Leg : 52 Top/Bottom Interval(mm): 460/ 480 Describer: Swanson, D.
Hole: 418A Top of Core Depth(m) : 320.00 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 320.47 Sect/Pc #: 1/PCE 1B
ROCK = PLAG-OL MODERATELY PHYRIC BASALT
SHIPBOARD DESCRIPTION (UNEDITED);
Texture: MODERATELY PORPHYRITIC,QUENCH;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( TR%)
Size(mm): TO 0.3 Morphology: EUHEDRAL
REPLACED BY SMEC + CALCITE;
PLAGIOCLASE ( 7%)
Size(mm): TO 3 Morphology: EUHEDRAL-SUBHEDRAL
SINGLE XTLS + CLOTS*
Groundmass - OLIVINE ( 3%)
Size(mm): <0.1 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 45%)
Size(mm): TO 0.3 Morphology: SKELETAL,ELONGATE
CLINOPYROXENE ( 40%)
Size(mm): TO 0.05 Morphology: RADIATING SHEAVES-GRANULAR,
Morphology: ANHEDRAL
MAGNETITE ( 5%)
Size(mm): 0.05
GLASS ( 0%)
Alteration - CALCITE ( 2%)
Location: VESICLES,OL Replacing: OL
SMECTITE ( 3%)
Location: VESICLES,OL Replacing: OL
Vesicles -
Size(mm): <1
Percent: 1
Filling: CALCITE,SMEC
Leg : 52 Top/Bottom Interval(mm): 140/ 160 Describer: Pertsev, N.
Hole: 418A Top of Core Depth(m) : 320.00 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 321.65 Sect/Pc #: 2/PCE 2
ROCK = CHALK-BASALT CONTACT
SHIPBOARD DESCRIPTION (UNEDITED);
Where sampled: GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE
Size(mm): 0.3
Groundmass - GLASS
RATHER FRESH*
Alteration - CALCITE
Location: VEIN
A VEIN OF COARSE-GRAINED CALCITE CUTS THE CHALK
NEAR THE CONTACT;
CLAY MINERALS
Location: CHALK Replacing: GLASS
CHALK HAS ABOUT 15% SPOTS (UP TO 0.07 MM) OF CLAY
MINS OF THE KAOLINITE GROUP. SOME SPOTS LOOK LIKE
PSEUDOMORPHS AFTER A PRISMATIC MINERAL. IN THE
VERY CONTACT CHALK IS ENRICHED BY CLAY.MINS AND
RECRYSTALLIZED A LITTLE;
PYRITE ( <0.5%)
Leg : 52 Top/Bottom Interval(mm): 310/ 330 Describer: Byerly, G.
Hole: 418A Top of Core Depth(m) : 320.00 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 324.82 Sect/Pc #: 4/PCE 2B
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,FINE QUENCH;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( <1%)
Size(mm): TO 1 Morphology: EUHEDRAL
COMPLETELY ALTERED;
PLAGIOCLASE ( 5%)
Size(mm): TO 4 Morphology: EUHEDRAL
PARTIALLY ALTERED,ZONED,INCLUSIONS*
Groundmass - OLIVINE ( <1%)
Size(mm): 0.2 Morphology: EUHEDRAL
PLAGIOCLASE ( 35%)
Size(mm): TO 0.5 Morphology: NEEDLES,SKELETAL
SERIATE;
CLINOPYROXENE ( 60%)
Size(mm): TO 0.5 Morphology: RADIATING SHEAVES,FIBROUS
Morphology: BUNDLES
OPAQUE MINERALS ( 5%)
Size(mm): <0.02 Morphology: EUHEDRAL
Alteration - CARBONATE
Location: VESICLES,OL, Replacing: OL
Location: VEINS
SMECTITE
Location: VESICLES,OL, Replacing: OL
Location: VEINS
ZEOLITE
Replacing: PLAG
IDENTITY OF ZEOLITE UNCERTAIN,PLAG ONLY PARTLY
ALTERED;
SULFIDE
Location: VEINS
MINOR SULFIDE IN VEINS*
Vesicles -
Size(mm): TO 0.25
Percent: 1
Filling: CALCITE,SMEC
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 210/ 230 Describer: Ricou, L.
Hole: 418A Top of Core Depth(m) : 329.50 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 329.72 Sect/Pc #: 1/PCE 2A
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): TO 2 Morphology: EUHEDRAL
ALTERED TO SMEC;
PLAGIOCLASE ( 8%)
Size(mm): TO 4 Morphology: EUHEDRAL,TABLETS
ALTERATION PROBABLY ON GLASS INCLUSIONS*
Groundmass - PLAGIOCLASE ( 12%)
Size(mm): 0.5 Morphology: ACICULAR,SKELETAL
TWO TYPES PRESENT--SKELETAL + ASSOCIATED WITH
PLUMOSE CPX;
CLINOPYROXENE ( 72%)
Morphology: RADIATING SHEAVES
OPAQUE MINERALS ( 5%)
Size(mm): TO 0.02 Morphology: EUHEDRAL,CUBIC
ASSOCIATION OF MAGN + ILMENITE IN CUBIC SHAPE*
Alteration - CARBONATE
Location: VESICLES
SMECTITE
Location: VESICLES Replacing: OL
Vesicles -
Size(mm): TO 0.5
Percent: 2
Filling: SMEC,CARB
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 1180/1200 Describer: Pertsev, N.
Hole: 418A Top of Core Depth(m) : 329.50 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 330.69 Sect/Pc #: 1/PCE 2F
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): TO 3 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 7%)
Size(mm): TO 3 Morphology: EUHEDRAL
Groundmass - OLIVINE ( 1%)
Size(mm): 0.3 Morphology: SUBHEDRAL
PLAGIOCLASE ( 20%)
Size(mm): 0.7 Morphology: LATHS,EUHEDRAL
CLINOPYROXENE ( 67%)
Morphology: RADIATING SHEAVES,SUBHEDRAL
OPAQUE MINERALS ( 3%)
Size(mm): 0.05 Morphology: EUHEDRAL
Alteration - CARBONATE
Replacing: OL
SMECTITE
Location: VESICLES Replacing: OL
ZEOLITE
Replacing: PLAG
IDENTITY FOR ZEOLITE UNCERTAIN,PLAG ONLY PARTLY
ALTERED*
Vesicles -
Size(mm): 0.2
Percent: 1
Filling: SMEC
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 690/ 720 Describer: Swanson, D.
Hole: 418A Top of Core Depth(m) : 329.50 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 331.71 Sect/Pc #: 2/PCE 1C
ROCK = PLAG-OL MODERATELY PHYRIC BASALT
SHIPBOARD DESCRIPTION (UNEDITED);
Texture: MODERATELY PORPHYRITIC,QUENCH;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( TR%)
Size(mm): <0.5 Morphology: EUHEDRAL
REPLACED BY SMECTITE;
PLAGIOCLASE ( 7-10%)
Size(mm): TO 2 Morphology: EUHEDRAL-SUBHEDRAL
Groundmass - OLIVINE ( 1-2%)
Morphology: QUENCH
PLAGIOCLASE ( 45%)
Morphology: QUENCH
CLINOPYROXENE ( 45%)
Morphology: QUENCH
Alteration - CARBONATE ( TR%)
SMECTITE ( 5-7%)
Location: VESICLES Replacing: OL
Vesicles -
Size(mm): <0.3
Percent: 2
Filling: SMEC
Shape: ROUND,
Shape: IRREGULAR
SMEC FILLING IS LIGHT BROWN*
Leg : 52 Top/Bottom Interval(mm): 990/1020 Describer: Ricou, L.
Hole: 418A Top of Core Depth(m) : 329.50 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 332.01 Sect/Pc #: 2/PCE 1D
ROCK = PLAG PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 15%)
Size(mm): TO 3 Morphology: SUBHEDRAL
BADLY ALTERED,ZONED*
Groundmass - OLIVINE ( 2%)
Size(mm): 0.3 Morphology: SUBHEDRAL
PLAGIOCLASE ( 25%)
Size(mm): TO 0.8 Morphology: LATHS,NEEDLES
TWO TYPES--LATHS + NEEDLES ASSOCIATED WITH CPX
AND MAGN;
CLINOPYROXENE ( 68%)
Morphology: SHEAVES,NEEDLES,GRAINS
POORLY CRYSTALLIZED;
OPAQUE MINERALS ( 5%)
Size(mm): 0.01 Morphology: GRANULAR,CUBIC
INCLUDES MAGN + ILMENITE COMPOSITE CRYSTALS*
Alteration - CARBONATE
Location: VESICLES, Replacing: OL
Location: VEINS
SMECTITE
Location: VESICLES, Replacing: OL
Location: VEINS
ZEOLITE
Location: VESICLES,
Location: VEINS
Vesicles -
Size(mm): TO 0.7
Percent: 3
Filling: SMEC,CARB,
Shape: ROUND
Filling: ZEOLITE
Leg : 52 Top/Bottom Interval(mm): 330/ 350 Describer: Swanson, D.
Hole: 418A Top of Core Depth(m) : 332.50 Rock Type: IGNEOUS
Core: 17 Sample Midpoint(m) : 332.84 Sect/Pc #: 1/PCE 2A
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 5%)
Size(mm): TO 2.5 Morphology: EUHEDRAL
SOME GLOMEROCRYSTS*
Groundmass - OLIVINE ( 1%)
Size(mm): 0.3 Morphology: SUBHEDRAL
PLAGIOCLASE ( 25%)
Size(mm): TO 0.7 Morphology: SKELETAL
CLINOPYROXENE ( 64%)
Morphology: SHEAVES
POORLY CRYSTALLIZED;
OPAQUE MINERALS ( 2%)
Size(mm): 0.01 Morphology: EUHEDRAL
Alteration - CALCITE
Location: VESICLES
SMECTITE
Replacing: OL
Vesicles -
Size(mm): 0.7
Percent: 3
Filling: CALCITE
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 1390/1410 Describer: Byerly, G.
Hole: 418A Top of Core Depth(m) : 332.50 Rock Type: IGNEOUS
Core: 17 Sample Midpoint(m) : 338.40 Sect/Pc #: 4/PCE 4C
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 0.6 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 12%)
Size(mm): TO 3 Morphology: EUHEDRAL
GLOMEROCRYSTS*
Groundmass - OLIVINE ( 2%)
Size(mm): 0.3 Morphology: SUBHEDRAL
SERIATE,ALTERED;
PLAGIOCLASE ( 30%)
Size(mm): 0.5 Morphology: LATHS,NEEDLES
SERIATE;
CLINOPYROXENE ( 45%)
Morphology: RADIATING SHEAVES,
Morphology: CHAINS-FIBROUS
OPAQUE MINERALS ( 3%)
Size(mm): 0.01 Morphology: EUHEDRAL
GLASS ( 6%)
Morphology: INTERSTITIAL
ALTERED*
Alteration - CARBONATE
Location: VESICLES
SMECTITE
Location: VESICLES Replacing: OL,GLASS
Vesicles -
Size(mm): TO 0.7
Percent: 2
Filling: SMEC,CARB
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 480/ 500 Describer: Swanson, D.
Hole: 418A Top of Core Depth(m) : 339.00 Rock Type: IGNEOUS
Core: 18 Sample Midpoint(m) : 343.99 Sect/Pc #: 4/PCE 1B
ROCK = PLAG-OL MODERATELY PHYRIC BASALT
SHIPBOARD DESCRIPTION (UNEDITED);
Texture: MODERATELY PORPHYRITIC,COARSE-GRAINED;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 0.1%)
Size(mm): 1 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 2.8%)
Size(mm): 2.5 Morphology: EUHEDRAL-SUBHEDRAL
HARD TO TELL FROM GROUNDMASS;
CLINOPYROXENE ( 0%)
Groundmass - OLIVINE ( 3.8%)
Size(mm): 0.3 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 41.1%)
Size(mm): 0.2-0.6 Morphology: EUHEDRAL
CLINOPYROXENE ( 33.3%)
Size(mm): 0.5 Morphology: ANHEDRAL
SUBOPHITIC;
MAGNETITE ( 4.1%)
Size(mm): 0.1-0.05
GLASS ( 14%)
SULFIDE ( TR%)
Alteration - CARBONATE ( TR%)
CLAY MINERALS ( 5%)
Location: VESICLES Replacing: OL,GLASS
Vesicles -
Size(mm): 0.5
Percent: 0.3
Filling: SMEC,CARB
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 330/ 350 Describer: Ricou, L.
Hole: 418A Top of Core Depth(m) : 339.00 Rock Type: IGNEOUS
Core: 18 Sample Midpoint(m) : 345.34 Sect/Pc #: 5/PCE 2C
ROCK = PLAG PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 15%)
Size(mm): TO 3 Morphology: EUHEDRAL,TABLETS-LATHS
Groundmass - OLIVINE ( 3%)
Size(mm): 0.3 Morphology: SUBHEDRAL
PLAGIOCLASE ( 25%)
Size(mm): TO 0.5 Morphology: ACICULAR,LATHS
CLINOPYROXENE ( 50%)
Morphology: RADIATING SHEAVES,PLUMOSE
POORLY CRYSTALLIZED;
OPAQUE MINERALS ( 6%)
Size(mm): 0.02 Morphology: EUHEDRAL,CUBIC
INCLUDES COMPLEX CRYSTALS OF MAGN + ILMENITE IN
CUBIC SHAPE*
Alteration - CARBONATE
Location: VESICLES,VUGS
SMECTITE
Location: VESICLES,VUGS Replacing: OL
ZEOLITE
Location: VESICLES,VUGS Replacing: PLAG
IDENTITY UNCERTAIN FOR ZEOLITE,PLAG ONLY PARTLY
ALTERED*
Vesicles -
Size(mm): TO 0.8
Percent: 1
Filling: SMEC,CARB,
Shape: ROUND
Filling: ZEOLITE
SEVERAL LARGE VUGS TO 2 CM*
Leg : 52 Top/Bottom Interval(mm): 940/ 960 Describer: Emmermann, R.
Hole: 418A Top of Core Depth(m) : 339.00 Rock Type: IGNEOUS
Core: 18 Sample Midpoint(m) : 345.95 Sect/Pc #: 5/PCE 4A
ROCK = APHYRIC BASALT;
Texture: QUENCH;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): TO 1.5 Morphology: SUBHEDRAL
Groundmass - OLIVINE ( <1%)
Size(mm): 0.3 Morphology: SUBHEDRAL
PLAGIOCLASE ( 12%)
Size(mm): TO 0.5 Morphology: ACICULAR
CLINOPYROXENE ( 85%)
Morphology: RADIATING SHEAVES
OPAQUE MINERALS ( 2%)
Size(mm): 0.01 Morphology: GRANULAR
Alteration - CARBONATE
Location: VESICLES Replacing: OL
Vesicles -
Size(mm): 0.5
Percent: <1
Filling: CARB
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 1180/1220 Describer: Byerly, G.
Hole: 418A Top of Core Depth(m) : 339.00 Rock Type: IGNEOUS
Core: 18 Sample Midpoint(m) : 347.70 Sect/Pc #: 6/PCE 3E
ROCK = PLAG-OL PHYRIC BASALT
SHIPBOARD DESCRIPTION (UNEDITED);
Texture: PORPHYRITIC,INTERSERTAL,QUENCH;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): <0.5 Morphology: EUHEDRAL
CLUSTERS WITH PLAG;
PLAGIOCLASE ( 6%)
Size(mm): <3 Morphology: EUHEDRAL-ROUND
CLOTS TO 5 MM,ZONED*
Groundmass - OLIVINE ( 2%)
Morphology: EUHEDRAL
SERIATE;
PLAGIOCLASE ( 40%)
Morphology: NEEDLES
SERIATE;
CLINOPYROXENE ( 35%)
Size(mm): <0.06 Morphology: RADIAL BUNDLES
MAGNETITE ( 5%)
Size(mm): <0.04 Morphology: EUHEDRAL
GLASS ( 10%)
ALTERED TO SMECTITE*
Alteration - CARBONATE ( <1%)
Location: VESICLE
ONLY IN ONE VESICLE;
CLAY MINERALS ( 14%)
Location: VESICLES Replacing: OL,GLASS
Vesicles -
Size(mm): <0.5
Percent: 1
Filling: SMEC,CARB
MOSTLY FILLED WITH SMEC--ONLY ONE WITH CARB*
Leg : 52 Top/Bottom Interval(mm): 1300/ 0 Describer: Pertsev, N.
Hole: 418A Top of Core Depth(m) : 348.00 Rock Type: IGNEOUS
Core: 19 Sample Midpoint(m) : 349.30 Sect/Pc #: 1/PCE 2A
ROCK = PLAG PHYRIC BASALT
SHIPBOARD DESCRIPTION (UNEDITED);
COMPLEX VEIN CONTACT--VEIN CONSISTS OF SILICA
SPHERULES (RI=1.545) IN CENTRAL PART AND COARSE
GRAINED CALCITE WITH SOME SMECTITE AND MAGNETITE;
Texture: PORPHYRITIC,INTERSERTAL;
Where sampled: NEXT TO GLASSY MARGIN,FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 30%)
Size(mm): 3 Morphology: LATHS
Groundmass - OLIVINE ( 10%)
Size(mm): TO 0.4
ALTERED;
PLAGIOCLASE ( 20%)
UP TO 4 MM IN LENGTH MICROLITES;
CLINOPYROXENE ( 20%)
Size(mm): TO 0.5
MAGNETITE ( 5%)
GLASS ( 15%)
ALTERED*
Alteration - CARBONATE
Location: VEIN Replacing: OL,AUGITE,PLAG
ALTERATION INCREASES TOWARD THE VEIN CONTACT;
CLAY MINERALS
Location: VEIN Replacing: OL,AUGITE,PLAG
ALTERATION INCREASES TOWARD THE VEIN CONTACT*
Leg : 52 Top/Bottom Interval(mm): 1020/1050 Describer: Swanson, D.
Hole: 418A Top of Core Depth(m) : 348.00 Rock Type: IGNEOUS
Core: 19 Sample Midpoint(m) : 353.54 Sect/Pc #: 4/PCE 1K
ROCK = PLAG PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 10%)
Size(mm): TO 3 Morphology: EUHEDRAL
Groundmass - OLIVINE ( 3%)
Size(mm): 0.3 Morphology: EUHEDRAL
PLAGIOCLASE ( 10%)
Size(mm): TO 0.5 Morphology: SKELETAL LATHS
CLINOPYROXENE ( 72%)
Morphology: RADIATING SHEAVES
OPAQUE MINERALS ( 5%)
Size(mm): 0.01 Morphology: GRANULAR
Alteration - CALCITE
Location: VESICLES
SMECTITE
Replacing: OL
Vesicles -
Size(mm): 0.2
Percent: <1
Filling: CALCITE
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 1230/ 0 Describer: Emmermann, R.
Hole: 418A Top of Core Depth(m) : 348.00 Rock Type: IGNEOUS
Core: 19 Sample Midpoint(m) : 358.23 Sect/Pc #: 7/PCE 3E
ROCK = PLAG-OL PHYRIC BASALT
SHIPBOARD DESCRIPTION (UNEDITED);
Texture: PORPHYRITIC,INTERSERTAL,QUENCH;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): <0.8 Morphology: EUHEDRAL
COMPLETELY ALTERED;
PLAGIOCLASE ( 10%)
Size(mm): <3.0 Morphology: SUBHEDRAL LATHS + CLOTS
Groundmass - OLIVINE ( 1%)
Morphology: EUHEDRAL
PLAGIOCLASE ( 45%)
Morphology: LATHS
USUALLY SWALLOWTAIL;
CLINOPYROXENE ( 35%)
Morphology: GRAINS,RADIAL BUNDLES
MAGNETITE ( 5%)
Morphology: ARROWHEAD
Alteration - CLAY MINERALS
Location: OL,VESICLES Replacing: OL
Vesicles -
Size(mm): 0.1-0.8
Percent: 2
Filling: SMEC
Leg : 52 Top/Bottom Interval(mm): 770/ 0 Describer: Ricou, L.
Hole: 418A Top of Core Depth(m) : 357.00 Rock Type: IGNEOUS
Core: 20 Sample Midpoint(m) : 363.77 Sect/Pc #: 5/PCE 3
ROCK = BASALTIC GLASS
SHIPBOARD DESCRIPTION (UNEDITED);
Texture: VITROPHYRIC
INTERFLOW CONSISTS MAINLY OF CALCITE + CLAYS +
Where sampled: GLASSY MARGIN,CARBONATE FILLED INTERFLOW
SOME QUARTZ*
Phenocrysts- PLAGIOCLASE ( 5%)
Size(mm): 0.5 Morphology: LATHS
Groundmass - GLASS ( 95%)
ALTERED TO RADIATE CLAYS*
Leg : 52 Top/Bottom Interval(mm): 620/ 640 Describer: Byerly, G.
Hole: 418A Top of Core Depth(m) : 357.00 Rock Type: IGNEOUS
Core: 20 Sample Midpoint(m) : 366.63 Sect/Pc #: 7/PCE 2A
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 7%)
Size(mm): TO 3 Morphology: EUHEDRAL
BOTH OSCILLATORY AND SECTOR ZONING*
Groundmass - OLIVINE ( 4%)
Size(mm): TO 0.5 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 40%)
Size(mm): TO 0.5 Morphology: ACICULAR
CLINOPYROXENE ( 42%)
Size(mm): 0.1 Morphology: GRANULAR-RADIATING SHEAVES
OPAQUE MINERALS ( 2%)
Size(mm): 0.02 Morphology: GRANULAR
GLASS ( 3%)
DEVITRIFIED,UNEVENLY DISTRIBUTED*
Alteration - CARBONATE
Location: VESICLES
SMECTITE
Location: VESICLES Replacing: OL
Vesicles -
Size(mm): TO 0.8
Percent: 2
Filling: SMEC,CARB
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 330/ 350 Describer: Byerly, G.
Hole: 418A Top of Core Depth(m) : 367.00 Rock Type: IGNEOUS
Core: 22 Sample Midpoint(m) : 368.84 Sect/Pc #: 2/PCE 1E
ROCK = PLAG-OL MODERATELY PHYRIC BASALT
SHIPBOARD DESCRIPTION (UNEDITED);
Texture: MODERATELY PORPHYRITIC,QUENCH;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): <0.5 Morphology: EUHEDRAL
MANY IN CLOTS WITH PLAG,ALTERED;
PLAGIOCLASE ( 7%)
Size(mm): <3 Morphology: EUHEDRAL
MANY IN CLOTS WITH OL,ZONED;
CLINOPYROXENE ( TR%)
Size(mm): 0.5
Groundmass - OLIVINE ( 1%)
Morphology: EUHEDRAL
SERIATE;
PLAGIOCLASE
Morphology: NEEDLES
SERIATE;
CLINOPYROXENE
Morphology: FEATHERY
VERY FINE QUENCH;
MAGNETITE ( 5%)
VERY FINE*
Alteration - CARBONATE ( <1%)
Location: VEINS,
Location: VESICLES
CLAY MINERALS ( 5%)
Location: VEINS, Replacing: OL
Location: VESICLES
MAY ALSO BE REPLACING GLASS?*
Vesicles -
Percent: 1
Filling: CARB,SMEC
Leg : 52 Top/Bottom Interval(mm): 150/ 190 Describer: Swanson, D.
Hole: 418A Top of Core Depth(m) : 375.50 Rock Type: IGNEOUS
Core: 23 Sample Midpoint(m) : 375.67 Sect/Pc #: 1/PCE 1
ROCK = PLAG-OL MODERATELY PHYRIC BASALT
SHIPBOARD DESCRIPTION (UNEDITED);
Texture: MODERATELY PORPHYRITIC,GLASSY;
Where sampled: GLASSY MARGIN*
Phenocrysts- OLIVINE ( TR%)
Size(mm): TO 1 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 5%)
Size(mm): TO 2 Morphology: SUBHEDRAL
SOME CLOTS;
CLINOPYROXENE ( 0%)
Groundmass - OLIVINE ( TR%)
Size(mm): <0.05 Morphology: EUHEDRAL
SOME FRESH;
PLAGIOCLASE ( 5%)
Size(mm): <0.1 Morphology: SKELETAL
CLINOPYROXENE ( 0%)
GLASS ( 90%)
INCLUDES DEVITRIFICATION PRODUCTS*
Alteration - CARBONATE ( 10%)
Location: VEIN,VESICLES Replacing: OL
FOUND IN ONE LARGE VEIN;
CLAY MINERALS ( 60%)
Replacing: GLASS
Vesicles -
Size(mm): <0.5
Percent: TR
Filling: CALCITE
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 530/ 550 Describer: Swanson, D.
Hole: 418A Top of Core Depth(m) : 376.00 Rock Type: IGNEOUS
Core: 24 Sample Midpoint(m) : 376.54 Sect/Pc #: 1/PCE 1C
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH-INTERGRANULAR;
Where sampled: FLOW MARGIN*
Phenocrysts- PLAGIOCLASE ( 8%)
Size(mm): TO 3.5 Morphology: EUHEDRAL
PATCHY ZONING;
Groundmass - OLIVINE ( 3%)
Size(mm): 0.2 Morphology: SUBHEDRAL
PLAGIOCLASE ( 45%)
Size(mm): TO 0.5 Morphology: LATHS,EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( 34%)
Size(mm): TO 0.1 Morphology: GRANULAR-RADIATING SHEAVES
OPAQUE MINERALS ( 3%)
Size(mm): 0.02 Morphology: GRANULAR
GLASS ( 5%)
ALTERED TO SMECTITE*
Alteration - CALCITE
Location: VESICLES
SMECTITE
Location: VESICLES Replacing: OL,GLASS
Vesicles -
Size(mm): 0.5
Percent: 2
Filling: SMEC,CALCITE
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 760/ 790 Describer: Byerly, G.
Hole: 418A Top of Core Depth(m) : 376.00 Rock Type: IGNEOUS
Core: 24 Sample Midpoint(m) : 376.78 Sect/Pc #: 1/PCE 2B
ROCK = PLAG PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH,VARIOLITIC;
Where sampled: NEXT TO GLASSY MARGIN OF FLOW*
Phenocrysts- PLAGIOCLASE ( 10%)
Size(mm): TO 8 Morphology: EUHEDRAL
SMALLER XTLS IN CLOTS,SOME ALTERATION IN CRACKS*
Groundmass - OLIVINE ( 4%)
Size(mm): 0.5 Morphology: EUHEDRAL
PLAGIOCLASE ( 15%)
Size(mm): TO 0.5 Morphology: ACICULAR
CLINOPYROXENE ( 69%)
Morphology: RADIATING SHEAVES
POORLY CRYSTALLIZED;
OPAQUE MINERALS ( 1%)
Size(mm): 0.01 Morphology: GRANULAR
Alteration - CARBONATE
Location: VESICLES
SMECTITE
Location: VESICLES Replacing: OL,PLAG
PLAG ONLY PARTLY ALTERED*
Vesicles -
Size(mm): 0.2
Percent: 1
Filling: SMEC,CARB
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 660/ 680 Describer: Swanson, D.
Hole: 418A Top of Core Depth(m) : 381.50 Rock Type: IGNEOUS
Core: 25 Sample Midpoint(m) : 382.17 Sect/Pc #: 1/PCE 2B
ROCK = APHYRIC BASALT;
Texture: APHYRIC,QUENCH;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE
Size(mm): 0.25
ONE OL MICROPHENO;
PLAGIOCLASE
Size(mm): 0.6
TWO PLAG MICROPHENOS*
Groundmass - OLIVINE ( <1%)
Size(mm): TO 0.2 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 50%)
Size(mm): 0.2 Morphology: SKELETAL
CLINOPYROXENE ( 45%)
Morphology: RADIATING SHEAVES,QUENCH
OPAQUE MINERALS ( 4%)
Size(mm): 0.02 Morphology: GRANULAR
Alteration - CALCITE
Location: VESICLES
SMECTITE
Location: VESICLES Replacing: OL
ALSO REPLACING MINOR INTESTITIAL MATERIAL*
Vesicles -
Size(mm): TO 0.2
Percent: 1
Filling: SMEC,CALCITE
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 870/ 890 Describer: Byerly, G.
Hole: 418A Top of Core Depth(m) : 381.50 Rock Type: IGNEOUS
Core: 25 Sample Midpoint(m) : 383.88 Sect/Pc #: 2/PCE 3
ROCK = APHYRIC BASALT
SHIPBOARD DESCRIPTION (UNEDITED);
Texture: APHYRIC,FINE-GRAINED,NEARLY HOLOCRYSTALLINE;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): <1 Morphology: LATHS
Groundmass - OLIVINE ( 3%)
Size(mm): <0.5
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 45%)
MAGNETITE ( 5%)
Size(mm): <0.1
GLASS ( 5%)
LOOKS NEARLY HOLOCRYSTALLINE,PERCENTAGE UNCERTAIN*
Alteration - CARBONATE ( 1%)
Location: VESICLES
CLAY MINERALS ( 10%)
Location: VESICLES Replacing: OL,GLASS
Vesicles -
Size(mm): <1
Percent: 3
Filling: SMEC,CARB
FILLING IS MOSTLY SMEC WITH SOME CARB*
Leg : 52 Top/Bottom Interval(mm): 140/ 170 Describer: Swanson, D.
Hole: 418A Top of Core Depth(m) : 384.50 Rock Type: IGNEOUS
Core: 26 Sample Midpoint(m) : 386.16 Sect/Pc #: 2/PCE 1
ROCK = PLAG MODERATELY PHYRIC BASALT
SHIPBOARD DESCRIPTION (UNEDITED);
Texture: MODERATELY PORPHYRITIC,INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( TR%)
Size(mm): TO 3 Morphology: EUHEDRAL
ALTERED TO SMECTITE;
PLAGIOCLASE ( 4%)
Size(mm): TO 2
SOME CLOTS;
CLINOPYROXENE ( TR%)
Size(mm): TO 0.5 Morphology: ANHEDRAL,ROUNDED
ONE IS OPTICALLY CONTINUOUS WITH MICROLITES*
Groundmass - OLIVINE ( 4%)
Size(mm): TO 0.2 Morphology: EUHEDRAL
SERIATE TO PHENOS,ALTERED;
PLAGIOCLASE ( 45%)
Size(mm): 0.3 Morphology: SUBHEDRAL
0.3 MM LONG;
CLINOPYROXENE ( 40%)
Size(mm): 0.1-0.2 Morphology: RADIATING SHEAVES
MAGNETITE ( 2%)
REST IS IN TACHYLYTE;
GLASS ( 5%)
TACHYLYTE*
Alteration - CALCITE ( TR%)
Location: VESICLES
SMECTITE ( 5%)
Replacing: OL,OL PHENOS
Vesicles -
Size(mm): <0.5
Percent: <1
Filling: CALCITE
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 1110/1140 Describer: Swanson, D.
Hole: 418A Top of Core Depth(m) : 384.50 Rock Type: IGNEOUS
Core: 26 Sample Midpoint(m) : 390.13 Sect/Pc #: 4/PCE 7
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): TO 1 Morphology: EUHEDRAL
REPLACED BY SMECTITE;
PLAGIOCLASE ( 10%)
Size(mm): TO 2 Morphology: EUHEDRAL
GLOMEROCRYSTS,ALTERED GLASS INCLUSIONS*
Groundmass - OLIVINE ( 2%)
Size(mm): TO 0.2 Morphology: SUBHEDRAL
PLAGIOCLASE ( 12%)
Size(mm): TO 0.3 Morphology: SKELETAL
CLINOPYROXENE ( 69%)
VERY POORLY CRYSTALLIZED;
OPAQUE MINERALS ( 4%)
Size(mm): 0.02 Morphology: GRANULAR
Alteration - CARBONATE
Location: VEINS, Replacing: OL
Location: VESICLES
SMECTITE
Location: VESICLES Replacing: OL
Vesicles -
Size(mm): TO 0.4
Percent: 2
Filling: SMEC,CALCITE
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 1180/1200 Describer: Byerly, G.
Hole: 418A Top of Core Depth(m) : 393.50 Rock Type: IGNEOUS
Core: 27 Sample Midpoint(m) : 394.69 Sect/Pc #: 1/PCE 11A
ROCK = PLAG-OL PHYRIC BASALT
SHIPBOARD DESCRIPTION (UNEDITED);
Texture: PORPHYRITIC,GLASSY,QUENCH;
Where sampled: GLASSY MARGIN*
Phenocrysts- OLIVINE ( 2%)
Size(mm): <2 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): <3 Morphology: LATHS
UP TO 10% INCLUSIONS,SOME ALTERATION;
SPINEL ( TR%)
Morphology: ROUNDED
ONE IN PLAG*
Groundmass - OLIVINE ( 1-4%)
ALTERED,SERIATE;
PLAGIOCLASE (10-20%)
SERIATE;
CLINOPYROXENE ( 0-40%)
Size(mm): <.01 Morphology: PLUMOSE,RADIATING BUNDLES
MAGNETITE ( 0-5%)
Size(mm): <.01 Morphology: EUHEDRAL
FINE;
GLASS ( 5-80%)
ALTERED*
Alteration - CARBONATE ( <1%)
Location: VEINS,
Location: VESICLES
CLAY MINERALS ( 20%)
Location: VEINS Replacing: GLASS,OL,PLAG
SEVERAL VARIETIES PRESENT*
Vesicles -
Percent: <1
Filling: CARB
SCARCE*
Leg : 52 Top/Bottom Interval(mm): 670/ 700 Describer: Byerly, G.
Hole: 418A Top of Core Depth(m) : 393.50 Rock Type: IGNEOUS
Core: 27 Sample Midpoint(m) : 395.69 Sect/Pc #: 2/PCE 5A
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 2%)
Size(mm): TO 0.8 Morphology: EUHEDRAL
ALTERED TO SMECTITE;
PLAGIOCLASE ( 8%)
Size(mm): TO 2.5 Morphology: EUHEDRAL
MANY GLOMEROCRYSTS,COMMONLY CLOTTED WITH OL*
Groundmass - PLAGIOCLASE ( 10%)
Size(mm): TO 0.2 Morphology: ACICULAR
CLINOPYROXENE ( 75%)
Morphology: RADIATING SHEAVES
OPAQUE MINERALS ( 4%)
Size(mm): 0.01 Morphology: GRANULAR
Alteration - SMECTITE
Location: VESICLES Replacing: OL,PLAG
SMEC ONLY REPLACES MINOR PLAG*
Vesicles -
Size(mm): 0.2
Percent: 1
Filling: SMEC
Shape: ROUND-OVOID
SMEC IS GREEN*
Leg : 52 Top/Bottom Interval(mm): 450/ 470 Describer: Pertsev, N.
Hole: 418A Top of Core Depth(m) : 402.50 Rock Type: IGNEOUS
Core: 28 Sample Midpoint(m) : 404.46 Sect/Pc #: 2/PCE 4D
ROCK = ALTERED VOLCANIGENIC SEDIMENT;
PIECE NUMBER AND INTERVAL DO NOT AGREE;
Where sampled: BETWEEN GLASSY MARGINS*
Groundmass - PALAGONITE ( 15%)
Size(mm): 0.4-0.7 Morphology: ROUND
Alteration - CARBONATE ( 25%)
CLAY MINERALS ( 60%)
Leg : 52 Top/Bottom Interval(mm): 310/ 330 Describer: Pertsev, N.
Hole: 418A Top of Core Depth(m) : 402.50 Rock Type: UNIDENTIFIED
Core: 28 Sample Midpoint(m) : 407.32 Sect/Pc #: 4/PCE 3A
ROCK = GLASSY BASALTIC BRECCIA
SHIPBOARD DESCRIPTION (UNEDITED);
Texture: PORPHYRITIC,GLASSY;
Where sampled: GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE ( 20%)
Size(mm): 2
APPROX COMP AN80,REFRACTIVE INDEX ALPHA=1.568 AND
GAMMA=1.576
Groundmass - GLASS ( 80%)
Alteration - CARBONATE ( 10%)
FOUND IN CEMENT;
CLAY MINERALS ( 80%)
Replacing: GLASS,PLAG
ZEOLITE ( 10%)
REFRACTIVE INDEX GAMMA=1.479,BIREFRINGENCE=0.002*
Leg : 52 Top/Bottom Interval(mm): 1200/1220 Describer: Swanson, D.
Hole: 418A Top of Core Depth(m) : 402.50 Rock Type: IGNEOUS
Core: 28 Sample Midpoint(m) : 408.21 Sect/Pc #: 4/PCE 9A
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): TO 1 Morphology: EUHEDRAL
COMPLETELY ALTERED;
PLAGIOCLASE ( 8%)
Size(mm): TO 3 Morphology: SUBHEDRAL
Groundmass - OLIVINE ( 2%)
Size(mm): 0.3 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 45%)
Size(mm): 0.2 Morphology: SKELETAL
CLINOPYROXENE
Morphology: RADIATING SHEAVES,ANHEDRAL,
Morphology: QUENCH
OPAQUE MINERALS ( 3%)
Size(mm): 0.01 Morphology: GRANULAR
Alteration - CARBONATE
Location: VESICLES Replacing: OL
SMECTITE
Location: VESICLES Replacing: OL
Vesicles -
Size(mm): TO 0.4
Percent: 1
Filling: SMEC,CALCITE
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 350/ 370 Describer: Emmermann, R.
Hole: 418A Top of Core Depth(m) : 411.50 Rock Type: IGNEOUS
Core: 29 Sample Midpoint(m) : 411.86 Sect/Pc #: 1/PCE 5A
ROCK = PLAG-OL MODERATELY PHYRIC BASALT
Texture: MODERATELY PORPHYRITIC,QUENCH;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): TO 0.5 Morphology: EUHEDRAL
COMPLETELY ALTERED TO CARBONATE;
PLAGIOCLASE ( 8%)
Size(mm): TO 3 Morphology: EUHEDRAL
HAS GROUNDMASS INCLUSIONS,SOME PLAG ALTERED TO
CALCITE*
Groundmass - OLIVINE ( 1%)
Size(mm): 0.1 Morphology: EUHEDRAL
PLAGIOCLASE ( 10%)
Size(mm): TO 0.4 Morphology: ACICULAR,LATHS,SWALLOW-TAILED
CLINOPYROXENE ( 75%)
Morphology: RADIATING SHEAVES
POORLY CRYSTALLIZED;
OPAQUE MINERALS ( 5%)
Size(mm): 0.01 Morphology: GRANULAR
Alteration - CARBONATE
Location: VESICLES Replacing: OL
Vesicles -
Size(mm): TO 0.7
Percent: <1
Filling: CARB
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 360/ 0 Describer: Ricou, L.
Hole: 418A Top of Core Depth(m) : 411.50 Rock Type: IGNEOUS
Core: 29 Sample Midpoint(m) : 411.86 Sect/Pc #: 1/PCE 5A
ROCK = PLAG-OL PHYRIC BASALT
SHIPBOARD DESCRIPTION (UNEDITED);
Texture: PORPHYRITIC,FLUIDAL;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): 0.2-1 Morphology: EUHEDRAL
ALTERED TO CALCITE;
PLAGIOCLASE ( 12%)
Size(mm): 0.5-5 Morphology: TABLETS
INCLUSIONS ALTERED TO CLAY*
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): 0.1 Morphology: NEEDLES
CLINOPYROXENE ( 35%)
Morphology: LOCALLY PLUMOSE
ALMOST COMPLETELY ALTERED TO CLAY;
OPAQUE MINERALS ( 15%)
Size(mm): 0.01 Morphology: CUBIC
GLASS ( 5%)
IDENTITY UNCERTAIN--NOW REPLACED BY IRREGULARLY
SHAPED CALCITE*
Alteration - CALCITE ( 8%)
Replacing: OL,GLASS
IDENTITY OF GLASS AS ORIGINAL MATERIAL UNCERTAIN*
Leg : 52 Top/Bottom Interval(mm): 1270/1290 Describer: Byerly, G.
Hole: 418A Top of Core Depth(m) : 414.50 Rock Type: IGNEOUS
Core: 30 Sample Midpoint(m) : 415.78 Sect/Pc #: 1/PCE 5D
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): <2.5 Morphology: EUHEDRAL
ALTERED TO SMECTITE;
PLAGIOCLASE ( 15%)
Size(mm): <5 Morphology: EUHEDRAL
SOME CLOTS*
Groundmass - OLIVINE ( 4%)
Size(mm): TO 0.4 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 30%)
Size(mm): TO 0.5 Morphology: LATHS
CLINOPYROXENE ( 44%)
Morphology: GRANULAR-RADIATING SHEAVES
OPAQUE MINERALS ( 5%)
Size(mm): 0.01 Morphology: EUHEDRAL
Alteration - CARBONATE
Location: VESICLES, Replacing: OL
Location: VEINS
SMECTITE
Location: VESICLES, Replacing: OL
Location: VEINS
Vesicles -
Size(mm): TO 0.5
Percent: 1
Filling: SMEC,CARB
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 930/ 960 Describer: Pertsev, N.
Hole: 418A Top of Core Depth(m) : 422.00 Rock Type: IGNEOUS
Core: 31 Sample Midpoint(m) : 425.95 Sect/Pc #: 3/PCE 8
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH;
Where sampled: GLASSY MARGIN*
Phenocrysts- OLIVINE ( 2%)
Size(mm): TO 0.6 Morphology: EUHEDRAL
PLAGIOCLASE ( 16%)
Size(mm): TO 3 Morphology: EUHEDRAL
Groundmass - GLASS ( 79%)
SLIGHTLY DEVITRIFIED*
Alteration - SMECTITE
Replacing: OL,PLAG
ONLY SOME PLAG ALTERED*
Vesicles -
Size(mm): TO 1
Percent: 3
Shape: OVOID-
Shape: IRREGULAR
Leg : 52 Top/Bottom Interval(mm): 180/ 200 Describer: Ricou, L.
Hole: 418A Top of Core Depth(m) : 440.00 Rock Type: IGNEOUS
Core: 33 Sample Midpoint(m) : 440.19 Sect/Pc #: 1/PCE 2
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): TO 1.5 Morphology: EUHEDRAL
REPLACED BY CALCITE;
PLAGIOCLASE ( 13%)
Size(mm): TO 3 Morphology: EUHEDRAL,TABLETS
Groundmass - OLIVINE ( 1%)
Size(mm): 0.1 Morphology: EUHEDRAL
PLAGIOCLASE ( 15%)
Size(mm): TO 0.3 Morphology: ACICULAR,LATHS
CLINOPYROXENE ( 62%)
Morphology: RADIATING SHEAVES
POORLY CRYSTALLIZED;
OPAQUE MINERALS ( 5%)
Size(mm): 0.01 Morphology: GRANULAR
Alteration - CARBONATE
Location: VESICLES Replacing: OL
SMECTITE
Replacing: PLAG
PLAG ONLY PARTLY ALTERED*
Vesicles -
Size(mm): TO 0.3
Percent: 2
Filling: CARB
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 760/ 780 Describer: Swanson, D.
Hole: 418A Top of Core Depth(m) : 449.00 Rock Type: IGNEOUS
Core: 34 Sample Midpoint(m) : 449.77 Sect/Pc #: 1/PCE 2E
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,INTERGRANULAR;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
Size(mm): TO 0.8 Morphology: EUHEDRAL
REPLACED;
PLAGIOCLASE ( 8%)
Size(mm): TO 3.5 Morphology: SUBHEDRAL
COMMONLY CLOTTED*
Groundmass - OLIVINE ( 2%)
Size(mm): TO 0.2 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 40%)
Size(mm): TO 0.2 Morphology: SUBHEDRAL
CLINOPYROXENE ( 40%)
Size(mm): TO 0.2 Morphology: ANHEDRAL
HAS QUENCH ASPECTS;
OPAQUE MINERALS ( 2%)
Size(mm): 0.03 Morphology: GRANULAR
GLASS ( 8%)
Morphology: INTERSTITIAL
Alteration - CARBONATE
Replacing: OL
SMECTITE
Location: VESICLES Replacing: OL
Vesicles -
Size(mm): TO 0.2
Percent: <1
Filling: SMEC
Shape: ROUND
SMEC IS BROWN,SOME SHRINKAGE*
Leg : 52 Top/Bottom Interval(mm): 30/ 70 Describer: Byerly, G.
Hole: 418A Top of Core Depth(m) : 449.00 Rock Type: IGNEOUS
Core: 34 Sample Midpoint(m) : 452.05 Sect/Pc #: 3/PCE 1A
ROCK = PLAG-OL-CPX PHYRIC BASALT;
Texture: PORPHYRITIC,INTERSERTAL;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): TO 3.5 Morphology: EUHEDRAL
COMPLETELY ALTERED TO SMECTITE;
PLAGIOCLASE ( 10%)
Size(mm): TO 7 Morphology: EUHEDRAL
CLINOPYROXENE ( <1%)
Size(mm): TO 1.5 Morphology: ROUNDED,SUBHEDRAL
POSSIBLY A XENOCRYST?*
Groundmass - OLIVINE ( 5%)
Size(mm): TO 0.5 Morphology: EUHEDRAL
ALTERED TO SMECTITE;
PLAGIOCLASE ( 40%)
Size(mm): TO 0.6 Morphology: LATHS
CLINOPYROXENE ( 30%)
Size(mm): TO 0.25 Morphology: SUBHEDRAL
"BOW-TIES" WITH PLAG;
OPAQUE MINERALS ( 5%)
Size(mm): 0.01 Morphology: EUHEDRAL
GLASS ( 8%)
DEVITRIFIED*
Alteration - SMECTITE
Location: VESICLES, Replacing: OL
Location: VEINS
Vesicles -
Size(mm): TO 0.4
Percent: 1
Filling: SMEC
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 390/ 410 Describer: Pertsev, N.
Hole: 418A Top of Core Depth(m) : 458.00 Rock Type: IGNEOUS
Core: 35 Sample Midpoint(m) : 462.90 Sect/Pc #: 4/PCE 3A
ROCK = PLAG VITROPHYRIC BASALT
SHIPBOARD DESCRIPTION (UNEDITED),10% OF THE
GROUNDMASS IS A VOID,FRAGMENT IN VOLCANIC BRECCIA;
Texture: PORPHYRITIC,GLASSY;
Where sampled: GLASSY MARGIN,PILLOW BASALT*
Phenocrysts- PLAGIOCLASE ( 10%)
Size(mm): TO 4
Groundmass - GLASS ( 80%)
Alteration - CARBONATE ( 10%)
Location: FILLINGS,
Location: VEINS
CLAY MINERALS ( 80%)
Replacing: GLASS,PLAG
KFELDSPAR ( 5%)
Replacing: PLAG
Leg : 52 Top/Bottom Interval(mm): 180/ 210 Describer: Pertsev, N.
Hole: 418A Top of Core Depth(m) : 467.00 Rock Type: IGNEOUS
Core: 36 Sample Midpoint(m) : 471.70 Sect/Pc #: 4/PCE 1B
ROCK = PLAG-OL PHYRIC BASALT
SHIPBOARD DESCRIPTION (UNEDITED);
Texture: PORPHYRITIC,INTERSERTAL;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 3
ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): 3
Groundmass - OLIVINE ( 5%)
PLAGIOCLASE ( 22%)
CLINOPYROXENE ( 28%)
MAGNETITE ( 10%)
GLASS ( 10%)
Alteration - CARBONATE
Location: VESICLES
CLAY MINERALS
Location: VESICLES Replacing: OL,GLASS,GROUNDMASS
Vesicles -
Size(mm): 2
Percent: 5
Filling: CLAY.MIN,CARB
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 110/ 130 Describer: Pertsev, N.
Hole: 418A Top of Core Depth(m) : 476.00 Rock Type: IGNEOUS
Core: 37 Sample Midpoint(m) : 476.12 Sect/Pc #: 1/PCE 2
ROCK = PLAG PHYRIC BASALT
SHIPBOARD DESCRIPTION (UNEDITED);
THE WHOLE ROCK IS BADLY ALTERED,EVEN PLAG PHENOS
ARE REPLACED BY SCOLECITE OR ORTHOCLASE,THE ROCK
IS OXIDIZED;
Texture: PORPHYRITIC;
Where sampled: GLASSY MARGIN,NEXT TO GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE ( 15%)
Size(mm): TO 3
REPLACED BY SCOLECITE OR ORTHOCLASE*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): 0.7
CLINOPYROXENE ( 15%)
GLASS ( 50%)
Alteration - CARBONATE ( 10%)
Location: VEINS
CLAY MINERALS ( 75%)
Replacing: GLASS,PLAG,GROUNDMASS
ZEOLITE ( 15%)
Replacing: PLAG
IDENTITY UNCERTAIN FOR ZEOLITE--IT IS EITHER
SCOLECITE OR ORTHOCLASE*
Leg : 52 Top/Bottom Interval(mm): 30/ 0 Describer: Ricou, L.
Hole: 418A Top of Core Depth(m) : 479.50 Rock Type: SEDIMENTARY
Core: 38 Sample Midpoint(m) : 479.53 Sect/Pc #: 1/PCE 1B
ROCK = SANDSTONE
PIECES OF GLASS <1 MM-MOSTLY ALTERED TO GREEN AND
DARK BROWN CLAY.MINS,SOME FRESH - INCLUDING
SNOWFLAKE-SHAPED OP.MINS,DETRITAL PIECES OF MAGN
AND ILMENITE
Texture: BEDDED;
Where sampled: BETWEEN PILLOWS*
Alteration - ANAL
Location: CEMENT
CALCITE
EUHEDRAL XTLS*
Leg : 52 Top/Bottom Interval(mm): 340/ 360 Describer: Emmermann, R.
Hole: 418A Top of Core Depth(m) : 479.50 Rock Type: IGNEOUS
Core: 38 Sample Midpoint(m) : 484.35 Sect/Pc #: 4/PCE 1C
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): TO 0.7 Morphology: EUHEDRAL
COMPLETELY ALTERED;
PLAGIOCLASE ( 7%)
Size(mm): TO 2.5 Morphology: EUHEDRAL
CLOTS AND SINGLE CRYSTALS*
Groundmass - OLIVINE ( 1%)
Size(mm): 0.2 Morphology: SUBHEDRAL
PLAGIOCLASE ( 20%)
Size(mm): TO 0.3 Morphology: ACICULAR,LATHS,SWALLOW-TAILED
CLINOPYROXENE ( 66%)
Morphology: RADIATING SHEAVES
OPAQUE MINERALS ( 5%)
Size(mm): 0.01 Morphology: GRANULAR
Alteration - CARBONATE
Location: VESICLES, Replacing: OL
Location: VEINLET
SMECTITE
Location: VESICLES Replacing: OL
Vesicles -
Size(mm): TO 0.5
Percent: <1
Filling: SMEC,CARB
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 1190/1210 Describer: Emmermann, R.
Hole: 418A Top of Core Depth(m) : 488.50 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 489.70 Sect/Pc #: 1/PCE 10
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH,FINE-GRAINED;
Where sampled: PILLOW INTERIOR;
Phenocrysts- OLIVINE ( <1%)
Size(mm): TO 0.8 Morphology: EUHEDRAL
REPLACED BY CARBONATE;
PLAGIOCLASE ( 7%)
Size(mm): TO 3 Morphology: SUBHEDRAL
Groundmass - PLAGIOCLASE ( 15%)
Size(mm): TO 0.4 Morphology: ACICULAR,SWALLOW-TAILED
CLINOPYROXENE ( 72%)
Morphology: RADIATING AGGREGATES
OPAQUE MINERALS ( 5%)
Size(mm): 0.01 Morphology: GRANULAR
Alteration - CARBONATE
Location: VESICLES Replacing: OL
Vesicles -
Size(mm): TO 0.5
Percent: 1
Filling: CARB
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 50/ 0 Describer: Ricou, L.
Hole: 418A Top of Core Depth(m) : 497.50 Rock Type: SEDIMENTARY
Core: 40 Sample Midpoint(m) : 497.55 Sect/Pc #: 1/PCE 1C
ROCK = RADIOLARIAN CHERT
NUMEROUS ROUND AND CONICAL RADS REPLACED BY
CHALCEDONY,CEMENT IS MICROCRYSTALLINE SILICA,
POSSIBLY CHALCEDONY + BROWN CLAY + DETRITAL MAGN +
PYRITE-AT LEAST PARTLY AUTHIGENIC;
Texture: WELL BEDDED*
Leg : 52 Top/Bottom Interval(mm): 340/ 370 Describer: Pertsev, N.
Hole: 418A Top of Core Depth(m) : 497.50 Rock Type: IGNEOUS
Core: 40 Sample Midpoint(m) : 497.86 Sect/Pc #: 1/PCE 2B
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH;
Where sampled: PILLOW INTERIOR;
Phenocrysts- OLIVINE ( 1%)
Size(mm): TO 2 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 12%)
Size(mm): TO 2.5 Morphology: EUHEDRAL
PARTLY ALTERED--MORE SODIC RIMS ARE FRESH*
Groundmass - OLIVINE ( 2%)
Size(mm): 0.2 Morphology: SUBHEDRAL
ALTERED;
PLAGIOCLASE ( 25%)
Size(mm): 0.6 Morphology: ACICULAR
FRESH,MICROLITES;
CLINOPYROXENE ( 52%)
Morphology: RADIATING SHEAVES,ANHEDRAL
POORLY CRYSTALLIZED;
OPAQUE MINERALS ( 7%)
Size(mm): 0.01 Morphology: GRANULAR
Alteration - CARBONATE
Location: VESICLES Replacing: PLAG
PLAG ONLY PARTLY ALTERED TO CARB;
SMECTITE
Replacing: OL,PLAG
PLAG ONLY PARTLY ALTERED TO SMEC*
Vesicles -
Size(mm): 0.5
Percent: 1
Filling: CARB
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 690/ 700 Describer: Pertsev, N.
Hole: 418A Top of Core Depth(m) : 497.50 Rock Type: IGNEOUS
Core: 40 Sample Midpoint(m) : 499.70 Sect/Pc #: 2/PCE 2D
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): TO 0.6 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): TO 3 Morphology: EUHEDRAL
PARTLY ALTERED--MORE SODIC RIMS ARE FRESH*
Groundmass - OLIVINE ( 2%)
Size(mm): TO 0.3 Morphology: SUBHEDRAL
ALTERED;
PLAGIOCLASE ( 23%)
Size(mm): TO 0.5 Morphology: ACICULAR
FRESH,MICROLITES;
CLINOPYROXENE ( 52%)
Morphology: RADIATING SHEAVES,ANHEDRAL
POORLY CRYSTALLIZED;
OPAQUE MINERALS ( 6%)
Size(mm): TO 0.05 Morphology: GRANULAR
Alteration - CARBONATE
Location: VESICLES, Replacing: PLAG
Location: VEINS
PLAG ONLY PARTLY ALTERED TO CARB;
SMECTITE
Location: VESICLES, Replacing: OL,PLAG
Location: VEINS
PLAG ONLY PARTLY ALTERED TO SMEC*
Vesicles -
Size(mm): TO 0.5
Percent: 1
Filling: SMEC,CARB
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 900/ 920 Describer: Pertsev, N.
Hole: 418A Top of Core Depth(m) : 497.50 Rock Type: IGNEOUS
Core: 40 Sample Midpoint(m) : 499.91 Sect/Pc #: 2/PCE 3A
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): TO 2 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): TO 4 Morphology: EUHEDRAL
PARTLY ALTERED--MORE SODIC RIMS ARE FRESH*
Groundmass - OLIVINE ( 3%)
Size(mm): TO 0.4 Morphology: SUBHEDRAL
ALTERED;
PLAGIOCLASE ( 18%)
Size(mm): TO 0.4 Morphology: ACICULAR
FRESH,MICROLITES;
CLINOPYROXENE ( 61%)
Morphology: RADIATING SHEAVES,ANHEDRAL
POORLY CRYSTALLIZED*
Alteration - CARBONATE
Location: VESICLES, Replacing: PLAG,OL,MATRIX
Location: VEINS
PLAG ONLY PARTLY TO CARB AND ONLY SOME MATRIX
ALTERED;
SMECTITE
Replacing: OL,MATRIX
ONLY SOME MATRIX ALTERED;
ZEOLITE
Replacing: PLAG
IDENTITY UNCERTAIN FOR ZEOLITE,PLAG ONLY PARTLY
ALTERED*
Vesicles -
Size(mm): 0.3
Percent: 2
Filling: CALCITE
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 390/ 410 Describer: Pertsev, N.
Hole: 418A Top of Core Depth(m) : 498.50 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 498.90 Sect/Pc #: 1/PCE 4A
ROCK = PLAG-OL PHYRIC BASALT
SHIPBOARD DESCRIPTION (UNEDITED);
Texture: PORPHYRITIC,GLASSY-VARIOLITIC;
Where sampled: GLASSY MARGIN*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 1 Morphology: EUHEDRAL
ALMOST COMPLETELY FRESH;
PLAGIOCLASE ( 10%)
Size(mm): 2 Morphology: EUHEDRAL
SPINEL ( <1%)
Size(mm): 0.01 Morphology: EUHEDRAL
FOUND IN GLASS + PLAG + OLIVINE*
Groundmass - GLASS ( 73%)
FRESH OR VARIOLITIC*
Alteration - CLAY MINERALS ( 1%)
Location: VESICLES Replacing: GLASS,OL
THIN VEINS IN GLASS*
Vesicles -
Size(mm): 0.01
Percent: <1
Filling: SMEC
Leg : 52 Top/Bottom Interval(mm): 400/ 420 Describer: Swanson, D.
Hole: 418A Top of Core Depth(m) : 498.50 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 498.91 Sect/Pc #: 1/PCE 4A
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH*
Phenocrysts- OLIVINE ( <1%)
Size(mm): TO 0.6 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 8%)
Size(mm): TO 8 Morphology: EUHEDRAL
AVERAGE SIZE 1-1.5 MM,PARTLY ALTERED*
Groundmass - OLIVINE ( 3%)
Size(mm): TO 0.3 Morphology: SUBHEDRAL
PLAGIOCLASE ( 40%)
Size(mm): TO 0.5 Morphology: ACICULAR
FLOW ALIGNED;
CLINOPYROXENE ( 43%)
Morphology: RADIATING SHEAVES
QUENCH;
OPAQUE MINERALS ( 2%)
Size(mm): 0.01 Morphology: GRANULAR
Alteration - CARBONATE
Location: VESICLES Replacing: OL
SMECTITE
Location: VESICLES Replacing: OL
Vesicles -
Size(mm): TO 0.4
Percent: 4
Filling: SMEC,CALCITE
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 60/ 80 Describer: Pertsev, N.
Hole: 418A Top of Core Depth(m) : 498.50 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 504.57 Sect/Pc #: 5/PCE 1
ROCK = PLAG-OL PHYRIC BASALT
SHIPBOARD DESCRIPTION (UNEDITED);
Texture: PORPHYRITIC,QUENCH;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 3%)
Size(mm): 2 Morphology: EUHEDRAL
PLAGIOCLASE ( 7%)
Size(mm): 3 Morphology: LATHS
BADLY ALTERED*
Groundmass - PLAGIOCLASE ( 25%)
Size(mm): TO 1
PARTLY ALTERED;
MAGNETITE ( 10%)
Size(mm): 0.01
GLASS ( 30%)
OTHER ( 20%)
Alteration - CARBONATE ( 5%)
Location: VESICLES,
Location: VEINS
CLAY MINERALS ( 50%)
Location: VESICLES Replacing: GROUNDMASS,OL,PLAG
KFELDSPAR ( 3%)
Replacing: PLAG
Vesicles -
Percent: 5
Filling: SMEC,CALCITE
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 510/ 540 Describer: Pertsev, N.
Hole: 418A Top of Core Depth(m) : 507.50 Rock Type: IGNEOUS
Core: 42 Sample Midpoint(m) : 509.53 Sect/Pc #: 2/PCE 4
ROCK = PLAG PHYRIC BASALT
SHIPBOARD DESCRIPTION (UNEDITED);
Texture: PORPHYRITIC,INTERGRANULAR;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE ( 25%)
Size(mm): 4 Morphology: EUHEDRAL
SPINEL ( TR%)
Size(mm): 0.3 Morphology: EUHEDRAL
ONE GRAIN--DARK RED BROWN*
Groundmass - OLIVINE ( 8%)
Size(mm): 0.4
PLAGIOCLASE ( 17%)
Size(mm): 0.9
CLINOPYROXENE ( 25%)
Size(mm): 0.9
MAGNETITE ( 6%)
Size(mm): 0.05
ILMENITE ( 4%)
Size(mm): 0.05
GLASS ( 5%)
ALTERED*
Alteration - CARBONATE ( 3%)
Location: VESICLES Replacing: GROUNDMASS
CLAY MINERALS ( 15%)
Location: VESICLES Replacing: OL,GLASS
Vesicles -
Size(mm): 3
Percent: 10
Filling: SMEC,CARB
Shape: ROUND,
Shape: IRREGULAR
Leg : 52 Top/Bottom Interval(mm): 890/ 910 Describer: Pertsev, N.
Hole: 418A Top of Core Depth(m) : 507.50 Rock Type: IGNEOUS
Core: 42 Sample Midpoint(m) : 512.90 Sect/Pc #: 4/PCE 5
ROCK = PLAG-OL PHYRIC BASALT
Texture: PORPHYRITIC,QUENCH;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 3%)
Size(mm): TO 3 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): TO 5 Morphology: EUHEDRAL
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): TO 0.5 Morphology: ACICULAR
CLINOPYROXENE ( 44%)
Morphology: RADIATING SHEAVES
OPAQUE MINERALS ( 5%)
Size(mm): 0.02 Morphology: GRANULAR
SPINEL ( TR%)
Size(mm): 0.2 Morphology: EUHEDRAL
ONE GRAIN--DARK RED BROWN*
Alteration - CARBONATE
Location: VESICLES, Replacing: OL,GROUNDMASS
Location: VEINS
SMECTITE
Location: VESICLES Replacing: OL,GROUNDMASS
Vesicles -
Size(mm): TO 0.4
Percent: 3
Filling: SMEC,CARB
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 340/ 360 Describer: Pertsev, N.
Hole: 418A Top of Core Depth(m) : 525.50 Rock Type: IGNEOUS
Core: 44 Sample Midpoint(m) : 527.35 Sect/Pc #: 2/PCE 3B
ROCK = PLAG-OL PHYRIC BASALT
THE ROCK IS UNUSUALLY FRESH;
Texture: PORPHYRITIC,QUENCH;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 3%)
Size(mm): TO 1 Morphology: EUHEDRAL
PARTLY ALTERED;
PLAGIOCLASE ( 10%)
Size(mm): TO 2 Morphology: EUHEDRAL
Groundmass - OLIVINE ( 5%)
Size(mm): 0.2 Morphology: ANHEDRAL
PLAGIOCLASE ( 40%)
Size(mm): 0.5 Morphology: ACICULAR
MICROLITES;
CLINOPYROXENE ( 37%)
Size(mm): TO 0.3 Morphology: ANHEDRAL-RADIATING SHEAVES
OPAQUE MINERALS ( 5%)
Size(mm): 0.01 Morphology: GRANULAR
SPINEL ( TR%)
Size(mm): 0.2 Morphology: EUHEDRAL
ONE GRAIN--DARK RED BROWN*
Alteration - CALCITE
Location: VESICLES
SMECTITE
Location: VESICLES Replacing: OL,GROUNDMASS
ONLY MINOR GROUNDMASS ALTERED*
Vesicles -
Size(mm): TO 0.2
Percent: <1
Filling: SMEC,CALCITE
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 820/ 850 Describer: Pertsev, N.
Hole: 418A Top of Core Depth(m) : 534.50 Rock Type: IGNEOUS
Core: 45 Sample Midpoint(m) : 538.34 Sect/Pc #: 3/PCE 6B
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,QUENCH,INTERSERTAL*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.6 Morphology: EUHEDRAL
PLAGIOCLASE ( 5%)
Size(mm): TO 2 Morphology: EUHEDRAL
Groundmass - OLIVINE ( 2%)
Size(mm): TO 0.2 Morphology: SUBHEDRAL
PLAGIOCLASE ( 20%)
Size(mm): 0.2 Morphology: ACICULAR
MICROLITES;
CLINOPYROXENE ( 65%)
Morphology: RADIATING SHEAVES,ANHEDRAL
POORLY CRYSTALLIZED;
OPAQUE MINERALS ( 5%)
Size(mm): 0.01 Morphology: GRANULAR
Alteration - CARBONATE
Location: VESICLES Replacing: OL,GROUNDMASS
SMECTITE
Replacing: OL,GROUNDMASS
Vesicles -
Size(mm): TO 0.2
Percent: 1
Filling: CARB
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 90/ 120 Describer: Byerly, G.
Hole: 418A Top of Core Depth(m) : 534.50 Rock Type: IGNEOUS
Core: 45 Sample Midpoint(m) : 539.10 Sect/Pc #: 4/PCE 1A
ROCK = PLAG-OL PHYRIC BASALT
SHIPBOARD DESCRIPTION (UNEDITED);
Texture: PORPHYRITIC,QUENCH;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 3%)
Size(mm): <2 Morphology: EUHEDRAL
SOME FRESH,OFTEN IN CLOTS OF PLAG;
PLAGIOCLASE ( 8%)
Size(mm): <4 Morphology: LATHS
MANY INCLUSIONS
SPINEL ( TR%)
Size(mm): TO 0.4 Morphology: EUHEDRAL
IN GROUNDMASS + PLAG + OL*
Groundmass - OLIVINE ( 5%)
Morphology: EUHEDRAL,SKELETAL,HOLLOW
SERIATE,SOME SKELETAL,SOME VERY SMALL XTLS,FRESH,
SOME HOLLOW;
PLAGIOCLASE ( 40%)
Morphology: SKELETAL
SERIATE,OL-PLAG INTERGROWTHS,HOLLOW XTLS;
CLINOPYROXENE
Morphology: FEATHERY-DENDRITIC
PERCENTAGE UNCERTAIN;
MAGNETITE ( <1%)
Size(mm): <0.01
GLASS
PERCENTAGE UNCERTAIN,IN DENDRITIC MESH WITH CPX*
Alteration - CARBONATE ( 2%)
Replacing: GROUNDMASS
CLAY MINERALS ( 2%)
Location: OL Replacing: OL
SOME OL IS PLEOCHROIC*
Leg : 52 Top/Bottom Interval(mm): 90/ 120 Describer: Pertsev, N.
Hole: 418A Top of Core Depth(m) : 534.50 Rock Type: IGNEOUS
Core: 45 Sample Midpoint(m) : 539.10 Sect/Pc #: 4/PCE 1A
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): TO 1 Morphology: EUHEDRAL
PARTLY ALTERED;
PLAGIOCLASE ( 16%)
Size(mm): TO 4 Morphology: EUHEDRAL
SPINEL ( <1%)
Size(mm): 0.7 Morphology: SUBHEDRAL
DARK RED BROWN*
Groundmass - OLIVINE ( 3%)
Size(mm): 0.2 Morphology: SUBHEDRAL
PLAGIOCLASE ( 25%)
Size(mm): 0.4 Morphology: ACICULAR
CLINOPYROXENE ( 32%)
Morphology: SHEAVES
POORLY CRYSTALLIZED;
OPAQUE MINERALS ( 3%)
Size(mm): 0.02 Morphology: GRANULAR
GLASS ( 15%)
DEVITRIFIED*
Alteration - CARBONATE
Location: VESICLES Replacing: OL,GROUNDMASS
OL ONLY PARTLY TO CARB;
SMECTITE
Replacing: OL
OL ONLY PARTLY TO SMEC*
Vesicles -
Size(mm): 0.2
Percent: 1
Filling: CALCITE
Shape: IRREGULAR-
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 390/ 410 Describer: Robinson, P.
Hole: 418A Top of Core Depth(m) : 543.50 Rock Type: IGNEOUS
Core: 46 Sample Midpoint(m) : 543.90 Sect/Pc #: 1/PCE 2B
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,GLASSY*
Phenocrysts- OLIVINE ( 2%)
Size(mm): TO 1 Morphology: EUHEDRAL
PLAGIOCLASE ( 10%)
Size(mm): TO 4 Morphology: EUHEDRAL
Groundmass - GLASS ( 88%)
PARTLY DEVITRIFIED*
Alteration - SMECTITE
Replacing: OL
ONLY SOME OL ALTERED*
Vesicles -
Size(mm): TO 0.2
Percent: <1
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 270/ 300 Describer: Swanson, D.
Hole: 418A Top of Core Depth(m) : 552.50 Rock Type: IGNEOUS
Core: 47 Sample Midpoint(m) : 552.78 Sect/Pc #: 1/PCE 1D
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): TO 1 Morphology: EUHEDRAL
30-40% FRESH;
PLAGIOCLASE ( 10%)
Size(mm): TO 3 Morphology: SUBHEDRAL
MANY CLOTS--SOME WITH OL;
SPINEL ( TR%)
Size(mm): 0.2 Morphology: EUHEDRAL
ISOLATED XTL SURROUNDED BY GROUNDMASS,DARK RIM IN
CONTACT WITH QUENCH*
Groundmass - OLIVINE ( 3%)
Size(mm): TO 0.25 Morphology: EUHEDRAL
PLAGIOCLASE ( 25%)
Size(mm): TO 0.5 Morphology: ACICULAR
CLINOPYROXENE ( 53%)
Morphology: RADIATING SHEAVES
OPAQUE MINERALS ( 6%)
Size(mm): 0.01 Morphology: GRANULAR-LATHS
Alteration - CARBONATE
Location: VESICLES Replacing: OL,GROUNDMASS
OL AND GROUNDMASS ONLY PARTLY TO CARB;
SMECTITE
Location: VESICLES Replacing: OL,GROUNDMASS
OL AND GROUNDMASS ONLY PARTLY TO SMEC*
Vesicles -
Size(mm): TO 0.5
Percent: <1
Filling: SMEC,CALCITE
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 820/ 840 Describer: Pertsev, N.
Hole: 418A Top of Core Depth(m) : 561.50 Rock Type: IGNEOUS
Core: 48 Sample Midpoint(m) : 568.33 Sect/Pc #: 5/PCE 6
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,QUENCH;
Where sampled: PILLOW INTERIOR,FLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): TO 2 Morphology: EUHEDRAL
PARTLY ALTERED;
PLAGIOCLASE ( 18%)
Size(mm): TO 4 Morphology: EUHEDRAL
Groundmass - OLIVINE ( 3%)
Size(mm): TO 0.2 Morphology: SUBHEDRAL
PARTLY ALTERED,MICROLITES;
PLAGIOCLASE ( 25%)
Size(mm): 0.6 Morphology: ACICULAR
MICROLITES
CLINOPYROXENE ( 45%)
Morphology: RADIATING SHEAVES,ANHEDRAL
MICROLITES;
OPAQUE MINERALS ( 5%)
Size(mm): 0.01 Morphology: GRANULAR
SPINEL ( <1%)
Size(mm): 0.15 Morphology: EUHEDRAL
SEVERAL GRAINS,DARK BROWN*
Alteration - CARBONATE
Location: VESICLES Replacing: OL
OL ONLY PARTLY TO CARB;
SMECTITE
Location: VESICLES Replacing: OL
OL ONLY PARTLY TO SMEC*
Vesicles -
Size(mm): TO 0.4
Percent: 1
Filling: SMEC,CALCITE
Shape: ROUND
|
