Leg : 88 Top/Bottom Interval(mm): 0/ 360 Analyst: Natland, J.
Hole: 581C Sample Midpoint (m) : 87.46
Core: H 1 Top of Core Depth (m) : 87.10
Sect: 1 Top of Section Depth(m): 87.10
LITHOLOGY: SEDIMENT (CLAY);
Leg : 88 Top/Bottom Interval(mm): 360/ 450 Analyst: Natland, J.
Hole: 581C Sample Midpoint (m) : 87.55
Core: H 1 Top of Core Depth (m) : 87.10
Sect: 1 Top of Section Depth(m): 87.46
LITHOLOGY: BASALT;
Piece No. : PCE 1 (38-43);
Texture : WELL-ROUNDED COBBLE, GLACIAL ERRATIC, VESICULAR;
Comments : CORE 1 CAME UP IN BOTTOM OF THIS BARREL BUT WAS
CALLED CORE 1 SO IT WOULD HAVE A PROPER DEPTH FOR
THE BASALT;
Vesicles : VESICULAR;
Leg : 88 Top/Bottom Interval(mm): 450/1500 Analyst: Natland, J.
Hole: 581C Sample Midpoint (m) : 88.60
Core: H 1 Top of Core Depth (m) : 87.10
Sect: 1 Top of Section Depth(m): 87.55
LITHOLOGY: SEDIMENT (CHERT);
Leg : 88 Top/Bottom Interval(mm): 0/1500 Analyst: Natland, J.
Hole: 581C Sample Midpoint (m) : 359.10
Core: 1 Top of Core Depth (m) : 357.60
Sect: 1 Top of Section Depth(m): 357.60
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (4-11), 2 (13-17), 3 (19-25), 4 (27-35),
5 (37-42), 6 (44-50), 7 (51-58), 8A (60-80),
8B (81-105), 8C (105-109), 8D (109-116),
8E (116-129), 9A (131-140), 9B (142-144),
9C (145-148);
Texture : APHYRIC;
Structure : PCES 1-7 INTENSELY FRACTURED WITH FE.HYDROXIDE VEINS
FOLLOWED BY CALCITE, PCE 7 HAS NUMEROUS PARALLEL AND
ONE CROSS-CUTTING BRANCHING FRACTURE LINED WITH
CALCITE, PCES 8&9 ARE MASSIVE WITH FEW FRACTURES;
Alteration : MOD
HALOS NEXT TO FRACTURES IN PCES 8A&B&E;
Comments : PCE 1 HAS FLAT-TOPPED COOLING MARGIN, THIS CORE WAS
BROUGHT UP WITH PREVIOUS CORE H2;
Replacement: FERROUS HYDROX MINS
CALCITE
IN VEINS AND FRACTURES;
Leg : 88 Top/Bottom Interval(mm): 120/ 160 Analyst: Natland, J.
Hole: 581C Sample Midpoint (m) : 359.76
Core: 2 Top of Core Depth (m) : 359.60
Sect: 1 Top of Section Depth(m): 359.72
LITHOLOGY: SEDIMENT (CHERT);
Piece No. : PCE 2 (12-16);
Leg : 88 Top/Bottom Interval(mm): 0/1500 Analyst: Natland, J.
Hole: 581C Sample Midpoint (m) : 361.10
Core: 2 Top of Core Depth (m) : 359.60
Sect: 1 Top of Section Depth(m): 359.60
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (3-10), 3A (18-27), 3B (27-35), 3C (35-52),
4A (55-82), 4B (82-110), 4C (110-122), 4D (115-131),
4E (131-139), 4F (139-143), 5 (146-150);
Texture : APHYRIC, BRECCIAS DEVELOPED IN 2-3CM WIDE FRACTURE
CONTAIN CHIPS OF GLASS and FE.HYDROXIDES and DARK GREEN
SAPONITE and ALTERED PALE GREEN GLASS?, FRAGMENTS IN
BRECCIA ARE ROUNDED;
Structure : MASSIVE, BRECCIA IN PCES 3B&4B IS BEDDED, INTENSELY
FRACTURED, VEINS FILLED WITH CALCITE and CARBONATE;
Alteration : MOD
CLEAR EVIDENCE OF VEIN MINERAL DISRUPTIONS AND
PROBABLE INTRODUCTION OF FRAGMENTS INTO NEW
CRACKS, CONTAINS ALTERED PALE GREEN GLASS;
Comments : SKETCH OF PCES 4C-5 ON SHIPBOARD FORM;
Replacement: FERROUS HYDROX MINS
SAPONITE
CLAY
DARK GREEN SAPONITE and FE.HYDROXIDE and RED CLAY &
ALTERED BASALT CHIPS IN BRECCIA;
CARBONATE
CALCITE
CARBONATE and CALCITE IN VEINS;
Leg : 88 Top/Bottom Interval(mm): 0/1500 Analyst: Natland, J.
Hole: 581C Sample Midpoint (m) : 362.60
Core: 2 Top of Core Depth (m) : 359.60
Sect: 2 Top of Section Depth(m): 361.10
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (4-7), 2 (8-16), 3 (18-21), 4 (24-31),
5A (34-41), 5B (41-48), 6A (50-56), 6B (56-63),
7 (65-90), 8A (92-102), 8B (102-110), 9A (112-123),
9B (124-134), 10 (136-140);
Texture : APHYRIC, BRECCIAS IN SOME VEINS HAVE LAYERING AND
ORIENTED CHIPS OF ALTERED BASALT AND FE.HYDROXIDES;
Structure : MASSIVE, MYRIAD CROSS-CUTTING VEINS AND FRACTURES,
VEINS FILLED WITH FE.HYDROXIDE and GREEN CLAY &
CALCITE, CALCITE WAS FINAL VEIN MINERAL AND CEMENTED
PREVIOUS VEINS AND BRECCIAS;
Comments : CONTINUATION OF SAME COOLING UNIT;
Replacement: FERROUS HYDROX MINS
CLAY
FE.HYDROXIDE and CLAY CHIPS IN BRECCIA AND VEINS;
CALCITE
FINAL VEIN MINERAL;
CARBONATE
Leg : 88 Top/Bottom Interval(mm): 0/1370 Analyst: Natland, J.
Hole: 581C Sample Midpoint (m) : 363.97
Core: 2 Top of Core Depth (m) : 359.60
Sect: 3 Top of Section Depth(m): 362.60
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (3-10), 2 (12-20), 3A (22-35), 3B (35-64),
4A (66-70), 4B (70-73), 4C (73-77), 4D (77-87),
5 (89-98), 6A (101-112), 6B (112-126), 6C (125-136);
Texture : APHYRIC, COARSE-GRAINED AT TOP TO FINER-GRAINED TO
62CM AND THEN COARSENING DOWNWARD AGAIN, TWO CALCITE
CEMENTED VEIN BRECCIAS IN PCES 1&5;
Structure : MASSIVE, FRACTURES LINED WITH RED CLAY and CALCITE &
DARK GREEN CLAY IN THAT ORDER;
Alteration : MOD
OXIDATIVE STAINING MORE PROMINENT IN FINER-GRAINED
ROCKS;
Comments : PROBABLE COOLING UNIT TRANSITION AT 65CM;
Replacement: CALCITE
CLAY
RED AND DARK GREEN CLAYS AND CALCITE IN VEINS;
FERROUS HYDROX MINS
IN BRECCIA;
Leg : 88 Top/Bottom Interval(mm): 0/1300 Analyst: Natland, J.
Hole: 581C Sample Midpoint (m) : 365.40
Core: 2 Top of Core Depth (m) : 359.60
Sect: 4 Top of Section Depth(m): 364.10
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (3-12), 1B (11-24), 1C (23-25), 1D (25-37),
1E (37-60), 1F (60-68), 1G (68-95), 2 (98-128);
Texture : APHYRIC;
Structure : MASSIVE, COMPLEX CROSS-CUTTING VEINS IN PCES 1E-G,
LARGE VEINS WITH FE.HYDROXIDES and GREEN CLAYS &
CALCITE, NO VEINS IN PCE 2;
Alteration : MOD TO FRESH
SOME ORANGE STAINING OF ROCK;
MOD
0-74CM;
FRESH
74-130CM;
Replacement: CALCITE
FERROUS HYDROX MINS
CLAY
Leg : 88 Top/Bottom Interval(mm): 0/1500 Analyst: Natland, J.
Hole: 581C Sample Midpoint (m) : 367.10
Core: 2 Top of Core Depth (m) : 359.60
Sect: 5 Top of Section Depth(m): 365.60
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (3-39), 1B (39-57), 2A (60-80), 2B (80-95),
3A (97-110), 3B (110-124), 3C (124-130),
4 (133-136), 5 (137-145);
Texture : APHYRIC, BRECCIA-VEIN IN PCE 3B WITH ROUNDED CHIPS
OF FE.HYDROXIDE CEMENTED BY CALCITE;
Structure : MASSIVE, LESS VEINED THAN BEFORE BUT SAME VEIN
MATERIALS;
Alteration : MOD;
Replacement: FERROUS HYDROX MINS
CHIPS IN BRECCIA;
CALCITE
CEMENTS FE.HYDROXIDE CHIPS;
Leg : 88 Top/Bottom Interval(mm): 0/1500 Analyst: Natland, J.
Hole: 581C Sample Midpoint (m) : 370.30
Core: 3 Top of Core Depth (m) : 368.80
Sect: 1 Top of Section Depth(m): 368.80
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (3-30), 1B (30-60), 1C (61-75), 1D (75-90),
1E (89-146);
Texture : APHYRIC;
Structure : MASSIVE, SOME VEINS NEAR TOP, LARGE 2-3CM VEIN IN
PCE 1D FILLED WITH FE.HYDROXIDE AT TOP AND CALCITE
NEAR BOTTOM;
Alteration : MOD;
Replacement: CALCITE
FERROUS HYDROX MINS
IN VEINS;
Leg : 88 Top/Bottom Interval(mm): 0/1350 Analyst: Natland, J.
Hole: 581C Sample Midpoint (m) : 371.65
Core: 3 Top of Core Depth (m) : 368.80
Sect: 2 Top of Section Depth(m): 370.30
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (3-80), 1B (80-110), 1C (110-127),
1D (127-135);
Texture : APHYRIC;
Structure : MASSIVE, ONE FE.HYDROXIDE VEIN IN PCE 1C, NO VEINS
OR FRACTURES IN PCES 1A-B;
Alteration : MOD;
Replacement: FERROUS HYDROX MINS
IN VEIN;
Leg : 88 Top/Bottom Interval(mm): 0/1400 Analyst: Natland, J.
Hole: 581C Sample Midpoint (m) : 373.20
Core: 3 Top of Core Depth (m) : 368.80
Sect: 3 Top of Section Depth(m): 371.80
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (3-26), 1B (26-42), 1C (41-50), 1D (52-64),
1E (65-118), 1F (118-140);
Texture : APHYRIC;
Structure : MASSIVE, TWO NARROW VEINS;
Alteration : MOD;
Leg : 88 Top/Bottom Interval(mm): 0/1500 Analyst: Natland, J.
Hole: 581C Sample Midpoint (m) : 374.80
Core: 3 Top of Core Depth (m) : 368.80
Sect: 4 Top of Section Depth(m): 373.30
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (3-31), 1B (31-52), 2 (55-64), 3 (66-74),
4A (76-90), 4B (90-96), 5A (99-105), 5B (105-115),
5C (115-124), 5D (124-126), 6 (128-130),
7 (132-145), 8 (147-150);
Texture : APHYRIC, PCES 5C&D HAVE POSSIBLE GLASSY RIND;
Structure : MASSIVE ABOVE 54CM, PILLOW FRAGMENTS BELOW 54CM,
FRACTURES LINED WITH FE.HYDROXIDES;
Alteration : MOD TO FRESH
STRONGLY OXIDIZED RED HALOS NEXT TO FRACTURES,
ALTERED GLASS IN PCES 5C&D;
MOD
3-122CM;
FRESH
122-150CM;
Replacement: FERROUS HYDROX MINS
LINES FRACTURES;
Leg : 88 Top/Bottom Interval(mm): 0/1500 Analyst: Natland, J.
Hole: 581C Sample Midpoint (m) : 376.30
Core: 3 Top of Core Depth (m) : 368.80
Sect: 5 Top of Section Depth(m): 374.80
LITHOLOGY: APHYRIC PILLOW BASALT;
Piece No. : PCE 1 (2-8), 2A (11-16), 2B (16-22), 2C (20-38),
2D (39-46), 2E (46-52), 2F (52-75), 2G (75-85),
2H (85-95), 2I (95-103), 3A (106-121), 3B (121-135),
3C (133-145);
Texture : APHYRIC, PROBABLY A MARGIN AT TOP OF PCE 3B;
Structure : PILLOWS, MOST VEINS FILLED WITH RED FE.HYDROXIDES;
Alteration : MOD
DARK HALOS NEAR MOST VEINS;
Vesicles :
Location: Filling: CALCITE
SOME LARGE CALCITE-FILLED VUGS;
Replacement: FERROUS HYDROX MINS
IN VEINS;
CALCITE
IN VUGS;
Leg : 88 Top/Bottom Interval(mm): 0/1500 Analyst: Natland, J.
Hole: 581C Sample Midpoint (m) : 377.80
Core: 3 Top of Core Depth (m) : 368.80
Sect: 6 Top of Section Depth(m): 376.30
LITHOLOGY: APHYRIC PILLOW BASALT;
Piece No. : PCE 1A (3-7), 1B (7-16), 1C (16-23), 1D (23-30),
2 (33-36), 3 (39-41), 4 (44-50), 5 (53-59),
6A (62-67), 6B (67-71), 7 (74-77), 8 (80-83),
9A (85-90), 9B (90-99), 9C (99-103), 9D (103-109),
9E (109-115), 9F (115-124), 9G (124-140),
9H (141-149);
Texture : APHYRIC, PCE 1 APPEARS TO HAVE GLASSY RINDS;
Structure : PILLOWS, VEINS;
Alteration : MOD
PCE 1 IS ALTERED ON ONE SIDE, DARK HALOS NEXT TO
VEINS;
Comments : OTHER COOLING UNITS NOT EVIDENT ON THE BASIS OF
GRAIN SIZE BUT SEVERAL MAY BE PRESENT;
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