Leg : 67 Top/Bottom Interval(mm): 0/ 550 Analyst: Cowan, D.S.
Hole: 500 Sample Midpoint (m) : 157.05
Core: 18 Top of Core Depth (m) : 156.50
Sect: 1 Top of Section Depth(m): 156.50
LITHOLOGY: OL-PLAG MICROPHYRIC TO APHYRIC BASALT;
Piece No. : PCES 1 (0-2), 2 (7-14), 3 (16-18), 4 (24-28),
5 (31-36), 6 (39-44), 7 (46-54);
Texture : VERY FINE GRAINED, MICROPHYRIC TO APHYRIC, PCES 6 &
7 ARE VERY FINE GRAINED BUT APHYRIC, PCE 5 HAS A 2CM
GLASSY RIM(5MM THICK), PCES 1 & 2 & 7 HAVE SMALL
(1CM OR LESS) ATTACHED SELVAGES OF SOFT BLUISH WHITE
NANNOFOSSIL CHALK;
Alteration : FRESH
SOME OL PHENOS PROBABLY ALTERED TO CLAY MINERALS
(GREENISH), PCES(1, 2, 4) HAVE CONCENTRIC
WEATHERING RINDS;
Comments : DARK GREY TO BLACK, PCES(1, 2, 4) HAVE TAN OUTER
LAYERS;
Phenocrysts: PLAGIOCLASE ( TO 1%)
Size(mm): 2-3
OLIVINE ( TO 1%)
Size(mm): TO 1
Groundmass : PLAGIOCLASE
MICROLITES;
Replacement: CLAY
PHENOS IN PCES 1-5 IN SOME CASES ALTERED TO
GREENISH CLAY;
Leg : 67 Top/Bottom Interval(mm): 0/ 160 Analyst: Cowan, D.S.
Hole: 500 Sample Midpoint (m) : 158.66
Core: 19 Top of Core Depth (m) : 158.50
Sect: 1 Top of Section Depth(m): 158.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCES 1 (2-9), 2 (11-16);
Texture : PHYRIC;
Structure : CAVITIES ON OUTER SURFACE OF PCE LOCALLY COATED WITH
DRUSES OF SOFT GREEN TO YELLOW-GREEN CLAY;
Alteration : EXT
OL ALTERED TO ORANGE BROWN CLAY TO IRON OXIDES;
Comments : TAN TO BROWN;
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): TO 4
OLIVINE ( 2%)
Size(mm): 2
OL PHENOS ALTERED TO ORANGE BROWN CLAY TO IRON
OXIDES, ID UNCERTAIN FOR OL;
Replacement: CLAY
SOFT GREEN TO YELLOW GREEN;
Leg : 67 Top/Bottom Interval(mm): 180/ 660 Analyst: Cowan, D.S.
Hole: 500 Sample Midpoint (m) : 159.16
Core: 19 Top of Core Depth (m) : 158.50
Sect: 1 Top of Section Depth(m): 158.68
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCES 3 (18-27), 4 (30-45), 5 (47-55), 6 (61-66);
Texture : PHYRIC;
Alteration : FRESH
TAN WEATHERING RIND ON PCES(4, 5, 6), MICROPHENOS
OF OL(?) ALTERED TO ORANGE BROWN CLAY OR GREEN
SOFT CLAY, TAN WEATHERED ZONE 1CM THICK ADJACENT
TO CHALK;
Comments : DARK GREY TO BLACK, ATTACHED TO PCE 4 IS SELVAGE OF
HARD(BAKED?) CREAMY WHITE CHALK, RELICT FORAM TESTS
VISIBLE WITH HAND LENS, CHALK ALSO CONTAINS
SUBROUNDED TO ANGULAR FRAGMENTS OF TAN BASALT AND
DARK GREEN SOFT CLAY CONTAINING PLAG MICROLITES
(PROBABLY WAS GLASSY);
Vesicles : Size(mm): 5 Percent:
Location: Filling: CLAY
PCE 4 CONTAINS VESICLES FILLED WITH GREEN CLAY;
Phenocrysts: PLAGIOCLASE ( 3%)
Size(mm): 2
OLIVINE ( 2%)
ID UNCERTAIN FOR MICROPHENOS SINCE ALTERED TO
ORANGE BROWN CLAY OR SOFT GREEN CLAY;
Groundmass : FELDSPAR
MATRIX WITH FELDSPAR MATRIX;
Replacement: CLAY
Leg : 67 Top/Bottom Interval(mm): 690/ 750 Analyst: Cowan, D.S.
Hole: 500 Sample Midpoint (m) : 159.25
Core: 19 Top of Core Depth (m) : 158.50
Sect: 1 Top of Section Depth(m): 159.19
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 7 (69-75);
Texture : APHYRIC;
Structure : CAVITIES PARTLY LINED WITH DRUSES OF CALCITE AND
PALE GREEN CLAY;
Alteration : MOD
LIGHT GREY WEATHERING RIND;
Comments : DARK GREY;
Vesicles : VESICLES PARTLY LINED WITH DRUSES OF CALCITE AND
PALE GREEN CLAY;
Replacement: CLAY
CALCITE
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