Leg : 58 Top/Bottom Interval(mm): 1150/ 0 Describer: Nisterenko, G.
Hole: 442B Top of Core Depth(m) : 286.50 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 290.65 Sect/Pc #: 3/PCE 19
ROCK = APHYRIC BASALT;
Texture: INTERGRANULAR-INTERSERTAL, APHYRIC;
Where sampled: FLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): 0.1-3.0 Morphology: SUBHEDRAL
APPROX COMP AN65;
CLINOPYROXENE ( 18%)
Size(mm): 0.1-0.5 Morphology: EUHEDRAL
GLASS ( 20%)
Alteration - CARBONATE ( 1%)
Location: VESICLES
CLAY MINERALS ( 1%)
Location: VESICLES
Vesicles -
Size(mm): 0.05-0.1
Percent: 30
Filling: CARB,CLAY.MIN
Shape: ROUND,
Shape: IRREGULAR
Leg : 58 Top/Bottom Interval(mm): 540/ 560 Describer: Nisterenko, G.
Hole: 442B Top of Core Depth(m) : 286.50 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 291.55 Sect/Pc #: 4/PCE 5A
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: INTERSERTAL, SPARSELY PORPHYRITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): 0.4-1.5 Morphology: EUHEDRAL
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): 0.05-1.0 Morphology: SUBHEDRAL
APPROX COMP AN60;
CLINOPYROXENE ( 20%)
Size(mm): 0.03-0.1 Morphology: ANHEDRAL
AUGITE COMP;
COMBINATION ( 20%)
INCLUDES GLASS+MAGN,IK UNCERTAIN FOR MAGN*
Alteration - CARBONATE ( 1%)
Location: VESICLES
CLAY MINERALS ( 1%)
Location: VESICLES
Vesicles -
Percent: 25
Filling: CARB,CLAY.MINS
Shape: ROUND,
Shape: IRREGULAR
Leg : 58 Top/Bottom Interval(mm): 1170/1190 Describer: Nisterenko, G.
Hole: 442B Top of Core Depth(m) : 296.00 Rock Type: IGNEOUS
Core: 4 Sample Midpoint(m) : 297.18 Sect/Pc #: 1/PCE 19
ROCK = APHYRIC BASALT;
Texture: INTERSERTAL, APHYRIC;
Where sampled: FLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): 0.1-0.5 Morphology: SUBHEDRAL
APPROX COMP AN60;
CLINOPYROXENE ( 20%)
Size(mm): 0.03-0.1 Morphology: ANHEDRAL
AUGITE COMP;
GLASS ( 20%)
POSSIBILITY OF INTERSTITIAL MAGN*
Alteration - CARBONATE ( 1%)
Location: VESICLES
Vesicles -
Size(mm): 0.01-0.1
Percent: 28
Filling: CARB
Leg : 58 Top/Bottom Interval(mm): 30/ 50 Describer: Nisterenko, G.
Hole: 442B Top of Core Depth(m) : 334.00 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 338.54 Sect/Pc #: 4/PCE 1A
ROCK = PLAG-CPX PHYRIC BASALT;
Texture: INTERSERTAL,OPHITIC, PORPHYRITIC
PARTLY OPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 27%)
Size(mm): 1-5 Morphology: EUHEDRAL,SUBHEDRAL
APPROX COMP AN70,PARTLY SKELETAL;
CLINOPYROXENE ( 20%)
Size(mm): 1-5 Morphology: ANHEDRAL
AUGITE COMP*
Groundmass - MAGNETITE ( 1-2%)
Size(mm): 0.7-1 Morphology: SKELETAL,ISOMETRICAL
MAINLY IN GROUNDMASS;
GLASS ( 50%)
Alteration - CARBONATE ( TR%)
Location: VESICLES
COMBINATION ( 50%)
Location: VESICLES,
Location: GROUNDMASS
INCLUDES ZEOLITES+CHLORITE*
Vesicles -
Size(mm): 0.1-0.5
Percent: 1-2
Filling: CARB,ZEOLITES,
Shape: ROUND
Filling: CHLORITE
Leg : 58 Top/Bottom Interval(mm): 840/ 0 Describer: Nisterenko, G.
Hole: 442B Top of Core Depth(m) : 334.00 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 342.34 Sect/Pc #: 6/PCE 3
ROCK = APHYRIC BASALT;
Texture: APHYRIC,SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): 0.5-5 Morphology: EUHEDRAL,SUBHEDRAL
APPROX COMP AN60;
CLINOPYROXENE ( 25%)
Size(mm): 1-4 Morphology: ANHEDRAL
AUGITIC COMPOSITION;
MAGNETITE ( 1%)
Size(mm): 0.1-0.6
Alteration - COMBINATION ( 30%)
Location: GROUNDMASS, Replacing: GROUNDMASS
Location: VESICLES
INCLUDES CHLORITE+ZEOLITES,CHLORITE REPLACING
GROUNDMASS*
Vesicles -
Size(mm): 0.7-6.0
Percent: 5
Filling: ZEOL,CHLORITE
Shape: ROUND
CHLORITE AND ZEOLITES ON WALLS AND RIMS*
Leg : 58 Top/Bottom Interval(mm): 1070/1090 Describer: Nisterenko, G.
Hole: 442B Top of Core Depth(m) : 334.00 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 344.08 Sect/Pc #: 7/PCE 12A
ROCK = APHYRIC BASALT;
Texture: OPHITIC, APHYRIC;
Where sampled: FLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): 1-4 Morphology: SUBHEDRAL,SKELETAL
APPROX COMP AN60;
CLINOPYROXENE ( 35%)
Size(mm): 1-3 Morphology: ANHEDRAL
AUGITE COMP,EXTINCTION ANGLE = 50;
MAGNETITE ( 1%)
Size(mm): 0.1-0.5 Morphology: SKELETAL,RECTANGULAR
Alteration - COMBINATION ( 10%)
Location: VESICLES, Replacing: GROUNDMASS
Location: GROUNDMASS
INCLUDES ZEOL+CHLOR,PARTLY COLORED BY FE.HYDRRX*
Vesicles -
Size(mm): 1-3
Percent: 10
Filling: ZEOLITES,
Shape: ROUND
Filling: CHLORITE
Leg : 58 Top/Bottom Interval(mm): 240/ 260 Describer: Nisterenko, G.
Hole: 442B Top of Core Depth(m) : 343.50 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 343.75 Sect/Pc #: 1/PCE 4
ROCK = PLAG-CPX PHYRIC BASALT;
Texture: GLOMEROPHYRIC,SUBOPHITIC,INTERSERTAL,
Piece #: HYRITIC;
Where sampled: UPPER PART OF FLOW*
Phenocrysts- PLAGIOCLASE ( 50%)
Size(mm): 0.3-3 Morphology: SUBHEDRAL
OCCASIONAL LIGHT ZONATION,APPROX COMP AN58;
CLINOPYROXENE ( 20%)
Size(mm): 0.5-2 Morphology: EUHEDRAL
AUGITE COMP, 2V 50*
Alteration - COMBINATION ( 25%)
Location: GROUNDMASS Replacing: GROUNDMASS,VESICLES
INCLUDES CLAY.MIN+CHLORITE+ZEOLITES*
Vesicles -
Size(mm): 0.1-1.5
Percent: 3
Filling: CLAYS,ZEOLITES,
Filling: CHLORITE
Leg : 58 Top/Bottom Interval(mm): 1030/1050 Describer: Nisterenko, G.
Hole: 442B Top of Core Depth(m) : 343.50 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 344.54 Sect/Pc #: 1/PCE 6D
ROCK = APHYRIC BASALT;
Texture: INTERSERTAL, APHYRIC;
Where sampled: FLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): 0.2-1 Morphology: SUBHEDRAL,ACICULAR
APPROX COMP AN60;
CLINOPYROXENE ( 25%)
Size(mm): 0.2-3 Morphology: ANHEDRAL
AUGITE COMP;
MAGNETITE ( <1%)
Size(mm): 0.04-0.08
COMBINATION ( 50%)
Morphology: MICROLITIC
INCLUDES GLASS+PLAG+PYX+MAGN*
Alteration - CARBONATE ( 3%)
Location: VESICLES
CLAY MINERALS ( 2%)
Location: VESICLES
Vesicles -
Size(mm): 0.2-1.0
Percent: 5
Filling: CARBS,CLAY.MINS
PARTLY FILLED*
Leg : 58 Top/Bottom Interval(mm): 730/ 750 Describer: Nisterenko, G.
Hole: 442B Top of Core Depth(m) : 343.50 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 345.74 Sect/Pc #: 2/PCE 7
ROCK = PLAG MOD PHYRIC BASALT;
Texture: INTERSERTAL, MODERATELY PORPHYRITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 10%)
Size(mm): 0.4-1 Morphology: NEEDLES
APPROX COMP AN60(?)*
Groundmass - COMBINATION ( 50%)
Morphology: MICROLITIC
INCLUDES GLASS+PLAG+PYX*
Vesicles -
Size(mm): 0.1-1.0
Percent: 40
Filling: NONE
Shape: ROUND
Leg : 58 Top/Bottom Interval(mm): 320/ 340 Describer: Nisterenko, G.
Hole: 442B Top of Core Depth(m) : 343.50 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 346.83 Sect/Pc #: 3/PCE 1C
ROCK = APHYRIC BASALT;
Texture: SUBOPHITIC-INTERSERTAL, APHYRIC;
Where sampled: FLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): 0.5-2 Morphology: NEEDLES,LATHS
PARTLY NEEDLES,APPROX COMP AN68;
CLINOPYROXENE ( 20%)
Size(mm): 0.2-1.5 Morphology: SUBHEDRAL,EUHEDRAL
AUGITE COMP;
COMBINATION ( 45%)
Morphology: MICROLITIC
INCLUDES GLASS+PLAG+PYX+MAGN, MICROLITES OF
PLAG+PYX+MAGN*
Alteration - CARBONATE ( 1%)
Replacing: VESICLES
0.2-1.5MM IN SIZE*
Vesicles -
Size(mm): 0.2-2.0
Percent: 3
Filling: CALCITE
PARTLY FILLED BY CALCITE*
Leg : 58 Top/Bottom Interval(mm): 930/ 950 Describer: Marsh, N.
Hole: 442B Top of Core Depth(m) : 353.00 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 353.94 Sect/Pc #: 1/PCE 17
ROCK = APHYRIC BASALT;
Texture: GLASSY, APHYRIC;
Where sampled: GLASSY MARGIN*
Groundmass - PLAGIOCLASE ( 10%)
Size(mm): 0.02-0.2 Morphology: LATHS,ACICULAR
MICROLITES;
GLASS ( 70%)
MICROCRYST GROUNDMASS ( 20%)
CRYPTOCRYSTALLINE MATERIAL*
Leg : 58 Top/Bottom Interval(mm): 931/ 951 Describer: Marsh, N.
Hole: 442B Top of Core Depth(m) : 353.00 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 353.94 Sect/Pc #: 1/PCE 17
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE ( 0.5%)
Size(mm): 0.2-1 Morphology: LATHS
APPROX COMP AN58*
Groundmass - MICROCRYST GROUNDMASS ( 68.5%)
CRYPTOCRYSTALLINE MATRIX*
Alteration - CLAY MINERALS ( 1%)
Location: VESICLES
Vesicles -
Size(mm): 0.02-1
Percent: 20
Filling: CLAY.MINS
Leg : 58 Top/Bottom Interval(mm): 600/ 620 Describer: Marsh, N.
Hole: 442B Top of Core Depth(m) : 362.50 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 363.11 Sect/Pc #: 1/PCE 10A
ROCK = APHYRIC BASALT;
Texture: INTERSERTAL, APHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- SPINEL ( 0.1%)
1 PIECE,ROUNDED TRIANGLE,RED-BROWN*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): 0.2-1 Morphology: ACICULAR
SOME WITH PLUMOSE TEXTURE(PYX FEATHERS);
MICROCRYST GROUNDMASS ( 39%)
CRYPTOCRYSTALLINE MATRIX*
Alteration - CLAY MINERALS ( 1%)
Location: LINE FRACTURE Replacing: MICROXLN
CLAY LINES FRACTURE AND REPLACES MICROXLN*
Vesicles -
Size(mm): 0.1-0.5
Percent: 40
Leg : 58 Top/Bottom Interval(mm): 1270/1290 Describer: Marsh, N.
Hole: 442B Top of Core Depth(m) : 362.50 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 365.28 Sect/Pc #: 2/PCE 16
ROCK = APHYRIC BASALT;
Texture: INTERSERTAL, APHYRIC;
Where sampled: FLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 25%)
Size(mm): 0.02-1 Morphology: LATHS
ELONGATED LATHS,APPROX COMP AN62;
CLINOPYROXENE ( 10%)
Size(mm): 0.02-0.5 Morphology: ACICULAR
MAGNETITE ( 2%)
Size(mm): <0.02 Morphology: GRANULAR
MICROCRYST GROUNDMASS ( 28%)
Vesicles -
Size(mm): 0.05-0.5
Percent: 35
Shape: ROUNDED
Leg : 58 Top/Bottom Interval(mm): 180/ 200 Describer: Marsh, N.
Hole: 442B Top of Core Depth(m) : 362.50 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 365.69 Sect/Pc #: 3/PCE 3
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 0.3-1.2 Morphology: EUHEDRAL,LATHS
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): 0.2-0.5 Morphology: ACICULAR LATHS
MICROLITES,APPROX COMP AN69;
MAGNETITE ( 0.5%)
Size(mm): 0.01-0.02 Morphology: GRANULAR
MICROCRYST GROUNDMASS
CRYPTOCRYSTALLINE MATRIX*
Alteration - CLAY MINERALS ( 1%)
Location: VESICLES
LINING VESICLES*
Vesicles -
Size(mm): 0.02-1.0
Percent: 35
Filling: CLAY.MIN
Leg : 58 Top/Bottom Interval(mm): 600/ 630 Describer: Marsh, N.
Hole: 442B Top of Core Depth(m) : 381.50 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 382.12 Sect/Pc #: 1/PCE 9
ROCK = APHYRIC BASALT;
Texture: INTERSERTAL, APHYRIC;
Where sampled: PILLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 25%)
Size(mm): 0.2-1 Morphology: LATHS
APPROX COMP AN59;
CLINOPYROXENE ( 25%)
Size(mm): 0.1-0.5 Morphology: ANHEDRAL
MAGNETITE ( 0.1%)
Size(mm): <0.02 Morphology: GRANULAR
MICROCRYST GROUNDMASS ( 34.5%)
CRYPTOCRYSTALLINE MATRIX*
Vesicles -
Size(mm): 0.2-0.5
Percent: 15
Leg : 58 Top/Bottom Interval(mm): 20/ 40 Describer: Marsh, N.
Hole: 442B Top of Core Depth(m) : 381.50 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 384.53 Sect/Pc #: 3/PCE 1
ROCK = APHYRIC BASALT;
Texture: INTERSERTAL, APHYRIC;
Where sampled: PILLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 33%)
Size(mm): 0.1-1 Morphology: ACICULAR,MICROLITES
APPROX COMP AN60;
MAGNETITE ( TR%)
VERY FINE GRAINED;
MICROCRYST GROUNDMASS ( 33%)
CRYPTOCRYSTALLINE MATRIX*
Alteration - CLAY MINERALS ( 1%)
Replacing: MICROXLN
Vesicles -
Size(mm): 0.1-0.4
Percent: 33
Leg : 58 Top/Bottom Interval(mm): 340/ 360 Describer: Marsh, N.
Hole: 442B Top of Core Depth(m) : 391.00 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 392.85 Sect/Pc #: 2/PCE 5
ROCK = APHYRIC BASALT;
Texture: INTERSERTAL, APHYRIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- PLAGIOCLASE
Morphology: LATH
ONLY ONE,0.5X0.2MM;
SPINEL
Size(mm): <0.02 Morphology: EUHEDRAL
ODD GRAINS IN PYX*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): 0.1-0.5 Morphology: LATHS
ACICULAR OR ELONGATED LATHS,APPROX COMP AN59;
CLINOPYROXENE ( 10%)
Size(mm): 0.1-0.3 Morphology: ANHEDRAL
POORLY DEVELOPED;
MAGNETITE
Size(mm): <0.01
DISSEMINATED IN ODD AREAS;
MICROCRYST GROUNDMASS ( 20%)
CRYPTOCRYSTALLINE MATRIX;
COMBINATION ( 20%)
INCLUDES GLASS+PLAG, GLASSY SPHERES WITH PLAG
MICROLITES*
Vesicles -
Size(mm): 0.02-0.5
Percent: 30
Leg : 58 Top/Bottom Interval(mm): 680/ 700 Describer: Marsh, N.
Hole: 442B Top of Core Depth(m) : 400.50 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 401.19 Sect/Pc #: 1/PCE 11
ROCK = APHYRIC BASALT;
Texture: INTERSERTAL, APHYRIC;
Where sampled: PILLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): 0.05-0.5 Morphology: LATHS
ACICULAR OR ELONGATED LATHS,APPROX COMP AN55;
CLINOPYROXENE ( 15%)
Size(mm): 0.05-0.4
MAGNETITE ( TR%)
Size(mm): <0.02
MICROCRYST GROUNDMASS ( 30%)
Vesicles -
Size(mm): 0.1-1.5
Percent: 35
Leg : 58 Top/Bottom Interval(mm): 30/ 50 Describer: Marsh, N.
Hole: 442B Top of Core Depth(m) : 426.50 Rock Type: IGNEOUS
Core: 18 Sample Midpoint(m) : 426.54 Sect/Pc #: 1/PCE 2
ROCK = PLAG-CPX SPARSELY PHYRIC BASALT;
Texture: INTERSERTAL, SPARSELY PORPHYRITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- PLAGIOCLASE
Size(mm): 0.5X0.2 Morphology: LATHS
ZONED;
CLINOPYROXENE
Size(mm): 0.2X0.3 Morphology: SUBHEDRAL
HOUR GLASS ZONED*
Groundmass - PLAGIOCLASE ( 25%)
Size(mm): 0.1-1 Morphology: LATHS
ACICULAR OR ELONGATED LATHS;
CLINOPYROXENE ( 25%)
Size(mm): 0.01-0.1 Morphology: ANHEDRAL
MAINLY FINELY CRYSTALLINE;
MAGNETITE ( 0.5%)
Size(mm): 0.01 Morphology: GRANULAR
MICROCRYST GROUNDMASS ( 9.5%)
CRYPTOCRYSTALLINE MATRIX*
Leg : 58 Top/Bottom Interval(mm): 430/ 450 Describer: Nisterenko, G.
Hole: 442B Top of Core Depth(m) : 436.00 Rock Type: IGNEOUS
Core: 19 Sample Midpoint(m) : 436.44 Sect/Pc #: 1/PCE 6
ROCK = APHYRIC BASALT;
Texture: INTERGRANULAR-INTERSERTAL, APHYRIC;
Where sampled: PILLOW INTERIOR
TOP OF LAVA FLOW*
Groundmass - PLAGIOCLASE ( 25%)
Size(mm): 0.2-1.5 Morphology: EUHEDRAL,SUBHEDRAL
APPROX COMP AN 64;
CLINOPYROXENE ( 30%)
Size(mm): 0.03-0.5 Morphology: EUHEDRAL
AUGITE COMP;
COMBINATION ( 20%)
INCLUDES GLASS+MAGN IN GROUNDMASS AND AROUND
VESICLES*
Alteration - ZEOLITE ( RARE%)
VERY FEW*
Vesicles -
Size(mm): 0.1-2.0
Percent: 25
Shape: ROUND,
Shape: IRREGULAR
Leg : 58 Top/Bottom Interval(mm): 620/ 640 Describer: Nisterenko, G.
Hole: 442B Top of Core Depth(m) : 436.00 Rock Type: IGNEOUS
Core: 19 Sample Midpoint(m) : 438.13 Sect/Pc #: 2/PCE 9
ROCK = PLAG-CPX MOD PHYRIC BASALT;
Texture: VARIOLITIC, MODERATELY PORPHYRITIC;
Where sampled: GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE ( 3%)
Size(mm): 0.7-0.1 Morphology: EUHEDRAL
APPROX COMP AN60;
CLINOPYROXENE ( 1%)
Size(mm): 0.1-0.5 Morphology: SUBHEDRAL
AUGITE COMP*
Groundmass - PLAGIOCLASE
Morphology: MICROLITES
CLINOPYROXENE
Morphology: MICROLITES
Vesicles -
Size(mm): 0-1.5
Percent: 30
Filling: NONE
Shape: ROUND,
Shape: IRREGULAR
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