Leg : 49 Top/Bottom Interval(mm): 0/ 200 Analyst: Duff, W.
Hole: 407 Sample Midpoint (m) : 300.70
Core: 33 Top of Core Depth (m) : 300.50
Sect: CC Top of Section Depth(m): 300.60
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-3), 2 (3-6), 3 (6-13), 4 (13-20);
Texture : APHYRIC, HYPOCRYSTALLINE, PLAG AND OL? CRYSTALS
<1MM DIAMETER, RARE CLOTS OF PLAG AND OL UP TO 2MM I
PCE 2;
Alteration : PART OF OUTER SURFACE OF PCE 3 IS WEATHERED IN A
REDDISH RIND UP TO 12MM THICK BUT MUCH OF THE
OUTER SURFACE OF THIS BASALT IS THE UNALTERED
GRAY COLOR OF THE BASALT, OUTER SURFACE OF PCE 4
WEATHERED AND COATED WITH SECONDARY MINERALS;
Comments : OUTER SURFACE HAS THIN REDDISH FILM IN PCE 1,
GNDMASS IS AN UNALTERED GRAY COLOR, PCE 3 HAS A
SINGLE INCLUSION ABOUT 10 X 5CM WITH SLIGHTLY LOWER
COLOR INDEX THAN HOST BASALT;
Vesicles : Size(mm): <1 Percent:
VESICLES LINED WITH SECONDARY MINERALS IN PCE 4;
Phenocrysts: PLAGIOCLASE
Size(mm): <1
OLIVINE
Size(mm): <1
Leg : 49 Top/Bottom Interval(mm): 0/ 40 Analyst: Duff, W.
Hole: 407 Sample Midpoint (m) : 310.04
Core: 34 Top of Core Depth (m) : 310.00
Sect: CC Top of Section Depth(m): 310.10
LITHOLOGY: BASALTIC BRECCIA;
Piece No. : PCE 1 (0-4);
Texture : CLASTS OF FINE-GRAINED HOLOCRYSTALLINE BASALT
(1>2CM BUT MOST ABOUT 5MM), BASALTIC GLASS
FRAGMENTS<=5MM, PCE 1 IS ABOUT 50% MATRIX AND 50%
CLASTS, GNDMASS MATRIX IS CLAY;
Alteration : BASALTIC GLASS FRAGMENTS ARMORED WITH A 0.1MM
THICK ALTERATION RIND;
Replacement: CLAY
Minerals Replaced: GROUNDMASS
Leg : 49 Top/Bottom Interval(mm): 40/ 210 Analyst: Duff, W.
Hole: 407 Sample Midpoint (m) : 310.21
Core: 34 Top of Core Depth (m) : 310.00
Sect: CC Top of Section Depth(m): 310.04
LITHOLOGY: APHYRIC HYPOCRYSTALLINE BASALT;
Piece No. : INTERVAL (4-21CM);
Texture : APHYRIC, HYPOCRYSTALLINE;
Comments : COLOR IS (2.5YR6/0);
Vesicles : Size(mm): 0.5-1 Percent:
LOCAL VESICLE CLOTS;
Leg : 49 Top/Bottom Interval(mm): 0/ 740 Analyst: Duff, W.
Hole: 407 Sample Midpoint (m) : 320.24
Core: 35 Top of Core Depth (m) : 319.50
Sect: 1 Top of Section Depth(m): 319.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-9), 2 (10-19), 3 (20-30), 4A (31-37),
4B (38-45), 5 (47-55), 6 (56-64), 7 (65-72);
Texture : APHYRIC, HOLOCRYSTALLINE;
Alteration : MOD;
Comments : GNDMASS IS 2.5YR4/0 IN COLOR;
Vesicles : Size(mm): 0.1-0.5 Percent: 5-7
SOME RELATIVELY RICH VESICLE ZONES, VERY RARELY
UP TO 2MM IN SIZE;
Replacement: COMBINATION
Size(mm): TO 1
INCLUDING PYR AND CHALCPYR, ID UNCERTAIN, ALL
PCES CONTAIN SULFIDE UP TO 1%;
Leg : 49 Top/Bottom Interval(mm): 740/1500 Analyst: Duff, W.
Hole: 407 Sample Midpoint (m) : 321.00
Core: 35 Top of Core Depth (m) : 319.50
Sect: 1 Top of Section Depth(m): 320.24
LITHOLOGY: SEDIMENT (CLAY);
Leg : 49 Top/Bottom Interval(mm): 20/ 230 Analyst: Zolotarev, B.
Hole: 407 Sample Midpoint (m) : 321.23
Core: 35 Top of Core Depth (m) : 319.50
Sect: 2 Top of Section Depth(m): 321.02
LITHOLOGY: SEDIMENT (CLAY);
Leg : 49 Top/Bottom Interval(mm): 250/ 700 Analyst: Zolotarev, B.
Hole: 407 Sample Midpoint (m) : 321.70
Core: 35 Top of Core Depth (m) : 319.50
Sect: 2 Top of Section Depth(m): 321.25
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 2 (25-30), 3 (32-39), 4 (40-49), 5 (50-60),
6 (62-70);
Texture : APHYRIC, FINE-GRAINED, VERY RARE MICROPHENOS OF
PLAG;
Alteration : MOD;
Vesicles : Size(mm): TO 3 Percent:
Location: Filling: ZEOLITE
VESICULAR WITH VESICLES UP TO 3MM, SOME VESICLES
PARTLY FILLED WITH ZEOLITE;
Comments : GNDMASS IS 2.5YR5/0-(GRAY);
Phenocrysts: PLAGIOCLASE ( RARE%)
VERY RARE MICROPHENOS OF PLAG;
Replacement: ZEOLITE
PYRITE
Size(mm): 0.1
SMALL CRYSTALS OF SULFIDE;
Leg : 49 Top/Bottom Interval(mm): 160/ 410 Analyst: Zolotarev, B.
Hole: 407 Sample Midpoint (m) : 329.41
Core: 36 Top of Core Depth (m) : 329.00
Sect: 1 Top of Section Depth(m): 329.16
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (16-29), 2 (31-41);
Texture : APHYRIC, FINE-GRAINED, VERY RARE PHENOS OF PLAG;
Alteration : MOD;
Comments : GNDMASS COLOR IS 2.5YR5/0-(GRAY);
Vesicles : Size(mm): 0.5-1 Percent: 1
VESICLES 1% WITH SIZE UP TO 5MM-USUALLY 0.5-1.0MM;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 4
VERY RARE PHENOS OF PLAG;
Leg : 49 Top/Bottom Interval(mm): 430/1500 Analyst: Zolotarev, B.
Hole: 407 Sample Midpoint (m) : 330.50
Core: 36 Top of Core Depth (m) : 329.00
Sect: 1 Top of Section Depth(m): 329.43
LITHOLOGY: SEDIMENT (NANNOFOSSIL CHALK);
Leg : 49 Top/Bottom Interval(mm): 0/ 670 Analyst: Zolotarev, B.
Hole: 407 Sample Midpoint (m) : 331.17
Core: 36 Top of Core Depth (m) : 329.00
Sect: 2 Top of Section Depth(m): 330.50
LITHOLOGY: SEDIMENT (NANNOFOSSIL CHALK);
Leg : 49 Top/Bottom Interval(mm): 670/1500 Analyst: Zolotarev, B.
Hole: 407 Sample Midpoint (m) : 332.00
Core: 36 Top of Core Depth (m) : 329.00
Sect: 2 Top of Section Depth(m): 331.17
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (71-110), 2A (111-125), 2B (120-132),
2C (133-135), 2D (135-144);
Texture : APHYRIC, HOLOCRYSTALLINE;
Structure : CARB VEINS ABOUT 1MM THICK;
Alteration : MOD;
Comments : GNDMASS IS 2.5YR5/0;
Vesicles : Size(mm): 1 Percent: 2-3
Location: Filling: ZEOLITES
INTERVAL 67-100CM, ZEOLITES? IN AMYGDULES;
Size(mm): 1 Percent: 5-7
Location: Filling: ZEOLITES
INTERVAL 100-150CM, ZEOLITES? IN AMYGDULES;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): TO 5
Replacement: CARBONATE
ZEOLITE
IN AMYGDULES, ID UNCERTAIN;
Leg : 49 Top/Bottom Interval(mm): 0/1500 Analyst: Zolotarev, B.
Hole: 407 Sample Midpoint (m) : 333.50
Core: 36 Top of Core Depth (m) : 329.00
Sect: 3 Top of Section Depth(m): 332.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1A (1-21), 1B (21-50), 1C (50-80), 2 (83-95),
3 (95-106), 4 (108-115), 5 (116-123), 6 (124-131),
7 (131-148);
Texture : APHYRIC, PLAG PHENOS PRESENT, HOLOXTALLINE;
Structure : CARB VEINS ABOUT 1MM THICK;
Alteration : MOD;
Comments : GNDMASS IS 2.5YR5/0;
Vesicles : Size(mm): 1 Percent: 5
Location: Filling: ZEOLITE
AMYGDULES UP TO 3MM BUT USUALLY ABOUT 1MM,
ZEOLITE ID IS UNCERTAIN;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): TO 5
Replacement: CARBONATE
ZEOLITE
IN AMYGDULES, ID UNCERTAIN;
Leg : 49 Top/Bottom Interval(mm): 0/ 850 Analyst: Zolotarev, B.
Hole: 407 Sample Midpoint (m) : 339.35
Core: 37 Top of Core Depth (m) : 338.50
Sect: 1 Top of Section Depth(m): 338.50
LITHOLOGY: PLAG MOD PHYRIC BASALT;
Piece No. : PCE 1 (1-8), 2 (10-17), 3 (18-23), 4 (29-34),
5 (35-45), 6 (47-52), 7 (54-59), 8 (60-67),
9 (69-79), 10A (80-86);
Texture : MOD PHYRIC, HOLOXTALLINE;
Alteration : MOD;
Comments : GNDMASS IS 2.5YR5/0;
Vesicles : Size(mm): 1 Percent: <1
AMYGDULES WITH SIZE RARELY UP TO 2MM AND MOST
ABOUT 1MM;
Phenocrysts: PLAGIOCLASE ( 2-3%)
Size(mm): TO 7
OLIVINE
ALTERED;
Leg : 49 Top/Bottom Interval(mm): 850/1500 Analyst: Zolotarev, B.
Hole: 407 Sample Midpoint (m) : 340.00
Core: 37 Top of Core Depth (m) : 338.50
Sect: 1 Top of Section Depth(m): 339.35
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 10B (85-90), 11 (91-97), 12 (99-103),
13 (104-115), 14 (116-124), 15 (125-131),
16 (132-137), 17 (138-149);
Texture : APHYRIC, FINE-GRAINED, HOLOXTALLINE, RARE PLAG
PHENOS, MARKEDLY FINER GRAINED THAN 10A AND ABOVE,
PCE 10B CONTAINS SMALL (10X2MM) FRAGMENT OF FINE-
GRAINED BASALT?;
Alteration : MOD;
Comments : MARKED CHANGE IN GRAIN SIZE SUGGESTS DIFFERENT FLOW
UNITS, GNDMASS 2.5YR4/0-(DARK GRAY);
Phenocrysts: PLAGIOCLASE ( RARE%)
Size(mm): TO 3
RARE PLAG PHENOS UP TO 3MM;
Leg : 49 Top/Bottom Interval(mm): 0/1500 Analyst: Zolotarev, B.
Hole: 407 Sample Midpoint (m) : 341.50
Core: 37 Top of Core Depth (m) : 338.50
Sect: 2 Top of Section Depth(m): 340.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-8), 2 (10-16), 3 (17-24), 4 (25-34),
5 (35-46), 6 (48-54), 7 (55-67), 8A (68-83),
8B (85-93), 9 (95-103), 10A (104-112),
10B (110-118), 11 (120-125), 12A (125-137),
12B (133-137), 13 (139-146);
Texture : APHYRIC, FINE-GRAINED, PHENOS OF PLAG AND ALTERED
OL (VERY RARE);
Alteration : MOD;
Comments : GNDMASS COLOR 2.5YR4/0-DARK GRAY;
Vesicles : Size(mm): 0.5 Percent: <2
Location: Filling: CLAYS, ZEOLITES
IN PCES 1-9, CLAYS AND ZEOLITES PARTLY LINE
VESICLES - ID UNCERTAIN;
Phenocrysts: PLAGIOCLASE ( RARE%)
OLIVINE ( RARE%)
ALTERED;
Replacement: SULFIDES ( RARE%)
Leg : 49 Top/Bottom Interval(mm): 0/1500 Analyst: Zolotarev, B.
Hole: 407 Sample Midpoint (m) : 349.50
Core: 38 Top of Core Depth (m) : 348.00
Sect: 1 Top of Section Depth(m): 348.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (1-5), 2 (6-12), 3 (13-20), 4 (20-34),
5 (35-40), 6 (41-47), 7 (48-62), 8 (63-74),
9 (75-80), 10 (81-89), 11 (90-100), 12 (100-111),
13 (113-117), 14 (119-122), 15 (123-129),
16 (130-139), 17 (140-149);
Texture : APHYRIC, FINE-GRAINED, HOLOXTALLINE;
Structure : PCES 5+7+8+10 ARE FRACTURED;
Alteration : MOD;
Comments : GNDMASS COLOR 2.5YR5/0-(GRAY);
Vesicles : Size(mm): TO 0.5 Percent: RARE
RARE VESICLES UP TO 0.5MM, SOME PARTLY FILLED
WITH SECONDARY MINERALS;
Replacement: CELADONITE
PCES 5+7+8+10 CONTAIN CELAD;
SULFIDE ( RARE%)
VERY RARE SMALL CRYSTALS OF SULFIDES;
Leg : 49 Top/Bottom Interval(mm): 0/1500 Analyst: Zolotarev, B.
Hole: 407 Sample Midpoint (m) : 351.00
Core: 38 Top of Core Depth (m) : 348.00
Sect: 2 Top of Section Depth(m): 349.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (2-8), 2 (10-16), 3 (17-21), 4 (22-30),
5 (31-40), 6 (42-51), 7 (52-64), 8 (65-71),
9 (73-78), 10 (80-84), 11 (85-92), 12 (94-100),
13 (101-110), 14 (112-120), 15 (121-128),
16 (129-138), 17 (139-149);
Texture : APHYRIC, FINE-GRAINED, HOLOCRYSTALLINE, VERY RARE
MICROPHENOS OF PLAG;
Structure : PCES 5+12-14 ARE FRACTURED, FRACTURES FILLED WITH
CARB AND SMEC AND CELAD IN ENTIRE CORE;
Alteration : MOD;
Comments : GNDMASS COLOR 2.5YR5/0-(GRAY);
Vesicles : Size(mm): TO 1 Percent: <1
VESICULAR;
Phenocrysts: PLAGIOCLASE ( RARE%)
VERY RARE PLAG MICROPHENOS;
Replacement: SULFIDES
PCE 3 CONTAINS SULFIDES, TRACE AMOUNTS OF SULFIDE;
CARBONATE
PCES 5+12+13+14 CONTAIN CARB AND GREEN-GRAY
SECONDARY MINERAL;
CELADONITE
SMECTITE
Leg : 49 Top/Bottom Interval(mm): 0/ 860 Analyst: Zolotarev, B.
Hole: 407 Sample Midpoint (m) : 351.86
Core: 38 Top of Core Depth (m) : 348.00
Sect: 3 Top of Section Depth(m): 351.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (2-9), 2 (10-17), 3 (19-31), 4 (33-41),
5 (42-58), 6 (59-66), 7 (68-73), 8 (74-86);
Texture : APHYRIC, HOLOXTALLINE;
Structure : PCE 2 CONTAINS VEIN FILLED WITH BROWN AND GRAY
SECONDARY MINERALS;
Alteration : MOD;
Comments : GNDMASS COLOR 2.5YR5/0-GRAY;
Vesicles : Size(mm): 0.5-1 Percent: <1
SOME VESICLES FILLED WITH SECONDARY MINERAL;
Leg : 49 Top/Bottom Interval(mm): 0/1500 Analyst: Wood, D.
Hole: 407 Sample Midpoint (m) : 359.00
Core: 39 Top of Core Depth (m) : 357.50
Sect: 1 Top of Section Depth(m): 357.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-9), 2 (10-30), 3 (30-46), 4 (47-59),
5A (60-67), 5B (67-71), 6 (72-77), 7 (78-87),
8 (88-95), 9 (96-110), 10 (110-188), 11A (118-133),
11B (135-150);
Texture : APHYRIC, MEDIUM TO FINE-GRAINED, 1 OR 2 SMALL (<2MM)
PLAG PHENOS;
Structure : NUMEROUS VEINS OF SECONDARY MATERIAL WHICH ARE
LINED WITH BROWN IRON STAINED MATERIAL WITH GREEN
CHLORITIC CENTER-HYDROTHERMAL ALTERATION?, CALCITE
VEINS IN PCE 11B;
Alteration : MOD
MUCH GLASS ALTERED TO CHLORITE AND SMEC IN ENTIRE
CORE;
Comments : NO FLOW BOUNDARIES DISTINGUISHED, GNDMASS COLOR
2.5YR5/0-(GRAY);
Vesicles : Size(mm): TO 1 Percent:
Location: Filling: CHLORITE
PARTIALLY VESICULAR WITH VESICLES ABOUT 1MM OR
LESS AND LINED WITH SECONDARY CHLORITIC
MINERAL;
Phenocrysts: PLAGIOCLASE
Size(mm): <2
1 OR 2 SMALL (<2MM) PLAG PHENOS;
Replacement: PYRITE ( 1-2%)
SMALL PYRITE CRYSTALS THROUGHOUT WHICH ARE
BRASSY YELLOW IN REFLECTED LIGHT (PART OF THIS MAY
BE DUE TO THE SAW?);
CHLORITE
SMECTITE
CALCITE
Leg : 49 Top/Bottom Interval(mm): 0/1500 Analyst: Wood, D.
Hole: 407 Sample Midpoint (m) : 360.50
Core: 39 Top of Core Depth (m) : 357.50
Sect: 2 Top of Section Depth(m): 359.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-11), 2 (12-28), 3 (30-37), 4 (38-47),
5 (47-54), 6 (55-72), 7 (73-84), 8 (85-97),
9 (98-110), 10 (110-119), 11 (120-127),
12 (128-138), 13 (140-150);
Texture : APHYRIC, MEDIUM TO FINE-GRAINED, NO PLAG PHENOS;
Alteration : MOD
PCES 1-4 CONTAIN BANDS OF GREEN ALTERATION;
Comments : NO FLOW BOUNDARIES DISTINGUISHED;
Vesicles : Size(mm): Percent: 5
Location: Filling: ZEOLITE,CHLORITE
PCES 5-9 MORE VESICULAR THAN THE REMAINDER
(ABOUT 5% VESICLES), VESICLES EMPTY OR IN SOME
CASES PARTIALLY LINED WITH CHLORITE OR ZEOLITE;
Phenocrysts: PLAGIOCLASE ( 0%)
NO PLAG PHENOS;
Replacement: PYRITE ( 2%)
MUCH DISSEMINATED PYRITE (ABOUT 2%) THROUGHOUT
ROCK;
CHLORITE
IN VESICLES;
ZEOLITE
IN VESICLES;
Leg : 49 Top/Bottom Interval(mm): 0/1500 Analyst: Wood, D.
Hole: 407 Sample Midpoint (m) : 362.00
Core: 39 Top of Core Depth (m) : 357.50
Sect: 3 Top of Section Depth(m): 360.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-13), 2 (15-30), 3 (31-40), 4 (40-61),
5 (62-74), 6 (75-89), 7 (90-97), 8 (99-109),
9 (110-116), 10 (116-138), 11 (139-150);
Texture : APHYRIC, MEDIUM TO FINE-GRAINED, NO PLAG PHENOS;
Alteration : MOD
PCES 1-3 HAVE ALTERATION PATCHES, PCE 4 IS
FRESHER THAN THE REST;
Vesicles : Size(mm): Percent: <1
VESICULAR;
Phenocrysts: PLAGIOCLASE
Size(mm): 0
NO PLAG PHENOS SEEN;
Leg : 49 Top/Bottom Interval(mm): 0/ 840 Analyst: Wood, D.
Hole: 407 Sample Midpoint (m) : 367.84
Core: 40 Top of Core Depth (m) : 367.00
Sect: 1 Top of Section Depth(m): 367.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-11), 2 (12-19), 3 (20-27), 4 (27-34),
5 (35-41), 6 (42-49), 7 (50-65), 8 (65-75),
9 (76-84);
Texture : APHYRIC, PCE 4 HAS A BRECCIA ZONE;
Structure : POSSIBLE FRACTURE ZONE IN PCE 4;
Alteration : SLIGHTLY
PCES 7-9 HAVE MINIMAL SECONDARY ALTERATION;
Comments : BRECCIA ZONE IN PCE 4 CONSISTS OF ANGULAR BASALTIC
GLASS FRAGMENTS EMBEDDED IN CARB MATRIX - EITHER
REPRESENTS FRACTURE ZONE OR FLOW BOUNDARY;
Vesicles :
Location: 0 Filling:
NON VESICULAR;
Replacement: CARBONATE
Leg : 49 Top/Bottom Interval(mm): 0/1060 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 377.56
Core: 41 Top of Core Depth (m) : 376.50
Sect: 1 Top of Section Depth(m): 376.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-8), 2 (9-15), 3 (16-26), 4 (27-35),
5 (35-44), 6 (45-51), 7 (52-59), 8 (60-69),
9 (69-76), 10 (76-84), 11 (84-92), 12 (92-106);
Texture : APHYRIC, INTERGRANULAR, HOLOXTALLINE, NO VISIBLE
VARIATION IN TEXTURE OR GRAIN SIZE, PCE 1 HAS A 4MM
WIDE MARGIN OF BRECCIA CONSISTING OF PCES OF ANGULAR
BLACK GLASS? EMBEDDED IN CARB (RECRYSTALLIZED
NANNO OOZE?);
Structure : CRACKS ARE FILLED WITH APPLE GREEN SMEC AND CARB
AND/OR IRON OXIDES;
Alteration : MOD;
Comments : COLOR OF GNDMASS IS 2.57R5/0;
Vesicles : Size(mm): 0.5-1 Percent: 1
Location: Filling: SMEC
ABOUT HALF FILLED WITH SMEC OR PARTIALLY
FILLED WITH A CLEAR WHITE MINERAL WHICH IS NOT
CALCITE;
Replacement: CARBONATE
SMECTITE
SULFIDES
PCE 6 HAS MINOR SULFIDE;
Leg : 49 Top/Bottom Interval(mm): 0/1500 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 387.50
Core: 42 Top of Core Depth (m) : 386.00
Sect: 1 Top of Section Depth(m): 386.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-8), 2 (8-16), 3 (16-21), 4 (21-29),
5 (29-34), 6 (34-40), 7 (40-46), 8A (47-58),
8B (58-60), 9 (60-70), 10 (70-75), 11 (76-89),
12 (90-97), 13 (97-103), 14 (103-109),
15 (109-116), 16 (116-125), 17 (125-134),
18 (134-143), 19 (143-150);
Texture : APHYRIC, HOLOXTALLINE, INTERGRANULAR, OCCASIONAL
PLAG PHENOS, NO VISIBLE VARIATION IN TEXTURE
OR GRAIN SIZE;
Structure : MOST FRACTURES ARE THINLY COATED WITH RED-BROWN
OXIDES?, PYRITE COATS FRACTURES IN PCES 16+17+18;
Alteration : MOD;
Comments : GNDMASS COLOR IS 2.5YR5/0;
Vesicles : Size(mm): 0.5-1 Percent: 1-2
Location: Filling: SMEC
MOST VESICLES ARE FILLED WITH SMEC;
Phenocrysts: PLAGIOCLASE
Size(mm): 1
OCCASIONAL PLAG MICROPHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
Replacement: PYRITE
Leg : 49 Top/Bottom Interval(mm): 0/1500 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 389.00
Core: 42 Top of Core Depth (m) : 386.00
Sect: 2 Top of Section Depth(m): 387.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (1-7), 2 (9-13), 3 (15-19), 4 (21-25),
5 (26-32), 6 (32-40), 7 (40-46), 8 (46-52),
9 (52-60), 10 (60-68), 11 (68-80), 12 (80-86),
13 (86-101), 14 (101-108), 15 (108-115),
16 (115-122), 17 (122-131), 18 (131-150);
Texture : APHYRIC, INTERGRANULAR, SCATTERED PLAG MICROPHENOS
OR CLOTS? OF SEVERAL GRAINS, NO VISIBLE VARIATION
IN TEXTURE OR GRAIN SIZE;
Structure : DISSEMINATED SULFIDES OR SULFIDE VEINLETS IN PCES 6
AND 12-16+18, FRACTURES ARE EMPTY OR FILLED WITH
DARK GREEN SMEC AND RED BROWN OR PALE YELLOW BROWN
OXIDES;
Alteration : MOD;
Comments : GNDMASS COLOR IS 2.5YR5/0;
Vesicles : Size(mm): 0.5-1 Percent: 0-5
Location: Filling: SMEC
SCATTERED VESICLES WHICH ARE EMPTY OR FILLED WITH
SMEC;
Phenocrysts: PLAGIOCLASE
Size(mm): 1
SCATTERED PLAG MICROPHENOS (ABOUT 1MM) OR CLOTS?
OF SEVERAL GRAINS;
Replacement: SULFIDES
SMECTITE
Leg : 49 Top/Bottom Interval(mm): 0/1300 Analyst: Roberts, W.
Hole: 407 Sample Midpoint (m) : 425.30
Core: 44 Top of Core Depth (m) : 424.00
Sect: 1 Top of Section Depth(m): 424.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-8), 2 (8-29), 3A (29-43), 3B (40-46),
4A (47-51), 4B (51-53), 4C (51-53), 5 (55-60),
6A (60-78), 6B (79-86), 7 (86-95), 8 (95-100),
9A (102-104), 9B (102-104), 9C (105-108),
9D (106-108), 10 (110-115), 11 (115-125),
12 (125-130);
Texture : APHYRIC, HOLOXTLLINE, INTERGRANULAR, SCATTERED PLAG
MICROPHENOS, MICROPHENOS OF OL?, SMALL AREAS OF
APHANITIC TEXTURE, PCES 3B+4A-4C GRADE FROM GLASS?
TO 2CM WIDE ZONE OF APHANITIC TO APHYRIC, TEXTURE
VARIES FROM APHANITIC TO APHYRIC IN PCES 7+8,
PILLOW MARGINS IN PCES 3B AND 4A AND 4B AND 4C AND
8, GLASS ZONES IN PCE 8;
Structure : VEINS FILLED WITH SMEC AND MINOR SULFIDES, PYRITE
VEINS IN PCE 6A, SMEC VEINS IN PCE 11;
Alteration : MOD;
Comments : GNDMASS COLOR IS 2.5Y/5;
Vesicles : Size(mm): TO 3 Percent: 0.5-1
Location: Filling: SMEC,SULFIDES
Shape : PIPE
IN PCE 1 VESICLES TO 3MM AND ELONGATED VERTICALLY
(PIPE-LIKE), IN PCES 3A+3B BAND OF ELONGATED
VESICLES TO 3MM;
Size(mm): TO 1 Percent:
IN PCE 11;
SEVERAL VESICLE RICH ZONES;
Phenocrysts: PLAGIOCLASE
Size(mm): 2
SCATTERED PLAG MICROPHENOS;
OLIVINE
ID UNCERTAIN;
Replacement: PYRITE
CARBONATE
OXIDES
Minerals Replaced: OL
MICROPHENOS OF OL HAVE BEEN REPLACED BY PALE
YELLOW BROWN OXIDES;
SMECTITE
SMEC-CARB MIXTURE IN PCES 4A-5;
SULFIDES
Leg : 49 Top/Bottom Interval(mm): 0/1380 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 434.88
Core: 45 Top of Core Depth (m) : 433.50
Sect: 1 Top of Section Depth(m): 433.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-6), 2 (6-16), 3A (18-20), 3B (22-26),
4 (29-36), 5 (38-41), 6 (42-55), 7A (55-68),
7B (67-76), 8 (77-85), 9A (86-96), 9B (97-100),
10 (100-125), 11 (125-138);
Texture : APHYRIC, HOLOXTALLINE, INTERGRANULAR, LATH-LIKE
SHAPE OF PLAG IS OBVIOUS, ALMOST APHANITIC ZONES IN
PCES 1+3A+8B, PLAG MICROPHENOS IN PCE 7A, APHANITIC
ZONES CONTAINING PYRITE IN PCES 10+11, GLASS
SELVAGES;
Structure : YELLOW BROWN OXIDES OCCUR IN VEIN, SMEC VEINS IN PCE
8, CARB VEINS IN PCE 9A;
Alteration : MOD
DISSEMINATED PALE YELLOW BROWN OXIDES OCCUR
PSEUDOMORPHING OL;
Comments : GNDMASS COLOR IS 2.5Y4/0;
Vesicles : Size(mm): <0.5 Percent: <0.5
Location: Filling: SMEC,CARB
Shape : PIPE
Location: Filling: CALCITE,PYRITE
SPARSE SMALL VESICLES, SMEC AND CARB FILLED
VESICLE IN PCES 9B+10, PYRITE AND CALCITE
AMYGDULES IN PCE 11, VESICLES FILLED WITH
PYRITE AND UNIDENTIFIED MINERALS;
Groundmass : MAFICS
Phenocrysts: PLAGIOCLASE
PLAG MICROPHENOS IN PCE 7A;
Groundmass : GLASS
Replacement: YELLOW BROWN OXIDES OCCUR AS IRREGULAR GNDMASS
MATERIAL;
SMECTITE
Minerals Replaced: MAFICS
CHLORITE
Minerals Replaced: MAFICS
CARBONATE
Minerals Replaced: MAFICS
GNDMASS GLASS AND MAFICS LARGELY ALTERED TO SMEC
AND CHLOR AND CARB;
PYRITE
OTHER
Minerals Replaced: OL
Leg : 49 Top/Bottom Interval(mm): 0/1340 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 436.34
Core: 45 Top of Core Depth (m) : 433.50
Sect: 2 Top of Section Depth(m): 435.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-7), 2 (7-17), 3 (17-25), 4 (25-33),
5 (33-40), 6A (40-60), 6B (60-65), 7 (65-72),
11 (92-98), 12 (98-105);
Texture : APHYRIC, INTERGRANULAR, BLACK GLASS SELVAGES IN PCE
1 AND 2, PLAG MICROPHENOS IN PCE 6A, APHANITIC ZONE
AT BASE OF PCE 12, NO GLASS IN PCES 11+12;
Alteration : MOD
EXTENSIVELY STAINED WITH BROWN OXIDES, OL
PSEUDOMORPHS IN PCE 5, STRONGLY OXIDIZED ZONE
1.5CM THICK IN PCE 6B, STRONGLY OXIDIZED
APHANITIC ZONE AT BASE OF PCE 12, HEAVILY OXIDIZED
ZONES PRESENT LOCALLY THROUGHOUT CORE;
Comments : GNDMASS COLOR IS 5Y5/2;
Vesicles : Size(mm): 0.5-1 Percent: 0.5-1
Location: Filling: CARB
DISSEMINATED CARB IN AMYGDULES;
Groundmass : OLIVINE
PSEUDOMORPHS IN PCE 5;
Phenocrysts: PLAGIOCLASE
Replacement: CARBONATE
IN AMYGDULES AND GNDMASS;
Leg : 49 Top/Bottom Interval(mm): 720/1340 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 436.34
Core: 45 Top of Core Depth (m) : 433.50
Sect: 2 Top of Section Depth(m): 435.72
LITHOLOGY: PILLOW MARGIN;
Piece No. : PCE 8 (72-78), 9 (78-84), 10 (84-92), 13 (105-114),
14 (114-120), 15 (120-125), 16 (125-134);
Structure : APHANITIC BASALT IS VESICULAR;
Texture : VESICULAR BASALT IS APHANITIC AND GLASSY,
BASALT VERY FINE-GRAINED AND APHYRIC, GLASS
SELVAGES, A GRADATION FROM RED-BROWN AND BLACK
GLASS WITH BITS OF ADMIXED CARB TO GRAY GLOBULAR
ZONE TO PALE YELLOW-BROWN APHANITIC VESICULAR
GLASSY BASALT TO VERY FINE-GRAINED APHYRIC
BASALT, PILLOW MARGINS;
Alteration : MOD;
Groundmass : OLIVINE
Size(mm): 0.5
ALTERED MICROPHENOS;
Replacement: CARBONATE
Leg : 49 Top/Bottom Interval(mm): 1340/1500 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 436.50
Core: 45 Top of Core Depth (m) : 433.50
Sect: 2 Top of Section Depth(m): 436.34
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 17A (134-145), 17B (143-150);
Texture : APHYRIC, APHANITIC;
Structure : CALCITE VEINS;
Alteration : MOD;
Comments : GNDMASS COLOR 2.5Y5/0;
Vesicles : RARE AMYGDULES;
Replacement: CALCITE
Leg : 49 Top/Bottom Interval(mm): 0/ 300 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 436.80
Core: 45 Top of Core Depth (m) : 433.50
Sect: 3 Top of Section Depth(m): 436.50
LITHOLOGY: OL SPARSELY PHYRIC BASALT;
Piece No. : PCE 1 (0-9), 2 (9-20), 3 (20-30);
Texture : OL SPARSELY PHYRIC, APHANITIC, SELVAGES IN PCE 3,
PCE 3 IS A PILLOW MARGIN;
Structure : CALCITE VEINS;
Alteration : MOD;
Comments : GNDMASS COLOR 5Y5/2;
Vesicles : Size(mm): TO 5 Percent:
Location: Filling: CALCITE
Shape : PIPE
PIPE VESICLES, SOME FILLED WITH CALCITE AND OTHERS
EMPTY;
Phenocrysts: OLIVINE ( 1-2%)
Replacement: CLAY
Minerals Replaced: OL
OL MICROPHENOS REPLACED BY YELLOW-BROWN CLAY;
CALCITE
IN SOME VESICLES;
Leg : 49 Top/Bottom Interval(mm): 300/1500 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 438.00
Core: 45 Top of Core Depth (m) : 433.50
Sect: 3 Top of Section Depth(m): 436.80
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 4 (30-36), 5A (36-46), 5B (45-53), 6 (53-60),
7 (60-76), 8A (76-81), 8B (80-83), 8C (83-89),
9A (89-92), 9B (94-102), 9C (103-105), 10 (106-111),
11 (111-122), 12 (124-131), 13 (132-150);
Texture : APHYRIC, INTERGRANULAR, GRAIN SIZE <1MM IN PCES 4-9C
GRAIN SIZE >=1MM IN PCES 10-13, PLAG MICROPHENOS
SCARCE;
Structure : SMEC VEINS, CALCITE VEINS, BOTRYOIDAL BLACK OXIDES
ON VEIN WALL - PSILOMELANE?;
Alteration : MOD;
Comments : GNDMASS COLOR 2.5Y5/0;
Vesicles : VESICLES ARE SCARCE;
Phenocrysts: PLAGIOCLASE ( RARE%)
PLAG MICROPHENOS ARE SCARCE;
Replacement: CALCITE
PYRITE
IN PCES 6+7;
SMECTITE
PSILOMELANE
ID UNCERTAIN, ON VEIN WALLS;
Leg : 49 Top/Bottom Interval(mm): 0/ 620 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 438.62
Core: 45 Top of Core Depth (m) : 433.50
Sect: 4 Top of Section Depth(m): 438.00
LITHOLOGY: OL SPARSELY PHYRIC BASALT;
Piece No. : PCE 1 (0-8), 2 (9-14), 3 (14-20), 4 (20-25),
6 (36-42), 7 (42-50), 8 (50-62);
Texture : SPARSELY PHYRIC, VERY FINE-GRAINED, INTERGRANULAR;
Structure : CALCITE VEINS IN PCES 1-4 AND 7, NO VEINS IN PCES 6+
8, PYRITE IN SOME VEINS;
Alteration : MOD
PCES 1-4 AND 7 MOD OXIDIZED;
Comments : GNDMASS COLOR IN PCES 1-4 AND 7 5Y5/2, COLOR IN PCES
6+8 2.5Y5/0;
Vesicles : Size(mm): 2 Percent: 2
Location: Filling: CALCITE
CALCITE AMYGDULES IN PCES 6 AND 8, MAXIMUM 4MM;
VESICLES SCARCE IN PCES 1-4 AND 7;
Phenocrysts: OLIVINE ( 1%)
MICROPHENOS IN PCES 1-4 AND 7;
Replacement: CALCITE
PYRITE
CLAY
Minerals Replaced: OL
OL MICROPHENOS REPLACED BY PALE YELLOW-BROWN CLAY;
Leg : 49 Top/Bottom Interval(mm): 0/ 620 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 438.62
Core: 45 Top of Core Depth (m) : 433.50
Sect: 4 Top of Section Depth(m): 438.00
LITHOLOGY: PILLOW MARGIN;
Piece No. : PCE 5 (25-36);
Texture : PILLOW MARGIN, VITROPHYRIC BASALT;
Alteration : MOD
OL MICROPHENOS ARE ALTERED;
Vesicles : Size(mm): TO 3-4 Percent: 3
Location: Filling: CALCITE
50% OF VESICLES FILLED WITH CALCITE;
Phenocrysts: OLIVINE ( RARE%)
SCARCE OL MICROPHENOS;
Replacement: CALCITE
Leg : 49 Top/Bottom Interval(mm): 0/1500 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 444.50
Core: 46 Top of Core Depth (m) : 443.00
Sect: 1 Top of Section Depth(m): 443.00
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (0-6), 1B (7-15), 2 (16-25), 3 (27-38),
4 (41-50), 5 (51-65), 6 (67-80), 7 (82-87),
8A (90-97), 8B (97-107), 8C (105-115), 8D (112-115),
9 (116-125), 10A (127-135), 10B (133-139),
11 (141-149);
Texture : SPARSELY PHYRIC, INTERGRANULAR;
Structure : ENTIRE CORE A SUCCESSION OF PILLOW LAVA, CALCITE
VEINS IN PCES 3-11;
Alteration : MOD
PCES 3-11 MOD STRONGLY OXIDIZED;
Comments : GNDMASS COLOR 2.5Y5/0 IN PCES 1A-2, COLOR 5Y5/2 IN
PCES 3-11;
Vesicles : Size(mm): Percent: RARE
Location: Filling: CALCITE
RARE CALCITE AMYGDULES IN PCES 1A-2;
Location: 5 Filling: SMEC,CALCITE
UP TO 5% SMEC AMYGDULES IN PCES 3-11, CALCITE
AMYGDULES PRESENT;
VESICLE ZONES IN PCES 5+6+7 (2CM WIDE)+8
(3CM WIDE);
Phenocrysts: PLAGIOCLASE ( TO 2%)
PLAG MICROPHENOS UP TO 2%, PLAG LATHS UP TO 2MM;
OLIVINE
MICROPHENOS ALTERED, IN PCES 10A+10B;
Replacement: CALCITE
PYRITE ( RARE%)
TRACE OF PYRITE;
SMECTITE
Leg : 49 Top/Bottom Interval(mm): 0/ 980 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 445.48
Core: 46 Top of Core Depth (m) : 443.00
Sect: 2 Top of Section Depth(m): 444.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1A (0-10), 1B (10-30), 1C (28-35), 1D (35-50),
1E (50-53), 1F (55-70), 1G (70-80), 1H (80-87),
1I (87-98);
Texture : APHYRIC, HOLOXTALLINE IN PCES 1A-1G, APHYRIC IN
PCES 1A-1G, GRADES FROM APHYRIC TO APHANITIC IN
PCES 1G-1I, INTERGRANULAR;
Structure : CALCITE VEINS IN PCES 1A-1G, SMEC VEINS IN PCES
1A-1G, SHARP BREAK BETWEEN SLIGHTLY AND STRONGLY
OXIDIZED SECTIONS IN PCE 1G;
Alteration : SLIGHTLY
PCES 1A-1G;
EXT
PCES 1G-1I VERY STRONGLY OXIDIZED;
Vesicles : Size(mm): TO 3 Percent: RARE
Location: Filling: CALCITE
SPARSE CALCITE AMYGDULES UP TO 3MM IN PCES 1A-1G;
Replacement: CALCITE
SMECTITE
OXIDES
DISSEMINATED PALE BROWN OXIDES IN PCES 1A-1G;
Leg : 49 Top/Bottom Interval(mm): 980/1000 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 445.50
Core: 46 Top of Core Depth (m) : 443.00
Sect: 2 Top of Section Depth(m): 445.48
LITHOLOGY: GLASS;
Piece No. : PCE 1J (98-100);
Texture : GLASSY;
Comments : BLACK;
Leg : 49 Top/Bottom Interval(mm): 1010/1080 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 445.58
Core: 46 Top of Core Depth (m) : 443.00
Sect: 2 Top of Section Depth(m): 445.51
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 2A (101-103), 2B (104-108);
Texture : APHYRIC, APHANITIC;
Alteration : EXT
STRONGLY OXIDIZED;
Vesicles : Size(mm): TO 5 Percent:
Location: Filling: CALCITE
CALCITE AMYGDULES UP TO 5MM;
Leg : 49 Top/Bottom Interval(mm): 1080/1190 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 445.69
Core: 46 Top of Core Depth (m) : 443.00
Sect: 2 Top of Section Depth(m): 445.58
LITHOLOGY: PILLOW MARGIN;
Piece No. : PCE 3 (108-119);
Texture : APHANITIC, VITROPHYRIC, GRADES FROM CALCITE TO BLACK
GLASS TO HIGHLY OXIDIZED BASALT, PILLOW MARGIN;
Alteration : HIGHLY OXIDIZED;
Vesicles :
Location: Filling: CALCITE
Shape : PIPE
CALCITE FILLED PIPE VESICLES;
Replacement: CALCITE
Leg : 49 Top/Bottom Interval(mm): 1200/1500 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 446.00
Core: 46 Top of Core Depth (m) : 443.00
Sect: 2 Top of Section Depth(m): 445.70
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 4A (120-130), 4B (130-136), 4C (135-137),
4D (137-140), 4E (142-150);
Texture : APHYRIC, VERY FINE-GRAINED, PILLOW MARGIN SAME AS
PCE 3, GRADES DOWN INTO VERY FINE-GRAINED BASALT;
Leg : 49 Top/Bottom Interval(mm): 0/1100 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 447.10
Core: 46 Top of Core Depth (m) : 443.00
Sect: 3 Top of Section Depth(m): 446.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1A (0-12), 1B (12-20), 1C (20-26), 1D (24-26),
1E (26-29), 1F (30-35), 6 (92-98), 7 (100-110);
Texture : APHYRIC, GRADES FROM HOLOXTALLINE APHYRIC
INTERGRANULAR TO APHANITIC, A FEW PLAG MICROPHENOS;
Structure : CALCITE VEINS;
Alteration : SLIGHTLY TO EXT
GRADES FROM SLIGHTLY OXIDIZED WITH DISSEMINATED
BROWN OXIDES TO STRONGLY OXIDIZED;
Replacement: CALCITE
OXIDES
BROWN OXIDES;
Leg : 49 Top/Bottom Interval(mm): 0/1100 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 447.10
Core: 46 Top of Core Depth (m) : 443.00
Sect: 3 Top of Section Depth(m): 446.00
LITHOLOGY: PILLOW MARGIN;
Piece No. : PCE 2 (36-44), 3A (46-48), 3B (49-51), 3C (52-54),
3D (55-56), 3E (55-56), 3F (57-58), 3G (59-60),
4A (61-62), 4B (63-64), 4C (63-64), 4D (65-73),
4E (74-78), 4F (79-82), 5A (83-85), 5B (86-89);
Texture : PILLOW MARGIN, BASALT IS APHANITIC, VITROPHYRIC,
BASALT HAS ALTERED OL MICROPHENOS, GRADATION FROM
BLACK GLASS INTO SLIGHTLY OXIDIZED APHANITIC
VITROPHYRIC;
Alteration : SLIGHTLY;
Vesicles :
Location: Filling: CALCITE
CALCITE AMYGDULES PRESENT;
Phenocrysts: OLIVINE
ALTERED OL MICROPHENOS;
Replacement: CALCITE
Leg : 49 Top/Bottom Interval(mm): 1110/1200 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 447.20
Core: 46 Top of Core Depth (m) : 443.00
Sect: 3 Top of Section Depth(m): 447.11
LITHOLOGY: PILLOW MARGIN;
Piece No. : PCE 8 (111-120);
Texture : APHANITIC BASALT, THIS SELVAGE OF CALCITE AND GLASS,
BASALT GRADES DOWN TO SELVAGE OF CALCITE AND GLASS
(PILLOW MARGIN);
Replacement: CALCITE
Leg : 49 Top/Bottom Interval(mm): 1200/1500 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 447.50
Core: 46 Top of Core Depth (m) : 443.00
Sect: 3 Top of Section Depth(m): 447.20
LITHOLOGY: APHYRIC BASALT;
Piece No. : 9A (120-138), 9B (139-141), 9C (139-141),
142-143), 9E (144-150);
Texture : NITIC, FINE-GRAINED, APHYRIC, GLASS SELVAGE,
ES FROM APHANITIC TO FINE-GRAINED APHYRIC TO
NITIC GLASS SELVAGE;
Leg : 49 Top/Bottom Interval(mm): 0/ 150 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 447.65
Core: 46 Top of Core Depth (m) : 443.00
Sect: 4 Top of Section Depth(m): 447.50
LITHOLOGY: PILLOW MARGIN;
Piece No. : PCE 1A (0-15);
Texture : GRADES FROM THIN SELVAGE OF BLACK GLASS TO APHANITIC
BASALT TO APHYRIC INTERGRANULAR BASALT WHICH HAS
PLAG MICROPHENOS, PILLOW MARGIN;
Structure : SMEC VEINS IN APHYRIC BASALT;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE
PLAG MICROPHENOS;
Replacement: SMECTITE
Leg : 49 Top/Bottom Interval(mm): 160/1420 Analyst: Vennum, W.
Hole: 407 Sample Midpoint (m) : 448.92
Core: 46 Top of Core Depth (m) : 443.00
Sect: 4 Top of Section Depth(m): 447.66
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1B (16-23), 1C (24-25), 1D (26-27), 1E (28-38),
2 (40-51), 3A (52-54), 3B (55-60), 4 (61-72),
5A (73-87), 5B (88-90), 5C (88-90), 5D (91-96),
6 (96-103), 7A (103-105), 7B (106-114), 8 (114-120),
9 (120-130), 10 (130-142);
Texture : APHYRIC, APHANITIC TO VERY FINE-GRAINED APHYRIC,
LOCAL THIN (2MM) BLACK GLASS SELVAGES, GLASS IN PCES
3A AND 7A, ALTERED OL MICROPHENOS IN PCE 3B;
Structure : CALCITE VEINS, EXT CALCITE VEINING IN PCE 6;
Alteration : EXT
STRONGLY OXIDIZED;
Vesicles : Size(mm): TO 5 Percent:
Location: Filling: CALCITE
CALCITE AMYGDULES UP TO 5MM;
Phenocrysts: OLIVINE
ALTERED OL MICROPHENOS IN PCE B;
Replacement: CALCITE
Leg : 49 Top/Bottom Interval(mm): 400/1500 Analyst: Wood, D.
Hole: 407 Sample Midpoint (m) : 454.00
Core: 47 Top of Core Depth (m) : 452.50
Sect: 1 Top of Section Depth(m): 452.90
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCE 1A (40-45), 1B (45-50), 1C (51-64), 2 (65-79),
3A (81-87), 3B (87-95), 4A (96-103), 4B (103-107),
4C (107-113), 4D (114-129), 4E (130-137),
4F (137-150);
Texture : SPARSELY PHYRIC, INTERGRANULAR;
Structure : CHLORITE VEIN BETWEEN PCES 1A AND 1B WITH PYRITE,
ABUNDANT CARB VEINS;
Alteration : MOD
ALL SECTIONS QUITE HEAVILY HYDROTHERMALLY ALTERED
WITH PCES 1A+1B+1C LESS SO THAN THE REMAINDER;
Comments : ALTERED GLASS IN CONTACT WITH COARSER-GRAINED
BASALT IN PCE 3A - FLOW CONTACT?;
Vesicles :
Location: Filling: SMEC
MOD OXIDIZED ZONES CONTAIN UP TO 5% SMEC
AMYGDULES;
Size(mm): Percent: 0
PCES 3B+4A+4D+4E ARE NON-VESICULAR;
GLASS IN PCE 3A IS VESICULAR, LOCAL VESICLE
CONCENTRATIONS IN 2-3CM WIDE ZONES;
Phenocrysts: PLAGIOCLASE ( 2%)
MICROPHENOS;
OLIVINE
ALTERED OL MICROPHENOS IN PCES 4D-4F;
Replacement: CHLORITE
PYRITE
CALCITE
SULFATES ( TR%)
CARBONATE
SMECTITE
Leg : 49 Top/Bottom Interval(mm): 0/1500 Analyst: Wood, D.
Hole: 407 Sample Midpoint (m) : 455.50
Core: 47 Top of Core Depth (m) : 452.50
Sect: 2 Top of Section Depth(m): 454.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1A (0-7), 1B (7-37), 1C (37-60), 1D (60-70),
1E (70-74), 1F (75-79), 1G (79-83), 2 (84-111),
3 (112-116), 4A (117-125), 4B (117-125),
4C (125-133), 4D (134-138), 4E (140-150);
Texture : APHYRIC, DECREASE IN GRAIN SIZE IN PCE 2 TOWARDS
FLOW MARGIN, CHILLED GLASSY BASE OF FLOW AT BASE
OF PCE 2, FINE-GRAINED GLASSY TOP OF LAVA FLOW AT
TOP OF PCE 3, GRAIN SIZE INCREASES AWAY FROM FLOW
MARGIN, INTERGRANULAR, VITROPHYRIC, APHANITIC,
SCATTERED PLAG;
Structure : CALCITE VEINS IN PCES 1B+1C+1F+3 (PCE 3 IS HEAVILY
VEINED), SMEC AND CARB VEINS;
Alteration : EXT
BROWN GNDMASS BECAUSE OF OXIDATION OF OPAQUES TO
HEMATITE;
Comments : FLOW MARGIN AT PCES 3-4E, GNDMASS BROWN;
Vesicles :
Location: Filling: CARB
AMYGDALOIDAL ZONE JUST ABOVE BASE IN PCE 2;
Location: Filling: CALCITE
Shape : PIPE
CALCITE PIPE VESICLES PRESENT;
Phenocrysts: PLAGIOCLASE
Replacement: CALCITE
CARBONATE
SMECTITE
HEMATITE
Minerals Replaced: OP.MIN
GNDMASS BROWN BECAUSE OF OXIDATION OF OPAQUES TO
HEMATITE;
Leg : 49 Top/Bottom Interval(mm): 0/1400 Analyst: Wood, D.
Hole: 407 Sample Midpoint (m) : 456.90
Core: 47 Top of Core Depth (m) : 452.50
Sect: 3 Top of Section Depth(m): 455.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1A (0-8), 1B (9-17), 2 (20-40), 3 (41-45),
4 (47-50), 6A (55-70), 6B (70-75), 6C (75-81),
7A (83-110), 7B (110-113), 7C (113-115),
8A (115-119), 8B (120-122), 8C (123-126),
8D (126-129), 8E (130-133), 9 (134-140);
Texture : APHYRIC, GRAIN SIZE DECREASE TOWARD FLOW BOUNDARY,
ALTERED GLASSY SELVAGE OF PILLOW? BASALT OF THE
UNDERLYING FLOW;
Structure : CUT BY CHLORITE VEINS, CHLORITE VEIN EXPOSED IN
PCE 7C, HEMATITE VEINING IN PCE 8A, POSSIBLE
PILLOW BASALT;
Alteration : MOD
HYDROTHERMALLY ALTERED, ALTERATION (OXIDATION)
INCREASES TOWARDS FLOW BOUNDARY, MOST OXIDIZED
REGION IN PCE 8E, OXIDIZED BASALT IN PCE 9;
Comments : GNDMASS 2.5Y4/ GREY, FLOW BOUNDARY (PILLOW MARGIN)
IN PCES 8E AND 9;
Vesicles : NON VESICULAR, AMYGDULES IN PCE 9;
Replacement: CHLORITE
HEMATITE
Leg : 49 Top/Bottom Interval(mm): 0/1190 Analyst: Wood, D.
Hole: 407 Sample Midpoint (m) : 458.19
Core: 47 Top of Core Depth (m) : 452.50
Sect: 4 Top of Section Depth(m): 457.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1A (0-17), 1B (17-27), 1C (27-37), 1D (37-41),
1E (41-50), 2A (50-54), 2B (54-60), 2C (60-69),
3 (70-82), 4A (83-95), 4B (95-108), 5 (110-119);
Texture : APHYRIC, GRAIN SIZE DECREASES TOWARDS PCE 3, GLASSY
IN PCE 4A, GRAIN SIZE INCREASES AWAY FROM FLOW
BOUNDARY, GLASSY MARGIN OF FLOW SURFACE IN PCE 4A;
Structure : NUMEROUS VEINS OF CALCITE (OR ZEOLITE);
Alteration : MOD
OXIDIZED AND HYDROTHERMALLY ALTERED;
UNIT IN PCE 3 COMPLETELY OXIDIZED AND BROKEN;
Comments : BASE OF FLOW UNIT IN PCE 3 COMPLETELY OXIDIZED AND
BROKEN-JUST 1 PCE RECOVERED, BASE OF FLOW UNIT IN
PCE 3, FLOW BOUNDARY IN PCE 4A, GNDMASS 10YR6/4-
BROWN IN PLACES TO 10YR5/2-BROWN-GRAY;
Vesicles : PCE 1A IS AMYGDALOIDAL-SUGGESTING NEARNESS TO FLOW
TOP;
Replacement: CALCITE
ZEOLITE
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