Leg : 49 Top/Bottom Interval(mm): 0/ 0 Describer: DSDP microfilm
Hole: 408 Top of Core Depth(m) : 313.50 Rock Type: IGNEOUS
Core: 34 Sample Midpoint(m) : 321.67 Sect/Pc #: CC/
ROCK = HYALOCLASTITE;
Texture: HYALOCLASTIC*
Phenocrysts- CLINOPYROXENE ( <1%)
PLAGIOCLASE ( 1-5%)
Groundmass - GLASS
ALTERED;
OLIVINE
ALTERED;
PLAGIOCLASE
CLINOPYROXENE
GLASS
ALTERED*
Leg : 49 Top/Bottom Interval(mm): 750/ 800 Describer: DSDP microfilm
Hole: 408 Top of Core Depth(m) : 323.00 Rock Type: IGNEOUS
Core: 35 Sample Midpoint(m) : 323.78 Sect/Pc #: 1/PCE 4D
ROCK = HYALOCLASTITE
EXTENSIVELY ALTERED;
Where sampled: NEXT TO GLASSY MARGIN;
Texture: HYALOCLASTIC*
Phenocrysts- PLAGIOCLASE ( 1-5%)
Morphology: SWALLOWTAIL LATHS OR HOLLOW
Morphology: HOPPER XTLS
APPROX COMP AN48,ALTERED, A FEW MICROPHENOS*
Groundmass - OLIVINE ( TR%)
PLAGIOCLASE ( 20%)
CLINOPYROXENE ( 30%)
OPAQUE MINERALS ( 1-2%)
ILMENITE+MAGN*
Alteration - CARBONATE
Replacing: OL
ID UNCERTAIN FOR OL;
SMECTITE
Replacing: GROUNDMASS
Vesicles -
Size(mm): .5
Percent: 5
Filling: SMEC
Leg : 49 Top/Bottom Interval(mm): 1080/1100 Describer: DSDP microfilm
Hole: 408 Top of Core Depth(m) : 323.00 Rock Type: IGNEOUS
Core: 35 Sample Midpoint(m) : 324.09 Sect/Pc #: 1/PCE 8
ROCK = OL-PLAG SP MICROPHYRIC BASALT
EXT ALTERED;
Where sampled: NEXT TO GLASSY MARGIN;
Texture: VARIOLITIC, SP MICROPHYRIC*
Phenocrysts- OLIVINE ( <1%)
ALTERED;
PLAGIOCLASE ( <1%)
APPROX COMP AN66*
Groundmass - OLIVINE ( 2%)
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 20%)
Morphology: SPHERULITES
GLASS ( 2%)
Alteration - CARBONATE
Replacing: OL,GROUNDMASS
SMECTITE ( 18%)
Replacing: GROUNDMASS
Vesicles -
Size(mm): .5
Percent: 5
Filling: SMEC,CARB,HEMA
SMEC ALONG THE WALL,CARB 2ND LAYER IN,THIN RIM
HEMA BETWEEN SMEC AND CARB AT TIMES*
Leg : 49 Top/Bottom Interval(mm): 1000/1030 Describer: DSDP microfilm
Hole: 408 Top of Core Depth(m) : 332.50 Rock Type: IGNEOUS
Core: 36 Sample Midpoint(m) : 333.52 Sect/Pc #: 1/PCE 10B
ROCK = PLAG SP MICROPHYRIC BASALT
MOD ALTERED;
Texture: SUPBOPHITIC,INTERGRANULAR,SP MICROPHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 1-5%)
FRESH*
Groundmass - PLAGIOCLASE ( 50%)
CLINOPYROXENE ( 30%)
OPAQUE MINERALS ( 2%)
INCLUDES ILMENITE+MAGN*
Alteration - CARBONATE ( 5%)
Replacing: GROUNDMASS
SMECTITE ( 15%)
Replacing: GROUNDMASS
Vesicles -
Size(mm): .75-1
Percent: 2
Filling: SMEC,CARB
SMEC NEXT TO WALL,CARB NEXT LAYER IN FROM WALL*
Leg : 49 Top/Bottom Interval(mm): 120/ 140 Describer: DSDP microfilm
Hole: 408 Top of Core Depth(m) : 332.50 Rock Type: IGNEOUS
Core: 36 Sample Midpoint(m) : 334.13 Sect/Pc #: 2/PCE 1B
ROCK = APHYRIC BASALT;
Where sampled: FLOW INTERIOR;
Texture: SUBOPHITIC,INTERGRANULAR,SUBVARIOLITIC,APHYRIC*
Phenocrysts- PLAGIOCLASE ( <1%)
MICROPHENOS,A FEW GLOMEROPHYRIC*
Alteration - CARBONATE
Replacing: GROUNDMASS
SMECTITE ( 15%)
Replacing: GROUNDMASS
Vesicles -
Size(mm): .5-.75
Percent: 5
Filling: SMEC,CARB
SMEC NEXT TO WALL,CARB NEXT LAYER IN FROM WALL,
NOT ALWAYS BOTH MINERALS IN SAME VESICLE*
Leg : 49 Top/Bottom Interval(mm): 370/ 400 Describer: DSDP microfilm
Hole: 408 Top of Core Depth(m) : 332.50 Rock Type: IGNEOUS
Core: 36 Sample Midpoint(m) : 337.39 Sect/Pc #: 4/PCE 3C
ROCK = APHYRIC BASALT;
Texture: SUBOPHITIC,APHYRIC*
Phenocrysts- PLAGIOCLASE ( <1%)
APPROX COMP AN80*
PLAGIOCLASE ( <1%)
APPROX COMP AN80*
Groundmass - OLIVINE ( TR%)
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 20%)
OPAQUE MINERALS ( 3%)
INCLUDES MAGN+ILMENITE;
GLASS
ALTERED*
Alteration - SMECTITE
Replacing: GROUNDMASS
Vesicles -
Size(mm): .1-.5
Percent: 20-30
Filling: SMEC,LIM,GOET
Leg : 49 Top/Bottom Interval(mm): 440/ 470 Describer: DSDP microfilm
Hole: 408 Top of Core Depth(m) : 332.50 Rock Type: IGNEOUS
Core: 36 Sample Midpoint(m) : 338.96 Sect/Pc #: 5/PCE 4A
ROCK = PLAG SP MICROPHYRIC BASALT;
Texture: SUBOPHITIC,SP MICROPHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE
APPROX COMP AN68-58,MICROPHENOS*
Groundmass - OLIVINE ( TR%)
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 40%)
OPAQUE MINERALS ( 1-3%)
INCLUDES MAGN+ILMENITE;
GLASS
ALTERED*
Alteration - CLAY MINERALS
Replacing: GLASS
FERROUS HYDROX MINS
Replacing: GLASS
SMECTITE
Replacing: GROUNDMASS
CALCITE ( <1%)
Replacing: GROUNDMASS
Vesicles -
Size(mm): .5-1.5
Percent: 5
Filling: SMEC,ZEOL,CARB
Shape: ROUND
Leg : 49 Top/Bottom Interval(mm): 1400/1410 Describer: DSDP microfilm
Hole: 408 Top of Core Depth(m) : 343.00 Rock Type: IGNEOUS
Core: 37 Sample Midpoint(m) : 344.41 Sect/Pc #: 1/PCE 15
ROCK = APHYRIC BASALT;
Where sampled: FLOW AT CONTACT WITH SEDIMENT;
Texture: VARIOLITIC,APHYRIC*
Phenocrysts- PLAGIOCLASE
APPROX COMP AN48*
Groundmass - PLAGIOCLASE ( 30%)
CLINOPYROXENE ( 10%)
GLASS (50-60%)
ALTERED DARK BROWN;
MAGNETITE
DUST IN GLASS*
Alteration - SMECTITE
Replacing: GLASS
Vesicles -
Size(mm): .1-1.5
Percent: 5-10
Leg : 49 Top/Bottom Interval(mm): 440/ 460 Describer: DSDP microfilm
Hole: 408 Top of Core Depth(m) : 343.00 Rock Type: IGNEOUS
Core: 37 Sample Midpoint(m) : 344.95 Sect/Pc #: 2/PCE 7
ROCK = APHYRIC BASALT;
Texture: VARIOLITIC,APHYRIC;
Where sampled: CHILLED MARGIN*
Groundmass - GLASS
ALTERED*
Alteration - SMECTITE
Replacing: GLASS
Vesicles -
Size(mm): 0.2-1.5
Percent: 10-15
Leg : 49 Top/Bottom Interval(mm): 700/ 750 Describer: DSDP microfilm
Hole: 408 Top of Core Depth(m) : 343.00 Rock Type: IGNEOUS
Core: 37 Sample Midpoint(m) : 345.23 Sect/Pc #: 2/PCE 11
ROCK = APHYRIC BASALT;
Where sampled: CHILLED MARGIN;
Texture: APHYRIC*
Groundmass - GLASS
Alteration - SMECTITE
Replacing: GLASS
Vesicles -
Size(mm): .1-1
Percent: 20
Filling: SMEC,CALCITE
Leg : 49 Top/Bottom Interval(mm): 1030/1050 Describer: DSDP microfilm
Hole: 408 Top of Core Depth(m) : 343.00 Rock Type: IGNEOUS
Core: 37 Sample Midpoint(m) : 345.54 Sect/Pc #: 2/PCE 16
ROCK = PILLOW MARGIN;
Where sampled: GLASSY MARGIN
SECTION THROUGH GLASS TO SPHERULITIC ZONE TO
COMPLETELY DEVITRIFIED GLASS;
Texture: VARIOLITIC
FOR DEVITRIFIED GLASS ZONE*
Leg : 49 Top/Bottom Interval(mm): 350/ 370 Describer: DSDP microfilm
Hole: 408 Top of Core Depth(m) : 343.00 Rock Type: IGNEOUS
Core: 37 Sample Midpoint(m) : 346.36 Sect/Pc #: 3/
ROCK = APHYRIC BASALT
EXT ALTERED;
Where sampled: FLOW INTERIOR;
Texture: VARIOLITIC,APHYRIC*
Groundmass - OLIVINE ( 10%)
Size(mm): 0.1-1.0
ALTERED TO SMEC;
PLAGIOCLASE ( 40%)
Size(mm): 0.1-1.0
NORMALLY ZONED,ALTERED;
CLINOPYROXENE ( 25%)
Size(mm): 0.1-1.0
PALE BROWN,PLEOCHROIC;
GLASS ( 10%)
ALTERED*
Alteration - SMECTITE
Replacing: GLASS
CARBONATE
Replacing: GLASS
Vesicles -
Percent: 15
Filling: SMEC,CARB
Leg : 49 Top/Bottom Interval(mm): 1420/1450 Describer: DSDP microfilm
Hole: 408 Top of Core Depth(m) : 351.50 Rock Type: IGNEOUS
Core: 38 Sample Midpoint(m) : 352.94 Sect/Pc #: 1/PCE 20
ROCK = APHYRIC BASALT
FRESH;
Where sampled: FLOW INTERIOR;
Texture: VARIOLITIC,OPHITIC,SUBOPHITIC,APHYRIC*
Phenocrysts- PLAGIOCLASE
APPROX COMP AN45*
Groundmass - OLIVINE ( TR%)
PLAGIOCLASE ( 40%)
APPROX COMP AN56-45;
CLINOPYROXENE ( 25%)
ILMENITE ( 1%)
MAGNETITE ( 4%)
Alteration - SMECTITE
Replacing: GLASS
Vesicles -
Filling: SMEC
Leg : 49 Top/Bottom Interval(mm): 40/ 70 Describer: DSDP microfilm
Hole: 408 Top of Core Depth(m) : 351.50 Rock Type: IGNEOUS
Core: 38 Sample Midpoint(m) : 353.06 Sect/Pc #: 2/PCE 1
ROCK = APHYRIC BASALT;
Texture: VARIOLITIC,APHYRIC*
Groundmass - PLAGIOCLASE ( 40%)
APPROX COMP AN62-57;
CLINOPYROXENE ( 40%)
COLORED (FE-TI RICH);
OLIVINE ( 10%)
GLASS
PLAGIOCLASE ( 40%)
APPROX COMP AN62-57;
CLINOPYROXENE ( 40%)
COLORED (FE-TI RICH);
OLIVINE ( 10%)
GLASS
Alteration - SMECTITE
Replacing: OL,GLASS
CALCITE
Replacing: OL
Vesicles -
Filling: FIBROUS MINS
VESICULAR*
Leg : 49 Top/Bottom Interval(mm): 530/ 550 Describer: DSDP microfilm
Hole: 408 Top of Core Depth(m) : 351.50 Rock Type: IGNEOUS
Core: 38 Sample Midpoint(m) : 353.54 Sect/Pc #: 2/PCE 7
ROCK = APHYRIC BASALT;
Texture: APHYRIC;
Where sampled: FLOW MARGIN*
Groundmass - PLAGIOCLASE ( TR%)
GLASS
ALTERED;
OPAQUE MINERALS
LOCATED IN THE GLASS*
Vesicles -
Size(mm): 1
Percent: 5
Filling: CHLOR,ZEOL
Leg : 49 Top/Bottom Interval(mm): 880/ 900 Describer: DSDP microfilm
Hole: 408 Top of Core Depth(m) : 351.50 Rock Type: IGNEOUS
Core: 38 Sample Midpoint(m) : 355.39 Sect/Pc #: 3/PCE 15
ROCK = APHYRIC BASALT;
Texture: VARIOLITIC,OPHITIC,SUBOPHITIC,APHYRIC*
Where sampled: FLOW MARGIN*
Phenocrysts- OLIVINE ( <1%)
ALTERED;
PLAGIOCLASE
APPROX COMP AN56-46*
Groundmass - OLIVINE ( 1%)
PLAGIOCLASE ( 45%)
CLINOPYROXENE ( 30%)
OPAQUE MINERALS ( 5%)
INCLUDES MAGN+ILMENITE;
GLASS ( 20%)
ALTERED*
Alteration - CHLORITE
Replacing: OL
CALCITE
Replacing: OL
SMECTITE
Replacing: PHENOS
Vesicles -
Filling: SMEC,CHLOR
Leg : 49 Top/Bottom Interval(mm): 300/ 320 Describer: DSDP microfilm
Hole: 408 Top of Core Depth(m) : 351.50 Rock Type: IGNEOUS
Core: 38 Sample Midpoint(m) : 356.31 Sect/Pc #: 4/PCE 5
ROCK = APHYRIC BASALT
MOD ALTERED;
Texture: VARIOLITIC,OPHITIC,GLASSY,VERY FINE-GRAINED,
APHYRIC;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( TR%)
PLAGIOCLASE ( 30%)
CLINOPYROXENE ( 20%)
ILMENITE ( 1%)
MAGNETITE ( 4%)
GLASS ( 45%)
ALTERED*
Alteration - SMECTITE
Replacing: PHENOS,GLASS
CHLORITE
Replacing: GLASS
PYRITE
Replacing: GLASS
Vesicles -
Size(mm): 1-5
Percent: 10
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