Leg : 65 Top/Bottom Interval(mm): 490/ 500 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 110.50 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 111.00 Sect/Pc #: 1/PCE 6
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,MEDIUM-GRAINED,INTERGRANULAR-
INTERSERTAL*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.3-0.8 Morphology: EUHEDRAL
PARTLY ALTERED TO SMEC;
PLAGIOCLASE ( 10%)
Size(mm): 0.2-2.5 Morphology: SUBHEDRAL
FRESH,MOSTLY IN GLOMEROPHYRIC CLOTS*
Groundmass - OLIVINE ( 1-2%)
Size(mm): 0.05-0.2 Morphology: SUBHEDRAL
PARTLY ALTERED TO SMEC,2V=90;
PLAGIOCLASE ( 45%)
Size(mm): 0.1-0.5 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE ( 35%)
Size(mm): 0.1-0.2 Morphology: GRANULAR
FRESH,2VZ=40;
OPAQUE MINERALS ( 3%)
Size(mm): 0.05-0.1 Morphology: SUBHEDRAL
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 10%)
INTERSTITIAL MATERIAL,GLASSY,MOSTLY ALTERED TO
SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + INTERSTITIAL MATERIAL PARTLY REPLACED BY SMEC
+ TRACES OF CARB;
CARBONATE ( TR%)
Location: INTERSTITIAL Replacing: OL
OL + INTERSTITIAL MATERIAL PARTLY REPLACED BY SMEC
+ TRACES OF CARB*
Vesicles -
Size(mm): 0.3
Percent: <1
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 1250/1260 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 110.50 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 111.76 Sect/Pc #: 1/PCE 13
ROCK = APHYRIC BASALT;
Texture: APHYRIC,MEDIUM- TO COARSE-GRAINED,SUBOPHITIC*
Groundmass - OLIVINE ( 2%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 45%)
Size(mm): 0.1-1 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE ( 45%)
Size(mm): 0.1-0.5 Morphology: ANHEDRAL
FRESH,2VZ=40;
OPAQUE MINERALS ( 2%)
Size(mm): 0.05-0.2
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 7%)
INTERSTITIAL MATERIAL,GLASSY,ALTERED TO SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + INTERSTITIAL MATERIAL REPLACED BY SMEC +
MINOR CARB;
CARBONATE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + INTERSTITIAL MATERIAL REPLACED BY SMEC +
MINOR CARB*
Vesicles -
Size(mm): 0.5-0.8
Percent: 1-2
Filling: SMEC,CARB
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 500/ 530 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 119.50 Rock Type: IGNEOUS
Core: 4 Sample Midpoint(m) : 124.51 Sect/Pc #: 4/PCE 5
ROCK = APHYRIC BASALT;
Texture: APHYRIC,COARSE-GRAINED,SUBOPHITIC-INTERSERTAL*
Groundmass - OLIVINE ( 2-3%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 45%)
Size(mm): 0.3-1.3 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE ( 45%)
Size(mm): 0.3-0.7 Morphology: SUBHEDRAL-ANHEDRAL,PLATES
FRESH,USUALLY IN SUBOPHITIC PLATES,OFTEN ZONED,
2VZ=40;
OPAQUE MINERALS ( 3%)
Size(mm): 0.05-0.1 Morphology: SUBHEDRAL
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 2-3%)
INTERSTITIAL MATERIAL,GLASSY,REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL Replacing: OL
OL + INTERSTITIAL MATERIAL REPLACED BY SMEC*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 480/ 500 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 133.00 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 134.99 Sect/Pc #: 2/PCE 2C
ROCK = APHYRIC BASALT;
Texture: APHYRIC,COARSE-GRAINED,INTERGRANULAR-SUBOPHITIC*
Groundmass - OLIVINE ( 3-5%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE (45-50%)
Size(mm): 0.1-0.6 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE (40-45%)
Size(mm): 0.02-0.04 Morphology: ANHEDRAL
FRESH,2VZ=40;
OPAQUE MINERALS ( 5%)
Size(mm): 0.05-0.15 Morphology: SUBHEDRAL,SKELETAL
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 2-3%)
INTERSTITIAL MATERIAL,REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VEINLET
OL + MINOR INTERSTITIAL MATERIAL REPLACED BY
GREENISH-BROWN SMEC,ONE VEINLET (0.3 MM WIDE)
LINED WITH BROWN SMEC AND FILLED WITH CARB;
CARBONATE
Location: VEINLET
ONE VEINLET (0.3 MM WIDE) LINED WITH BROWN SMEC
AND FILLED WITH CARB*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 80/ 90 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 137.50 Rock Type: TUFF
Core: 8 Sample Midpoint(m) : 137.59 Sect/Pc #: 1/PCE 5A
ROCK = PALAGONITE TUFF
INCLUDES FORAMS + SPONGE SPICULES (1-2%) AND
LITHIC FRAGMENTS (1%--MOSTLY MICROXLN BASALT) IN
ADDITION TO WHAT IS LISTED BELOW;
Texture: VITROCLASTIC,FINE- TO MEDIUM-GRAINED;
Where sampled: OTHER
HYALOCLASTITE OVERLYING MASSIVE COOLING UNIT*
Phenocrysts- PLAGIOCLASE ( 2-3%)
Size(mm): 0.3-0.8 Morphology: SUBHEDRAL-ANHEDRAL,SLIVERS
SOME XTL SLIVERS,FRESH;
CLINOPYROXENE ( TR%)
Morphology: GRANULES
IDENTITY QUESTIONABLE;
COMBINATION ( 1-2%)
Morphology: ANGULAR
QUARTZ + HEAVY MINERAL GRAINS,SAND-SIZE*
Groundmass - GLASS (50-75%)
Size(mm): 0.2-0.6 Morphology: SHARDS,ANGULAR
MOSTLY REPLACED BY BROWN AND GREEN SMEC OR
ZEOLITE;
OTHER ( 45%)
CEMENT IS BROWN FIBROUS ZEOLITE (PHILLIPSITE?)
WITH MINOR CALCITE*
Alteration - SMECTITE
Replacing: GLASS
GLASS TO SMEC + ZEOLITE;
ZEOLITE
Replacing: GLASS
GLASS TO SMEC + ZEOLITE,BROWN FIBROUS ZEOLITE
(PHILLIPSITE?)*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 450/ 460 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 137.50 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 137.96 Sect/Pc #: 1/PCE 6C
ROCK = APHYRIC BASALT;
Texture: APHYRIC,FINE- TO MEDIUM-GRAINED,SUBOPHITIC-
INTERSERTAL*
Groundmass - OLIVINE ( 5-8%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL
PARTLY REPLACED BY SMEC;
PLAGIOCLASE (45-50%)
Size(mm): 0.2-0.8 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE (40-45%)
Size(mm): 0.3-0.5 Morphology: ANHEDRAL
FRESH,2VZ=40;
OPAQUE MINERALS ( 3%)
Size(mm): 0.05-0.1 Morphology: SUBHEDRAL
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 2-3%)
INTERSTITIAL MATERIAL,REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES,
Location: VEINLET
INTERSTITIAL MATERIAL + SOME OL REPLACED BY SMEC,
ONE HAIRLINE VEINLET FILLED WITH BROWNISH-GREEN
SMEC;
CARBONATE
Location: VESICLES
Vesicles -
Size(mm): 0.5
Percent: <1
Filling: SMEC,CARB
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 1330/1370 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 137.50 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 140.35 Sect/Pc #: 2/PCE 9
ROCK = APHYRIC BASALT;
Texture: APHYRIC,FINE- TO COARSE-GRAINED,OPHIMOTTLED-
INTERSERTAL*
Groundmass - OLIVINE (10-12%)
Size(mm): 0.2-0.8 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE (40-45%)
Size(mm): 0.3-1 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE (30-45%)
Size(mm): 0.2-3 Morphology: GRANULAR-LARGE,IRREGULAR
Morphology: PLATES
IRREGULAR OPHITIC PLATES,FRESH,2VZ=45;
OPAQUE MINERALS ( 2%)
Size(mm): 0.05-0.1 Morphology: SUBHEDRAL
PROBABLY MAGN*
Alteration - SMECTITE
Location: VESICLES Replacing: OL,PLAG,PYX
OL ALTERED TO SMEC,SOME PATCHES SHOW REPLACEMENT
OF PLAG + PYX BY SMEC + CHLORITE + CARB;
CHLORITE
Replacing: PLAG,PYX
SOME PATCHES SHOW REPLACEMENT OF PLAG + PYX BY
SMEC + CHLORITE + CARB;
CARBONATE
Replacing: PLAG,PYX
SOME PATCHES SHOW REPLACEMENT OF PLAG + PYX BY
SMEC + CHLORITE + CARB*
Vesicles -
Size(mm): 0.5
Percent: TR
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 330/ 350 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 146.50 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 146.84 Sect/Pc #: 1/PCE 4
ROCK = PLAG-OL-CPX MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): 0.2-0.4 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 3-5%)
Size(mm): 0.5 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 1%)
Size(mm): 0.2-0.4 Morphology: ANHEDRAL
OFTEN IN SMALL CLOTS WITH PLAG,FRESH,2VZ=45*
Groundmass - MESOSTASIS ( 90%)
QUENCH MIXTURE OF PLAG NEEDLES + POORLY
CRYSTALLIZED CPX WITH SHEAF-LIKE TEXTURE +
GRANULAR OP.MINS;
PLAGIOCLASE
Morphology: NEEDLES
QUENCH;
CLINOPYROXENE
Morphology: SHEAF-LIKE
POORLY CRYSTALLIZED WITH SHEAF-LIKE TEXTURE;
OPAQUE MINERALS
Morphology: GRANULAR
QUENCH*
Alteration - SMECTITE
Replacing: OL
OL REPLACED BY SMEC + SOME CARB;
CARBONATE
Replacing: OL
OL REPLACED BY SMEC + SOME CARB*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 400/ 420 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 146.50 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 146.91 Sect/Pc #: 1/PCE 5
ROCK = APHYRIC BASALT;
Texture: APHYRIC,MEDIUM-GRAINED,SUBOPHITIC-INTERGRANULAR*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL-ANHEDRAL
MOSTLY FRESH,SOME GRAINS RIMMED WITH SMEC,2V=90;
PLAGIOCLASE (40-45%)
Size(mm): 0.1-1 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE ( 45%)
Size(mm): 0.1-1 Morphology: ANHEDRAL
USUALLY SUBOPHITIC,FRESH,2VZ=45;
OPAQUE MINERALS ( 2-3%)
Morphology: GRAINS
MINUTE GRAINS,PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 2-3%)
INTERSTITIAL MATERIAL,GLASSY,PARTLY REPLACED BY
SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL Replacing: OL
SOME OL + INTERSTITIAL MATERIAL ALTERED TO SMEC*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 150/ 170 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 169.00 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 169.16 Sect/Pc #: 1/PCE 2
ROCK = PLAG-OL-CPX PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH*
Phenocrysts- OLIVINE ( 2-5%)
Size(mm): 1-2 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE (10-12%)
Size(mm): 1-3 Morphology: SUBHEDRAL,LATHS
OFTEN IN CLUSTERS WITH CPX,FRESH;
CLINOPYROXENE ( 3%)
Size(mm): 0.2-0.6 Morphology: ANHEDRAL
IN SUBOPHITIC CLOTS WITH PLAG,FRESH,2VZ=40*
Groundmass - MESOSTASIS (80-85%)
QUENCH MIXTURE OF SMALL PLAG LATHS + POORLY
CRYSTALLIZED CPX + GRANULAR MAGN,MOSTLY FRESH;
PLAGIOCLASE
Morphology: LATHS
SMALL,QUENCH;
CLINOPYROXENE
POORLY CRYSTALLIZED;
MAGNETITE
Morphology: GRANULAR
QUENCH*
Alteration - SMECTITE
Location: GROUNDMASS, Replacing: OL
Location: VESICLES
OL + SOME GROUNDMASS MATERIAL REPLACED BY SMEC;
CARBONATE
Location: VESICLES
Vesicles -
Size(mm): 0.5-1
Percent: 1-2
Filling: SMEC,CARB
Shape: ROUND
SOME WITH SEGREGATION PATCHES,MOSTLY FILLED WITH
SMEC + CARB*
Leg : 65 Top/Bottom Interval(mm): 940/ 960 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 169.00 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 171.45 Sect/Pc #: 2/PCE 9
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,FINE-GRAINED,
INTERGRANULAR-INTERSERTAL*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.6 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 2%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL
FRESH*
Groundmass - OLIVINE ( 1-2%)
Size(mm): 0.1-0.2 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 50%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 40%)
Size(mm): 0.05-0.3 Morphology: GRANULAR
USUALLY GRANULAR,FRESH,2VZ=40;
OPAQUE MINERALS ( 1-2%)
MINUTE XTLS OF MAGN;
MICROCRYST GROUNDMASS ( 2-3%)
INTERSTITIAL MATERIAL,REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + INTERSTITIAL MATERIAL REPLACED BY SMEC;
CARBONATE
Location: VESICLES
Vesicles -
Size(mm): 1-2
Percent: 2-3
Filling: SMEC,CARB
Shape: ROUND-
Shape: IRREGULAR
Leg : 65 Top/Bottom Interval(mm): 30/ 50 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 174.50 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 174.54 Sect/Pc #: 1/PCE 1
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH*
Phenocrysts- OLIVINE ( 1-2%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL
REPLACED BY SMEC + MINOR CARB;
PLAGIOCLASE ( 5-7%)
Size(mm): 1-4 Morphology: SUBHEDRAL
FRESH,ZONED,SOME IN GLOMEROPHYRIC CLUSTERS;
CLINOPYROXENE ( <1%)
Size(mm): 0.2-0.4 Morphology: ANHEDRAL
IN GLOMEROPHYRIC CLUSTERS WITH PLAG,FRESH,2VZ=40*
Groundmass - COMBINATION ( 90%)
QUENCH MIXTURE OF SMALL XTLS OF OL + PLAG + MAGN
IN A MATRIX OF POORLY CRYSTALLIZED CPX WITH
RADIATING SHEAVES,MINOR GLASS ALSO PRESENT,FRESH;
OLIVINE
QUENCH;
PLAGIOCLASE
QUENCH;
MAGNETITE
QUENCH;
CLINOPYROXENE
Morphology: RADIATING SHEAVES
FORMS MATRIX;
GLASS
MINOR GLASS PRESENT*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL REPLACED BY SMEC + MINOR CARB;
CARBONATE
Replacing: OL
OL REPLACED BY SMEC + MINOR CARB*
Vesicles -
Size(mm): 0.2-0.6
Percent: 1
Filling: SMEC
Shape: ROUND
SOME WITH SEGREGATION PATCHES*
Leg : 65 Top/Bottom Interval(mm): 1450/1470 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 174.50 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 175.96 Sect/Pc #: 1/PCE 4B
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 1-2%)
Size(mm): 1-4 Morphology: SUBHEDRAL
PARTLY REPLACED BY SMEC,SOME FRESH;
PLAGIOCLASE ( 3-5%)
Size(mm): 1-3 Morphology: SUBHEDRAL
FRESH,MOSTLY IN GLOMEROPHYRIC CLUSTERS;
CLINOPYROXENE ( <1%)
Size(mm): 1-4 Morphology: ANHEDRAL
INTERGROWN WITH PLAG + OL,FRESH*
Groundmass - OLIVINE ( 2%)
Size(mm): 0.1-0.4 Morphology: SUBHEDRAL
MOSTLY REPLACED BY SMEC;
PLAGIOCLASE (15-20%)
Size(mm): 0.3-1 Morphology: SKELETAL
FRESH;
CLINOPYROXENE (20-25%)
Morphology: GRANULAR-RADIADING SHEAVES
OPAQUE MINERALS ( 2-3%)
Morphology: GRANULES
MINUTE GRANULES,PROBABLY MAGN;
GLASS (30-50%)
INTERSTITIAL,FRESH*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL REPLACED BY SMEC*
Vesicles -
Size(mm): 0.05-0.3
Percent: <1
Filling: SMEC
Shape: ROUND-
Shape: IRREGULAR
Leg : 65 Top/Bottom Interval(mm): 1460/1480 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 174.50 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 177.47 Sect/Pc #: 2/PCE 14
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 8-10%)
Size(mm): 0.5-3 Morphology: SUBHEDRAL,LATHS
FRESH,STRONGLY ZONED;
CLINOPYROXENE ( <1%)
Size(mm): 0.3 Morphology: ANHEDRAL
INTERGROWN WITH PLAG IN GLOMEROPHYRIC CLOTS,FRESH,
2VZ=45*
Groundmass - MESOSTASIS ( 90%)
QUENCH MIXTURE COMPOSED MOSTLY OF POORLY
CRYSTALLIZED CPX + ACICULAR PLAG NEEDLES + SMALL
OL XTLS REPLACED BY SMEC + MINUTE OPAQUE GRANULES;
CLINOPYROXENE
POORLY CRYSTALLIZED;
PLAGIOCLASE
Morphology: ACICULAR
OLIVINE
SMALL XTLS REPLACED BY SMEC;
OPAQUE MINERALS
Morphology: GRANULES
MINUTE GRANULES*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL REPLACED BY SMEC*
Vesicles -
Size(mm): 1-2
Percent: 1
Filling: SMEC
Shape: ROUND
FILLED WITH BROWN SMEC*
Leg : 65 Top/Bottom Interval(mm): 1350/1370 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 174.50 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 178.86 Sect/Pc #: 3/PCE 12
ROCK = PLAG-OL-CPX MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,MEDIUM-GRAINED,
INTERGRANULAR-INTERSERTAL*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.5 Morphology: SUBHEDRAL
SERIATE TO GROUNDMASS GRAINS,MOSTLY REPLACED BY
SMEC,SOME FRESH;
PLAGIOCLASE ( 5%)
Size(mm): 1-2 Morphology: SUBHEDRAL
FRESH,ZONED;
CLINOPYROXENE ( 1%)
Size(mm): 0.5 Morphology: ANHEDRAL
SERIATE TO GROUNDMASS GRAINS,INTERGROWN WITH PLAG,
FRESH,2VZ=45*
Groundmass - OLIVINE ( 3-4%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL
MOSTLY REPLACED BY SMEC;
PLAGIOCLASE (40-45%)
Size(mm): 0.2-0.8 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE ( 35%)
Size(mm): 0.1-0.3 Morphology: ANHEDRAL
FRESH,2VZ=45;
OPAQUE MINERALS ( 2-3%)
Morphology: GRANULES,LATHS
MINUTE GRANULES AND LATHS,IN INTERSTITIAL AREAS;
MICROCRYST GROUNDMASS ( 10%)
INTERSTITIAL MATERIAL,MOSTLY GLASSY,FRESH*
Alteration - SMECTITE
Replacing: OL
OL PARTLY REPLACED BY SMEC;
CARBONATE
Location: VEINLET
ONE HAIRLINE VEINLET FILLED WITH CARB*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 460/ 480 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 180.00 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 181.97 Sect/Pc #: 2/PCE 3C
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 0.2-0.3 Morphology: SUBHEDRAL
REPLACED BY SMEC + MINOR CARB;
PLAGIOCLASE ( 3%)
Size(mm): 0.2-3 Morphology: SUBHEDRAL,LATHS
LARGEST GRAINS CORRODED,FRESH*
Groundmass - PLAGIOCLASE ( 10%)
Morphology: ACICULAR,LATHS
QUENCH;
OPAQUE MINERALS ( 1-2%)
Morphology: GRANULAR
QUENCH;
MESOSTASIS ( 85%)
Morphology: SHEAF-LIKE
VERY POORLY CRYSTALLIZED MATRIX WITH SHEAF-LIKE
TEXTURE*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL REPLACED BY SMEC;
CARBONATE
Location: VESICLES
Vesicles -
Size(mm): 0.2-0.3
Filling: SMEC,CARB
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 850/ 870 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 194.00 Rock Type: IGNEOUS
Core: 17 Sample Midpoint(m) : 194.86 Sect/Pc #: 1/PCE 10A
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.2-1 Morphology: SUBHEDRAL
MOSTLY REPLACED BY SMEC;
PLAGIOCLASE ( 4-5%)
Size(mm): 0.5-1.5 Morphology: SKELETAL,LATHS
STRONGLY ZONED,FRESH*
Groundmass - PLAGIOCLASE (35-40%)
Size(mm): 0.05-0.5 Morphology: ACICULAR,SKELETAL
OFTEN SKELETAL,SOME SLIGHT REPLACEMENT BY SMEC;
CLINOPYROXENE (45-50%)
Size(mm): 0.05-0.2 Morphology: GRANULAR-SHEAF-LIKE
POORLY CRYSTALLIZED,FRESH;
OPAQUE MINERALS ( 5%)
Size(mm): 0.005-0.05 Morphology: SQUARE-IRREGULAR GRANULES
PROBABLY MAGN*
Alteration - SMECTITE
Location: GROUNDMASS, Replacing: OL
Location: VESICLES
OL + GROUNDMASS MATERIAL PARTLY REPLACED BY SMEC;
CARBONATE
Location: VESICLES
Vesicles -
Size(mm): 0.5
Percent: TR
Filling: SMEC,CARB
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 70/ 90 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 194.00 Rock Type: IGNEOUS
Core: 17 Sample Midpoint(m) : 197.08 Sect/Pc #: 3/PCE 1A
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,MEDIUM-GRAINED,
INTERSERTAL*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 0.5-1.5 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 2%)
Size(mm): 1-2 Morphology: SUBHEDRAL
OFTEN CORRODED,FRESH*
Groundmass - OLIVINE ( 4%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE (45-50%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE ( 30%)
Size(mm): 0.2-0.6 Morphology: ANHEDRAL
FRESH,2VZ=40;
OPAQUE MINERALS ( 5%)
Size(mm): 0.005-1 Morphology: SQUARE-LATH-SHAPED
MAGN-ILMENITE;
MICROCRYST GROUNDMASS (10-12%)
INTERSTITIAL MATERIAL,MOSTLY GLASSY TO MICROXLN,
PARTLY REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + SOME INTERSTITIAL MATERIAL REPLACED BY SMEC*
Vesicles -
Size(mm): 0.5-1
Percent: <1
Filling: SMEC
Shape: SUBROUND-
Shape: IRREGULAR
Leg : 65 Top/Bottom Interval(mm): 350/ 370 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 199.00 Rock Type: IGNEOUS
Core: 18 Sample Midpoint(m) : 199.36 Sect/Pc #: 1/PCE 5A
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,FINE-GRAINED,
INTERGRANULAR-INTERSERTAL*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 2%)
Size(mm): 1-2 Morphology: SUBHEDRAL,LATHS
FRESH*
Groundmass - OLIVINE ( 1-2%)
Size(mm): 0.2-0.3 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE (45-50%)
Size(mm): 0.2-0.4 Morphology: ACICULAR
FRESH;
CLINOPYROXENE (40-45%)
Size(mm): 0.1-0.3 Morphology: GRANULAR
FRESH,OFTEN POORLY CRYSTALLIZED;
OPAQUE MINERALS ( 5%)
Size(mm): 0.005-0.1 Morphology: SQUARE-LATH-LIKE
MAGN-ILMENITE*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL REPLACED BY SMEC;
CARBONATE
Location: VESICLES
Vesicles -
Size(mm): 1-2
Percent: 3-5
Filling: SMEC,CARB
Shape: SUBROUND
Leg : 65 Top/Bottom Interval(mm): 450/ 480 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 199.00 Rock Type: IGNEOUS
Core: 18 Sample Midpoint(m) : 202.47 Sect/Pc #: 3/PCE 6
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,FINE-GRAINED,INTERSERTAL-
INTERGRANULAR,SOMEWHAT VARIOLITIC*
Phenocrysts- OLIVINE ( 1-2%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 2-3%)
Size(mm): 1-2 Morphology: PRISMS,LATHS
SERIATE WITH GROUNDMASS,SOME XTLS CORRODED AND
MOST ZONED,FRESH*
Groundmass - OLIVINE ( 1-2%)
Size(mm): 0.3-0.5 Morphology: SUBHEDRAL,SKELETAL
OFTEN SKELETAL,REPLACED BY SMEC + MINOR CARB;
PLAGIOCLASE ( 45%)
Size(mm): 0.05-0.5 Morphology: SUBHEDRAL,LATHS
OFTEN IN CLOTS INTERGROWN WITH OL + CPX;
CLINOPYROXENE ( 30%)
Size(mm): 0.05-0.5 Morphology: GRANULAR-ACICULAR
FRESH,2VZ=45;
OPAQUE MINERALS ( 3-4%)
Size(mm): 0.005-0.2 Morphology: GRANULAR
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 10%)
INTERSTITIAL MATERIAL,GLASSY TO MICROXLN,PARTLY
REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + SOME INTERSTITIAL MATERIAL REPLACED BY SMEC*
Vesicles -
Size(mm): 1
Percent: 2-3
Filling: SMEC
Shape: ROUND
SOME SEGREGATION VESICLES*
Leg : 65 Top/Bottom Interval(mm): 1230/1250 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 204.00 Rock Type: IGNEOUS
Core: 19 Sample Midpoint(m) : 205.24 Sect/Pc #: 1/PCE 12B
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,MEDIUM-GRAINED,
INTERGRANULAR-INTERSERTAL*
Phenocrysts- PLAGIOCLASE ( 2-3%)
Size(mm): 1-2 Morphology: SUBHEDRAL
OFTEN ZONED,FRESH*
Groundmass - OLIVINE ( 2-3%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL
REPLACED BY SMEC + CARB;
PLAGIOCLASE (45-50%)
Size(mm): 0.2-1 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE (40-45%)
Size(mm): 0.1-0.5 Morphology: ANHEDRAL
FRESH,2VZ=45;
OPAQUE MINERALS ( 3-5%)
Size(mm): 0.005-0.1 Morphology: SQUARE
MAGN;
MICROCRYST GROUNDMASS ( 5-7%)
INTERSTITIAL MATERIAL,MOSTLY MICROXLN MATERIAL,
PARTLY REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + SOME INTERSTITIAL MATERIAL REPLACED BY SMEC +
MINOR CARB;
CARBONATE
Location: INTERSTITIAL Replacing: OL
OL + SOME INTERSTITIAL MATERIAL REPLACED BY SMEC +
MINOR CARB*
Vesicles -
Size(mm): 1-2
Percent: 1
Filling: SMEC
Shape: ROUND-
Shape: IRREGULAR
Leg : 65 Top/Bottom Interval(mm): 1220/1240 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 204.00 Rock Type: IGNEOUS
Core: 19 Sample Midpoint(m) : 206.73 Sect/Pc #: 2/PCE 6C
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): 0.3-0.6 Morphology: SUBHEDRAL
REPLACED BY SMEC,OFTEN IN GLOMEROPHYRIC CLUSTERS
WITH PLAG;
PLAGIOCLASE (10-12%)
Size(mm): 0.3-3.5 Morphology: EUHEDRAL-SUBHEDRAL
FRESH;
CLINOPYROXENE ( TR%)
Size(mm): 0.4-0.8 Morphology: ANHEDRAL
INTERGROWN WITH PLAG,FRESH*
Groundmass - MESOSTASIS ( 85%)
QUENCH MIXTURE OF ACICULAR PLAG + GRANULAR MAGN +
POORLY CRYSTALLIZED CPX,FRESH;
PLAGIOCLASE
Morphology: ACICULAR
QUENCH;
MAGNETITE
Morphology: GRANULAR
QUENCH;
CLINOPYROXENE
POORLY CRYSTALLIZED*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL REPLACED BY SMEC*
Vesicles -
Size(mm): 1
Percent: <1
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 510/ 530 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 204.00 Rock Type: IGNEOUS
Core: 19 Sample Midpoint(m) : 207.52 Sect/Pc #: 3/PCE 3A
ROCK = APHYRIC BASALT;
Texture: APHYRIC,MEDIUM- TO COARSE-GRAINED,OPHIMOTTLED*
Groundmass - OLIVINE ( 3%)
Size(mm): 0.5-1.5 Morphology: SUBHEDRAL
REPLACED BY SMEC + CARB;
PLAGIOCLASE (35-40%)
Size(mm): 0.5-2 Morphology: SUBHEDRAL,LATHS
IN GLOMEROPHYRIC CLOTS WITH CPX,FRESH,OFTEN ZONED;
CLINOPYROXENE (20-25%)
Size(mm): 0.2-1 Morphology: SUBHEDRAL-ANHEDRAL
IN SUBOPHITIC CLOTS WITH PLAG,FRESH,2VZ=45;
OPAQUE MINERALS ( 5%)
Size(mm): 0.05-0.3 Morphology: LATHS
MOSTLY LATHS,PROBABLY ILMENITE-MAGN,ALL IN
INTERSTITIAL AREAS;
MICROCRYST GROUNDMASS (25-30%)
INTERSTITIAL MATERIAL,MICROXLN MATERIAL
SURROUNDING CLOTS OF PLAG + CPX,PARTLY REPLACED BY
SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VEINLET
OL + SOME INTERSTITIAL MATERIAL REPLACED BY SMEC +
CARB,ONE VEINLET (1 MM WIDE) FILLED WITH GREENISH-
BROWN SMEC;
CARBONATE
Location: INTERSTITIAL Replacing: OL
OL + SOME INTERSTITIAL MATERIAL REPLACED BY SMEC +
CARB*
Vesicles -
Percent: 0
Leg : 65 Top/Bottom Interval(mm): 1370/1390 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 208.50 Rock Type: IGNEOUS
Core: 20 Sample Midpoint(m) : 211.38 Sect/Pc #: 2/PCE 10
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,FINE-GRAINED,INTERSERTAL-
INTERGRANULAR*
Phenocrysts- OLIVINE ( 1-2%)
Size(mm): 0.5-1 Morphology: EUHEDRAL-SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 2-3%)
Size(mm): 1-1.5 Morphology: SUBHEDRAL
STRONGLY ZONED,FRESH*
Groundmass - OLIVINE ( 1-2%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE (45-50%)
Size(mm): 0.2-1 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE (30-35%)
Size(mm): 0.1-0.4 Morphology: GRANULAR
FRESH,2VZ=45;
OPAQUE MINERALS ( 3-4%)
Size(mm): 0.005-0.1 Morphology: GRANULAR-LATH-SHAPED
MAGN-ILMENITE;
MICROCRYST GROUNDMASS (10-12%)
INTERSTITIAL MATERIAL,DARK BROWN GLASSY TO
MICROXLN MATERIAL,MINOR REPLACEMENT BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + MINOR INTERSTITIAL MATERIAL REPLACED BY SMEC*
Vesicles -
Size(mm): 0.5
Percent: TR
Filling: SMEC
Shape: ROUND
SOME WITH SEGREGATION PATCHES*
Leg : 65 Top/Bottom Interval(mm): 1000/1020 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 213.00 Rock Type: IGNEOUS
Core: 21 Sample Midpoint(m) : 215.51 Sect/Pc #: 2/PCE 6
ROCK = PLAG-CPX-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.5-1 Morphology: EUHEDRAL
REPLACED BY SMEC + CARB;
PLAGIOCLASE ( 10%)
Size(mm): 1-5 Morphology: SUBHEDRAL,PRISMS
FRESH,OFTEN IN CLOTS WITH CPX;
CLINOPYROXENE ( 2-3%)
Size(mm): 0.2-1 Morphology: ANHEDRAL-ROUNDED
FRESH,2VZ=45,SOMETIMES ZONED*
Groundmass - MESOSTASIS ( 85%)
QUENCH MIXTURE OF POORLY CRYSTALLIZED PLAG +
RADIATING SHEAVES OF CPX + MINUTE GRANULES OF
OP.MINS + GLASSY INTERSTITIAL MATERIAL,FRESH;
PLAGIOCLASE
POORLY CRYSTALLIZED;
CLINOPYROXENE
Morphology: RADIATING SHEAVES
QUENCH;
OPAQUE MINERALS
Morphology: GRANULES
MINUTE GRANULES*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL REPLACED BY SMEC*
Vesicles -
Size(mm): 0.2-0.5
Percent: <1
Filling: SMEC
Shape: ROUND
SOME SEGREGATION VESICLES*
Leg : 65 Top/Bottom Interval(mm): 1170/1190 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 217.50 Rock Type: IGNEOUS
Core: 22 Sample Midpoint(m) : 220.18 Sect/Pc #: 2/PCE 16
ROCK = PLAG-OL-CPX PHYRIC BASALT;
Texture: PORPHYRITIC,VERY FINE-GRAINED,INTERGRANULAR-
INTERGRANULAR*
Phenocrysts- OLIVINE ( 4%)
Size(mm): 0.3-1.5 Morphology: EUHEDRAL-SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 10%)
Size(mm): 0.3-3 Morphology: SUBHEDRAL
FRESH,OFTEN IN GLOMEROCRYSTS;
CLINOPYROXENE ( 3-4%)
Size(mm): 0.4-2.6 Morphology: ANHEDRAL-ROUNDED
OCCURS AS INDIVIDUAL ROUNDED XTLS AND IN
GLOMEROCRYSTS WITH PLAG,FRESH,2VZ=45,OFTEN SECTOR
ZONED*
Groundmass - OLIVINE ( 2-3%)
Size(mm): 0.1-0.2 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE (35-40%)
Size(mm): 0.1-0.4 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE (30-35%)
Size(mm): 0.1-0.3 Morphology: GRANULAR
FRESH;
OPAQUE MINERALS ( 3%)
Size(mm): 0.005-0.05 Morphology: GRANULES
PROBABLY MAGN;
MICROCRYST GROUNDMASS ( 5%)
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): 0.5
Percent: TR
Shape: ROUND
SEGREGATION VESICLES*
Leg : 65 Top/Bottom Interval(mm): 950/ 970 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 222.00 Rock Type: IGNEOUS
Core: 23 Sample Midpoint(m) : 222.96 Sect/Pc #: 1/PCE 5
ROCK = PLAG-CPX-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): 0.3-0.8 Morphology: EUHEDRAL-SUBHEDRAL
ALTERED TO SMEC;
PLAGIOCLASE ( 10%)
Size(mm): 0.5-2 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 4%)
Size(mm): 0.5-1 Morphology: ANHEDRAL
MOSTLY INTERGROWN WITH PLAG IN GLOMEROPHYRIC
CLOTS,FRESH,2VZ=45,OFTEN SECTOR ZONED*
Groundmass - MESOSTASIS (80-85%)
QUENCH MIXTURE OF PLAG MICROLITES + RADIATING
SHEAVES OF CPX + GRANULAR OP.MINS + A FEW GRAINS
OF FRESH OL;
PLAGIOCLASE
MICROLITES,QUENCH;
CLINOPYROXENE
Morphology: RADIATING SHEAVES
QUENCH;
OPAQUE MINERALS
Morphology: GRANULAR
QUENCH;
OLIVINE
Morphology: GRAINS
A FEW GRAINS OF FRESH OL*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL PARTLY REPLACED BY SMEC*
Vesicles -
Size(mm): 0.3-0.5
Percent: 1-2
Filling: SMEC
Shape: ROUND
SOME SEGREGATION VESICLES*
Leg : 65 Top/Bottom Interval(mm): 290/ 310 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 222.00 Rock Type: IGNEOUS
Core: 23 Sample Midpoint(m) : 225.30 Sect/Pc #: 3/PCE 3
ROCK = PLAG-CPX-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.2-0.4 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 5%)
Size(mm): 0.3-3 Morphology: SUBHEDRAL
FRESH,USUALLY ZONED;
CLINOPYROXENE ( 3%)
Size(mm): 0.3-0.8 Morphology: SUBHEDRAL
OFTEN IN GLOMEROPHYRIC CLOTS WITH PLAG,FRESH,
2VZ=45,OFTEN ZONED,SOME XTLS CORRODED*
Groundmass - MESOSTASIS ( 90%)
QUENCH MIXTURE OF PLAG MICROLITES + SMALL OL XTLS
+ RADIATING SHEAVES OF CPX + GRANULAR OP.MINS;
PLAGIOCLASE
MICROLITES,QUENCH;
OLIVINE
SMALL;
CLINOPYROXENE
Morphology: RADIATING SHEAVES
QUENCH;
OPAQUE MINERALS
Morphology: GRANULAR
QUENCH*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
Vesicles -
Size(mm): 0.05-0.5
Percent: 1
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 690/ 710 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 222.00 Rock Type: IGNEOUS
Core: 23 Sample Midpoint(m) : 227.20 Sect/Pc #: 4/PCE 9B
ROCK = PLAG-CPX-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.2-0.4 Morphology: EUHEDRAL
REPLACED BY SMEC + CARB;
PLAGIOCLASE ( 7-8%)
Size(mm): 0.5-2 Morphology: SUBHEDRAL,PRISMS
HIGHLY ZONED,FRESH;
CLINOPYROXENE ( 3-4%)
Size(mm): 0.5-1 Morphology: ANHEDRAL
USUALLY INTERGROWN WITH PLAG IN GLOMEROPHYRIC
CLOTS,FRESH,2VZ=45,USUALLY ZONED*
Groundmass - MESOSTASIS ( 85%)
POORLY CRYSTALLIZED MIXTURE OF PLAG MICROLITES +
RADIATING SHEAVES OF CPX + MINUTE GRANULES OF
OP.MINS + SOME INTERSTITIAL GLASS,FRESH;
PLAGIOCLASE
MICROLITES;
CLINOPYROXENE
Morphology: RADIATING SHEAVES
OPAQUE MINERALS
Morphology: GRANULES
MINUTE GRANULES;
GLASS
SOME INTERSTITIAL GLASS*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
Vesicles -
Size(mm): 0.5-0.8
Percent: TR
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 110/ 140 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 226.50 Rock Type: IGNEOUS
Core: 24 Sample Midpoint(m) : 228.13 Sect/Pc #: 2/PCE 1B
ROCK = PLAG-CPX-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): 0.4-1 Morphology: SUBHEDRAL
REPLACED BY SMEC + CARB;
PLAGIOCLASE ( 7%)
Size(mm): 0.3-2.5 Morphology: SUBHEDRAL
OFTEN IN CLUSTERS,FRESH,STRONGLY ZONED;
CLINOPYROXENE ( 3-4%)
Size(mm): 0.4-0.6 Morphology: ANHEDRAL-ROUNDED
USUALLY IN GLOMEROPHYRIC CLOTS WITH PLAG,FRESH,
2VZ=45*
Groundmass - MESOSTASIS ( 85%)
QUENCH MIXTURE OF SKELETAL PLAG MICROLITES +
RADIATING SHEAVES OF CPX + GRANULAR OP.MINS +
MINOR GLASS,FRESH;
PLAGIOCLASE
Morphology: SKELETAL
SKELETAL MICROLITES;
CLINOPYROXENE
Morphology: RADIATING SHEAVES
QUENCH;
OPAQUE MINERALS
Morphology: GRANULAR
QUENCH;
GLASS
MINOR*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL REPLACED BY SMEC + CARB;
CARBONATE
Location: VESICLES Replacing: OL
OL REPLACED BY SMEC + CARB*
Vesicles -
Size(mm): 0.5-1
Percent: 1-2
Filling: SMEC,CARB
SOME WITH SEGREGATION PATCHES*
Leg : 65 Top/Bottom Interval(mm): 80/ 100 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 231.00 Rock Type: IGNEOUS
Core: 25 Sample Midpoint(m) : 234.09 Sect/Pc #: 3/PCE 2
ROCK = PLAG-CPX-OL PHYRIC BASALT;
Texture: PORPHYRITIC,FINE-GRAINED,INTERGRANULAR-
INTERSERTAL*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.4-0.8 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 8-10%)
Size(mm): 0.4-1
SERIATE WITH GROUNDMASS,FRESH,SOME CLOTS WITH CPX;
CLINOPYROXENE ( 3%)
Size(mm): 0.4-1 Morphology: ANHEDRAL
FRESH,OFTEN IN CLOTS WITH PLAG,2VZ=45*
Groundmass - OLIVINE ( 1-2%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 40%)
Size(mm): 0.2-0.4 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 30%)
Size(mm): 0.05-0.3 Morphology: GRANULAR-RADIATING SHEAVES
FRESH,2VZ=45;
OPAQUE MINERALS ( 2-3%)
Size(mm): 0.005-0.1 Morphology: GRANULAR-LATH-SHAPED
MAGN-ILMENITE;
MICROCRYST GROUNDMASS ( 10%)
INTERSTITIAL MATERIAL,PARTLY REPLACED BY SMEC*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL REPLACED BY SMEC*
Vesicles -
Size(mm): 0.5
Percent: <1
Filling: SMEC
Shape: ROUND
FILLED WITH BROWN SMEC*
Leg : 65 Top/Bottom Interval(mm): 960/1000 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 235.50 Rock Type: IGNEOUS
Core: 26 Sample Midpoint(m) : 237.98 Sect/Pc #: 2/PCE 14
ROCK = PLAG-CPX-OL PHYRIC BASALT;
Texture: PORPHYRITIC,FINE-GRAINED,INTERSERTAL*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.4-0.6 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 8-10%)
Size(mm): 0.5-2
SERIATE WITH GROUNDMASS,OFTEN IN GLOMEROPHYRIC
CLOTS WITH CPX,STRONGLY ZONED,FRESH;
CLINOPYROXENE ( 3-4%)
Size(mm): 0.3-0.8 Morphology: SUBHEDRAL
OCCURS MOSTLY IN GLOMEROPHYRIC CLOTS WITH PLAG BUT
THERE ARE SOME INDIVIDUAL CORRODED XTLS,FRESH,
2VZ=45*
Groundmass - OLIVINE ( 2%)
Size(mm): 0.1-0.2 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 40%)
Size(mm): 0.1-0.5 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 20%)
Size(mm): 0.1-0.3 Morphology: GRANULAR-RADIATING SHEAVES
FRESH,2VZ=45;
OPAQUE MINERALS ( 2-3%)
Size(mm): 0.005-0.1 Morphology: GRANULAR-LATH-SHAPED
MAGN-ILMENITE;
MICROCRYST GROUNDMASS ( 20%)
INTERSTITIAL MATERIAL,PARTLY REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + SOME INTERSTITIAL MATERIAL REPLACED BY SMEC*
Vesicles -
Size(mm): 0.3-0.5
Percent: 1-2
Filling: SMEC
Shape: ROUND
FILLED WITH BROWN SMEC,A FEW SEGREGATION VESICLES*
Leg : 65 Top/Bottom Interval(mm): 1450/1470 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 235.50 Rock Type: IGNEOUS
Core: 26 Sample Midpoint(m) : 238.46 Sect/Pc #: 2/PCE 17C
ROCK = PLAG-CPX-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH*
Phenocrysts- OLIVINE ( 1-2%)
Size(mm): 0.3-0.8 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 8-10%)
Size(mm): 0.3-1.5 Morphology: SUBHEDRAL,LATHS
OFTEN INTERGROWN WITH CPX,FRESH;
CLINOPYROXENE ( 2%)
Size(mm): 0.2-0.8 Morphology: SUBHEDRAL
INTERGROWN WITH PLAG,FRESH,2VZ=45*
Groundmass - MESOSTASIS (85-90%)
QUENCH MIXTURE OF PLAG MICROLITES + SHEAVES OF CPX
+ GRANULAR OP.MINS + ABUNDANT DARK BROWN GLASS,
FRESH;
PLAGIOCLASE
MICROLITES;
CLINOPYROXENE
Morphology: SHEAVES
QUENCH;
OPAQUE MINERALS
Morphology: GRANULAR
QUENCH;
GLASS
ABUNDANT DARK BROWN GLASS*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL REPLACED BY SMEC*
Vesicles -
Size(mm): 0.4
Percent: <1
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 850/ 870 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 240.00 Rock Type: IGNEOUS
Core: 27 Sample Midpoint(m) : 243.86 Sect/Pc #: 3/PCE 1H
ROCK = APHYRIC BASALT;
Texture: APHYRIC,MEDIUM- TO COARSE-GRAINED,INTERGRANULAR-
INTERSERTAL*
Groundmass - OLIVINE ( 2-3%)
Size(mm): 0.2-0.6 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE (40-45%)
Size(mm): 0.2-1.5 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE (35-40%)
Size(mm): 0.2-2 Morphology: PLATES
OFTEN IN SUBOPHITIC PLATES,FRESH,2VZ=45;
OPAQUE MINERALS ( 3-4%)
Size(mm): 0.05-0.7 Morphology: SQUARE XTLS-LATHS
MAGN-ILMENITE;
MICROCRYST GROUNDMASS ( 15%)
INTERSTITIAL MATERIAL,GLASSY TO DEVITRIFIED,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
FILLED WITH BROWN SMEC*
Leg : 65 Top/Bottom Interval(mm): 660/ 680 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 244.50 Rock Type: IGNEOUS
Core: 28 Sample Midpoint(m) : 245.17 Sect/Pc #: 1/PCE 4B
ROCK = APHYRIC BASALT;
Texture: APHYRIC,MEDIUM-GRAINED, INTERSERTAL*
Groundmass - OLIVINE ( 2-3%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL
PARTLY REPLACED BY SMEC,SOME FRESH REMNANTS;
PLAGIOCLASE (35-40%)
Size(mm): 0.2-1.5 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE (30-35%)
Size(mm): 0.2-0.8 Morphology: ANHEDRAL
INTERGROWN WITH PLAG,FRESH,2VZ=45;
OPAQUE MINERALS ( 3-4%)
Size(mm): 0.05-0.5 Morphology: SQUARE XTLS-LATHS
MAGN-ILMENITE,OCCURS IN INTERSTITIAL PATCHES;
MICROCRYST GROUNDMASS ( 20%)
INTERSTITIAL MATERIAL,GLASSY TO MICROXLN,IN LARGE
IRREGULAR PATCHES,PARTLY REPLACED BY SMEC,MOSTLY
FRESH*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
OL + INTERSTITIAL MATERIAL PARTLY REPLACED BY
SMEC*
Vesicles -
Size(mm): TO 0.5
Percent: <1
Filling: SMEC
Shape: ROUND-
Shape: IRREGULAR
FILLED WITH BROWN SMEC*
Leg : 65 Top/Bottom Interval(mm): 310/ 340 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 253.50 Rock Type: IGNEOUS
Core: 30 Sample Midpoint(m) : 253.83 Sect/Pc #: 1/PCE 4A
ROCK = PLAG-OL-CPX PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH*
Phenocrysts- OLIVINE ( 3%)
Size(mm): 0.5-4 Morphology: SUBHEDRAL
OFTEN CORRODED,REPLACED BY SMEC + MINOR CARB;
PLAGIOCLASE ( 8%)
Size(mm): 0.3-2 Morphology: EUHEDRAL-SUBHEDRAL
FRESH,SOMETIMES IN GLOMEROPHYRIC CLUSTERS;
CLINOPYROXENE ( 1-2%)
Size(mm): 0.1-0.5
INTERGROWN WITH PLAG,FRESH,2VZ=45*
Groundmass - MESOSTASIS (85-90%)
QUENCH MIXTURE OF PLAG MICROLITES + SHEAVES OF CPX
+ GRANULAR OP.MINS + INTERSTITIAL GLASS;
PLAGIOCLASE
MICROLITES;
CLINOPYROXENE
Morphology: SHEAVES
QUENCH;
OPAQUE MINERALS
Morphology: GRANULAR
QUENCH;
GLASS
INTERSTITIAL*
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 0.4
Percent: 1
Filling: SMEC
Shape: ROUND
FILLED WITH BROWN SMEC*
Leg : 65 Top/Bottom Interval(mm): 860/ 890 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 258.00 Rock Type: IGNEOUS
Core: 31 Sample Midpoint(m) : 260.38 Sect/Pc #: 2/PCE 7A
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH*
Phenocrysts- OLIVINE ( 3-5%)
Size(mm): 0.3-2 Morphology: EUHEDRAL-SUBHEDRAL
ALTERED TO SMEC + CARB;
PLAGIOCLASE ( 5-7%)
Size(mm): 0.2-3 Morphology: SUBHEDRAL
FRESH*
Groundmass - MESOSTASIS ( 90%)
QUENCH GROUNDMASS--MOSTLY BROWN GLASS WITH MINOR
PLAG MICROLITES + GRANULAR OP.MINS + POORLY
CRYSTALLIZED CPX,FRESH;
GLASS
GROUNDMASS IS MOSTLY BROWN GLASS;
PLAGIOCLASE
MINOR,MICROLITES;
OPAQUE MINERALS
Morphology: GRANULAR
MINOR;
CLINOPYROXENE
MINOR,POORLY CRYSTALLIZED*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL REPLACED + SMEC + CARB;
CARBONATE
Replacing: OL
OL REPLACED BY SMEC + CARB*
Vesicles -
Size(mm): TO 0.6
Percent: <1
Filling: SMEC
Shape: ROUND
FILLED WITH BROWN SMEC*
Leg : 65 Top/Bottom Interval(mm): 1350/1370 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 262.50 Rock Type: IGNEOUS
Core: 32 Sample Midpoint(m) : 263.86 Sect/Pc #: 1/PCE 5E
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,FINE-GRAINED,INTERSERTAL*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): 0.3-1.1 Morphology: SUBHEDRAL
REPLACED BY SMEC + CARB;
PLAGIOCLASE ( 7-8%)
Size(mm): 0.5-2 Morphology: SKELETAL
SERIATE WITH GROUNDMASS,FRESH*
Groundmass - OLIVINE ( 1-2%)
Size(mm): 0.05-0.2 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE (30-35%)
Size(mm): 0.1-0.5 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE (30-35%)
Size(mm): 0.05-0.4 Morphology: ANHEDRAL
FRESH,2VZ=45;
OPAQUE MINERALS ( 3-4%)
Size(mm): 0.05-0.3 Morphology: SQUARE XTLS-LATHS
MAGN-ILMENITE;
MICROCRYST GROUNDMASS (15-20%)
INTERSTITIAL MATERIAL,DEVITRIFIED GLASS,MOSTLY
FRESH;
GLASS
INTERSTITIAL,DEVITRIFIED*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL REPLACED BY SMEC + CARB;
CARBONATE
Replacing: OL
OL REPLACED BY SMEC + CARB*
Vesicles -
Size(mm): TO 1
Percent: <1
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 630/ 650 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 262.50 Rock Type: IGNEOUS
Core: 32 Sample Midpoint(m) : 266.14 Sect/Pc #: 3/PCE 7
ROCK = PLAG-CPX-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.2-1 Morphology: SUBHEDRAL
REPLACED BY SMEC;
PLAGIOCLASE ( 5-7%)
Size(mm): 0.3-1.5 Morphology: SUBHEDRAL,LATHS
FRESH;
CLINOPYROXENE ( 3%)
Size(mm): 0.2-0.4 Morphology: ANHEDRAL
INTERGROWN IN CLOTS WITH PLAG,FRESH,2VZ=45*
Groundmass - MESOSTASIS (85-90%)
MOSTLY DEVITRIFIED GLASS WITH MINOR PLAG
MICROLITES + GRANULAR OP.MINS;
GLASS
GROUNDMASS IS MOSTLY DEVITRIFIED GLASS;
PLAGIOCLASE
MINOR,MICROLITES;
OPAQUE MINERALS
Morphology: GRANULAR
MINOR*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
OL ALTERED TO SMEC*
Vesicles -
Size(mm): 0.4-0.8
Percent: 2
Filling: SMEC
Shape: ROUND
Leg : 65 Top/Bottom Interval(mm): 10/ 30 Describer: Robinson, P.
Hole: 483B Top of Core Depth(m) : 146.50 Rock Type: IGNEOUS
Core: B 1 Sample Midpoint(m) : 146.52 Sect/Pc #: /PCE 1
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,MEDIUM-GRAINED,
INTERSERTAL-SUBOPHITIC;
Where sampled: PILLOW INTERIOR OR FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL
PARTLY REPLACED BY SMEC;
PLAGIOCLASE ( 5%)
Size(mm): 1-10 Morphology: SUBHEDRAL
OFTEN CORRODED,STRONGLY ZONED,FRESH;
CLINOPYROXENE ( <1%)
Size(mm): 0.2-0.5
FRESH*
Groundmass - OLIVINE ( 3%)
Size(mm): 0.1-0.5 Morphology: SUBHEDRAL
MOSTLY REPLACED BY SMEC;
PLAGIOCLASE (35-40%)
Size(mm): 0.3-1 Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE (30-35%)
Size(mm): 0.2-0.5 Morphology: ANHEDRAL
OFTEN SUBOPHITIC,FRESH,2VZ=45;
OPAQUE MINERALS ( 3%)
Morphology: SUBHEDRAL,GRAINS
MINUTE SUBHEDRAL GRAINS IN INTERSTITIAL PATCHES;
MICROCRYST GROUNDMASS (15-20%)
INTERSTITIAL MATERIAL,MOSTLY GLASSY,PARTLY
REPLACED BY SMEC*
Alteration - SMECTITE
Location: INTERSTITIAL, Replacing: OL
Location: VESICLES
SOME OL + INTERSTITIAL MATERIAL REPLACED BY SMEC;
CARBONATE
Location: VESICLES
Vesicles -
Size(mm): 0.2-0.4
Percent: 1
Filling: SMEC,CARB
Shape: ROUND
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