Leg : 52 Top/Bottom Interval(mm): 220/ 0 Describer: Swanson, D.
Hole: 417D Top of Core Depth(m) : 532.00 Rock Type: IGNEOUS
Core: 48 Sample Midpoint(m) : 538.22 Sect/Pc #: 5/PCE 3A
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED;
Texture: HIGHLY GLOMEROPORPHYRITIC,TACHYLITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): .2-.6 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 24%)
Size(mm): .4-1.2 Morphology: EUHEDRAL-SUBHEDRAL
SUBOPHITIC TO OPHITIC CLOTS DOMINANT;
CLINOPYROXENE ( 24%)
Size(mm): .3-.8 Morphology: SUBHEDRAL
SUBOPHITIC-OPHITIC CLOTS DOMINANT*
Groundmass - OLIVINE ( 2%)
Size(mm): .05-.1 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): .01-.4 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( 15%)
Size(mm): .005-.3 Morphology: EUHEDRAL-SUBHEDRAL
MAGNETITE ( 5%)
Size(mm): .005-.01 Morphology: IRREGULAR,RODS
TYPICAL MORPHOLOGY FOR TACHYLITE;
GLASS ( 5-10%)
TACHYLITIC*
Alteration - CALCITE ( 2%)
Location: VESICLES Replacing: OL,GLASS,PLAG
CLAY MINERALS ( 2%)
Location: VESICLES Replacing: OL,GLASS,PLAG
ZEOLITE ( <1%)
Location: VESICLES
Vesicles -
Size(mm): 1
Percent: 2
Location: RANDON
Filling: CALCITE,
Shape: ROUND
Filling: SMECTITE,
Filling: ZEOLITES
IDENTITY UNCERTAIN FOR ZEOLITES,SHRINKAGE VESICLES
COMMON*
Leg : 52 Top/Bottom Interval(mm): 300/ 0 Describer: Ricou, L.
Hole: 417D Top of Core Depth(m) : 532.00 Rock Type: IGNEOUS
Core: 48 Sample Midpoint(m) : 539.80 Sect/Pc #: 6/PCE 2A
ROCK = PLAG-CPX-OL PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: HIGHLY PHYRIC,SUBOPHITIC;
Where sampled: FLOW INTERIOR AND CALCITE VEIN*
Phenocrysts- OLIVINE ( 5%)
Size(mm): .5-2 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 25%)
Size(mm): 1-3 Morphology: EUHEDRAL,TABULAR,LATHS
CONCENTRIC ZONING;
CLINOPYROXENE ( 20%)
Size(mm): .5-1 Morphology: HETEROMORPHIC
Groundmass - PLAGIOCLASE ( 20%)
Morphology: LATHS,SERIATE
CLINOPYROXENE ( 20%)
Morphology: HETEROMORPHIC,SERIATE
MAGNETITE ( 5-10%)
Morphology: EUHEDRAL
GLASS ( 5%)
ALTERED TO GREEN AND BROWN CLAY*
Alteration - CLAY MINERALS ( 5%)
Location: GROUNDMASS Replacing: OL,GLASS
CARBONATE
Location: VEIN (5MM)
SPHERO-RADIATE ON WALL*
Leg : 52 Top/Bottom Interval(mm): 540/ 0 Describer: Bryan, W.
Hole: 417D Top of Core Depth(m) : 532.00 Rock Type: IGNEOUS
Core: 48 Sample Midpoint(m) : 541.54 Sect/Pc #: 7/PCE 4
ROCK = PLAG-OL-CPX MODERATELY PHYRIC BASALT
MOD ALTERED WITH TRACES OF BRECCIA;
Texture: GLOMEROPORPHYRITIC,APHANITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE
Size(mm): .2-.5
CARBONATE PSEUDOMORPHS;
PLAGIOCLASE
Size(mm): .5-4
CLINOPYROXENE
Size(mm): .2-3
Groundmass - COMBINATION
Morphology: CRYPTOCRYSTALLINE
INCLUDES PLAG+CPX+MAGN,PLAG MICROLITES IN
CRYPTOCRYSTALLINE MATRIX,
SECTION CONTAINS A 1.5 CM WIDE DIKE WITH PLAG
MICROLITES*
Alteration - CALCITE ( 5%)
Replacing: OL
ZEOLITE ( <1%)
Location: VESICLE
Vesicles -
Size(mm): 2
Percent: <1
Filling: ZEOLITES
Shape: ROUND
ALSO UNIDENTIFIED SILICATE NEAR RIM,ONE VESICLE*
Leg : 52 Top/Bottom Interval(mm): 850/ 0 Describer: Ricou, L.
Hole: 417D Top of Core Depth(m) : 532.00 Rock Type: IGNEOUS
Core: 48 Sample Midpoint(m) : 541.85 Sect/Pc #: 7/PCE 6B
ROCK = PLAG-OL-CPX PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: PHYRIC,INTERSERTAL,QUENCHED;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): <1 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): 1-3 Morphology: TABULAR,LATHS
ZONED;
CLINOPYROXENE ( 10%)
Morphology: HETEROMORPHIC
FORMS GLOMEROCRYSTS WITH PLAG*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): .5 Morphology: LATHS
CLINOPYROXENE ( 30%)
Size(mm): .5 Morphology: PLUMOSE,SKELETAL
MAGNETITE ( 20%)
Size(mm): .5 Morphology: ARROWHEAD
GLASS ( TR%)
ALTERED*
Alteration - CLAY MINERALS
Replacing: GLASS,OL PHENOS
Vesicles -
Percent: 2
Filling: DEVITRIFIED
Shape: ROUND
Filling: GLASS
VESICLES HAVE CLAY LINING,TWO VESICLES*
Leg : 52 Top/Bottom Interval(mm): 851/ 0 Describer: Emmermann, R.
Hole: 417D Top of Core Depth(m) : 532.00 Rock Type: IGNEOUS
Core: 48 Sample Midpoint(m) : 541.85 Sect/Pc #: 7/PCE 6B
ROCK = PLAG-OL-CPX PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: HIGHLY PHYRIC,INTERSERTAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): .2-.8 Morphology: EUHEDRAL
COMPLETELY ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): .2-2 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( 10%)
Size(mm): .2-.8 Morphology: ANHEDRAL
Groundmass - MICROCRYST GROUNDMASS ( 70%)
Morphology: SKELETAL (PARTLY)
INCLUDES PLAG+CPX+MAGN,IRREGULAR PATCHES OF FINE-
GRAINED (<0.5MM) INTERSERTAL INTERGROWTH OF CPX+MT
+PLAG,ESTIMATION OF VOLUME UNREALISTIC*
Alteration - CALCITE
Location: VEIN,PHENOS Replacing: OL
CLAY MINERALS ( 5%)
Location: VEIN,PHENOS Replacing: OL
Vesicles -
Size(mm): 1-2
Percent: <1
Leg : 52 Top/Bottom Interval(mm): 770/ 0 Describer: Robinson, P.
Hole: 417D Top of Core Depth(m) : 539.00 Rock Type: IGNEOUS
Core: 49 Sample Midpoint(m) : 539.77 Sect/Pc #: 1/PCE 6B
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED;
Texture: OPHI MOTTLED;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): .5 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 10%)
Size(mm): .5-4 Morphology: LATHS
CLINOPYROXENE ( 6%)
Size(mm): .5-1 Morphology: SUB-OPHITIC
Groundmass - COMBINATION
INCLUDES OL+PLAG+CPX+MAGN+GLASS*
Alteration - CALCITE
Location: GROUNDMASS, Replacing: OL,PLAG
Location: VESICLES
CLAY MINERALS
Location: GROUNDMASS, Replacing: OL,PLAG
Location: VESICLES
PYRITE
Location: NARROW VEINS
FERROUS OXIDE
Location: VEINS,PHENOS Replacing: OL
Vesicles -
Size(mm): .1
Percent: <1
Filling: SMECTITE,
Shape: ROUND
Filling: CALCITE
Leg : 52 Top/Bottom Interval(mm): 80/ 0 Describer: Pertsev, N.
Hole: 417D Top of Core Depth(m) : 539.00 Rock Type: IGNEOUS
Core: 49 Sample Midpoint(m) : 540.58 Sect/Pc #: 2/PCE 1
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED;
Texture: INTERGRANULAR,QUENCHED,GLOMEROPHYRIC AGGREGATES
OF PLAG + CPX;
Where sampled: FLOW INTERIOR TO FLOW MARGIN*
Phenocrysts- OLIVINE ( 3%)
Size(mm): <.7 Morphology: EUHEDRAL
COMPLETELY ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): <2 Morphology: LATHS
NORMAL ZONING;
CLINOPYROXENE ( 7%)
Size(mm): <1 Morphology: ANHEDRAL,MOSAIC
Groundmass - OLIVINE ( 10%)
Morphology: INTERGRANULAR,QUENCHED
ALTERED;
PLAGIOCLASE ( 13%)
Morphology: INTERGRANULAR,QUENCHED
FRESH;
CLINOPYROXENE ( 35%)
Morphology: EUHEDRAL
MAGNETITE ( 2%)
Size(mm): .005 Morphology: ANHEDRAL
PYRITE ( 7%)
Size(mm): .05 Morphology: EUHEDRAL
IN VEINS ALSO*
Alteration - CALCITE ( 2%)
Location: VEINS IN Replacing: OL PHENOS
Location: GROUNDMASS
SMECTITE ( 13%)
Replacing: OL,PLAG
Vesicles -
Size(mm): <1
Percent: 2
Filling: CALCITE,
Shape: ROUND
Filling: ZEOLITES,
Filling: SMECTITE
Leg : 52 Top/Bottom Interval(mm): 1060/ 0 Describer: Pertsev, N.
Hole: 417D Top of Core Depth(m) : 539.00 Rock Type: IGNEOUS
Core: 49 Sample Midpoint(m) : 541.56 Sect/Pc #: 2/PCE 5C
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED;
Texture: INTERSERTAL,PORPHYRITIC;
Where sampled: GLASSY MARGIN*
Phenocrysts- OLIVINE ( 2%)
Size(mm): <1 Morphology: EUHEDRAL
COMPLETELY ALTERED;
PLAGIOCLASE ( 9%)
Size(mm): TO 2 Morphology: LATHS
ZONED;
CLINOPYROXENE ( 4%)
Size(mm): <1 Morphology: ANHEDRAL
Groundmass - PLAGIOCLASE ( 15%)
Morphology: MICROLITES
CLINOPYROXENE ( 15%)
Morphology: SUBHEDRAL
MAGNETITE ( 2%)
Size(mm): .005 Morphology: ANHEDRAL
GLASS ( 45%)
DEVITRIFIED,ALTERED;
PYRITE ( 8%)
Size(mm): .05 Morphology: SUBHEDRAL,ELONGATE
IN VEINS ALSO*
Alteration - SMECTITE ( 3%)
Location: VEINS,PHENOS, Replacing: OL,PLAG,GLASS
Location: GROUNDMASS
CARBONATE
Location: VEINS
ZEOLITE
Location: CAVITIES
FERROUS HYDROX MINS ( 1%)
Replacing: OL
CALCITE IS MINOR*
Leg : 52 Top/Bottom Interval(mm): 1150/ 0 Describer: Swanson, D.
Hole: 417D Top of Core Depth(m) : 539.00 Rock Type: IGNEOUS
Core: 49 Sample Midpoint(m) : 541.65 Sect/Pc #: 2/PCE 6
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED;
Texture: PHYRIC,INTERSERTAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): .1-.8 Morphology: EUHEDRAL
COMPLETELY ALTERED;
PLAGIOCLASE ( 10%)
Size(mm): .2-2 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( 2%)
Size(mm): .1-.5 Morphology: ANHEDRAL-SUBHEDRAL
Groundmass - MICROCRYST GROUNDMASS ( 85%)
Size(mm): <.05 Morphology: INTERSERTAL
INCLUDES GLASS+PLAG+CPX+OL(?),GLASS IS ALTERED*
Alteration - CALCITE ( <5%)
Location: VEIN,PHENOS Replacing: OL,GLASS
IDENTITY UNCERTAIN FOR GLASS;
CLAY MINERALS ( 10%)
Location: ONE VEIN Replacing: OL,GLASS,PLAG,
Replacing: CPX
MAY BE UNDERESTIMATED;
ZEOLITE ( <1%)
Location: VEIN CENTER
Leg : 52 Top/Bottom Interval(mm): 210/ 0 Describer: Byerly, G.
Hole: 417D Top of Core Depth(m) : 539.00 Rock Type: IGNEOUS
Core: 49 Sample Midpoint(m) : 542.21 Sect/Pc #: 3/PCE 2
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED;
Texture: INTERGRANULAR,QUENCHED,GLOMEROPORPHYRITIC;
Where sampled: FLOW INTERIOR TO FLOW MARGIN*
Phenocrysts- OLIVINE ( <5%)
Size(mm): <1.5 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): <3 Morphology: LATHS
WITH NORMAL AND SECTOR ZONING;
CLINOPYROXENE ( 5%)
Size(mm): <1.5 Morphology: EUHEDRAL-GRANULAR
Groundmass - OLIVINE ( 10%)
Size(mm): SERIATE Morphology: INTERGRANULAR,QUENCHED
ALTERED,SERIATE;
PLAGIOCLASE ( 25%)
Size(mm): SERIATE Morphology: INTERGRANULAR,QUENCHED
FRESH,SERIATE;
CLINOPYROXENE ( 30%)
Size(mm): SERIATE Morphology: INTERGRANULAR,QUENCHED
FRESH,SERIATE;
MAGNETITE ( 5%)
Size(mm): <.05 Morphology: EUHEDRAL
GLASS ( 5%)
DEVITRIFIED,ALTERED*
Alteration - CALCITE ( 2%)
Replacing: OL PHENOS
CLAY MINERALS ( 3%)
Location: VEINS,PHENOS Replacing: OL PHENOS
Leg : 52 Top/Bottom Interval(mm): 1170/ 0 Describer: Emmermann, R.
Hole: 417D Top of Core Depth(m) : 545.00 Rock Type: IGNEOUS
Core: 50 Sample Midpoint(m) : 546.17 Sect/Pc #: 1/PCE 9
ROCK = PLAG-CPX-OL PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: GLOMEROPORPHYRITIC,INTERSERTAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 6%)
Size(mm): <2 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 10%)
Size(mm): <3 Morphology: EUHEDRAL-SUBHEDRAL,CLOTS
CLINOPYROXENE ( 4%)
Size(mm): <1.5 Morphology: ANHEDRAL
IN CLUSTERS WITH PLAG*
Groundmass - OLIVINE ( 5%)
PLAGIOCLASE ( 30%)
Morphology: SWALLOWTAIL
PLUMOSE INTERGROWTHS OF CPX AND PLAG;
CLINOPYROXENE ( 30%)
Morphology: SKELETAL,
MAGNETITE ( 15%)
Morphology: SUBHEDRAL,ARROWHEAD
Alteration - CALCITE
Replacing: OL
CLAY MINERALS
Replacing: OL
Vesicles -
Percent: <1
Leg : 52 Top/Bottom Interval(mm): 890/ 0 Describer: Emmermann, R.
Hole: 417D Top of Core Depth(m) : 545.00 Rock Type: IGNEOUS
Core: 50 Sample Midpoint(m) : 547.39 Sect/Pc #: 2/PCE 3A
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED;
Texture: GLOMEROPORPHYRITIC,INTERSERTAL-SUBOPHITIC;
Phenocrysts- OLIVINE ( 5%)
Size(mm): <2 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 20%)
Size(mm): 4 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( 15%)
Size(mm): <1.5 Morphology: ANHEDRAL
COMMONLY IN SUBOPHITIC CLOTS*
Groundmass - OLIVINE ( 5%)
SERIATE;
PLAGIOCLASE ( 25%)
Morphology: LATHS,SWALLOWTAIL
SERIATE;
Morphology: AGGREGATES
CLINOPYROXENE ( 20%)
Morphology: ANHEDRAL
SERIATE;
MAGNETITE ( 5%)
Morphology: EUHEDRAL
GLASS ( 5%)
Alteration - CALCITE
Location: VESICLES Replacing: OL
CLAY MINERALS
Location: VESICLES Replacing: OL
Vesicles -
Size(mm): <2
Percent: <1
Filling: CALCITE,
Filling: SMECTITE
Leg : 52 Top/Bottom Interval(mm): 130/ 0 Describer: Byerly, G.
Hole: 417D Top of Core Depth(m) : 548.50 Rock Type: IGNEOUS
Core: 51 Sample Midpoint(m) : 548.63 Sect/Pc #: CC/PCE 1
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED;
Texture: SUBOPHITIC-INTERSERTAL,GLOMEROPORPHYRITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): <1.5 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 25%)
Size(mm): <2 Morphology: EUHEDRAL,LATHS
CLINOPYROXENE ( 20%)
Size(mm): <1.5 Morphology: SUBOPHITIC
IN SUBOPHITIC CLOTS*
Groundmass - OLIVINE ( 5%)
SERIATE;
PLAGIOCLASE ( 15%)
SERIATE;
CLINOPYROXENE ( 20%)
SERIATE;
MAGNETITE ( 5%)
Size(mm): <.5 Morphology: EUHEDRAL
GLASS ( 5%)
ALTERED*
Alteration - CALCITE ( 1%)
Replacing: OL
SMECTITE ( 6%)
Location: VEINS,PHENOS, Replacing: OL,GLASS
Location: GROUNDMASS
ZEOLITE ( <1%)
Replacing: OL
FERROUS HYDROX MINS ( 1%)
REDS AND YELLOWS*
Leg : 52 Top/Bottom Interval(mm): 650/ 0 Describer: Ricou, L.
Hole: 417D Top of Core Depth(m) : 558.00 Rock Type: IGNEOUS
Core: 52 Sample Midpoint(m) : 558.65 Sect/Pc #: 1/PCE 1E
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED;
Texture: PORPHYRITIC,OPHITIC,5% CPX AND PLAG-MEGACRYSTS;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 10%)
Size(mm): 1 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 25%)
Size(mm): 1-3.5 Morphology: LATHS
CLINOPYROXENE ( 25%)
Size(mm): 1-2.5 Morphology: POIKILITIC
Groundmass - PLAGIOCLASE ( 15%)
Size(mm): .5 Morphology: LATHS
MAGNETITE ( 10%)
Morphology: EUHEDRAL
GLASS ( 25%)
COMPLETELY ALTERED*
Alteration - SMECTITE
Replacing: GLASS
CLAY MINERALS
Replacing: OL,CPX
Leg : 52 Top/Bottom Interval(mm): 651/ 0 Describer: Byerly, G.
Hole: 417D Top of Core Depth(m) : 558.00 Rock Type: IGNEOUS
Core: 52 Sample Midpoint(m) : 558.65 Sect/Pc #: 1/PCE 1E
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED;
Texture: GLOMEROPORPHYRITIC,QUENCHED,INTERSERTAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): <4 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 30%)
Morphology: LATHS
WITH NORMAL AND COMPLEX ZONING;
CLINOPYROXENE ( 30%)
Size(mm): <4
SUBOPHITIC CLOTS,NORMAL AND SECTOR ZONING*
Groundmass - PLAGIOCLASE ( 10%)
Morphology: QUENCHED
SERIATE;
CLINOPYROXENE ( 5%)
Morphology: QUENCHED
SERIATE;
MAGNETITE ( 5%)
Size(mm): <.2 Morphology: SKELETAL
GLASS ( 15%)
ALTERED*
Alteration - CALCITE ( 1%)
Location: VEINS,PHENOS, Replacing: OL
Location: GROUNDMASS
SMECTITE ( 20%)
Location: VEINS,PHENOS, Replacing: OL,GLASS
Location: GROUNDMASS
SULFIDES ( 0%)
Leg : 52 Top/Bottom Interval(mm): 80/ 0 Describer: Swanson, D.
Hole: 417D Top of Core Depth(m) : 558.00 Rock Type: IGNEOUS
Core: 52 Sample Midpoint(m) : 562.58 Sect/Pc #: 4/PCE 1A
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED;
Texture: PHYRIC,INTERGRANULAR;
Where sampled: NEXT TO GLASSY MARGIN
WITHIN 12-20CM*
Phenocrysts- OLIVINE ( 3%)
Size(mm): .3-3 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 10%)
Size(mm): 1.5-5 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( 2%)
Size(mm): .1-.6 Morphology: SUBHEDRAL
OPHITIC-SUBOPHITIC CLOTS WITH PLAGIOCLASE*
Groundmass - OLIVINE ( 2%)
Size(mm): .02 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 35%)
Size(mm): .02-.03 Morphology: SUBHEDRAL
CLINOPYROXENE ( 35%)
Size(mm): .02-.03 Morphology: ANHEDRAL
MAGNETITE ( 3%)
Size(mm): .02-.03 Morphology: DEDRITIC,ISOMETRIC
GLASS ( 10%)
Alteration - CALCITE ( 2%)
Location: VEINS,PHENOS, Replacing: OL,GLASS
Location: GROUNDMASS
CLAY MINERALS ( 5%)
Location: VEINS,PHENOS, Replacing: OL,GLASS
Location: GROUNDMASS
Vesicles -
Size(mm): 1
Percent: <1
Filling: CALCITE,
Shape: ROUND
Filling: SMECTITE
Leg : 52 Top/Bottom Interval(mm): 740/ 0 Describer: Robinson, P.
Hole: 417D Top of Core Depth(m) : 558.00 Rock Type: IGNEOUS
Core: 52 Sample Midpoint(m) : 564.74 Sect/Pc #: 5/PCE 6
ROCK = PLAG-CPX-OL PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: PORPHYRITIC,INTERSERTAL*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): .2-.5
ALTERED;
PLAGIOCLASE ( 9%)
Size(mm): .3-1.5 Morphology: LATHS,EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( 3-4%)
Size(mm): 5
INTERGROWTHS IN PLAG*
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): <.1 Morphology: ACICULAR
CLINOPYROXENE ( 35%)
Size(mm): <.05 Morphology: GRANULAR
MAGNETITE ( 10%)
GLASS ( 5%)
DEVITRIFIED*
Alteration - CLAY MINERALS
Location: GROUNDMASS Replacing: GLASS,OL
PYRITE
Location: VEINS
Vesicles -
Size(mm): .1-.3
Percent: <1
Location: RANDOM
Filling: CALCITE
Shape: SPHERICAL
Leg : 52 Top/Bottom Interval(mm): 1260/ 0 Describer: Robinson, P.
Hole: 417D Top of Core Depth(m) : 558.00 Rock Type: IGNEOUS
Core: 52 Sample Midpoint(m) : 565.26 Sect/Pc #: 5/PCE 11
ROCK = PLAG-CPX-OL MODERATELY PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: HYALOOPHITIC;
Where sampled: GLASSY MARGIN*
Phenocrysts- OLIVINE ( <1%)
PLAGIOCLASE ( 5%)
Size(mm): .1-1.5 Morphology: LATHS
CORES REPLACED BY SMECTITE;
CLINOPYROXENE ( <1%)
Groundmass - GLASS ( 95%)
ALTERED*
Alteration - CALCITE
Replacing: GLASS
CLAY MINERALS
Replacing: GLASS
SMECTITE
Replacing: PLAG
Leg : 52 Top/Bottom Interval(mm): 1110/ 0 Describer: Emmermann, R.
Hole: 417D Top of Core Depth(m) : 567.50 Rock Type: IGNEOUS
Core: 53 Sample Midpoint(m) : 568.61 Sect/Pc #: 1/PCE 5A
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH CHILLED GLASSY
MARGINS AND MINOR INTERPILLOW BRECCIA;
Texture: PHYRIC,INTERSERTAL,QUENCHED GROUNDMASS;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 2 Morphology: EUHEDRAL-SUBHEDRAL
PLAGIOCLASE ( 8%)
Size(mm): 4 Morphology: SUBHEDRAL
MANY INCLUSIONS;
CLINOPYROXENE ( 4%)
Size(mm): 2 Morphology: ANHEDRAL
Groundmass - OLIVINE ( 4%)
Morphology: QUENCHED
PLAGIOCLASE ( 25%)
Morphology: SWALLOWTAIL
CLINOPYROXENE ( 50%)
Morphology: PLUMOSE
MAGNETITE ( 5%)
Morphology: ARROWHEAD
Alteration - CALCITE
Location: VESICLES Replacing: OL
CLAY MINERALS
Location: VESICLES Replacing: OL
Vesicles -
Size(mm): TO 1
Percent: 2
Filling: SMECTITE,CARB
Leg : 52 Top/Bottom Interval(mm): 1111/ 0 Describer: Ricou, L.
Hole: 417D Top of Core Depth(m) : 567.50 Rock Type: IGNEOUS
Core: 53 Sample Midpoint(m) : 568.61 Sect/Pc #: 1/PCE 5A
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH CHILLED GLASSY
MARGINS AND MINOR INTERPILLOW BRECCIA;
Texture: PORPHYRITIC,INTERSERTAL,QUENCHED;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): .5-1 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 10%)
Size(mm): 2-5 Morphology: LATHS,TABULAR
CLINOPYROXENE ( 5%)
Size(mm): .5-1 Morphology: ANHEDRAL
1 PHENO 5MM,CLOTS WITH PLAG*
Groundmass - PLAGIOCLASE ( 25%)
Size(mm): <.5 Morphology: LATHS
CLINOPYROXENE ( 25%)
Morphology: PLUMOSE
MAGNETITE ( 20%)
Size(mm): .1 Morphology: EUHEDRAL
GLASS ( 10%)
ALTERED*
Alteration - CLAY MINERALS
Replacing: OL,GLASS
Leg : 52 Top/Bottom Interval(mm): 190/ 0 Describer: Swanson, D.
Hole: 417D Top of Core Depth(m) : 577.00 Rock Type: IGNEOUS
Core: 54 Sample Midpoint(m) : 577.19 Sect/Pc #: 1/PCE 1B
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH ALTERED CHILLED
MARGINS;
Texture: PHYRIC,VARIOLITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): .3-.4 Morphology: EUHEDRAL
SERIATE TO GROUNDMASS;
PLAGIOCLASE ( 6%)
Size(mm): .6-.8 Morphology: EUHEDRAL-SUBHEDRAL
COMMONLY CLOTTED WITH CPX;
CLINOPYROXENE ( 3%)
Size(mm): .3-.4 Morphology: SUBHEDRAL
1 ROUNDED MEGACRYST*
Groundmass - COMBINATION ( 88%)
Morphology: MICROLITIC,VARIOLITIC
PLAG AND CPX LATHS IN ALTERED GLASS*
Alteration - CLAY MINERALS ( 5%)
Replacing: OL,GLASS
CARBONATE ( <1%)
Location: VESICLES
SULFIDE ( TR%)
Location: CLAY
Vesicles -
Size(mm): .05-1
Percent: 2
Filling: CALCITE,SMEC,
Shape: ROUND
Filling: SULFIDE
Leg : 52 Top/Bottom Interval(mm): 600/ 0 Describer: Swanson, D.
Hole: 417D Top of Core Depth(m) : 577.00 Rock Type: IGNEOUS
Core: 54 Sample Midpoint(m) : 577.60 Sect/Pc #: 1/PCE 4B
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH ALTERED CHILLED
MARGINS;
Texture: PHYRIC,GLASSY;
Where sampled: GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE ( 5-10%)
Size(mm): .3-.5 Morphology: EUHEDRAL
CLINOPYROXENE ( 5%)
Size(mm): .3-1 Morphology: EUHEDRAL
OSCILLATORY ZONING*
Groundmass - GLASS (85-90%)
Alteration - CLAY MINERALS ( 5%)
Location: VEINS,BETWEEN
Location: PILLOWS
Leg : 52 Top/Bottom Interval(mm): 650/ 0 Describer: Robinson, P.
Hole: 417D Top of Core Depth(m) : 577.00 Rock Type: IGNEOUS
Core: 54 Sample Midpoint(m) : 579.15 Sect/Pc #: 2/PCE 4B
ROCK = PLAG-CPX-OL PHYRIC BASALT
SLIGHTLY ALTERED,PILLOW BASALT WITH GLASSY CHILLED
MARGINS AND INTERPILLOW BRECCIA;
Texture: GLASSY,PORPHYRITIC;
Where sampled: GLASSY MARGIN*
Phenocrysts- OLIVINE ( 1%)
Size(mm): .5 Morphology: EUHEDRAL
PLAGIOCLASE ( 10%)
Size(mm): .5-1.5 Morphology: LATHS
CLINOPYROXENE ( 3%)
Size(mm): .5
INTERGROWN WITH PLAG*
Groundmass - GLASS ( 85%)
ALTERED*
Alteration - SMECTITE
Replacing: GLASS
CALCITE
Replacing: GLASS
Leg : 52 Top/Bottom Interval(mm): 420/ 0 Describer: Byerly, G.
Hole: 417D Top of Core Depth(m) : 577.00 Rock Type: IGNEOUS
Core: 54 Sample Midpoint(m) : 583.42 Sect/Pc #: 5/PCE 2B
ROCK = PLAG-CPX-OL PHYRIC BASALT
SLIGHTLY ALTERED,PILLOW BASALT;
Texture: INTERGRANULAR,PORPHYRITIC;
Phenocrysts- OLIVINE ( 3%)
Size(mm): <2 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 6%)
Size(mm): <3 Morphology: LATHS
WITH PROMINENT OSCILLATORY AND NORMAL ZONING;
CLINOPYROXENE ( 3%)
Size(mm): <2
ROUNDED "MEGACRYSTS" WITH CLEAR EXTINCTION,
GRANULAR WITH UNEVEN EXTINCTION IN
GLOMEROPHYRIC CLOTS*
Groundmass - OLIVINE ( 8%)
Morphology: EUHEDRAL
SERIATE;
PLAGIOCLASE ( 35%)
Morphology: LATHS
SERIATE;
CLINOPYROXENE ( 25%)
Morphology: FIBROUS BUNDLES
SERIATE;
MAGNETITE ( 5%)
Size(mm): <.02 Morphology: EUHEDRAL
GLASS ( 15%)
DEVITRIFIED*
Alteration - CLAY MINERALS ( 10%)
Replacing: OL
CALCITE ( <1%)
Location: THIN VEINS
SULFIDES ( <1%)
Location: VEINS
Vesicles -
Size(mm): <.2
Percent: 2
Filling: SMECTITE,
Filling: CALCITE
Leg : 52 Top/Bottom Interval(mm): 690/ 0 Describer: Emmermann, R.
Hole: 417D Top of Core Depth(m) : 605.50 Rock Type: IGNEOUS
Core: 57 Sample Midpoint(m) : 606.19 Sect/Pc #: 1/PCE 4B
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT;
Texture: SUBOPHITIC,INTERSERTAL,PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 4%)
Size(mm): 1.5 Morphology: EUHEDRAL
COMPLETELY ALTERED;
PLAGIOCLASE ( 9%)
Size(mm): 2 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( 7%)
Size(mm): 1 Morphology: ANHEDRAL,SUBOPHITIC
SUBOPHITIC WITH PLAG AND SINGLE GRAINS*
Groundmass - OLIVINE ( <1%)
PLAGIOCLASE ( 30%)
Morphology: SWALLOWTAIL LATHS
CLINOPYROXENE ( 45%)
Morphology: ANHEDRAL,PLUMOSE
MAGNETITE ( 5%)
Morphology: ARROWHEAD
Alteration - CALCITE
Location: VEINS,PHENOS Replacing: OL
CLAY MINERALS
Location: VEINS,PHENOS Replacing: OL
SULFIDES
Location: VEINLETS
Vesicles -
Percent: <1
Location: 1
Filling: CALCITE,
Filling: SMECTITE
Leg : 52 Top/Bottom Interval(mm): 1390/ 0 Describer: Robinson, P.
Hole: 417D Top of Core Depth(m) : 615.00 Rock Type: IGNEOUS
Core: 58 Sample Midpoint(m) : 620.89 Sect/Pc #: 4/PCE 12
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED;
Texture: QUENCHED,PORPHYRITIC*
Phenocrysts- OLIVINE ( 5%)
Size(mm): .2-.6 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): .0-4 Morphology: LATHS
Groundmass - OLIVINE ( 1-2%)
PLAGIOCLASE ( 30%)
Size(mm): <.3 Morphology: SKELETAL
CLINOPYROXENE ( 45%)
INCIPIENTLY CRYSTALLIZED;
MAGNETITE ( 1-2%)
Alteration - CLAY MINERALS
Location: GROUNDMASS, Replacing: OL
Location: FRACTURES
FERROUS OXIDE
Location: ALONG VEINS
Vesicles -
Size(mm): .04-.1
Percent: <1
Filling: SMECTITE
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 580/ 0 Describer: Pertsev, N.
Hole: 417D Top of Core Depth(m) : 624.00 Rock Type: UNIDENTIFIED
Core: 59 Sample Midpoint(m) : 627.58 Sect/Pc #: 3/PCE 4B
ROCK = BASALTIC BRECCIA
STRONGLY ALTERED BRECCIA COMPOSED
OF ALTERED TO LOCALLY GLASSY FRAGMENTS OF BASALT
IN A MATRIX OF DARK GREEN SMECTITE;
Texture: MIXED VARIOLITIC AND INTERSERTAL;
Where sampled: GLASSY MARGIN*
Phenocrysts- OLIVINE
Size(mm): 1 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE
Size(mm): 1.5 Morphology: EUHEDRAL
CLINOPYROXENE
Size(mm): 1 Morphology: SUBHEDRAL
Groundmass - PLAGIOCLASE ( 15%)
Size(mm): TO 1
CLINOPYROXENE ( 10%)
CLAY MINERALS ( 70%)
Alteration - CALCITE
Replacing: OL
SMECTITE
Replacing: OL
CLAY MINERALS ( 70%)
Replacing: GROUNDMASS
Leg : 52 Top/Bottom Interval(mm): 1360/ 0 Describer: Robinson, P.
Hole: 417D Top of Core Depth(m) : 624.00 Rock Type: IGNEOUS
Core: 59 Sample Midpoint(m) : 631.36 Sect/Pc #: 5/PCE 9A
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED,WITH ALTERED BRECCIA;
Texture: QUENCHED*
Phenocrysts- OLIVINE ( 3%)
Size(mm): .1-.3 Morphology: EUHEDRAL
PLAGIOCLASE ( 10%)
Size(mm): .3-1.3 Morphology: LATHS
CLINOPYROXENE ( 2%)
INTERGROWN WITH PLAG*
Groundmass - COMBINATION
INCLUDES PLAG+CPX+GLASS,GLASS IS DEVITRIFIED,
PLAG AND CPX ARE POORLY CRYSTALLIZED*
Alteration - CLAY MINERALS
Replacing: OL,PLAG,GROUNDMASS
CALCITE
Replacing: OL,PLAG
Vesicles -
Size(mm): .15
Percent: <1
Filling: SMECTITE
Leg : 52 Top/Bottom Interval(mm): 1170/ 0 Describer: Robinson, P.
Hole: 417D Top of Core Depth(m) : 624.00 Rock Type: IGNEOUS
Core: 59 Sample Midpoint(m) : 632.67 Sect/Pc #: 6/PCE 6
ROCK = PLAG-PYX-OL PHYRIC BASALT
MOD ALTERED;
Texture: QUENCHED,PORPHYRITIC*
Phenocrysts- OLIVINE ( 3%)
Size(mm): .2-.5 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 10%)
Size(mm): .3-1 Morphology: LATHS
CLINOPYROXENE ( <1%)
Size(mm): .5
SUBOPHITIC WITH PLAG*
Groundmass - PLAGIOCLASE ( 3-5%)
Size(mm): .3 Morphology: SWALLOWTAILED
GLASS ( 80%)
PARTIALLY DEVITRIFIED TO CPX*
Alteration - CALCITE ( TR%)
Replacing: OL
CLAY MINERALS
Replacing: OL
Vesicles -
Size(mm): .05
Percent: 1
Location: RANDOM
Filling: SMECTITE
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 470/ 0 Describer: Robinson, P.
Hole: 417D Top of Core Depth(m) : 633.00 Rock Type: IGNEOUS
Core: 60 Sample Midpoint(m) : 637.97 Sect/Pc #: 4/PCE 3A
ROCK = PLAG-CPX-OL MODERATELY PHYRIC BASALT
FRAGMENTS IN BASALTIC BRECCIA,LITHICS TO 2CM;
Texture: BRECCIATED;
Where sampled: BRECCIA ZONE IN PILLOW COMPLEX*
Phenocrysts- PLAGIOCLASE
CLINOPYROXENE
OLIVINE
Groundmass - PLAGIOCLASE ( 10%)
Size(mm): .3 Morphology: EQUIDIMENSIONAL
CLINOPYROXENE
ALTERED?;
OLIVINE
IDENTITY UNCERTAIN FOR OL;
GLASS
ALTERED*
Alteration - CALCITE
Location: IN CLASTS Replacing: OL,GLASS
CLAY MINERALS
Location: ALSO MATRIX Replacing: OL,GLASS
Leg : 52 Top/Bottom Interval(mm): 350/ 0 Describer: Swanson, D.
Hole: 417D Top of Core Depth(m) : 633.00 Rock Type: UNIDENTIFIED
Core: 60 Sample Midpoint(m) : 640.85 Sect/Pc #: 6/PCE 2B
ROCK = BASALTIC BRECCIA
MOD ALTERED,QUENCHED BASALT FRAGMENTS,PLAG AND
FRESH GLASS IN FINE-GRAINED MATRIX;
Texture: CLASTIC;
Where sampled: BRECCIA*
Alteration - CALCITE
Location: MATRIX Replacing: GLASS
Leg : 52 Top/Bottom Interval(mm): 950/ 0 Describer: Ricou, L.
Hole: 417D Top of Core Depth(m) : 642.00 Rock Type: IGNEOUS
Core: 62 Sample Midpoint(m) : 642.95 Sect/Pc #: 1/PCE 4E
ROCK = PLAG-OL-CPX PHYRIC BASALT
SLIGHTLY ALTERED,PILLOW BASALT WITH GLASSY CHILLED
MARGINS;
Texture: HIGHLY PHYRIC,QUENCHED;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): .5-1 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 30%)
Size(mm): 1-8 Morphology: EUHEDRAL
ZONED WITH INCLUSIONS;
CLINOPYROXENE
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): .2-.5 Morphology: SKELETAL
CLINOPYROXENE ( 20%)
Size(mm): .2-.5 Morphology: PLUMOSE
MAGNETITE ( 5%)
Size(mm): .1 Morphology: EUHEDRAL
MORE ABUNDANT IN MOTTLED ZONES;
GLASS ( 5%)
ALTERED;
CLAY ( 10%)
BROWN CLAY,POSSIBLY AFTER PLUMOSE PYX*
Alteration - CLAY MINERALS
Replacing: OL
Vesicles -
Size(mm): .2-1
Percent: 2
Filling: CLAY,CALCITE
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 650/ 0 Describer: Pertsev, N.
Hole: 417D Top of Core Depth(m) : 651.00 Rock Type: IGNEOUS
Core: 63 Sample Midpoint(m) : 653.15 Sect/Pc #: 2/PCE 1E-1
ROCK = PLAG-CPX-OL PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: SUBOPHITIC,PORPHYRITIC
GLOMEROPHYRIC AGGREGATES OF PLAG AND CPX PHENOS;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 1 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): 1-3 Morphology: LATHS
CLINOPYROXENE ( 2%)
Size(mm): 1-2 Morphology: ANHEDRAL
Groundmass - OLIVINE ( 10%)
Size(mm): .1 Morphology: EUHEDRAL
PLAGIOCLASE ( 40%)
Size(mm): 1 Morphology: EUHEDRAL
CLINOPYROXENE ( 20%)
Size(mm): .05 Morphology: ANHEDRAL
PYRITE ( 10%)
Alteration - CLAY MINERALS
Replacing: OL
BROWN SMECTITE*
Leg : 52 Top/Bottom Interval(mm): 180/ 0 Describer: Pertsev, N.
Hole: 417D Top of Core Depth(m) : 651.00 Rock Type: IGNEOUS
Core: 63 Sample Midpoint(m) : 654.18 Sect/Pc #: 3/PCE 1A
ROCK = PLAG-CPX PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: VARIOLITIC,PORPHYRITIC
GLOMEROPHYRIC AGGREGATES OF PLAG AND CPX PHENOS*
Phenocrysts- PLAGIOCLASE ( 20%)
Size(mm): 1.5-3 Morphology: LATHS
CLINOPYROXENE ( 2%)
Size(mm): <1 Morphology: ANHEDRAL
Groundmass - OLIVINE ( 10%)
Size(mm): .03
IDENTITY UNCERTAIN FOR OLIVINE,ALTERED;
PLAGIOCLASE ( 30%)
Size(mm): .1
CLINOPYROXENE ( 38%)
Size(mm): .03
MAGNETITE ( 5%)
Size(mm): .01
PYRITE ( 5%)
Size(mm): .02
Alteration - CALCITE ( 40%)
Location: VEIN
CLAY MINERALS ( 20%)
Location: VEIN,
Location: GROUNDMASS
ZEOLITE ( 25%)
Location: VEIN
SILICA ( 15%)
Location: VEIN
Vesicles -
Size(mm): .3
Percent: <1
Filling: CALCITE
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 530/ 0 Describer: Pertsev, N.
Hole: 417D Top of Core Depth(m) : 651.00 Rock Type: IGNEOUS
Core: 63 Sample Midpoint(m) : 654.53 Sect/Pc #: 3/PCE 1C
ROCK = PLAG-PHYRIC BASALT
QUARTZ-SMECTITE-PYRITE VEIN IN PHYRIC BASALT;
Texture: INTERSERTAL,PORPHYRITIC*
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE ( 10%)
Size(mm): TO 4 Morphology: LATHS
Groundmass - OLIVINE ( 10%)
Size(mm): .1
ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): .5
CLINOPYROXENE ( 10%)
Size(mm): .1
MAGNETITE ( 5%)
Size(mm): .02
GLASS ( 50%)
ALTERED;
PYRITE ( <1%)
Alteration - CARBONATE ( 0%)
CLAY MINERALS ( 55%)
Location: GROUNDMASS, Replacing: OL,GLASS
Location: VEINS
IN VEINS 40%;
SILICA
Location: VEIN
IN VEIN 20%;
PYRITE
0.5-.7 MM EUHEDRAL,IN VEIN 40%*
Leg : 52 Top/Bottom Interval(mm): 880/ 0 Describer: Byerly, G.
Hole: 417D Top of Core Depth(m) : 660.00 Rock Type: IGNEOUS
Core: 64 Sample Midpoint(m) : 665.38 Sect/Pc #: 4/PCE 6
ROCK = PLAG-OL MODERATELY PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: TACHYLITIC*
Phenocrysts- OLIVINE ( <1%)
Size(mm): <.2 Morphology: EUHEDRAL,QUENCHED
ALTERED;
PLAGIOCLASE ( <2%)
Size(mm): <.4 Morphology: LATHS,QUENCHED
Groundmass - PLAGIOCLASE ( 10%)
Morphology: NEEDLES
CLINOPYROXENE ( 20%)
Size(mm): <.03 Morphology: FIBROUS BUNDLES
MAGNETITE ( 5-10%)
Size(mm): <.03 Morphology: EUHEDRAL
GLASS ( 50%)
DEVITRIFIED*
Alteration - CALCITE ( 2%)
Replacing: OL
Vesicles -
Size(mm): <.3
Percent: <1
Filling: CALCITE
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 160/ 0 Describer: Byerly, G.
Hole: 417D Top of Core Depth(m) : 660.00 Rock Type: IGNEOUS
Core: 64 Sample Midpoint(m) : 667.66 Sect/Pc #: 6/PCE 1
ROCK = PLAG-OL PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: INTERSERTAL,QUENCHED;
GLOMEROPORPHYRITIC AGGREGATES OF PLAG+CPX;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): <2 Morphology: EUHEDRAL-SKELETAL
ALTERED;
PLAGIOCLASE ( 12%)
Size(mm): <5 Morphology: EUHEDRAL,LATHS
ALTERED GLASS INCLUSIONS*
Groundmass - PLAGIOCLASE ( 35%)
Morphology: LATHS
SERIATE;
CLINOPYROXENE ( 35%)
Size(mm): <.1
MAGNETITE ( 5%)
Size(mm): <.05 Morphology: EUHEDRAL
GLASS ( 10%)
ALTERED*
Alteration - CALCITE ( 1%)
Location: MINOR VEIN,
Location: VESICLES
CLAY MINERALS ( 10%)
Location: MINOR VEIN Replacing: OL,GLASS
Vesicles -
Size(mm): <1
Percent: 1
Filling: CALCITE
COMPLEX 3-PHASE FILLING*
Leg : 52 Top/Bottom Interval(mm): 80/ 0 Describer: Swanson, D.
Hole: 417D Top of Core Depth(m) : 669.00 Rock Type: IGNEOUS
Core: 65 Sample Midpoint(m) : 670.58 Sect/Pc #: 2/PCE 1
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED;
Texture: PHYRIC,INTERGRANULAR,QUENCHED;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): .5-3 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 12%)
Size(mm): .5-4 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( <1%)
Size(mm): 1 Morphology: ANHEDRAL
IN GLOMEROCRYSTS AND OCCASIONALLY IN ROUNDED
MEGACRYSTS WITH PLAG*
Groundmass - OLIVINE ( 2%)
Size(mm): .08-1 Morphology: EUHEDRAL
PLAGIOCLASE ( 35%)
Size(mm): .05 Morphology: EUHEDRAL-LATHS
CLINOPYROXENE ( 35%)
Size(mm): .05 Morphology: ANHEDRAL-SUBHEDRAL
MAGNETITE ( 3%)
Size(mm): .03
GLASS ( 10%)
ALTERED*
Alteration - SMECTITE ( 15%)
Location: VEIN,PHENOS Replacing: OL,GLASS
CALCITE ( 1%)
Location: VEIN,PHENOS, Replacing: OL
Location: GROUNDMASS
Vesicles -
Size(mm): .1
Percent: <1
Filling: CALCITE,
Shape: ROUND
Filling: SMECTITE
Leg : 52 Top/Bottom Interval(mm): 1230/ 0 Describer: Swanson, D.
Hole: 417D Top of Core Depth(m) : 669.00 Rock Type: IGNEOUS
Core: 65 Sample Midpoint(m) : 674.73 Sect/Pc #: 4/PCE 7-1
ROCK = PLAG-OL-CPX PHYRIC BASALT
MOD ALTERED;
Texture: PHYRIC,INTERGRANULAR;
GLOMEROPORPHYRITIC AGGREGATES OF PLAG AND CPX;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): .5-1.6 Morphology: EUHEDRAL
SERIATE TO MICROLITES;
PLAGIOCLASE ( 16%)
Size(mm): 1-1.5 Morphology: EUHEDRAL
GLOMEROCRYSTS COMMON;
CLINOPYROXENE ( 1%)
Size(mm): .5-.8 Morphology: SUBHEDRAL
COMMONLY IN GLOMEROCRYSTS WITH PLAG*
Groundmass - OLIVINE ( 2%)
Size(mm): .06 Morphology: EUHEDRAL
PSEUDOMORPHED BY SMECTITE;
PLAGIOCLASE ( 40%)
Size(mm): .1 Morphology: EUHEDRAL
CLINOPYROXENE ( 35%)
Size(mm): .06-.08 Morphology: SUBHEDRAL
COMBINATION ( 5%)
INCLUDES GLASS+OPAQUES*
Alteration - CALCITE ( <1%)
Replacing: OL
SMECTITE ( 8%)
Replacing: OL,GLASS
Vesicles -
Size(mm): .5
Percent: <1
Filling: SMECTITE
Leg : 52 Top/Bottom Interval(mm): 450/ 0 Describer: Byerly, G.
Hole: 417D Top of Core Depth(m) : 678.00 Rock Type: IGNEOUS
Core: 66 Sample Midpoint(m) : 681.45 Sect/Pc #: 3/PCE 1B
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH GLASSY CHILLED
MARGINS*
Texture: QUENCHED,VARIOLITIC,PORPHYRITIC
GLOMEROPORPHYRITIC AGGREGATES OF PLAG AND CPX;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): <3 Morphology: EUHEDRAL-SKELETAL
ALTERED;
PLAGIOCLASE ( 12%)
Size(mm): <5 Morphology: SKELETAL,LATHS
MANY INCLUSIONS (INCLUDING TRACES OF SPINEL),
COMMONLY IN GLOMEROCRYSTS WITH OL;
SPINEL ( TR%)
Morphology: ROUNDED
Groundmass - PLAGIOCLASE ( 30%)
Morphology: SKELETAL,LATHS
SERIATE;
CLINOPYROXENE ( 40%)
Size(mm): <.05 Morphology: FIBROUS-GRANULAR
MAGNETITE ( 5%)
Size(mm): <.02 Morphology: EUHEDRAL
GLASS ( 10%)
ALTERED*
Alteration - SMECTITE ( <1%)
Replacing: OL,GLASS
CALCITE ( <1%)
Location: VESICLES
Vesicles -
Percent: <1
Filling: CALCITE,SMEC
Leg : 52 Top/Bottom Interval(mm): 700/ 0 Describer: Swanson, D.
Hole: 417D Top of Core Depth(m) : 678.00 Rock Type: IGNEOUS
Core: 66 Sample Midpoint(m) : 684.70 Sect/Pc #: 5/PCE 3C
ROCK = PLAG-OL PHYRIC BASALT
MOD ALTERED,PILLOW BASALT WITH GLASSY CHILLED
MARGINS AND BRECCIA;
Texture: MODERATELY PHYRIC,PILOTAXITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
Size(mm): .6-1 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 10%)
Size(mm): .5-4 Morphology: EUHEDRAL-SUBHEDRAL
Groundmass - OLIVINE ( 2%)
COMBINATION ( 88%)
INCLUDES PLAG+CPX+MAGN,FLOW-ALIGNED PLAG BETWEEN
FIBROUS MATERIAL-FINELY XTLLINE CPX OR PLAG?*
Alteration - CALCITE ( 3%)
Replacing: OL
CLAY MINERALS ( 10%)
Replacing: OL,GLASS
IDENTITY UNCERTAIN FOR GLASS*
Vesicles -
Size(mm): .3-.5
Percent: 2
Filling: CALCITE,
Shape: ROUND
Filling: SMECTITE,
Filling: ZEOLITES
IDENTITY UNCERTAIN FOR ZEOLITES,
SOME FILLING CRESCENTIC*
Leg : 52 Top/Bottom Interval(mm): 390/ 0 Describer: Swanson, D.
Hole: 417D Top of Core Depth(m) : 678.00 Rock Type: IGNEOUS
Core: 66 Sample Midpoint(m) : 685.89 Sect/Pc #: 6/PCE 3B
ROCK = HYALOCLASTITE
MOD ALTERED,PILLOW BASALT CONTAINING FRAGMENTS OF
FRESH GLASS*
Texture: GLASSY,PHYRIC;
Where sampled: HYALOCLASTITE*
Phenocrysts- OLIVINE ( 1%)
Morphology: SKELETAL
PLAGIOCLASE ( 3%)
Morphology: EUHEDRAL-SKELETAL
WITH MANY GLASS INCLUSIONS*
Groundmass - GLASS ( 96%)
FRESH WITH SOME PALAGONITE AND SMECTITE*
Leg : 52 Top/Bottom Interval(mm): 300/ 0 Describer: Byerly, G.
Hole: 417D Top of Core Depth(m) : 687.00 Rock Type: IGNEOUS
Core: 67 Sample Midpoint(m) : 688.80 Sect/Pc #: 2/PCE 1A
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED;
Texture: INTERSERTAL,PORPHYRITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): <5 Morphology: SKELETAL
COMPLETELY ALTERED;
PLAGIOCLASE ( 7%)
Size(mm): <5 Morphology: LATHS
ZONED;
CLINOPYROXENE ( <1%)
Size(mm): <1 Morphology: GRANULAR
COMMONLY IN GLOMEROCRYSTS*
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): <.5 Morphology: ELONGATE MICROLITES
CLINOPYROXENE ( 40%)
Size(mm): <.1 Morphology: GRANULAR,RADIATING BUNDLES
MAGNETITE ( 5%)
Size(mm): <.05 Morphology: EUHEDRAL
GLASS ( 10%)
DEVITRIFIED,ALTERED*
Alteration - CARBONATE ( 0%)
CLAY MINERALS ( 15%)
Replacing: GLASS,OL
SILICA ( TR%)
Replacing: OL
SILICA
Location: OL
Location: PSEUDOMORPHS
Vesicles -
Size(mm): <1
Percent: <1
Filling: DEVITRIFIED
Filling: GLASS,SMECTITE
GEOPETAL STRUCTURES*
Leg : 52 Top/Bottom Interval(mm): 310/ 330 Describer: Pertsev, N.
Hole: 417D Top of Core Depth(m) : 687.00 Rock Type: IGNEOUS
Core: 67 Sample Midpoint(m) : 691.82 Sect/Pc #: 4/PCE 1A-1
ROCK = PLAG-OL-CPX PHYRIC BASALT;
Texture: PORPHYRITIC,INTERSERTAL;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 3%)
Size(mm): 1 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): 5 Morphology: LATHS
CLINOPYROXENE ( 3%)
Size(mm): 1 Morphology: ANHEDRAL
GLOMEROPORPHYRITIC WITH PLAG*
Groundmass - OLIVINE ( 10%)
ALTERED;
PLAGIOCLASE ( 10%)
CLINOPYROXENE ( 40%)
MAGNETITE ( 9%)
GLASS ( 9%)
ALTERED*
Alteration - CARBONATE ( <1%)
Location: VEINS Replacing: OL
PSEUDOMORPHS AFTER OL;
CLAY MINERALS ( <20%)
Location: VEINS,PHENOS, Replacing: OL,GLASS
Location: GROUNDMASS
Vesicles -
Size(mm): TO 3
Percent: 1
Filling: CALCITE,SMEC
Shape: ROUND,
Shape: IRREGULAR
Leg : 52 Top/Bottom Interval(mm): 360/ 0 Describer: Ricou, L.
Hole: 417D Top of Core Depth(m) : 687.00 Rock Type: IGNEOUS
Core: 67 Sample Midpoint(m) : 696.36 Sect/Pc #: 7/PCE 1B-1
ROCK = PLAG PHYRIC BASALT
MOD ALTERED;
Texture: MODERATELY PHYRIC,SUBOPHITIC-INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 10%)
Size(mm): 1-5 Morphology: TABLETS
WITH INCLUSIONS,FRESH*
Groundmass - OLIVINE ( 3%)
Size(mm): .1-.3 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 40%)
Size(mm): .2-1 Morphology: EUHEDRAL
CLINOPYROXENE ( 40%)
Size(mm): .2-1
LOCALLY POIKILITIC;
MAGNETITE ( 5%)
Size(mm): .1-.2
GLASS ( 4%)
PYRITE ( .1%)
Alteration - CALCITE ( 5%)
Replacing: OL
CLAY MINERALS ( 7%)
Replacing: OL,GLASS
BROWN*
Vesicles -
Size(mm): 1
Percent: 95
Filling: CLAY,CALCITE
Shape: ROUND
Leg : 52 Top/Bottom Interval(mm): 470/ 0 Describer: Byerly, G.
Hole: 417D Top of Core Depth(m) : 696.00 Rock Type: IGNEOUS
Core: 68 Sample Midpoint(m) : 697.97 Sect/Pc #: 2/PCE 1C
ROCK = PLAG-CPX-OL PHYRIC BASALT
SLIGHTLY ALTERED,CONTAINS BRECCIA;
Texture: VERY FINE GRAINED,PORPHYRITIC,CRYSTALLINE;
Where sampled: DIKE*
Phenocrysts- OLIVINE ( 5%)
Size(mm): <1 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 35%)
Size(mm): <5
OCCASIONALLY ROUNDED WITH ALTERED INCLUSIONS;
CLINOPYROXENE ( 10%)
Size(mm): <2.5
COMMONLY ROUNDED WITH PLAG INCLUSIONS*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): <.02 Morphology: QUENCHED,LATHS
CLINOPYROXENE ( 20%)
Size(mm): <.02 Morphology: QUENCHED,FIBROUS BUNDLES
MAGNETITE ( 10%)
Size(mm): <.02 Morphology: QUENCHED,EUHEDRAL
Alteration - SMECTITE ( 5%)
Replacing: OL
Vesicles -
Percent: 0
Leg : 52 Top/Bottom Interval(mm): 930/ 0 Describer: Swanson, D.
Hole: 417D Top of Core Depth(m) : 696.00 Rock Type: IGNEOUS
Core: 68 Sample Midpoint(m) : 699.93 Sect/Pc #: 3/PCE 2A
ROCK = PLAG PHYRIC BASALT
MOD ALTERED;
Texture: MODERATELY PHYRIC,SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 8%)
Size(mm): 1-10 Morphology: EUHEDRAL
WITH OSCILLATORY ZONING*
Groundmass - PLAGIOCLASE ( 48%)
Size(mm): .3-.5
SUBOPHITIC;
CLINOPYROXENE ( 40%)
Size(mm): .3-.5
SUBOPHITIC;
MAGNETITE ( 3%)
APATITE ( TR%)
KFELDSPAR ( 1%)
Alteration - CLAY MINERALS ( 4%)
Replacing: CPX
DEUTERIC?*
Vesicles -
Percent: 0
Leg : 52 Top/Bottom Interval(mm): 190/ 0 Describer: Swanson, D.
Hole: 417D Top of Core Depth(m) : 696.00 Rock Type: IGNEOUS
Core: 68 Sample Midpoint(m) : 700.69 Sect/Pc #: 4/PCE 1C
ROCK = PLAG-CPX-OL PHYRIC BASALT
MOD ALTERED,WITH ALTERED CHILLED MARGINS;
Texture: PHYRIC,QUENCHED-INTERGRANULAR;
Where sampled: DIKE INTERIOR (VERY THIN)*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 1-2 Morphology: EUHEDRAL
ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): 3 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( 3%)
Size(mm): .5-1 Morphology: SUBHEDRAL-ANHEDRAL
IN ROUNDED MEGACRYSTS OR IN SUBOPHITIC CLOTS WITH
PLAG AND OL*
Groundmass - OLIVINE ( 2%)
Size(mm): <.05
PLAGIOCLASE ( 38%)
Size(mm): <.05
CLINOPYROXENE ( 38%)
Size(mm): <.05
MAGNETITE ( 2%)
Size(mm): <.05
Alteration - SMECTITE ( 5%)
Location: VEIN,PHENOS Replacing: OL
PYRITE ( <1%)
Location: VEIN,PHENOS Replacing: OL
PYRITE IS MINOR,WITH SMECTITE*
Leg : 52 Top/Bottom Interval(mm): 130/ 0 Describer: Pertsev, N.
Hole: 417D Top of Core Depth(m) : 705.00 Rock Type: IGNEOUS
Core: 69 Sample Midpoint(m) : 705.13 Sect/Pc #: 1/PCE 1B
ROCK = PLAG-CPX-OL PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: OPHITIC,PORPHYRITIC
GLOMEROPORPHYRITIC AGGREGATES OF PLAG AND CPX;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): 2 Morphology: EUHEDRAL
ALTERED*
PLAGIOCLASE ( 10%)
Size(mm): 5 Morphology: LATHS
CLINOPYROXENE ( 7%)
Size(mm): 4
COMMONLY IN GLOMEROCRYSTS WITH PLAG*
Groundmass - OLIVINE ( 10%)
Size(mm): .5
ALTERED;
PLAGIOCLASE ( 37%)
Size(mm): .5
CLINOPYROXENE ( 25%)
Size(mm): .5
MAGNETITE ( 8%)
Size(mm): .5
COMBINATION ( <1%)
Size(mm): .8
INCLUDES KSPAR+APATITE,APATITE AS NEEDLES IN
KSPAR*
Alteration - CLAY MINERALS ( 13%)
Replacing: OL,CPX,PLAG
CALCITE ( <1%)
Replacing: OL
PYRITE ( <1%)
Location: IN CLAY.MINS
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