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Core data from the Ocean Drilling Program legs 101-129
leg : 104 section: 03 unit/subunit : 0003
hole: 0642E top int: 0 cm observer code: DU
core: 002W pieces : 1-6C.
rock name: CONGLOMERATE, PARTLY OXIDIZED, SUBROUNDED TO ROUNDED
PEBBLES.
contact : see comments
***** MAIN COMMENTS *****
Pebbles are < 30 cm in size. Components: vesicular, fine-grianed basalt,
aphyric, sparsely vesicular, phyric basalt; pale green coarse-grained
basalt, fine-grained basalt with chilled margin and pockets filled by pale
green tuff; carbonaceous tuff, light brown basaltic lapillistone;
quartzofeldspar biotite gneiss; slate, biotite rich; fine-grained
sediments. Unit S3.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0003
hole: 0642E top int: 0 cm observer code: DU
core: 003R pieces : 1-31.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 624E-2W-3. Unit S3.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0003
hole: 0642E top int: 0 cm observer code: DU
core: 004R pieces : 1-2.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-2W-3. Unit S3.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0004
hole: 0642E top int: 31 cm observer code: DU
core: 004R pieces : All
rock name: TUFF, LAPILLI TUFF, AND LAPILLISTONE.
contact : see comments
***** MAIN COMMENTS *****
Color is dark red to dark red brown, with basaltic scoria, red brown tuff,
brownish yellow pumice, feldspar, coarse-grained basalt. UnitS4.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0004
hole: 0642E top int: 0 cm observer code: DU
core: 005R pieces : 1-8E.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-4R-1. Unit S4.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 02 unit/subunit : 0004
hole: 0642E top int: 0 cm observer code: DU
core: 005R pieces : 1-5B.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-4R-1. Unit S4.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 02 unit/subunit : 0001
hole: 0642E top int: 46 cm observer code: DU
core: 005R pieces : 6-9.
rock name: HIGHLY ALTERED, SPARSELY PLAGIOCLASE, PHYRIC GRAY GREEN
BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
Moderately vesiclar, but locally nonvesicular, coated with yellow limonite
and filled with red clay. Hairline cracks throughout. Unit F1.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 03 unit/subunit : 0001
hole: 0642E top int: 0 cm observer code: DU
core: 005R pieces : 1-9.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-5R-2. Unit F1.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 03 unit/subunit : 0005
hole: 0642E top int: 129 cm observer code: DU
core: 005R pieces : All
rock name: FINE-GRAINED BASALTIC VITRIC TUFF.
contact : see comments
***** MAIN COMMENTS *****
Dark red brown to yellowish red brown fine-grained basaltic vitric tuff,
median clast size <0.1 mm, containing angular to round fragments. Few
subunits with gradational contacts, and horizontal bedding. Unit S5.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0005
hole: 0642E top int: 0 cm observer code: DU
core: 006R pieces : All
rock name: UNIDENTIFIED DRILLING RUBBLE
contact : see comments
***** MAIN COMMENTS *****
Unit S5.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0002
hole: 0642E top int: 5 cm observer code: DU
core: 007R pieces : All
rock name: FINE-GRAINED, APHYRIC, BLACK TO DARK GRAY BASALTIC FLOW.
contact : see comments
***** MAIN COMMENTS *****
Highly vesicular and strongly altered groundmass, with vesicles unfilled
but coated with white (zeolites?) and/or with pale green smectite
(celadonite?). Unit F2.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 02 unit/subunit : 0002
hole: 0642E top int: 0 cm observer code: DU
core: 007R pieces : 1-23.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-7R-1. Unit F2.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 02 unit/subunit : 0006
hole: 0642E top int: 111 cm observer code: DU
core: 007R pieces : 19.
rock name: UNIFORMLY DARK RED BROWN, FINE-GRAINED TUFF.
contact : see comments
***** MAIN COMMENTS *****
Top and bottom contacts not recovered. Unit S6.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 02 unit/subunit : 0003
hole: 0642E top int: 123 cm observer code: DU
core: 007R pieces : 21-23.
rock name: FINE-GRAINED, APHYRIC, BLACK TO DARK GRAY BASALTIC FLOW.
contact : see comments
***** MAIN COMMENTS *****
As Unit F2, except vesicles have only beige smectite(?) or limonite-coated
rims, and alteration to base to pale gray green color. Unit F3.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 03 unit/subunit : 0003
hole: 0642E top int: 0 cm observer code: DU
core: 007R pieces : 1-6.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-7R-2. Unit F3.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0003
hole: 0642E top int: 0 cm observer code: DU
core: 008R pieces : 1-2.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-7R-2.. Unit F3.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: CC unit/subunit : 0003
hole: 0642E top int: 0 cm observer code: DU
core: 008R pieces : 1.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-7R-2. Unit F3.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0003
hole: 0642E top int: 0 cm observer code: DU
core: 009R pieces : 1A-2.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-7R-2, Unit F3.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0001
hole: 0642E top int: 22 cm observer code: DU
core: 009R pieces : 3-9B.
rock name: FINE-GRAINED, SPARSELY PHYRIC, DARK GRAY BASALT.
contact : see comments
***** MAIN COMMENTS *****
Moderately to sparsely vesicular. Vesicles filled with calcite and dark
green smectite rims, or open. Some light gray green smectite and fine dark
green smectite alteration in groundmass. Native copper present in 9R-1,
Piece 5b. 10R-1, Piece 1, contains smectite-rich zone that may be a chilled
margin or zone of tectonic shear. Unit D1.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 02 unit/subunit : 0001
hole: 0642E top int: 0 cm observer code: DU
core: 009R pieces : 1-10.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-9R-2, Unit D1.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0001
hole: 0642E top int: 0 cm observer code: DU
core: 010R pieces : 1.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-9R-1, Unit D1.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0002
hole: 0642E top int: 4 cm observer code: DU
core: 010R pieces : 2-18.
rock name: FINE-GRAINED, APHYRIC, DARK GRAY BASALT.
contact : see comments
***** MAIN COMMENTS *****
Moderately vesicular, with vesicles filled by calcite, or rimmed by dark
green or dark brown smectite. Iddingsite pseudomorphs after olivine
locally glomeroporphyritic. 10R-1, Piece 2, contains smectite-rich zones
that may be a chilled margin or zone of tectonic shear.Unit D2.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0007
hole: 0642E top int: 140 cm observer code: DU
core: 010R pieces : 19-21.
rock name: HIGHLY ALTERED, CRYSTAL-BEARING TUFF.
contact : see comments
***** MAIN COMMENTS *****
Dark olive gray, possible tectonic, at contact to overlying unit; pale
brown, highly fragmented away from contact. Unit S7.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 02 unit/subunit : 0003
hole: 0642E top int: 0 cm observer code: DU
core: 010R pieces : 1-23.
rock name: FINE-GRAINED, SPARSELY OLIVINE PHYRIC BASALT.
contact : see comments
***** MAIN COMMENTS *****
Very fine-grained smectite-rich zone at 8-10 cm , possibly an inclined
chilled margin or tectonic shear zone. Sparsely vesicular, with green
smectite and calcite fillings. Subparallel, dark streaking (flow fabric)
throughout unit. Unit D3.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 03 unit/subunit : 0004
hole: 0642E top int: 0 cm observer code: DU
core: 010R pieces : 1-12.
rock name: FINE-GRAINED, APHYRIC TO SPARSELY PHYRIC GRAY BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
Highly to sparsely vesicular with vesicles filled with calcite and dark
green smectite. Some alternation to smectite(?) along fractures. Native
copper blebs within vesicle fillings. Some weak development of streaky
lamination. Unit F4.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0004
hole: 0642E top int: 0 cm observer code: DU
core: 011R pieces : 1-15E.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-10R-3, Unit F4.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 02 unit/subunit : 0004
hole: 0642E top int: 0 cm observer code: DU
core: 011R pieces : 1A-2H.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-10R-3, Unit F4.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0004
hole: 0642E top int: 0 cm observer code: DU
core: 012R pieces : All
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-10R-3, Unit F4.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0005
hole: 0642E top int: 20 cm observer code: DU
core: 012R pieces : All
rock name: VERY FINE-GRAINED, APHYRIC BLACK BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
Locally massive, but generally brecciated and highly altered to clay
minerals. Unit F5.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0008
hole: 0642E top int: 68 cm observer code: DU
core: 012R pieces : All
rock name: DARK BROWN TUFF LAYER WITH POCKET FILLINGS OF VITRIC TUFFS
IN THE UNDERLAYING BRECCIA.
contact : see comments
***** MAIN COMMENTS *****
Contains cuneiform shards replaced by pale to dark green secondary
minerals. Unit S8.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0006
hole: 0642E top int: 69 cm observer code: DU
core: 012R pieces : All
rock name: FINE-GRAINED, GLASSY, APHYRIC, BLACK BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
Moderately vesicular, filled with dark green smectite with subordinate
calcite. Unit F6.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0007
hole: 0642E top int: 0 cm observer code: DU
core: 013R pieces : 1-13E.
rock name: FINE-GRAINED, APHYRIC TO SPARSELY PHYRIC, GRAY BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
Moderate vesicularity, vesicles filled with dark green smectite, some
calcite, some coalescence of vesicles to irregular shapes. Euhedral
plagioclase phenocrysts. Some local subhorizontal streaking (flow fabric)
defined by smectite-rich bands.Unit F7.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 02 unit/subunit : 0007
hole: 0642E top int: 0 cm observer code: DU
core: 013R pieces : 1-10.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-13R-1, Unit 7.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0007
hole: 0642E top int: 0 cm observer code: DU
core: 014R pieces : 1-13.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-13R-1, Unit 7.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0009
hole: 0642E top int: 80 cm observer code: DU
core: 014R pieces : 14A-16.
rock name: DUSKY GREEN TO BROWN VITRIC TUFF.
contact : see comments
***** MAIN COMMENTS *****
Contains fresh and altered vesicular and pumiceous shards. Unit S9.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0008
hole: 0642E top int: 107 cm observer code: DU
core: 014R pieces : 17-19.
rock name: FINE- TO MEDIUM-GRAINED, APHYRIC TO SPARSELY PHYRIC, GRAY,
BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
As Unit F7, except that the plagioclase phenocrysts become more common
lower in the flow, along with an increase in grain size. Unit F8.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0009
hole: 0642E top int: 136 cm observer code: DU
core: 014R pieces : 20-21.
rock name: MEDIUM-GRAINED, SPARSELY PHYRIC, GRAY BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
Sparsely vesicular with smectite coatings and some calcite fills.
Plagioclase and olivine phenocrysts form 1%-2% and are <1.0 mm in diameter.
Unit F9.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0009
hole: 0642E top int: 0 cm observer code: DU
core: 015R pieces : 1-15.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-14R-1, Unit 9.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 02 unit/subunit : 0011
hole: 0642E top int: 93 cm observer code: DU
core: 015R pieces : 12A-13.
rock name: MEDIUM-GRAINED, PLAGIOCLASE PHYRIC, GRAY BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
Nonvesicular and has light gray to white feldspar phenocrysts. Minor
bleaching of groundmass, some fracturing filled with dark green smectite
and calcite. Common dark green smectite patch alteration. Unit F11.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 03 unit/subunit : 0011
hole: 0642E top int: 0 cm observer code: DU
core: 015R pieces : 1-4.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-15R-2, Unit 11.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 04 unit/subunit : 0011
hole: 0642E top int: 0 cm observer code: DU
core: 015R pieces : 1-7.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-15R-2, Unit 11.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 04 unit/subunit : 0012
hole: 0642E top int: 106 cm observer code: DU
core: 015R pieces : 8-10.
rock name: MEDIUM-GRAINED, MODERATELY OLIVINE PHYRIC, GRAY BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
0.5-0.75 mm diameter olivine phenocrysts, iddingsitized and smectite-rich.
Highly vesicular at flow top breccia, with lower vesicles containing
calcite and some green smectite. Smectite patch alteration throughout
groundmass. Slightly more vesicular at flow base. Unit F12.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 05 unit/subunit : 0012
hole: 0642E top int: 0 cm observer code: DU
core: 015R pieces : 1-3.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-15R-4, Unit 12.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 05 unit/subunit : 0013
hole: 0642E top int: 45 cm observer code: DU
core: 015R pieces : 4-11.
rock name: MEDIUM- TO FINE-GRAINED, MODERATELY PLAGIOCLASE + OLIVINE
PHYRIC BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
Vesicular throughout, almost all vesicles open but some are filled with
calcite and thin dark green smectite rimsUnit F13.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 05 unit/subunit : 0015
hole: 0642E top int: 122 cm observer code: DU
core: 015R pieces : 10-11.
rock name: MEDIUM-GRAINED, APHYRIC, GRAY BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
Weakly reddened, highly vesicular near flow top, moderate to sparse below.
Calcite, zeolite, green smectite fills in vesicles. Dark green smectite
spotting or irregular patches throughout the groundmass. Unit F15.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0015
hole: 0642E top int: 0 cm observer code: DU
core: 016R pieces : 1-8B.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-15R-5, Unit 15.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 02 unit/subunit : 0015
hole: 0642E top int: 0 cm observer code: DU
core: 016R pieces : 1-10.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-15R-5, Unit 15.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 02 unit/subunit : 0016
hole: 0642E top int: 123 cm observer code: DU
core: 016R pieces : 11-13.
rock name: FINE-GRAINED, MODERATELY OLIVINE-PLAGIOCLASE PHYRIC, GRAY
BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
Plagioclase phenocrysts are up to 4.0 mm long and olivines up to 0.7 mm in
diameter. Highly to moderately vesicular with calcite, dark green smectite
and zeolite fills. Unit F16.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 03 unit/subunit : 0016
hole: 0642E top int: 0 cm observer code: DU
core: 016R pieces : 1-8.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-16R-2, Unit 16.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 03 unit/subunit : 0017
hole: 0642E top int: 100 cm observer code: DU
core: 016R pieces : 9-14.
rock name: FINE-GRAINED, APHYRIC, GRAY, BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
Flow base not recorved. Thick (>2.0 m) reddened gray to brownish gray
highly vesicular flow top, containing reddish iddingsitized olivines, and
green smectite or calcite filled vesicles. Vesicularity decreases to
moderate or sparsely vesicular downsection., predominately dark green
smectite fills. Development of subhorizontal laminar streaking (flow
fabric) below 17R-2, 113 cm, seen as continuous and discontinuous smectite-
rich laminae, some reddening from the iddingsitization of olivines. Some
massive zones, e.g. 17R-4. Native copper disseminated throughout groundmass
or within vesicles. Unit F17.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0017
hole: 0642E top int: 0 cm observer code: DU
core: 017R pieces : 1-3.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-16R-3, Unit 17.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0017
hole: 0642E top int: 0 cm observer code: DU
core: 018R pieces : 1-5F.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-16R-3, Unit 17.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 02 unit/subunit : 0017
hole: 0642E top int: 0 cm observer code: DU
core: 018R pieces : 1A-3B.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-16R-3, Unit 17.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 03 unit/subunit : 0017
hole: 0642E top int: 0 cm observer code: DU
core: 018R pieces : 1A-2.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-16R-3, Unit 17.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 04 unit/subunit : 0017
hole: 0642E top int: 0 cm observer code: DU
core: 018R pieces : 1-13.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-16R-3, Unit 17.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 05 unit/subunit : 0018
hole: 0642E top int: 0 cm observer code: DU
core: 018R pieces : 1-13.
rock name: FINE-GRAINED, APHYRIC, GRAY BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
Light reddish brown, highly vesicular flow top, grading to brownish gray
and gray. As Unit F17 with some subhorizontal fracturing < 1.0 mm wide
filled with smectite. Generally weak streaking fabric in central flow.
Disseminated copper present. Basal contact with S10 is irregular and
quenched. Unit F18.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0018
hole: 0642E top int: 0 cm observer code: DU
core: 019R pieces : 1-8.
rock name: FINE-GRAINED, APHYRIC, GRAY BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-18R-5, Unit F18.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 02 unit/subunit : 0018
hole: 0642E top int: 0 cm observer code: DU
core: 019R pieces : 1-4.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See descrition in 642E-18R-5, Unit F18.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 03 unit/subunit : 0018
hole: 0642E top int: 0 cm observer code: DU
core: 019R pieces : 1-3.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-18R-5, Unit F18.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 04 unit/subunit : 0018
hole: 0642E top int: 0 cm observer code: DU
core: 019R pieces : 1A-9.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-18R-5, Unit F18.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 04 unit/subunit : 0010
hole: 0642E top int: 137 cm observer code: DU
core: 019R pieces : 10
rock name: DARK BROWN TO GRAY GREEN, WELL-SORTED VITRIC TUFF.
contact : see comments
***** MAIN COMMENTS *****
Contains accretionary lapilli and rounded clasts of brown to fine red tuff.
Pale green smectite present in pore spaces. Very few fresh shards. Pocket
infilling of scoriaceous material, top to F19. Unit S10.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 05 unit/subunit : 0010
hole: 0642E top int: 0 cm observer code: DU
core: 019R pieces : 1-3.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-19R-4, Unit S10.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 05 unit/subunit : 0019
hole: 0642E top int: 20 cm observer code: DU
core: 019R pieces : 4-6.
rock name: FINE-GRAINED, APHYRIC, DARK GRAY BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
Flow base not recorved. Highly vesicular at flow top, dark greenish gray
from smectite alteration. Local coalescence of vesicles to up to 25% of
rock volume, filled with dark green smectite. Towards base, from 20R-4, 30
cm down to base of recovery, streaky (flow fabric) laminations present,
accompanied by elongate green smectite-filled vesicles. [Unrelated rubble
at 642E-20R-1(0-9 cm)]. Unit F19.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0019
hole: 0642E top int: 0 cm observer code: DU
core: 020R pieces : 1-10.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-19R-5, Unit F19.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 02 unit/subunit : 0019
hole: 0642E top int: 0 cm observer code: DU
core: 020R pieces : 1-3D.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-19R-5, Unit F19.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 03 unit/subunit : 0019
hole: 0642E top int: 0 cm observer code: DU
core: 020R pieces : 1A-6.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-19R-5, Unit F19.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 04 unit/subunit : 0019
hole: 0642E top int: 0 cm observer code: DU
core: 020R pieces : 1-7.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-19R-5, Unit F19.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 04 unit/subunit : 0020
hole: 0642E top int: 104 cm observer code: DU
core: 020R pieces : 8.
rock name: MEDIUM-GRAINED MODERATELY PLAGIOCLASE-OLIVINE PHYRIC, GRAY
TO DARK BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
Highly vesicular, mostly dark green smectite filled with minor calcite and
zeolite, grading to sparsely vesicular in lower section. Dark green gray
smectite filled hairline fracturing. Some inclination of vesicles streaming
in center of floUnit F20.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0020A
hole: 0642E top int: 38 cm observer code: DU
core: 021R pieces : 12-14.
rock name: AS UNIT 20.
contact : see comments
***** MAIN COMMENTS *****
Unrelated rubble of volcaniclastic sediment at 642E-21R-1 (0-38cm). Unit
F20A.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 02 unit/subunit : 0020A
hole: 0642E top int: 0 cm observer code: DU
core: 021R pieces : All
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 624E-21R-1, Unit F20A.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 03 unit/subunit : 0020A
hole: 0642E top int: 0 cm observer code: DU
core: 021R pieces : 1A-6.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 624E-21R-1, Unit F20A.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 03 unit/subunit : 0021
hole: 0642E top int: 48 cm observer code: DU
core: 021R pieces : 7-12D.
rock name: MEDIUM-GRAINED, MODERATELY PHYRIC, DARK GRAY BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
Very dark gray to black highly vesicular flow top, red-veined and
brecciated. Vesicles filled lower in flow by dark green smectite. 2.0-4.0
mm long plagioclase laths and <3.0 mm olivines present. Predominantly
subvertical or steeply inclined smectite filled veining. Unit F21.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 04 unit/subunit : 0021
hole: 0642E top int: 0 cm observer code: DU
core: 021R pieces : 1A-5.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-21R-3, Unit F21.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 05 unit/subunit : 0021
hole: 0642E top int: 0 cm observer code: DU
core: 021R pieces : 1-4.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-21R-3, Unit F21.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 05 unit/subunit : 0022
hole: 0642E top int: 61 cm observer code: DU
core: 021R pieces : 6.
rock name: MEDIUM-GRAINED, SPARSELY TO MODERATELY OLIVINE-PLAGIOCLASE
PHYRIC, GRAY BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
Euhedral olivines and plagioclase laths < 3.0 mm diameter. Moderately
vesicular, filled with dark green smectite. Steeply inclined fracturing
filled with smectite. Subhorizontal elliptical vesicles at 22R-2, 60 to 62
cm. Unit F22.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0022
hole: 0642E top int: 0 cm observer code: DU
core: 022R pieces : 1-10B.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-21R-5, Unit F22.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 02 unit/subunit : 0022
hole: 0642E top int: 0 cm observer code: DU
core: 022R pieces : 1-3C.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-21R-5, Unit F22.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 03 unit/subunit : 0022
hole: 0642E top int: 0 cm observer code: DU
core: 022R pieces : 1A-3.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-21R-5, Unit F22.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 03 unit/subunit : 0023
hole: 0642E top int: 86 cm observer code: DU
core: 022R pieces : 4-7.
rock name: MEDIUM-GRAINED, SPARSELY OLIVINE PLAGIOCLASE PHYRIC, GRAY
BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
Highly vesicular flow top, smectite rimmed or unfilled at top, decreasing
to moderate or nonvesicular in lower flow. Euhedral iddingsitized olivines
and tabular plagioclase 0.3-0.5 mm diameter. Vesicular base. Unit F23.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 04 unit/subunit : 0023
hole: 0642E top int: 0 cm observer code: DU
core: 022R pieces : 1-7.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-22R-3, Unit F23.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 05 unit/subunit : 0023
hole: 0642E top int: 0 cm observer code: DU
core: 022R pieces : 1-7.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-22R-3, Unit F23.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 06 unit/subunit : 0023
hole: 0642E top int: 0 cm observer code: DU
core: 022R pieces : 1.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-22R-3, Unit F23.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 06 unit/subunit : 0011
hole: 0642E top int: 20 cm observer code: DU
core: 022R pieces : All
rock name: DARK RED BROWN TUFF.
contact : see comments
***** MAIN COMMENTS *****
Basaltic vitiric. Unit S11.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 06 unit/subunit : 0024
hole: 0642E top int: 21 cm observer code: DU
core: 022R pieces : 2-12.
rock name: MEDIUM-GRAINED OLIVINE PHYRIC, GRAY BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
Reddened brown gray highly vesicular flow top, iddingsitized olivines
common. Vesicles filled with green smectite and some calcite. Some patch
smectite alternation, steeply inclined 2.0 mm wide fracturing and
brecciation at 23R-1, 17-34 cm. Unit F24.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0024
hole: 0642E top int: 0 cm observer code: DU
core: 023R pieces : 1-3.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-22R-6, Unit F24.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0012
hole: 0642E top int: 73 cm observer code: DU
core: 023R pieces : 4-6B.
rock name: GREEN TO RED BROWN OR OLIVE BROWN TUFF.
contact : see comments
***** MAIN COMMENTS *****
Median grain diameter of 0.15 mm, with some fragments of finer grained
differentiated tuffs and some medium sorted basaltic tuffs. Irregular
bedding features. Unit S12.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 02 unit/subunit : 0012
hole: 0642E top int: 0 cm observer code: DU
core: 023R pieces : 1-8.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-23R-1, Unit S12.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 02 unit/subunit : 0025
hole: 0642E top int: 0 cm observer code: DU
core: 023R pieces : 1-12.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-23R-2, Unit F25.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 02 unit/subunit : 0025
hole: 0642E top int: 125 cm observer code: DU
core: 023R pieces : All
rock name: FINE-GRAINED, APHYRIC TO MODERATELY OLIVINE-PLAGIOCLASE
PHYRIC BASALT FLOW
contact : see comments
***** MAIN COMMENTS *****
Moderate vesicularity, but variable and locally highly vesicular, some
breccia zones. Vesicles filled with dark green smectite, locally calcite.
Unit F25.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 03 unit/subunit : 0025
hole: 0642E top int: 0 cm observer code: DU
core: 023R pieces : 1-22.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-23R-2, Unit F25.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 03 unit/subunit : 0013
hole: 0642E top int: 126 cm observer code: DU
core: 023R pieces : 23.
rock name: DARK BROWN, FINE GRAINED TUFF.
contact : see comments
***** MAIN COMMENTS *****
Rounded lapilli of fine grained tuff. Contacts with adjacent units not
recovered. Unit S13.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 03 unit/subunit : 0026
hole: 0642E top int: 127 cm observer code: DU
core: 023R pieces : 24-28.
rock name: MEDIUM-GRAINED, MODERATELY OLIVINE-PLAGIOCLASE PHYRIC BASALT
FLOW.
contact : see comments
***** MAIN COMMENTS *****
Moderate vesicularity, vesicles filled with dark green smectite. Unit F26.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0026
hole: 0642E top int: 0 cm observer code: DU
core: 024R pieces : 1-7.
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
See description in 642E-23R-3, Unit F26.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0014
hole: 0642E top int: 27 cm observer code: DU
core: 024R pieces : All
rock name: VERY DARK BROWN TUFF
contact : see comments
***** MAIN COMMENTS *****
Unit S14.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 104 section: 01 unit/subunit : 0027
hole: 0642E top int: 30 cm observer code: DU
core: 024R pieces : 9-23.
rock name: FINE-GRAINED,APHYRIC GRAY BASALT FLOW.
contact : see comments
***** MAIN COMMENTS *****
Locally microbrecciated flow top, with some pale green smectite-filled
fractures. Most vesicles are dark green smectite filled. Moderately
vesicular toward center of flow. Some rare rounded cognate xenoliths of
highly vesicular, fine-grained aphyric gray basalt present. Fine basalt
breccia at 25R-3, 76-79 cm. [Unrelated rubble at 642E-25R-1 (0-12cm)]. Unit
F27.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
introduction | data types | geographic areas | legs/sites/holes | sites/holes
These Web pages are from the Core Data from the Ocean Drilling Program Legs 101-129 CD-ROM produced in 2001 by the U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Environmental Satellite, Data, and Information Service, National Geophysical Data Center, and collocated World Data Center for Marine Geology and Geophysics, Boulder. Data were compiled in cooperation with the U.S. Science Support Program, the Joint Oceanographic Institutions, Inc., and the U.S. National Science Foundation. Please see the NGDC privacy, disclaimer, and copyright notices. Additional ocean drilling data are available from NGDC and from the ODP/IODP.
questions to: carla.j.moore@noaa.gov