRAINED,INTERGRANULAR-
INTERSERTAL;
Where sampled: FLOW INTERIOR
WHERE SAMPLED IS QUESTIONABLE*
Groundmass - OLIVINE ( 3-5%)
Size(mm): 0.3-0.5 Morphology: SUBHEDRAL
REPLACED BY SMEC + MINOR CARB;
PLAGIOCLASE ( 50%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 35%)
Size(mm): 0.2-0.6 Morphology: ANHEDRAL
FRESH,2VZ=40;
OPAQUE MINERALS ( 3%)
Size(mm): 0.05-0.1 Morphology: SKELETAL
PROBABLY MAGN,OFTEN SKELETAL;
MICROCRYST GROUNDMASS ( 5-10%)
INTERSTITIAL MATERIAL,REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL Replacing: OL
OL + INTERSTITIAL MATERIAL REPLACED BY SMEC +
MINOR CARB;
CARBONATE
Location: INTERSTITIAL Replacing: OL
OL + INTERSTITIAL MATERIAL REPLACED BY SMEC +
MINOR CARB*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 10/ 20 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 124.00 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 127.01 Sect/Pc #: 3/PCE 1A
ROCK = APHYRIC BASALT;
Texture: APHYRIC,FINE- TO MEDIUM-GRAINED,INTERGRANULAR-
INTERSERTAL OR SLIGHTLY SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 5-8%)
Size(mm): 0.2-0.3 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 50%)
Size(mm): 0.3-0.5 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 35%)
Size(mm): 0.1-0.3 Morphology: ANHEDRAL
FRESH,2VZ=40;
OPAQUE MINERALS ( 2-3%)
Size(mm): 0.1-0.3 Morphology: SKELETAL
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 5%)
INTERSTITIAL MATERIAL,REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL Replacing: OL
OL + INTERSTITIAL MATERIAL REPLACED BY SMEC*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 1140/1150 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 133.00 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 134.14 Sect/Pc #: 1/PCE 4B
ROCK = APHYRIC BASALT;
Texture: APHYRIC,FINE- TO MEDIUM-GRAINED,INTERGRANULAR-
INTERSERTAL*
Groundmass - OLIVINE ( 2-3%)
Size(mm): 0.1-0.5 Morphology: SUBHEDRAL
REPLACED BY SMEC + TRACES OF CARB;
PLAGIOCLASE ( 55%)
Size(mm): 0.2-0.6 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE (35-40%)
Size(mm): 0.1-0.2 Morphology: ANHEDRAL
FRESH,2VZ=40;
OPAQUE MINERALS ( 2-3%)
Size(mm): 0.05-0.2 Morphology: SUBHEDRAL
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 5%)
INTERSTITIAL MATERIAL,REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + INTERSTITIAL MATERIAL REPLACED BY SMEC*
Vesicles -
Size(mm): 0.2
Percent: <1
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 1330/1340 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 133.00 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 134.34 Sect/Pc #: 1/PCE 6
ROCK = APHYRIC BASALT;
Texture: APHYRIC,MEDIUM-GRAINED,INTERSERTAL-
INTERGRANULAR;
Where sampled: FLOW INTERIOR
WHERE SAMPLED IS QUESTIONABLE*
Phenocrysts- OLIVINE ( TR%)
Size(mm): 1-3 Morphology: SUBHEDRAL
PARTLY REPLACED BY SMEC;
PLAGIOCLASE ( <1%)
Size(mm): 1-4 Morphology: SUBHEDRAL,PRISMS
FRESH*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL
MOSTLY REPLACED BY SMEC;
PLAGIOCLASE (55-60%)
Size(mm): 0.2-1 Morphology: SUBHEDRAL,LATHS
FRESH,SOMEWHAT ZONED;
CLINOPYROXENE (30-35%)
Size(mm): 0.1-0.4 Morphology: ANHEDRAL
FRESH,2VZ=35;
OPAQUE MINERALS ( 1-2%)
Size(mm): 0.02-0.2
LARGELY REPLACED BY SMEC,SOME QUARTZ +
APATITE;
QUARTZ
REPLACES MICROCRYSTALLINE;
APATITE
REPLACES MICROCRYSTALLINE*
Alteration - SMECTITE
Location: INTERSTITIAL Replacing: OL
OL + INTERSTITIAL MATERIAL MOSTLY REPLACED BY
SMEC*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 580/ 600 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 133.00 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 135.09 Sect/Pc #: 2/PCE 3B
ROCK = APHYRIC BASALT;
Texture: APHYRIC,MEDIUM-GRAINED,INTERGRANULAR-
INTERSERTAL*
Phenocrysts- PLAGIOCLASE ( TR%)
Morphology: SUBHEDRAL
FRESH*
Groundmass - OLIVINE ( 2-3%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 55%)
Size(mm): 0.1-0.5 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE
Size(mm): 0.1-0.3 Morphology: ANHEDRAL
FRESH,2VZ=40;
OPAQUE MINERALS ( 2-3%)
Size(mm): 0.02-0.2 Morphology: SUBHEDRAL
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 5%)
INTERSTITIAL MATERIAL,REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL Replacing: OL
OL + INTERSTITIAL MATERIAL REPLACED BY SMEC*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 90/ 100 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 133.00 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 136.10 Sect/Pc #: 3/PCE 1
ROCK = APHYRIC BASALT;
Texture: APHYRIC,FINE-GRAINED,INTERGRANULAR-INTERSERTAL*
Groundmass - OLIVINE ( 1-2%)
Size(mm): 0.05-0.15 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE (45-50%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE (35-45%)
Size(mm): 0.05-0.15 Morphology: ANHEDRAL
FRESH,SOME POORLY CRYSTALLIZED PATCHES,2VZ=40;
OPAQUE MINERALS ( 2%)
Size(mm): 0.01-0.05 Morphology: SUBHEDRAL
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 5-15%)
INTERSTITIAL MATERIAL,GLASSY OR POORLY
CRYSTALLIZED MATERIAL IN IRREGULAR PATCHES,MOSTLY
FRESH,SOME REPLACEMENT BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL Replacing: OL
OL + INTERSTITIAL MATERIAL REPLACED BY SMEC*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 640/ 660 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 142.00 Rock Type: IGNEOUS
Core: 17 Sample Midpoint(m) : 142.65 Sect/Pc #: 1/PCE 7A
ROCK = APHYRIC BASALT;
Texture: APHYRIC,MEDIUM- TO COARSE-GRAINED,SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 5-7%)
Size(mm): 0.05-0.2
PARTLY ALTERED TO SMEC,2V=90;
PLAGIOCLASE ( 45%)
Size(mm): 0.2-1.1 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 45%)
Size(mm): 0.2-1.5 Morphology: ANHEDRAL
OPHITIC XTLS,FRESH,2VZ=40;
OPAQUE MINERALS ( 2-3%)
Size(mm): 0.02-0.1 Morphology: SUBHEDRAL
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 1-2%)
INTERSTITIAL MATERIAL,REPLACED BY SMEC + MINOR
CARB*
Alteration - SMECTITE
Location: INTERSTITIAL Replacing: OL
OL RIMMED BY SMEC,MINOR SMEC + CARB REPLACING
INTERSTITIAL MATERIAL;
CARBONATE
Location: INTERSTITIAL
MINOR SMEC + CARB REPLACING INTERSTITIAL MATERIAL*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 1030/1050 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 151.00 Rock Type: IGNEOUS
Core: 18 Sample Midpoint(m) : 156.54 Sect/Pc #: 4/PCE 1
ROCK = APHYRIC BASALT;
Texture: APHYRIC,MEDIUM- TO COARSE-GRAINED,MOSTLY
SUBOPHITIC*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.1-0.2 Morphology: SUBHEDRAL
PARTLY REPLACED BY SMEC,2V=90;
PLAGIOCLASE (40-45%)
Size(mm): 0.2-1 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE ( 40%)
Size(mm): 0.1-1.2 Morphology: ANHEDRAL
SUBOPHITIC,FRESH,2VZ=40;
OPAQUE MINERALS ( 2-3%)
Size(mm): 0.05-0.15 Morphology: SUBHEDRAL
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 2%)
INTERSTITIAL MATERIAL,REPLACED BY SMEC + MINOR
CARB*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: FRACTURES
OL + INTERSTITIAL MATERIAL REPLACED BY SMEC +
MINOR CARB,RARE HAIRLINE VEINS OR FRACTURES FILLED
WITH SMEC;
CARBONATE
Location: INTERSTITIAL Replacing: OL
OL + INTERSTITIAL MATERIAL REPLACED BY SMEC +
MINOR CARB*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 1400/1420 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 151.00 Rock Type: IGNEOUS
Core: 18 Sample Midpoint(m) : 156.91 Sect/Pc #: 4/PCE 2C
ROCK = APHYRIC BASALT;
Texture: APHYRIC,MEDIUM-GRAINED,INTERSERTAL-
INTERGRANULAR*
Phenocrysts- OLIVINE ( TR%)
Size(mm): 0.5 Morphology: SUBHEDRAL
ALTERED TO SMEC;
PLAGIOCLASE ( <1%)
Size(mm): 2-3 Morphology: SUBHEDRAL
SUBHEDRAL GLOMEROCRYSTS,FRESH*
Groundmass - OLIVINE ( 5-7%)
Size(mm): 0.1-0.5 Morphology: SUBHEDRAL
REPLACED BY BROWN SMEC;
PLAGIOCLASE ( 50%)
Size(mm): 0.2-1 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 35%)
Size(mm): 0.1-0.3 Morphology: ANHEDRAL
FRESH,2VZ=40;
OPAQUE MINERALS ( 2-3%)
Size(mm): 0.05-0.2 Morphology: SUBHEDRAL
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 5%)
INTERSTITIAL MATERIAL,MOSTLY REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + INTERSTITIAL MATERIAL REPLACED BY SMEC*
Vesicles -
Size(mm): 0.5
Percent: TR
Filling: SMEC
Shape: ROUND
FILLED WITH BROWN SMEC*
Leg : 65 Top/Bottom Interval(mm): 1440/1460 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 169.00 Rock Type: IGNEOUS
Core: 20 Sample Midpoint(m) : 170.45 Sect/Pc #: 1/PCE 16
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,INTERGRANULAR,VARIOLITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 3-4%)
Size(mm): 1-2 Morphology: SUBHEDRAL
REPLACED BY SMEC + CARB;
PLAGIOCLASE ( 10%)
Size(mm): 1-4 Morphology: SUBHEDRAL-EUHEDRAL
FRESH,OFTEN ZONED*
Groundmass - OLIVINE ( 2-3%)
Size(mm): 0.1-0.2 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 55%)
Size(mm): 0.3-0.8 Morphology: SUBHEDRAL,SKELETAL
OFTEN SKELETAL,FRESH;
CLINOPYROXENE ( 30%)
Size(mm): 0.05-0.2 Morphology: GRANULAR
OFTEN POORLY CRYSTALLIZED,FRESH,2VZ=40;
OPAQUE MINERALS ( 3-4%)
Morphology: GRAINS,LATHS
MINUTE GRAINS AND LATHS,PROBABLY MAGN*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL ALTERED TO SMEC + MINOR CARB;
CARBONATE
Replacing: OL
OL ALTERED TO SMEC + MINOR CARB*
Vesicles -
Size(mm): TO 0.8
Percent: TR
Filling: SMEC
Shape: ROUND
FILLED WITH BROWN SMEC,SOME WITH SEGREGATION
PATCHES*
Leg : 65 Top/Bottom Interval(mm): 860/ 880 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 178.00 Rock Type: IGNEOUS
Core: 21 Sample Midpoint(m) : 178.87 Sect/Pc #: 1/PCE 11
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL
REPLACED BY SMEC + CARB;
PLAGIOCLASE ( 3-5%)
Size(mm): 0.2-1.5 Morphology: SUBHEDRAL,LATHS
FRESH,OFTEN ZONED;
CLINOPYROXENE ( <1%)
Size(mm): 0.5-1 Morphology: ROUND
USUALLY INTERGROWN WITH PLAG,FRESH,2VZ=40*
Groundmass - OLIVINE ( 1-2%)
Size(mm): 0.05-0.1 Morphology: EUHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 15%)
Size(mm): 0.05-0.3 Morphology: ACICULAR
FRESH;
CLINOPYROXENE ( 3%)
Size(mm): 0.03-0.05 Morphology: GRANULAR
FRESH;
OPAQUE MINERALS ( 5%)
Size(mm): 0.005-0.01 Morphology: OCTAHEDRA,GRANULES
PROBABLY MAGN;
MICROCRYST GROUNDMASS (70-75%)
Morphology: SHEAF-LIKE
MATRIX,QUENCH MIXTURE WITH POORLY DEVELOPED
SHEAF-LIKE PATTERNS*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL ALTERED TO SMEC + MINOR CARB;
CARBONATE
Replacing: OL
OL ALTERED TO SMEC + MINOR CARB*
Vesicles -
Size(mm): 0.5-1
Percent: TR
Filling: SMEC
Shape: ROUND
LINED WITH SMEC*
Leg : 65 Top/Bottom Interval(mm): 790/ 810 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 178.00 Rock Type: IGNEOUS
Core: 21 Sample Midpoint(m) : 180.30 Sect/Pc #: 2/PCE 8
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 0.2-2.5 Morphology: EUHEDRAL
REPLACED BY SMEC + CARB;
PLAGIOCLASE ( 5%)
Size(mm): 0.5-2 Morphology: SUBHEDRAL
FRESH,OFTEN IN CLUSTERS;
CLINOPYROXENE ( TR%)
Size(mm): 0.05 Morphology: ROUNDED GRAINS
ROUNDED GRAINS + SOME MICROPHENOS INTERGROWN WITH
PLAG;
SPINEL ( TR%)
Morphology: SLIGHTLY ROUNDED
FRESH*
Groundmass - MICROCRYST GROUNDMASS (93-95%)
GLASSY MATERIAL,INCIPIENTLY CRYSTALLIZED,SLIGHTLY
VARIOLITIC*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL REPLACED BY SMEC + MINOR CARB*
Vesicles -
Size(mm): 0.2-1
Percent: <1
Filling: SMEC,EMPTY
Shape: ROUND
FILLED WITH SMEC OR OPEN*
Leg : 65 Top/Bottom Interval(mm): 520/ 540 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 178.00 Rock Type: IGNEOUS
Core: 21 Sample Midpoint(m) : 181.53 Sect/Pc #: 3/PCE 4
ROCK = PLAG-OL-CPX MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL
REPLACED BY SMEC + CARB;
PLAGIOCLASE ( 5%)
Size(mm): 1-3 Morphology: SUBHEDRAL
FRESH,OFTEN STRONGLY ZONED;
CLINOPYROXENE ( 1%)
Size(mm): 0.2-0.5 Morphology: ANHEDRAL
INTERGROWN WITH PLAG,FRESH,2VZ=40,SOME XTLS HAVE
GOOD SECTOR ZONING*
Groundmass - PLAGIOCLASE ( 5%)
Size(mm): 0.1-0.2 Morphology: ACICULAR
FRESH;
OPAQUE MINERALS ( 1-2%)
Morphology: GRANULES
MINUTE GRANULES OF MAGN;
MICROCRYST GROUNDMASS (85-90%)
FRESH*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL REPLACED BY SMEC + CARB;
CARBONATE
Replacing: OL
OL REPLACED BY SMEC + CARB*
Vesicles -
Size(mm): TO 0.5
Percent: <1
Filling: SMEC
Shape: IRREGULAR
Leg : 65 Top/Bottom Interval(mm): 400/ 420 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 182.50 Rock Type: IGNEOUS
Core: 22 Sample Midpoint(m) : 182.91 Sect/Pc #: 1/PCE 3C
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): 0.5-2 Morphology: EUHEDRAL-SUBHEDRAL
REPLACED BY SMEC + MINOR CARB;
PLAGIOCLASE ( 6-7%)
Size(mm): 0.5-2.5 Morphology: SUBHEDRAL
FRESH,STRONGLY ZONED;
CLINOPYROXENE ( <1%)
Size(mm): 0.5-1 Morphology: ROUNDED
SLIGHTLY ZONED*
Groundmass - OLIVINE ( 1%)
Size(mm): 0.05-0.1 Morphology: ANHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE (15-20%)
Size(mm): 0.1-0.5 Morphology: ACICULAR
FRESH;
CLINOPYROXENE (60-65%)
Morphology: RADIATING SHEAVES
POORLY CRYSTALLIZED,FRESH;
OPAQUE MINERALS ( 3-4%)
Size(mm): 0.005-0.01 Morphology: GRANULAR
Alteration - SMECTITE
Replacing: OL
OL ALTERED TO SMEC + MINOR CARB;
CARBONATE
Replacing: OL
OL ALTERED TO SMEC + MINOR CARB*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 930/ 950 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 182.50 Rock Type: IGNEOUS
Core: 22 Sample Midpoint(m) : 184.94 Sect/Pc #: 2/PCE 7B
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.5 Morphology: SUBHEDRAL-EUHEDRAL
ALTERED TO SMEC + MINOR CARB;
PLAGIOCLASE ( 2%)
Size(mm): 0.5-1.5 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE ( TR%)
Size(mm): 1 Morphology: ROUNDED
FRESH*
Groundmass - OLIVINE ( 1%)
Size(mm): 0.05-0.1 Morphology: SUBHEDRAL
ALTERED TO SMEC;
PLAGIOCLASE ( 5%)
Size(mm): 0.1-1 Morphology: ACICULAR
SERIATE IN SIZE,FRESH,ALSO IN MICROCRYSTALLINE
GROUNDMASS;
MICROCRYST GROUNDMASS ( 90%)
MESOSTASIS,POORLY CRYSTALLIZED MIXTURE OF CPX +
PLAG,FRESH;
CLINOPYROXENE
MICROXLN,IN MESOSTASIS,POORLY CRYSTALLIZED*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL REPLACED BY SMEC + MINOR CARB;
CARBONATE
Replacing: OL
OL REPLACED BY SMEC + MINOR CARB*
Vesicles -
Size(mm): 0.2-0.5
Percent: <1
Filling: SMEC
Shape: ROUND
SOME WITH SEGREGATION RIMS*
Leg : 65 Top/Bottom Interval(mm): 380/ 400 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 182.50 Rock Type: IGNEOUS
Core: 22 Sample Midpoint(m) : 185.89 Sect/Pc #: 3/PCE 4
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): 0.5-2 Morphology: SUBHEDRAL-EUHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 5%)
Size(mm): 1-2 Morphology: SUBHEDRAL,LATHS
FRESH,OFTEN ZONED;
CLINOPYROXENE ( TR%)
Size(mm): 0.2-0.4 Morphology: ANHEDRAL
INTERGROWN WITH PLAG,FRESH,2VZ=40*
Groundmass - OLIVINE ( 1%)
Size(mm): 0.05-0.1 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 20%)
Size(mm): 0.2-0.5 Morphology: ACICULAR
FRESH;
CLINOPYROXENE ( 40%)
Morphology: SHEAVES
POORLY CRYSTALLIZED SHEAVES,FRESH;
OPAQUE MINERALS ( 2-3%)
Morphology: GRANULES
PROBABLY MAGN,MINUTE GRANULES;
MICROCRYST GROUNDMASS ( 30%)
MESOSTASIS,FRESH*
Alteration - SMECTITE
Replacing: OL
Vesicles -
Size(mm): 0.5
Percent: <1
Shape: ROUND
SEGREGATION TYPE*
Leg : 65 Top/Bottom Interval(mm): 350/ 380 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 182.50 Rock Type: IGNEOUS
Core: 22 Sample Midpoint(m) : 187.37 Sect/Pc #: 4/PCE 2B
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): 0.3-3 Morphology: SUBHEDRAL-EUHEDRAL
REPLACED BY SMEC + MINOR CARB + SOME ?PYRITE;
PLAGIOCLASE ( 8-10%)
Size(mm): 0.5-2.5 Morphology: SUBHEDRAL
STRONGLY ZONED,FRESH;
CLINOPYROXENE ( <1%)
Size(mm): 1-1.5 Morphology: ROUNDED
FRESH*
Groundmass - OLIVINE ( 1-2%)
Size(mm): 0.05-0.1 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE (20-25%)
Size(mm): 0.1-0.5 Morphology: ACICULAR
SERIATE,OFTEN ACICULAR,SOME IN VARIOLITIC
CLUSTERS,FRESH;
CLINOPYROXENE ( 60%)
Morphology: RADIATING SHEAVES
POORLY CRYSTALLIZED,FRESH;
OPAQUE MINERALS ( 2-4%)
Size(mm): TO 0.1 Morphology: GRAINS,LATHS
MINUTE GRAINS,SOME LATHS TO 0.1 MM*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL REPLACED BY SMEC + MINOR CARB;
CARBONATE
Replacing: OL
OL REPLACED BY SMEC + MINOR CARB*
Vesicles -
Size(mm): 0.5
Percent: TR
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 1080/1100 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 187.00 Rock Type: IGNEOUS
Core: 23 Sample Midpoint(m) : 188.09 Sect/Pc #: 1/PCE 8E
ROCK = PLAG-OL-CPX MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,INTERGRANULAR-
INTERSERTAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): 1.0-1.6 Morphology: SUBHEDRAL
PARTLY REPLACED BY SMEC;
PLAGIOCLASE ( 5%)
Size(mm): 0.5-3 Morphology: SUBHEDRAL
FRESH,STRONGLY ZONED;
CLINOPYROXENE ( 1%)
Size(mm): 0.5-1.5 Morphology: ROUND
FRESH,ZONED,2VZ=45*
Groundmass - OLIVINE ( 2-3%)
Size(mm): 0.05-0.15 Morphology: SUBHEDRAL
MOSTLY REPLACED BY SMEC;
PLAGIOCLASE ( 45%)
Size(mm): 0.1-0.5 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE ( 35%)
Size(mm): 0.1-0.3 Morphology: ANHEDRAL
FRESH,2VZ=40;
OPAQUE MINERALS ( 2-3%)
Size(mm): 0.01-0.05 Morphology: ANHEDRAL
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 5-7%)
INTERSTITIAL MATERIAL,MOSTLY GLASSY,SLIGHTLY
REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + MINOR INTERSTITIAL MATERIAL PARTLY REPLACED
BY SMEC*
Vesicles -
Size(mm): 0.5
Percent: TR
Filling: SMEC,CARB
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 1360/1380 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 187.00 Rock Type: IGNEOUS
Core: 23 Sample Midpoint(m) : 188.37 Sect/Pc #: 1/PCE 8B
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,MEDIUM-GRAINED,
INTERGRANULAR-INTERSERTAL*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 2-6 Morphology: SUBHEDRAL
PARTLY REPLACED BY SMEC,MOSTLY FRESH,2VX=88;
PLAGIOCLASE ( 5-7%)
Size(mm): 1-2 Morphology: SUBHEDRAL
FRESH,OFTEN IN CLUSTERS WITH OL*
Groundmass - OLIVINE ( 3%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL
MOSTLY REPLACED BY SMEC;
PLAGIOCLASE ( 45%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE ( 35%)
Size(mm): 0.1-0.4 Morphology: ANHEDRAL
FRESH,2VZ=45;
OPAQUE MINERALS ( 1-2%)
Morphology: GRANULES
MINUTE GRANULES,IN INTERSTITIAL PATCHES;
MICROCRYST GROUNDMASS ( 5-10%)
INTERSTITIAL MATERIAL,MOSTLY GLASSY,FRESH*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL PARTLY REPLACED BY SMEC;
CARBONATE
Location: VESICLES
VESICLES FILLED WITH SMEC + CARB*
Vesicles -
Size(mm): 0.5
Percent: TR
Filling: SMEC,CARB
Shape: ROUND-
Shape: IRREGULAR
Leg : 65 Top/Bottom Interval(mm): 360/ 390 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 187.00 Rock Type: IGNEOUS
Core: 23 Sample Midpoint(m) : 188.88 Sect/Pc #: 2/PCE 2
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,INTERSERTAL;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 1-2%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL
RESORBED,REPLACED BY SMEC;
PLAGIOCLASE ( 5-7%)
Size(mm): 1-2 Morphology: SUBHEDRAL
FRESH,STRONGLY ZONED,USUALLY IN GLOMEROCRYSTS;
CLINOPYROXENE ( <1%)
Size(mm): 1-1.5 Morphology: SUBHEDRAL
FRESH,IN CLUSTERS WITH PLAG,2VZ=45*
Groundmass - OLIVINE ( 1-2%)
Size(mm): 0.1-0.2 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 40%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE ( 40%)
Size(mm): 0.05-0.2 Morphology: SUBHEDRAL-ANHEDRAL
FRESH,2VZ=40;
OPAQUE MINERALS ( 2-3%)
Morphology: GRANULES
MINUTE GRANULES,IN INTERSTITIAL PATCHES;
MICROCRYST GROUNDMASS ( 10%)
INTERSTITIAL MATERIAL,MOSTLY GLASSY,FRESH*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
Vesicles -
Size(mm): 0.3-1
Percent: 1-2
Filling: SMEC
Shape: ROUND-
Shape: IRREGULAR
SOME WITH SEGREGATION PATCHES*
Leg : 65 Top/Bottom Interval(mm): 1260/1280 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 187.00 Rock Type: IGNEOUS
Core: 23 Sample Midpoint(m) : 189.77 Sect/Pc #: 2/PCE 8B
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 1-2%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL
ALTERED TO SMEC;
PLAGIOCLASE ( 5%)
Size(mm): 0.5-1.5 Morphology: SUBHEDRAL
FRESH*
Groundmass - MICROCRYST GROUNDMASS (90-95%)
Morphology: SHEAF-LIKE
POORLY CRYSTALLIZED QUENCH MIXTURE WITH SOME
SHEAF-LIKE STRUCTURE*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
Vesicles -
Size(mm): 0.5-1
Percent: <1
Filling: SMEC,EMPTY
Shape: ROUND
OPEN OR FILLED WITH SMEC,SOME WITH SEGREGATION
PATCHES*
Leg : 65 Top/Bottom Interval(mm): 580/ 600 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 191.50 Rock Type: IGNEOUS
Core: 24 Sample Midpoint(m) : 193.59 Sect/Pc #: 2/PCE 1E
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC,MEDIUM-GRAINED,
INTERGRANULAR-INTERSERTAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 1-2%)
Size(mm): 1-2 Morphology: SUBHEDRAL
FRESH,SOMEWHAT ZONED*
Groundmass - OLIVINE ( 3-5%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE (45-50%)
Size(mm): 0.2-0.7 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE (25-30%)
Size(mm): 0.05-0.15 Morphology: ANHEDRAL
FRESH,2VZ=40;
OPAQUE MINERALS ( 5%)
Size(mm): 0.005-0.1 Morphology: GRANULAR
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 7-8%)
INTERSTITIAL MATERIAL,POORLY CRYSTALLIZED,PARTLY
REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL Replacing: OL
OL + SOME INTERSTITIAL MATERIAL REPLACED BY SMEC
+ TRACES OF CARB;
CARBONATE
Location: INTERSTITIAL Replacing: OL
OL + SOME INTERSTITIAL MATERIAL REPLACED BY SMEC
+ TRACES OF CARB*
Leg : 65 Top/Bottom Interval(mm): 30/ 50 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 196.00 Rock Type: IGNEOUS
Core: 25 Sample Midpoint(m) : 196.04 Sect/Pc #: 1/PCE 1
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,FINE-GRAINED,
INTERGRANULAR-INTERSERTAL;
Where sampled: NEXT TO GLASSY MARGIN
WHERE SAMPLED IS QUESTIONABLE*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL
PARTLY REPLACED BY SMEC,SOME FRESH,2VX=85;
PLAGIOCLASE ( 5-7%)
Size(mm): 0.5-3 Morphology: SUBHEDRAL
STRONGLY ZONED,OFTEN IN GLOMEROCRYSTS*
Groundmass - OLIVINE ( 2-3%)
Size(mm): 0.05-0.2 Morphology: SUBHEDRAL
ALTERED TO SMEC;
PLAGIOCLASE ( 45%)
Size(mm): 0.1-0.4 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE (35-40%)
Size(mm): 0.1-0.3 Morphology: ANHEDRAL
FRESH,2VZ=40;
OPAQUE MINERALS ( 3-4%)
Size(mm): 0.05-0.2 Morphology: SUBHEDRAL
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 5-6%)
INTERSTITIAL MATERIAL,GLASSY TO MICROXLN PATCHES,
MOSTLY ALTERED TO SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + INTERSTITIAL MATERIAL PARTLY ALTERED TO SMEC;
CARBONATE
Location: VESICLES
VESICLES FILLED WITH SMEC + MINOR CARB*
Vesicles -
Size(mm): 0.2-0.5
Percent: 1-2
Filling: SMEC,CARB
Shape: ROUND
FILLED WITH SMEC + MINOR CARB*
Leg : 65 Top/Bottom Interval(mm): 670/ 690 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 196.00 Rock Type: IGNEOUS
Core: 25 Sample Midpoint(m) : 196.68 Sect/Pc #: 1/PCE 7
ROCK = APHYRIC BASALT
POOR SLIDE--THINLY GROUND AND PARTLY DESTROYED;
Texture: APHYRIC,COARSE-GRAINED,OPHIMOTTLED;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 5-8%)
Size(mm): 0.1-0.5 Morphology: SUBHEDRAL
REPLACED BY SMEC + MINOR CARB;
PLAGIOCLASE ( 30%)
Size(mm): 0.5-2.5 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 25%)
Size(mm): 0.5-1 Morphology: ANHEDRAL
IN OPHITIC CLOTS WITH PLAG,2VZ=35,FRESH;
OPAQUE MINERALS ( 2-3%)
Size(mm): 0.05-0.1 Morphology: SUBHEDRAL
PROBABLY MAGN;
MICROCRYST GROUNDMASS (30-35%)
INTERSTITIAL MATERIAL,MICROXLN MIXTURE OF OP.MINS
+ PYX + APATITE,PARTLY REPLACED BY SMEC;
APATITE
INTERSTITIAL,MICROXLN*
Alteration - SMECTITE
Location: INTERSTITIAL Replacing: OL
OL + INTERSTITIAL MATERIAL REPLACED BY SMEC +
MINOR CARB;
CARBONATE
Location: INTERSTITIAL Replacing: OL
OL + INTERSTITIAL MATERIAL REPLACED BY SMEC +
MINOR CARB*
Vesicles -
Size(mm): .05-1
Percent: <1
Filling: SMEC,CHLORITE
Shape: ROUND-OVAL
Leg : 65 Top/Bottom Interval(mm): 200/ 210 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 200.00 Rock Type: IGNEOUS
Core: 26 Sample Midpoint(m) : 200.21 Sect/Pc #: 1/PCE 1A
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,FINE- TO MEDIUM-GRAINED,
INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.4-0.7 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 3-4%)
Size(mm): 0.7-1.5 Morphology: SUBHEDRAL
FRESH*
Groundmass - OLIVINE ( 1-2%)
Size(mm): 0.05-0.2 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE (45-50%)
Size(mm): 0.1-0.6 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE (40-45%)
Size(mm): 0.05-0.2 Morphology: GRANULAR
FRESH,2VZ=40;
OPAQUE MINERALS ( 3%)
Size(mm): 0.05-0.1 Morphology: SUBHEDRAL
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 5%)
INTERSTITIAL MATERIAL,PARTLY REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL Replacing: OL
OL + SOME INTERSTITIAL MATERIAL REPLACED BY SMEC,
A FEW HAIRLINE CRACKS FILLED WITH SMEC*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 1000/1010 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 200.00 Rock Type: IGNEOUS
Core: 26 Sample Midpoint(m) : 201.01 Sect/Pc #: 1/PCE 9C
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC,FINE-GRAINED,INTERGRANULAR-
INTERSERTAL*
Phenocrysts- PLAGIOCLASE ( 1-2%)
Size(mm): 1-3 Morphology: SUBHEDRAL
SOME CORRODED + FRESH*
Groundmass - OLIVINE ( 2-3%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL
REPLACED BY SMEC + MINOR CARB;
PLAGIOCLASE (55-60%)
Size(mm): 0.1-1.5 Morphology: ACICULAR
SERIATE,SOME VARIOLITIC CLUSTERS;
CLINOPYROXENE ( 25%)
Size(mm): 0.005-0.2 Morphology: GRANULAR-PRISMATIC
FRESH,2VZ=45;
OPAQUE MINERALS ( 3-5%)
MINUTE XTLS,PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 7-8%)
INTERSTITIAL MATERIAL,MOSTLY REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + INTERSTITIAL MATERIAL REPLACED BY SMEC +
CARB;
CARBONATE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + INTERSTITIAL MATERIAL REPLACED BY SMEC +
CARB;
PYRITE
Location: VESICLES
VESICLES ARE FILLED WITH SMEC + CARB + MINOR
PYRITE*
Vesicles -
Percent: 1-2
Location: 0.3-0.5
Filling: SMEC,CARB,
Shape: ROUND
Filling: PYRITE
FILLED WITH SMEC + CARB + MINOR PYRITE*
Leg : 65 Top/Bottom Interval(mm): 170/ 190 Describer: Robinson, P.
Hole: 483 Top of Core Depth(m) : 200.00 Rock Type: IGNEOUS
Core: 26 Sample Midpoint(m) : 203.18 Sect/Pc #: 3/PCE 2
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC,FINE- TO MEDIUM-GRAINED,
INTERGRANULAR-INTERSERTAL*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 1-1.2 Morphology: SUBHEDRAL
FRESH,OFTEN ZONED*
Groundmass - OLIVINE ( 2-3%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 45%)
Size(mm): 0.2-1 Morphology: SUBHEDRAL
FRESH,SOMEWHAT ZONED;
CLINOPYROXENE ( 40%)
Size(mm): 0.05-0.3 Morphology: ANHEDRAL
FRESH,2VZ=40;
OPAQUE MINERALS ( 3-4%)
Size(mm): 0.05-0.1 Morphology: SUBHEDRAL
PROBABLY MAGN;
MICROCRYST GROUNDMASS (10-15%)
INTERSTITIAL MATERIAL,PARTLY REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + MOST INTERSTITIAL MATERIAL REPLACED BY SMEC*
Vesicles -
Size(mm): <1
Percent: <1
Filling: SMEC
Shape: ROUND
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