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Core data from the Ocean Drilling Program legs 101-129
leg : 106 section: 01 unit/subunit : 0001
hole: 0648B top int: 5 cm observer code: KUE
core: 001R pieces : 2
rock name: SPARSELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
phenocryst name % size description
Plagioclase 2 1-3 mm Euhedral, fresh
Homogeneous distribution.
***** GROUNDMASS *****
Uniformly microcrystalline.
***** COLOR *****
gray
***** VESICLES *****
percent: < 1
size: < 1 mm
shape: Round, empty
distribution: n/a
***** STRUCTURE *****
n/a
***** ALTERATION *****
fresh
***** VEINS/FRACTURES *****
none
leg : 106 section: 01 unit/subunit : 0001
hole: 0648B top int: 8 cm observer code: KUE
core: 001R pieces : 3
rock name: APHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
phenocryst name % size description
Plagioclase < 1 n/a
***** GROUNDMASS *****
Very fine grained.
***** COLOR *****
Gray
***** VESICLES *****
percent: < 1
size: < 1 mm
shape: Round, empty
distribution: n/a
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh.
***** VEINS/FRACTURES *****
none
leg : 106 section: 01 unit/subunit : 0001
hole: 0648B top int: 12 cm observer code: KUE
core: 001R pieces : 4
rock name: MODERATELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
phenocryst name % size description
Plagioclase 5 < 5 mm Euhedral, fresh
Homogeneous distribution.
***** GROUNDMASS *****
Fine-grained, visible plagioclase laths.
***** COLOR *****
Gray
***** VESICLES *****
percent: 1
size: < 1 mm
shape: Round, empty
distribution: n/a
***** STRUCTURE *****
n/a
***** ALTERATION *****
fresh
***** VEINS/FRACTURES *****
none
leg : 106 section: 01 unit/subunit : 0002
hole: 0648B top int: 16 cm observer code: KUE
core: 001R pieces : 5 and 6
rock name: MODERATELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution throughout unit of plagioclase, 3%, 2-5 mm,
euhedral, fresh.
***** GROUNDMASS *****
Microcrystalline (Piece 5) to fine grained (Piece 6), coarsening downward.
***** COLOR *****
Gray
***** VESICLES *****
Piece 5: 4%, <2 mm, round, empty. Piece 6: vug, approximately 10 mm
diameter, lined with orange brown iron mineral, vesicles on outer
surface lined with green clay mineral; black line and light halo 3 mm
wide.
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh, Piece 6: 1 mm halo on top edge.
***** VEINS/FRACTURES *****
none
leg : 106 section: 01 unit/subunit : 0003
hole: 0648B top int: 37 cm observer code: KUE
core: 001R pieces : 7-16
rock name: SPARSELY TO MODERATELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: Piece 7: glassy margin with little glass, fresh, no contacts.
***** PHENOCRYSTS *****
Irregular distribution of plagioclase throughout unit. Pieces 7-10 and
13-16: approximately 2%, 2-5 mm, euhedral, fresh. Pieces 11-12: 4%, 2-
5 mm, euhedral, fresh.
***** GROUNDMASS *****
Microcrystalline (Piece 7) to fine grained (Piece 16), coarsening downward.
***** COLOR *****
Gray
***** VESICLES *****
Tr-1%, <1-2 mm, round, empty, even distribution. Piece 7: vug
approximately 10 mm long lined with yellow orange iron mineral with 3
mm-wide halo. Piece 14: vesicles concentrated along dark alteraion
zone.
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh. Pieces 11 and 14: black line and light alteration halo around edge.
Piece 16: dark alteration halo around plagioclase phenocrysts at bottom of
piece.
***** VEINS/FRACTURES *****
Piece 10: empty crack.
leg : 106 section: 01 unit/subunit : 0004
hole: 0648B top int: 92 cm observer code: KUE
core: 001R pieces : 17-19
rock name: MODERATELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, cooling margin on Pieces 17 and 19, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution throughout unit, plagioclase, 4%, 2-5 mm,
euhedral, fresh.
***** GROUNDMASS *****
Microcrystalline (Piece 17 and 19) to fine grained in center (Piece 18).
***** COLOR *****
Gray
***** VESICLES *****
Piece 17: <7%, 1 mm, round, vesicles concentrated. Piece 18: Tr-1%, <
1mm, round, empty, even distribution. Piece 19: 2%, some 2 mm, most <
1mm, round,concentrated.
***** STRUCTURE *****
n/a
***** ALTERATION *****
fresh. Piece 17: light alteration halo < 2 cm wide with thin black line
parallel to cooling margin.
***** VEINS/FRACTURES *****
Several fine fractures with very thin green clay coating on broken
surfaces.
leg : 106 section: 01 unit/subunit : 0005
hole: 0648B top int: 112 cm observer code: KUE
core: 001R pieces : 1r-1,Piece 20, to 1r-2,Piece 1
rock name: SPARSELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
phenocryst name % size description
Plagioclase 2 2-5 mm Euhedral, fresh.
Homogeneous distribution throughout unit. Piece 26: glomerocrysts, 2
mm across
***** GROUNDMASS *****
Microcrystalline margins with fine-grained center (Piece 24).
***** COLOR *****
Gray
***** VESICLES *****
percent: < 1
size: < 1-2 mm
shape: Round, empty
distribution: Even
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh. Piece 26: 3 mm light alteration halo along top with thin black line.
***** VEINS/FRACTURES *****
none
leg : 106 section: 02 unit/subunit : 0006
hole: 0648B top int: 5 cm observer code: KUE
core: 001R pieces : 2-7
rock name: SPARSELY TO MODERATELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Variable distribution throughout unit, plagioclase. Piece 2: 3%, 2-5
mm, euhedral, fresh. Pieces 3 and 4: 1%, 2-5 mm, euhedral, fresh.
Piece 5: 2%, 2-5 mm, euhedral, fresh. Pieces 6 and 7: <1%, 2-5 mm,
euhedral, fresh.
***** GROUNDMASS *****
Uniformly microcrystalline except Piece 5, which is fine grained.
***** COLOR *****
Gray
***** VESICLES *****
percent: < 1
size: < 1-2 mm
shape: Round, empty
distribution: Even distribution
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh. Piece 2: 4 cm-wide light alteration halo at top with thin black
line.
***** VEINS/FRACTURES *****
Piece 4: minor empty cracks.
leg : 106 section: 02 unit/subunit : 0007
hole: 0648B top int: 45 cm observer code: KUE
core: 001R pieces : 8-10
rock name: SPARSELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution throughout unit, plagioclase. Pieces 8 and 9:
< 2%, 2-5 mm, euhedral, fresh, including glomerocrysts. Piece 10: < 1%
, 2-5 mm, euhedral, fresh.
***** GROUNDMASS *****
Microcrystalline (Pieces 8 and 10) to fine grained (Piece 9), coarsening to
center.
***** COLOR *****
Gray
***** VESICLES *****
percent: < 1
size: < 1 mm
shape: Round, empty
distribution: Even distribution
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh. Piece 9: light alteration halos running irregularly across piece
with thin black line. Piece 10: 2 mm black halo along edge.
***** VEINS/FRACTURES *****
none
leg : 106 section: 02 unit/subunit : 0008
hole: 0648B top int: 60 cm observer code: KUE
core: 001R pieces : 11-13
rock name: SPARSELY TO MODERATELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Variable distribution throughout unit, plagioclase. Piece 11: 4%, 2-5
mm, euhedral, fresh, glomerocrysts < 3 mm across. Piece 12: 1%, 2-5
mm, euhedral, fresh. Piece 13: < 1%, 2-5 mm, euhedral, fresh.
***** GROUNDMASS *****
Microcrystalline (Piece 13) to fine grained (Piece 11), coarsening upward.
***** COLOR *****
Gray
***** VESICLES *****
Piece 11: 1%, < 1 mm, round, empty, associated with phenocrysts.
Pieces 12 and 13: < 1%, < 1 mm, round, empty, associated with
phenocrysts.
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh. Piece 11: 2 mm black alteration halo along edge.
***** VEINS/FRACTURES *****
Piece 11: two empty hairline cracks.
leg : 106 section: 02 unit/subunit : 0009
hole: 0648B top int: 78 cm observer code: KUE
core: 001R pieces : 14 and 15
rock name: SPARSELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution throughout unit, plagioclase. Pi ce 14: 1-2%,
3 mm, euhedral, fresh, glomerocrysts 4 mm across. Piece 15: 1-2%, 4
mm, euhedral, fresh, no glomerocrysts.
***** GROUNDMASS *****
Fine grained (Piece 14) to microcrystalline (Piece 15), coarsening upward.
***** COLOR *****
Gray
***** VESICLES *****
percent: < 1
size: < 1 mm
shape: Round, empty
distribution: Even distribution
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh.
***** VEINS/FRACTURES *****
One very thin empty crack.
leg : 106 section: 02 unit/subunit : 0010
hole: 0648B top int: 92 cm observer code: KUE
core: 001R pieces : 16-19
rock name: SPARSELY TO MODERATELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Irregular distribution throughout unit, plagioclase. Pieces 16 and 18:
2%, 2-5 mm, euhedral, fresh. Piece 17: 1%, 2-5 mm, euhedral, fresh.
Piece 19: 4%, 2-5 mm, euhedral, fresh.
***** GROUNDMASS *****
Microcrystalline (Piece 19) to fine grained (Pieces 16-18), coarsening
downward.
***** COLOR *****
Gray
***** VESICLES *****
percent: < 1
size: < 1 mm
shape: Round, empty
distribution: Even distribution
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh. Piece 18: light alteration halo with black line, yellow-stained
plagioclase. Piece 19: black halo.
***** VEINS/FRACTURES *****
Pieces 16, 19 and 20: single open fracture without lining.
leg : 106 section: 02 unit/subunit : 0011
hole: 0648B top int: 120 cm observer code: KUE
core: 001R pieces : 1r-2, Piece 20,to 1r-3,piece 1
rock name: SPARSELY TO MODERATELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Irregular distribution throughout unit, plagioclase. Piece 20: 2%, 2-5
mm, euhedral, fresh. Pieces 21-23: 1%, 2-5 mm, euhedral, fresh. Piece
21: glomerocryst 10 mm across. Piece 24: 4%, 2-5 mm, euhedral, fresh.
***** GROUNDMASS *****
Microcrystalline (Piece 24) to fine grained (Piece 20), coarsening upward.
***** COLOR *****
Gray
***** VESICLES *****
percent: < 1
size: < 1 mm
shape: Round, empty
distribution: Even distribution
Pieces 21 and 22: associated with phenocrysts.
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh. Piece 1: light alteration halo with black line.
***** VEINS/FRACTURES *****
none
leg : 106 section: 03 unit/subunit : 0012
hole: 0648B top int: 6 cm observer code: KUE
core: 001R pieces : 2-6
rock name: SPARSELY TO MODERATELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Irregular distribution throughout unit, plagioclase. Piece 2: 2%, 2-5
mm, euhedral, fresh. Pieces 3-6: 4%, 2-5 mm, euhedral, fresh.
***** GROUNDMASS *****
Microcrystalline (Piece 6) to fine grained (Piece 2). coarsening upward.
***** COLOR *****
Gray
***** VESICLES *****
percent: < 1
size: < 2 mm
shape: Round, empty
distribution: Even distribution
***** STRUCTURE *****
n/a
***** ALTERATION *****
fresh
***** VEINS/FRACTURES *****
none
leg : 106 section: 03 unit/subunit : 0013
hole: 0648B top int: 31 cm observer code: KUE
core: 001R pieces : 7-10
rock name: SPARSELY TO MODERATELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution throughout unit, plagioclase, 2-4 %, 2-5 mm,
euhedral, fresh.
***** GROUNDMASS *****
Microcrystalline (Pieces 9 and 10) to fine grained (Pieces 7 and 8),
coarsening upward.
***** COLOR *****
Gray
***** VESICLES *****
percent: < 1
size: < 1 mm
shape: Round, empty
distribution: n/a
Associated with phenocrysts.
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh. Piece 8: light alteration halo with black line and yellow stained
plagioclase. Pieces 9 and 10: light alteration halo with black line.
***** VEINS/FRACTURES *****
Piece 8: empty crack.
leg : 106 section: 03 unit/subunit : 0014
hole: 0648B top int: 54 cm observer code: KUE
core: 001R pieces : 11-15
rock name: SPARSELY TO MODERATELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution throughout unit, plagioclase, 2-4%, 2-5 mm,
euhedral, fresh. Pieces 11 and 14: glomerocrysts < 3 mm across.
***** GROUNDMASS *****
Uniformly fine grained.
***** COLOR *****
Gray
***** VESICLES *****
miaroles: Piece 11: 2-3% vesicles and miaroles.
Tr-1%, < 1 mm, round, empty, associated with phenocrysts and
glomerocrysts. Piece 11: 2-3% vesicles and miaroles, < 0.5 mm, round,
empty, concentrated in lines, not parallel.
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh. Piece 13: light alteration halo with black line.
***** VEINS/FRACTURES *****
none
leg : 106 section: 03 unit/subunit : 0015
hole: 0648B top int: 86 cm observer code: KUE
core: 001R pieces : 16-20
rock name: SPARSELY TO MODERATELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none. Piece 16: cooling margin without glass, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution throughout unit, plagioclase, 2-4 %, 2-5 mm,
euhedral, fresh, glomerocrysts.
***** GROUNDMASS *****
Microcrystalline (Pieces 17-20) to glassy (Piece 16), coarsening downward.
***** COLOR *****
Gray
***** VESICLES *****
Tr-1%, < 1 mm, round, empty, often associated with phenocrysts. Piece
16: vesicles concentrated near margin (1%) < 1 % away from margin.
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh. Piece 16: light alteration halo with black line 35 mm from glassy
margin edge. Pieces 18 and 19: light alteration halo with black line.
***** VEINS/FRACTURES *****
Piece 16: some open cracks extending from glass margin into samples.
leg : 106 section: 03 unit/subunit : 0016
hole: 0648B top int: 109 cm observer code: KUE
core: 001R pieces : 21-24
rock name: SPARSELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution throughout unit, plagioclase, 2%, 2-5 mm,
euhedral, fresh.
***** GROUNDMASS *****
Microcrystalline(Piece 23) to fine grained (Piece 21), coarsening upward.
***** COLOR *****
Gray
***** VESICLES *****
percent: < 1
size: < 1 mm
shape: Round, empty
distribution: Even distribution
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh
***** VEINS/FRACTURES *****
Piece 23: empty hairline crack.
leg : 106 section: 01 unit/subunit : 0017
hole: 0648B top int: 0 cm observer code: KUE
core: 002R pieces : 1
rock name: SPARSELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution, plagioclase, 2%, < 4 mm, euhedral, fresh.
***** GROUNDMASS *****
Uniformly fine grained.
***** COLOR *****
Gray
***** VESICLES *****
percent: < 1
size: < 1 mm
shape: Round, empty
distribution: Even distribution
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh, dark alteration halo on one edge.
***** VEINS/FRACTURES *****
none
leg : 106 section: 01 unit/subunit : 0017
hole: 0648B top int: 2 cm observer code: KUE
core: 002R pieces : 2
rock name: SPARSELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution, plagioclase, 2%, < 4 mm, euhedral, fresh.
***** GROUNDMASS *****
Uniformly fine grained.
***** COLOR *****
Gray
***** VESICLES *****
percent: < 1
size: < 1 mm
shape: Round, empty
distribution: Even distribution
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh, 2 mm dark alteration halo along one edge.
***** VEINS/FRACTURES *****
none
leg : 106 section: 01 unit/subunit : 0017
hole: 0648B top int: 5 cm observer code: KUE
core: 002R pieces : 3
rock name: SPARSELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution , plagioclase, 2%, < 4 mm, euhedral, fresh.
***** GROUNDMASS *****
Uniformly fine grained.
***** COLOR *****
Gray
***** VESICLES *****
percent: < 1
size: < 1 mm
shape: Round, empty
distribution: n/a
Concentrated along some margins.
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh, light alteration halo with black line.
***** VEINS/FRACTURES *****
Several hairline cracks, all empty; no preferred orientation.
leg : 106 section: 01 unit/subunit : 0018
hole: 0648B top int: 0 cm observer code: KUE
core: 003R pieces : 1-4
rock name: SPARSELY TO MODERATELY OLIVINE-PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, cooling margin on Piece 4, no contacts.
***** PHENOCRYSTS *****
phenocryst name % size description
Plagioclase 2 2 mm Euhedral, fresh (Piece 1)
Plagioclase 2 < 6 mm Euhedral, fresh (Piece 2)
Plagioclase 4 < 6 mm Euhedral, fresh (Piece 3)
Plagioclase 3 < 6 mm Euhedral, fresh (Piece 4)
Olivine 1 < 0.5 mm Subhedral, in glomerocryst, fresh
(Piece 4)
Irregular distribution throughout unit; Pieces 1-4: approximately 20%
of phenocrysts are glomerocrysts.
***** GROUNDMASS *****
Microcrystalline (Piece 4) to fine grained (Piece 1), coarsening upward.
***** COLOR *****
Gray
***** VESICLES *****
miaroles: Pieces 1 and 4: ~ 33%
Piece 1: < 1%, < 1 mm, round, empty, ~33% as miaroles, vesicles
concentrated at lower margin. Pieces 2 and 3: as in Piece 1, but even
distribution. Piece 4: 2%, < 2 mm, round, most empty some with lining,
even distribution, ~33% as miaroles.
***** STRUCTURE *****
n/a
***** ALTERATION *****
fresh, Pieces 2 and 4: light alteration halo with black line.
***** VEINS/FRACTURES *****
Piece 4: several open cracks.
leg : 106 section: 01 unit/subunit : 0019
hole: 0648B top int: 25 cm observer code: KUE
core: 003R pieces : 5-12
rock name: SPARSELY TO MODERATELY OLIVINE-PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: Piece 12: glassy margin, fresh, no contacts.
***** PHENOCRYSTS *****
Irregular distrbution throughout unit. Plagioclase- Pieces 5-8: 3%, 2-
4 mm, euhedral, fresh; approximately 33% of phenocrysts are
glomerocrysts. Pieces 9-12: 2%, 2-4 mm, euhedral, fresh. Olivine- < 1%
, < 1 mm, euhedral, in glomerocrysts, fresh.
***** GROUNDMASS *****
Fine grained, with acicular groundmass plagioclase as large as 1 mm (Piece
5) to microcrystalline (Piece 12), coarsening upward.
***** COLOR *****
Dark gray
***** VESICLES *****
miaroles: ~ 33% in Pieces 5-8, 10, and 12
Pieces 5-8, 10, and 12: 3%, < 1 mm, round, 5-10% with clay lining,
others empty , even distribution, approximately 33% as miaroles. Piece
8: 10% of vesicles lined with brown clay. Pieces 9 and 11: < 1%, < 1
mm, round, empty. Piece 12: concentrated at bottom.
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh. Piece 5: 10-mm-thick light alteration halo with black line. Pieces
6-8: light alteration halo on margin with black line. Piece 12: light
alteration halo with black line 10 mm from glassy margin, penetrating
further inside along a fracture.
***** VEINS/FRACTURES *****
Piece 10: several fractures, void. Piece 12: several fractures coated
with greenish brown clay.
leg : 106 section: 01 unit/subunit : 0020
hole: 0648B top int: 80 cm observer code: KUE
core: 003R pieces : 3r-1,Piece 13,to 4r-1,Piece 1
rock name: SPARSELY TO MODERATELY OLIVINE-PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Irregular distribution throughout unit. Plagioclase- Piece 13: 2%, 1-2
mm, euhedral, fresh, some glomerocrysts. Pieces 1 and 14: 3%, < 5 mm,
euhedral, fresh. some glomerocrysts. Olivine- < 1%, < 1 mm, euhedral,
fresh, some glomerocrysts.
***** GROUNDMASS *****
Uniformly fine grained.
***** COLOR *****
Dark gray
***** VESICLES *****
Pieces 1 and 14: 1%, < 1 mm, round, empty, even distribution. Piece
13: concentrated at one margin.
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh, Piece 14: 20-30-mm light alteration halo with black line on all
sides.
***** VEINS/FRACTURES *****
Piece 14: several empty cracks.
leg : 106 section: 01 unit/subunit : 0021
hole: 0648B top int: 2 cm observer code: KUE
core: 004R pieces : 2-5
rock name: MODERATELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
phenocryst name % size description
Plagioclase 3 < 5 mm; Piece Euhedral, fresh
4: 1-7 mm
Homogeneous distribution throughout unit.
***** GROUNDMASS *****
Uniformly fine grained.
***** COLOR *****
Gray
***** VESICLES *****
percent: < 1
size: < 1 mm
shape: Round, empty
distribution: Even distribution
Piece 4: concentrated along two margins.
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh. Pieces 2 and 3: Light alteration halo with black line approximately
2 mm in from edge. Piece 3: orange clay coating on some surfaces. Piece 5:
light alteration halo with two black lines approximately 4 mm and 10 mm
from edge.
***** VEINS/FRACTURES *****
Piece 5: empty fracture.
leg : 106 section: 01 unit/subunit : 0022
hole: 0648B top int: 30 cm observer code: KUE
core: 004R pieces : 6-11
rock name: SPARSELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution throughout unit, plagioclase, 2%, 2-5 mm
(average 3 mm), euhedral, fresh. Piece 7: 3%.
***** GROUNDMASS *****
Fine grained, coarsening toward Piece 10.
***** COLOR *****
Gray
***** VESICLES *****
Piece 6: 1%, < 2 mm, irregular, empty, aligned throughout center of
piece. Pieces 7-9 and 11: < 1%, < 1 mmm irregular, empty, even
distribution. Piece 8: occasionally lined with orange brown mineral.
Piece 10: 2%, < 2 mm, mostly round, empty, even distribution.
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh. Piece 7: light alteration halo with black line approximately 3 mm
from edge; three dark, irregularly shaped patches approximately 7 mm
across. Piece 8: complex and irregular halo, structure similar to Piece 7,
clay on outer surface. Piece 9: light alteration halo with black line
approximately 10 mm from edge. Piece 10: small, light alteration halo with
black line approximately 2-5 mm from edge. Piece 11: minor clay on surface.
***** VEINS/FRACTURES *****
Pieces 7 and 8: one small fracture, empty.
leg : 106 section: 01 unit/subunit : 0023
hole: 0648B top int: 62 cm observer code: KUE
core: 004R pieces : 12
rock name: SPARSELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: glassy margin (pillow?), incipient weathering, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution throughout unit, plagioclase, 1%, 3-6 mm,
average 3 mm, euhedral, fresh.
***** GROUNDMASS *****
Very fine grained to microcrystalline.
***** COLOR *****
Dark gray
***** VESICLES *****
percent: < 1
size: Generally < 1mm but some 3 mm
shape: Round and elongate, empty
distribution: n/a
Concentrated toward glassy margins.
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh, light alteration halo with 1-2 mm black line 35 mm from glassy
margin, incipient weathering of glass.
***** VEINS/FRACTURES *****
none
leg : 106 section: 01 unit/subunit : 0024
hole: 0648B top int: 0 cm observer code: KUE
core: 005R pieces : 1
rock name: SPARSELY PLAGIOCLASE-OLIVINE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: very little, maybe tachylite, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution. Plagioclase- 1-2%, 1.5 mm, euhedral, fresh,
20% as glomerocrysts with olivine. Olivine- < 1%, 0.5 mm, euhedral,
fresh, in glomerocrysts with plagioclase.
***** GROUNDMASS *****
Microcrystalline to fine grained.
***** COLOR *****
Dark gray
***** VESICLES *****
none
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh
***** VEINS/FRACTURES *****
none
leg : 106 section: 01 unit/subunit : 0024
hole: 0648B top int: 2 cm observer code: KUE
core: 005R pieces : 2
rock name: SPARSELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution, plagioclase, 1-2%, 1.5 mm, euhedral, fresh.
***** GROUNDMASS *****
Uniformly fine grained.
***** COLOR *****
Dark gray
***** VESICLES *****
percent: 2
size: 0.5 mm average
shape: Round, empty
distribution: n/a
miaroles: 80%
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh
***** VEINS/FRACTURES *****
none
leg : 106 section: 01 unit/subunit : 0024
hole: 0648B top int: 6 cm observer code: KUE
core: 005R pieces : 3
rock name: SPARSELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution, plagioclase, 1-2%, approximately 2 mm,
euhedral, fresh.
***** GROUNDMASS *****
Uniformly fine grained.
***** COLOR *****
Dark gray
***** VESICLES *****
percent: 1
size: 0.5 mm average
shape: Round, empty
distribution: n/a
miaroles: 10%
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh
***** VEINS/FRACTURES *****
none
leg : 106 section: 01 unit/subunit : 0024
hole: 0648B top int: 9 cm observer code: KUE
core: 005R pieces : 4
rock name: SPARSELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution, plagioclase, 1-2%, approximately 2 mm,
euhedral, fresh.
***** GROUNDMASS *****
Uniformly fine grained.
***** COLOR *****
Dark gray.
***** VESICLES *****
3%, 0.1-0.5 mm average, round, 90% empty 10% with brown lining at edge
of piece.
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh, 6 mm light alteration halo with black line, brown lining in
vesicles.
***** VEINS/FRACTURES *****
none
leg : 106 section: 01 unit/subunit : 0024
hole: 0648B top int: 22 cm observer code: KUE
core: 005R pieces : 5
rock name: SPARSELY PLAGIOCLASE-OLIVINE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution. PLagioclase- 1-2%, 1.5 mm, euhedral, fresh,
in glomerocrysts with olivine. Olivine- < 1%, 0.5 mm, euhedral, fresh,
in glomerocrysts with plagioclase.
***** GROUNDMASS *****
Very fine grained.
***** COLOR *****
Dark gray.
***** VESICLES *****
percent: ~ 1
size: 0.5 mm
shape: Round
distribution: n/a
Minor lining to vesicles at edge of piece.
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh, surface coating.
***** VEINS/FRACTURES *****
none
leg : 106 section: 01 unit/subunit : 0024
hole: 0648B top int: 30 cm observer code: KUE
core: 005R pieces : 6
rock name: SPARSELY PLAGIOCLASE-OLIVINE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution. Plagioclase- 1-2%, 1.5 mm, euhedral, fresh.
Olivine- < 1%, 0.5-1.0 mm, euhedral, fresh, as isolated crystals.
***** GROUNDMASS *****
Fine grained.
***** COLOR *****
Dark gray
***** VESICLES *****
percent: 1
size: 1 mm
shape: Round, some elongate, empty
distribution: n/a
miaroles: ~ 20%
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh, 25-mm light alteration halo near open crack with black line.
***** VEINS/FRACTURES *****
Several empty cracks.
leg : 106 section: 01 unit/subunit : 0024
hole: 0648B top int: 38 cm observer code: KUE
core: 005R pieces : 7
rock name: SPARSELY PLAGIOCLASE-OLIVINE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution. Plagioclase- 1-2%, 2 mm,euhedral, fresh, as
glomerocrysts with olivine. Olivine- < 1%, 0.5 mm, euhedral, fresh, in
glomerocrysts with plagioclase.
***** GROUNDMASS *****
Fine grained
***** COLOR *****
Dark gray
***** VESICLES *****
percent: < 1
size: 1 mm, few 3-4 mm on outer surface
shape: Round
distribution: n/a
Lined by brownish yellow clay.
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh, except outer surfaces
***** VEINS/FRACTURES *****
Several empty cracks.
leg : 106 section: 01 unit/subunit : 0024
hole: 0648B top int: 42 cm observer code: KUE
core: 005R pieces : 8
rock name: SPARSELY PLAGIOCLASE-OLIVINE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution. Plagioclase- 1-2%, 2 mm (one 5 mm),
euhedral, fresh, as glomerocrysts with olivine. Olivine- < 1%, 0.5 mm,
euhedral, fresh, in glomerocrysts with plagioclase.
***** GROUNDMASS *****
Fine grained
***** COLOR *****
Dark gray
***** VESICLES *****
percent: 2
size: 0.2-0.5 mm
shape: Round, empty
distribution: n/a
miaroles: ~ 20%
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh, light alteration halo with black line on outer surface.
***** VEINS/FRACTURES *****
One crack partially lined with brown smectite.
leg : 106 section: 01 unit/subunit : 0025
hole: 0648B top int: 0 cm observer code: KUE
core: 006R pieces : 1-8
rock name: SPARSELY TO MODERATELY PLAGIOCLASE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: Piece 7: two glass fragments < 5 mm, fresh, no contacts.
***** PHENOCRYSTS *****
Irregular distribution throughout unit, plagioclase. Pieces 1-4, 6,
and 7: 3%, < 4 mm, euhedral, fresh. Pieces 5 and 8: 2%, < 4 mm,
euhedral, fresh.
***** GROUNDMASS *****
Uniformly fine grained, glass fragments (Piece 7).
***** COLOR *****
Gray
***** VESICLES *****
Pieces 1-3, 6, and 7: rare, < 1 mm, round, empty, even distribution.
Piece 4: 1%, < 1-2 mm, round, empty, even distribution. Pieces 5 and
8: < 1%, 1 mm, round, minor clay on surface.
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh, Piece 2: small, light alteration halo with black line. Pieces 4, 5,
and 8: minor yellow green clay on surfaces.
***** VEINS/FRACTURES *****
none
leg : 106 section: 01 unit/subunit : 0026
hole: 0648B top int: 32 cm observer code: KUE
core: 006R pieces : 9-13
rock name: SPARSELY PLAGIOCLASE-OLIVINE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: Piece 9: fresh glassy margin, no contacts.
***** PHENOCRYSTS *****
Homogeneous distribution throughout unit. Plagioclase- <2%, 1-4 mm,
euhedral, fresh. Olivine- Piece 9: rare, < 1 mm, euhedral to
subhedral, fresh.
***** GROUNDMASS *****
Microcrystalline (Piece 9) to fine grained (Piece 13), coarsening downward.
***** COLOR *****
Gray
***** VESICLES *****
percent: < 1
size: < 1 mm
shape: Round, empty
distribution: Even distribution
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh, Piece 9: 2 mm-wide dark alteration halo on one margin, minor clay on
surface. Piece 11: minor yellow green clay on surface. Piece 12: 5 mm-wide
dark alteration halo on one margin. Piece 13: 2-4 mm-wide dark alteration
halo on one margin.
***** VEINS/FRACTURES *****
Empty hairline fractures void.
leg : 106 section: 01 unit/subunit : 0027
hole: 0648B top int: 61 cm observer code: KUE
core: 006R pieces : 14-25
rock name: SPARSELY TO MODERATELY PLAGIOCLASE-OLIVINE PHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: none, no contacts.
***** PHENOCRYSTS *****
Irregular distribution throughout unit. Plagioclase- 2%, 1-5 mm,
euhedral, fresh. Piece 18: one phenocrysts 8 mm long. Piece 25: 3%, 1-
5 mm, euhedral, fresh. Olivine- trace, 1 mm, subhedral to euhedral,
fresh.
***** GROUNDMASS *****
Fine grained, coarsening toward Piece 25.
***** COLOR *****
Gray
***** VESICLES *****
Vesicle distribution distinct in this unit. Piece 14-18: 5%, 1-3 mm,
mostly round, some irregular, even distribution, some filled with
orange brown clay or lined with bluish green mineral in halos. Pieces
19-25: < 1%, < 1 mm, round, empty, even distribution.
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh, but with alteration halos. Pieces 14, 15, 17, and 21-24: light
alteration halo with 1 mm-wide black line 2 mm from margin. Piece 16: light
alteration halo with black line 4 mm from margin, minor orange brown clay
on surface. Piece 18; light alteration halo with black line 1-4 mm from
surface, clay on surface, vesicles in halo filled or lined by clay. Piece
25: incipient light alteration halo with black line 5 mm from Upper margin,
clay on Upper surface.
***** VEINS/FRACTURES *****
Piece 15: empty hairline fracture.
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