Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1073.20
Core: 93 Top of Core Depth (m) : 1071.70
Sect: 1 Top of Section Depth(m): 1071.70
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1A (2-4), 1B (4-6), 1C (7-9), 2 (21-25),
3 (30-32), 4A (35-50), 4B (50-74), 5 (77-90),
6 (95-107), 7 (110-120), 8A (123-130), 8 (130-148);
Texture : APHYRIC, GRANULAR TEXTURE (MEDIUM-GRAINED: GRAIN
SIZE 1MM), POSSIBLE MICROGLOMEROPHYRIC OL/PYX OCCUR
AS DARK SPOTS (ESPECIALLY IN PCE 2), HOMOGENEOUS;
Structure : POORLY DEVELOPED CONJUGATE SET OF 2-4MM WIDE PYRITE
AND DARK GREEN SAPONITE VEINS IN PCES 4&8 (PYRITIZED
MINOR FRACTURES), VEINS DIP AT 30-DEGREES;
Comments : PCES 1A-C ARE SEDIMENT CAVINGS, PCES 2&3 ARE
POSSIBLE CAVINGS, BASALT IS MEDIUM-BLUISH GRAY
(5B 5/1), ENTIRE CORE REPRESENTS PART OF COOLING
UNIT 45 (FOLLOWING LEG 61), POSSIBLE LAVA FLOW;
Replacement: ZEOLITE
INTERVAL 10-15CM CONTAINS 2 PCES OF BROWN
(5YR 4/4 and 10YR 3/2) ZEOLITIC CLAYSTONE;
PYRITE
IN VEINS AND MINOR FRACTURES;
SAPONITE
IN VEINS;
Leg : 89 Top/Bottom Interval(mm): 0/ 810 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1074.01
Core: 93 Top of Core Depth (m) : 1071.70
Sect: 2 Top of Section Depth(m): 1073.20
LITHOLOGY: PYX SPARSELY TO MODERATELY MICROPHYRIC BASALT;
SAME LITHOLOGY AS SEC 1;
Piece No. : PCE 1 (2-20), 2 (24-40), 3 (43-49), 4 (53-60),
5 (65-77);
Texture : SPARSELY TO MODERATELY MICROPHYRIC, HOMOGENEOUS;
Structure : PYRITE AND CLAY VEINS IN PCES 2&5, SPASMODIC VERY
THIN PYRITE VEINS ONLY SEEN UNDER BINOCULAR
MICROSCOPE IN MOST PCES;
Comments : SAME COOLING UNIT AS SEC 1 (UNIT 45) AS NO OBVIOUS
INTERNAL JUNCTIONS, MEDIUM-BLUISH GRAY(5B 5/1), PCES
3&4 MAY HAVE BEEN INTERCHANGED;
Phenocrysts: PYROXENE
Replacement: PYRITE
IN VEINS;
CLAY
IN VEINS;
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1078.10
Core: 94 Top of Core Depth (m) : 1076.60
Sect: 1 Top of Section Depth(m): 1076.60
LITHOLOGY: PYX SPARSELY TO MODERATELY MICROPHYRIC BASALT;
CORE 94 IS SIMILAR TO CORE 93;
Piece No. : PCE 1 (1-13), 2A (16-22), 2B (22-31), 2C (31-40),
2D (31-67), 2E (67-77), 2F (77-88), 2G (88-90),
2H (88-105), 3 (108-125), 4A (129-146),
4B (142-148);
Texture : SPARSELY TO MOD MICROPHYRIC, HOMOGENEOUS, SLIGHT
VARIATION IN RATIO OF FELSICS TO MAFICS, PCE 3 IS
MORE FELSIC THAN OTHERS;
Structure : PYRITE AND CLAY VEINS, SOME IRREGULAR FRACTURES,
THIN (1MM) FELSPATHIC VEIN IN PCE 3;
Comments : MEDIUM-BLUISH GRAY(5B 5/1), ENTIRE CORE IS PART OF
COOLING UNIT 45;
Phenocrysts: PYROXENE
SLIGHT VARIATION IN DENSITY OF PHENOS;
Replacement: PYRITE
IN VEINS;
CLAY
IN VEINS;
FELDSPAR
FELSPATHIC VEIN IN PCE 3;
Leg : 89 Top/Bottom Interval(mm): 0/1480 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1079.58
Core: 94 Top of Core Depth (m) : 1076.60
Sect: 2 Top of Section Depth(m): 1078.10
LITHOLOGY: APHYRIC TO PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1 (1-9), 2A (12-17), 2B (17-30), 2C (30-34),
2D (35-45), 2E (45-53), 2F (53-61), 2G (62-71),
3A (75-83), 3B (84-93), 4 (96-100), 5A (103-114),
5B (114-120), 5C (120-128), 5D (129-136),
5E (136-145);
Texture : APHYRIC TO SPARSELY MICROPHYRIC, HOMOGENEOUS,
RELATIVELY COARSE-GRAINED FOR A BASALT, LITTLE
VARIATION EXCEPT RELATIVE PROPORTION OF FELSICS TO
MAFICS AND THEN VERY MINOR AND SIMILAR TO SEC 1;
Structure : NUMEROUS PYRITE-BEARING VEINS ARE GENERALLY STEEP
WITH SOME SUBHORIZONTAL;
Comments : PART OF UNIT 45, MEDIUM-BLUISH GRAY(5B 5/1);
Phenocrysts: PYROXENE
Replacement: PYRITE
IN VEINS;
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1081.10
Core: 94 Top of Core Depth (m) : 1076.60
Sect: 3 Top of Section Depth(m): 1079.60
LITHOLOGY: PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1A (1-9), 1B (10-18), 1C (18-28), 1D (28-42),
1E (42-57), 1F (57-65), 1G (65-77), 2A (80-91),
2B (91-99), 2C (97-106), 2D (106-115), 2E (115-122),
2F (122-134), 3 (138-147);
Texture : SPARSELY MICROPHYRIC, HOMOGENEOUS, VERY MINOR
CHANGES IN GRAIN SIZE AND FELSIC/MAFIC RATIO;
Structure : SLICKENSIDES IN PCE 2E and ON CLAY IN PCE 2C, VEINS
FILLED WITH DARK GREEN SOFT CLAY (SAPONITE?);
Comments : PART OF UNIT 45, MEDIUM-BLUISH GRAY(5B 5/1);
Phenocrysts: PYROXENE
Replacement: SAPONITE
IN VEINS, ID UNCERTAIN--MAY BE CHLORITE OR
SMECTITE;
Leg : 89 Top/Bottom Interval(mm): 0/1480 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1082.58
Core: 94 Top of Core Depth (m) : 1076.60
Sect: 4 Top of Section Depth(m): 1081.10
LITHOLOGY: PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1A (0-13), 1B (15-23), 1C (25-28), 2 (31-50),
3A (54-62), 3B (62-70), 3C (70-85), 3D (86-95),
3E (95-106), 4 (110-147);
Texture : SPARSELY MICROPHYRIC, HOMOGENEOUS;
Structure : NO INTERNAL JUNCTIONS, PYRITE-SAPONITE VEINLETS--
LARGELY INFILLING FRACTURES;
Comments : MEDIUM-BLUISH GRAY(5B 5/1), PART OF UNIT 45;
Phenocrysts: PYROXENE
Replacement: PYRITE
IN VEINLETS;
SAPONITE
IN VEINLETS;
Leg : 89 Top/Bottom Interval(mm): 0/1480 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1084.08
Core: 94 Top of Core Depth (m) : 1076.60
Sect: 5 Top of Section Depth(m): 1082.60
LITHOLOGY: PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1A (1-10), 1B (10-15), 1C (15-25), 1D (25-30),
1E (30-40), 1F (40-52), 1G (52-70), 1H (52-70),
1I (70-78), 1J (78-85), 1K (86-96), 1L (96-104),
1M (104-109), 2 (125-130), 3A (133-143),
3B (143-147);
Texture : SPARSELY MICROPHYRIC, HOMOGENEOUS;
Structure : VERTICAL SAPONITE VEIN IN 14-84CM and 87-97CM CONTAINS
VARIABLE PYRITE (2MM THICK IN PCE 1D) SURROUNDED BY
A CHLORITE MARGIN;
Comments : MEDIUM BLUISH GRAY(5B 5/1), PART OF UNIT 45,
INTERVAL 110-123 IS VOID;
Phenocrysts: PYROXENE
Replacement: PYRITE
IN VEIN;
SAPONITE
VERTICAL SAPONITE VEIN CONTAINS PYRITE and CHLORITE;
CHLORITE
MARGIN ON VEIN;
Leg : 89 Top/Bottom Interval(mm): 0/1430 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1085.53
Core: 94 Top of Core Depth (m) : 1076.60
Sect: 6 Top of Section Depth(m): 1084.10
LITHOLOGY: PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1 (2-9), 2 (7-20), 3 (25-32), 4 (35-67),
5 (72-77), 6 (81-87), 7 (91-98), 8 (102-111),
9 (117-126), 10 (131-142);
Texture : SPARSELY MICROPHYRIC, HOMOGENEOUS;
Structure : NO INTERNAL JUNCTIONS, MINOR CLAY (SAPONITE?) AND
PYRITE VEINS;
Comments : MEDIUM BLUISH GRAY(5B 5/1), PART OF UNIT 45;
Phenocrysts: PYROXENE
Replacement: PYRITE
IN VEINS;
SAPONITE
ID UNCERTAIN, IN VEINS;
Leg : 89 Top/Bottom Interval(mm): 0/ 660 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1086.26
Core: 94 Top of Core Depth (m) : 1076.60
Sect: 7 Top of Section Depth(m): 1085.60
LITHOLOGY: PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1A (1-25), 1B (26-37), 2 (41-48), 3 (54-64);
Texture : SPARSELY MICROPHYRIC, HOMOGENEOUS;
Structure : NUMEROUS VEINLETS AND INFILLED FRACTURES CONTAINING
DARK SAPONITE and PYRITE, WHOLE CORE IS MICROFRACTURED
AND VEINED INCREASING WITH DEPTH TO A MAX IN SEC 5,
MOST FRACTURES IN CORE DIP AT 50-DEGREES AND ARE CUT
BY LATER SET OF SUBHORIZONTAL FRACTURES (NO PYRITE);
Comments : MEDIUM BLUISH GRAY(5B 5/1), PART OF UNIT 45;
Phenocrysts: PYROXENE
PHENOS RANDOMLY DISTRIBUTED;
Replacement: PYRITE
IN VEINLETS AND FRACTURES;
SAPONITE
DARK, IN VEINLETS AND FRACTURES;
Leg : 89 Top/Bottom Interval(mm): 0/1470 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1087.17
Core: 95 Top of Core Depth (m) : 1085.70
Sect: 1 Top of Section Depth(m): 1085.70
LITHOLOGY: APHYRIC TO PYX SPARSELY MICROPHYRIC BASALT;
CORE 95 SIMILAR TO CORE 94;
Piece No. : PCE 1 (0-2), 2A (4-8), 2B (8-12), 3 (15-25),
4A (27-38), 4B (38-46), 5 (49-57), 6A (60-68),
6B (69-80), 6C (80-103), 6D (103-106), 6E (106-124),
6F (125-131), 6G (127-139), 6H (139-146);
Texture : APHYRIC TO SPARSELY MICROPHYRIC, HOMOGENEOUS;
Structure : NUMEROUS VERY THIN (<0.5MM) SAPONITE AND PYRITE
VEINLETS, MOST VEINLETS FORM A STEEPLY DIPPING
CONJUGATE SET TOGETHER WITH A FEW SUBHORIZONTAL
VEINLETS, AT 80-90CM SOFT WHITE ZEOLITE? VEINLETS,
PCE 2A CONTAINS A 2MM-THICK PYX-RICH SUBHORIZONTAL
LAYER;
Comments : MEDIUM BLUISH GRAY(5B 5/1), PART OF UNIT 45;
Phenocrysts: PYROXENE
PYX-RICH LAYER IN PCE 2A;
Replacement: PYRITE
IN VEINLETS;
SAPONITE
IN VEINLETS;
ZEOLITE
ID UNCERTAIN, IN VEINLETS AT 80-90CM;
Leg : 89 Top/Bottom Interval(mm): 0/1420 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1088.62
Core: 95 Top of Core Depth (m) : 1085.70
Sect: 2 Top of Section Depth(m): 1087.20
LITHOLOGY: APHYRIC TO PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1A (0-10), 1B (10-25), 1C (25-35), 1D (35-44),
1E (44-48), 1F (50-58), 1G (60-75), 1H (75-85),
1I (85-95), 1J (95-107), 1K (107-132), 1L (133-138),
1M (139-142);
Texture : APHYRIC TO SPARSELY MICROPHYRIC, HOMOGENEOUS, LESS
PHYRIC THAN SEC 1;
Structure : PYRITE-SAPONITE VEINLETS MAINLY SUBHORIZONTAL AND
THINNER THAN IN CORE 94;
Comments : MEDIUM BLUISH GRAY(5B 5/1), PART OF UNIT 45;
Phenocrysts: PYROXENE
Replacement: PYRITE
IN VEINLETS;
SAPONITE
IN VEINLETS;
Leg : 89 Top/Bottom Interval(mm): 0/1470 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1090.17
Core: 95 Top of Core Depth (m) : 1085.70
Sect: 3 Top of Section Depth(m): 1088.70
LITHOLOGY: APHYRIC TO PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1A (1-3), 1B (5-13), 2 (16-18), 3A (20-31),
3B (32-35), 3C (35-45), 3D (45-51), 3E (52-54),
3F (54-60), 3G (60-67), 3H (67-70), 3I (71-78),
3J (78-83), 3K (84-88), 3L (88-94), 3M (94-98),
3N (99-115), 3O (115-133), 3P (132-141),
3Q (141-147);
Texture : APHYRIC TO SPARSELY MICROPHYRIC, HOMOGENEOUS;
Structure : MOST PYRITE-SAPONITE VEINLETS ARE SUBHORIZONTAL, ON
BROKEN SURFACES PYRITE CUBES SCATTERED IN DARK SOFT
CHLORITE FLAKES, CONJUGATE ZEOLITE? VEINLETS IN PCES
3O&3P;
Comments : MEDIUM BLUISH GRAY(5B 5/1), PART OF UNIT 45;
Phenocrysts: PYROXENE
SOME VARIATION IN PHENO DENSITY;
Replacement: PYRITE
IN VEINLETS;
SAPONITE
IN VEINLETS;
ZEOLITE
ID UNCERTAIN, IN VEINLETS IN PCES 3O&P;
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1091.70
Core: 95 Top of Core Depth (m) : 1085.70
Sect: 4 Top of Section Depth(m): 1090.20
LITHOLOGY: APHYRIC TO PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1A (0-12), 1B (17-41), 1C (41-51), 1D (51-58),
1E (58-66), 1F (66-75), 1G (75-82), 1H (82-88),
1I (89-98), 1J (98-106), 1K (106-115), 1L (115-123),
1M (123-134), 1N (135-143), 1O (143-150);
Texture : APHYRIC TO SPARSELY MICROPHYRIC, HOMOGENEOUS;
Structure : MOST SUBHORIZONTAL FRACTURES INFILLED WITH PYRITE &
SAPONITE, DENSITY OF FRACTURES INCREASES WITH DEPTH
(TOP OF SEC 4 HAS 1-2 PER 10CM BUT BASE OF SEC HAS
5 PER 1CM), STEEP AND VERTICAL VEINLETS LESS
EVIDENT;
Comments : MEDIUM BLUISH GRAY(5B 5/1), PART OF UNIT 45;
Phenocrysts: PYROXENE
Replacement: PYRITE
IN VEINS;
SAPONITE
IN VEINS;
Leg : 89 Top/Bottom Interval(mm): 0/ 640 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1092.34
Core: 95 Top of Core Depth (m) : 1085.70
Sect: 5 Top of Section Depth(m): 1091.70
LITHOLOGY: APHYRIC TO PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1A (0-2), 1B (3-8), 1C (10-16), 2A (18-32),
2B (33-35), 3 (40-52), 4 (55-67);
Texture : APHYRIC TO SPARSELY MICROPHYRIC, HOMOGENEOUS,
CHILLED BASE TO UNIT 45, IN 55-64CM PHENO DENSITY
DECREASES AND BASALT MARGINALLY FINER-GRAINED;
Structure : NUMEROUS HORIZONTAL CLOSELY-SPACED FRACTURES IN PCES
1B-2B;
Comments : MEDIUM BLUISH GRAY(5B 5/1), BASE OF UNIT 45, PCES
4&5 ALSO CONTAIN TOP OF UNIT 46;
Phenocrysts: PYROXENE
PHENO DENSITY DECREASES IN 55-64CM;
Leg : 89 Top/Bottom Interval(mm): 640/1100 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1092.80
Core: 95 Top of Core Depth (m) : 1085.70
Sect: 5 Top of Section Depth(m): 1092.34
LITHOLOGY: OL-PYX GLOMEROPHYRIC BASALT;
Piece No. : PCE 4 (55-67), 5A (72-82), 5B (85-96), 5C (97-110);
Texture : GLOMEROPHYRIC, FINE-GRAINED;
Structure : VERTICAL HYALOCLASTITE ZONE (GREEN SMECTITE-REPLACED
SPALLED SHARDS IN CARBONATE MATRIX);
Alteration : MOD
INTERVAL 64-80CM AT CONTACT OF UNITS 45&46;
Comments : CHILLED UPPER FLOW TOP TO NEXT UNIT (UNIT 46);
Phenocrysts: PYROXENE
OLIVINE
Replacement: SMECTITE
SMECTITE-REPLACED SPALLED SHARDS;
Leg : 89 Top/Bottom Interval(mm): 1100/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1093.20
Core: 95 Top of Core Depth (m) : 1085.70
Sect: 5 Top of Section Depth(m): 1092.80
LITHOLOGY: PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 5D (110-122), 5E (122-132), 6 (136-146);
Texture : SPARSELY MICROPHYRIC, HOMOGENEOUS;
Structure : THIN SMECTITE-CARBONATE-ZEOLITE INFILLED FRACTURES;
Phenocrysts: PYROXENE
Replacement: SMECTITE
INFILLED FRACTURES;
CARBONATE
INFILLED FRACTURES;
ZEOLITE
INFILLED FRACTURES;
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1094.70
Core: 95 Top of Core Depth (m) : 1085.70
Sect: 6 Top of Section Depth(m): 1093.20
LITHOLOGY: APHYRIC TO OL-PYX SPARSELY PHYRIC BASALT;
Piece No. : PCE 1A (3-11), 1B (12-22), 1C (22-31), 1D (33-49),
1E (50-58), 1F (59-64), 1G (65-78), 1H (79-88),
1I (89-95), 1J (96-104), 1K (105-115), 1L (116-125),
1M (125-135), 1N (136-149);
Texture : APHYRIC TO SPARSELY PHYRIC, HOMOGENEOUS, MARGINALLY
FINER-GRAINED THAN UNIT 45, NEAR-VERTICAL BRECCIATED
ZONE AT 97-109CM WITH DARK MARGIN and GREEN SMECTITE
FRAGMENTS and SOME CARBONATE;
Structure : HORIZONTAL and STEEP PYRITE and SAPONITE INFILLED
FRACTURES THROUGHOUT;
Comments : MEDIUM BLUISH GRAY(5B 5/1);
Phenocrysts: PYROXENE
OLIVINE
RANDOM AND PATCHY PHENO DISTRIBUTION;
Replacement: PYRITE
INFILLED FRACTURES;
SAPONITE
INFILLED FRACTURES;
SMECTITE
AT 97-109CM;
CARBONATE
AT 97-109CM;
Leg : 89 Top/Bottom Interval(mm): 0/ 710 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1095.41
Core: 95 Top of Core Depth (m) : 1085.70
Sect: 7 Top of Section Depth(m): 1094.70
LITHOLOGY: APHYRIC TO OL-PYX SPARSELY PHYRIC BASALT;
Piece No. : PCE 1 (2-5), 2A (8-11), 2B (16-24), 2C (25-32),
2D (32-40), 2E (40-50), 2F (48-50), 2G (50-55),
2H (55-61), 3 (64-71);
Comments : SAME AS SEC 6, PART OF UNIT 46;
Leg : 89 Top/Bottom Interval(mm): 0/1450 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1096.35
Core: 96 Top of Core Depth (m) : 1094.90
Sect: 1 Top of Section Depth(m): 1094.90
LITHOLOGY: OL-PYX SPARSELY MICROPHYRIC BASALT;
ENTIRE CORE HAS SAME LITHOLOGY;
Piece No. : PCE 1A (2-7), 1B (8-18), 1C (18-23), 1D (24-30),
1E (30-36), 1F (37-44), 2A (47-53), 2B (53-61),
2C (61-65), 2D (65-68), 2E (68-76), 2F (76-85),
2G (85-94), 3A (98-102), 3B (103-109), 3C (110-118),
3D (121-127), 3E (128-144);
Texture : SPARSELY MICROPHYRIC, HOMOGENEOUS;
Structure : STEEP (30-TO 40-DEGREE DIP) CURVING PYRITE-SAPONITE-
CARBONATE INFILLED FRACTURES--GENERALLY 1MM WIDE;
Comments : BLUISH GRAY(5B 6/1);
Phenocrysts: PYROXENE
OLIVINE
Replacement: PYRITE
INFILLED FRACTURES;
SAPONITE
INFILLED FRACTURES;
CARBONATE
INFILLED FRACTURES;
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1097.90
Core: 96 Top of Core Depth (m) : 1094.90
Sect: 2 Top of Section Depth(m): 1096.40
LITHOLOGY: OL-PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1A (0-15), 1B (16-27), 1C (27-35), 1D (35-43),
2A (46-59), 2B (60-66), 2C (67-79), 2D (79-87),
2E (87-96), 3A (98-118), 3B (120-129), 3C (130-139),
3D (140-145), 3E (145-150);
Texture : SPARSELY MICROPHYRIC;
Structure : AT 110-137CM IRREGULAR LAYERING OF PYX;
Comments : PART OF UNIT 46;
Phenocrysts: PYROXENE
110-137CM IRREGULAR LAYERING OF PYX;
OLIVINE
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1099.40
Core: 96 Top of Core Depth (m) : 1094.90
Sect: 3 Top of Section Depth(m): 1097.90
LITHOLOGY: OL-PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1A (0-8), 1B (8-15), 1C (15-23), 1D (21-35),
1E (35-45), 1F (45-55), 2A (58-75), 2B (77-91),
3A (95-101), 3B (102-112), 3C (113-120),
3D (125-145);
Texture : SPARSELY MICROPHYRIC, GLOMEROPHYRIC PATCHES, POORLY
LAYERED;
Structure : PCE 2A IS FRACTURED;
Comments : PART OF UNIT 46;
Phenocrysts: PYROXENE
PATCHY DEVELOPMENT OF PHENOS AT 120-146CM;
OLIVINE
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1100.90
Core: 96 Top of Core Depth (m) : 1094.90
Sect: 4 Top of Section Depth(m): 1099.40
LITHOLOGY: OL-PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1A (0-11), 1B (11-21), 1C (21-30), 1D (30-37),
1E (38-45), 2A (50-60), 2B (61-65), 3A (68-73),
3B (73-78), 4A (80-85), 5A (90-95), 6A (99-110),
6B (111-119), 6C (119-123), 6D (123-128),
6E (128-137), 6F (137-150);
Texture : SPARSELY MICROPHYRIC, HOMOGENEOUS, GLOMEROPHYRIC
EXCEPT FOR PATCHES OF PYX PHENOS;
Structure : IRREGULAR PYX LAYERS FROM SUBHORIZONTAL TO 25-DEGREE
DIP;
Comments : PART OF UNIT 46;
Phenocrysts: PYROXENE
PATCHES OF PYX PHENOS;
OLIVINE
Replacement: SULFIDE
SULPHIDE (PYRITE) MAY BE ASSOCIATED IN MATRIX
(E.G. PCES 1A&B) AS WELL AS IN VEINLETS;
Leg : 89 Top/Bottom Interval(mm): 0/1350 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1102.25
Core: 96 Top of Core Depth (m) : 1094.90
Sect: 5 Top of Section Depth(m): 1100.90
LITHOLOGY: OL-PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1A (0-9), 1B (10-17), 2A (21-22), 2B (24-25),
2C (26-27), 3A (30-51), 3B (52-58), 3C (58-65),
3D (65-68), 3E (70-74), 4A (77-85), 4B (85-95),
5 (100-102), 6 (108-117), 7A (120-126),
7B (127-135);
Texture : SPARSELY MICROPHYRIC;
Structure : VEINLETS--MANY INFILLED WITH SAPONITE, LACK OF
PYRITE IN VEINLETS, EN ECHELON SET OF MICROFRACTURES
IN PCE 3A;
Comments : PART OF UNIT 46;
Phenocrysts: PYROXENE
OLIVINE
Replacement: SAPONITE
IN VEINLETS;
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1105.50
Core: 97 Top of Core Depth (m) : 1104.00
Sect: 1 Top of Section Depth(m): 1104.00
LITHOLOGY: APHYRIC TO OL-PYX SPARSELY MICROPHYRIC BASALT;
SAME AS CORE 96;
Piece No. : PCE 1 (0-6), 2A (10-22), 2B (21-27), 2C (30-33),
3A (35-47), 3B (47-59), 3C (60-80), 3D (80-83),
3E (85-90), 3F (90-128), 3G (130-145), 3H (145-150);
Texture : APHYRIC TO SPARSELY MICROPHYRIC, HOMOGENEOUS, PYRITE
FORMS RADIATE PLUMOSE CRYSTALS;
Structure : PYRITE-SAPONITE VEINS;
Comments : BLUISH GRAY(5B 6/1), ENTIRE CORE 97 IS PART OF UNIT
46;
Phenocrysts: PYROXENE
OLIVINE
Replacement: PYRITE
IN VEINS, FORMS RADIATE PLUMOSE XTLS;
SAPONITE
IN VEINS;
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1107.00
Core: 97 Top of Core Depth (m) : 1104.00
Sect: 2 Top of Section Depth(m): 1105.50
LITHOLOGY: OL-PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1A (1-20), 1B (20-25), 2A (29-37), 2B (37-52),
3A (55-57), 3B (57-66), 3C (66-72), 3D (72-79),
3E (80-88), 3F (87-97), 3G (98-113), 3H (113-122),
3I (122-129), 3J (129-140), 3K (140-150);
Texture : SPARSELY MICROPHYRIC;
Structure : STEEP VEINS IN PCE 3H;
Comments : PART OF UNIT 46;
Phenocrysts: PYROXENE
OLIVINE
Replacement: PYRITE
IRREGULAR MASSES OF PYRITE IN MATRIX AND
ASSOCIATED WITH STEEP VEINS;
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1108.50
Core: 97 Top of Core Depth (m) : 1104.00
Sect: 3 Top of Section Depth(m): 1107.00
LITHOLOGY: OL-PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1A (1-14), 1B (12-21), 1C (20-28), 2A (32-43),
2B (40-51), 2C (50-61), 2D (61-67), 2E (67-71),
2F (71-83), 2G (83-96), 3A (103-105), 3B (105-111),
4A (115-118), 4B (118-129), 4C (129-140),
4D (139-150);
Texture : SPARSELY MICROPHYRIC, PYX "LAYERS" and PATCHES IN PCE
4--NOT TRUE LAYERING;
Comments : PART OF UNIT 46;
Phenocrysts: PYROXENE
OLIVINE
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1110.00
Core: 97 Top of Core Depth (m) : 1104.00
Sect: 4 Top of Section Depth(m): 1108.50
LITHOLOGY: OL-PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1A (1-10), 1B (8-18), 1C (18-25), 2A (27-40),
2B (40-48), 3A (52-65), 3B (65-76), 3C (76-82),
4A (85-88), 4B (87-99), 4C (99-114), 4D (114-125),
4E (125-140), 4F (140-150);
Texture : SPARSELY MICROPHYRIC;
Structure : VEIN AT 55CM CONTAINS TWO ZEOLITES (ONE IS WHITE &
PRISMATIC AND THE OTHER IS GRAYISH WHITE RADIATE
MASSES)--XRD SHOWS HEULANDITE and MINOR PHILLIPSITE &
MILKY WHITE QUARTZ;
Comments : PART OF UNIT 46;
Phenocrysts: PYROXENE
OLIVINE
Replacement: ZEOLITE
IN VEIN AT 55CM, INCLUDES HEULANDITE and MINOR
PHILLIPSITE and MILKY WHITE QUARTZ;
Leg : 89 Top/Bottom Interval(mm): 0/1300 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1111.30
Core: 97 Top of Core Depth (m) : 1104.00
Sect: 5 Top of Section Depth(m): 1110.00
LITHOLOGY: OL-PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1 (0-12), 2A (14-30), 2B (28-38), 2C (39-53),
2D (54-64), 2E (64-75), 2F (75-87), 2G (87-105),
3 (108-116), 4 (122-129);
Texture : SPARSELY MICROPHYRIC;
Structure : PYRITE-RICH VEINLETS IN PCES 2F&G;
Comments : PART OF UNIT 46;
Phenocrysts: PYROXENE
OLIVINE
Replacement: PYRITE
PYRITE-RICH VEINLETS;
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1114.70
Core: 98 Top of Core Depth (m) : 1113.20
Sect: 1 Top of Section Depth(m): 1113.20
LITHOLOGY: APHYRIC TO OL-PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1A (0-6), 1B (5-6), 2A (10-16), 2B (16-20),
3A (23-40), 3B (40-50), 4 (52-63), 5 (67-84),
6 (87-90), 7 (93-105), 8A (110-120), 8B (119-124),
9 (127-136), 10 (138-150);
Texture : APHYRIC TO SPARSELY MICROPHYRIC, HOMOGENEOUS;
Structure : VEINLETS ARE EITHER SAPONITE-PYRITE OR FINE-GRAINED
SILICA AND ARE SOMETIMES COLORED GREEN BY SMECTITE
WITH WHITE CARBONATE (CALCITE) MARGINS and VEIN
CENTERS;
Comments : BLUISH GRAY(5B 6/1), ENTIRE CORE IS UNIT 46, SKETCH
OF PCE 10 VEIN IN INITIAL CORE DESCRIPTION;
Phenocrysts: PYROXENE
OLIVINE
Replacement: PYRITE
IN VEINS;
SAPONITE
IN VEINS;
SILICA
IN VEINS;
SMECTITE
GREEN, SOMETIMES IN VEINS;
CALCITE
ON MARGINS and IN CENTERS OF VEINS;
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1116.20
Core: 98 Top of Core Depth (m) : 1113.20
Sect: 2 Top of Section Depth(m): 1114.70
LITHOLOGY: OL-PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1 (0-9), 2 (11-15), 3A (21-26), 3B (26-32),
3C (32-34), 4 (37-42), 5 (45-51), 6 (53-65),
7A (72-74), 7B (74-81), 8 (85-91), 9A (96-102),
9B (102-108), 9C (108-115), 9D (115-119),
9E (119-130), 10A (131-138), 10B (138-146);
Texture : SPARSELY MICROPHYRIC;
Structure : CALCITE-FILLED VEINLETS;
Comments : PART OF UNIT 46;
Phenocrysts: PYROXENE
OLIVINE
Replacement: CALCITE
IN VEINLETS;
Leg : 89 Top/Bottom Interval(mm): 0/1450 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1117.65
Core: 98 Top of Core Depth (m) : 1113.20
Sect: 3 Top of Section Depth(m): 1116.20
LITHOLOGY: OL-PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1 (0-9), 2 (12-19), 3 (22-34), 4 (35-48),
5A (52-53), 5B (54-75), 5C (75-79), 5D (80-87),
6 (90-103), 7A (106-122), 7B (122-128),
7C (130-144);
Texture : SPARSELY MICROPHYRIC;
Structure : CALCITE-QUARTZ-SAPONITE VEIN IN PCE 5 DIPS
30-DEGREES, PYRITE SOMETIMES ASSOCIATED IN ZEOLITE-
BEARING VEINS (EG. PCE 7B), XRD SHOWS CALCITE &
QUARTZ ONLY--NO ZEOLITE;
Comments : PART OF UNIT 46;
Phenocrysts: PYROXENE
OLIVINE
Replacement: CALCITE
IN VEIN IN PCE 5;
QUARTZ
IN VEIN IN PCE 5;
PYRITE
SOMETIMES IN ZEOLITE-BEARING VEINS;
SAPONITE
IN VEIN IN PCE 5;
ZEOLITE
IN VEINS;
Leg : 89 Top/Bottom Interval(mm): 0/1450 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1119.15
Core: 98 Top of Core Depth (m) : 1113.20
Sect: 4 Top of Section Depth(m): 1117.70
LITHOLOGY: APHYRIC TO PYX-OL SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1A (0-9), 1B (9-11), 1C (11-20), 1D (20-27),
2A (31-36), 2B (36-49), 3 (52-57), 4A (60-67),
4B (69-80), 4C (80-93), 4D (95-104), 5A (109-115),
5B (115-122), 5C (122-132), 6 (136-143);
Texture : APHYRIC TO SPARSELY MICROPHYRIC;
Structure : PYRITE-SAPONITE VEINLETS COMMON AS IN OTHER SECS OF
CORE 98, CARBONATE PRESENT IN VEINLETS;
Comments : PART OF UNIT 46;
Phenocrysts: PYROXENE
OLIVINE
Replacement: PYRITE
IN VEINLETS;
SAPONITE
IN VEINLETS;
CARBONATE
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1120.70
Core: 98 Top of Core Depth (m) : 1113.20
Sect: 5 Top of Section Depth(m): 1119.20
LITHOLOGY: APHYRIC TO OL-PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1 (3-6), 2 (9-15), 3 (17-27), 4A (30-32),
4B (32-40), 4C (40-48), 4D (49-50), 5A (52-60),
5B (60-67), 5C (67-78), 5D (79-85), 5E (85-95),
5F (95-103), 6 (106-114), 7A (120-128),
7B (129-137), 8 (140-146);
Texture : APHYRIC TO SPARSELY MICROPHYRIC;
Structure : SUBHORIZONTAL FRACTURES NEAR BASE OF SECTION;
Comments : PART OF UNIT 46;
Phenocrysts: PYROXENE
OLIVINE
Leg : 89 Top/Bottom Interval(mm): 0/ 420 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1121.12
Core: 98 Top of Core Depth (m) : 1113.20
Sect: 6 Top of Section Depth(m): 1120.70
LITHOLOGY: OL-PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1 (0-10), 2 (13-17), 3A (20-31), 3B (32-41);
Texture : SPARSELY MICROPHYRIC, HOMOGENEOUS;
Comments : BLUISH GRAY, PART OF UNIT 46;
Phenocrysts: PYROXENE
OLIVINE
Leg : 89 Top/Bottom Interval(mm): 420/ 700 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1121.40
Core: 98 Top of Core Depth (m) : 1113.20
Sect: 6 Top of Section Depth(m): 1121.12
LITHOLOGY: OL-PYX-PLAG MOD PHYRIC BASALT;
Piece No. : PCE 3C (42-49), 4 (53-56), 5 (60-66);
Texture : MOD PHYRIC, DECREASE IN GRAIN SIZE TO FINE-GRAINED,
PCE 4 IS PYX-PLAG GLOMEROPHYRIC;
Comments : DARK BLUISH GRAY(5B 4/1), INTERNAL UNIT OF UNIT 46;
Phenocrysts: PYROXENE
OLIVINE
PLAGIOCLASE
SPARSE, GRADUAL INCOMING OF PLAG PHENOS WITH NO
JUNCTION DEFINED;
Leg : 89 Top/Bottom Interval(mm): 700/1450 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1122.15
Core: 98 Top of Core Depth (m) : 1113.20
Sect: 6 Top of Section Depth(m): 1121.40
LITHOLOGY: OL-PYX MODERATELY PHYRIC BASALT;
Piece No. : PCE 6 (70-77), 7A (82-89), 7B (90-98), 7C (99-104),
7D (105-113), 8A (115-125), 8B (126-136),
8C (137-145);
Texture : MOD PHYRIC, COARSER-GRAINED THAN INTERVAL 42-70CM;
Comments : PART OF UNIT 46;
Phenocrysts: PYROXENE
OLIVINE
PLAG PHENOS DISAPPEAR;
Leg : 89 Top/Bottom Interval(mm): 0/1100 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1123.30
Core: 98 Top of Core Depth (m) : 1113.20
Sect: 7 Top of Section Depth(m): 1122.20
LITHOLOGY: OL-PYX SPARSELY TO MODERATELY MICROPHYRIC BASALT;
Piece No. : PCE 1 (2-6), 2A (10-14), 2B (15-25), 2C (23-27),
3 (32-36), 4 (42-47), 5 (55-60), 6A (66-77),
6B (77-88), 7 (95-105);
Texture : SPARSELY TO MODERATELY MICROPHYRIC, PCES 3&4 ARE
MARGINALLY FINER-GRAINED WITH ALTERED PYX?
GLOMEROCRYSTS;
Alteration : MOD
PCES 4&7;
Phenocrysts: PYROXENE
ALTERED PYX? GLOMEROCRYSTS IN PCES 3&4;
OLIVINE
Replacement: CLAY
Minerals Replaced: PYX,OL
PCE 4 CONTAINS DARK PYX/OL CLOTS TO GREEN CLAY?;
Leg : 89 Top/Bottom Interval(mm): 0/1100 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1123.40
Core: 99 Top of Core Depth (m) : 1122.30
Sect: 1 Top of Section Depth(m): 1122.30
LITHOLOGY: OL-PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1 (0-7), 2 (10-19), 3 (22-30), 4 (33-43),
5 (45-55), 6 (60-66), 7A (70-75), 7B (75-81),
8 (85-93), 9 (96-103), 10 (105-110);
Texture : SPARSELY MICROPHYRIC, HOMOGENEOUS;
Comments : PART OF UNIT 46;
Phenocrysts: PYROXENE
OLIVINE
Replacement: EPIDOTE
ID UNCERTAIN, DARK GREEN SPHERES OF ACICULAR
CRYSTALS WITHIN STILLBITE TABLETS IN PCE 1;
PUMPELLYITE
ID UNCERTAIN, IN PCE 1;
ZEOLITE
STILLBITE TABLETS IN PCE 1;
Leg : 89 Top/Bottom Interval(mm): 1130/1190 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1123.49
Core: 99 Top of Core Depth (m) : 1122.30
Sect: 1 Top of Section Depth(m): 1123.43
LITHOLOGY: SEDIMENT;
Piece No. : PCE 11A (113-119);
Texture : COMPOSED OF SILT-SIZED FRAGMENTS and PURPLE
SEDIMENTARY CLASTS (1-7MM) and PYX CRYSTALS and SMECTITE
REPLACED GLASS SHARDS?;
Comments : BOUNDARY TO UNITS 46&47, SEE SEDIMENT VISUAL CORE
DESCRIPTION;
Leg : 89 Top/Bottom Interval(mm): 1210/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1123.80
Core: 99 Top of Core Depth (m) : 1122.30
Sect: 1 Top of Section Depth(m): 1123.51
LITHOLOGY: PYX-PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCE 11B (120-125), 12 (128-135), 13 (138-142),
14 (144-148);
Texture : MOD PHYRIC, TOP OF UNIT REPRESENTED BY BLACK SPALLED
GLASS SHARDS IN GREEN SMECTITE and ZEOLITE MATRIX
(ZONE 5MM THICK), FINE-GRAINED ZONE TO ABOUT 140CM,
COARSER-GRAINED AT 140-150CM;
Comments : TOP OF UNIT 47;
Phenocrysts: PYROXENE
OLIVINE
PLAGIOCLASE
PLAG PHENOS DECREASE WITH DEPTH;
Replacement: SMECTITE
ZEOLITE
Leg : 89 Top/Bottom Interval(mm): 0/ 320 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1124.12
Core: 99 Top of Core Depth (m) : 1122.30
Sect: 2 Top of Section Depth(m): 1123.80
LITHOLOGY: PYX-OL-PLAG MOD PHYRIC BASALT;
Piece No. : PCE 1 (0-10), 2 (12-15), 3 (17-22), 4A (25-26),
4B (28-31);
Texture : MOD PHYRIC;
Structure : VEINED BY ZEOLITES WITH SAPONITE MARGINS;
Comments : BASE OF UNIT 47;
Phenocrysts: PYROXENE
OLIVINE
PLAGIOCLASE
Replacement: ZEOLITE
IN VEINS;
SAPONITE
MARGINS;
Leg : 89 Top/Bottom Interval(mm): 320/ 370 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1124.17
Core: 99 Top of Core Depth (m) : 1122.30
Sect: 2 Top of Section Depth(m): 1124.12
LITHOLOGY: SEDIMENT (CLAYSTONE);
Piece No. : PCE 5 (35-36);
Texture : FINE-GRAINED, SMECTITE and CRYSTAL FRAGMENTS?,
ALTERATION ZONE OF FLOW TOP;
Comments : PURPLE and PALE GREEN LAMINATED, UNMETAMORPHOSED, SEE
SEDIMENT VISUAL CORE DESCRIPTION;
Replacement: SMECTITE
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1133.00
Core: 100 Top of Core Depth (m) : 1131.50
Sect: 1 Top of Section Depth(m): 1131.50
LITHOLOGY: APHYRIC TO OL-PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1 (0-3), 2A (5-10), 2B (10-16), 2C (16-20),
3A (23-27), 3B (27-32), 4A (35-41), 4B (41-46),
4C (46-50), 4D (51-52), 4E (53-60), 4F (59-62),
5 (65-74), 6 (76-85), 7 (87-93), 8A (95-98),
8B (98-100), 8C (101-105), 8D (105-112),
9A (115-130), 9B (130-150);
Texture : APHYRIC TO SPARSELY MICROPHYRIC, HOMOGENEOUS;
Structure : CONSIDERABLE ZEOLITE VEINING IN PCES 2-5;
Comments : BLUISH GRAY(5B 6/1), ENTIRE CORE 100 IS UNIT 48;
Phenocrysts: PYROXENE
OLIVINE
Replacement: ZEOLITE
STILLBITE, IN VEINS;
SMECTITE
Minerals Replaced: OLIVINE
BRIGHT GREEN FLAKES PARTLY REPLACE OLIVINE;
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1134.50
Core: 100 Top of Core Depth (m) : 1131.50
Sect: 2 Top of Section Depth(m): 1133.00
LITHOLOGY: APHYRIC TO OL SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1 (0-15), 2A (17-20), 2B (20-32), 2C (32-40),
2D (40-51), 3A (55-78), 3B (74-101), 3C (101-120),
3D (122-140), 3E (142-150);
Texture : APHYRIC TO SPARSELY MICROPHYRIC;
Comments : PART OF UNIT 48;
Phenocrysts: OLIVINE
Replacement: SMECTITE
Minerals Replaced: OLIVINE
GREEN SMECTITE IN MATRIX and REPLACING OLIVINE;
Leg : 89 Top/Bottom Interval(mm): 0/ 770 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1135.27
Core: 100 Top of Core Depth (m) : 1131.50
Sect: 3 Top of Section Depth(m): 1134.50
LITHOLOGY: APHYRIC TO PYX SPARSELY MICROPHYRIC BASALT;
Piece No. : PCE 1A (0-17), 1B (17-29), 1C (30-40), 1D (40-47),
2 (54-60), 3A (64-69), 3B (66-77);
Texture : APHYRIC TO SPARSELY MICROPHYRIC, HOMOGENEOUS, SOME
PYX PHENOS APPEAR TO BE LARGE SUBOPHITIC PYX POOLS
RATHER THAN TRUE PHENOS;
Comments : PART OF UNIT 48, OLIVINE and SMECTITE HAVE DISAPPEARED
RELATIVE TO SEC 2;
Phenocrysts: PYROXENE
Leg : 89 Top/Bottom Interval(mm): 0/1400 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1135.90
Core: 101 Top of Core Depth (m) : 1134.50
Sect: 1 Top of Section Depth(m): 1134.50
LITHOLOGY: APHYRIC BASALT;
SAME LITHOLOGY IN REST OF CORE;
Piece No. : PCE 1A (0-12), 1B (12-23), 2A (25-42), 2B (45-58),
3 (61-73), 4A (76-85), 4B (85-98), 4C (98-110),
4D (110-118), 4E (120-125), 4F (126-134),
4G (135-139);
Texture : APHYRIC, RELATIVELY COARSE-GRAINED FOR A BASALT,
RELATIVELY HOMOGENEOUS;
Structure : DISSEMINATED PYRITE IN VEINS AND MATRIX;
Alteration : MOD
EXCEPT PCE 2A WHICH IS FRESH;
Comments : BLUISH GRAY(5B 6/1), ENTIRE CORE IS PART OF UNIT 48;
Replacement: SMECTITE
CONSIDERABLE DEVELOPMENT OF GREEN SMECTITE
PATCHES;
PYRITE
DISSEMINATED PYRITE IN VEINS AND MATRIX;
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1137.50
Core: 101 Top of Core Depth (m) : 1134.50
Sect: 2 Top of Section Depth(m): 1136.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1A (0-15), 1B (15-28), 1C (28-35), 2A (38-46),
2B (46-58), 2C (59-68), 2D (69-75), 2E (76-95),
2F (97-105), 2G (106-112), 3 (117-128), 4 (131-136),
5 (140-149);
Texture : APHYRIC, GRANULAR;
Structure : VEINS and MATRIX CONTAIN BLUE-GREEN and DARK GREEN
SMECTITE;
Alteration : MOD
INTERVAL 75-150CM;
Comments : PART OF UNIT 48;
Replacement: SMECTITE
IN MATRIX and VEINS;
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1139.00
Core: 101 Top of Core Depth (m) : 1134.50
Sect: 3 Top of Section Depth(m): 1137.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-10), 2A (13-24), 2B (25-31), 2C (32-40),
3 (43-45), 4 (48-55), 5 (57-65), 6A (68-76),
6B (77-79), 7A (82-89), 7B (90-97), 7C (99-105),
8A (109-111), 8B (112-114), 8C (116-118),
9A (122-133), 9B (133-150);
Texture : APHYRIC, GRANULAR, MARGINALLY FINER-GRAINED THAN
SECS 2&4, GRAIN SIZE INCREASES TOWARDS BASE;
Alteration : MOD;
Comments : PART OF UNIT 48;
Replacement: SMECTITE
PATCHES THROUGHOUT;
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1140.50
Core: 101 Top of Core Depth (m) : 1134.50
Sect: 4 Top of Section Depth(m): 1139.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1A (0-13), 1B (15-33), 2A (36-45), 2B (45-55),
2C (55-74), 2D (75-79), 3A (82-89), 3B (90-92),
3C (94-98), 3D (99-105), 3E (105-114), 3F (114-117),
3G (117-132), 3H (133-135), 4 (138-148);
Texture : APHYRIC, COARSER-GRAINED THAN SEC 3;
Structure : GREEN SMECTITE PATCHES and VEINS THROUGHOUT;
Alteration : MOD
INTERVAL 30-150CM;
Comments : PART OF UNIT 48;
Replacement: SMECTITE
PATCHES AND VEINS;
Leg : 89 Top/Bottom Interval(mm): 0/ 880 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1141.38
Core: 101 Top of Core Depth (m) : 1134.50
Sect: 5 Top of Section Depth(m): 1140.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-5), 2 (9-11), 3A (15-23), 3B (25-30),
3C (30-45), 3D (46-55), 3E (56-63), 3F (64-66),
3G (66-79), 3H (80-87);
Texture : APHYRIC;
Alteration : MOD;
Comments : PART OF UNIT 48;
Replacement: SMECTITE
PATCHY ALTERATION THROUGHOUT;
Leg : 89 Top/Bottom Interval(mm): 0/1440 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1144.34
Core: 102 Top of Core Depth (m) : 1142.90
Sect: 1 Top of Section Depth(m): 1142.90
LITHOLOGY: OL-PYX-PLAG SPARSELY TO MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (0-10), 1B (11-20), 1C (20-22), 2A (25-36),
2B (39-51), 2C (51-62), 2D (62-73), 2E (73-82),
2F (82-95), 2G (96-102), 2H (101-113), 2I (113-137),
2J (138-144);
Texture : SPARSELY TO MODERATELY PHYRIC, HOMOGENEOUS;
Structure : FEW HORIZONTAL SMECTITE-FILLED FRACTURES;
Comments : MEDIUM BLUISH GRAY(5B 5/1), SECS 1-4 ARE PART OF
UNIT 48;
Phenocrysts: PYROXENE
OLIVINE
PLAGIOCLASE
Replacement: SMECTITE
FILLS FRACTURES;
Leg : 89 Top/Bottom Interval(mm): 0/1530 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1145.93
Core: 102 Top of Core Depth (m) : 1142.90
Sect: 2 Top of Section Depth(m): 1144.40
LITHOLOGY: OL OR PYX SPARSELY PHYRIC BASALT;
Piece No. : PCE 1A (0-17), 1B (18-26), 1C (26-38), 1D (38-56),
1E (55-77), 2A (80-96), 2B (96-127), 2C (128-141),
2D (141-153);
Texture : SPARSELY PHYRIC, HOMOGENEOUS;
Comments : PART OF UNIT 48;
Phenocrysts: PYROXENE
OLIVINE
PHENOS ARE EITHER PYX OR OL;
Replacement: SMECTITE
Minerals Replaced: OLIVINE PHENOS
PHENOS REPLACED BY GREEN SMECTITE AS PROBABLY
OLIVINE;
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1147.40
Core: 102 Top of Core Depth (m) : 1142.90
Sect: 3 Top of Section Depth(m): 1145.90
LITHOLOGY: OL OR PYX SPARSELY PHYRIC BASALT;
Piece No. : PCE 1 (0-13), 2A (16-47), 2B (47-70), 2C (70-85),
2D (86-99), 3A (102-112), 3B (112-121),
3C (121-128), 3D (138-140), 4 (143-150);
Texture : SPARSELY PHYRIC, HOMOGENEOUS;
Comments : PART OF UNIT 48, SIMILAR TO SECS 1&2;
Phenocrysts: PYROXENE
OLIVINE
PHENOS ARE EITHER PYX OR OL;
Leg : 89 Top/Bottom Interval(mm): 0/ 430 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1147.83
Core: 102 Top of Core Depth (m) : 1142.90
Sect: 4 Top of Section Depth(m): 1147.40
LITHOLOGY: OL-PYX SPARSELY PHYRIC BASALT;
Piece No. : PCE 1A (0-7), 1B (7-13), 1C (14-28), 1D (27-36),
1E (36-43);
Texture : SPARSELY PHYRIC, HOMOGENEOUS, BECOMES FINER-GRAINED
TOWARDS BASE;
Structure : FINE-GRAINED INTERNAL SUBUNIT AT 21-23CM;
Comments : PART OF UNIT 48;
Phenocrysts: PYROXENE
OLIVINE
Leg : 89 Top/Bottom Interval(mm): 430/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1148.90
Core: 102 Top of Core Depth (m) : 1142.90
Sect: 4 Top of Section Depth(m): 1147.83
LITHOLOGY: PYX-PLAG GLOMEROPHYRIC BASALT;
OL PHYRIC BASALT;
Piece No. : PCE 2 (49-54), 3 (57-64), 4 (67-82), 5 (86-90),
6A (94-100), 6B (102-114), 6C (115-120),
6D (124-131), 6E (133-145);
Texture : GLOMEROPHYRIC and PHYRIC, VERY FINE-GRAINED, QUENCH
TEXTURED?, BELOW 65CM GLOMEROPHYRIC TEXTURE
DECREASES AND GRAIN SIZE INCREASES TOWARDS BASE,
3 OLIVINE-RICH LAYERS AT 58&96&132CM;
Alteration : MOD
PCES 3&4&6D;
Comments : ARBITRARY BASE TO UNIT 48 PLACED BELOW TOP OLIVINE
LAYER AT 65CM, SUBUNITS AT TOP OF UNIT 49 AT
80-140CM;
Phenocrysts: PYROXENE
OLIVINE
PLAGIOCLASE
Leg : 89 Top/Bottom Interval(mm): 0/ 500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1149.40
Core: 102 Top of Core Depth (m) : 1142.90
Sect: 5 Top of Section Depth(m): 1148.90
LITHOLOGY: OL-PYX MOD PHYRIC BASALT;
Piece No. : PCE 1 (0-8), 2 (12-20), 3A (23-25), 3B (26-28),
3C (29-33), 3D (34-47);
Texture : MOD PHYRIC, FINE-GRAINED, HOMOGENEOUS;
Comments : POSSIBLY TOP OF A NEW UNIT (UNIT 49?);
Phenocrysts: PYROXENE
OLIVINE
Leg : 89 Top/Bottom Interval(mm): 0/ 550 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1152.55
Core: 103 Top of Core Depth (m) : 1152.00
Sect: 1 Top of Section Depth(m): 1152.00
LITHOLOGY: OL-PYX SPARSELY GLOMEROPHYRIC BASALT;
Piece No. : PCE 1A (0-10), 1B (10-24), 1C (25-32), 1D (32-49),
1E (50-55);
Texture : SPARSELY GLOMEROPHYRIC, FINE-GRAINED, HOMOGENEOUS;
Comments : BLUISH GRAY(5B 6/1), BASE OF UNIT 48 (BASALT
SECTION);
Phenocrysts: PYROXENE
OLIVINE
Leg : 89 Top/Bottom Interval(mm): 550/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1153.50
Core: 103 Top of Core Depth (m) : 1152.00
Sect: 1 Top of Section Depth(m): 1152.55
LITHOLOGY: GLASSY TO OL PHYRIC BASALT;
Piece No. : PCE 2A (60-62), 2B (64-65), 2C (63-64), 3A (68-75),
3B (75-85), 3C (85-95), 3D (95-101), 3E (101-115),
4A (118-127), 4B (127-134), 5A (139-141),
5B (139-143), 5C (144-146);
Texture : PCE 2 IS VERY FINE-GRAINED OR GLASSY, BECOMES
OLIVINE PHYRIC WITH DEPTH;
Comments : TOP OF NEW UNIT (UNIT 50);
Phenocrysts: OLIVINE
Leg : 89 Top/Bottom Interval(mm): 0/ 100 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1153.60
Core: 103 Top of Core Depth (m) : 1152.00
Sect: 2 Top of Section Depth(m): 1153.50
LITHOLOGY: OL MOD PHYRIC BASALT;
Piece No. : PCE 1 (2-9);
Texture : MOD PHYRIC, MAY ALSO BE PYX GLOMEROPHYRIC, COARSER
THAN MAJORITY OF SEC 1;
Comments : PART OF UNIT 50;
Phenocrysts: PYROXENE
ID UNCERTAIN FOR PYX;
OLIVINE
Leg : 89 Top/Bottom Interval(mm): 0/ 410 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1161.61
Core: 104 Top of Core Depth (m) : 1161.20
Sect: 1 Top of Section Depth(m): 1161.20
LITHOLOGY: OL MOD PHYRIC BASALT;
Piece No. : PCE 1 (0-3), 2 (5-15), 3A (18-19), 3B (20-26),
4A (30-41);
Texture : MOD PHYRIC, HOMOGENEOUS;
Comments : BLUISH GRAY(5B 5/1), BASAL UNIT 50;
Vesicles :
Location: Filling: SMECTITE, PYRITE
VESICULAR AT 24-33CM, INFILLED WITH PALE and DARK
GREEN SMECTITE and PYRITE;
Phenocrysts: OLIVINE
Replacement: SMECTITE
IN VESICLES;
PYRITE
IN VESICLES;
Leg : 89 Top/Bottom Interval(mm): 410/1300 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1162.50
Core: 104 Top of Core Depth (m) : 1161.20
Sect: 1 Top of Section Depth(m): 1161.61
LITHOLOGY: OL PHYRIC BASALT;
Piece No. : PCE 4B (41-47), 5 (50-54), 6A (56-58), 6B (59-61),
6C (62-66), 7A (70-75), 7B (75-79), 8A (84-92),
8B (94-100), 9A (102-110), 9B (110-116);
9C (116-129);
Texture : PHYRIC, FINE-GRAINED, CURVED CHILLED MARGINS AT 42 &
70-90CM, GRAIN SIZE INCREASES WITH DEPTH FROM 90CM;
Structure : MASSIVENESS INCREASES WITH DEPTH FROM 90CM;
Comments : ONLY TWO THIN COOLING UNITS WITH CURVED GLASSY
MARGINS SEEN, TOP OF UNIT 51, GRANULAR TOP OF UNIT
MAY BE A CONTACT METAMORPHOSED and RECRYSTALLIZED
HYALOPILITIC-TEXTURED CPX PHYRIC GLASSY BASALT,
OLIVINE FROM TOP OF SEC IS NOW GREEN SMECTITE;
Phenocrysts: OLIVINE
Replacement: SMECTITE
Leg : 89 Top/Bottom Interval(mm): 0/1320 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1164.02
Core: 104 Top of Core Depth (m) : 1161.20
Sect: 2 Top of Section Depth(m): 1162.70
LITHOLOGY: OL SPARSELY TO MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (0-3), 1B (5-6), 1C (7-9), 1D (12-15),
1E (17-19), 1F (20-24), 1G (25-29), 2 (37-45),
3A (49-61), 3B (59-67), 4 (72-80), 5 (84-89),
6A (94-96), 6B (97-100), 6C (101-103), 6D (105-107),
6E (109-122), 7 (127-132);
Texture : SPARSELY TO MODERATELY PHYRIC, CONSIDERABLE
VARIATION IN GRAIN SIZE (FINE TO MEDIUM-GRAINED)
DOWN SECTION FROM PCE TO PCE, CHILLED MARGINS
MISSING--POSSIBLY REMOVED DURING DRILLING;
Structure : POSSIBLE PILLOWED BASALT SEQUENCE;
Comments : PART OF UNIT 51 WITH POSSIBLE BASE TO COOLING UNIT
(IN BASE OF SEC 1) AT ABOUT 20CM;
Phenocrysts: OLIVINE
Replacement: ZEOLITE
STILLBITE, IN PCES 2&3A;
Leg : 89 Top/Bottom Interval(mm): 0/ 60 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1170.36
Core: 105 Top of Core Depth (m) : 1170.30
Sect: 1 Top of Section Depth(m): 1170.30
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (2-7);
Texture : APHYRIC, COARSE-GRAINED, HOMOGENEOUS;
Comments : POSSIBLE BASE OF UNIT 51;
Leg : 89 Top/Bottom Interval(mm): 60/1450 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1171.75
Core: 105 Top of Core Depth (m) : 1170.30
Sect: 1 Top of Section Depth(m): 1170.36
LITHOLOGY: OL-PYX MOD PHYRIC BASALT;
Piece No. : PCE 2A (10-15), 2B (15-29), 2C (29-41), 2D (41-48),
3A (50-52), 3B (53-60), 3C (60-65), 3D (65-73),
3E (73-81), 3F (81-87), 4A (91-100), 4B (100-106),
4C (106-115), 4D (115-123), 5A (130-136),
5B (136-145);
Texture : MOD PHYRIC (POSSIBLY GLOMEROPHYRIC), GRAIN SIZE
DECREASES MARGINALLY DOWN SEC--FINE-GRAINED BELOW
(NEAR BASE OF FLOW UNIT?), OL-RICH LAYER AT 143CM;
Comments : PART OF UNIT 52;
Phenocrysts: PYROXENE
OLIVINE
Replacement: PYRITE
ABUNDANT ON WORKING HALF OF PCE 4D;
Leg : 89 Top/Bottom Interval(mm): 0/1450 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1173.25
Core: 105 Top of Core Depth (m) : 1170.30
Sect: 2 Top of Section Depth(m): 1171.80
LITHOLOGY: OL SPARSELY TO MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (0-16), 1B (17-23), 1C (23-40), 1D (40-62),
1E (62-72), 1F (72-77), 1G (78-90), 1H (90-99),
1I (100-106), 1J (101-112), 1K (110-119),
1L (120-136), 1M (137-145);
Texture : SPARSELY TO MODERATELY PHYRIC, GRAIN SIZE INCREASES
TOWARDS BASE;
Comments : BLUISH GRAY(5B 6/1), EITHER PART OF UNIT 52 OR A
SUBUNIT;
Phenocrysts: OLIVINE
DISTRIBUTION VARIES, MORE TOWARDS BASE OF SEC;
Leg : 89 Top/Bottom Interval(mm): 0/1070 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1174.37
Core: 105 Top of Core Depth (m) : 1170.30
Sect: 3 Top of Section Depth(m): 1173.30
LITHOLOGY: OL SPARSELY TO MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (0-1), 1B (2-9), 1C (10-19), 1D (19-25),
1E (25-30), 1F (30-39), 1G (39-50), 1H (50-80),
2 (83-89), 3 (92-106);
Texture : SPARSELY TO MODERATELY PHYRIC, RELATIVELY COARSE
GRAINED THROUGHOUT;
Comments : PART OF UNIT 52, SAW CUT AT 9CM;
Phenocrysts: OLIVINE
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1175.80
Core: 106 Top of Core Depth (m) : 1174.30
Sect: 1 Top of Section Depth(m): 1174.30
LITHOLOGY: APHYRIC TO OL SPARSELY PHYRIC BASALT;
Piece No. : PCE 1A (2-15), 1B (15-21), 1C (21-30), 1D (30-39),
1E (39-61), 1F (60-68), 1G (68-80), 1H (80-84),
1I (85-87), 1J (89-111), 1K (111-145);
Texture : APHYRIC TO SPARSELY PHYRIC, HOMOGENEOUS, RELATIVELY
COARSE-GRAINED;
Comments : BLUISH GRAY(5B 6/1), PROBABLY PART OF UNIT 52;
Phenocrysts: OLIVINE
PHENOS CONCENTRATED IN PCES 1B-D;
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1177.30
Core: 106 Top of Core Depth (m) : 1174.30
Sect: 2 Top of Section Depth(m): 1175.80
LITHOLOGY: APHYRIC TO OL SPARSELY PHYRIC BASALT;
Piece No. : PCE 1A (0-34), 1B (35-68), 2 (72-75), 3A (77-92),
3B (90-102), 3C (102-125), 3D (125-136),
3E (136-142), 3F (142-150);
Texture : APHYRIC TO SPARSELY PHYRIC, SLIGHT INCREASE IN GRAIN
SIZE AT BASE OF SEC, WHOLE SEC RELATIVELY COARSE FOR
A BASALT;
Comments : PART OF UNIT 52;
Phenocrysts: OLIVINE
Leg : 89 Top/Bottom Interval(mm): 0/ 520 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1177.82
Core: 106 Top of Core Depth (m) : 1174.30
Sect: 3 Top of Section Depth(m): 1177.30
LITHOLOGY: APHYRIC TO OL SPARSELY PHYRIC DOLERITE;
Piece No. : PCE 1A (1-12), 1B (12-22), 2A (25-30), 2B (27-30),
2C (30-33), 2D (32-38), 3 (40-52);
Texture : APHYRIC TO SPARSELY PHYRIC, FINE-GRAINED, COARSER
THAN PREVIOUS SECS, GRAIN SIZE TO 1MM;
Comments : PART OF UNIT 52;
Vesicles : A FEW VUGS AT 0-3CM--SOME ARE LINED WITH SMECTITE;
Phenocrysts: OLIVINE
Replacement: SMECTITE
LINES VUGS AT 0-3CM;
Leg : 89 Top/Bottom Interval(mm): 0/ 100 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1180.50
Core: 107 Top of Core Depth (m) : 1180.40
Sect: 1 Top of Section Depth(m): 1180.40
LITHOLOGY: APHYRIC OL DOLERITE;
Piece No. : PCE 1 (2-7);
Texture : APHYRIC, FINE-GRAINED, HOMOGENEOUS;
Comments : PART OF UNIT 52;
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1191.00
Core: 108 Top of Core Depth (m) : 1189.50
Sect: 1 Top of Section Depth(m): 1189.50
LITHOLOGY: APHYRIC OL DOLERITE;
Piece No. : PCE 1 (0-7), 2A (10-21), 2B (21-32), 2C (33-52),
2D (56-66), 2E (67-79), 2F (80-105), 3 (109-115),
4A (120-130), 4B (130-137), 4C (138-150);
Texture : APHYRIC, FINE-GRAINED, HOMOGENEOUS, MARGINALLY
FINER-GRAINED AT BASE OF SEC THAN AT TOP;
Comments : BLUISH GRAY(5B 6/1), PART OF UNIT 52;
Phenocrysts: OLIVINE
FEW SCATTERED OL PHENOS CONCENTRATED IN PCE 2C;
Replacement: PYRITE
DISSEMINATED;
Leg : 89 Top/Bottom Interval(mm): 0/ 620 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1191.62
Core: 108 Top of Core Depth (m) : 1189.50
Sect: 2 Top of Section Depth(m): 1191.00
LITHOLOGY: APHYRIC TO OL SPARSELY PHYRIC BASALT;
Piece No. : PCE 1A (0-10), 1B (12-19), 1C (20-25), 1D (25-40),
1E (41-55), 1F (57-60);
Texture : APHYRIC TO SPARSELY PHYRIC, COARSE-GRAINED, GRAIN
SIZE DECREASES DOWNWARDS;
Phenocrysts: OLIVINE
Leg : 89 Top/Bottom Interval(mm): 620/ 710 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1191.71
Core: 108 Top of Core Depth (m) : 1189.50
Sect: 2 Top of Section Depth(m): 1191.62
LITHOLOGY: OL-PYX PHYRIC BASALT;
Piece No. : PCE 2A (67-71);
Texture : PHYRIC, VERY FINE-GRAINED, BASAL CHILLED MARGIN TO
UNIT 52;
Comments : BASE OF UNIT 52;
Phenocrysts: OLIVINE
PYROXENE
Leg : 89 Top/Bottom Interval(mm): 710/ 750 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1191.75
Core: 108 Top of Core Depth (m) : 1189.50
Sect: 2 Top of Section Depth(m): 1191.71
LITHOLOGY: GLASSY TO OL PHYRIC BASALT;
Piece No. : PCE 2B (72-97);
Texture : GREEN ALTERED GLASS WITH OL PHENOS COATING VERY
FINE-GRAINED (QUENCHED?) OL PHYRIC BASALT;
Structure : POSSIBLE PILLOW BRECCIA;
Comments : TOP OF UNIT 53;
Phenocrysts: OLIVINE
Leg : 89 Top/Bottom Interval(mm): 750/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1192.50
Core: 108 Top of Core Depth (m) : 1189.50
Sect: 2 Top of Section Depth(m): 1191.75
LITHOLOGY: OL-PYX PHYRIC BASALT;
Piece No. : PCE 2B (72-97), 3A (100-108), 3B (109-116),
4 (120-130), 5 (133-145), 6 (147-150);
Texture : PHYRIC, FINE-GRAINED, GRAIN SIZE INCREASES
DOWNWARDS, QUENCHED BELOW 100CM, BECOMING
HOLOCRYSTALLINE WITH DEPTH;
Structure : POSSIBLE PILLOW;
Phenocrysts: OLIVINE
PYROXENE
Leg : 89 Top/Bottom Interval(mm): 0/ 120 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1192.62
Core: 108 Top of Core Depth (m) : 1189.50
Sect: 3 Top of Section Depth(m): 1192.50
LITHOLOGY: OL-PYX MODERATELY PHYRIC BASALT;
Piece No. : PCE 1 (1-12);
Texture : MOD PHYRIC;
Comments : BASE OF UNIT 53;
Phenocrysts: OLIVINE
PYROXENE
Leg : 89 Top/Bottom Interval(mm): 150/1350 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1193.85
Core: 108 Top of Core Depth (m) : 1189.50
Sect: 3 Top of Section Depth(m): 1192.65
LITHOLOGY: OL-PYX MODERATELY PHYRIC TO PHYRIC BASALT;
Piece No. : PCE 2A (16-17), 2B (19-28), 2C (29-36), 3A (40-45),
3B (45-51), 3C (51-61), 3D (62-71), 3E (73-76),
3F (78-90), 4A (95-98), 4B (100-110), 4C (110-113),
4D (116-133);
Texture : MOD PHYRIC TO PHYRIC (CPX GLOMEROPHYRIC), DARK
CHILLED ZONE ON PCE 2B, GRAIN SIZE INCREASES DOWN TO
100CM (PCE 4A) FOLLOWED BY A DECREASE (PCE 4B) WITH
FINE-GRAINED PHYRIC BASALT;
Structure : POSSIBLE PILLOW LAVA SEQUENCE (INCLUDING UNITS 53 &
54);
Comments : PART OF UNIT 54, COMPOSED OF A NUMBER OF COOLING
UNITS, NEW COOLING UNIT BELOW 100CM;
Phenocrysts: OLIVINE
PYROXENE
SAME PHENO CONCENTRATION THROUGHOUT;
Leg : 89 Top/Bottom Interval(mm): 0/1040 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1199.74
Core: 109 Top of Core Depth (m) : 1198.70
Sect: 1 Top of Section Depth(m): 1198.70
LITHOLOGY: OL-PYX PHYRIC BASALT;
Piece No. : PCE 1A (1-4), 1B (6-8), 1C (10-13), 2 (17-26),
3A (28-31), 3B (31-33), 3C (33-37), 3D (38-40),
4 (43-54), 5A (57-61), 5B (62-77), 6 (79-86),
7 (90-96), 8 (99-108);
Texture : PHYRIC, GRAIN SIZE VARIES FROM FINE TO SLIGHTLY
COARSER DOWN THE SECTION (FINE-GRAINED AT 8-12CM &
73-76CM);
Comments : BLUISH GRAY(5B 6/1), PART OF UNIT 54, PROBABLY TWO
SMALL COOLING UNITS AS IN CORE 108 (BEGINNING AT 0CM
and 75CM), PCE 1A IS SEDIMENT WASH IN SNAP-CAP VIAL;
Phenocrysts: OLIVINE
PYROXENE
Leg : 89 Top/Bottom Interval(mm): 1010/1060 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1199.76
Core: 109 Top of Core Depth (m) : 1198.70
Sect: 1 Top of Section Depth(m): 1199.71
LITHOLOGY: OL-PYX PHYRIC BASALT;
Piece No. : PCE 8 (99-108);
Texture : PHYRIC, UNIT 54 CHILLS AGAINST UNIT 55 BELOW
(WHITISH ZONE 3MM WIDE);
Comments : INCLINED JUNCTION (45-DEGREE DIP) REPRESENTS
BOUNDARY BETWEEN UNITS 54&55, JUNCTION IS
MICROSCOPICALLY IRREGULAR;
Phenocrysts: OLIVINE
PYROXENE
Leg : 89 Top/Bottom Interval(mm): 1100/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1200.20
Core: 109 Top of Core Depth (m) : 1198.70
Sect: 1 Top of Section Depth(m): 1199.80
LITHOLOGY: OL-PYX PHYRIC BASALT;
Piece No. : PCE 9 (112-122), 10A (125-139), 10B (140-149);
Texture : PHYRIC;
Comments : TOP OF UNIT 55, SIMILAR TO UNIT 54;
Phenocrysts: OLIVINE
PYROXENE
Leg : 89 Top/Bottom Interval(mm): 0/1500 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1201.70
Core: 109 Top of Core Depth (m) : 1198.70
Sect: 2 Top of Section Depth(m): 1200.20
LITHOLOGY: OL-PYX MODERATELY PHYRIC BASALT;
Piece No. : PCE 1 (1-10), 2A (13-35), 2B (35-48), 2C (50-55),
2D (56-68), 2E (67-80), 2F (80-90), 2G (90-97),
3 (100-117), 4 (120-123), 5 (127-133), 6 (135-143),
7 (145-150);
Texture : MOD PHYRIC;
Comments : PART OF UNIT 55;
Phenocrysts: OLIVINE
ACCUMULATION OF OL PHENOS AT BASE, NOW ALTERED TO
GREEN SMECTITE;
PYROXENE
Replacement: SMECTITE
Minerals Replaced: OLIVINE
IN PHENOS;
Leg : 89 Top/Bottom Interval(mm): 0/ 400 Analyst: Floyd, P.
Hole: 462A Sample Midpoint (m) : 1202.10
Core: 109 Top of Core Depth (m) : 1198.70
Sect: 3 Top of Section Depth(m): 1201.70
LITHOLOGY: OL-PYX MODERATELY PHYRIC BASALT;
Piece No. : PCE 1 (0-10), 2 (13-16), 3 (20-24), 4 (29-38);
Texture : MOD PHYRIC, GRAIN SIZE VARIES FROM FINE TO COARSE
AND BACK AGAIN, GRAIN SIZE and PHENO CONTENT &
DISTRUBUTION SIMILAR TO UNIT 54, PROBABLY A SERIES
OF THIN FLOWS (OR INTRUSIONS CHILLING AGAINST EACH
OTHER?);
Comments : TOP OF UNIT 56;
Phenocrysts: OLIVINE
PYROXENE
DISTRIBUTION AND CONTENT SIMILAR TO UNIT 54;
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