Leg : 64 Top/Bottom Interval(mm): 0/1120 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 519.12
Core: 39 Top of Core Depth (m) : 515.00
Sect: 3 Top of Section Depth(m): 518.00
LITHOLOGY: SEDIMENT;
Leg : 64 Top/Bottom Interval(mm): 1120/1420 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 519.42
Core: 39 Top of Core Depth (m) : 515.00
Sect: 3 Top of Section Depth(m): 519.12
LITHOLOGY: SEDIMENT (SANDSTONE);
Leg : 64 Top/Bottom Interval(mm): 1400/1500 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 519.50
Core: 39 Top of Core Depth (m) : 515.00
Sect: 3 Top of Section Depth(m): 519.40
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (140-145), 1B (144-150);
Texture : APHYRIC,DISTINCT GLASSY CHILL AGAINST SANDSTONE;
Structure : 1MM CALCITE VEIN & 5MM CALCITE VUG;
Vesicles : 5MM CALCITE VUG;
Replacement: CALCITE
Leg : 64 Top/Bottom Interval(mm): 0/1170 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 520.67
Core: 39 Top of Core Depth (m) : 515.00
Sect: 4 Top of Section Depth(m): 519.50
LITHOLOGY: DOLERITE;
Piece No. : PCES 1 (1-3), 2 (3-10), 3 (11-17), 4 (18-23),
5 (23-35), 6 (36-46), 7 (47-60), 8 (62-75),
9 (76-78), 10 (80-84), 11A (85-93), 11B (89-98),
12 (99-117);
Texture : FINE-TO-MEDIUM-GRAINED,EQUIGRANULAR;
Structure : 1-2MM WIDE CALC.CARB VEINS IN PCES 2-3;
Alteration : MOD
PCES 1-3;
FRESH
PCES 4-12;
Comments : PCE 12 MARKS END OF CORE;
Replacement: CARBONATE
CALC.CARB FILLS VEINS;
Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 526.00
Core: 40 Top of Core Depth (m) : 524.50
Sect: 1 Top of Section Depth(m): 524.50
LITHOLOGY: DOLERITE;
Piece No. : PCES 1A (0-20), 1B (19-38), 1C (37-51), 2A (53-65),
2B (65-79), 2C (80-87), 2D (86-91), 3 (90-93),
4A (94-121), 4B (119-130), 4C (129-138),
4D (138-142), 4E (140-150);
Texture : DOMINANTLY EQUIGRANULAR DOLERITE,MORE PLAG XTLS
(TO 1MM) IN LOWER PORTION OF SECTION (140-150MM);
Structure : NON-VESICULAR,SEVERELY VEINED BY CALCITE IN INTERVAL
120-150CM,MINOR CALCITE VEINS RUN THROUGHOUT;
Alteration : MOD
INTERVALS 15-20+20-45+53-56+75-95CM;
FRESH
INTERVALS 0-15+20-45+50-53+56-75+95-120CM;
EXTENSIVELY
PCES 4B-4E;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE
Size(mm): TO 1
MORE PHENOS OCCUR IN LOWER PART OF SECTION
(140-150CM);
Replacement: CALCITE
Leg : 64 Top/Bottom Interval(mm): 0/1190 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 527.19
Core: 40 Top of Core Depth (m) : 524.50
Sect: 2 Top of Section Depth(m): 526.00
LITHOLOGY: DOLERITE;
Piece No. : PCES 1 (0-3), 2 (4-7), 3A (7-13), 3B (13-20),
3C (21-30), 3D (30-37), 3E (37-41), 3F (41-48),
3G (44-47), 3H (48-56), 3I (55-60), 3J (61-80),
3K (80-90), 3L (90-98), 4 (10-110), 5A (111-119);
Texture : MAINLY EQUIGRANULAR,MEDIUM-GRAINED,CHILLED(?) (NOT
GLASSY) MARGIN PCE 5B;
Structure : INTENSE VEINING(MAINLY CALC.CARB) WITH 1-5MM WIDE
VEINS,PCE 5B SANDSTONE(120-127CM);
Alteration : MOD
ALTERED OL PHENOS IN RANDOM CONCENTRATIONS IN
INTERVALS 16-98+104-107+113-116CM;
Comments : DARK GRAY COLOR;
Phenocrysts: OLIVINE
Size(mm): TO 2
ALTERED OL PHENOS IN RANDOM CONCENTRATIONS
THROUGHOUT INTERVALS 16-98+104-107+113-116CM;
Replacement: CARBONATE
CALC.CARB VEINS;
Leg : 64 Top/Bottom Interval(mm): 1200/1270 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 527.27
Core: 40 Top of Core Depth (m) : 524.50
Sect: 2 Top of Section Depth(m): 527.20
LITHOLOGY: SEDIMENT (SANDSTONE);
Piece No. : PCE 5B (120-127);
Comments : COUNTRY ROCK SANDSTONE SIMILAR TO THAT AT
UPPER CONTACT EXCEPT THAT SANDSTONE IS BAKED
AT LOWER CONTACT AT ABOUT 121CM;
Leg : 64 Top/Bottom Interval(mm): 1270/1500 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 527.50
Core: 40 Top of Core Depth (m) : 524.50
Sect: 2 Top of Section Depth(m): 527.27
LITHOLOGY: SEDIMENT;
Leg : 64 Top/Bottom Interval(mm): 0/1280 Analyst: Fornari, D.
Hole: 474A Sample Midpoint (m) : 541.28
Core: 41 Top of Core Depth (m) : 534.00
Sect: 5 Top of Section Depth(m): 540.00
LITHOLOGY: SEDIMENT;
Leg : 64 Top/Bottom Interval(mm): 1280/1500 Analyst: Fornari, D.
Hole: 474A Sample Midpoint (m) : 541.50
Core: 41 Top of Core Depth (m) : 534.00
Sect: 5 Top of Section Depth(m): 541.28
LITHOLOGY: DOLERITE;
Piece No. : PCES 1A (128-132), 1B (129-132), 1C (132-138),
2 (136-140), 3 (140-144), 4 (144-150);
Texture : BAKED CONTACT BETWEEN OVERLYING SEDIMENT & DOLERITE
AT 128-129CM,SILL CONTACT IS CHILLED(TO 2MM) &
GRAINSIZE DECREASES FROM CONTACT WHERE IT IS OL
PHYRIC(1MM GRAINS) TO MORE FINE-GRAINED AT ABOUT
145CM,145-150CM DOLERITE IS EQUIGRANULAR TO APHYRIC;
Structure : LARGE(8MM) CALCITE VEIN OCCURS BETWEEN 131-132CM;
Alteration : MOD
INTERVAL 128-133CM;
FRESH
INTERVAL 133-150CM;
Replacement: CALCITE
Leg : 64 Top/Bottom Interval(mm): 0/ 420 Analyst: Fornari, D.
Hole: 474A Sample Midpoint (m) : 541.92
Core: 41 Top of Core Depth (m) : 534.00
Sect: 6 Top of Section Depth(m): 541.50
LITHOLOGY: DOLERITE;
Piece No. : PCES 1 (0-4), 2 (7-13), 3 (16-24), 4A (26-30),
4B (26-31), 5 (35-42);
Texture : EQUIGRANULAR SHOWING SOME TENDENCY TOWARDS ALTERED
OL-PHYRIC CLOSE TO VEINS;
Structure : LARGE 1.2CM THICK CALCITE VEIN CUTS ACROSS PCE 1;
Replacement: CALCITE
Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 545.00
Core: 42 Top of Core Depth (m) : 543.50
Sect: 1 Top of Section Depth(m): 543.50
LITHOLOGY: DOLERITE;
Piece No. : PCES 1A (0-14), 1B (13-20), 1C (20-26), 1D (26-33),
1E (33-39), 1F (39-46), 1G (44-49), 1H (49-53),
1I (49-52), 1J (53-55), 1K (53-60), 2A (61-69),
2B (67-71), 2C (71-75), 2D (75-87), 2E (76-85),
3A (88-91), 3B (88-91), 4A (92-99), 4B (92-99),
5A (100-105), 5B (100-104), 6A (105-111),
6B (105-110), 7 (112-118), 8A (120-126),
8B (126-133), 9 (135-138), 10A (139-145),
10B (141-147);
Texture : FINE-GRAINED EQUIGRANULAR FOR MOST OF SECTION;
Structure : CALCITE-EPID(?) VEINS,VEINS SUB-VERTICAL WITH
MAXIMUM WIDTH OF 1CM,VEINING OCCURS IN INTERVALS
31-110+139-146CM;
Alteration : FRESH
INTERVALS 0-30+113-140CM;
MOD
Phenocrysts: OLIVINE
DARK GREEN PHENOS OCCURRING IN RANDOM ORIENTATION
FROM 40-118CM IN VICINITY OF CALCITE-EPID(?)
VEINS;
Replacement: CALCITE
EPIDOTE
ID EPID IN VEINS UNCERTAIN;
Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 546.50
Core: 42 Top of Core Depth (m) : 543.50
Sect: 2 Top of Section Depth(m): 545.00
LITHOLOGY: DOLERITE;
Piece No. : PCES 1 (0-4), 2A (6-11), 2B (6-13), 3A (14-20),
3B (20-23), 4A (26-29), 4B (30-35), 4C (30-35),
4D (36-42), 5 (44-51), 6 (52-58), 7A (60-64),
7B (60-65), 8A (65-71), 8B (66-67), 8C (66-74),
9A (76-83), 9B (75-83), 9C (83-94), 9D (95-101),
9E (101-104), 9F (106-112), 9G (113-119),
9H (119-126), 9I (123-126), 9J (126-134),
9K (134-145), 10 (146-148);
Texture : FINE-GRAINED EQUIGRANULAR;
Structure : CALCITE VEINS CUT IN VERTICAL TRENDS,92-134CM
VARIOLITIC CAVITIES FILLED WITH RADIAL FIBROUS
ZEOL(?) MATERIAL;
Alteration : MOD
ALTERED OL PHENOS AT 21-23+73-82CM;
Comments : DARK GRAY COLOR;
Phenocrysts: OLIVINE
ALTERED AT 21-23+73-82CM;
Replacement: CALCITE
ZEOLITE
ID ZEOL UNCERTAIN;
QUARTZ
ID QTZ UNCERTAIN IN PCE 1;
Leg : 64 Top/Bottom Interval(mm): 0/1400 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 547.90
Core: 42 Top of Core Depth (m) : 543.50
Sect: 3 Top of Section Depth(m): 546.50
LITHOLOGY: DOLERITE;
Piece No. : PCES 1A (0-3), 1B (0-3), 2 (5-14), 3 (15-19),
4A (20-26), 4B (26-33), 5A (35-40), 5B (40-49),
5C (50-68), 5D (58-73), 5E (71-73), 5F (74-90),
5G (91-97), 6A (99-104), 6B (100-104), 7 (105-115),
8A (116-120), 8B (116-122), 8C (118-123),
8D (122-124), 8E (121-124), 9A (126-135),
9B (135-140);
Texture : FINE-GRAINED,EQUIGRANULAR,HOMOGENEOUS;
Structure : ALMOST NO CALCITE VEINING;
Alteration : MOD
Comments : DARK GRAY COLOR;
Vesicles :
Location: Filling: CALCITE,ZEOL
35-75CM SOME VESICLES FILLED & ID ZEOL UNCERTAIN;
Replacement: CALCITE
ZEOLITE
ID ZEOL UNCERTAIN;
Leg : 64 Top/Bottom Interval(mm): 0/1450 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 549.45
Core: 42 Top of Core Depth (m) : 543.50
Sect: 4 Top of Section Depth(m): 548.00
LITHOLOGY: DOLERITE;
Piece No. : PCES 1A (2-7), 1B (0-7), 1C (7-12), 1D (7-13),
1E (12-21), 1F (21-49), 1G (49-75), 1H (73-76),
1I (75-93), 1J (91-99), 1K (95-99), 1L (99-115),
2A (116-125), 2B (125), 2C (125-131), 2D (128-131),
2E (131-141);
Texture : FINE-GRAINED EQUIGRANULAR,APHYRIC,VERY MASSIVE &
HOMOGENEOUS;
Structure : FEW CALCITE VEINS;
Alteration : FRESH
Comments : DARK GRAY COLOR;
Vesicles : NO VUGS VISIBLE;
Replacement: CALCITE
Leg : 64 Top/Bottom Interval(mm): 0/1000 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 550.50
Core: 42 Top of Core Depth (m) : 543.50
Sect: 5 Top of Section Depth(m): 549.50
LITHOLOGY: DOLERITE;
Piece No. : PCES 1A (0-12), 1B (4-12), 1C (12-14), 2 (15-27),
3A (30-31), 3B (30-37), 3C (32-41), 4A (43-46),
4B (44-47), 4C (46-48), 5 (50-54), 6A (56-57),
6B (56-59), 7 (61-67), 8 (70-74), 9A (76-78),
9B (78-81), 10A (83-87), 10B (88-90), 10C (87-90),
11 (92-100);
Texture : FINE-GRAINED EQUIGRANULAR,HOMOGENOUS;
Structure : MASSIVE,SOME CALCITE VEINING TO 1MM THICK;
Alteration : MOD
PCES 1A-1C;
FRESH
PCES 2-11;
Comments : DARK GRAY COLOR;
Replacement: CALCITE
Leg : 64 Top/Bottom Interval(mm): 0/ 300 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 553.30
Core: 43 Top of Core Depth (m) : 553.00
Sect: 1 Top of Section Depth(m): 553.00
LITHOLOGY: CLAYSTONE;
Leg : 64 Top/Bottom Interval(mm): 300/1500 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 554.50
Core: 43 Top of Core Depth (m) : 553.00
Sect: 1 Top of Section Depth(m): 553.30
LITHOLOGY: DOLERITE;
Piece No. : PCES 1 (4-8), 2A (10-14), 2B (14-23), 2C (18-26),
2D (23-28), 2E (29-40), 2F (39-43), 2G (43-45),
2H (43-50), 3 (51-60), 4A (62-71), 4B (69-75),
4C (75-80), 4D (80-88), 4E (88-93), 4F (88-93),
4G (93-100), 4H (98-105), 4I (105-113),
4J (111-121), 4K (120-129), 4L (129-138),
5A (140-148), 5B (142-149);
Texture : SIMILAR TEXTURE & COMPOSITION TO CORE 42-1,
ESSENTIALY EQUIGRANULAR;
Structure : CALCITE VEINING HAS CAUSED CONSIDERABLE BREAKUP OF
DOLERITE IN 93-97CM,FRACTURING OF DOLERITE COMMON
RESULTING IN MANY SMALL FRAGMENTS IN 24-29+64-70+
81-87CM,SLICKENSLIDES SEEN IN FRACTURES AROUND
10-28CM;
Alteration : MOD
PCES 1-2D+4A+4D-4G+4K;
FRESH
PCES 2E-3+4B-4C+4H-4J+4L-5B;
Comments : GRAY COLOR;
Vesicles : Size(mm): <1 Percent: RARE
Location: Filling: CALCITE
INTERVAL 105-150CM;
Phenocrysts: OLIVINE ( 10%)
Size(mm): <1
GREEN ALTERED PHENOS(?),ID PHENOS INTERVALS
32-78+105-150CM;
Replacement: CALCITE
Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 556.00
Core: 43 Top of Core Depth (m) : 553.00
Sect: 2 Top of Section Depth(m): 554.50
LITHOLOGY: DOLERITE;
Piece No. : PCES 1A (1-11), 1B (11-25), 1C (20-23), 1D (24-31),
1E (24-28), 1F (25-34), 1G (34-39), 1H (34-39),
1I (38-40), 1J (41-49), 1K (39-57), 1L (50-57),
2 (59-61), 3A (63-75), 3B (75-85), 4A (86-88),
4B (86-91), 4C (89-95), 4D (95-98), 4E (97-100),
5A (101-114), 5B (112-125), 6 (127-132),
7A (133-142), 7B (143-149);
Texture : EQUIGRANULAR;
Structure : GREEN XTLS NOTED IN PREVIOUS SECTIONS ARE MORE
ROUNDED & MAY BE OL-REPLACED-BY-CLAY PSEUDOMORPHS,
PCES 1B-1C AT 12-25CM & PCES 1J-1L AT 40-55CM HAVE
1-3MM WIDE VEIN SUB-PARALLEL TO CORE LINER,VEIN IS
COMPRISED OF DARK CRYPTOXTLLINE MATERIAL POSSIBLY
ALTERED GLASS(CLAY.MINS?) & WITH ACCESSORY PYR;
Alteration : MOD
INTERVAL 30-40CM;
FRESH
Comments : DARK GRAY COLOR;
Vesicles : Size(mm): 1 Percent:
Location: Filling: CALCITE,SMEC
OCCASIONAL OCCURRENCE;
Phenocrysts: OLIVINE
OL ALTERED TO CLAY,ROUNDED;
Replacement: CALCITE
SMECTITE
CLAY
Size(mm): 1
Minerals Replaced: OL
Leg : 64 Top/Bottom Interval(mm): 0/1450 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 557.45
Core: 43 Top of Core Depth (m) : 553.00
Sect: 3 Top of Section Depth(m): 556.00
LITHOLOGY: DOLERITE;
Piece No. : PCES 1 (3-7), 2 (10-25), 3A (26-29), 3B (27-29),
4A (31-39), 4B (31-39), 5A (40-42), 5B (42-56),
5C (56-64), 6 (65-72), 7A (73-76), 7B (76-87),
8 (89-99), 9 (102-108) 10A (109-111), 10B (109-122),
10C (114-121), 10D (122-127), 10E (127-133),
10F (128-133), 10G (133-139), 10H (139-145);
Texture : EQUIGRANULAR,MEDIUM-GRAINED;
Structure : RARE CALCITE VEINS IN PCES 2+4+8,COMPOSITE VEINS IN
PCES 10A-10D ARE COMPRISED OF CALCITE & DARK UNIDENT
MATERIAL(SIMILAR TO CORE 43-2 INTERVALS 12-25+
40-55CM) WITH PYR;
Alteration : FRESH
MOD
PCES 4A-5A+9+10H;
Comments : DARK GRAY COLOR;
Phenocrysts: OLIVINE
SPORADIC PHENOS OF ALTERED OL;
Replacement: CALCITE
UNIDENTIFIED
DARK MATERIAL IN VEINS OF PCES 10A-10D;
Leg : 64 Top/Bottom Interval(mm): 0/ 650 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 558.15
Core: 43 Top of Core Depth (m) : 553.00
Sect: 4 Top of Section Depth(m): 557.50
LITHOLOGY: DOLERITE;
Piece No. : PCES 1A (1-14), 1B (6-17), 1C (15-21), 1D (15-24),
2A (26-32), 2B (31-39), 2C (34-39), 3A (40-44),
3B (40-45), 3C (42-50), 4A (52-60), 4B (55-63),
4C (60-63);
Texture : MEDIUM-GRAINED EQUIGRANULAR;
Alteration : FRESH
Comments : DARK GRAY COLOR WITH OCCASIONAL GREEN CLAY
PATCHES(?) AFTER OL;
Phenocrysts: OLIVINE
TABLOID XTLS CLEARLY VISIBLE;
Replacement: CLAY
GREEN CLAY PATCHES AFTER OL;
Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 564.00
Core: 44 Top of Core Depth (m) : 562.50
Sect: 1 Top of Section Depth(m): 562.50
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCES 1A (1-10), 1B (10-14), 2 (15-23), 3 (24-28),
4 (29-32), 5 (32-38), 6 (39-44), 7A (45-50),
7B (47-52), 7C (50-55), 8A (56-61), 8B (60-69),
9A (70-74), 9B (72-75), 9C (73-76), 10A (77-83),
10B (82-91), 10C (89-93), 11A (94-99), 11B (94-99),
12A (100-110), 12B (109-114), 12C (114-117),
12D (114-117), 12E (116-117), 12F (118-123),
12G (118-123), 12H (124-129), 12I (124-126),
12J (126-131), 12K (129-141), 13 (143-148);
Texture : 0-43CM APHANITIC BASALT IN BRECCIATED MIXTURE OF
COARSE BASALT & BAKED BROWN SEDIMENT,SECTION GRADES
DOWNWARD INTO FRESHER FINE-GRAINED BASALT;
Structure : FRACTURED,CALCITE VEINS(1MM WIDE);
Alteration : EXTENSIVELY
0-43CM,43-60CM INTERMEDIATE BETWEEN EXTENSIVELY &
MOD;
MOD
60-150CM;
Comments : MEDIUM-GRAY COLOR 0-43CM,43-150CM GRAY COLOR;
Phenocrysts: PLAGIOCLASE ( 2%)
Size(mm): TO 2
OCCASIONAL & AS PLAG-OL GLOMEROCRYSTS TO 2MM IN
COARSE BASALT;
OLIVINE
GLOMEROCRYSTS OF PLAG-OL TO 2MM IN COARSE BASALT;
Replacement: CALCITE
Leg : 64 Top/Bottom Interval(mm): 0/ 110 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 564.11
Core: 44 Top of Core Depth (m) : 562.50
Sect: 2 Top of Section Depth(m): 564.00
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
Piece No. : PCE 1A & 1B (0-11);
Comments : CONTINUATION OF BASALT IN CORE 44-1, DARK GREEN
COLOR;
Texture : APHANITIC, SPARSELY PHYRIC, BAKED MUDSTONE SELVAGE;
Structure : VEINS FILLED WITH GREEN CLAY;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE
OCCASIONAL MICROPHENOS;
OLIVINE
ID UNCERTAIN;
Replacement: CLAY
Leg : 64 Top/Bottom Interval(mm): 110/1160 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 565.16
Core: 44 Top of Core Depth (m) : 562.50
Sect: 2 Top of Section Depth(m): 564.11
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 2 (12-15), 3 (16-20), 4 (22-24), 5 (25-31),
6 (32-42), 7A (43-46), 7B (45-50), 8A (52-59),
8B (59-62), 8C (61-67), 9 (69-73), 10 (75-79),
11 (81-85), 12 (86-89), 13 (90-92), 14A (92-101),
14B (101-107), 14C (107-118), 14D (115-118);
Texture : APHANITIC, MODERATELY PHYRIC, GLASSY SELVAGE ON PCE
6, BAKED MUDSTONE SELVAGE ON PCE 7A;
Comments : COLOR LIGHT TO MEDIUM GRAY;
Alteration : FRESH
MOD
PCES 7 & 14;
Structure : SLICKENSIDES(?) ON PCE 14C & 14D, VEINS FILLED WITH
GREEN CLAY ON PCES 7 & 14;
Phenocrysts: PLAGIOCLASE ( TO 5%)
XENOCRYSTS TO 5MM IN DIAMETER, ALSO OCCASIONAL
PLAG MICROPHENOS;
OLIVINE
Replacement: CLAY
Leg : 64 Top/Bottom Interval(mm): 1160/1400 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 565.40
Core: 44 Top of Core Depth (m) : 562.50
Sect: 2 Top of Section Depth(m): 565.16
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCES 15 (119-121), 16 (122-125), 17 (126-135),
18 (135-138);
Comments : DARK GREY COLOR;
Texture : FINE-GRAINED,MODERATELY PHYRIC, GLASSY SELVAGE AT
119CM;
Structure : SLICKENSIDES(?) PCES 15-17;
Alteration : MOD
PCES 15-17;
FRESH
CE 18;
Vesicles : Size(mm): <<1 Percent: 20
Location: Filling: CLAY
GREEN CLAY;
Phenocrysts: PLAGIOCLASE
XENOCRYSTS STILL PRESENT;
OLIVINE
Leg : 64 Top/Bottom Interval(mm): 0/1300 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 566.80
Core: 44 Top of Core Depth (m) : 562.50
Sect: 3 Top of Section Depth(m): 565.50
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1A (1-7), 1B (6-13), 2 (15-18), 3 (20-24),
4 (25-28), 5A (30-35), 5B (34-41), 5C (41-48),
5D (48-52), 5E (52-59), 5F (58-64), 5G (64-70),
5H (69-73), 6A (74-79), 6B (74-82), 7 (84-86),
8 (88-90), 9 (91-98), 10A (99-110), 10B (108-114),
10C (114-117), 10D (113-118), 10E (118-123),
10F (119-125), 11A (126-130), 11B (127-130);
Texture : 0-98CM FINE-GRAINED,29-98CM APHANITIC,99-132CM FINE-
TO-MEDIUM-GRAINED;
Structure : PCES 5E-9 AMYGDULE FREE;
Alteration : SLIGHTLY
PCES 1A-5A+10A-11B;
FRESH
PCES 5B-9;
Comments : 0-28+99-130CM DARK GRAY COLOR,29-98CM GRAY COLOR,
BAKED MUDSTONE SELVAGE IN PCE 3;
Vesicles : Size(mm): Percent: 20
Location: Filling: CLAY.MIN,CALCITE
PCES 1A-4;
Location: Filling: CHLOR
GREEN CLAY.MIN POSSIBLY CHLOR;
Phenocrysts: PLAGIOCLASE ( 10%)
OLIVINE
Size(mm): TO 6
ID OL UNCERTAIN,PCES 10A-11B;
Replacement: CALCITE
CLAY MINERALS
GREEN CLAY.MIN POSSIBLY CHLOR;
Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Fornari, D.
Hole: 474A Sample Midpoint (m) : 568.50
Core: 44 Top of Core Depth (m) : 562.50
Sect: 4 Top of Section Depth(m): 567.00
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1A (0-5), 1B (5-14), 1C (14-18), 1D (13-27),
1E (27-30), 2A (32-36), 2B (37-40), 3A (42-44),
3B (42-44), 3C (45-47), 4 (48-55), 5 (57-63),
6A (65-68), 6B (66-68), 7 (70-78), 8 (80-86),
9A (87-90), 9B (90-91), 9C (90-91), 9D (90-91),
10 (93-103), 11A (105-109), 11B (107-109),
12 (111-130), 13 (132-136), 14A (138-145),
14B (140-146);
Texture : PHYRIC,EQUIGRANULAR,UNIFORM TEXTURE THROUGHOUT;
Structure : SLIGHTLY FRACTURED WTIH SMALL CALCITE VEINS;
Alteration : MOD
10-17CM,SMALL ALTERATION ZONE AT 15CM;
Comments : MEDIUM GRAY BASALT,BAKED SEDIMENT CONTACT AT PCE 14A
ON TOP & SIDE WITH CONCHOIDAL FRACTURES & GREASY TO
THE TOUCH;
Vesicles : Size(mm): TO 2 Percent:
Location: Filling: CLAY.MIN
0-4CM VESICLES FILLED WITH GREEN CLAY.MIN,PCES 1A-
1B+2B+4;
Size(mm): <1 Percent:
Location: Filling: CALCITE
FEW SMALL VESICLES;
Phenocrysts: PLAGIOCLASE
Size(mm): 1-2
PCES 1A-1B+1D-2B+4-5+7-8+10-12+14A;
PLAGIOCLASE
Size(mm): TO 4
14-15CM;
Replacement: CALCITE
CLAY MINERALS
Leg : 64 Top/Bottom Interval(mm): 0/1250 Analyst: Fornari, D.
Hole: 474A Sample Midpoint (m) : 569.75
Core: 44 Top of Core Depth (m) : 562.50
Sect: 5 Top of Section Depth(m): 568.50
LITHOLOGY: BASALT;
Piece No. : PCES 1 (1-6), 2 (8-12), 3A (13-19), 3B (15-20),
4 (22-27), 5 (28-30), 6A (32-36), 6B (34-41),
7A (42-50), 7B (50-55), 8 (57-64), 9 (65-69),
10A (71-72), 10B (71-72), 10C (73-75), 11 (76-83),
12 (85-94), 13 (95-100), 14A (102-110),
14B (105-110), 14C (111-114), 14D (110-122);
Texture : APHANITIC TO SLIGHTLY COARSER-GRAINED,EQUIGRANULAR-
FINE AT 0-70CM BECOMING COARSER-GRAINED 70-125CM;
Structure : CALCITE VEINS,LARGE CALCITE VEINS IN PCES 11+14A-
14D;
Alteration : FRESH
MOD
PCES 10A-10C,SLIGHT ALTERATION NEAR VEINS;
Comments : BASALT MEDIUM GRAY COLOR;
Phenocrysts: PLAGIOCLASE
PCES 9+11-12+14D;
Replacement: CALCITE
Leg : 64 Top/Bottom Interval(mm): 5/1450 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 573.45
Core: 45 Top of Core Depth (m) : 572.00
Sect: 1 Top of Section Depth(m): 572.01
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1 (5-40), 2A (41-55), 2B (54-55), 2C (55-71),
2D (60-90), 2E (88-109), 2F (110-118), 2G (118-123),
2H (122-128), 2I (117-135), 2J (128-132),
2K (133-138), 3 (140-141);
Texture : EQUIGRANULAR,FINE-GRAINED;
Structure : PCES 1+2C-2D+2G-2K CALCITE-GREEN CLAY(?) VEINING(TO
5MM THICK);
Alteration : FRESH
EXCEPT FOR VEINING;
SLIGHTLY
10-22+55-73+107-140CM;
Comments : DARK GRAY COLOR;
Vesicles : NO CALCITE-CHLORITE VESICLES PRESENT;
Phenocrysts: PLAGIOCLASE
GLOMEROCRYSTS IN 75-120CM INTERVAL;
Replacement: CALCITE
CLAY MINERALS
ID GREEN CLAY.MIN UNCERTAIN POSSIBLY EPID;
Leg : 64 Top/Bottom Interval(mm): 0/ 30 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 572.03
Core: 45 Top of Core Depth (m) : 572.00
Sect: 1 Top of Section Depth(m): 572.00
LITHOLOGY: SEDIMENT (CLAYSTONE);
Piece No. : PCE NO PCE NUMBER ASSIGNED;
Comments : 0-3CM,FINE-GRAINED,OLIVE-GRAY(NN14);
Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 575.00
Core: 45 Top of Core Depth (m) : 572.00
Sect: 2 Top of Section Depth(m): 573.50
LITHOLOGY: PLAG GLOMEROPHYRIC BASALT;
Piece No. : PCES 1 (0-30), 2A (32-45), 2B (45-64), 2C (62-65),
3 (67-85), 4A (87-112), 4B (111-112), 4C (112-125),
5 (131-150);
Texture : MEDIUM-TO-FINE-GRAINED BECOMING COARSER TOWARD THE
BASE OF SECTION,100-140CM EQUIGRANULAR,GLOMEROPHYRIC
Structure : CALCITE-GREEN CLAY(?) VEINS(TO 2MM WIDE) IN PCES
1+2B-2C+4A-4B;
Alteration : FRESH
ALTERATION ONLY IN VEINS;
Phenocrysts: PLAGIOCLASE
GLOMEROCRYSTS THROUGHOUT,MICROPHENOS 100-140CM
INTERVAL;
Replacement: CALCITE
CLAY MINERALS
ID GREEN CLAY.MIN UNCERTAIN POSSIBLY EPID;
Leg : 64 Top/Bottom Interval(mm): 0/1450 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 576.45
Core: 45 Top of Core Depth (m) : 572.00
Sect: 3 Top of Section Depth(m): 575.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (0-10), 1B (10-20), 1C (20-36), 1D (34-48),
1E (48-51), 1F (50-73), 2A (75-90), 2B (90-106),
2C (107-124), 3 (126-144);
Texture : MEDIUM-TO-FINE-GRAINED,APHYRIC;
Structure : CRACKS IN PCES 1C+1D,PCE 3 HAS GREEN CLAY-CHLOR(?)
VEIN;
Alteration : FRESH
ALTERATION RESTRICTED TO SOME CRACKS IN PCES
1C+1D;
Comments : DARK GRAY BASALT;
Groundmass : PLAGIOCLASE
Size(mm): TO 3
LATHS,SOME GLOMEROCRYSTS THROUGHOUT;
Replacement: CLAY MINERALS
ID GREEN CLAY.MIN UNCERTAIN POSSIBLY CHLOR;
Leg : 64 Top/Bottom Interval(mm): 0/1400 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 577.90
Core: 45 Top of Core Depth (m) : 572.00
Sect: 4 Top of Section Depth(m): 576.50
LITHOLOGY: PLAG PHYRIC DOLERITE;
Piece No. : PCES 1A (0-18), 1B (18-31), 1C (30-35), 1D (35-38)
1E (39-42), 2 (45-47), 3A (48-60), 3B (60-73),
3C (73-80), 3D (80-90), 3E (90-100), 4 (103-108),
5 (109-113), 6 (114-118), 7 (119-128), 8 (129-137);
Texture : MEDIUM-TO-FINE-GRAINED,PHYRIC;
Structure : CALCITE-GREEN CLAY(?) VEINS RESTRICTED TO 30-40+
120-138CM;
Alteration : FRESH
NO ALTERATION EXCEPT FOR VEINS;
Comments : DARK GRAY BASALT;
Vesicles : Size(mm): Percent: 0
Groundmass : PLAGIOCLASE
Size(mm): TO 3
LATHS,GLOMEROCRYSTS PRESENT THROUGHOUT;
Replacement: CALCITE
CLAY MINERALS
ID GREEN CLAY.MIN UNCERTAIN POSSIBLY CHLOR;
Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 579.50
Core: 45 Top of Core Depth (m) : 572.00
Sect: 5 Top of Section Depth(m): 578.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1 (1-7), 2 (9-15), 3 (17-20), 4 (22-28),
5 (30-35), 6A (37-51), 6B (50-59), 6C (59-60)
7 (62-64), 8A (67-71), 8B (70-71), 9 (72-89),
10A (90-106), 10B (106-126), 10C (127-150);
Texture : SIMILAR TO CORE 45-4,MEDIUM-TO-FINE-GRAINED,PHYRIC;
Structure : FEW CALCITE VEINS IN PCES 6A-6B;
Alteration : FRESH
ALTERATION ONLY ALONG VEINS IN PCES 6A-6B;
Comments : DARK-GRAY BASALT;
Vesicles : NO VUGS PRESENT;
Groundmass : PLAGIOCLASE
Size(mm): TO 4
LATHS;
Replacement: CALCITE
Leg : 64 Top/Bottom Interval(mm): 0/ 650 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 580.15
Core: 45 Top of Core Depth (m) : 572.00
Sect: 6 Top of Section Depth(m): 579.50
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1 (1-7), 2 (7-42), 3 (42-63);
Texture : SIMILAR TO CORE 45-5,MEDIUM-TO-FINE-GRAINED,PHYRIC,
HOMOGENEOUS;
Structure : SMALL GREEN CLAY(?)-CALCITE VEIN IN PCE 2(12CM);
Alteration : FRESH
Comments : DARK GRAY BASALT;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 3
PHENOS WITH GLOMEROCRYSTS LESS ABUNDANT THAN IN
PREVIOUS SECTIONS;
Replacement: CALCITE
CLAY MINERALS
ID GREEN CLAY.MIN UNCERTAIN POSSIBLY CHLOR;
Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 582.50
Core: 46 Top of Core Depth (m) : 581.00
Sect: 1 Top of Section Depth(m): 581.00
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1A (3-6), 1B (3-6), 2A (8-49), 2B (50-85),
2C (85-97), 2D (97-100), 2E (99-107), 2F (107-117),
2G (117-120), 2H (119-131), 2I (132-150);
Texture : APHANITIC,HOMOGENEOUS,ESSENTIALLY CONTINUATION OF
CORE 45-6 BECOMING FINER-GRAINED TOWARD CORE BASE;
Structure : VERY MASSIVE,NO VEINS;
Alteration : FRESH
NO VISIBLE ALTERATION;
Comments : DARK GRAY;
Vesicles : Size(mm): Percent: 0
Groundmass : PLAGIOCLASE
Size(mm): TO 3
LATHS;
Leg : 64 Top/Bottom Interval(mm): 0/1350 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 583.85
Core: 46 Top of Core Depth (m) : 581.00
Sect: 2 Top of Section Depth(m): 582.50
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCES 1 (0-12), 2A (16-17), 2B (15-17), 3 (20-25),
4 (26-34), 5A (36-38), 5B (36-41), 6 (43-46),
7 (47-52), 8A (54-65), 8B (65-75), 8C (73-75),
8D (73-79), 9 (80-84), 10A (86-93), 10B (94-104),
10C (104-110), 11A (113-120), 11B (118-135);
Texture : 0-19CM FINE-GRAINED,PCE 1 CONTINUATION OF CORE 46-1,
PCE 11A SHOWS GLASS IN UPPER PART;
Structure : TWO CALCITE-FILLED VEINS AT BOTTOM OF PCE 1,SOME
CALCITE VEINS IN PCES 3-10C;
Alteration : FRESH
MINOR ALTERATION PCES 11A-11B;
Comments : DARK GRAY BASALT,PCES 1-2B SEEM TO BE BASE OF
COOLING UNIT,CONTACT NOT RECOVERED 20-110CM,
113-134CM POSSIBLY ANOTHER UNIT;
Phenocrysts: PLAGIOCLASE ( RARE%)
Size(mm): TO 2
0-19CM;
PLAGIOCLASE
Size(mm): TO 10
MEGACRYSTS PCES 3-10C;
CLINOPYROXENE
PCES 11A+11B PLAG-CPX MEGACRYSTS;
Replacement: CALCITE
Leg : 64 Top/Bottom Interval(mm): 0/ 900 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 584.90
Core: 46 Top of Core Depth (m) : 581.00
Sect: 3 Top of Section Depth(m): 584.00
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1 (0-6), 2A (8-12), 2B (7-14), 3 (16-20),
4 (23-28), 5A (30-33), 5B (34-37), 6 (40-47),
7 (49-55), 8 (56-63), 9 (64-70), 10 (73-76),
11 (77-87);
Texture : PHYRIC;
Structure : GREEN CLAY(?)-CALCITE VEINS;
Alteration : FRESH
MOD
PCES 1-2B;
Comments : DARK GRAY;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 10
LARGE MEGACRYSTS;
OLIVINE
Size(mm): 1
ID ALTERED OL UNCERTAIN;
CLINOPYROXENE
Size(mm): 1
Replacement: CALCITE
CLAY MINERALS
ID GREEN CLAY.MIN UNCERTAIN POSSIBLY EPID;
Leg : 64 Top/Bottom Interval(mm): 0/1450 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 591.45
Core: 47 Top of Core Depth (m) : 590.00
Sect: 1 Top of Section Depth(m): 590.00
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1 (0-7), 2 (8-10), 3 (12-18), 4 (20-25),
5 (27-31), 6 (33-37), 7A (39-45), 7B (42-50),
8 (52-64), 9 (66-70), 10 (72-75), 11 (76-79),
12 (80-85), 13 (86-92), 14 (92-97), 15 (99-103),
16 (104-112), 17A (113-124), 17B (118-123),
17C (123-125), 18 (127-135), 19 (136-141);
Texture : FINE-GRAINED TO APHANITIC,PCE 4 GLASS SELVAGE;
Structure : PCES 6-8+15-17 CALCITE-GREEN CLAY VEINS,SMALL GREEN
CLAY-FILLED AMYGDULES(<<0.5MM) IN GNDMASS;
Alteration : FRESH
SLIGHTLY
RESTRICTED TO MINOR CALCITE -GREEN CLAY VEINING
IN PCES 6-8+15-17;
Comments : DARK GRAY BASALT;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): TO 15
ANHEDRAL TO SUBHEDRAL MEGACRYSTS USUALLY 5MM;
Replacement: CALCITE
CLAY MINERALS
GREEN;
Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 593.00
Core: 47 Top of Core Depth (m) : 590.00
Sect: 2 Top of Section Depth(m): 591.50
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1A (0-5), 1B (5-10), 2 (12-19), 3A (20-25),
3B (20-30), 3C (25-30), 4A (30-35), 4B (31-40),
5A (42-48), 5B (48-55), 6 (57-64), 7A (65-73),
7B (75-83), 7C (84-90), 7D (91-101), 7E (101-111),
7F (110-115), 8A (120-122), 8B (123-125),
8C (125-127), 8D (127-131), 9A (133-144),
9B (144-149);
Texture : FINE-GRAINED TO APHANITIC,PHYRIC;
Structure : PCES 7A-7F CALCITE-CHLOR VEINING(1-2MM WIDE);
Alteration : SLIGHTLY
RESTRICTED TO BEINS IN PCES 7A-7F;
FRESH
ALL REMAINING PCES;
Comments : DARK GRAY;
Vesicles :
Location: Filling: CALCITE
SMALL VESICLES IN PCES 7E-7F;
Phenocrysts: PLAGIOCLASE
Size(mm): 5-10
ANHEDRAL TO SUBHEDRAL MEGACRYSTS;
Replacement: CALCITE
CHLORITE
Leg : 64 Top/Bottom Interval(mm): 0/1450 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 594.45
Core: 47 Top of Core Depth (m) : 590.00
Sect: 3 Top of Section Depth(m): 593.00
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1A (1-3), 1B (1-2), 1C (2-8), 2A (10-20),
2B (20-28), 2C (28-38), 3A (40-45), 3B (43-52),
4 (53-65), 5 (65-70), 6 (71-75), 7 (75-85),
8 (87-89), 9 (90-100), 10A (102-105), 10B (102-105),
11 (107-113), 12A (116-124), 12B (124-132),
13 (134-143);
Texture : FINE-GRAINED TO APHANITIC,GLASSY SELVAGES ALONG
EDGES OF PCES 12A+12B & AT BASE OF PCE 13;
Structure : PCES 1-2A+11-12 CALCITE VEINS;
Alteration : SLIGHTLY
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): 5-15
ANHEDRAL TO SUBHEDRAL MEGACRYSTS;
Replacement: CALCITE
Leg : 64 Top/Bottom Interval(mm): 0/1450 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 595.95
Core: 47 Top of Core Depth (m) : 590.00
Sect: 4 Top of Section Depth(m): 594.50
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1 (0-8), 2 (10-18), 3A (20-21), 3B (19-23),
3C (20-26), 3D (24-28), 4A (30-36), 4B (36-40),
5 (42-49), 6A (51-58), 6B (59-67), 6C (68-71),
6D (71-76), 6E (76-80), 6F (80-90), 6G (90-100),
6H (100-109), 7 (110-114), 8A (115-122),
8B (122-124), 9A (127-135), 9B (135-144);
Texture : FINE-GRAINED TO APHANITIC,PCES 1+5C-5D GLASSY
SELVAGES,PHYRIC;
Structure : CALCITE & CHLOR-FILLED VEINS(<1MM WIDE);
Alteration : SLIGHTLY
RESTRICTED TO VEINS;
Comments : GRAY BASALT;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): 5-15
ANHEDRAL TO SUBHEDRAL MEGACRYSTS;
Replacement: CALCITE
CHLORITE
Leg : 64 Top/Bottom Interval(mm): 0/ 600 Analyst: Saunders, A.
Hole: 474A Sample Midpoint (m) : 596.60
Core: 47 Top of Core Depth (m) : 590.00
Sect: 5 Top of Section Depth(m): 596.00
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1A (0-6), 1B (6-12), 1C (12-22), 2 (24-28),
3 (31-34), 4 (35-40), 5A (41-42), 5B (43-46),
5C (46-47), 6 (49-57);
Texture : FINE-GRAINED TO APHANITIC,PHYRIC;
Structure : CALCITE-CHLOR VEINS PCE 6;
Alteration : FRESH
VERY SLIGHT ALTERATION RESTRICTED TO VEINS OF PCE
6;
Comments : GRAY BASALT;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): 5-15
ANHEDRAL TO SUBHEDRAL MEGACRYSTS;
Replacement: CALCITE
CHLORITE
Leg : 64 Top/Bottom Interval(mm): 0/1450 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 600.45
Core: 48 Top of Core Depth (m) : 599.00
Sect: 1 Top of Section Depth(m): 599.00
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (1-12), 1B (12-20), 1C (19-28), 2 (31-37),
3 (39-42), 4 (43-48), 5 (51-54), 6 (56-58),
7A (60-68), 7B (67-75), 7C (75-83), 7D (83-90),
8 (83-85), 9 (97-106), 10 (108-117), 11 (120-124),
12 (125-130), 13 (131-135), 14 (137-143);
Texture : PHYRIC,APHANITIC,GLASS SELVAGES ON PCES 1A-1B+4-7A+
8-9+14;
Structure : PCES 1A-1B+10-11 CALCITE VEINS,MANY SMALL VEINLETS
ARE ZEOL & CLAYS,SMALL HAIRLINE FRACTURES(VERTICAL
TO SUBVERTICAL) OCCUR IN THE PILLOW SELVAGES &
EXTEND ABOUT 2-4CM INTO THE PILLOW(DOWN CORES);
Alteration : FRESH
GLASS SELVAGES VERY FRESH & SOME ONLY SLIGHTLY
PALAGONITIZED;
SLIGHTLY
RESTRICTED TO VEINS;
Comments : DARK GRAY BASALT;
Phenocrysts: PLAGIOCLASE (TO 15%)
Size(mm): TO 15
SUBHEDRAL MEGAPHENOS,LARGER MEGACRYSTS DO NOT
OCCUR NEAR TOP OF PILLOWS BUT ARE USUALLY FOUND
5-7CM DOWN CORE FROM SELVAGE;
Replacement: CALCITE
ZEOLITE
CLAY MINERALS
PALAGONITE
Minerals Replaced: GLASS
Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Fornari, D.
Hole: 474A Sample Midpoint (m) : 602.00
Core: 48 Top of Core Depth (m) : 599.00
Sect: 2 Top of Section Depth(m): 600.50
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (1-7), 1B (7-13), 2 (15-23), 3 (25-28),
4A (29-38), 4B (38-39), 5 (40-48), 6A (540-60),
6B (59-69), 7 (70-79), 8 (80-84), 9 (85-93),
10A (96-105), 10B (105-115), 11 (118-122),
12 (123-128), 13A (130-136), 13B (136-138),
13C (138-146), 13D (146-150);
Texture : FRESH BASALTIC GLASS OCCURS IN PCES 7+8,SLIGHTLY
ALTERED GLASS IN PCE 9,GLASSY PILLOW SELVAGES ARE
2-10MM THICK;
Structure : SEVERAL BASALT PILLOW FLOWS,FRACTURES <1MM,FRACTURES
IN PILLOW SELVAGES ARE VERTICAL & ROUGHLY RADIAL
FROM AN IMAGINARY CENTER POINT OF THE PILLOW,SMALL
CALCITE VEINLETS AT TIMES FILL FRACTURES WITH SOME
CLAY.MIN FILLING;
Alteration : FRESH
BASALT UNALTERED & SOME GLASS;
SLIGHTLY
GLASS IN PCE 9;
Comments : BEDIUM-GRAY BASALT,PARTS OF GLASSY SELVAGES WERE
DESTROYED BY THE DRILLING & CARRIED OFF WITH THE
CUTTINGS;
Phenocrysts: PLAGIOCLASE
Size(mm): 2-10
ANHEDRAL TO SUBHEDRAL & SOME EUHEDRAL,MEGAPHENOS;
Replacement: CALCITE
CLAY MINERALS
Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Fornari, D.
Hole: 474A Sample Midpoint (m) : 603.50
Core: 48 Top of Core Depth (m) : 599.00
Sect: 3 Top of Section Depth(m): 602.00
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (0-9), 2A (12-22), 2B (22-38), 2C (38-49),
3A (51-57), 3B (57-66), 3C (64-80), 4 (81-84),
5 (85-88), 6 (89-90), 7 (93-97), 8 (99-104),
9 (105-109), 10 (111-118), 11A (120-129),
11B (129-140), 11C (140-148), 11D (148-149);
Texture : PHYRIC,0.5CM GLASS SELVAGE OCCURS AT TOP OF SECTION,
SIMILAR TEXTURE & COMPOSITION TO CORES 48-1 & 48-2;
Structure : WELL FRACTURED,SOME CALCITE & CLAY VEINS OCCUR
WITHIN FRACTURES,LARGE 1-2MM THICK CALCITE-ZEOL
VEINS IN PCES 10+11;
Alteration : SLIGHTLY TO MOD
AREAS WITH VEINS;
Comments : MEDIUM-GRAY BASALT;
Phenocrysts: PLAGIOCLASE
Size(mm): 5-10
MEGACRYSTS;
CLINOPYROXENE
OLIVINE
Replacement: CALCITE
ZEOLITE
CLAY MINERALS
Leg : 64 Top/Bottom Interval(mm): 0/1350 Analyst: Fornari, D.
Hole: 474A Sample Midpoint (m) : 604.85
Core: 48 Top of Core Depth (m) : 599.00
Sect: 4 Top of Section Depth(m): 603.50
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (1-12), 1B (9-16), 2 (18-25), 3 (27-31),
4A (33-39), 4B (39-45), 5 (47-50), 6 (52-59),
7 (60-65), 8 (67-80), 9 (82-90), 10 (92-103),
11 (105-111), 12 (113-118), 13 (121-123),
14 (126-130), 15A (132-134), 15B (132-134);
Texture : PHYRIC,PCES 9-10 FRESH GLASSY SELVAGES,TEXTURE &
COMPOSITION SIMILAR TO CORES 48-1 THRU 48-3;
Structure : CALCITE VEINS FILL FRACTURES,FAIRLY HIGHLY
FRACTURED;
Alteration : FRESH
SLIGHTLY
ALTERED GLASS SELVAGE PCE 1;
Comments : MEDIUM-GRAY BASALT;
Phenocrysts: PLAGIOCLASE
MEGACRYSTS EVENLY DISTRIBUTED & ABUNDANT,ONE PLAG
MEGACRYST IN GLASS SELVAGE INDICATED MEGACRYSTS
ARE PRE-ERUPTIVE;
CLINOPYROXENE
OLIVINE
Replacement: PALAGONITE
Minerals Replaced: GLASS
PALAGONITIZED GLASS SELVAGE PCE 1;
CALCITE
CLAY MINERALS
Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 609.50
Core: 49 Top of Core Depth (m) : 608.00
Sect: 1 Top of Section Depth(m): 608.00
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (2-18), 2A (21-27), 2B (27-31), 2C (28-34),
2D (34-39), 2E (37-46), 2F (47-52), 3 (54-60),
4 (63-68), 5 (69-71), 6A (72-74), 6B (72-77),
7A (79-82), 7B (80-86), 7C (87-90), 8 (93-97),
9A (99-106), 9B (105-110), 9C (109-111),
9D (111-118), 9E (118-121), 10A (122-135),
10B (135-141), 10C (141-148), 10D (145-148);
Texture : PHYRIC,APHANITIC,GLASSY SELVAGE AT TOP OF PCE 1;
Structure : FRACTURES UP TO 1CM WIDE(PCE 2E) FILLED WITH CALCITE
& CLAY.MIN IN A SUBVERTICAL TREND WITH THINNER
FRACTURES RUNNING VERTICALLY,ENTIRE SECTION VERY
FRACTURED;
Alteration : MOD
PCES 2A-9E & TOP OF PCE 1;
Comments : DARK GRAY BASALT;
Phenocrysts: PLAGIOCLASE (TO 15%)
Size(mm): 1-15
MEGACRYSTS EVENLY DISTRIBUTED THROUGHOUT,SOME
PHENOS IN GLASS SELVAGE IN PCE 1;
CLINOPYROXENE
VISIBLE IN PCES 2A+2F+10A;
Replacement: CALCITE
CLAY MINERALS
Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 611.00
Core: 49 Top of Core Depth (m) : 608.00
Sect: 2 Top of Section Depth(m): 609.50
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (2-5), 2 (5-8), 3 (10-28), 4 (31-36),
5D (38-41), 6 (43-45), 7 (47-58), 8 (60-63),
9 (65-74), 10 (75-82), 11A (83-89), 11B (88-92),
11C (92-95), 11D (95-102), 11E (95-100),
12 (108-115), 13 (106-108), 14 (120-123),
15A (125-134), 15B (134-138), 15C (138-140),
15D (140-145), 15E (145-149);
Texture : PHYRIC,APHANITIC,GLASSY SELVAGE PCE 4;
Structure : PILLOW,CALCITE-CLAY.MIN(?)-FILLED VINS IN A SUB-
VERTICAL TREND,HORIZONTAL CRACKS IN SEVERAL PCES,
HIGHLY FRACTURED;
Alteration : FRESH
MOD
RESTRICTED TO SOME VEINS;
Comments : DARK GRAY;
Phenocrysts: PLAGIOCLASE (TO 10%)
Size(mm): 2-15
MEGACRYSTS;
Replacement: CALCITE
CLAY MINERALS
ID CLAY.MIN UNCERTAIN;
Leg : 64 Top/Bottom Interval(mm): 0/1450 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 612.45
Core: 49 Top of Core Depth (m) : 608.00
Sect: 3 Top of Section Depth(m): 611.00
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (1-15), 2 (16-26), 3A (28-39), 3B (40-50),
3C (50-56), 3D (55-61), 4 (63-66), 5 (70-71),
6 (73-82), 7 (84-86), 8A (88-100), 8B (101-110),
8C (109-115), 8D (115-121), 9A (122-130),
9B (130-137), 9C (137-145);
Texture : PHYRIC,GLASSY SELVAGE ON PCE 6,APHANITIC;
Structure : HIGHLY FRACTURED,PCE 6 SOME CALCITE-CLAY.MIN VEINS;
Alteration : FRESH
MINOR ALTERATION;
Comments : DARK-GRAY BASALT;
Vesicles :
Location: Filling: CHLOR
PCE 9;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 15
MEGACRYSTS DISTRIBUTED EVENLY;
CLINOPYROXENE
PCE 9;
Replacement: CLAY MINERALS
CALCITE
Leg : 64 Top/Bottom Interval(mm): 0/ 450 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 612.95
Core: 49 Top of Core Depth (m) : 608.00
Sect: 4 Top of Section Depth(m): 612.50
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (3-8), 2 (10-15), 3 (18-20), 4 (21-24),
5 (25-28), 6 (30-34), 7 (36-43);
Texture : PHYRIC,APHANITIC,GLASSY SELVAGE PCE 2;
Structure : CALCITE-FILLED VEINS & FRACTURES WITH CLAY.MIN IN
PCE 2;
Alteration : FRESH
Comments : DARK GRAY BASALT;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 10
MEGACRYSTS LESS ABUNDANT THAN PREVIOUS SECTIONS;
Replacement: CALCITE
CLAY MINERALS
Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 618.50
Core: 50 Top of Core Depth (m) : 617.00
Sect: 1 Top of Section Depth(m): 617.00
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1A (0-11), 1B (11-16), 1C (16-22), 2A (23-36),
2B (36-44), 3 (45-51), 4 (53-78), 5A (79-85),
5B (82-86), 5C (87-91), 6 (93-103), 7 (105-113),
8A (114-120), 8B (118-127), 8C (127-135),
8D (135-140), 8E (139-147);
Texture : PHYRIC,APHANITIC;
Structure : SLICKENSLIDE STRUCTURE PCE 3(49CM) ALONG A CHLOR-
FILLED VEIN(0.5MM WIDE),CHLOR VEINS PCES 2B-4 IN A
SUBVERTICAL FASHION,THIN HORIZONTAL CRACKS
THROUGHOUT SECTION;
Alteration : FRESH
MOD
RESTRICTED TO PCES WITH CHLOR(?) VEINS & SOME
CLAY-FILLED VESICLES;
Comments : DARK GRAY BASALT;
Vesicles :
Location: Filling: CLAY.MIN
GREEN;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): 2-10
Replacement: CALCITE
CLAY MINERALS
GREEN,ID UNCERTAIN;
CHLORITE
ID CHLOR UNCERTAIN;
Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 620.00
Core: 50 Top of Core Depth (m) : 617.00
Sect: 2 Top of Section Depth(m): 618.50
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1 (0-9), 2A (11-13), 2B (12-18), 2C (18-25),
3 (27-30), 4 (32-35), 5A (37-40), 5B (40-45),
5C (45-52), 5D (52-58), 5E (58-64), 5F (58-63),
6 (65-69), 7A (70-79), 7B (79-88), 8 (90-93),
9A (95-105), 9B (108-110), 10A (113-116),
10B (117-119), 11A (121-124), 11B (125-135),
11C (133-139), 12A (140-144), 12B (144-149),
12C (146-149);
Texture : PHYRIC,APHANITIC;
Structure : CALCITE VEINS IN PCE 5C,CHLOR-FILLED VEINS IN PCES
5E+9A+11B(3MM WIDE);
Alteration : FRESH
PCES 1-7A;
MOD
PCES 7B-12C & NEAR VEINS;
Comments : DARK GRAY BASALT;
Vesicles :
Location: Filling: CLAY.MIN,CALCITE
PCES 5E-12C;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 10
MEGACRYSTS PCES 1-9B,SIZE DECREASED DOWNWARD;
Replacement: CALCITE
CLAY MINERALS
GREEN CLAY.MIN;
Size(mm): 4
PCE 5E;
Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Guerrero, J.
Hole: 474A Sample Midpoint (m) : 621.50
Core: 50 Top of Core Depth (m) : 617.00
Sect: 3 Top of Section Depth(m): 620.00
LITHOLOGY: BASALT;
Piece No. : PCES 1 (0-21), 2A (23-29), 2B (30-34), 2C (34-39),
3 (43-45), 4 (46-52), 5A (55-61), 5B (62-64),
5C (64-70), 6 (71-73), 7 (74-84), 8 (85-95),
9A (96-98), 9B (99-101), 10A (103-106),
10B (111-118), 10C (118-125), 11 (127-136),
12 (137-149);
Texture : PCES 1-3 EQUIGRANULAR APHANITIC TO VERY FINE-
GRAINED,PCES 4-12 APHANITIC EQUIGRANULAR,
HOMOGENEOUS;
Structure : PCES 1-3 BADLY FRACTURED & CUT BY GREEN CLAY-FILLED
(CHLOR?) VEINS,PCE 2C SHOWS SLICKENSLIDE ALONG VEIN
PLANE,PCES 4-12 MASSIVE;
Alteration : FRESH
PCES 4-12;
SLIGHTLY
ALTERATION SHOWN ONLY IN VESICLES OF PCES 4+5A;
MOD
PCES 1-3;
Comments : DARK GRAY BASALT,PCES 4-12 POSSIBLY NEW UNIT WHOSE
CONTACT WAS NOT RECOVERED;
Vesicles :
Location: Filling: CALCITE
PCES 4+5A;
Phenocrysts: NO MEGACRYSTS IN PCES 4-12(POSSIBLY NEW UNIT WHOSE
CONTACT WAS NOT RECOVERED);
CLINOPYROXENE
FROM THIN SECTION THIS IS ACTUALLY ALTERED OL;
Replacement: CLAY MINERALS
GREEN,POSSIBLY CHLOR;
CALCITE
Leg : 64 Top/Bottom Interval(mm): 0/ 200 Analyst: Fornari, D.
Hole: 474A Sample Midpoint (m) : 621.70
Core: 50 Top of Core Depth (m) : 617.00
Sect: 4 Top of Section Depth(m): 621.50
LITHOLOGY: APHYRIC TO PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCES 1A (1-9), 1B (9-14), 1C (15-17);
Texture : MOSTLY APHYRIC,FINE-GRAINED;
Structure : SOME CALCITE VEINS(1MM WIDE),A FEW FRACTURES;
Alteration : FRESH
Comments : MEDIUM-GRAY BASALT;
Vesicles : Size(mm): 1-2 Percent:
Location: Filling: CLAY.MIN
GREEN;
Phenocrysts: PLAGIOCLASE
EVENLY DISTRIBUTED;
Replacement: CALCITE
CLAY MINERALS
GREEN;
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