Leg : 49 Top/Bottom Interval(mm): 20/ 100 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 156.00 Rock Type: IGNEOUS
Core: 1 Sample Midpoint(m) : 156.06 Sect/Pc #: 1/PCE 1
ROCK = PLAG SP MICROPHYRIC BASLAT;
Texture: SUBOPHITIC,INTERGRANULAR,COARSE-GRAINED,SP
MICROPHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <1%)
APPROX COMP AN61-54,FRESH*
Groundmass - GLASS ( 5%)
ALTERED;
PLAGIOCLASE ( 45%)
CLINOPYROXENE ( 45%)
Alteration - CHLORITE
Replacing: GLASS
OPAQUE MINERALS
Replacing: GLASS
Vesicles -
Size(mm): <0.3
Percent: 1
Leg : 49 Top/Bottom Interval(mm): 300/ 320 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 156.00 Rock Type: IGNEOUS
Core: 1 Sample Midpoint(m) : 156.31 Sect/Pc #: 1/PCE 3
ROCK = OL-PLAG SP PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: SUBOPHITIC,INTERGRANULAR,INTERSERTAL,SP PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
PLAGIOCLASE ( <1%)
APPROX COMP AN65*
Groundmass - OLIVINE ( 5-7%)
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 35%)
COLORLESS;
OPAQUE MINERALS ( 5-7%)
INCLUDES ILMENITE+MAGN;
GLASS (10-15%)
FRESH,ALTERED,PALE BROWN WHEN FRESH*
Alteration - SMECTITE
Replacing: GLASS
Vesicles -
Size(mm): 1
Percent: 3-5
Filling: SMEC,IDDINGS
Leg : 49 Top/Bottom Interval(mm): 180/ 220 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 165.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 165.70 Sect/Pc #: 1/PCE 3
ROCK = PLAG-CPX-OL PHYRIC BASALT;
Texture: SUBOPHITIC,INTERGRANULAR,PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( >5%)
Size(mm): 2
FRESH,APPROX COMP AN77;
CLINOPYROXENE ( >5%)
Size(mm): 2
FRESH,RIMMED;
OLIVINE ( <1%)
Size(mm): 0.5
FRESH*
Groundmass - OLIVINE ( TR%)
PLAGIOCLASE ( 45%)
CLINOPYROXENE ( 45%)
OPAQUE MINERALS ( TR%)
INCLUDES MAGN+ILMENITE,LATE*
Leg : 49 Top/Bottom Interval(mm): 250/ 300 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 165.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 167.28 Sect/Pc #: 2/
ROCK = PLAG-CPX-OL PHYRIC BASALT
FRESH (SLIGHT ALTERATION);
Texture: SUBOPHITIC,INTERGRANULAR,PHYRIC,COARSE GRAINED;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE (10-15%)
FRESH,APPROX COMP AN65,NORMAL ZONING*
Groundmass - OLIVINE ( 2-3%)
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 30%)
OPAQUE MINERALS ( 5%)
INCLUDES ILMENITE+MAGN*
Vesicles -
Size(mm): 3
Percent: 2-4
Leg : 49 Top/Bottom Interval(mm): 70/ 100 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 175.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 175.09 Sect/Pc #: 1/PCE 2
ROCK = PLAG-OL SP PHYRIC BASALT;
Texture: VARIOLITIC,INTERGRANULAR,SP PHYRIC*
Phenocrysts- OLIVINE ( <1%)
PLAGIOCLASE ( <1%)
FRESH*
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): 0.1-0.3
CLINOPYROXENE ( 45%)
Size(mm): 0.1-0.3
2ND GENERATION ARE QUENCH*
Vesicles -
Size(mm): .1-0.3
Percent: 2-4
Leg : 49 Top/Bottom Interval(mm): 360/ 400 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 175.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 175.38 Sect/Pc #: 1/PCE 6
ROCK = PLAG-CPX-OL PHYRIC BASALT;
Texture: PHYRIC*
Phenocrysts- PLAGIOCLASE ( >5%)
FRESH, APPROX COMP AN80-50,NORMAL ZONING,NA-RICH
RIMS*
CLINOPYROXENE ( 1-5%)
FRESH;
OLIVINE ( <1%)
FRESH TO PARTLY ALTERED*
Groundmass - GLASS
ALTERED;
OPAQUE MINERALS
CLINOPYROXENE
Morphology: SHEAVES
Alteration - CARBONATE
Replacing: OL
Vesicles -
Size(mm): 0.2
Percent: <1
Leg : 49 Top/Bottom Interval(mm): 700/ 800 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 175.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 175.75 Sect/Pc #: 1/PCE 9
ROCK = PLAG-CPX-OL PHYRIC BASALT;
Texture: SUBOPHITIC,INTERGRANULAR,COARSE-GRAINED,PHYRIC*
Phenocrysts- PLAGIOCLASE ( >5%)
NORMAL ZONING,FRESH*
CLINOPYROXENE ( 1-5%)
ZONED,FRESH;
OLIVINE ( <1%)
FRESH,ALTERED*
Groundmass - OLIVINE ( 1-3%)
PLAGIOCLASE ( 50%)
CLINOPYROXENE ( 25%)
OPAQUE MINERALS ( 7%)
INCLUDES ILMENITE+MAGN;
GLASS
Alteration - SMECTITE
Replacing: PHENOS,GLASS
Leg : 49 Top/Bottom Interval(mm): 700/ 800 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 175.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 177.25 Sect/Pc #: 2/PCE 4B
ROCK = PLAG-CPX-OL PHYRIC BASALT
SLIGHTLY ALTERED;
Texture: SUBOPHITIC, INTERGRANULAR,COARSE-GRAINED,
Piece #: IC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 10%)
FRESH;
CLINOPYROXENE ( 4%)
FRESH;
OLIVINE ( 1-5%)
FRESH*
Groundmass - OLIVINE ( 10%)
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 30%)
GLASS ( 3%)
OPAQUE MINERALS ( 17%)
INCLUDES ILMENITE+MAGN*
Alteration - SMECTITE
Replacing: PHENOS,GLASS
Vesicles -
Size(mm): 1
Percent: 1
Filling: SMEC
Leg : 49 Top/Bottom Interval(mm): 270/ 300 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 175.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 178.29 Sect/Pc #: 3/PCE 3
ROCK = CPX-PLAG-OL PHYRIC BASALT
QUENCH FLOW;
Texture: GLASSY,VITROPHYRIC;
Where sampled: FLOW MARGIN*
Phenocrysts- CLINOPYROXENE ( >5%)
FRESH,HOURGLASS EXTINCTION;
PLAGIOCLASE ( >5%)
FRESH, NORMAL ZONING,APPROX COMP AN65(?),NA-RICH
RIMS;
OLIVINE ( 1-5%)
FRESH,ALTERED*
Groundmass - GLASS ( 70%)
FRESH;
OLIVINE ( TR%)
Size(mm): .01-.05
PLAGIOCLASE ( 5%)
Size(mm): .01-.05
CLINOPYROXENE ( 5%)
Size(mm): .01-.05 Morphology: PLUMOSE
Alteration - SMECTITE
Replacing: GLASS
CHLORITE
Replacing: PHENOS
Vesicles -
Size(mm): .01-.05
Percent: 2-4
Filling: CHLORITE
Leg : 49 Top/Bottom Interval(mm): 200/ 250 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 184.50 Rock Type: IGNEOUS
Core: 4 Sample Midpoint(m) : 184.72 Sect/Pc #: 1/PCE 3A
ROCK = APHYRIC BASALT
MOD ALTERED (FOR GLASS);
Where sampled: FLOW INTERIOR;
Texture: INTERGRANULAR,APHYRIC,COARSE-GRAINED*
Phenocrysts- PLAGIOCLASE ( >1%)
FRESH*
Groundmass - OLIVINE
ALTERED;
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 35%)
OPAQUE MINERALS ( 5%)
INCLUDES ILMENITE+MAGN;
GLASS ( 20%)
Alteration - SMECTITE
Replacing: GLASS
Vesicles -
Size(mm): 1-2
Percent: 2
Leg : 49 Top/Bottom Interval(mm): 400/ 430 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 184.50 Rock Type: IGNEOUS
Core: 4 Sample Midpoint(m) : 184.92 Sect/Pc #: 1/PCE 5
ROCK = OL-PLAG-CPX SP MICROPHYRIC BASALT;
Texture: VARIOLITIC-INTERGRANULAR;
Where sampled: NEXT TO MARGIN*
Phenocrysts- OLIVINE ( <1%)
FRESH,ALTERED;
CLINOPYROXENE ( <1%)
FRESH;
PLAGIOCLASE ( <1%)
FRESH*
Groundmass - OLIVINE ( 3-5%)
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 35%)
OPAQUE MINERALS ( 5%)
INCLUDES ILMENITE+MAGN;
GLASS ( 20%)
Alteration - SMECTITE
Replacing: GROUNDMASS
ZEOLITE
Replacing: GROUNDMASS
Vesicles -
Size(mm): <0.1
Percent: 1
Leg : 49 Top/Bottom Interval(mm): 500/ 540 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 194.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 194.52 Sect/Pc #: 1/PCE 5
ROCK = PLAG-OL-CPX MICROPHYRIC BASALT;
Texture: SUBOPHITIC-INTERSERTAL,MICROPHYRIC*
Phenocrysts- PLAGIOCLASE ( 0-17%)
OLIVINE ( 4-6%)
FRESH,ALTERED;
CLINOPYROXENE ( 3-5%)
Groundmass - OLIVINE ( 5-7%)
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 30%)
OPAQUE MINERALS ( 7%)
INCLUDES ILMENITE+MAGN;
GLASS ( 15%)
Alteration - SMECTITE
Replacing: GLASS,OL (PARTLY)
Leg : 49 Top/Bottom Interval(mm): 910/ 940 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 194.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 194.93 Sect/Pc #: 1/PCE 10
ROCK = PLAG-CPX-OL MICROPHYRIC BASALT;
Texture: INTERSERTAL,MICROPHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 10%)
CLINOPYROXENE ( 5%)
ROTATING;
OLIVINE ( 3%)
Groundmass - GLASS
FRESH,RECRYSTALLLIZED;
PLAGIOCLASE
CLINOPYROXENE
OPAQUE MINERALS
INCLUDES ILMENITE+MAGN*
Leg : 49 Top/Bottom Interval(mm): 700/ 730 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 203.50 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 204.22 Sect/Pc #: 1/PCE 6 (RO
ROCK = APHYRIC BASALT
SLIGHTLY ALTERED;
NUMBER DOES NOT MATCH INTERVAL);
Texture: SUBOPHITIC,APHYRIC,COARSE-GRAINED;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
Groundmass - OLIVINE ( 3%)
ALTERED;
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 30%)
OPAQUE MINERALS ( 5%)
INCLUDES ILMENTITE+MAGN;
GLASS ( 25%)
Alteration - SMECTITE
Replacing: GLASS,OL
Leg : 49 Top/Bottom Interval(mm): 20/ 50 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 213.00 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 213.04 Sect/Pc #: 1/PCE 1
ROCK = PLAG SP MICROPHYRIC BASALT;
Texture: SP MICROPHYRIC,OPHITIC*
Phenocrysts- PLAGIOCLASE ( <1%)
ALTERED, FRESH*
Groundmass - OLIVINE ( 0.2%)
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 30%)
OPAQUE MINERALS ( 5%)
INCLUDES MAGN+ILMENITE;
GLASS ( 25%)
Alteration - SMECTITE
Replacing: PHENOS,OL
CARBONATE
Replacing: PHENOS,OL
Vesicles -
Size(mm): 0.5-2.0
Percent: 10-15
Filling: SMEC,CARB,CLAY
Leg : 49 Top/Bottom Interval(mm): 600/ 620 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 213.00 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 215.11 Sect/Pc #: 2/PCE 7
ROCK = APHYRIC BASALT;
Texture: SUBOPHITIC,APHYRIC,COARSE-GRAINED;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <1%)
ALTERED, FRESH*
Groundmass - OLIVINE ( 10%)
PLAGIOCLASE ( 35%)
LARGE,EARLY;
CLINOPYROXENE ( 30%)
OPAQUE MINERALS ( 5%)
INCLUDES MAGN+ILMENITE;
GLASS ( 20%)
Alteration - SMECTITE
Replacing: GLASS,OL (PARTLY)
Vesicles -
Percent: 1
Leg : 49 Top/Bottom Interval(mm): 1100/1150 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 213.00 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 215.63 Sect/Pc #: 2/PCE 12
ROCK = OL-PLAG SP MICROPHYRIC BASALT;
Texture: VARIOLITIC-SUBOPHITIC,SP MICROPHYRIC;
Where sampled: NEXT TO MARGIN*
Phenocrysts- PLAGIOCLASE ( <1%)
APPROX COMP AN65;
OLIVINE ( <1%)
Groundmass - OLIVINE ( 5%)
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 30%)
OPAQUE MINERALS ( 5%)
INCLUDES ILMENITE+MAGN;
GLASS ( 20%)
Alteration - SMECTITE
Replacing: OL
Vesicles -
Size(mm): 2-3
Percent: 15-20
Filling: SMEC
Leg : 49 Top/Bottom Interval(mm): 220/ 260 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 222.50 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 222.74 Sect/Pc #: 1/PCE 3
ROCK = APHYRIC BASALT;
Texture: SUBOPHITIC, APHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
PLAGIOCLASE
APPROX COMP AN72
Groundmass - OLIVINE ( 2%)
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 40%)
OPAQUE MINERALS ( 5%)
INCLUDES ILMENITE+MAGN;
GLASS ( 13%)
Alteration - SMECTITE
Replacing: PHENOS,GLASS
Vesicles -
Size(mm): 1-5
Percent: 35-40
Filling: SMEC
Leg : 49 Top/Bottom Interval(mm): 1300/1330 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 222.50 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 223.82 Sect/Pc #: 1/PCE 17
ROCK = APHYRIC BASALT;
Texture: SUBOPHITIC, APHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE
FRESH,ALTERED;
PLAGIOCLASE
APPROX COMP AN72*
Groundmass - OLIVINE ( 3%)
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 35%)
LATE 2ND GENERATION;
OPAQUE MINERALS ( 5-7%)
INCLUDE MAGN+ILMENTIE,LARGE,IN PALE BROWN GLASS;
GLASS ( 15%)
Alteration - SMECTITE
Replacing: PHENOS,GLASS
Vesicles -
Filling: SMEC
Leg : 49 Top/Bottom Interval(mm): 350/ 390 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 222.50 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 224.37 Sect/Pc #: 2/PCE 4A
ROCK = APHYRIC BASALT;
Texture: SUBOPHITIC, APHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( RARE%)
FRESH,ALTERED*
Groundmass - OLIVINE ( 3-5%)
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 35%)
OPAQUE MINERALS ( 5%)
INCLUDES ILMENITE+MAGN;
GLASS ( 15%)
Alteration - SMECTITE
Replacing: PHENOS,GLASS
Vesicles -
Filling: SMEC
Leg : 49 Top/Bottom Interval(mm): 680/ 720 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 232.00 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 232.70 Sect/Pc #: 1/PCE 8
ROCK = OL-PLAG SP MICROPHYRIC BASALT
EXT ALTERED;
Texture: VARIOLITIC TO INTERSERTAL,FINE-GRAINED,SP
MICROPHYRIC*
Phenocrysts- OLIVINE ( 3%)
FRESH,ALTERED;
PLAGIOCLASE ( 2%)
FRESH,RESORBED*
Groundmass - OLIVINE ( 5%)
PLAGIOCLASE ( 30%)
CLINOPYROXENE ( 15%)
OPAQUE MINERALS ( TR%)
INCLUDES ILMENITE+MAGN;
GLASS ( 50%)
Alteration - SMECTITE
Replacing: GLASS,OL
Vesicles -
Size(mm): <1
Percent: 5
Leg : 49 Top/Bottom Interval(mm): 540/ 560 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 241.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 242.05 Sect/Pc #: 1/PCE 5
ROCK = PLAG-OL SP MICROPHYRIC BASALT;
Texture: INTERGRANULAR,INTERSERTAL,FINE-GRAINED,SP
MICROPHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
PLAGIOCLASE ( <1%)
Groundmass - OLIVINE ( 5%)
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 30%)
OPAQUE MINERALS ( 5%)
INCLUDES ILMENITE+MAGN;
GLASS ( 20%)
Vesicles -
Size(mm): 1
Percent: 5
Leg : 49 Top/Bottom Interval(mm): 320/ 360 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 251.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 251.34 Sect/Pc #: 1/PCE 4
ROCK = OL-PLAG SP MICROPHYRIC BASALT
FRESH;
Texture: SUBOPHITIC,HOLOCRYSTALLINE,SP MICROPHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
Morphology: SKELETAL(FEW)
PLAGIOCLASE ( <1%)
ZONED,APPROX COMP AN60*
Groundmass - GLASS ( 2-3%)
FRESH,ALTERED;
OLIVINE ( 5-10%)
Size(mm): .1-1
PLAGIOCLASE ( 45%)
Size(mm): .1-1
CLINOPYROXENE ( 40%)
Size(mm): .1-1
OPAQUE MINERALS ( 1-2%)
Size(mm): .1-1 Morphology: OCTAHEDRAL
INCLUDES MAGN+ILMENITE*
Alteration - SMECTITE
Replacing: GLASS,OL
Vesicles -
Size(mm): 1
Percent: <1
Leg : 49 Top/Bottom Interval(mm): 970/1020 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 251.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 252.00 Sect/Pc #: 1/PCE 11
ROCK = PLAG-CPX-OL MICROPHYRIC BASALT;
Texture: GLASSY, MICROPHYRIC*
Phenocrysts- OLIVINE ( 2-3%)
CLINOPYROXENE ( 5-7%)
PLAGIOCLASE (10-15%)
APPROX COMP AN62*
Groundmass - GLASS ( 80%)
FRESH,ALTERED*
Alteration - SMECTITE
Replacing: GLASS
Leg : 49 Top/Bottom Interval(mm): 170/ 210 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 251.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 252.69 Sect/Pc #: 2/PCE 2
ROCK = PLAG MOD PHYRIC BASALT;
Texture: SUBOPHITIC,MOD PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 1-5%)
Size(mm): <5
APPROX COMP AN60,ZONED,RESORBED,SP DISTRIBUTED*
Groundmass - GLASS ( >5%)
FRESH;
OLIVINE ( <5%)
Size(mm): .1-1
PLAGIOCLASE ( 45%)
Size(mm): .1-1
CLINOPYROXENE ( 40%)
Size(mm): .1-1
MAGNETITE ( 2%)
Size(mm): .1-1
WELL DEVELOPED IN GLASSY REGIONS*
Vesicles -
Size(mm): 1
Percent: 1
Leg : 49 Top/Bottom Interval(mm): 690/ 710 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 251.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 254.70 Sect/Pc #: 3/PCE 7
ROCK = APHYRIC BASALT;
Texture: SUBOPHITIC,APHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE
APPROX COMP AN60;
CLINOPYROXENE ( <1%)
Size(mm): 0.5
1 CRYSTAL*
Groundmass - GLASS ( 5%)
FRESH*
OLIVINE ( 2-5%)
FRESH;
PLAGIOCLASE ( 45%)
CLINOPYROXENE ( 40%)
OPAQUE MINERALS ( 5%)
INCLUDES MAGN+ILMENITE*
Alteration - SMECTITE
Replacing: GLASS
Vesicles -
Size(mm): 1
Percent: 2-3
Filling: SMEC
BROWN*
Leg : 49 Top/Bottom Interval(mm): 100/ 150 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 260.50 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 260.63 Sect/Pc #: 1/PCE 2
ROCK = PLAG-CPX OL MICROPHYRIC BASALT;
Texture: GLASSY,MICROPHYRIC,GLOMEROPHYRIC;
Where sampled: FLOW MARGIN*
Phenocrysts- PLAGIOCLASE ( 10%)
FRESH;
CLINOPYROXENE ( 5%)
FRESH,HOURGLASS EXTINCTION;
OLIVINE ( 3%)
SOME FRESH,SOME PARTLY ALTERED*
Groundmass - GLASS ( 80%)
ALTERED,TURBID;
PLAGIOCLASE ( 1-5%)
CLINOPYROXENE ( 1-5%)
Vesicles -
Size(mm): <1
Percent: <1
Leg : 49 Top/Bottom Interval(mm): 200/ 250 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 270.00 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 270.22 Sect/Pc #: 1/PCE 2B
ROCK = APHYRIC BASALT
FRESH;
Texture: INTERGRANULAR,EQUIGRANULAR,APHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <1%)
FRESH,PART OF 1 PHENO ONLY;
OLIVINE ( 0%)
Groundmass - GLASS ( 5%)
ALTERED;
PLAGIOCLASE ( 45%)
CLINOPYROXENE ( 45%)
HOURGLASS EXTINCTION;
OLIVINE ( 0%)
Vesicles -
Size(mm): 0.4-0.7
Percent: 5-10
Filling: SMEC
Leg : 49 Top/Bottom Interval(mm): 550/ 600 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 270.00 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 272.08 Sect/Pc #: 2/PCE 5
ROCK = OL-PLAG SP MICROPHYRIC BASALT;
Texture: VARIOLITIC-INTERGRANULAR,SP MICROPHYRIC;
Where sampled: NEXT TO MARGIN*
Phenocrysts- OLIVINE ( 5-7%)
PARTLY ALTERED;
PLAGIOCLASE ( <1%)
FRESH,NORMAL ZONING,NA-RICH RIMS,SOME
GLOMEROPHYRIC AGGREGATES*
Groundmass - GLASS ( 5%)
ALTERED;
OLIVINE
PLAGIOCLASE ( 50%)
CLINOPYROXENE ( 40%)
HOURGLASS EXTINCTION*
Alteration - SMECTITE
Replacing: OL
Vesicles -
Size(mm): 0.1-0.3
Percent: 5
Leg : 49 Top/Bottom Interval(mm): 310/ 360 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 270.00 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 273.34 Sect/Pc #: 3/PCE 4
ROCK = APHYRIC BASALT;
Texture: SUBOPHITIC,INTERGRANULAR,HOLOCRYSTALLINE,
APHYRIC,EQUIGRANULAR;
Where sampled: FLOW INTERIOR*
Groundmass - GLASSY ( 3%)
ALTERED;
OLIVINE ( 0%)
PLAGIOCLASE ( 45%)
CLINOPYROXENE ( 45%)
HOURGLASS EXTINCTION,SECTOR-ZONED;
OPAQUE MINERALS ( 3-4%)
INCLUDES ILMENITE+MAGN*
Vesicles -
Size(mm): 0.1-0.3
Percent: 5-7
Filling: RECRYSTALLIZE
Shape: ROUND
Leg : 49 Top/Bottom Interval(mm): 40/ 140 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 279.50 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 279.59 Sect/Pc #: 1/PCE 1
ROCK = PLAG-CPX-OL SP MICROPHYRIC BASALT;
Texture: SUBOPHITIC,INTERGRANULAR,SP MICROPHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
PARTLY ALTERED;
CLINOPYROXENE ( <1%)
FRESH,HOURGLASS EXTINCTION;
PLAGIOCLASE ( <1%)
FRESH*
Groundmass - GLASS ( 3%)
ALTERED;
PLAGIOCLASE ( 45%)
CLINOPYROXENE ( 45%)
Alteration - SMECTITE
Replacing: GLASS
Vesicles -
Size(mm): <0.1
Percent: 1-2
Filling: GLASS
Leg : 49 Top/Bottom Interval(mm): 700/ 800 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 279.50 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 281.75 Sect/Pc #: 2/PCE 7
ROCK = PLAG SP MICROPHYRIC BASALT;
Texture: SP MICROPHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <1%)
FRESH*
Groundmass - GLASS ( 5-10%)
ALTERED;
PLAGIOCLASE ( 45%)
CLINOPYROXENE ( 45%)
HOURGLASS EXTINCTION*
Vesicles -
Size(mm): 0.1
Percent: 1
Leg : 49 Top/Bottom Interval(mm): 670/ 700 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 279.50 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 283.18 Sect/Pc #: 3/PCE 4A
ROCK = PLAG-OL SP MICROPHYRIC BASALT;
Texture: SUBOPHITIC-INTERGRANULAR,SP MICROPHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
FRESH TO ALTERED;
PLAGIOCLASE ( <1 %)
FRESH*
Groundmass - GLASS ( 3%)
ALTERED;
PLAGIOCLASE ( 45%)
CLINOPYROXENE ( 45%)
HOURGLASS EXTINCTION*
Alteration - SMECTITE
Replacing: OL
Vesicles -
Size(mm): 0.1
Percent: <1
Filling: SMEC
Leg : 49 Top/Bottom Interval(mm): 1240/1270 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 279.50 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 285.26 Sect/Pc #: 4/PCE 14
ROCK = PLAG-OL SP PHYRIC BASALT;
Texture: SUBOPHITIC-INTERGRANULAR,SP PHYRIC,COARSE-
GRAINED;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
ALTERED,POSSIBLE RELICT OL;
PLAGIOCLASE ( <1%)
Groundmass - GLASS ( 7%)
PLAGIOCLASE ( 45%)
Leg : 49 Top/Bottom Interval(mm): 220/ 290 Describer: DSDP microfilm
Hole: 412A Top of Core Depth(m) : 279.50 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 285.76 Sect/Pc #: 5/PCE 3
ROCK = PLAG-OL SP PHYRIC BASALT;
Texture: SUBOPHITIC-INTERGRANULAR,FINE-GRAINED,
SP PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
ALTERED,FRESH;
PLAGIOCLASE ( <1%)
FRESH,APPROX COMP AN60;
Groundmass - OLIVINE
RARE PSEUDOMORPHS;
GLASSY ( 7-10%)
ALTERED*
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 40%)
OPAQUE MINERALS ( 3-5%)
INCLUDES ILMENITE+MAGN*
Alteration - SMECTITE
Replacing: GLASS
Vesicles -
Size(mm): 0.1
Percent: 1
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