Leg : 65 Top/Bottom Interval(mm): 140/ 160 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 129.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 138.65 Sect/Pc #: 7/PCE 2
ROCK = APHYRIC BASALT;
Texture: APHYRIC,FINE-GRAINED,INTERSERTAL-QUENCH
ABRUPT CHANGE IN GRAIN SIZE IN SLIDE;
Where sampled: OTHER
FINE-GRAINED BASEMENT-SEDIMENT CONTACT (GLASSY)*
Groundmass - OLIVINE ( 1%)
Size(mm): 0.05-0.1 Morphology: SUBHEDRAL
ALTERED TO SMEC;
PLAGIOCLASE ( 5%)
Size(mm): 0.2-1 Morphology: SUBHEDRAL,LATHS
FRESH;
AUGITE ( 1-2%)
Size(mm): 0.1-0.4 Morphology: SUBHEDRAL-ANHEDRAL
SOMETIMES INTERGROWN WITH PLAG,FRESH;
MAGNETITE ( 3-4%)
MINUTE GRANULES;
CRYPTOCRYSTALLINE (85-90%)
INTERSTITIAL MATERIAL*
Alteration - SMECTITE
Location: VESICLES, Replacing: OL,AUGITE,PLAG
Location: VEINS
OL COMPLETELY ALTERED,AUGITE + PLAG PARTLY
ALTERED,VESICLES FILLED WITH BROWN SMEC;
CARBONATE
Location: VEINS
1-2 MM WIDE VEINS FILLED WITH SMEC + CARB + PYRITE
AND SURROUNDED BY NARROW ALTERATION HALOS;
PYRITE
Location: VEINS
Vesicles -
Size(mm): .05-.25
Percent: 1
Filling: SMEC
Shape: ROUND
FILLED WITH BROWN SMEC*
Leg : 65 Top/Bottom Interval(mm): 230/ 250 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 137.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 137.24 Sect/Pc #: 1/PCE 2B
ROCK = APHYRIC BASALT;
Texture: APHYRIC,FINE-GRAINED,INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 1-2%)
Size(mm): TO 0.3 Morphology: SUBHEDRAL
ALTERED TO SMEC;
PLAGIOCLASE ( 55%)
Size(mm): 0.2-0.5 Morphology: EUHEDRAL-SUBHEDRAL,LATHS
FRESH;
AUGITE ( 40%)
Size(mm): 0.2-0.4 Morphology: ANHEDRAL
FRESH;
MAGNETITE ( 3%)
Size(mm): 0.01-0.05 Morphology: SUBHEDRAL
Alteration - SMECTITE
Location: VESICLES, Replacing: OL
Location: INTERSTITIAL
OL COMPLETELY ALTERED TO SMEC OR CALCITE,SOME
SMALL INTERSTITIAL PATCHES OF SMEC PROBABLY
REPRESENT ALTERED INTERSTITIAL MATERIAL*
Vesicles -
Size(mm): 1-2
Percent: 1-2
Filling: SMEC,CALCITE
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 560/ 590 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 137.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 137.58 Sect/Pc #: 1/PCE 2G
ROCK = APHYRIC BASALT;
Texture: APHYRIC,FINE-GRAINED,INTERSERTAL-INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 3-5%)
Size(mm): 0.3 Morphology: SUBHEDRAL
REPLACED WITH SMEC;
PLAGIOCLASE ( 45%)
Size(mm): 0.2-0.5 Morphology: EUHEDRAL-SUBHEDRAL,LATHS
FRESH;
AUGITE ( 35%)
Size(mm): 0.2-0.4 Morphology: ANHEDRAL
2VZ=45,FRESH;
MAGNETITE ( 2-3%)
Size(mm): 0.05-0.2 Morphology: EUHEDRAL-SUBHEDRAL
MICROCRYST GROUNDMASS (10-12%)
IRREGULARLY DISTRIBUTED,PARTLY REPLACED BY SMEC*
Alteration - SMECTITE
Location: VESICLES, Replacing: OL
Location: VEINS,
Location: INTERSTITIAL
OL + MOST INTERSTITIAL MATERIAL REPLACED BY
YELLOWISH-BROWN SMEC,BROWN SMEC IN VESICLES;
CALCITE
Location: VESICLES,
Location: VEINS
1-2 MM WIDE VEINS FILLED WITH CALCITE + MINOR SMEC
AND PYRITE,MINOR CALCITE IN VESICLES;
PYRITE
Location: VEINS
Vesicles -
Size(mm): 1-2
Percent: 2
Filling: SMEC,CALCITE
Shape: ROUND
FILLED WITH BROWN SMEC + MINOR CALCITE*
Leg : 65 Top/Bottom Interval(mm): 350/ 370 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 137.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 138.86 Sect/Pc #: 2/PCE 5A
ROCK = APHYRIC BASALT;
Texture: APHYRIC,FINE-GRAINED,INTERSERTAL-INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 2-3%)
Size(mm): 0.3 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 45%)
Size(mm): 0.2-0.5 Morphology: ANHEDRAL-SUBHEDRAL,LATHS
AUGITE ( 40%)
Size(mm): 0.2-0.4 Morphology: ANHEDRAL
2VZ=45,FRESH;
MAGNETITE ( 2-3%)
Size(mm): 0.01-0.05 Morphology: SUBHEDRAL
CRYPTOCRYSTALLINE ( 10%)
INTERSTITIAL MATERIAL*
Alteration - SMECTITE
Location: VESICLES, Replacing: OL
Location: INTERSTITIAL
OL REPLACED BY BROWN SMEC + CALCITE,INTERSTITIAL
MATERIAL PARTLY REPLACED BY BROWN SMEC;
CARBONATE
Location: VESICLES
MINOR;
SILICA ( TR%)
Location: VESICLES
IDENTITY QUESTIONABLE*
Vesicles -
Size(mm): 1-3
Percent: 1-3
Filling: SMEC,CARB,
Shape: ROUND
Filling: SILICA
FILLED WITH BROWN SMEC + MINOR CARB + TRACES OF
?SILICA*
Leg : 65 Top/Bottom Interval(mm): 600/ 620 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 139.00 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 139.61 Sect/Pc #: 1/PCE 8
ROCK = APHYRIC BASALT;
Texture: APHYRIC,FINE-GRAINED,INTERSERTAL-INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 3-5%)
Size(mm): TO 0.3 Morphology: SUBHEDRAL-EUHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 35%)
Size(mm): 0.1-0.6 Morphology: SUBHEDRAL,LATHS
FRESH;
AUGITE ( 45%)
Size(mm): 0.2-0.4 Morphology: ANHEDRAL
2VZ=45,SOME SUBOPHITIC PATCHES,FRESH;
MAGNETITE ( 3-4%)
Size(mm): 0.05-0.2 Morphology: GRANULAR-ACICULAR
MOSTLY IN INTERSTITIAL PATCHES;
CRYPTOCRYSTALLINE (10-15%)
INTERSTITIAL MATERIAL*
Alteration - SMECTITE
Location: VESICLES, Replacing: OL
Location: INTERSTITIAL
OL + SOME INTERSTITIAL MATERIAL REPLACED BY BROWN
SMEC;
CALCITE
Location: VESICLES
VESICLES FILLED WITH BROWN SMEC + MINOR CALCITE*
Vesicles -
Size(mm): TO 1
Percent: <1
Filling: SMEC,CALCITE
Shape: ROUND
FILLED WITH BROWN SMEC + MINOR CALCITE*
Leg : 65 Top/Bottom Interval(mm): 1350/1370 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 139.00 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 141.86 Sect/Pc #: 2/PCE 8C
ROCK = APHYRIC BASALT;
Texture: APHYRIC,FINE-GRAINED,INTERGRANULAR-INTERSERTAL*
Groundmass - OLIVINE ( 3-4%)
Size(mm): 0.2-0.3 Morphology: SUBHEDRAL-EUHEDRAL
PLAGIOCLASE ( 45%)
Size(mm): 0.2-1.5 Morphology: SUBHEDRAL,LATHS
FRESH;
AUGITE ( 35%)
Size(mm): 0.1-0.5 Morphology: ANHEDRAL
2VZ=45,FRESH;
MAGNETITE ( 3-4%)
Size(mm): 0.05-0.1 Morphology: SQUARE-ACICULAR
MOSTLY IN INTERSTITIAL PATCHES;
CRYPTOCRYSTALLINE (10-12%)
INTERSTITIAL MATERIAL,PARTLY REPLACED BY SMEC*
Alteration - SMECTITE
Location: VESICLES, Replacing: OL
Location: INTERSTITIAL
OL + SOME INTERSTITIAL MATERIAL REPLACED BY DARK
BROWN SMEC;
CARBONATE
Location: VESICLES
VESICLES FILLED WITH SMEC + MINOR CARB*
Vesicles -
Size(mm): TO 0.2
Percent: <1
Filling: SMEC,CARB
Shape: ROUND
FILLED WITH BROWN SMEC + MINOR CARB*
Leg : 65 Top/Bottom Interval(mm): 930/ 950 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 144.00 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 144.94 Sect/Pc #: 1/PCE 6A
ROCK = APHYRIC BASALT;
Texture: APHYRIC,FINE-GRAINED,INTERGRANULAR-INTERSERTAL*
Phenocrysts- PLAGIOCLASE ( TR%)
Size(mm): 1-2 Morphology: SUBHEDRAL
SLIGHTLY CORRODED*
Groundmass - OLIVINE ( 3-4%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL
PLAGIOCLASE ( 45%)
Size(mm): 0.2-1.5 Morphology: SUBHEDRAL,LATHS
FRESH;
AUGITE ( 35%)
Size(mm): 0.1-0.5 Morphology: ANHEDRAL
2VZ=45;
MAGNETITE ( 5%)
Size(mm): 0.05-0.2 Morphology: SQUARE-LATH SHAPED,
MOSTLY IN INTERSTITIAL PATCHES;
CRYPTOCRYSTALLINE (10-12%)
INTERSTITIAL MATERIAL,PARTLY ALTERED TO SMEC*
Alteration - SMECTITE
Location: VESICLES, Replacing: OL
Location: INTERSTITIAL
OL COMPLETELY ALTERED + INTERSTITIAL MATERIAL
PARTLY ALTERED TO BROWN SMEC;
CARBONATE
Location: VESICLES
VESICLES RIMMED WITH BROWN SMEC AND FILLED WITH
CARB*
Vesicles -
Size(mm): 0.5
Percent: 1
Filling: SMEC,CARB
RIMMED WITH BROWN SMEC AND FILLED WITH CARB*
Leg : 65 Top/Bottom Interval(mm): 150/ 170 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 157.00 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 157.16 Sect/Pc #: 1/PCE 3
ROCK = APHYRIC BASALT;
Texture: APHYRIC,FINE-GRAINED,INTERSERTAL-QUENCH*
Groundmass - OLIVINE (10-15%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL-EUHEDRAL
2VZ=90,PARTLY ALTERED TO SMEC;
PLAGIOCLASE ( 45%)
Size(mm): 0.2-0.8 Morphology: SUBHEDRAL,LATHS
FRESH;
AUGITE (25-30%)
Size(mm): 0.2-0.5 Morphology: RADIATING CLUSTERS
POORLY CRYSTALLIZED,2VZ=50;
MAGNETITE ( 7-8%)
PATCHES;
MICROCRYST GROUNDMASS ( 5-7%)
GLASSY MESOSTASIS,DARK INTERSTITIAL MATERIAL,
PARTLY REPLACED BY SMEC*
Alteration - SMECTITE
Location: VESICLES, Replacing: OL
Location: INTERSTITIAL
OL + INTERSTITIAL MATERIAL PARTLY REPLACED BY
BROWN SMEC*
Vesicles -
Size(mm): 0.1-0.3
Percent: <1
Filling: SMEC
Shape: ROUND
FILLED WITH BROWN SMEC*
Leg : 65 Top/Bottom Interval(mm): 1230/1250 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 157.00 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 158.24 Sect/Pc #: 1/PCE 15B
ROCK = PLAG-AUGITE MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH*
Phenocrysts- PLAGIOCLASE ( 5-6%)
Size(mm): 0.5-2 Morphology: SUBHEDRAL
STRONGLY ZONED,USUALLY IN GLOMEROPHYRIC CLUSTERS
WITH AUGITE;
AUGITE ( 2-3%)
Size(mm): 0.2-0.5 Morphology: ANHEDRAL
USUALLY INTERGROWN WITH PLAG,2VZ=45*
Groundmass - OLIVINE ( 2-3%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL
ALTERED TO SMEC;
PLAGIOCLASE (10-15%)
Size(mm): 0.2-0.5 Morphology: ACICULAR
MAGNETITE ( 3-4%)
Morphology: GRANULES
MINUTE GRANULES;
MICROCRYST GROUNDMASS (80-85%)
QUENCH MATRIX,INCIPIENTLY CRYSTALLIZED TO CPX,
MINOR REPLACEMENT BY SMEC;
CLINOPYROXENE
QUENCH MATRIX INCIPIENTLY CRYSTALLIZED TO CPX*
Alteration - SMECTITE
Location: MATRIX Replacing: OL
OL + MINOR MATRIX MATERIAL REPLACED BY YELLOWISH-
BROWN SMEC*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 380/ 400 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 157.00 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 158.89 Sect/Pc #: 2/PCE 4
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,INTERSERTAL-QUENCH*
Phenocrysts- PLAGIOCLASE ( 3%)
Size(mm): 0.5-2 Morphology: SUBHEDRAL
SOMETIMES IN SMALL GLOMEROPHYRIC CLUSTERS*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.2-0.5 Morphology: EUHEDRAL-SUBHEDRAL
ALTERED TO SMEC;
PLAGIOCLASE ( 40%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL,LATHS
FRESH;
AUGITE (45-50%)
Size(mm): TO 0.2 Morphology: SHEAVES
USUALLY IN POORLY CRYSTALLIZED SHEAVES;
MAGNETITE ( 3-5%)
Morphology: GRANULES
MINUTE GRANULES;
GLASS ( 5%)
MOSTLY DEVITRIFIED OR REPLACED BY SMEC,IN
INTERSTITIAL PATCHES*
Alteration - SMECTITE
Location: VESICLES, Replacing: OL
Location: INTERSTITIAL
OL + MINOR INTERSTITIAL MATERIAL REPLACED BY SMEC*
Vesicles -
Size(mm): 0.3-0.5
Percent: <1
Filling: SMEC
Shape: ROUND
FILLED WITH BROWN SMEC*
Leg : 65 Top/Bottom Interval(mm): 1150/1170 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 157.00 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 161.16 Sect/Pc #: 3/PCE 10
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC,MEDIUM-GRAINED,INTERSERTAL-
SUBOPHITIC*
Phenocrysts- PLAGIOCLASE ( 1-2%)
Size(mm): 1-2 Morphology: SUBHEDRAL,LATHS
SOME CLUSTERS TO 3 MM,FRESH*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.2-0.6 Morphology: SUBHEDRAL-EUHEDRAL
ALTERED TO SMEC;
PLAGIOCLASE ( 55%)
Size(mm): 0.3-1 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 30%)
Size(mm): 0.3-0.5 Morphology: ANHEDRAL
FRESH,2VZ=45;
MAGNETITE ( 3-4%)
Morphology: GRANULES
MINUTE GRANULES IN INTERSTITIAL AREAS;
GLASS ( 5%)
DEVITRIFIED,INTERSTITIAL MATERIAL,PARTLY REPLACED
BY SMEC*
Alteration - SMECTITE
Location: VESICLES Replacing: OL,GLASS
OL + MINOR GLASS REPLACED BY BROWN SMEC*
Vesicles -
Size(mm): 0.2-0.5
Percent: 1
Filling: SMEC
Shape: ROUND
FILLED WITH BROWN SMEC*
Leg : 65 Top/Bottom Interval(mm): 270/ 300 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 166.00 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 166.29 Sect/Pc #: 1/PCE 3A
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC,FINE-GRAINED,INTERSERTAL-
INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 1-2 Morphology: SUBHEDRAL
SOME GLOMEROPHYRIC CLOTS*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.2-0.5 Morphology: EUHEDRAL-SUBHEDRAL
ALTERED TO SMEC;
PLAGIOCLASE ( 50%)
Size(mm): 0.2-1 Morphology: SUBHEDRAL,LATHS
FRESH;
AUGITE ( 30%)
Size(mm): 0.1-0.3 Morphology: ANHEDRAL
FRESH,2VZ=45;
MAGNETITE ( 5%)
Size(mm): 0.05-0.5 Morphology: SUBHEDRAL,LATHS
SOME LATHS,MOSTLY IN INTERSTITIAL AREAS;
CRYPTOCRYSTALLINE ( 10%)
INTERSTITIAL MATERIAL,PARTLY REPLACED BY SMEC*
Alteration - SMECTITE
Location: VESICLES, Replacing: OL
Location: INTERSTITIAL
OL + SOME INTERSTITIAL MATERIAL REPLACED BY BROWN
SMEC*
Vesicles -
Size(mm): 0.2-0.4
Percent: 1
Filling: SMEC
Shape: ROUND
FILLED WITH BROWN SMEC*
Leg : 65 Top/Bottom Interval(mm): 880/ 910 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 166.00 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 168.39 Sect/Pc #: 2/PCE 5
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC,MEDIUM-GRAINED,
INTERGRANULAR-SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 1-2 Morphology: SUBHEDRAL,LATHS
FRESH,SOME GLOMEROPHYRIC CLUSTERS*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.4-0.8 Morphology: SUBHEDRAL-EUHEDRAL
ALTERED TO SMEC;
PLAGIOCLASE ( 60%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL
FRESH,2VZ=45;
MAGNETITE ( 3-5%)
Size(mm): 0.1-0.4 Morphology: SUBHEDRAL
MOSTLY IN INTERSTITIAL AREAS;
QUARTZ ( TR%)
IN INTERSTITIAL MATERIAL;
CRYPTOCRYSTALLINE ( 1-2%)
INTERSTITIAL MATERIAL WITH TRACES OF QUARTZ,PARTLY
ALTERED TO SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL Replacing: OL
OL + MINOR INTERSTITIAL MATERIAL REPLACED BY
GREENISH-BROWN SMEC*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 540/ 550 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 166.00 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 171.05 Sect/Pc #: 4/PCE 3
ROCK = APHYRIC BASALT;
Texture: APHYRIC,MEDIUM-GRAINED,INTERGRANULAR-SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.3-0.6 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 60%)
Size(mm): 0.5-2 Morphology: SUBHEDRAL,LATHS
SOME STRONGLY ZONED,FRESH;
AUGITE ( 30%)
Size(mm): 0.5-1 Morphology: ANHEDRAL
FRESH,2VZ=45;
MAGNETITE ( 3-5%)
Size(mm): 0.1-0.5 Morphology: SUBHEDRAL
QUARTZ ( TR%)
IN INTERSTITIAL MATERIAL;
CRYPTOCRYSTALLINE ( 1-2%)
INTERSTITIAL MATERIAL WITH TRACES OF QUARTZ,
MOSTLY REPLACED BY SMEC*
Alteration - SMECTITE
Location: VESICLES, Replacing: OL
Location: INTERSTITIAL
OL REPLACED BY GREENISH-BROWN SMEC,INTERSTITIAL
MATERIAL PARTLY REPLACED SMEC + MINOR CARB;
CARBONATE
Location: INTERSTITIAL
INTERSTITIAL MATERIAL PARTLY REPLACED SMEC + MINOR
CARB*
Vesicles -
Size(mm): 0.4-0.8
Percent: <1
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 990/1010 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 184.00 Rock Type: IGNEOUS
Core: 18 Sample Midpoint(m) : 186.50 Sect/Pc #: 2/PCE 11
ROCK = APHYRIC BASALT;
Texture: APHYRIC,FINE- TO MEDIUM-GRAINED,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): 1-2 Morphology: SUBHEDRAL,LATHS
FRESH*
Groundmass - OLIVINE ( 2-3%)
Size(mm): 0.2-0.3 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 50%)
Size(mm): 0.2-0.6 Morphology: SUBHEDRAL
FRESH;
AUGITE ( 30%)
Size(mm): 0.1-0.3 Morphology: ANHEDRAL
FRESH,2VZ=45;
MAGNETITE ( 3%)
Size(mm): 0.05-0.1 Morphology: SKELETAL
MICROCRYST GROUNDMASS (10-12%)
INTERSTITIAL MATERIAL,REPLACED BY BROWNISH-GREEN
SMEC*
Alteration - SMECTITE
Location: VESICLES, Replacing: OL
Location: INTERSTITIAL
OL + INTERSTITIAL MATERIAL REPLACED BY GREENISH-
BROWN SMEC*
Vesicles -
Size(mm): 0.3-0.5
Percent: <1
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 960/1000 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 193.00 Rock Type: IGNEOUS
Core: 19 Sample Midpoint(m) : 193.98 Sect/Pc #: 1/PCE 9
ROCK = APHYRIC BASALT;
Texture: APHYRIC,FINE-GRAINED,INTERSERTAL;
Where sampled: OTHER
NEAR TOP OF COOLING UNIT IX*
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): 0.1-2 Morphology: SUBHEDRAL,LATHS
PARTLY REPLACED BY SMEC;
AUGITE ( 20%)
Size(mm): 0.2-0.4 Morphology: ANHEDRAL
2VZ=45,PARTLY REPLACED BY SMEC;
MICROCRYST GROUNDMASS ( 25%)
INTERSTITIAL MATERIAL,MOSTLY GLASSY,MOSTLY
REPLACED BY SMEC,MINOR INTERSTITIAL QUARTZ AND
APATITE;
QUARTZ
MINOR,INTERSTITIAL;
APATITE
MINOR,INTERSTITIAL*
Alteration - SMECTITE
Location: INTERSTITIAL Replacing: PLAG,AUGITE
EXTENSIVE REPLACEMENT OF PLAG + AUGITE +
INTERSTITIAL MATERIAL BY GREENISH-BROWN SMEC*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 620/ 640 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 197.50 Rock Type: IGNEOUS
Core: 20 Sample Midpoint(m) : 198.13 Sect/Pc #: 1/PCE 7
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC,VERY FINE-GRAINED,
INTERSERTAL-QUENCH*
Phenocrysts- PLAGIOCLASE ( 1-2%)
Size(mm): 1-3 Morphology: SUBHEDRAL
HIGHLY ZONED,SOME GLOMEROPHYRIC CLOTS,FRESH*
Groundmass - OLIVINE ( 2%)
Size(mm): 0.3-1 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 25%)
Size(mm): 0.5-0.8 Morphology: SUBHEDRAL,LATHS
FRESH;
AUGITE ( 20%)
Size(mm): 0.2-0.5 Morphology: ANHEDRAL
FRESH,INTERGROWN WITH PLAG;
MAGNETITE ( 2%)
Morphology: GRANULES
MINUTE GRANULES IN MATRIX;
CRYPTOCRYSTALLINE ( 50%)
POORLY CRYSTALLIZED CPX,MOSTLY FRESH*
Alteration - SMECTITE
Location: VESICLES, Replacing: OL
Location: FRACTURE
OL REPLACED BY BROWN SMEC;
PYRITE
Location: FRACTURE
1 HAIRLINE FILLED WITH SMEC + PYRITE*
Vesicles -
Size(mm): 0.2-0.3
Percent: <1
Filling: SMEC,CARB
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 250/ 260 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 197.50 Rock Type: IGNEOUS
Core: 20 Sample Midpoint(m) : 200.76 Sect/Pc #: 3/PCE 3
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC,FINE-GRAINED,INTERSERTAL-
INTERGRANULAR;
Where sampled: FLOW INTERIOR
CENTER OF ALTERED UNIT I*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 1-4 Morphology: SUBHEDRAL
HIGHLY ZONED,FRESH*
Groundmass - OLIVINE ( 3-5%)
Size(mm): 0.2-0.8 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 60%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL,LATHS
SLIGHT REPLACEMENT BY SMEC;
AUGITE ( 20%)
Size(mm): 0.2-0.8 Morphology: ANHEDRAL
2VZ=45,SLIGHTLY ALTERED TO SMEC;
MAGNETITE ( 5%)
Size(mm): 0.05-0.2 Morphology: SUBHEDRAL,LATHS
SOME LATHS,MOSTLY IN INTERSTITIAL PATCHES;
CRYPTOCRYSTALLINE ( 10%)
MESOSTASIS,PARTLY REPLACED BY SMEC*
Alteration - ( >7%)
Location: INTERSTITIAL Replacing: OL
OL + SOME INTERSTITIAL MATERIAL REPLACED BY
GREENISH-BROWN SMEC*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 1350/1360 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 197.50 Rock Type: IGNEOUS
Core: 20 Sample Midpoint(m) : 201.86 Sect/Pc #: 3/PCE 12
ROCK = PLAG-AUGITE MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH;
Where sampled: OTHER
TOP OF COOLING UNIT XI*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 1-1.5 Morphology: EUHEDRAL-SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 3-5%)
Size(mm): 1-5 Morphology: SUBHEDRAL
SOME GLOMEROPHYRIC CLOTS WITH AUGITE;
AUGITE ( 1%)
Size(mm): 0.3-0.5 Morphology: ANHEDRAL
INTERGROWN WITH PLAG*
Groundmass - OLIVINE ( 3%)
Size(mm): 0.1-0.4 Morphology: EUHEDRAL-SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 10%)
Size(mm): 0.1-0.5 Morphology: EUHEDRAL-SKELETAL
FRESH;
AUGITE ( 10%)
Size(mm): 0.2-0.5 Morphology: EUHEDRAL
INTERGROWN WITH PLAG;
MAGNETITE ( 1-2%)
Morphology: GRANULES
MINUTE GRANULES,IN INTERSTITIAL PATCHES;
MICROCRYST GROUNDMASS ( 75%)
MESOSTASIS,POORLY CRYSTALLIZED CPX IN RADIATING
SHEAVES;
CLINOPYROXENE
Morphology: RADIATING SHEAVES
POORLY CRYSTALLIZED*
Alteration - SMECTITE
Location: MATRIX, Replacing: OL
Location: VESICLES
OL + VERY MINOR MATRIX MATERIAL REPLACED BY
YELLOWISH-BROWN SMEC;
CALCITE
Location: VESICLES
VESICLES FILLED WITH SMEC + MINOR CALCITE*
Vesicles -
Size(mm): 0.2-0.8
Percent: 1-2
Filling: SMEC,CALCITE
Shape: ROUND-
Shape: IRREGULAR
FILLED WITH SMEC + MINOR CALCITE*
Leg : 65 Top/Bottom Interval(mm): 620/ 640 Describer: Schmincke, H.
Hole: 482B Top of Core Depth(m) : 202.00 Rock Type: IGNEOUS
Core: 21 Sample Midpoint(m) : 202.63 Sect/Pc #: 1/PCE 8
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC,INTERSERTAL-OPHIMOTTLED,
QUENCH;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <2%)
Size(mm): 1-3 Morphology: SUBHEDRAL
PARTLY IN CLOTS,HIGHLY ZONED*
Groundmass - OLIVINE ( 2%)
Size(mm): 0.3-1 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 25%)
Size(mm): 0.5-2
CLINOPYROXENE ( 20%)
Size(mm): 0.2-1.5
COMBINATION ( 50%)
INCLUDES MAGN + ILMENITE + GLASS*
Alteration - CLAY MINERALS ( 10%)
Location: INTERSTITIAL Replacing: GLASS,OL
OL REPLACED BY SMEC*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 1130/1140 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 202.00 Rock Type: IGNEOUS
Core: 21 Sample Midpoint(m) : 204.64 Sect/Pc #: 2/PCE 7
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC,MEDIUM-GRAINED,
INTERGRANULAR-INTERSERTAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( TR%)
Size(mm): TO 2.5 Morphology: EUHEDRAL
REPLACED BY SMEC + CARB;
PLAGIOCLASE ( 1-2%)
Size(mm): 2-4 Morphology: SUBHEDRAL
ZONED,FRESH;
AUGITE ( <1%)
Size(mm): 1-1.5 Morphology: ANHEDRAL
FRESH,2VZ=45*
Groundmass - OLIVINE ( 1-2%)
Size(mm): 0.2-0.3 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 55%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL
FRESH;
AUGITE ( 35%)
Size(mm): 0.5-1 Morphology: ANHEDRAL
FRESH;
MAGNETITE ( 5%)
Size(mm): 0.1-0.4 Morphology: SUBHEDRAL-ANHEDRAL
CRYPTOCRYSTALLINE ( 5%)
MESOSTASIS*
Alteration - SMECTITE
Location: INTERSTITIAL Replacing: OL
OL REPLACED BY BROWN SMEC + CARB,INTERSTITIAL
MATERIAL MOSTLY FRESH BUT MINOR REPLACEMENT BY
SMEC;
CARBONATE
Replacing: OL
OL REPLACED BY BROWN SMEC + CARB*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 760/ 770 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 202.00 Rock Type: IGNEOUS
Core: 21 Sample Midpoint(m) : 205.76 Sect/Pc #: 3/PCE 8
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,MEDIUM-GRAINED,
INTERGRANULAR-INTERSERTAL;
Where sampled: OTHER
NEAR TOP OF PLAG-CPX PHYRIC COOLING UNIT XII*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 1-1.5 Morphology: SUBHEDRAL
REPLACED BY SMEC + CALCITE;
PLAGIOCLASE ( 5-8%)
Size(mm): 1-4 Morphology: SUBHEDRAL
OFTEN IN GLOMEROPHYRIC CLUSTERS,FRESH;
AUGITE ( <1%)
Size(mm): 1-2 Morphology: ANHEDRAL
OFTEN IN CLUSTERS,FRESH*
Groundmass - OLIVINE ( 3%)
Size(mm): 0.2-0.5 Morphology: EUHEDRAL-SUBHEDRAL
REPLACED BY SMEC + CARB;
PLAGIOCLASE ( 55%)
Size(mm): 0.1-1 Morphology: SUBHEDRAL
FRESH;
AUGITE ( 20%)
Size(mm): 0.2-0.5 Morphology: ANHEDRAL
FRESH,2VZ=45;
MAGNETITE ( 5%)
Size(mm): 0.05-0.1 Morphology: SUBHEDRAL
CRYPTOCRYSTALLINE ( 5%)
MESOSTASIS,SLIGHTLY ALTERED TO SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + MINOR INTERSTITIAL MATERIAL REPLACED BY BROWN
SMEC;
CARBONATE
Location: VESICLES
VESICLES FILLED WITH SMEC + MINOR CARB*
Vesicles -
Size(mm): 0.4-0.8
Percent: <1
Filling: SMEC,CARB
Shape: ROUND
FILLED WITH SMEC + MINOR CARB*
Leg : 65 Top/Bottom Interval(mm): 320/ 340 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 211.00 Rock Type: IGNEOUS
Core: 22 Sample Midpoint(m) : 212.83 Sect/Pc #: 2/PCE 4
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,FINE-GRAINED,
INTERGRANULAR-INTERSERTAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 5-8%)
Size(mm): 1-2 Morphology: SUBHEDRAL
SOME GLOMEROPHYRIC CLOTS TO 3 MM*
Groundmass - OLIVINE ( 3-5%)
Size(mm): 0.2-0.4 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 50%)
Size(mm): 0.2-1 Morphology: SUBHEDRAL
FRESH;
AUGITE ( 30%)
Size(mm): 0.2-0.4
FRESH,2VZ=45;
MAGNETITE ( 3-5%)
Size(mm): 0.05-0.2 Morphology: SUBHEDRAL
CRYPTOCRYSTALLINE ( 5%)
MESOSTASIS,PARTLY REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + SOME INTERSTITIAL MATERIAL REPLACED BY SMEC*
Vesicles -
Size(mm): TO 0.5
Percent: <1
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 340/ 360 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 211.00 Rock Type: IGNEOUS
Core: 22 Sample Midpoint(m) : 215.85 Sect/Pc #: 4/PCE 3
ROCK = PLAG-OL-AUGITE MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,FINE-GRAINED,
INTERGRANULAR-INTERSERTAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 1-2%)
Size(mm): 1-4.5 Morphology: EUHEDRAL
MOSTLY REPLACED BY SMEC;
PLAGIOCLASE ( 7%)
Size(mm): 1-4 Morphology: SUBHEDRAL
FRESH,OFTEN IN GLOMEROPHYRIC CLUSTERS;
AUGITE ( 1%)
Size(mm): 1-3 Morphology: SUBHEDRAL
FRESH,2VZ=45*
Groundmass - OLIVINE ( 3-5%)
Size(mm): 0.2-0.8 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 50%)
Size(mm): 0.2-1 Morphology: SUBHEDRAL
FRESH;
AUGITE ( 25%)
Size(mm): 0.2-0.6 Morphology: ANHEDRAL
FRESH,2VZ=45;
MAGNETITE ( 2-3%)
Size(mm): 0.05-0.1 Morphology: ANHEDRAL,LATHS
SOME LATHS;
CRYPTOCRYSTALLINE ( 5-8%)
MESOSTASIS,PARTLY ALTERED TO SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
MOST OL + MOST INTERSTITIAL MATERIAL ALTERED TO
BROWN SMEC*
Vesicles -
Size(mm): 0.2-0.4
Percent: 1
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 930/ 950 Describer: Robinson, P.
Hole: 482B Top of Core Depth(m) : 224.50 Rock Type: IGNEOUS
Core: 24 Sample Midpoint(m) : 225.44 Sect/Pc #: 1/PCE 5A
ROCK = APHYRIC BASALT;
Texture: APHYRIC,FINE-GRAINED,INTERGRANULAR-SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.3-0.9 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 50%)
Size(mm): 0.5-1.5 Morphology: SUBHEDRAL
FRESH;
AUGITE ( 35%)
Size(mm): 0.2-0.5 Morphology: ANHEDRAL
FRESH,2VZ=45;
MAGNETITE ( 2-3%)
Size(mm): 0.05-0.1 Morphology: SUBHEDRAL
CRYPTOCRYSTALLINE ( 5%)
MESOSTASIS,PARTLY REPLACED BY BROWN SMEC*
Alteration - SMECTITE
Location: VESICLES, Replacing: OL
Location: INTERSTITIAL
OL + SOME INTERSTITIAL MATERIAL REPLACED BY BROWN
SMEC*
Vesicles -
Size(mm): 1-1.5
Percent: 2
Filling: SMEC
Shape: ROUND
FILLED WITH BROWN SMEC*
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