Leg : 91 Top/Bottom Interval(mm): 0/1500 Analyst: Natland, J.
Hole: 595A Sample Midpoint (m) : 71.30
Core: 10 Top of Core Depth (m) : 69.80
Sect: 1 Top of Section Depth(m): 69.80
LITHOLOGY: BASALT (POSSIBLY ANDESITE);
SIMILAR LITHOLOGY IN REST OF CORE;
Piece No. : PCE 1 (3-10), 2 (13-20), 3 (23-30), 4 (33-41),
5 (43-46), 6 (48-50), 7 (53-58), 8 (60-62),
9 (64-75), 10 (77-80), 11 (83-90), 12 (92-99),
13 (101-110), 14 (112-120), 15 (122-124),
16 (126-130), 17 (132-137), 18 (140-144),
19 (147-149);
Texture : NO GLASS PRESENT IN CORE, SOME PCES FINER-GRAINED
THAN OTHERS BUT MOST MEDIUM-GRAINED, APPEARS QUITE
FELSIC UNDER BINOCULAR SCOPE;
Alteration : MOD
ALTERATION RINDS ON ALMOST ALL CORE PCES TO LIGHT
GRAYISH BROWN(10YR 6/2) and GRAYISH BROWN(10YR 5/2),
PCES 1&2 CONTAIN RIND SWORLS CUT OFF BY LATER
RIND, CUT SURFACES STAINED TO YELLOWISH BROWN
(10YR 5/6);
FRESH
CORES OF PCES STILL REASONABLY FRESH;
Comments : CORE IS GRAY(10YR 6/1) TO LIGHT BROWNISH GRAY
(10YR 6/2), COLOR OF CORE IS MUCH LIGHTER THAN
TYPICAL MORB OR FERROBASALT, SAME LITHOLOGY IN REST
OF CORE;
Vesicles : Size(mm): TO 1MM Percent: 1
Location: Filling: CLAY, CALCITE
Shape : ROUNDED
Location: Filling: FE.HYDRX, EMPTY
THROUGHOUT CORE, FILLINGS INCLUDE CLAY and CALCITE
and FE.HYDROXIDE and SOME ARE EMPTY, PCES 1&2 ARE
EMPTY, PCES 3&9 FILLED WITH CALCITE, PCES 4-7
FILLED WITH FE.HYDROXIDE OR EMPTY, PCE 11 FILLED
WITH CLAYS?, VESICLES RARE IN PCES 2&9;
Replacement: CALCITE
FERROUS HYDROX MINS
MANGANESE OXIDE
CRACK SURFACES LINED WITH CALCITE and FE.HYDROXIDES
and MN.OXIDES;
Leg : 91 Top/Bottom Interval(mm): 0/1500 Analyst: Natland, J.
Hole: 595A Sample Midpoint (m) : 72.80
Core: 10 Top of Core Depth (m) : 69.80
Sect: 2 Top of Section Depth(m): 71.30
LITHOLOGY: BASALT (POSSIBLY ANDESITE);
SAME LITHOLOGY AS SEC 1;
Piece No. : PCE 1 (3-9), 2 (12-14), 3 (16-18), 4 (21-27),
5A (30-34), 5B (32-38), 6 (42-50), 7 (53-57),
8 (60-67), 9A (71-81), 9B (81-90), 10 (94-98),
11 (101-104), 12 (106-109), 13 (112-117),
14 (119-125), 15 (127-130), 16 (132-150);
Texture : TOP OF PCE 16 IS FINER-GRAINED THAN OTHERS (TOP OF A
COOLING UNIT);
Alteration : FRESH TO MOD
SIMILAR TO SEC 1, MOST PCES HAVE 1-3CM RINDS;
Comments : PCE 16 CONTAINS COOLING UNIT TRANSITION, SIMILAR
COLOR TO SEC 1;
Replacement: CALCITE
FERROUS HYDROX MINS
REDDISH FE.HYDROXIDES;
Leg : 91 Top/Bottom Interval(mm): 0/1500 Analyst: Natland, J.
Hole: 595A Sample Midpoint (m) : 74.30
Core: 10 Top of Core Depth (m) : 69.80
Sect: 3 Top of Section Depth(m): 72.80
LITHOLOGY: BASALT (POSSIBLY ANDESITE);
SAME LITHOLOGY AS SEC 1;
Piece No. : PCE 1 (3-10), 2 (13-21), 3 (25-29), 4 (33-35),
5 (37-40), 6 (43-50), 7 (53-60), 8 (62-70),
9 (73-80), 10 (83-90), 11 (93-103), 12 (105-113),
13 (115-122), 14 (124-131), 15 (134-140),
16 (142-149);
Structure : CALCITE VEINS COMMON, PROMINENT VEINS IN PCES 8&15,
CALCITE VEIN IN PCE 15 ENCLOSES EARLIER
FE.HYDROXIDE;
Alteration : FRESH TO MOD
PCES 1&2 MORE ALTERED THAN OTHERS, PROMINENT
ALTERATION RINDS ON MOST PCES, VEINS CLEARLY
RELATED TO SECOND EPISODE OF ALTERATION;
Comments : SIMILAR FEATURES TO SEC 1;
Replacement: CALCITE
IN VEINS;
FERROUS HYDROX MINS
IN VEIN IN PCE 15;
Leg : 91 Top/Bottom Interval(mm): 0/1400 Analyst: Natland, J.
Hole: 595A Sample Midpoint (m) : 75.70
Core: 10 Top of Core Depth (m) : 69.80
Sect: 4 Top of Section Depth(m): 74.30
LITHOLOGY: BASALT (POSSIBLY ANDESITE);
SAME LITHOLOGY AS SEC 1;
Piece No. : PCE 1A (3-15), 1B (14-20), 1C (20-23), 1D (23-35),
1E (35-45), 2 (47-55), 3 (58-64), 4 (67-75),
5 (77-85), 6 (91-95), 7 (101-106), 8 (110-113),
9 (117-122), 10 (125-127), 11 (130-133),
12 (136-140);
Texture : PCE 5 IS FINER-GRAINED THAN OTHERS (PROBABLE COOLING
UNIT TRANSITION);
Structure : FRACTURE SURFACES ON PCES 3&8&9, FE.HYDROXIDE &
CALCITE VEINS, CALCITE CROSS-CUTS OLDER VEINS IN PCE
1E;
Alteration : FRESH TO MOD
PROMINENT ALTERATION RINDS AROUND VEINS IN PCE 1;
Comments : PCES 5&12 ARE PROBABLE COOLING UNIT TRANSITIONS,
PCES 6-12 CAME FROM CORE CATCHER AND ARE OUT OF
SEQUENCE, PCE 1 IS LONGEST CONTINUOUSLY RECOVERED
PIECE OF THIS LITHOLOGY;
Replacement: CLAY
FRACTURE SURFACES LINED WITH YELLOWISH GREEN CLAY
MINERAL;
Leg : 91 Top/Bottom Interval(mm): 0/ 90 Analyst: Rosencrantz, E.
Hole: 595A Sample Midpoint (m) : 79.49
Core: 11 Top of Core Depth (m) : 79.40
Sect: 1 Top of Section Depth(m): 79.40
LITHOLOGY: SEDIMENT (SILTSTONE);
Piece No. : PCE 1 (1-6);
Comments : INDURATED DARK BROWN(10YR 4/3) SILT OR MUD, HOLE
CAVING PIECE;
Leg : 91 Top/Bottom Interval(mm): 90/1500 Analyst: Rosencrantz, E.
Hole: 595A Sample Midpoint (m) : 80.90
Core: 11 Top of Core Depth (m) : 79.40
Sect: 1 Top of Section Depth(m): 79.49
LITHOLOGY: APHYRIC BASALT;
SIMILAR LITHOLOGY IN REST OF CORE;
Piece No. : PCE 2A (10-18), 2B (16-20), 2C (20-24), 2D (23-25),
2E (29-37), 3A (39-43), 3B (43-62), 4 (63-70),
5A (71-81), 5B (77-92), 6 (93-97), 7 (99-103),
8 (105-107), 9A (109-113), 9B (113-116),
10 (118-123), 11A (125-132), 11B (131-141),
11C (141-150);
Texture : APHYRIC, FINE-GRAINED;
Structure : EXTENSIVELY FRACTURED and VEINED, FRACTURES IRREGULAR
AND POLYGONAL ANASTOMOSING WITH THICKNESS 0.5-5MM
(AVERAGE 2MM)--FILLED WITH CALCITE? (MOST) &
CELADONITE (PALE APPLE GREEN) and FE.OXIDE (LEAST);
Alteration : MOD
COLOR BANDS 5-10MM WIDE PARALLEL TO VEINS LEAVE
"UNALTERED" CORES TO FRACTURE BOUND BLOCKS, CORES
ARE SLIGHTLY MORE RED OR YELLOW THAN ROCK ADJACENT
TO FRACTURES WHICH IS DARK GREENISH and IS STAINED
BROWN, SKETCH OF ALTERATION TRIPARTITE IN INITIAL
CORE DESCRIPTIONS, ALTERED GLASS SHARD IN CALCITE
IN PCE 8;
Comments : DARK GRAY(5Y 4/1) WITH OLIVE OVERTONES, FLOW UNIT OR
COOLING UNIT BOUNDARIES PRESENT IN PCES 2A&4A&7-11A
ALTHOUGH NOT WELL DISPLAYED;
Vesicles : Size(mm): Percent: 0
Replacement: FERROUS OXIDE
STAINS VEINED/FRACTURED ROCK and ADJACENT COARSE
ROCK;
CALCITE
CELADONITE
CALCITE and CELADONITE IN FRACTURES;
Leg : 91 Top/Bottom Interval(mm): 0/1500 Analyst: Rosencrantz, E.
Hole: 595A Sample Midpoint (m) : 82.40
Core: 11 Top of Core Depth (m) : 79.40
Sect: 2 Top of Section Depth(m): 80.90
LITHOLOGY: APHYRIC BASALT;
SAME LITHOLOGY AS SEC 1;
Piece No. : PCE 1 (2-8), 2 (10-20), 3 (22-38), 4 (35-40),
5 (41-59), 6A (60-73), 6B (74-80), 6C (81-88),
7A (89-99), 7B (96-104), 8A (105-117), 8B (115-130),
9 (132-135), 10 (138-147);
Texture : BLEBS OF FE.OXIDE IN PCE 5;
Alteration : MOD
ALTERED GLASS IN PCE 10, ALTERATION BANDING LESS
DEVELOPED BELOW 95CM;
Comments : COOLING UNIT BOUNDARIES IN PCES 1&5&6A&C&10,
SIMILAR IN ALL ASPECTS TO SEC 1;
Replacement: FERROUS OXIDE
Leg : 91 Top/Bottom Interval(mm): 0/ 340 Analyst: Rosencrantz, E.
Hole: 595A Sample Midpoint (m) : 82.74
Core: 11 Top of Core Depth (m) : 79.40
Sect: 3 Top of Section Depth(m): 82.40
LITHOLOGY: APHYRIC BASALT;
SAME LITHOLOGY AS SEC 1;
Piece No. : PCE 1A (0-18), 1B (17-26), 1C (20-33);
Comments : SIMILAR IN ALL ASPECTS TO SEC 1;
Leg : 91 Top/Bottom Interval(mm): 0/ 300 Analyst: Rosencrantz, E.
Hole: 595A Sample Midpoint (m) : 84.70
Core: 12 Top of Core Depth (m) : 84.40
Sect: 1 Top of Section Depth(m): 84.40
LITHOLOGY: BASALT (POSSIBLY ANDESITE);
Piece No. : PCE 1 (2-7), 2 (8-15), 3 (15-22), 4 (24-29);
Alteration : MOD;
Comments : GRAY(10YR 6/1) TO LIGHT BROWNISH GRAY(10YR 6/2),
THESE PCES ARE HOLE CAVINGS, SEE DESCRIPTION FOR
CORE 10 SEC 1;
Leg : 91 Top/Bottom Interval(mm): 300/1500 Analyst: Rosencrantz, E.
Hole: 595A Sample Midpoint (m) : 85.90
Core: 12 Top of Core Depth (m) : 84.40
Sect: 1 Top of Section Depth(m): 84.70
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 5 (31-42), 6 (43-50), 7 (50-55), 8 (55-63),
9A (64-69), 9B (67-79), 10 (82-85), 11 (88-91),
12 (94-104), 13A (106-108), 13B (107-115),
13C (112-125), 14A (127-133), 14B (140-150);
Texture : APHYRIC, FINE-GRAINED;
Alteration : MOD;
Comments : COOLING UNIT BOUNDARIES IN PCES 7&9B&14A, SIMILAR
FEATURES TO CORE 11--SEE THAT DESCRIPTION, DARK GRAY
(5Y 4/1);
Leg : 91 Top/Bottom Interval(mm): 0/ 800 Analyst: Rosencrantz, E.
Hole: 595A Sample Midpoint (m) : 86.70
Core: 12 Top of Core Depth (m) : 84.40
Sect: 2 Top of Section Depth(m): 85.90
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1A (1-10), 1B (10-22), 1C (21-25), 1D (22-32),
1E (30-32), 1F (32-36), 2 (38-40), 3 (42-60),
4 (62-64), 5A (67-75), 5B (73-80);
Texture : APHYRIC, GRAIN SIZE COARSENS NEAR TOP OF SECTION;
Structure : GOOD DISPLAY OF FRACTURE FILLED WITH CALCITE &
CELADONITE and FE.OXIDES IN PCE 3;
Alteration : MOD;
Comments : SIMILAR IN ALL RESPECTS TO CORE 11--SEE THAT
DESCRIPTION, COOLING UNIT BOUNDARY IN PCE 5B, COLOR
IS DARK GRAY;
Replacement: CALCITE
CELADONITE
FERROUS OXIDE
CALCITE and CELADONITE and FE.OXIDE FILL FRACTURES;
Leg : 91 Top/Bottom Interval(mm): 800/ 860 Analyst: Rosencrantz, E.
Hole: 595A Sample Midpoint (m) : 86.76
Core: 12 Top of Core Depth (m) : 84.40
Sect: 2 Top of Section Depth(m): 86.70
LITHOLOGY: SEDIMENT (SILTSTONE);
Piece No. : PCE 6 (82-86);
Comments : INDURATED DARK BROWN(10YR 4/3) SILT OR MUD, CORE
CATCHER SAMPLE, SAME LITHOLOGY AS TOP OF CORE 11
SEC 1;
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