Leg : 51 Top/Bottom Interval(mm): 570/ 0 Describer: Sinton, J.
Hole: 417D Top of Core Depth(m) : 334.50 Rock Type: IGNEOUS
Core: 21 Sample Midpoint(m) : 339.57 Sect/Pc #: 4/PCE 4
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED,ALTERATION HALO ALONG VEINS AND
MARGINS;
Texture: PORPHYRITIC*
Phenocrysts- OLIVINE ( 2-5%)
Size(mm): 2
COMPLETELY REPLACED BY CALCITE;
PLAGIOCLASE (15-20%)
Size(mm): TO 5 Morphology: EUHEDRAL
MANY REPLACED BY K-FELDSPAR*
Groundmass - OLIVINE ( 5%)
Size(mm): .1-.2
ALTERED;
PLAGIOCLASE ( 30%)
Size(mm): .3-.5 Morphology: MICROLITIC,LATHS
LOCALLY SKELETAL;
CLINOPYROXENE ( 25%)
Size(mm): .1-.2 Morphology: SHEAVES
DEVITRIFICATION PRODUCT;
MAGNETITE ( <5%)
Size(mm): .05-.1 Morphology: DENDRITIC
SULFIDES ( <1%)
KFELDSPAR ( TR%)
AS PLAG REPLACEMENT*
Alteration - CALCITE
Replacing: OL
SMECTITE
Replacing: OL
GREEN SMECTITE;
KFELDSPAR
Replacing: PLAG
ZEOLITE
Replacing: PLAG
IDENTITY UNCERTAIN FOR ZEOLITE;
CLAY MINERALS
Location: VEIN
Vesicles -
Size(mm): .3
Percent: 1
Shape: ROUND
SHRINKAGE*
Leg : 51 Top/Bottom Interval(mm): 650/ 0 Describer: Sinton, J.
Hole: 417D Top of Core Depth(m) : 344.00 Rock Type: IGNEOUS
Core: 22 Sample Midpoint(m) : 344.65 Sect/Pc #: 1/PCE 4
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED;
Texture: PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 2-5%)
Size(mm): .5
PLAGIOCLASE (10-15%)
Size(mm): 2-3 Morphology: EUHEDRAL
APPROX COMP AN65-85,LOCALLY GLOMEROPORPHYRITIC*
Groundmass - OLIVINE ( 1-2%)
IDENTITY UNCERTAIN FOR OL;
PLAGIOCLASE ( 40%)
Size(mm): .5
APPROX COMP AN>40,LOCALLY SKELETAL;
CLINOPYROXENE ( 30%)
Morphology: QUENCHED
MAGNETITE ( 1-5%)
Morphology: QUENCHED
Alteration - CALCITE
Location: VEINS Replacing: OL,PLAG
CELADONITE
Location: VEINS, Replacing: OL
Location: VESICLES
CLAY MINERALS
Replacing: PLAG
KFELDSPAR
Replacing: PLAG
Vesicles -
Percent: 1-2
Filling: CALCITE,CELAD
SHRINKAGE*
Leg : 51 Top/Bottom Interval(mm): 200/ 0 Describer: Sinton, J.
Hole: 417D Top of Core Depth(m) : 344.00 Rock Type: IGNEOUS
Core: 22 Sample Midpoint(m) : 348.70 Sect/Pc #: 4/PCE 1A
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: PORPHYRITIC,INTERSERTAL;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 5-6%)
Size(mm): TO 4
PLAGIOCLASE ( 10%)
Size(mm): TO 4
APPROX COMP AN72;
CLINOPYROXENE ( .1%)
Size(mm): .3
1 GRAIN-MICROPHENOCRYST*
Groundmass - OLIVINE ( 5%)
PLAGIOCLASE (35-40%)
Size(mm): .7 Morphology: ELONGATE LATHS
APPROX COMP AN60, LOCALLY SKELETAL,SOME SECTOR
ZONING PERHAPS;
CLINOPYROXENE ( 40%)
MAGNETITE ( 1-4%)
SULFIDES ( <1%)
Alteration - CLAY MINERALS
Replacing: OL
SMECTITE
Replacing: OL
Vesicles -
Size(mm): .2
Percent: 1-2
Filling: CLAY.MINS
Shape: ROUND
SHRINKAGE*
Leg : 51 Top/Bottom Interval(mm): 470/ 0 Describer: Sinton, J.
Hole: 417D Top of Core Depth(m) : 344.00 Rock Type: IGNEOUS
Core: 22 Sample Midpoint(m) : 348.97 Sect/Pc #: 4/PCE 1D
ROCK = PLAG PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: HYALOPORPHYRITIC;
Where sampled: GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE ( 10%)
Size(mm): 4
APPROX COMP AN55-70;
CLINOPYROXENE ( <1%)
Size(mm): .5
RESORBED MEGACRYSTS,2V >50*
Groundmass - OLIVINE ( 1-2%)
Size(mm): .1-.3
PARTLY FRESH;
PLAGIOCLASE ( 5-15%)
Size(mm): .2 Morphology: SKELETAL
SKELETAL,SOME FIBROUS SHEAVES;
GLASS ( 70%)
DEVITRIFIED FROM MARGIN;
CALCITE ( 2-3%)
CELADONITE ( 2-3%)
Alteration - CALCITE
Location: VEINS Replacing: OL
IDDINGSITE
Location: VEINS Replacing: OL
Vesicles -
Percent: 1-2
Filling: CALCITE,CELAD
Shape: ROUND
Leg : 51 Top/Bottom Interval(mm): 680/ 0 Describer: Sinton, J.
Hole: 417D Top of Core Depth(m) : 344.00 Rock Type: IGNEOUS
Core: 22 Sample Midpoint(m) : 350.68 Sect/Pc #: 5/PCE 3D
ROCK = PLAG PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 15%)
Size(mm): TO 3.5
APPROX COMP AN85*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): .5 Morphology: SKELETAL
APPROX COMP AN>50;
CLINOPYROXENE ( 40%)
Morphology: QUENCHED
MAGNETITE ( 1-3%)
CELADONITE ( 1-3%)
Alteration - CALCITE
Location: VESICLES
Vesicles -
Size(mm): .2
Percent: 1
Filling: CALCITE
Shape: ROUND
Leg : 51 Top/Bottom Interval(mm): 200/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 344.00 Rock Type: IGNEOUS
Core: 22 Sample Midpoint(m) : 351.70 Sect/Pc #: 6/PCE 1B
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED;
Texture: PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): TO 1 Morphology: EUHEDRAL
COMPLETELY ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): 2 Morphology: EUHEDRAL
Groundmass - OLIVINE ( 5%)
Size(mm): .04 Morphology: EUHEDRAL-SUBHEDRAL
PLAGIOCLASE ( 40%)
Size(mm): .5 Morphology: PRISMATIC
CLINOPYROXENE ( 30%)
Size(mm): .2 Morphology: ANHEDRAL,QUENCHED
MAGNETITE ( 5%)
Size(mm): .01 Morphology: QUENCHED
GLASS ( <5%)
Alteration - CALCITE
Location: VEINS, Replacing: OL
Location: VESICLES
CLAY MINERALS
Replacing: OL
Vesicles -
Size(mm): <.5
Percent: 1
Filling: CALCITE,CLAY
Shape: ROUND
Leg : 51 Top/Bottom Interval(mm): 100/ 0 Describer: Sinton, J.
Hole: 417D Top of Core Depth(m) : 357.50 Rock Type: IGNEOUS
Core: 26 Sample Midpoint(m) : 359.10 Sect/Pc #: 2/PCE 1A
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 1.5
PLAGIOCLASE ( 15%)
Size(mm): TO 6
APPROX COMP AN85-55*
Groundmass - OLIVINE ( 5%)
COMPLETELY ALTERED;
PLAGIOCLASE (35-40%)
Size(mm): .5 Morphology: SKELETAL,LATHS
APPROX COMP AN<60;
CLINOPYROXENE ( 30%)
Size(mm): .2
MAGNETITE ( 5%)
Size(mm): .01
SULFIDES ( <1%)
Size(mm): .1
Alteration - CALCITE
Replacing: OL
IDDINGSITE
Replacing: OL
CELADONITE
Location: VEINS,
Location: VESICLES
Vesicles -
Percent: 2
Filling: CALCITE,CELAD
Leg : 51 Top/Bottom Interval(mm): 300/ 0 Describer: Sinton, J.
Hole: 417D Top of Core Depth(m) : 357.50 Rock Type: IGNEOUS
Core: 26 Sample Midpoint(m) : 360.80 Sect/Pc #: 3/PCE 1B
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: PORPHYRITIC-GLOMEROPORPHYRITIC*
Phenocrysts- OLIVINE ( 5-7%)
Size(mm): TO 1
PLAGIOCLASE (15-20%)
Size(mm): TO 4
APPROX COMP AN55*
Groundmass - OLIVINE ( 10%)
PLAGIOCLASE ( 35%)
Size(mm): .1-.5
APPROX COMP AN45;
CLINOPYROXENE (25-30%)
Size(mm): .05-.2 Morphology: SKELETAL,PLUMOSE,SHEAF
SOME WITH PLUMOSE AND SHEAF STRUCTURES;
MAGNETITE ( 1-3%)
Alteration - CLAY MINERALS
Location: VEINS, Replacing: OL
Location: VESICLES
CALCITE
Location: VEINS,
Location: VESICLES
Vesicles -
Filling: CALCITE,CLAY
SOME SHRINKAGE*
Leg : 51 Top/Bottom Interval(mm): 760/ 0 Describer: Sinton, J.
Hole: 417D Top of Core Depth(m) : 357.50 Rock Type: IGNEOUS
Core: 26 Sample Midpoint(m) : 362.76 Sect/Pc #: 4/PCE 3A
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH GLASSY CHILLED
MARGINS;
Texture: PORPHYRITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 5-10%)
Size(mm): .2-1
ALTERED;
PLAGIOCLASE (10-15%)
Size(mm): <4.5
APPROX COMP AN45*
Groundmass - OLIVINE ( 15%)
PLAGIOCLASE (30-40%)
CLINOPYROXENE (30-35%)
BARELY CRYSTALLIZED FROM DEVITRIFIED GLASS;
MAGNETITE ( <1%)
Alteration - IDDINGSITE
Replacing: OL
CALCITE
Location: VESICLES,
Location: VEINS
CLAY MINERALS
Location: VESICLES
CELADONITE
Location: VEINS
Vesicles -
Percent: 1-2
Filling: CALCITE,
Filling: CLAY.MINS.
SHRINKAGE*
Leg : 51 Top/Bottom Interval(mm): 170/ 0 Describer: Sinton, J.
Hole: 417D Top of Core Depth(m) : 357.50 Rock Type: IGNEOUS
Core: 26 Sample Midpoint(m) : 365.17 Sect/Pc #: 6/PCE 1B
ROCK = PLAG PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 15%)
Size(mm): 3
APPROX COMP AN65*
Groundmass - OLIVINE ( 10%)
PLAGIOCLASE ( 35%)
Size(mm): .5-1 Morphology: SKELETAL,SHEAVES
CLINOPYROXENE ( 35%)
Size(mm): .5 Morphology: SHEAVES
MAGNETITE ( <1%)
Alteration - CALCITE
Location: VESICLES
CLAY MINERALS
Location: VESICLES
Vesicles -
Percent: 2
Filling: CALCITE,
Filling: CLAY.MINS
Leg : 51 Top/Bottom Interval(mm): 860/ 0 Describer: Sinton, J.
Hole: 417D Top of Core Depth(m) : 366.60 Rock Type: IGNEOUS
Core: 27 Sample Midpoint(m) : 367.46 Sect/Pc #: 1/PCE 4B
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH THICK,GLASSY
CHILLED MARGIN;
Texture: PORPHYRITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 5%)
Size(mm): TO 2
PLAGIOCLASE ( 7-10%)
Size(mm): TO 4
APPROX COMP AN60*
Groundmass - OLIVINE ( 5-10%)
PLAGIOCLASE ( 30%)
Size(mm): .5
CLINOPYROXENE (10-25%)
BARELY CRYSTALLIZED FROM GLASS;
MAGNETITE ( <1%)
GLASS (15-30%)
DEVITRIFIED*
Alteration - CALCITE
Location: VEINS, Replacing: OL
Location: VESICLES
CELADONITE
Location: VEINS,
Location: VESICLES
CLAY MINERALS
Location: VEINS,
Location: VESICLES
Vesicles -
Percent: 2-5
Filling: CELAD,CALCITE,
Shape: ROUND
Filling: CLAY.MINS
Leg : 51 Top/Bottom Interval(mm): 440/ 0 Describer: Sinton, J.
Hole: 417D Top of Core Depth(m) : 366.60 Rock Type: IGNEOUS
Core: 27 Sample Midpoint(m) : 370.04 Sect/Pc #: 3/PCE 4A
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH GLASSY CHILLED
MARGINS;
Texture: PORPHYRITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 4-6%)
Size(mm): TO 2
PLAGIOCLASE (10-15%)
Size(mm): TO 5
APPROX COMP AN55,GLASS INCLUSIONS;
CLINOPYROXENE ( <1%)
Size(mm): 1.2 Morphology: SUBHEDRAL
1 GRAIN IN OPHITIC INTERGROWTH WITH PLAG*
Groundmass - OLIVINE ( 5-10%)
PLAGIOCLASE (20-25%)
CLINOPYROXENE (10-20%)
BARELY CRYSTALLIZED;
MAGNETITE ( <1%)
GLASS (30-35%)
DEVITRIFIED*
Alteration - CALCITE
Location: VEINS, Replacing: OL
Location: VESICLES
CLAY MINERALS
Location: VEINS, Replacing: OL
Location: VESICLES
ANALCITE
Location: VEINS,
Location: VESICLES
Vesicles -
Percent: 3-5
Filling: CALCITE,
Filling: ANALCITE
Leg : 51 Top/Bottom Interval(mm): 250/ 0 Describer: Sinton, J.
Hole: 417D Top of Core Depth(m) : 366.60 Rock Type: IGNEOUS
Core: 27 Sample Midpoint(m) : 372.85 Sect/Pc #: 5/PCE 1A
ROCK = PLAG-OL-CPX PHYRIC BASALT;
SLIGHTLY ALTERED,PILLOW BASALT WITH CHILLED GLASSY
MARGINS;
Texture: PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 5-10%)
Size(mm): TO 2-5
ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): TO 4
APPROX COMP AN60-65,ZONED WITH GLASS INCLUSIONS;
CLINOPYROXENE ( <1%)
Size(mm): .3
1 GRAIN INTERGROWN WITH PLAG*
Groundmass - OLIVINE ( 10%)
Size(mm): .05-.2
PLAGIOCLASE ( 30%)
Size(mm): TO 1 Morphology: SKELETAL,LATHS
CLINOPYROXENE ( 30%)
Size(mm): TO .7 Morphology: SKELETAL,PLUMOSE,SHEAVES
LOCALLY IN SHEAVES;
MAGNETITE ( 1-3%)
Size(mm): .05-.1
GLASS ( <3%)
DEVITRIFIED*
Alteration - CALCITE
Replacing: OL
CLAY
Replacing: OL
IDDINGSITE
Replacing: OL
Vesicles -
Percent: 1-3
Filling: CALCITE,OPAL
IDENTITY UNCERTAIN FOR OPAL*
Leg : 51 Top/Bottom Interval(mm): 320/ 0 Describer: Sinton, J.
Hole: 417D Top of Core Depth(m) : 366.60 Rock Type: IGNEOUS
Core: 27 Sample Midpoint(m) : 375.92 Sect/Pc #: 7/PCE 3
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH GLASSY CHILLED
MARGIN;
Texture: PORPHYRITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE (15-20%)
Size(mm): 3-5
APPROX COMP AN85,SOME PARTIALLY RESORBED;
CLINOPYROXENE ( <1%)
Size(mm): .3 Morphology: ANHEDRAL,ROUNDED
MEGACRYSTS,PARTIALLY RESORBED*
Groundmass - PLAGIOCLASE ( 25%)
Size(mm): .5
MAGNETITE ( <.5%)
GLASS ( 50%)
DEVITRIFIED*
Alteration - CALCITE
Location: VESICLES
CELADONITE
Location: VESICLES
Vesicles -
Percent: 3-4
Filling: CALCITE,CELAD
Shape: ROUND
Leg : 51 Top/Bottom Interval(mm): 1030/ 0 Describer: Sinton, J.
Hole: 417D Top of Core Depth(m) : 375.70 Rock Type: IGNEOUS
Core: 28 Sample Midpoint(m) : 376.73 Sect/Pc #: 1/PCE 3C
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH 1-2CM THICK GLASSY
CHILLED MARGINS;
Texture: GLOMEROPORPHYRITIC,INTERSERTAL,PORPHYRITIC*
Phenocrysts- OLIVINE ( 5%)
Size(mm): TO 3.5
ALTERED;
PLAGIOCLASE (15-20%)
APPROX COMP AN55,GLASS INCLUSIONS;
CLINOPYROXENE ( 1-2%)
Size(mm): .5
2V>50,GLOMEROCRYSTS WITH OL AND PLAG*
Groundmass - OLIVINE ( 10%)
ALTERED;
PLAGIOCLASE ( 35%)
CLINOPYROXENE (20-25%)
Morphology: SKELETAL,PLUMOSE
LOCALLY PLUMOSE;
MAGNETITE ( 2-4%)
Morphology: DENDRITIC
SULFIDES ( 1%)
Size(mm): 1 Morphology: IRREGULAR
1 BIG GRAIN*
Alteration - CALCITE
Replacing: OL
IDDINGSITE
Replacing: OL
Vesicles -
Percent: 5-7
Filling: CALCITE
Leg : 51 Top/Bottom Interval(mm): 380/ 0 Describer: Juteau, T.
Hole: 417D Top of Core Depth(m) : 375.70 Rock Type: IGNEOUS
Core: 28 Sample Midpoint(m) : 377.58 Sect/Pc #: 2/PCE 2B
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: PORPHYRITIC;
Texture: PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( <.2%)
Size(mm): <1 Morphology: IDIOMORPHIC
PSEUDOMORPHED;
PLAGIOCLASE ( 15%)
Size(mm): 2-5 Morphology: IDIOMORPHIC
MARGINAL ZONING*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): .1-.5 Morphology: MICROLITES,FORKED,HOLLOW
CLINOPYROXENE ( 30%)
Size(mm): .2-.5 Morphology: INTERSTITIAL PLUMOSE,CURVED,
AUGITIC;
TITANOMAGNETITE ( 15%)
Size(mm): <.2
Alteration - CALCITE
Replacing: OL
PSEUDOMORPHS AFTER OL;
CLAY MINERALS
Replacing: OL
PSEUDOMORPHS AFTER OL*
Vesicles -
Size(mm): <1
Percent: <1
Filling: CALCITE
Leg : 51 Top/Bottom Interval(mm): 320/ 0 Describer: Juteau, T.
Hole: 417D Top of Core Depth(m) : 375.70 Rock Type: IGNEOUS
Core: 28 Sample Midpoint(m) : 383.52 Sect/Pc #: 6/PCE 2B2
ROCK = PLAG-OL PHYRIC BASALT
SLIGHTLY ALTERED,PILLOW BASALT;
Texture: PORPHYRITIC,INTERSERTAL;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( <.5%)
Size(mm): TO 1 Morphology: IDIOMORPHIC
PSEUDOMORPHED TO CALCITE;
PLAGIOCLASE ( 15%)
Size(mm): 2-6 Morphology: IDIOMORPHIC
STRONGLY ZONED,CLUSTERS*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): .5-2 Morphology: FORKED, ELONGATE
CLINOPYROXENE ( 35%)
Morphology: PLUMOSE,CURVED
TITANOMAGNETITE ( 10%)
Alteration - CALCITE
Replacing: OL,PLAG
PSEUDOMORPHS AFTER OL;
CELADONITE
Location: VEINS,PHENOS Replacing: OL
Vesicles -
Size(mm): <.05
Percent: <.5
Filling: CALCITE
Shape: ROUND
Leg : 51 Top/Bottom Interval(mm): 60/ 0 Describer: Juteau, T.
Hole: 417D Top of Core Depth(m) : 375.70 Rock Type: IGNEOUS
Core: 28 Sample Midpoint(m) : 384.76 Sect/Pc #: 7/PCE 1A
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH CHILLED MARGINS;
Texture: PORPHYRITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): 1-2 Morphology: IDIOMORPHIC
PLAGIOCLASE ( 15%)
Size(mm): 1-5 Morphology: IDIOMORPHIC
GLASS INCLUSIONS*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): .1-.5 Morphology: MICROLITES
INTERSTITIAL;
CLINOPYROXENE ( 20%)
Size(mm): .3-.5 Morphology: QUENCHED,PLUMOSE
TITANOMAGNETITE ( 20%)
INTERSTITIAL*
Alteration - CALCITE
Replacing: OL
PSEUDOMORPHS AFTER OL;
CALCITE
Replacing: PLAG PHENOS
Vesicles -
Size(mm): <1
Percent: <1
Filling: CALCITE
Shape: ROUND
Leg : 51 Top/Bottom Interval(mm): 860/ 0 Describer: Juteau, T.
Hole: 417D Top of Core Depth(m) : 384.80 Rock Type: IGNEOUS
Core: 29 Sample Midpoint(m) : 387.16 Sect/Pc #: 2/PCE 3E
ROCK = PLAG-OL PHYRIC BASALT
SLIGHTLY ALTERED,PILLOW BASALT;
Texture: PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): 1-3 Morphology: IDIOMORPHIC
ALTERED;
PLAGIOCLASE (10-15%)
Size(mm): 2-6 Morphology: IDIOMORPHIC
ZONED,FRESH;
CLINOPYROXENE ( <.5%)
Size(mm): 1 Morphology: ANHEDRAL
FRESH*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): .2-1 Morphology: SKELETAL,FORKED,HOLLOW
CLINOPYROXENE ( 20%)
Size(mm): .2-.5
AUGITIC,INTERSTITIAL,TINY INTERGROWTHS WITH FE
OXIDES;
TITANOMAGNETITE ( 15%)
Size(mm): .3 Morphology: GRANULAR
GLASS ( 5%)
INTERSTITIAL,DEVITRIFIED*
Alteration - CLAY MINERALS
Replacing: OL
CELADONITE
Replacing: OL
Vesicles -
Size(mm): <1
Percent: <1
Filling: CALCITE,CLAY
Shape: ROUND
SHRINKAGE,FILLING HAS CLAY RIM AND CALCITE CORE*
Leg : 51 Top/Bottom Interval(mm): 580/ 0 Describer: Juteau, T.
Hole: 417D Top of Core Depth(m) : 384.80 Rock Type: IGNEOUS
Core: 29 Sample Midpoint(m) : 388.38 Sect/Pc #: 3/PCE 3A
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH GLASSY CHILLED
MARGINS;
Texture: PORPHYRITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 3-4%)
Size(mm): 1-3 Morphology: IDIOMORPHIC
PSEUDOMORPHED;
PLAGIOCLASE ( 8%)
Size(mm): 2-4 Morphology: IDIOMORPHIC
ZONED,FRESH;
CLINOPYROXENE ( <1%)
Size(mm): 1-2 Morphology: ANHEDRAL,ROUNDED
FRESH*
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): .2-.6 Morphology: MICROLITES,SKELETAL,HOLLOW,
Morphology: FORKED
CLINOPYROXENE ( 15%)
Morphology: PLUMOSE OR RADIATING
TITANOMAGNETITE ( 10%)
HEMATITE ( 10%)
SUB-OPAQUE GROUNDMASS*
Alteration - CALCITE
Replacing: OL
CLAY MINERALS (S %)
Replacing: OL
FERROUS OXIDE
Replacing: OL
Vesicles -
Size(mm): <1
Percent: <1
Filling: CALCITE,CLAY
Shape: ROUND
Leg : 51 Top/Bottom Interval(mm): 650/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 384.80 Rock Type: IGNEOUS
Core: 29 Sample Midpoint(m) : 391.45 Sect/Pc #: 5/PCE 2D
ROCK = PLAG-OL PHYRIC BASALT
SLIGHTLY ALTERED,PILLOW BASALT;
Texture: OPHITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 1 Morphology: EUHEDRAL
PLAGIOCLASE ( 20%)
Size(mm): 4 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( .5%)
Size(mm): 1
PARTIALLY RESORBED*
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): 1 Morphology: PRISMATIC
CLINOPYROXENE ( 30%)
Size(mm): .5 Morphology: ANHEDRAL
MAGNETITE ( 5%)
Morphology: EUHEDRAL,DENDRITIC
GLASS ( <5%)
ALTERED*
Alteration - CLAY MINERALS
Location: VESICLES Replacing: GLASS,PLAG
CALCITE
Location: VESICLES
Vesicles -
Filling: CALCITE,CLAY
Shape: ROUND
Leg : 51 Top/Bottom Interval(mm): 720/ 0 Describer: Juteau, T.
Hole: 417D Top of Core Depth(m) : 384.80 Rock Type: IGNEOUS
Core: 29 Sample Midpoint(m) : 394.52 Sect/Pc #: 7/PCE 2C
ROCK = PLAG-OL PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: PORPHYRITIC,INTERSERTAL;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 1 Morphology: IDIOMORPHIC
PLAGIOCLASE ( 15%)
Size(mm): 2-5 Morphology: IDIOMORPHIC
APPROX COMP AN60,ZONED MARGINS,FRESH*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): .2-2 Morphology: LAHTS
FRESH;
CLINOPYROXENE ( 35%)
Morphology: INTERGRANULAR,SOMETIMES
Morphology: POIKILITIC;
FRESH,AUGITIC;
TITANOMAGNETITE ( 5-10%)
Size(mm): .2-.3
GLASS ( 1-2%)
INTERSTITIAL*
Alteration - CALCITE
Location: VESICLES Replacing: OL
CLAY MINERALS (S %)
Replacing: OL
CELADONITE
Location: VESICLES Replacing: OL
Vesicles -
Size(mm): TO 1
Percent: 1
Filling: CALCITE,CELAD
Shape: ROUND
Leg : 51 Top/Bottom Interval(mm): 380/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 393.90 Rock Type: IGNEOUS
Core: 30 Sample Midpoint(m) : 395.78 Sect/Pc #: 2/PCE 1D
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: HYALOOPHITIC,PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): .5 Morphology: EUHEDRAL
COMPLETELY ALTERED;
PLAGIOCLASE ( 20%)
Size(mm): 2 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( <.5%)
Size(mm): .2
AS PARTIALLY RESORBED INCLUSIONS IN PLAG*
Groundmass - OLIVINE ( 10%)
Size(mm): TO .2 Morphology: EUHEDRAL
PLAGIOCLASE ( 30%)
Size(mm): <.5 Morphology: TABULAR,QUENCHED
CLINOPYROXENE ( 30%)
Size(mm): <.5 Morphology: QUENCHED
MAGNETITE ( 5%)
Morphology: QUENCHED,DENDRITIC
GLASS ( <5%)
ALTERED*
Alteration - CARBONATE
Location: VEINS
ARAGONITE
Location: VEINS
ZEOLITE
Location: VEINS
HEMATITE
Location: VEINS Replacing: OLIVINE
ID UNCERTAIN FOR HEMATITE*
Leg : 51 Top/Bottom Interval(mm): 1250/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 393.90 Rock Type: IGNEOUS
Core: 30 Sample Midpoint(m) : 398.15 Sect/Pc #: 3/PCE 3
ROCK = PLAG-CPX PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH CHILLED MARGIN;
Texture: HYALOOPHITIC,VARIOLITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE ( 15%)
Size(mm): 2 Morphology: EUHEDRAL
PARTIALLY RESORBED,PARTIALLY ALTERED;
CLINOPYROXENE ( 2%)
Size(mm): .5
PARTIALLY RESORBED*
Groundmass - PLAGIOCLASE ( 10%)
Size(mm): .5 Morphology: TABULAR
CLINOPYROXENE ( 5%)
Size(mm): .3 Morphology: QUENCHED
GLASS ( >60%)
DEVITRIFIED,SOME FRESH,GOOD VARIOLITIC TEXTURE*
Alteration - CALCITE
Location: VEINS Replacing: PLAG
CLAY MINERALS
Location: VEINS,
Location: VESICLES
Vesicles -
Filling: CALCITE,CLAY
Leg : 51 Top/Bottom Interval(mm): 580/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 393.90 Rock Type: IGNEOUS
Core: 30 Sample Midpoint(m) : 398.98 Sect/Pc #: 4/PCE 4A
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH CHILLED MARGINS;
Texture: INTERSERTAL;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 1.5 Morphology: EUHEDRAL
PLAGIOCLASE ( 20%)
Size(mm): 4 Morphology: EUHEDRAL
RIM ZONAL STR;
CLINOPYROXENE ( .5%)
Size(mm): 1
PARTIALLY RESORBED*
Groundmass - OLIVINE ( 5%)
Morphology: EUHEDRAL-SUBHEDRAL
PLAGIOCLASE ( 30%)
Size(mm): 1 Morphology: PRISMATIC,QUENCHED
CLINOPYROXENE ( 30%)
Size(mm): .5 Morphology: QUENCHED
MAGNETITE ( 5%)
Morphology: EUHEDRAL-DENDRITIC
Alteration - CLAY
Replacing: OL
Vesicles -
Filling: CALCITE
Leg : 51 Top/Bottom Interval(mm): 460/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 393.90 Rock Type: IGNEOUS
Core: 30 Sample Midpoint(m) : 401.86 Sect/Pc #: 6/PCE 5B
ROCK = PLAG-CPX PHYRIC BASALT
SLIGHTLY ALTERED,PILLOW BASALT;
Texture: HYALOOPHITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 1 Morphology: EUHEDRAL
PLAGIOCLASE ( 20%)
Size(mm): 4 Morphology: EUHEDRAL
CLINOPYROXENE ( .5%)
Size(mm): .5
PARTIALLY RESORBED*
Groundmass - PLAGIOCLASE ( 10%)
Size(mm): .5 Morphology: QUENCHED
CLINOPYROXENE ( 20%)
Size(mm): .5 Morphology: QUENCHED
ALTERED;
GLASS ( 50%)
DEVITRIFIED*
Alteration - CALCITE
Location: VEINS,
Location: VESICLES
Vesicles -
Size(mm): .2
Percent: 2
Filling: CALCITE,CLAY
Leg : 51 Top/Bottom Interval(mm): 720/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 393.90 Rock Type: IGNEOUS
Core: 30 Sample Midpoint(m) : 405.12 Sect/Pc #: 8/PCE 8
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: HYALOOPHITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 1 Morphology: EUHEDRAL
PLAGIOCLASE ( 20%)
Size(mm): 2 Morphology: EUHEDRAL
PARTIALLY RESORBED,PARTIALLY ALTERED;
CLINOPYROXENE ( 3%)
Size(mm): .5
PARTIALLY RESORBED*
Groundmass - OLIVINE ( 5%)
PLAGIOCLASE ( 20%)
Size(mm): .5 Morphology: QUENCHED,PRISMATIC,
Morphology: SWALLOWTAIL CRYSTALS;
CLINOPYROXENE ( 20%)
Morphology: QUENCHED
MAGNETITE ( 5%)
GLASS ( 20%)
FRESH TO PARTIALLY DEVITRIFIED*
Alteration - CLAY MINERALS
Replacing: OL,PLAG PHENOS
Vesicles -
Filling: CLAY.MINS
Shape: ROUND
Leg : 51 Top/Bottom Interval(mm): 300/ 0 Describer: Juteau, T.
Hole: 417D Top of Core Depth(m) : 403.00 Rock Type: IGNEOUS
Core: 31 Sample Midpoint(m) : 403.30 Sect/Pc #: 1/PCE 2B
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH BRECCIATED GLASSY
MARGINS;
Texture: PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 2-3 Morphology: IDIOMORPHIC
ALTERED;
PLAGIOCLASE ( 10%)
Size(mm): 2-4 Morphology: IDIOMORPHIC
CLINOPYROXENE ( <1%)
Size(mm): 1-2
CORRODED,NOT ALTERED*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): .2-1 Morphology: HOLLOW,SKELETAL,FORKED
CLINOPYROXENE ( 20%)
Morphology: PLUMOSE,CURVED
CRYSTALLINE BY PODS;
COMBINATION ( 30%)
INCLUDES HEMATITE+MAGNETITE+ALTERED GLASS,SUB-
OPAQUE*
Alteration - CALCITE
Replacing: OL
CLAY MINERALS
Replacing: OL
CELADONITE
Replacing: OL
Vesicles -
Size(mm): <1
Percent: 1
Filling: CALCITE,CLAY
SOME SHRINKAGE VESICLES*
Leg : 51 Top/Bottom Interval(mm): 960/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 403.00 Rock Type: IGNEOUS
Core: 31 Sample Midpoint(m) : 406.96 Sect/Pc #: 3/PCE 1H
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: INTERSERTAL;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): 2 Morphology: EUHEDRAL
COMPLETELY ALTERED;
PLAGIOCLASE ( 20%)
Size(mm): 3 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( .5%)
Size(mm): 1
PARTIALLY RESORBED*
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): 1 Morphology: PRISMATIC
CLINOPYROXENE ( 30%)
Size(mm): .5 Morphology: ANHEDRAL
MAGNETITE ( 5%)
Size(mm): .02 Morphology: PRISMATIC-DENDRITIC
GLASS ( <5%)
Alteration - CALCITE
Replacing: OL
CLAY MINERALS
Replacing: OL PHENOS,GLASS
Vesicles -
Filling: CALCITE
Leg : 51 Top/Bottom Interval(mm): 280/ 0 Describer: Juteau, T.
Hole: 417D Top of Core Depth(m) : 403.00 Rock Type: IGNEOUS
Core: 31 Sample Midpoint(m) : 407.78 Sect/Pc #: 4/PCE 2A
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: PORPHYRITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 1-2 Morphology: IDIOMORPHIC
ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): 1-2 Morphology: IDIOMORPHIC
ZONED,FRESH;
CLINOPYROXENE ( <1%)
Size(mm): 2-3
ROUNDED,AUGITIC,FRESH*
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): <1 Morphology: HOLLOW,SKELETAL,FORKED
CLINOPYROXENE ( 15%)
Morphology: PLUMOSE
TITANOMAGNETITE ( 20%)
Size(mm): <.3 Morphology: SKELETAL
VERY FINE-GRAINED;
GLASS ( 15%)
DEVITRIFIED,GLASSY SHARDS IN 5 MM WIDE CALCITE
VEIN*
Alteration - CALCITE
Replacing: OL
FERROUS OXIDE
Location: CALCITE VEIN Replacing: GLASS
Vesicles -
Size(mm): <.3
Percent: <1
Filling: CLAY.MIN,
Shape: ROUND
Filling: DEVT.GLS
SHRINKAGE*
Leg : 51 Top/Bottom Interval(mm): 410/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 403.00 Rock Type: IGNEOUS
Core: 31 Sample Midpoint(m) : 409.41 Sect/Pc #: 5/PCE 2D
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: HYALOOPHITIC,PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 2 Morphology: EUHEDRAL
PLAGIOCLASE ( 15%)
Size(mm): 1-4 Morphology: EUHEDRAL
FRESH,RARE CPX INCLUSION;
CLINOPYROXENE ( 1%)
Size(mm): 2
2V 50,PARTIALLY RESORBED*
Groundmass - OLIVINE ( 5%)
Size(mm): .1
ALTERED;
PLAGIOCLASE ( 25%)
Size(mm): .5 Morphology: QUENCHED,ACICULAR,
Morphology: SWALLOWTAIL
CLINOPYROXENE ( 40%)
Size(mm): .3 Morphology: QUENCHED,
GLASS
ALTERED*
Alteration - CLAY MINERALS
Replacing: OL,GLASS
KFELDSPAR
Location: NEAR VEIN Replacing: PLAG
Leg : 51 Top/Bottom Interval(mm): 950/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 412.10 Rock Type: IGNEOUS
Core: 32 Sample Midpoint(m) : 413.05 Sect/Pc #: 1/PCE 3E
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: OPHITIC,PORPHYRITIC;
Where sampled: MARGINAL PART OF MASSIVE BASALT*
Phenocrysts- OLIVINE ( 2%)
Size(mm): .3 Morphology: EUHEDRAL-ANHEDRAL
PLAGIOCLASE ( 15%)
Size(mm): 3 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( 2%)
Size(mm): .5
PARTIALLY RESORBED*
Groundmass - OLIVINE ( 10%)
Size(mm): .2 Morphology: EUHEDRAL
PLAGIOCLASE ( 20%)
Size(mm): .8 Morphology: TABULAR,QUENCHED
CLINOPYROXENE ( 35%)
Size(mm): .5 Morphology: ANHEDRAL,QUENCHED
MAGNETITE ( 5%)
Size(mm): .02 Morphology: GRANULAR,QUENCHED
Alteration - CLAY MINERALS
Replacing: OL
Leg : 51 Top/Bottom Interval(mm): 570/ 0 Describer: Juteau, T.
Hole: 417D Top of Core Depth(m) : 412.10 Rock Type: IGNEOUS
Core: 32 Sample Midpoint(m) : 417.17 Sect/Pc #: 4/PCE 1B
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: PORPHYRITIC,SUB-OPHITIC*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): 1 Morphology: IDIOMORPHIC
PSEUDOMORPHED;
PLAGIOCLASE ( 10%)
Size(mm): 2-5 Morphology: IDIOMORPHIC
APPROX COMP AN60 BY EXTINCTION METHOD,ZONED
MARGINS,GLASSY INCLUSIONS,FRESH;
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): .5-1 Morphology: LATHS
FRESH;
PLAGIOCLASE
Size(mm): .2
CLINOPYROXENE ( 40%)
Size(mm): .5-1 Morphology: INTERGRANULAR
FRESH,AUGITIC;
TITANOMAGNETITE ( 5%)
Size(mm): .2 Morphology: GRANULAR
CLAY MINERALS ( 2-3%)
INTERSTITIAL,FROM PRIMARY GLASS?*
Alteration - CALCITE
Replacing: OL
CLAY MINERALS
Replacing: OL
CELADONITE
Replacing: OL
Leg : 51 Top/Bottom Interval(mm): 600/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 412.10 Rock Type: IGNEOUS
Core: 32 Sample Midpoint(m) : 420.20 Sect/Pc #: 6/PCE 1E
ROCK = PLAG PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: OPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 15%)
Size(mm): 4 Morphology: EUHEDRAL-SUBHEDRAL
Groundmass - OLIVINE ( 10%)
Size(mm): .2 Morphology: EUHEDRAL
PLAGIOCLASE ( 30%)
Size(mm): 1 Morphology: PRISMATIC
CLINOPYROXENE ( 30%)
Size(mm): .4 Morphology: ANHEDRAL
MAGNETITE ( 5%)
Size(mm): .1 Morphology: GRANULAR-TABULAR
GLASS ( 5%)
Alteration - CLAY MINERALS
Replacing: OL,GLASS
Leg : 51 Top/Bottom Interval(mm): 850/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 421.10 Rock Type: IGNEOUS
Core: 33 Sample Midpoint(m) : 421.95 Sect/Pc #: 1/PCE 3D
ROCK = PLAG-CPX PHYRIC BASALT
MOD ALTERED;
Texture: OPHITIC,PORPHYRITIC;
Where sampled: MASSIVE BASALT*
Phenocrysts- PLAGIOCLASE ( 10%)
Size(mm): 3 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( 2%)
Size(mm): 2 Morphology: SUBHEDRAL-ANHEDRAL
Groundmass - OLIVINE ( 10%)
Size(mm): .2 Morphology: EUHEDRAL-SUBHEDRAL
PLAGIOCLASE ( 30%)
Size(mm): .5 Morphology: ANHEDRAL-SUBHEDRAL
CLINOPYROXENE ( 30%)
Size(mm): .5 Morphology: ANHEDRAL-SUBHEDRAL
MAGNETITE ( 3%)
Size(mm): .05 Morphology: ANHEDRAL
Alteration - CLAY MINERALS
Replacing: OL
Leg : 51 Top/Bottom Interval(mm): 1300/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 421.10 Rock Type: IGNEOUS
Core: 33 Sample Midpoint(m) : 425.40 Sect/Pc #: 3/PCE 5
ROCK = PLAG-CPX PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: OPHITIC,PORPHYRITIC;
Where sampled: MASSIVE BASALT*
Phenocrysts- PLAGIOCLASE ( 10%)
Size(mm): 6 Morphology: SUBHEDRAL
CLINOPYROXENE ( 10%)
Size(mm): 2 Morphology: ANHEDRAL
Groundmass - OLIVINE ( 10%)
Size(mm): .2
ALTERED;
PLAGIOCLASE ( 30%)
Size(mm): 2 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( 30%)
Size(mm): .5 Morphology: ANHEDRAL
MAGNETITE ( 3%)
Size(mm): .1 Morphology: EUHEDRAL-SUBHEDRAL
Alteration - CLAY MINERALS
Replacing: OL
Leg : 51 Top/Bottom Interval(mm): 1230/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 421.10 Rock Type: IGNEOUS
Core: 33 Sample Midpoint(m) : 428.33 Sect/Pc #: 5/PCE 4
ROCK = PLAG PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: OPHITIC,PORPHYRITIC;
Where sampled: MASSIVE BASALT*
Phenocrysts- PLAGIOCLASE ( 20%)
Size(mm): 3 Morphology: EUHEDRAL-SUBHEDRAL
Groundmass - OLIVINE ( 10%)
Size(mm): .2 Morphology: EUHEDRAL
PLAGIOCLASE ( 30%)
Size(mm): 1 Morphology: EUHEDRAL,TABULAR
ALTERED;
CLINOPYROXENE ( 30%)
Size(mm): .5 Morphology: SUBHEDRAL-ANHEDRAL
MAGNETITE
Size(mm): .1
Alteration - CLAY MINERALS
Replacing: OL,PLAG
Leg : 51 Top/Bottom Interval(mm): 380/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 429.50 Rock Type: IGNEOUS
Core: 34 Sample Midpoint(m) : 432.88 Sect/Pc #: 3/PCE 1C
ROCK = PLAG PHYRIC BASALT
SLIGHTLY ALTERED,MASSIVE BASALT;
Texture: OPHITIC,PORPHYRITIC*
Phenocrysts- PLAGIOCLASE ( 20%)
Size(mm): 4 Morphology: EUHEDRAL-SUBHEDRAL
Groundmass - OLIVINE ( 10%)
Size(mm): .02 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 30%)
Size(mm): 1 Morphology: EUHEDRAL,PRISMATIC
CLINOPYROXENE ( 30%)
Size(mm): .5 Morphology: EUHEDRAL-ANHEDRAL,PARTIALLY
Morphology: QUENCHED
MAGNETITE ( 5%)
Size(mm): .01 Morphology: EUHEDRAL,DENDRITIC
Alteration - CALCITE
Replacing: OL
CLAY MINERALS
Replacing: OL
Vesicles -
Filling: CALCITE,CLAY
Leg : 51 Top/Bottom Interval(mm): 850/ 0 Describer: Juteau, T.
Hole: 417D Top of Core Depth(m) : 429.50 Rock Type: IGNEOUS
Core: 34 Sample Midpoint(m) : 436.35 Sect/Pc #: 5/PCE 1D
ROCK = PLAG-OL PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: PORPHYRITIC,INTERSERTAL;
Where sampled: 28 CM FROM BOTTOM MARGIN OF "DOLERITE" CHILLED
ZONE*
Phenocrysts- OLIVINE ( 1-2%)
Size(mm): 2-3 Morphology: IDIOMORPHIC
PSEUDOMORPHED;
PLAGIOCLASE ( 10%)
Size(mm): 3-8 Morphology: IDIOMORPHIC
FRESH,ZONED*
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): .2-.8 Morphology: MICROLITES,HOLLOW,FORKED
CLUSTERS OF CPX-PLAG WITH SUBOPHITIC TEXTURE;
PLAGIOCLASE
Size(mm): 2-4 Morphology: EUHEDRAL,LATHS
CLINOPYROXENE ( 35%)
Size(mm): .3-.6 Morphology: INTERGRANULAR,RADIATING
CLINOPYROXENE
Size(mm): 3-4
AUGITIC,RADIATING AND CURVED CRYSTALS;
TITANOMAGNETITE ( 5%)
Size(mm): .2-.5 Morphology: GRANULAR
COMBINATION
INCLUDES CALCITE+CLAY.MINS,INTERSTITIAL*
Alteration - CALCITE
Replacing: OL
CLAY MINERALS
Replacing: OL
Leg : 51 Top/Bottom Interval(mm): 310/ 0 Describer: Juteau, T.
Hole: 417D Top of Core Depth(m) : 437.80 Rock Type: IGNEOUS
Core: 35 Sample Midpoint(m) : 439.61 Sect/Pc #: 2/PCE 2A
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH GLASSY MARGINS;
Texture: PORPHYRITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 1-2%)
Size(mm): 2-6 Morphology: IDIOMORPHIC
PSEUDOMORPHED;
PLAGIOCLASE ( 15%)
Size(mm): 3-10 Morphology: IDIOMORPHIC
ZONED,FRESH,DEVITRIFIED GLASS INCLUSIONS;
CLINOPYROXENE ( <1%)
Size(mm): 2-3
AUGITIC*
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): .1-.5 Morphology: MICROLITES,SKELETAL,HOLLOW,
Morphology: FORKED
CLINOPYROXENE ( 25%)
Morphology: INTERSTITIAL,PLUMOSE,QUENCHED
AUGITIC;
MAGNETITE ( 5%)
Size(mm): <.1-.2
DUST OF VERY FINE GRAINS;
SMECTITE ( 5%)
Morphology: INTERSTITIAL
Alteration - CALCITE
Location: VEINS Replacing: OL
PSEUDOMORPH AFTER OL;
FERROUS OXIDE
Location: VEINS Replacing: OL
PSEUDOMORPH AFTER OL;
CELADONITE
Location: VEINS
NUMEROUS VEINS*
Leg : 51 Top/Bottom Interval(mm): 50/ 0 Describer: Juteau, T.
Hole: 417D Top of Core Depth(m) : 437.80 Rock Type: IGNEOUS
Core: 35 Sample Midpoint(m) : 442.35 Sect/Pc #: 4/PCE 1
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH GLASSY CHILLED
MARGINS;
Texture: PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): 1-4 Morphology: IDIOMORPHIC
PSEUDOMORPHED;
PLAGIOCLASE ( 15%)
Size(mm): 2-3 Morphology: IDIOMORPHIC
ZONED,FRESH,GLASS INCLUSIONS;
CLINOPYROXENE ( <1%)
Size(mm): 1-3
PARTIALLY RESORBED,AUGITIC,FRESH*
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): .2-.5 Morphology: MICROLITE,HOLLOW,QUENCHED
CLINOPYROXENE ( 30%)
Size(mm): .2-.5 Morphology: PLUMOSE,QUENCHED,
Morphology: INTERGRANULAR
MAGNETITE ( 5%)
Size(mm): .2 Morphology: GRANULAR
SMECTITE ( 2-3%)
INTERSTITIAL*
Alteration - TALC
Replacing: OL
SERPENTINITE
Replacing: OL
PSEUDOMORPHS AFTER OL;
SMECTITE
Replacing: GLASS
Vesicles -
Percent: <1
Filling: CALCITE,CLAY
Shape: ROUND
Leg : 51 Top/Bottom Interval(mm): 880/ 0 Describer: Juteau, T.
Hole: 417D Top of Core Depth(m) : 437.80 Rock Type: IGNEOUS
Core: 35 Sample Midpoint(m) : 446.18 Sect/Pc #: 6/PCE 6B
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 1-2%)
Size(mm): 1-2 Morphology: IDIOMORPHIC
PSEUDOMORPHED;
PLAGIOCLASE ( 10%)
Size(mm): 2-4 Morphology: IDIOMORPHIC
ZONED,FRESH;
CLINOPYROXENE ( <1%)
Size(mm): 1-2
PARTIALLY RESORBED,FRESH,AUGITIC*
Groundmass - PLAGIOCLASE ( 40%)
Morphology: MICROLITES,HOLLOW,SKELETAL
CLINOPYROXENE ( 45%)
Morphology: PLUMOSE,RADIATING AND CURVED,
Morphology: QUENCHED
TITANOMAGNETITE ( 3-5%)
Size(mm): .2-.3 Morphology: GRANULAR
CLAY MINERALS ( 1-2%)
CALCITE ( <1%)
INTERSTITIAL*
Alteration - CALCITE
Replacing: OL
PSEUDOMORPHS AFTER OL;
CLAY MINERALS
Replacing: OL
PSEUDOMORPHS AFTER OL;
SERPENTINITE
Replacing: OL
PSEUDOMORPHS AFTER OL*
TALC
Replacing: OL
Vesicles -
Size(mm): 1
Percent: <1
Filling: CALCITE
Shape: ROUND
Leg : 51 Top/Bottom Interval(mm): 450/ 0 Describer: Juteau, T.
Hole: 417D Top of Core Depth(m) : 445.50 Rock Type: IGNEOUS
Core: 36 Sample Midpoint(m) : 445.95 Sect/Pc #: 1/PCE 2C
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): 1-5 Morphology: IDIOMORPHIC
PSEUDOMORPHED;
PLAGIOCLASE ( 15%)
Size(mm): 2-4 Morphology: IDIOMORPHIC
ZONED,FRESH;
CLINOPYROXENE ( 1-2%)
Size(mm): 1-2 Morphology: ROUNDED
FRESH, AUGITIC*
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): .2-.6 Morphology: MICROLITES,HOLLOW,FORKED
CLINOPYROXENE ( 40%)
Size(mm): .3-.6 Morphology: PLUMOSE,CURVED,INTERGRANULAR
AUGITIC;
MAGNETITE ( 5%)
Size(mm): .1-.3 Morphology: GRANULAR
CLAY MINERALS ( 3-4%)
INTERSTITIAL*
Alteration - SERPENTINITE
Replacing: OL
PSEUDOMORPH AFTER OL;
TALC
Replacing: OL
Vesicles -
Size(mm): 1
Percent: <1
Filling: CALCITE
Shape: ROUND
Leg : 51 Top/Bottom Interval(mm): 1310/ 0 Describer: Juteau, T.
Hole: 417D Top of Core Depth(m) : 445.50 Rock Type: IGNEOUS
Core: 36 Sample Midpoint(m) : 449.81 Sect/Pc #: 3/PCE 6
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH CHILLED MARGINS;
Texture: PORPHYRITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): 1-3 Morphology: IDIOMORPHIC
PSEUDOMORPHED;
PLAGIOCLASE ( 15%)
Size(mm): 2-5 Morphology: IDIOMORPHIC
ZONED,FRESH,NUMEROUS GLASS INCLUSIONS;
CLINOPYROXENE ( 1-2%)
Size(mm): 2-4 Morphology: POIKILITIC
RESORBED*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): .1-.4 Morphology: MICROLITES,HOLLOW,SKELETAL
MAGNETITE ( 5%)
Size(mm): <.2
DUST OF VERY SMALL GRAINS;
GLASS ( 55%)
DEVITRIFIED,UNIDENTIFIED BROWN RADIATING QUENCHED
MINERAL*
Alteration - CALCITE
Replacing: OL
PSEUDOMORPHS AFTER OL;
CLAY MINERALS
Replacing: OL
PSEUDOMORPHS AFTER OL*
Vesicles -
Size(mm): .5-2
Percent: 1
Filling: CALCITE
Shape: ROUND
Leg : 51 Top/Bottom Interval(mm): 900/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 451.00 Rock Type: IGNEOUS
Core: 37 Sample Midpoint(m) : 454.90 Sect/Pc #: 3/PCE 4C
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH CHILLED GLASSY
MARGINS;
Texture: PORPHYRITIC,VARIOLITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 3%)
Size(mm): .7 Morphology: EUHEDRAL
COMPLETELY ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): 2 Morphology: EUHEDRAL
CLINOPYROXENE ( 3%)
Size(mm): .7
PARTIALLY RESORBED*
Groundmass - PLAGIOCLASE ( 5%)
Size(mm): .1 Morphology: PRISMATIC,PARTIALLY QUENCHED
CLINOPYROXENE ( >20%)
Size(mm): .05 Morphology: QUENCHED
MOSTLY ALTERED;
MAGNETITE ( <5%)
Size(mm): <.01 Morphology: DENDRITIC
GLASS ( >30%)
ALTERED*
Alteration - CALCITE
Replacing: OL
MICROCRYST GROUNDMASS
Replacing: GROUNDMASS
BROWN*
Vesicles -
Filling: CALCITE,CLAY
Shape: ROUND
Leg : 51 Top/Bottom Interval(mm): 1170/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 451.00 Rock Type: IGNEOUS
Core: 37 Sample Midpoint(m) : 458.17 Sect/Pc #: 5/PCE 7B
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: PORPHYRITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 1 Morphology: EUHEDRAL
COMPLETELY ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): 2 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( 5%)
Size(mm): 1
PARTIALLY RESORBED*
Groundmass - OLIVINE ( 5%)
Size(mm): .02 Morphology: EUHEDRAL
COMPLETELY ALTERED;
PLAGIOCLASE ( 20%)
Size(mm): .1 Morphology: EUHEDRAL,TABULAR
CLINOPYROXENE ( 30%)
Size(mm): .05 Morphology: QUENCHED
MAGNETITE ( <5%)
Size(mm): .01 Morphology: DENDRITIC
GLASS ( <10%)
DEVITRIFIED*
Alteration - CALCITE
Replacing: OL
CLAY MINERALS
Replacing: OL
Leg : 51 Top/Bottom Interval(mm): 1300/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 458.30 Rock Type: IGNEOUS
Core: 38 Sample Midpoint(m) : 459.60 Sect/Pc #: 1/PCE 9C
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): .5 Morphology: EUHEDRAL
PLAGIOCLASE ( 20%)
Size(mm): 3 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( 5%)
Size(mm): 1
PARTIALLY RESORBED*
Groundmass - OLIVINE ( 5%)
Size(mm): .05 Morphology: EUHEDRAL-SUBHEDRAL
PLAGIOCLASE ( 20%)
Size(mm): .1 Morphology: EUHEDRAL,TABULAR
CLINOPYROXENE ( 30%)
Size(mm): .05
MAGNETITE ( 5%)
Size(mm): .01 Morphology: DENDRITIC
GLASS ( <10%)
DEVITRIFIED*
Alteration - SMECTITE
Replacing: OL
GREEN SMECTITE*
Vesicles -
Size(mm): .01
Filling: SMECTITE
Leg : 51 Top/Bottom Interval(mm): 1040/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 458.30 Rock Type: IGNEOUS
Core: 38 Sample Midpoint(m) : 465.34 Sect/Pc #: 5/PCE 10B
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH CHILLED MARGINS;
Texture: MICROCRYSTALLINE;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): TO .5 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 30%)
Size(mm): TO .5 Morphology: EUHEDRAL
CLINOPYROXENE ( <.5%)
Size(mm): TO 1
PARTIALLY RESORBED*
Groundmass - OLIVINE ( <10%)
Size(mm): <.01
ALTERED;
PLAGIOCLASE ( 20%)
Size(mm): .03 Morphology: TABULAR
CLINOPYROXENE ( 30%)
Size(mm): .01 Morphology: ANHEDRAL
MAGNETITE ( <5%)
Size(mm): <.005 Morphology: DENDRITIC
GLASS ( <10%)
DEVITRIFIED*
Alteration - SMECTITE
Location: VEINS Replacing: OL
GREEN SMECTITE,
Vesicles -
Filling: SMECTITE
Leg : 51 Top/Bottom Interval(mm): 1380/ 0 Describer: Juteau, T.
Hole: 417D Top of Core Depth(m) : 464.70 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 466.08 Sect/Pc #: 1/PCE 10B
ROCK = HYALOCLASTITE
MOD ALTERED,COMPOSED OF PILLOW BASALT FRAGMENTS;
Texture: BRECCIATED;
Where sampled: HYALOCLASTITE BRECCIA BETWEEN PILLOWS*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 1 Morphology: EUHEDRAL
PSEUDOMORPHED;
PLAGIOCLASE ( 2-3%)
Size(mm): 1-2 Morphology: EUHEDRAL
NUMEROUS GLASS INCLUSIONS;
CLINOPYROXENE ( 1%)
AS PARTIALLY RESORBED MEGACRYSTS OR IN CLUSTERS
WITH PLAG,AUGITIC*
Groundmass - PLAGIOCLASE ( 1-2%)
Morphology: MICROLITES,IDIOMORPHIC
GLASS ( 95%)
GLASS IS PALE GREEN-TRANSFORMS TO FIBROUS GREEN
PALAGONITIC MATERIAL ON ALL MARGINS OF THE GLASS
FRAGMENTS,ORGANIZED IN DELICATE CONCENTRIC LAYERS,
CEMENT IS A GREEN ISOTROPIC GLASS;
CALCITE ( TR%)
Alteration - SMECTITE
Replacing: OL
GREEN SMECTITE*
Leg : 51 Top/Bottom Interval(mm): 370/ 0 Describer: Sinton, J.
Hole: 417D Top of Core Depth(m) : 464.70 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 466.57 Sect/Pc #: 2/PCE 1D
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH CHILLED MARGINS;
Texture: PORPHYRITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 5-7%)
Size(mm): TO 4
ALTERED;
PLAGIOCLASE (10-15%)
Size(mm): TO 4
APPROX COMP AN70-75;
CLINOPYROXENE ( 3%)
Size(mm): TO 3 Morphology: ROUNDED
2V>50,ROUNDED WITH SECTOR ZONING AND WAVY
EXTINCTION,OCCURS AS ISOLATED CRYSTALS OR WITH
PLAG IN GLOMEROCRYSTS*
Groundmass - PLAGIOCLASE ( 10%)
Size(mm): .2 Morphology: SKELETAL
GLASS ( 70%)
DEVITRIFIED*
Alteration - CALCITE
Replacing: OL
CLAY MINERALS
Replacing: OL
Vesicles -
Size(mm): <.4
Percent: 1
Filling: CALCITE
Leg : 51 Top/Bottom Interval(mm): 400/ 0 Describer: Sinton, J.
Hole: 417D Top of Core Depth(m) : 464.70 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 468.10 Sect/Pc #: 3/PCE 1C
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED;
Texture: PORPHYRITIC,INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 3-5%)
Size(mm): <1.5
PLAGIOCLASE ( 15%)
Size(mm): <3
APPROX COMP AN60;
CLINOPYROXENE ( 1%)
Size(mm): 1
WAVY EXTINCTION*
Groundmass - OLIVINE ( 5%)
Size(mm): .1
COMPLETELY ALTERED;
PLAGIOCLASE ( 30%)
Size(mm): .2
APPROX COMP AN52-60;
CLINOPYROXENE ( 35%)
Size(mm): .1
SOME ARE SUBOPHITIC-HOURGLASS WITH PLAG*
MAGNETITE ( 5-10%)
Size(mm): .2
PARTIALLY ALTERED*
Alteration - SMECTITE
Location: VESICLES Replacing: OL
GREEN SMECTITE;
CALCITE
Location: VEIN
Vesicles -
Percent: 1-2
Filling: SMECTITE
Leg : 51 Top/Bottom Interval(mm): 260/ 0 Describer: Rusinov, V.
Hole: 417D Top of Core Depth(m) : 464.70 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 470.96 Sect/Pc #: 5/PCE 1A
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH LOCALLY GLASSY
CHILLED MARGINS;
Phenocrysts- OLIVINE ( 2%)
Size(mm): 3 Morphology: PRISMATIC
COMPLETELY ALTERED;
PLAGIOCLASE ( 50%)
Size(mm): 1-3 Morphology: TABULAR
ZONED WITH AN75 CORES AND AN 68 RIMS;
CLINOPYROXENE ( 1%)
Size(mm): .3-.5 Morphology: PRISMATIC
Groundmass - PLAGIOCLASE ( 15%)
Size(mm): .75 Morphology: TABULAR,QUENCHED
APPROX COMP AN43,SIZE .75MM X .10 MM;
CLINOPYROXENE ( 25%)
Size(mm): .25 Morphology: SPHERULITIC,QUENCHED
MAGNETITE ( 7%)
Size(mm): .05 Morphology: IRREGUALR
Alteration - CALCITE ( 3%)
Location: VEINS,PHENOS Replacing: OL
Leg : 51 Top/Bottom Interval(mm): 1150/ 0 Describer: Rusinov, V.
Hole: 417D Top of Core Depth(m) : 471.00 Rock Type: IGNEOUS
Core: 40 Sample Midpoint(m) : 472.15 Sect/Pc #: 1/PCE 5
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: PORPHYRITIC,MICROLITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): .25-.5 Morphology: PRISMATIC
COMPLETELY ALTERED;
PLAGIOCLASE ( 25%)
Size(mm): .25-.5
FRESH,APPROX COMP AN68-60,NORMALLY ZONED;
CLINOPYROXENE ( <1%)
Size(mm): .25-1 Morphology: PRISMATIC
FRESH*
Groundmass - PLAGIOCLASE ( 7%)
Size(mm): .25 Morphology: TABULAR,QUENCHED
APPROX COMP AN55,DIMENSIONS .25MM X .02MM;
CLINOPYROXENE ( 54%)
Size(mm): .1-.2 Morphology: SPHERULITIC,QUENCHED
COMMONLY POORLY CRYSTALLIZED;
MAGNETITE ( 10%)
Size(mm): .05-.1 Morphology: IRREGULAR
Alteration - CALCITE ( 4%)
Location: VEINS Replacing: OL
PSEUDOMORPHS AFTER OL*
Leg : 51 Top/Bottom Interval(mm): 250/ 0 Describer: Sinton, J.
Hole: 417D Top of Core Depth(m) : 471.00 Rock Type: IGNEOUS
Core: 40 Sample Midpoint(m) : 472.75 Sect/Pc #: 2/PCE 1A
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH GLASSY CHILLED
MARGINS;
Texture: PORPHYRITIC,SUBVARIOLITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 5-6%)
Size(mm): TO 5
PLAGIOCLASE (10-15%)
Size(mm): TO 4
APPROX COMP AN65,CONTAINS DEVITRIFIED GLASS
INCLUSIONS;
CLINOPYROXENE ( 3-4%)
Size(mm): TO 2
2V 55,ZONED,MOST XTLS .3 MM*
Groundmass - OLIVINE ( 5%)
Size(mm): .05-.1
PLAGIOCLASE (30-35%)
Size(mm): .2-.3 Morphology: SKELETAL
CLINOPYROXENE (35-40%)
Size(mm): .1 Morphology: SKELETAL,PLUMOSE RAYS ON SOME
MAGNETITE ( 1-2%)
Size(mm): .02
Alteration - CALCITE
Location: VEINS Replacing: OL
IDDINGSITE
Replacing: OL
CLAY MINERALS
Replacing: OL
Vesicles -
Percent: 1-2
Filling: CELAD
Leg : 51 Top/Bottom Interval(mm): 1450/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 475.60 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 477.05 Sect/Pc #: 1/PCE 7B
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: PORPHYRITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 2 Morphology: EUHEDRAL
COMPLETELY ALTERED;
PLAGIOCLASE ( 20%)
Size(mm): 3 Morphology: EUHEDRAL
CLINOPYROXENE ( 2%)
Size(mm): 1
PARTIALLY RESORBED*
Groundmass - OLIVINE ( 5%)
Size(mm): .2 Morphology: ANHEDRAL
PLAGIOCLASE ( 20%)
Size(mm): .3 Morphology: QUENCHED
CLINOPYROXENE ( 30%)
Size(mm): .2 Morphology: QUENCHED
MAGNETITE ( 5%)
Size(mm): .05
GLASS ( <5%)
DEVITRIFIED*
Alteration - ZEOLITE
Replacing: OL
CLAY MINERALS
Replacing: OL
CALCITE
Location: VESICLES
Vesicles -
Percent: 3
Filling: CALCITE
Leg : 51 Top/Bottom Interval(mm): 1020/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 475.60 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 479.62 Sect/Pc #: 3/PCE 6A
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH STRONGLY ALTERED
CHILLED MARGINS;
Texture: PORPHYRITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 1 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): 3 Morphology: EUHEDRAL
ZONED;
CLINOPYROXENE ( 2%)
Size(mm): .2
PARTIALLY RESORBED*
Groundmass - PLAGIOCLASE ( 5%)
Size(mm): .05 Morphology: QUENCHED
GLASS ( 70%)
VARIOLITIC*
Alteration - CLAY MINERALS
Replacing: OL
CALCITE
Location: VESICLES
Vesicles -
Filling: CALCITE
Leg : 51 Top/Bottom Interval(mm): 500/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 475.60 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 482.10 Sect/Pc #: 5/PCE 2C
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: OPHITIC,PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): 2 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 25%)
Size(mm): 4 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( 5%)
Size(mm): 3 Morphology: ANHEDRAL
Groundmass - OLIVINE ( 5%)
Size(mm): .1 Morphology: EUHEDRAL-SUBHEDRAL
PLAGIOCLASE ( 20%)
Size(mm): .5 Morphology: EUHEDRAL,PRISMATIC
CLINOPYROXENE ( 35%)
Size(mm): .2
MAGNETITE ( 3%)
Size(mm): .03
GLASS ( <5%)
Alteration - CALCITE
Replacing: OL
CLAY MINERALS
Replacing: OL
Vesicles -
Filling: CALCITE,CLAY
Leg : 51 Top/Bottom Interval(mm): 760/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 475.60 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 485.36 Sect/Pc #: 7/PCE 4C
ROCK = PLAG-OL-CPX PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: HYALOOPHITIC,PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 10%)
Morphology: EUHEDRAL-SUBHEDRAL
PARTIALLY FRESH;
PLAGIOCLASE ( 25%)
Size(mm): 3 Morphology: EUHEDRAL
ZONED;
CLINOPYROXENE ( 5%)
PARTIALLY RESORBED*
Groundmass - OLIVINE ( 10%)
Size(mm): .1 Morphology: EUHEDRAL
PLAGIOCLASE ( 20%)
Size(mm): .5 Morphology: EUHEDRAL
CLINOPYROXENE ( 30%)
Size(mm): .2 Morphology: QUENCHED
MAGNETITE ( <5%)
Size(mm): .03 Morphology: DENDRITIC
GLASS ( 10%)
Alteration - CLAY MINERALS
Replacing: OL
Vesicles -
Size(mm): .02
Percent: <1
Filling: CLAY.MINS
Leg : 51 Top/Bottom Interval(mm): 1060/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 484.70 Rock Type: IGNEOUS
Core: 42 Sample Midpoint(m) : 485.76 Sect/Pc #: 1/PCE 4B
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 3 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 30%)
Size(mm): 4 Morphology: EUHEDRAL
CLINOPYROXENE ( .5%)
Size(mm): .5 Morphology: ANHEDRAL
Groundmass - OLIVINE ( 5%)
Size(mm): .1 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 20%)
Size(mm): .5 Morphology: EUHEDRAL,TABULAR,PARTIALLY
Morphology: QUENCHED
CLINOPYROXENE ( 30%)
Size(mm): .2 Morphology: EUHEDRAL,QUENCHED
MAGNETITE ( <5%)
Alteration - CLAY MINERALS
Replacing: OL
Vesicles -
Size(mm): <.5
Percent: <1
Filling: CLAY.MIN
Leg : 51 Top/Bottom Interval(mm): 310/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 484.70 Rock Type: IGNEOUS
Core: 42 Sample Midpoint(m) : 492.51 Sect/Pc #: 6/PCE 1C
ROCK = PLAG-OL-CPX MODERATELY PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: OPHITIC,HYALOOPHITIC,MODERATELY PHYRIC,
GROUNDMASS XTL SIZE-HETEROGENEOUS;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): .5 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 5%)
Size(mm): 4 Morphology: EUHEDRAL
CLINOPYROXENE ( 2%)
Size(mm): .5 Morphology: EUHEDRAL
Groundmass - OLIVINE ( 5-10%)
Size(mm): .02 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 30%)
Size(mm): .1 Morphology: EUHEDRAL,PRISMATIC
CLINOPYROXENE ( 40%)
Size(mm): .03 Morphology: EUHEDRAL,ANHEDRAL,QUENCHED
MAGNETITE ( <5%)
Size(mm): .01
GLASS ( 5%)
ALTERED*
Vesicles -
Percent: 1
Filling: CALCITE,CLAY
Leg : 51 Top/Bottom Interval(mm): 800/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 493.80 Rock Type: IGNEOUS
Core: 43 Sample Midpoint(m) : 494.60 Sect/Pc #: 1/PCE 3A
ROCK = PLAG-OL-CPX MODERATELY PHYRIC BASALT
SLIGHTLY ALTERED,PILLOW BASALT;
Texture: PORPHYRITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 2 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 3%)
Size(mm): 2 Morphology: EUHEDRAL
CLINOPYROXENE ( 1%)
Size(mm): 2
PARTIALLY RESORBED*
Groundmass - PLAGIOCLASE ( 15%)
Size(mm): .5 Morphology: QUENCHED
CLINOPYROXENE ( 20%)
Size(mm): .3
MAGNETITE ( <3%)
Morphology: DENDRITIC
GLASS ( 50%)
VARIOLITIC*
Alteration - CLAY MINERALS
Replacing: OL
Vesicles -
Size(mm): <.05
Percent: <1
Filling: CALCITE
Leg : 51 Top/Bottom Interval(mm): 50/ 0 Describer: Rusinov, V.
Hole: 417D Top of Core Depth(m) : 493.80 Rock Type: IGNEOUS
Core: 43 Sample Midpoint(m) : 495.35 Sect/Pc #: 2/PCE 1A
ROCK = PLAG-OL-CPX PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: PHYRIC,MICROLITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): .2-.4 Morphology: PRISMATIC
ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): .2-1 Morphology: TABULAR
APPROX COMP AN68-63,ZONED,FRESH;
CLINOPYROXENE ( 5%)
Size(mm): .3-2 Morphology: PRISMATIC,IRREGUALR
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): .1-.3 Morphology: QUENCHED
APPROX COMP AN53;
CLINOPYROXENE ( 50%)
Size(mm): .1
MAGNETITE ( 6%)
Size(mm): .02-.04 Morphology: EUHEDRAL
Alteration - CALCITE ( 3%)
Location: VESICLES IN Replacing: OL
Location: GROUNDMASS
CLAY MINERALS ( <1%)
Location: PSEUDOMORPHS Replacing: OL
SERPENTINITE ( <1%)
Location: PSEUDOMORPHS Replacing: OL
Vesicles -
Size(mm): .1-.05
Percent: <1
Filling: CALCITE,CLAY
Shape: ROUND
Leg : 51 Top/Bottom Interval(mm): 500/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 493.80 Rock Type: IGNEOUS
Core: 43 Sample Midpoint(m) : 497.30 Sect/Pc #: 3/PCE 1D
ROCK = PLAG-OL-CPX PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: PORPHYRITIC;
Where sampled: NEXT TO GLASSY MARGIN
MISLABELLED-SAMPLE FROM INSIDE 6M DOLERITE*
Phenocrysts- OLIVINE ( 10%)
Size(mm): 3 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 25%)
Size(mm): 4 Morphology: EUHEDRAL
CLINOPYROXENE ( 5%)
Size(mm): 4 Morphology: SUBHEDRAL
Groundmass - OLIVINE ( 5%)
Size(mm): .1
ALTERED;
PLAGIOCLASE ( 20%)
Size(mm): .4 Morphology: PRISMATIC,QUENCHED
CLINOPYROXENE ( 30%)
Size(mm): .2 Morphology: QUENCHED
MAGNETITE ( <5%)
Morphology: DENDRITIC
GLASS ( 20%)
Alteration - CLAY MINERALS
Replacing: OL
Vesicles -
Size(mm): .3
Percent: <1
Filling: CALCITE
Leg : 51 Top/Bottom Interval(mm): 1300/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 493.80 Rock Type: IGNEOUS
Core: 43 Sample Midpoint(m) : 499.60 Sect/Pc #: 4/PCE 1J
ROCK = PLAG-OL-CPX PHYRIC BASALT
SLIGHTLY ALTERED,MASSIVE BASALT;
Texture: OPHITIC,PORPHYRITIC;
Where sampled: INTERIOR OF MASSIVE BASALT*
Phenocrysts- OLIVINE ( 5%)
Size(mm): .5 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): .5-3 Morphology: EUHEDRAL
CLINOPYROXENE ( 5%)
Size(mm): .5 Morphology: ANHEDRAL
Groundmass - OLIVINE ( 15%)
Size(mm): .2 Morphology: EUHEDRAL-SUBHEDRAL
PLAGIOCLASE ( 35%)
Size(mm): .5 Morphology: PRISMATIC
CLINOPYROXENE ( 25%)
Size(mm): .2 Morphology: ANHEDRAL
MAGNETITE ( <2%)
Size(mm): .03 Morphology: DENDRITIC
Alteration - CLAY MINERALS
Replacing: OL
Vesicles -
Size(mm): .02
Percent: 1
Filling: CALCITE
Leg : 51 Top/Bottom Interval(mm): 940/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 493.80 Rock Type: IGNEOUS
Core: 43 Sample Midpoint(m) : 500.74 Sect/Pc #: 5/PCE 1H
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED,MASSIVE BASALT;
Texture: OPHITIC,PORPHYRITIC;
Where sampled: INTERIOR OF MASSIVE BASALT*
Phenocrysts- OLIVINE ( 5%)
Size(mm): .3-2 Morphology: EUHEDRAL
COMPLETELY ALTERED;
PLAGIOCLASE ( 10%)
Size(mm): .5-3 Morphology: EUHEDRAL
CLINOPYROXENE ( 2%)
Size(mm): .5 Morphology: ANHEDRAL
Groundmass - OLIVINE ( 15%)
Size(mm): .1 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE (25-30%)
Size(mm): .5 Morphology: PRISMATIC
CLINOPYROXENE ( 35%)
Size(mm): .3 Morphology: ANHEDRAL
MAGNETITE ( <5%)
Size(mm): .02 Morphology: DENDRITIC
Alteration - CALCITE
Location: VEIN,PHENOS, Replacing: OL
Location: GROUNDMASS
CLAY MINERALS
Replacing: OL
Vesicles -
Percent: <1
Leg : 51 Top/Bottom Interval(mm): 130/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 493.80 Rock Type: IGNEOUS
Core: 43 Sample Midpoint(m) : 501.43 Sect/Pc #: 6/PCE 1
ROCK = PLAG-OL-CPX PHYRIC BASALT
SLIGHTLY ALTERED,PILLOW BASALT;
Texture: PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): .2-1 Morphology: EUHEDRAL
PLAGIOCLASE ( 10%)
Size(mm): .5-3 Morphology: EUHEDRAL,PRISMATIC
Morphology: MICROPHENOCRYSTS
CLINOPYROXENE ( 3%)
Size(mm): .2-.5 Morphology: ANHEDRAL
SECTOR ZONING*
Groundmass - OLIVINE ( <5%)
Size(mm): .05 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 10%)
Size(mm): .3 Morphology: QUENCHED,NEEDLES
CLINOPYROXENE ( 20%)
Size(mm): .05 Morphology: QUENCHED
GLASS ( 50%)
DEVITRIFIED,VARIOLITIC*
Alteration - CALCITE
Location: VEIN, Replacing: OL
Location: GROUNDMASS
CLAY MINERALS
Replacing: OL
Vesicles -
Size(mm): .4
Filling: CLAY.MIN
Shape: ROUND
Leg : 51 Top/Bottom Interval(mm): 300/ 0 Describer: Rusinov, V.
Hole: 417D Top of Core Depth(m) : 502.90 Rock Type: IGNEOUS
Core: 44 Sample Midpoint(m) : 503.20 Sect/Pc #: 1/PCE 2C
ROCK = PLAG-OL-PYX PHYRIC BASALT
MOD ALTERED,TRACES OF HYALOCLASTIC BRECCIA;
Texture: PHYRIC,MICROLITIC;
Where sampled: PILLOW INTERIOR;
Phenocrysts- OLIVINE ( 1%)
Size(mm): .3-.6 Morphology: PRISMATIC
ALTERED;
PLAGIOCLASE ( 10%)
Size(mm): .6-5 Morphology: TABULAR
APPROX COMP AN80 IN CORE,AN70-72 IN MARGINS,
PARTLY SERICITIZED;
CLINOPYROXENE ( 2%)
Size(mm): .2-.5 Morphology: PRISMATIC,IRREGULAR
ALMOST FRESH*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): .1-.3 Morphology: QUENCHED
APPROX COMP AN65-70;
CLINOPYROXENE ( 60%)
Size(mm): .1-.2 Morphology: QUENCHED
MAGNETITE ( 5%)
Size(mm): .02-.04 Morphology: QUENCHED
Alteration - CARBONATE ( 4%)
Location: VESICLES, Replacing: PLAG,AUGITE,OL
Location: GROUNDMASS
PSEUDOMORPHS AFTER PLAG,AUGITE AND OL;
COMBINATION ( 3%)
Location: VESICLES Replacing: PLAG,AUGITE,OL
INCLUDES CLAY.MIN+SERICITE,
PSEUDOMORPHS AFTER PLAG,AUGITE AND OL*
Vesicles -
Size(mm): .05-.8
Percent: 1
Filling: CALCITE,CLAY
Shape: ROUND
Leg : 51 Top/Bottom Interval(mm): 800/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 502.90 Rock Type: IGNEOUS
Core: 44 Sample Midpoint(m) : 506.70 Sect/Pc #: 3/PCE 3
ROCK = PLAG-OL-CPX PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): .5 Morphology: EUHEDRAL
PLAGIOCLASE ( 10%)
Size(mm): .5 Morphology: EUHEDRAL
CLINOPYROXENE ( 3%)
Size(mm): .5 Morphology: SUBHEDRAL
IN AGGREGATES WITH PLAG*
Groundmass - OLIVINE ( 10%)
Morphology: EUHEDRAL
PLAGIOCLASE ( 20%)
Size(mm): .2 Morphology: EUHEDRAL,QUENCHED
CLINOPYROXENE ( 10%)
Morphology: QUENCHED
MAGNETITE ( 5%)
Size(mm): .02 Morphology: DENDRITIC
GLASS ( 40%)
DEVITRIFIED,VARIOLITIC*
Alteration - CLAY MINERALS
Replacing: OL
Vesicles -
Percent: <.2
Filling: OL
Leg : 51 Top/Bottom Interval(mm): 50/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 502.90 Rock Type: IGNEOUS
Core: 44 Sample Midpoint(m) : 507.45 Sect/Pc #: 4/PCE 1
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH ALTERED CHILLED
MARGINS;
Texture: PORPHYRITIC,LOCAL MICROPHENOCRYST AGGREGATES
OF PLAG+CPX OR PLAG+OL;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): .5 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 20%)
Size(mm): 4 Morphology: EUHEDRAL
CLINOPYROXENE ( 5-7%)
Size(mm): 3 Morphology: SUBHEDRAL
Groundmass - OLIVINE ( 20%)
Size(mm): .02 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 30%)
Size(mm): .05 Morphology: EUHEDRAL,PRISMATI,QUENCHED
CLINOPYROXENE ( 20%)
Size(mm): .02 Morphology: QUENCHED
MAGNETITE ( <5%)
Size(mm): .02 Morphology: DENDRITIC
LOCALLY TINY NETWORK*
Alteration - SERICITE
Location: PLAG CORES Replacing: PLAG,OL
CLAY MINERALS
Replacing: PLAG,OL
Vesicles -
Size(mm): .2
Percent: <1
Filling: CALCITE
Leg : 51 Top/Bottom Interval(mm): 360/ 0 Describer: Rusinov, V.
Hole: 417D Top of Core Depth(m) : 512.00 Rock Type: IGNEOUS
Core: 45 Sample Midpoint(m) : 512.36 Sect/Pc #: 1/PCE 2A
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH ALTERED BRECCIATED
MARGINS;
Texture: PHYRIC,MICROLITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): .2-1 Morphology: PRISMATIC
ALTERED;
PLAGIOCLASE ( 25%)
Size(mm): .1-1 Morphology: TABULAR
APPROX COMP AN40-45,PARTLY ALTERED;
CLINOPYROXENE ( 3%)
Size(mm): .3-.6 Morphology: IRREGULAR,PRISMATIC
PARTLY ALTERED*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): .05-.1 Morphology: QUENCHED
APPROX COMP AN36;
CLINOPYROXENE ( 43%)
Size(mm): .1 Morphology: QUENCHED
MAGNETITE ( 5%)
Size(mm): .02-.04
Alteration - CARBONATE ( 2%)
Location: VESICLES Replacing: AUGITE,PLAG,OL
PSEUDOMORPHS AFTER AUGITE,PLAG AND OL;
COMBINATION ( 1%)
Replacing: AUGITE,PLAG,OL
INCLUDES CLAYS+SERICITE;
PSEUDOMORPHS AFTER AUGITE,PLAG AND OL*
Vesicles -
Percent: 1
Leg : 51 Top/Bottom Interval(mm): 170/ 0 Describer: Ui, Tadahide
Hole: 417D Top of Core Depth(m) : 512.00 Rock Type: IGNEOUS
Core: 45 Sample Midpoint(m) : 513.67 Sect/Pc #: 2/PCE 2A
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH BRECCIATED MARGINS;
Texture: PORPHYRITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 2%)
Size(mm): .5 Morphology: EUHEDRAL
COMPLETELY ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): 2 Morphology: EUHEDRAL
PARTLY ALTERED;
CLINOPYROXENE ( 5%)
Size(mm): .5
PARTIALLY RESORBED,SECTOR ZONING*
Groundmass - PLAGIOCLASE ( 10%)
Size(mm): .3 Morphology: QUENCHED
CLINOPYROXENE ( 5%)
Size(mm): .1 Morphology: QUENCHED
MAGNETITE ( <5%)
Morphology: DENDRITIC,QUENCHED
GLASS ( 70%)
DEVITRIFIED,VARIOLITIC*
Alteration - CALCITE
Replacing: PLAG
PLAG PARTLY ALTERED;
SERICITE
Replacing: PLAG
Vesicles -
Percent: 5
Filling: CALCITE
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