Leg : 59 Top/Bottom Interval(mm): 00/ 20 Describer: Scott, R.
Hole: 450 Top of Core Depth(m) : 311.50 Rock Type: IGNEOUS
Core: 34 Sample Midpoint(m) : 311.51 Sect/Pc #: 1/
ROCK = PLAG-CPX-OL PHYRIC BASALT
CLAST IN SEDIMENT (TUFFACEOUS VOLCANICLASTIC
NANNOFOSSIL CHALK BRECCIA);
Texture: PORPHYRITIC,HYALOPILITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.5
PLAGIOCLASE ( 15%)
Size(mm): 2
APPROX COMP AN66;
CLINOPYROXENE ( 8%)
Size(mm): 0.4
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): 0.05
CLINOPYROXENE ( 20%)
OPAQUE MINERALS ( 5%)
INCLUDES MAGN + ILMENITE;
GLASS ( 10%)
ALTERED TO CLAYS + ZEOLITES*
Alteration - CLAY MINERALS
Location: VESICLES, Replacing: GLASS
Location: GROUNDMASS
FAIRLY EXTENSIVE;
ZEOLITE
Location: VESICLES, Replacing: GLASS
Location: GROUNDMASS
FAIRLY EXTENSIVE;
OTHER
OXIDIZED REGIONS*
Vesicles -
Size(mm): 0.3
Percent: 5
Filling: CLAY.MIN,
Shape: NEARLY
Filling: ZEOLITES
Shape: SPHERICAL
BROWN CLAY EDGES WITH ZEOLITE CENTERS*
Leg : 59 Top/Bottom Interval(mm): 100/ 130 Describer: Mattey, D.
Hole: 450 Top of Core Depth(m) : 330.50 Rock Type: IGNEOUS
Core: 36 Sample Midpoint(m) : 333.62 Sect/Pc #: 3/PCE 1A
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,HYALOPILITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 0.2-0.5 Morphology: EUHEDRAL
PSEUDOMORPHS (IDDINGSITE + SMEC);
PLAGIOCLASE ( 10%)
Size(mm): 0.5-4 Morphology: EUHEDRAL,EQUANT,LATHS
GLOMEROPHYRIC (LARGER XTLS),UNZONED,GLASS
INCLUSIONS,TWO GENERATIONS: 2-4 MM WITH APPROX
COMP AN60-80 (EQUANT) AND 0.5-1.5 MM WITH APPROX
COMP AN40-60 (LATHS)*
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): 0.2-0.4 Morphology: QUENCH,SKELETAL
APPROX COMP AN50;
CLINOPYROXENE ( 5%)
Size(mm): 0.2
RARE SUBOPHITIC CLOTS;
OPAQUE MINERALS ( TR%)
INCLUDES MAGN + ILMENITE,SCATTERED GRANULES;
GLASS ( 55%)
DEVITRIFIED,<2% ALTERED*
Alteration - CHLOROPHAEITE
Location: VESICLES
CLAY MINERALS ( 5%)
Location: VESICLES Replacing: OL PHENOS,GLASS
SMEC REPLACES OL PHENOS;
IDDINGSITE
Replacing: OL PHENOS
Vesicles -
Size(mm): 0.1-0.5
Percent: 2
Filling: CHLOROPHAEITE,
Shape: SPHERICAL
Filling: CLAY.MIN
Leg : 59 Top/Bottom Interval(mm): 310/ 350 Describer: Mattey, D.
Hole: 450 Top of Core Depth(m) : 330.50 Rock Type: IGNEOUS
Core: 36 Sample Midpoint(m) : 333.83 Sect/Pc #: 3/PCE 1D
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,SPHERULITIC-HYALOPILITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.2-0.5 Morphology: SKELETAL,EUHEDRAL
PSEUDOMORPHED BY IDDINGSITE + SMEC
PLAGIOCLASE ( 7%)
Size(mm): 0.5-2
APPROX COMP AN70,ZONED,PARTLY REPLACED BY CALCITE
+ SMEC*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): 0.1-0.3 Morphology: SKELETAL MICROLITES
CLINOPYROXENE ( TR%)
Morphology: GRANULAR-SUBPOIKILITIC
GLASS ( 70%)
CONTAINS FRAGMENT OF VITRIC TUFF ZENOLITH
(5-8 MM X 2 MM)*
Alteration - CLAY MINERALS
Replacing: OL PHENOS,PLAG PHENOS,
Replacing: GLASS
REPLACES MAFICS,OL PHENOS + PLAG PHENOS REPLACED
PARTLY BY SMEC;
IDDINGSITE
Replacing: OL PHENOS
CALCITE
Replacing: PLAG PHENOS
Vesicles -
Percent: TR
VERY RARE*
Leg : 59 Top/Bottom Interval(mm): 1390/1450 Describer: Mattey, D.
Hole: 450 Top of Core Depth(m) : 330.50 Rock Type: IGNEOUS
Core: 36 Sample Midpoint(m) : 334.92 Sect/Pc #: 3/PCE 14B
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPYRITIC,HYALOPILITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( TR%)
Size(mm): 0.2 Morphology: SUBHEDRAL
REPLACED BY CLAY MINS;
PLAGIOCLASE ( 15%)
Size(mm): 2-6 Morphology: EUHEDRAL
APPROX COMP AN60-70,LARGE EUHEDRAL ZONED XTLS*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): 0.1-0.3 Morphology: SKELETAL MICROLITES
FLOW ALIGNED;
CLINOPYROXENE ( TR%)
OPAQUE MINERALS ( TR%)
INCLUDES MAGN + ILMENITE;
GLASS ( 45%)
DEVITRIFIED,PARTLY ALTERED*
Alteration - CLAY MINERALS ( <10%)
Replacing: GLASS,OL PHENOS
Vesicles -
Size(mm): 0.2-0.5
Percent: 2
Filling: SMEC,CALCITE,ZE
Shape: OLITE
SMEC IS GREEN*
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