Leg : 49 Top/Bottom Interval(mm): 1040/1080 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 340.00 Rock Type: IGNEOUS
Core: 37 Sample Midpoint(m) : 341.06 Sect/Pc #: 1/PCE 11
ROCK = OL-CPX-PLAG SP MICROPHYRIC BASALT
FRESH;
Texture: VARIOLITIC,SP MICROPHYRIC;
Where sampled: NEXT TO MARGIN*
Phenocrysts- OLIVINE ( <1%)
FRESH;
CLINOPYROXENE ( <1%)
FRESH;
PLAGIOCLASE ( <1%)
FRESH*
Groundmass - GLASS ( 5-10%)
ALTERED;
OLIVINE ( 5-10%)
CONCENTRATED IN CERTAIN AREAS;
PLAGIOCLASE ( 45%)
APPROX COMP AN55-60;
CLINOPYROXENE ( 30%)
SOME MICROPHENOS RESORBED;
MICROLITE
IN GLASS;
OPAQUE MINERALS
INCLUDES MAGN+ILMENITE+PYR,IN PATCHES*
Alteration - SMECTITE
Replacing: GLASS,GROUNDMASS
YELLOW BROWN,APPROX 1%;
CHLOROPHAEITE
Replacing: GROUNDMASS
Vesicles -
Size(mm): <1
Percent: <5
CONCENTRATED AROUND VESICLES*
Leg : 49 Top/Bottom Interval(mm): 1170/1200 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 340.00 Rock Type: IGNEOUS
Core: 37 Sample Midpoint(m) : 341.19 Sect/Pc #: 1/PCE 13
ROCK = PLAG MOD PHYRIC BASALT
EXTENSIVELY ALTERED*
Texture: VARIOLITIC,GLASSY,PHYRIC,APHANITIC-
CRYPTOXTALLINE;
Where sampled: GLASSY MARGIN*
Phenocrysts- OLIVINE ( <.1%)
CLINOPYROXENE ( <.1%)
PLAGIOCLASE ( 8.5%)
Groundmass - GLASS
BROWN-BLACK,FRESH TO ALTERED*
Vesicles -
Percent: 20
Filling: CARB,ZEOL
PERCENT VALUE INCLUDES VEINS*
Leg : 49 Top/Bottom Interval(mm): 110/ 160 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 349.50 Rock Type: IGNEOUS
Core: 38 Sample Midpoint(m) : 349.64 Sect/Pc #: 1/PCE 2
ROCK = OL-PLAG-CPX SP MICROPHYRIC BASALT;
Texture: MICROPHYRIC,MICROCRYSTALLINE;
Where sampled: GLASSY MARGIN*
Phenocrysts- OLIVINE ( 1-5%)
Morphology: EUHEDRAL
FRESH,GLOMEROPHYRIC AGGREGATES;
CLINOPYROXENE ( <1%)
PLAGIOCLASE ( <1%)
Morphology: SUBHEDRAL
APPROX COMP AN68-70,FRESH,GLOMEROPHYRIC
AGGREGATES*
Groundmass - GLASS ( >90%)
ALTERED,DARK BROWN*
Vesicles -
Size(mm): .3-2
Percent: 5-7
Filling: CARB,ZEOL
SMALLER VESICLES PARTLY OR COMPLETELY FLLED BY
CALCITE*
Leg : 49 Top/Bottom Interval(mm): 600/ 650 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 349.50 Rock Type: UNIDENTIFIED
Core: 38 Sample Midpoint(m) : 351.63 Sect/Pc #: 2/PCE 8
ROCK = LIMESTONE BASALTIC BRECCIA;
Texture: GLASSY, MICROCRYSTALLINE;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
FRESH TO ALTERED*
Groundmass - GLASS ( 100%)
ALTERED, GRAY BROWN*
Vesicles -
Filling: ZEOL
Leg : 49 Top/Bottom Interval(mm): 0/ 0 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 359.00 Rock Type: UNIDENTIFIED
Core: 39 Sample Midpoint(m) : 359.00 Sect/Pc #: 1/PCE 10B
ROCK = BASALTIC BRECCIA;
Texture: GLASSY,SP MICROPHYRIC;
Where sampled: GLASSY MARGIN*
Phenocrysts- OLIVINE ( 1-5%)
FRESH;
CLINOPYROXENE ( RARE%)
PLAGIOCLASE ( <1%)
Morphology: FELTY
FRESH*
Alteration - CARBONATE
Replacing: GLASS
Leg : 49 Top/Bottom Interval(mm): 130/ 190 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 359.00 Rock Type: UNIDENTIFIED
Core: 39 Sample Midpoint(m) : 359.16 Sect/Pc #: 1/PCE 2
ROCK = BASALTIC BRECCIA;
Texture: SUBVARIOLITIC,GLASSY;
Where sampled: FLOW MARGIN*
Phenocrysts- OLIVINE ( <1%)
Morphology: QUENCH MORPHOLOGIES
FRESH;
PLAGIOCLASE ( <1%)
Morphology: QUENCH MORPHOLOGIES
FRESH*
Groundmass - GLASS ( 72%)
FRESH;
OLIVINE ( 3%)
PLAGIOCLASE ( 20%)
CLINOPYROXENE ( 5%)
Leg : 49 Top/Bottom Interval(mm): 760/ 780 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 359.00 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 359.77 Sect/Pc #: 1/PCE 9A
ROCK = OL-PLAG SP MICROPHYRIC BASALT;
Texture: VARIOLITIC,FINE-GRAINED,SP MICROPHYRIC;
Where sampled: NEXT TO MARGIN*
Phenocrysts- OLIVINE ( <1%)
FRESH;
PLAGIOCLASE ( <1%)
FRESH*
Groundmass - GLASS
ALTERED,BROWN;
OLIVINE ( 5%)
Size(mm): .01-.1
PLAGIOCLASE ( 45%)
Size(mm): .01-.1
CLINOPYROXENE ( 35%)
Size(mm): .01-.1
PYRITE
Size(mm): .01-.1
RARE*
Alteration - SMECTITE
Replacing: GLASS
CHLOROPHAEITE
Location: VESICLE Replacing: GLASS
Leg : 49 Top/Bottom Interval(mm): 620/ 630 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 359.00 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 361.13 Sect/Pc #: 2/PCE 6
ROCK = OL-CPX-PLAG SP MICROPHYRIC BASALT
EXT ALTERED;
Texture: VARIOLITIC, SP MICROPHYRIC;
Where sampled: NEXT TO MARGIN*
Phenocrysts- OLIVINE ( <1%)
Morphology: SUBHEDRAL
FRESH;
CLINOPYROXENE ( <1%)
Morphology: SUBHEDRAL
FRESH;
PLAGIOCLASE ( <1%)
Morphology: SUBHEDRAL
Groundmass - GLASS ( 5%)
BROWN;
Alteration - SMECTITE
Replacing: GLASS
CHLOROPHAEITE
Replacing: GROUNDMASS
ID UNCERTAIN FOR CHLOROPHAEITE*
Vesicles -
Size(mm): <.5
Percent: 5-10
Filling: SMEC,CARB
Leg : 49 Top/Bottom Interval(mm): 220/ 240 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 359.00 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 362.23 Sect/Pc #: 3/PCE 1C
ROCK = APHYRIC BASALT;
Texture: APHYRIC*
Vesicles -
Filling: CARB,ZEOL
Leg : 49 Top/Bottom Interval(mm): 930/ 950 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 359.00 Rock Type: UNIDENTIFIED
Core: 39 Sample Midpoint(m) : 362.94 Sect/Pc #: 3/PCE 6
ROCK = BASALTIC BRECCIA;
Texture: SUBOPHITIC, SP MICROPHYRIC*
Phenocrysts- OLIVINE ( 1-5%)
ALTERED*
Groundmass - OLIVINE ( 3%)
PLAGIOCLASE ( 45%)
CLINOPYROXENE ( 25%)
BROWN,EVOLVED;
OTHER ( 27%)
Alteration - CARBONATE
Replacing: PHENOS
IDDINGSITE
Replacing: PHENOS
Vesicles -
Filling: CARB,ZEOL
Leg : 49 Top/Bottom Interval(mm): 1080/1100 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 359.00 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 363.09 Sect/Pc #: 3/PCE 7
ROCK = OL SP MICROPHRYIC BASALT
EXT ALTERED;
Texture: VARIOLITIC,SUBOPHITIC, SP MICROPHYRIC;
Where sampled: NEXT TO MARGIN*
Phenocrysts- OLIVINE
Morphology: QUENCHED
ALTERED;
PLAGIOCLASE
Morphology: ELONGATED
APPROX COMP AN55-70,GLOMEROPHYRIC*
Groundmass - OLIVINE ( <5%)
Size(mm): 0.01-0.5 Morphology: QUENCHED
PLAGIOCLASE ( 45%)
Size(mm): 0.01-0.5 Morphology: MICROLITES,QUENCHED
CLINOPYROXENE ( 35%)
Size(mm): 0.01-0.5 Morphology: QUENCHED,ELONGATE
OPAQUE MINERALS ( 2%)
INCLUDES ILMENITE+MAG,RESTRICTED TO GLASS;
GLASS ( 5%)
CLOUDY,BROWN,ALTERED*
Alteration - SMECTITE
Replacing: GLASS
CARBONATE
Replacing: PHENOS
IDDINGSITE
Replacing: OL
Vesicles -
Size(mm): <.5
Percent: 10-15
Filling: CARB
ABOUT 5% CARB*
Leg : 49 Top/Bottom Interval(mm): 0/ 0 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 359.00 Rock Type: UNIDENTIFIED
Core: 39 Sample Midpoint(m) : 363.50 Sect/Pc #: 4/PCE 9B
ROCK = LIMESTONE BASALTIC BRECCIA;
Texture: INTERGRANULAR,APHYRIC*
Phenocrysts- OLIVINE ( <1%)
Groundmass - OLIVINE ( 3%)
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 30%)
PALE BROWN COLOR;
GLASS
Alteration - IDDINGSITE
Replacing: OL
CALCITE
Location: FILLINGS Replacing: OL
Vesicles -
Percent: 10-15
Filling: CARB
Leg : 49 Top/Bottom Interval(mm): 510/ 580 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 359.00 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 364.05 Sect/Pc #: 4/PCE 4
ROCK = APHYRIC BASALT;
Texture: VARIOLITIC,APHYRIC;
Where sampled: NEXT TO MARGIN*
Phenocrysts- OLIVINE ( TR%)
ALTERED*
Groundmass - GLASS ( 5%)
BROWN,CLOUDY,ALTERED;
OLIVINE ( TR%)
PLAGIOCLASE ( 45%)
Morphology: SOME SKELETAL
CLINOPYROXENE ( 35%)
OPAQUE MINERALS ( 2%)
INCLUDES ILMENITE+MAGN+MICROLITES IN GLASS*
Alteration - CARBONATE
Replacing: PHENOS
CHLOROPHAEITE
Replacing: PHENOS
IDDINGSITE
Replacing: PHENOS
ID UNCERTAIN FOR IDDINGS AND CHLORPH*
Vesicles -
Size(mm): <1
Percent: 10-15
Filling: EMPTY
Leg : 49 Top/Bottom Interval(mm): 120/ 130 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 359.00 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 365.13 Sect/Pc #: 5/PCE 1B
ROCK = OL SP MICROPHYRIC BASALT
FRESH;
Texture: VARIOLITIC,SP MICROPHYRIC;
Where sampled: NEXT TO MARGIN;
Phenocrysts- OLIVINE ( 2%)
Size(mm): 1.0 Morphology: EUHEDRAL
ALTERED*
Groundmass - GLASS ( 5-10%)
ALTERED,BROWN;
OLIVINE ( 5%)
PLAGIOCLASE ( 45%)
APPROX COMP AN60;
CLINOPYROXENE ( 35%)
Morphology: SOME ELONGATED,OTHERS
Morphology: SUBOPHITIC
OPAQUE MINERALS ( 2-3%)
Morphology: SOME ELONGATED,OCTAHEDRAL
INCLUDES ILMENITE+MAGN,CONFINED TO GLASS
Alteration - SMECTITE
Location: PATCHES OF Replacing: OL
Location: GROUNDMASS
CARBONATE
Replacing: OL
CHLOROPHAEITE
Replacing: OL
Vesicles -
Size(mm): <1
Percent: 10-15
Leg : 49 Top/Bottom Interval(mm): 0/ 0 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 359.00 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 366.50 Sect/Pc #: 6/PCE 1B
ROCK = PLAG-OL-CPX SP MICROPHYRIC BASALT
BASALT BRECCIA?-FILLING BY CALCITE AND FORAMS,
ANGULAR FRAGMENTS;
Texture: INTERGRANULAR,INTERSERTAL,SP MICROPHYRIC*
Phenocrysts- PLAGIOCLASE ( 1-5%)
ALTERED;
CLINOPYROXENE ( <1%)
FRESH, EARLY,COLORLESS,SECTOR ZONING;
OLIVINE ( <1%)
ALTERED*
Groundmass - GLASS ( 12%)
OLIVINE ( 3%)
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 35%)
TITANOMAGNETITE ( TR%)
IN GLASS*
Alteration - IDDINGSITE
Replacing: OL
CALCITE
Replacing: OL
Leg : 49 Top/Bottom Interval(mm): 400/ 450 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 359.00 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 366.93 Sect/Pc #: 6/PCE 5
ROCK = CPX-PLAG-OL SP MICROPHYRIC BASALT
EXT ALTERED;
Texture: INTERSERTAL, SP MICROPHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 1-2%)
PARTLY ALTERED;
OLIVINE ( <1%)
ALTERED;
CLINOPYROXENE ( 1-3%)
FRESH*
Groundmass - OLIVINE ( <5%)
ALTERED COMPLETELY;
PLAGIOCLASE ( 45%)
CLINOPYROXENE ( 35%)
GLASS ( 5-10%)
Alteration - SMECTITE
Replacing: GLASS
CARBONATE
Replacing: PHENOS
IDDINGSITE
Replacing: OL
CALCITE
Replacing: PLAG
PLAG PHENOS PARTLY ALTERED TO CALCITE*
Vesicles -
Size(mm): 1
Percent: 5
Filling: CARB,ZEOL
MANY FILLED*
Leg : 49 Top/Bottom Interval(mm): 0/ 0 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 359.00 Rock Type: HYALOCLASTITE
Core: 39 Sample Midpoint(m) : 368.00 Sect/Pc #: 7/PCE 5
ROCK = HYALOCLASTITE
LIMESTONE MATRIX-FORAM-RICH;
Texture: GLASSY, SP MICROPHYRIC*
Phenocrysts- OLIVINE ( >5%)
Size(mm): .5-1.0 Morphology: SKELETAL
PLAGIOCLASE ( 1-5%)
Size(mm): .1-.7
APPROX COMP AN73,TWO GENERATIONS OF PLAG - ONE
UNSTABLE;
CLINOPYROXENE ( 1-5%)
Size(mm): 0.2-0.5
Groundmass - GLASS
ALTERED,FRESH;
OLIVINE ( 10%)
Morphology: SKELETAL
CLINOPYROXENE ( 4%)
PLAGIOCLASE ( 5%)
Alteration - CALCITE
Replacing: GLASS
Vesicles -
Filling: CARB,ZEOL
Leg : 49 Top/Bottom Interval(mm): 440/ 450 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 368.50 Rock Type: IGNEOUS
Core: 40 Sample Midpoint(m) : 368.95 Sect/Pc #: 1/PCE 5 (?)
ROCK = CPX-OL SP MICROPHYRIC BASALT
FRESH;
Texture: INTERSERTAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
FRESH;
CLINOPYROXENE ( 2%)
FRESH*
Groundmass - GLASS ( 20%)
PERCENTAGE UNCERTAIN,HEAVILY OXIDIZED;
OPAQUE MINERALS ( 0%)
Vesicles -
Size(mm): 1-3
Percent: 10-20
Filling: CARB,ZEOL
CARB CONSTITUTES 5-10% OF ROCK*
Leg : 49 Top/Bottom Interval(mm): 130/ 150 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 378.00 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 378.14 Sect/Pc #: 1/PCE 2
ROCK = CPX-OL SP MICROPHYRIC BASALT;
Texture: VITROPHYRIC, SP MICROPHYRIC*
Phenocrysts- OLIVINE ( 2-3%)
ALTERED;
CLINOPYROXENE ( 4-6%)
FRESH*
Groundmass - GLASS (50-80%)
PLAGIOCLASE
DOUBLE CYCLIC ZONATION;
OLIVINE
Alteration - CALCITE
Replacing: OL
Leg : 49 Top/Bottom Interval(mm): 1190/1210 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 378.00 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 379.20 Sect/Pc #: 1/PCE 13
ROCK = CPX-OL SP MICROPHYRIC BASALT;
Texture: INTERGRANULAR,INTERSERTAL*
Phenocrysts- CLINOPYROXENE ( 5%)
FRESH;
OLIVINE ( 3%)
ALTERED*
Groundmass - OLIVINE ( 3%)
ALTERED;
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 30%)
GLASS ( 27%)
Alteration - CARBONATE
Replacing: OL
FERROUS HYDROX MINS
Replacing: OL
Vesicles -
Size(mm): 3-10
Percent: 15
Filling: CARB,ZEOL
Leg : 49 Top/Bottom Interval(mm): 270/ 300 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 378.00 Rock Type: UNIDENTIFIED
Core: 41 Sample Midpoint(m) : 379.79 Sect/Pc #: 2/PCE 4
ROCK = BASALTIC BRECCIA;
Texture: INTERSERTAL,GLASSY
CHANGES FROM INTERSERTAL TO GLASSY IN SINGLE
FRAGMENT*
Phenocrysts- OLIVINE ( <1%)
ALTERED;
CLINOPYROXENE ( 1-5%)
Size(mm): 1-2
FRESH,MAINLY EARLY;
PLAGIOCLASE ( 1-5%)
ALTERED*
Groundmass - OLIVINE ( 2%)
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 30%)
GLASS ( 20%)
Alteration - CARBONATE
Replacing: PHENOS
Vesicles -
Filling: CARB,ZEOL
Leg : 49 Top/Bottom Interval(mm): 470/ 500 Describer: DSDP microfilm
Hole: 410 Top of Core Depth(m) : 378.00 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 379.99 Sect/Pc #: 2/PCE 6
ROCK = BASALTIC GLASS
FRESH,SOME PALAGONITIZED;
Texture: GLASSY, APHANITIC-CRYPTOXTLLINE;
Where sampled: GLASSY MARGIN AT CONTACT WITH CARB SEDIMENTS*
Phenocrysts- OLIVINE ( <1%)
FRESH;
CLINOPYROXENE ( <1%)
PLAGIOCLASE ( 1-5%)
ZONED,APPROX COMP AN70-75*
Groundmass - GLASS
FRESH,ALTERED*
Vesicles -
Filling: CARB,ZEOL
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