Leg : 65 Top/Bottom Interval(mm): 300/ 310 Describer: Robinson, P.
Hole: 482D Top of Core Depth(m) : 138.00 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 138.31 Sect/Pc #: 1/PCE 4A
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC,FINE- TO MEDIUM-GRAINED,
INTERSERTAL-INTERGRANULAR,SUBVARIOLITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL,LATHS
FRESH*
Groundmass - OLIVINE ( 1%)
Size(mm): 0.1-0.3
IDENTITY QUESTIONABLE--POSSIBLE PSEUDOMORPHS OF
CARB AND PYRITE;
PLAGIOCLASE ( 55%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 30%)
Size(mm): 0.05-0.3 Morphology: ANHEDRAL-GRANULAR
OFTEN POORLY CRYSTALLIZED,FRESH,2VZ=30-35;
OPAQUE MINERALS ( 5%)
Size(mm): 0.05-0.2 Morphology: ANHEDRAL
MOSTLY PYRITE,OFTEN ASSOCIATED WITH CARB;
MICROCRYST GROUNDMASS ( 10%)
INTERSTITIAL MATERIAL,DEVITRIFIED GLASS AND POORLY
CRYSTALLIZED CPX,PARTLY REPLACED BY CARB AND
PYRITE;
GLASS
DEVITRIFIED,INTERSTITIAL*
Alteration - CARBONATE
Location: GROUNDMASS, Replacing: OL
Location: VESICLES
OL? + SOME GROUNDMASS MATERIAL REPLACED BY CARB +
PYRITE;
PYRITE
Location: GROUNDMASS, Replacing: OL
Location: VESICLES
OL? + SOME GROUNDMASS MATERIAL REPLACED BY CARB +
PYRITE*
Vesicles -
Size(mm): 0.2-0.5
Percent: <1
Filling: CARB,PYRITE
Shape: ROUND
SOME POORLY DEVELOPED SEGREGATION VESICLES*
Leg : 65 Top/Bottom Interval(mm): 1110/1130 Describer: Robinson, P.
Hole: 482D Top of Core Depth(m) : 138.00 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 139.12 Sect/Pc #: 1/PCE 12
ROCK = APHYRIC BASALT;
Texture: APHYRIC,FINE- TO MEDIUM-GRAINED,INTERSERTAL-
SUBOPHITIC,SLIGHTLY OPHIMOTTLED*
Groundmass - OLIVINE ( 3-4%)
Size(mm): 0.1-0.2 Morphology: SUBHEDRAL
COMPLETELY REPLACED BY SMEC AND MINOR CARB;
PLAGIOCLASE ( 50%)
Size(mm): 0.3-1 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 30%)
Size(mm): 0.1-0.3 Morphology: ANHEDRAL
FRESH,2VZ=40;
MAGNETITE ( 3%)
Size(mm): 0.01-0.08 Morphology: EUHEDRAL-SUBHEDRAL
MOSTLY IN INTERSTITIAL PATCHES;
CRYPTOCRYSTALLINE (10-15%)
INTERSTITIAL MATERIAL,PARTLY REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + SOME INTERSTITIAL MATERIAL ALTERED TO SMEC;
CARBONATE
Location: VESICLES
VESICLES FILLED WITH SMEC + CARB*
Vesicles -
Size(mm): 0.5
Percent: 2
Filling: SMEC,CARB
Shape: ROUND
MANY WITH SEGREGATION LENSES*
Leg : 65 Top/Bottom Interval(mm): 570/ 580 Describer: Robinson, P.
Hole: 482D Top of Core Depth(m) : 140.50 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 141.08 Sect/Pc #: 1/PCE 4
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC,MEDIUM-GRAINED,INTERSERTAL-
SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 1-1.5 Morphology: EUHEDRAL
FRESH*
Groundmass - OLIVINE ( 3%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL
COMPLETELY REPLACED BY SMEC;
PLAGIOCLASE ( 50%)
Size(mm): 0.2-0.7 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE (35-40%)
Size(mm): 0.1-0.3 Morphology: ANHEDRAL
FRESH,2VZ=40;
MAGNETITE ( 3%)
Size(mm): 0.05-0.1 Morphology: SUBHEDRAL
MICROCRYST GROUNDMASS ( 5-10%)
INTERSTITIAL MATERIAL,GLASSY,PARTLY REPLACED BY
SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + SOME INTERSTITIAL MATERIAL REPLACED BY SMEC*
Vesicles -
Size(mm): 0.2-1
Percent: 1
Filling: SMEC
Shape: ROUND
FILLED WITH OLIVE-GREEN SMEC*
Leg : 65 Top/Bottom Interval(mm): 490/ 500 Describer: Robinson, P.
Hole: 482D Top of Core Depth(m) : 140.50 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 144.00 Sect/Pc #: 3/PCE 8
ROCK = APHYRIC BASALT;
Texture: APHYRIC,FINE-GRAINED,INTERSERTAL-INTERGRANULAR*
Groundmass - OLIVINE ( 2-3%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 45%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 35%)
Size(mm): 0.1-0.3 Morphology: ANHEDRAL
FRESH,2VZ=40;
MAGNETITE ( 3%)
Size(mm): 0.02-0.1 Morphology: SUBHEDRAL
MOSTLY IN INTERSTITIAL PATCHES;
CRYPTOCRYSTALLINE ( 15%)
INTERSTITIAL MATERIAL,GLASSY-CRYPTXLN,MOSTLY
REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + MOST INTERSTITIAL MATERIAL REPLACED BY SMEC*
Vesicles -
Size(mm): TO 0.5
Percent: <1
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 700/ 720 Describer: Robinson, P.
Hole: 482D Top of Core Depth(m) : 150.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 152.71 Sect/Pc #: 2/PCE 5D
ROCK = APHYRIC BASALT;
Texture: APHYRIC,MEDIUM-GRAINED,INTERSERTAL-
INTERGRANULAR*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 2-4 Morphology: SUBHEDRAL
PARTLY REPLACED BY SMEC;
PLAGIOCLASE ( <1%)
Size(mm): 1 Morphology: SUBHEDRAL
FRESH,IN SMALL CLOTS WITH OL*
Groundmass - OLIVINE ( 2-3%)
Size(mm): 0.1-0.5 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 50%)
Size(mm): 0.2-1 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 35%)
Size(mm): 0.1-0.3 Morphology: ANHEDRAL
FRESH,2VZ=35-40;
MAGNETITE ( 3%)
Size(mm): 0.03-0.1 Morphology: SUBHEDRAL
MOSTLY IN INTERSTITIAL PATCHES;
MICROCRYST GROUNDMASS ( 10%)
INTERSTITIAL MATERIAL,MICROXLN FEL + CPX + SILICA
+ APATITE,PARTLY REPLACED BY SMEC;
FELDSPAR
MICROXLN,INTERSTITIAL;
SILICA
MICROXLN,INTERSTITIAL;
APATITE
MICROXLN,INTERSTITIAL*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + INTERSTITIAL MATERIAL PARTLY REPLACED BY
SMEC*
Vesicles -
Size(mm): 0.2-0.5
Percent: <1
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 170/ 190 Describer: Robinson, P.
Hole: 482D Top of Core Depth(m) : 150.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 153.68 Sect/Pc #: 3/PCE 2C
ROCK = APHYRIC BASALT;
Texture: APHYRIC,FINE-GRAINED,INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( TR%)
Size(mm): TO 1 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( TR%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL
FRESH*
Groundmass - OLIVINE ( 1%)
Size(mm): 0.1-0.2 Morphology: SUBHEDRAL
IDENTITY QUESTIONABLE--SUBHEDRAL PSEUDOMORPHS
OF SMEC;
PLAGIOCLASE ( 50%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 40%)
Size(mm): 0.1-0.2 Morphology: ANHEDRAL
FRESH,2VZ=40;
MAGNETITE ( 2-3%)
Size(mm): 0.05-0.1 Morphology: SUBHEDRAL-ANHEDRAL
CRYPTOCRYSTALLINE ( 5%)
INTERSTITIAL MATERIAL,CRYPTXLN MATERIAL WITH SOME
APATITE,REPLACED BY SMEC;
APATITE
CRYPTXLN MATERIAL HAS SOME APATITE,INTERSTITIAL*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + INTERSTITIAL MATERIAL REPLACED BY SMEC;
OPAL
Location: GROUNDMASS
MINOR OPAL? IN GROUNDMASS*
Vesicles -
Size(mm): 0.3
Percent: 1
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 1010/1030 Describer: Robinson, P.
Hole: 482D Top of Core Depth(m) : 150.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 154.52 Sect/Pc #: 3/PCE 13
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 0.3-0.5 Morphology: SUBHEDRAL-EUHEDRAL
COMPLETELY REPLACED BY SMEC;
PLAGIOCLASE ( 15%)
Size(mm): 0.5-1.5 Morphology: SUBHEDRAL,LATHS,ACICULAR
SERIATE,SUBHEDRAL LATHS AND ACICULAR XTLS,FRESH*
Groundmass - OLIVINE ( 1%)
Size(mm): 0.05-0.1 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 5-10%)
Size(mm): 0.2-0.5 Morphology: ACICULAR
FRESH;
MAGNETITE ( 2-3%)
Morphology: GRANULES
MINUTE GRANULES IN GROUNDMASS;
MICROCRYST GROUNDMASS (70-75%)
INTERSTITIAL MATERIAL,QUENCH MIXTURE OF CPX + MAGN
+ PLAG,MOSTLY FRESH*
Alteration - SMECTITE
Location: VESICLES,
Location: GROUNDMASS
OL + SOME GROUNDMASS MATERIAL REPLACED BY SMEC,
VESICLES ARE OPEN OR FILLED WITH SMEC*
Vesicles -
Size(mm): 0.5-1
Percent: 1-2
Filling: EMPTY,SMEC
Shape: ROUND-
Shape: IRREGULAR
OPEN OR FILLED WITH SMEC*
Leg : 65 Top/Bottom Interval(mm): 1330/1350 Describer: Robinson, P.
Hole: 482D Top of Core Depth(m) : 159.50 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 160.84 Sect/Pc #: 1/PCE 13B
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH-INTERSERTAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.5 Morphology: SUBHEDRAL
PARTLY REPLACED BY SMEC,2VX=88;
PLAGIOCLASE ( 10%)
Size(mm): 0.5-2 Morphology: SUBHEDRAL,LATHS
SERIATE,SUBHEDRAL LATHS,FRESH*
Groundmass - OLIVINE ( 2%)
Size(mm): 0.2-0.4 Morphology: SUBHEDRAL
PARTLY REPLACED BY SMEC;
PLAGIOCLASE ( 45%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE ( 30%)
Size(mm): 0.05-0.2 Morphology: SHEAVES,GRANULES
POORLY CRYSTALLIZED SHEAVES AND GRANULES,FRESH;
MAGNETITE ( 2%)
Morphology: GRANULES
MINUTE GRANULES IN INTERSTITIAL PATCHES;
CRYPTOCRYSTALLINE ( 10%)
INTERSTITIAL MATERIAL,GLASSY TO CRYPTXLN,PARTLY
REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
SOME OL + INTERSTITIAL MATERIAL REPLACED BY SMEC*
Vesicles -
Size(mm): 0.2-0.3
Percent: <1
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 1070/1090 Describer: Robinson, P.
Hole: 482D Top of Core Depth(m) : 168.50 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 169.58 Sect/Pc #: 1/PCE 11
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,MEDIUM-GRAINED,
INTERSERTAL-SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 5%)
Size(mm): 0.5-3 Morphology: SUBHEDRAL
FRESH*
Groundmass - OLIVINE ( 5-7%)
Size(mm): 0.1-0.5 Morphology: SUBHEDRAL
PARTLY REPLACED BY SMEC,2VX=88;
PLAGIOCLASE ( 45%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE ( 35%)
Size(mm): 0.2-0.3 Morphology: ANHEDRAL
FRESH,2VZ=40;
MAGNETITE ( 3%)
Morphology: GRANULES
MINUTE GRANULES,MOSTLY IN INTERSTITIAL PATCHES;
CRYPTOCRYSTALLINE ( 5%)
INTERSTITIAL MATERIAL,PARTLY REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
SOME OL + INTERSTITIAL MATERIAL REPLACED BY SMEC,
VESICLES RIMMED WITH SMEC AND FILLED WITH CARB;
CARBONATE
Location: VESICLES
VESICLES RIMMED WITH SMEC AND FILLED WITH CARB*
Vesicles -
Size(mm): 0.2-0.3
Percent: 1
Filling: SMEC,CARB
Shape: ROUND
RIMMED WITH SMEC AND FILLED WITH CARB*
Leg : 65 Top/Bottom Interval(mm): 490/ 500 Describer: Robinson, P.
Hole: 482D Top of Core Depth(m) : 168.50 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 170.50 Sect/Pc #: 2/PCE 6
ROCK = PLAG-OL-CPX MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): TO 0.5 Morphology: EUHEDRAL-SUBHEDRAL
ALTERED TO SMEC;
PLAGIOCLASE ( 5%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL,LATHS
FRESH
CLINOPYROXENE ( 2-3%)
Size(mm): 0.3-0.6 Morphology: ANHEDRAL
FRESH,EITHER AS SINGLE XTLS OR IN CLOTS INTERGROWN
WITH PLAG,2VZ=35;
Groundmass - MICROCRYST GROUNDMASS ( 90%)
QUENCHED GROUNDMASS,CONSISTS OF FINE MAGN GRAINS
IN POORLY CRYSTALLIZED MIXTURE OF CPX AND PLAG IN
RADIATING SHEAVES,SOME SMALL GLASSY PATCHES PARTLY
REPLACED BY SMEC;
MAGNETITE
FINE GRAINS;
CLINOPYROXENE
POORLY CRYSTALLIZED;
PLAGIOCLASE
Morphology: RADIATING SHEAVES
POORLY CRYSTALLIZED*
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-
Shape: IRREGULAR
Leg : 65 Top/Bottom Interval(mm): 800/ 840 Describer: Robinson, P.
Hole: 482D Top of Core Depth(m) : 168.50 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 170.82 Sect/Pc #: 2/PCE 10
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,FINE-GRAINED,INTERSERTAL-
QUENCH*
Phenocrysts- PLAGIOCLASE ( 3%)
Size(mm): 0.5-1.5 Morphology: SUBHEDRAL-EUHEDRAL
ZONED,FRESH*
Groundmass - OLIVINE ( 2%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 45%)
Size(mm): 0.1-0.5 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE (30-35%)
Size(mm): 0.05-0.2 Morphology: ANHEDRAL,SHEAVES
OFTEN IN POORLY CRYSTALLIZED SHEAVES,FRESH,2VZ=40;
MAGNETITE ( 2%)
MINUTE CRYSTALS IN INTERSTITIAL PATCHES;
MICROCRYST GROUNDMASS (10-15%)
INTERSTITIAL MATERIAL,GLASSY,PARTLY REPLACED BY
SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + SOME INTERSTITIAL MATERIAL REPLACED BY SMEC*
Vesicles -
Size(mm): 0.1-0.3
Percent: 1
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 1160/1170 Describer: Robinson, P.
Hole: 482D Top of Core Depth(m) : 168.50 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 172.67 Sect/Pc #: 3/PCE 11
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC,MEDIUM-GRAINED,INTERSERTAL-
SUBOPHITIC*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 1-1.5 Morphology: SUBHEDRAL
FRESH*
Groundmass - OLIVINE ( 3%)
Size(mm): 0.1-0.6 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 50%)
Size(mm): 0.2-0.6 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 40%)
Size(mm): 0.1-0.4 Morphology: ANHEDRAL
FRESH,2VZ=40;
MAGNETITE ( 1-2%)
Size(mm): 0.02-0.1 Morphology: EUHEDRAL-SUBHEDRAL
IN INTERSTITIAL PATCHES;
CRYPTOCRYSTALLINE ( 5-8%)
INTERSTITIAL MATERIAL,CRYPTXLN WITH MINOR APATITE,
PARTLY REPLACED BY SMEC;
APATITE
MINOR*
Alteration - SMECTITE
Location: INTERSTITIAL,
Location: VESICLES
OL + SOME INTERSTITIAL MATERIAL REPLACED BY SMEC*
Vesicles -
Size(mm): TO 0.3
Percent: 1
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 1230/1250 Describer: Robinson, P.
Hole: 482D Top of Core Depth(m) : 177.50 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 178.74 Sect/Pc #: 1/PCE 15
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,FINE-GRAINED,INTERSERTAL-
SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 2-4%)
Size(mm): 0.5-3 Morphology: SUBHEDRAL-EUHEDRAL
OFTEN IN CLUSTERS,SOME ZONED,FRESH*
Groundmass - OLIVINE ( 3-5%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL
REPLACED BY SMEC + CARB;
PLAGIOCLASE ( 45%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 40%)
Size(mm): 0.1-0.4 Morphology: ANHEDRAL
FRESH,2VZ=40;
MAGNETITE ( 2%)
Morphology: GRANULES
MINUTE GRANULES IN INTERSTITIAL PATCHES;
CRYPTOCRYSTALLINE ( 5%)
INTERSTITIAL MATERIAL,PARTLY REPLACED BY SMEC AND
CARB*
Alteration - SMECTITE
Location: INTERSTITIAL Replacing: OL
OL + SOME INTERSTITIAL MATERIAL REPLACED BY SMEC +
CARB;
CARBONATE
Location: INTERSTITIAL Replacing: OL
OL + SOME INTERSTITIAL MATERIAL REPLACED BY SMEC +
CARB*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 80/ 90 Describer: Robinson, P.
Hole: 482D Top of Core Depth(m) : 177.50 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 180.59 Sect/Pc #: 3/PCE 1
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC,FINE-GRAINED,INTERSERTAL-
INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL
FRESH,USUALLY IN CLUSTERS*
Groundmass - OLIVINE ( 2-3%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 50%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 40%)
Size(mm): 0.1-0.3 Morphology: ANHEDRAL
FRESH,2VZ=40;
MAGNETITE ( 2%)
Size(mm): TO 0.05 Morphology: EUHEDRAL-SUBHEDRAL
USUALLY IN INTERSTITIAL PATCHES;
CRYPTOCRYSTALLINE ( 5%)
INTERSTITIAL MATERIAL,PARTLY REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + SOME INTERSTITIAL MATERIAL REPLACED BY SMEC*
Vesicles -
Size(mm): 0.1
Percent: TR
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 00/ 10 Describer: Robinson, P.
Hole: 482D Top of Core Depth(m) : 177.50 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 180.81 Sect/Pc #: CC/
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 0.4-0.7 Morphology: EUHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 3-4%)
Size(mm): 0.5-1.5 Morphology: SUBHEDRAL,LATHS
FRESH*
Groundmass - OLIVINE ( 2%)
Size(mm): 0.05-0.1 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 5-10%)
Size(mm): TO 0.4 Morphology: ACICULAR
FRESH;
GLASS (80-85%)
BROWN,INCIPIENTLY CRYSTALLIZED WITH SHEAF
STRUCTURE,FRESH*
Alteration - SMECTITE
Location: VEINS, Replacing: OL,GLASS
Location: VESICLES
OL + MINOR GLASS ALTERED TO SMEC,RARE VEINS AND
FRACTURES (0.2 MM WIDE) FILLED WITH SMEC*
Vesicles -
Size(mm): 0.2-0.3
Percent: 1
Filling: SMEC
Shape: ROUND
|
