Leg : 74 Top/Bottom Interval(mm): 0/1030 Analyst: Richardson, S.H.
Hole: 525A Sample Midpoint (m) : 574.63
Core: 53 Top of Core Depth (m) : 573.60
Sect: 1 Top of Section Depth(m): 573.60
LITHOLOGY: SEDIMENT;
Leg : 74 Top/Bottom Interval(mm): 1030/1500 Analyst: Richardson, S.H.
Hole: 525A Sample Midpoint (m) : 575.10
Core: 53 Top of Core Depth (m) : 573.60
Sect: 1 Top of Section Depth(m): 574.63
LITHOLOGY: APHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 1A (103-105), 1B (106-114), 1C (114-120),
1D (120-132), 1E (133-140), 1F (140-146),
1G (145-1500;
Texture : APHYRIC,FINE-GRAINED;
Structure : MASSIVE BASALT,FRACTURES FILLED WITH CARB.UNSPEC,
THIN FRACTURE IN PCE 1D LINED WITH CARB.UNSPEC &
PYR;
Alteration : MOD TO EXT
PCE 1A TOTALLY ALTERED TO POWDERY GRAY-GREEN
CLAY.MINS;
Comments : GRAY-GREEN BASALT,PCE 1A BEGINS UNIT 1;
Vesicles : Size(mm): Percent: <1
EMPTY VESICLES;
Replacement: CARBONATE
CARB.UNSPEC FILLS FRACTURES & LINES THIN FRACTURE
IN PCE 1D;
CLAY MINERALS
GREEN-GRAY CLAY.MINS REPLACED PCE 1A;
LINES THIN FRACTURE IN PCE 1D;
Leg : 74 Top/Bottom Interval(mm): 0/1200 Analyst: Richardson, S.H.
Hole: 525A Sample Midpoint (m) : 576.30
Core: 53 Top of Core Depth (m) : 573.60
Sect: 2 Top of Section Depth(m): 575.10
LITHOLOGY: APHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 1 (1-12), 2A (14-22), 2B (22-30), 2C (30-35),
3A (37-43), 3B (42-45), 3C (43-48), 4A (50-56),
4B (57-63), 4C (63-73), 4D (73-81), 5A (83),
5B (83-91), 5C (91-101), 5D (102-110),
5E (108-116);
Texture : APHYRIC,FINE-GRAINED;
Structure : MASSIVE BASALT,VEINS WITH PYR LININGS,PCES 1-2+4-5
HAVE 1MM VEINS FILLED WITH CARB.UNSPEC;
Alteration : MOD TO EXT
Comments : GRAY-GREEN BASALT,CONTINUATION OF UNIT 1;
Vesicles : Size(mm): Percent: 1-5
Location: Filling: PYR,CARB.UNSPEC
MOSTLY EMPTY,SOME CARB.UNSPEC-FILLED VESICLES WITH
PYR LININGS;
Replacement: CARBONATE
CARB.UNSPEC FILLING VEINS & SOME VESICLES;
LINING VESICLES & VEINS;
Leg : 74 Top/Bottom Interval(mm): 0/1350 Analyst: Richardson, S.H.
Hole: 525A Sample Midpoint (m) : 577.95
Core: 53 Top of Core Depth (m) : 573.60
Sect: 3 Top of Section Depth(m): 576.60
LITHOLOGY: APHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 1A (2-13), 1B (14-20), 1C (21-28), 2 (30-31),
3 (30-43), 4 (44-46), 5 (49-61), 6 (63-66),
7A (68-80), 7B (80-89), 7C (90-98), 7D (100-106),
7E (106-113), 8A (115-117), 8B (119-120),
8C (122-125), 9 (127-135);
Texture : APHYRIC,FINE-TO-MEDIUM-GRAINED;
Structure : MASSIVE BASALT,1MM CARB.UNSPEC VEIN TRAVERSES PCES
1D+7E;
Alteration : MOD TO EXT
Comments : GRAY-GREEN BASALT,CONTINUATION OF UNIT 1;
Vesicles : Size(mm): Percent: 0-3
Location: Filling: CARB.UNSPEC
MOSTLY EMPTY,SOME FILLED WITH CARB.UNSPEC;
Replacement: CARBONATE
CARB.UNSPEC FILLS SOME VESICLES THROUGHOUT & VEIN
IN PCES 7D+7E;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Richardson, S.H.
Hole: 525A Sample Midpoint (m) : 584.60
Core: 54 Top of Core Depth (m) : 583.10
Sect: 1 Top of Section Depth(m): 583.10
LITHOLOGY: APHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 1A (1-14), 1B (14-20), 1C (20-23), 1D (23-30),
1E (30-35), 1F (35-40), 1G (39-48), 1H (48-55),
1I (55-63), 1J (63-65), 1K (65-72), 1L (73-75),
1M (75-81), 1N (82-88), 1O (87-92), 1P (92-97),
1Q (98-100), 1R (100-104), 1S (104-110),
1T (110-116), 2 (118-123), 3A (125-133),
3B (133-140), 3C (141-148);
Texture : APHYRIC,FINE-GRAINED;
Structure : MASSIVE BASALT,PERVASIVE CALCITE VEINING & SOME
ASSOCIATED PYR;
Alteration : MOD TO EXT
Comments : GREENISH-GRAY BASALT,CONTINUATION OF UNIT 1;
Vesicles : Size(mm): Percent: 0
VESICLES ABSENT EXCEPT IN ELONGATE ZONES IN PCES
1A+1T;
Replacement: CALCITE
CALCITE & PYR FOUND IN VEINS;
Leg : 74 Top/Bottom Interval(mm): 0/1150 Analyst: Richardson, S.H.
Hole: 525A Sample Midpoint (m) : 585.75
Core: 54 Top of Core Depth (m) : 583.10
Sect: 2 Top of Section Depth(m): 584.60
LITHOLOGY: APHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 1A (0-6), 1B (6-13), 1C (14-17), 1D (17-22),
2 (24-27), 3A (30-32), 3B (32-38), 3C (38-45),
3D (46-49), 3E (49-56), 4A (57-60), 4B (59-65),
4C (67-75), 4D (75-77), 4E (80-85), 4F (85-90),
4G (90-95), 4H (95-104), 4I (104-111), 4J (112-115);
Texture : APHYRIC,FINE-GRAINED,TOP OF PCE 4C MAY REPRESENT A
CHILLED MARGIN;
Structure : MASSIVE BASALT,PCES 1-3 HAVE CARB VEINS;
Alteration : MOD TO EXT
ASSOCIATED PYR;
PCES 1A-3E;
EXT
PCES 4A-4J WITH SOME ANGULAR FRAGMENTS COMPLETELY
ALTERED TO GREEN CLAY.MINS;
Comments : PCES 1A-3E GRAY BASALT,PCES 4A-4J GRAY-GREEN BASALT,
PCES 4A-4J BRECCIATED WITH CARB.UNSPEC MATRIX &
ANGULAR BASALT FRAGMENTS,CONTINUATION OF UNIT 1;
Replacement: CARBONATE
VEINS & BRECCIA MATRIX(PCES 4A-4J);
CLAY MINERALS
GREEN CLAY.MINS REPLACES BASALT ANGULAR FRAGMENTS
IN PCES 4A-4J;
Leg : 74 Top/Bottom Interval(mm): 0/ 550 Analyst: Richardson, S.H.
Hole: 525A Sample Midpoint (m) : 586.65
Core: 54 Top of Core Depth (m) : 583.10
Sect: 3 Top of Section Depth(m): 586.10
LITHOLOGY: APHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 1A (1-10), 1B (12-16), 1C (17-23), 2 (26-38),
3 (43-51);
Texture : APHYRIC,FINE-GRAINED;
Structure : MASSIVE BASALT,CALCITE VEINS IN PCES 1A-1C;
Alteration : MOD TO EXT
PCES 1A-1C;
EXT
PCES 2+3;
Comments : GREENISH-GRAY BASALT,PCES 2+3 MADE UP OF NUMEROUS
FRAGMENTS(PCE 3 FRAGMENTS ARE MUCH SMALLER),
CONTINUATION OF UNIT 1;
Replacement: CALCITE
PCE 1 VEINS;
Leg : 74 Top/Bottom Interval(mm): 0/1000 Analyst: Lever, A.
Hole: 525A Sample Midpoint (m) : 593.60
Core: 55 Top of Core Depth (m) : 592.60
Sect: 1 Top of Section Depth(m): 592.60
LITHOLOGY: APHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 1A (8-16), 1B (0-15), 2A (26-31), 2B (31-38),
2C (37-43), 2D (43-51), 2E (52-57), 3A (59-75),
3B (75-80), 3C (80-85), 4 (88-98);
Texture : APHYRIC,FINE-GRAINED,PCE 1A VERY FINE-GRAINED & MAY
REPRESENT CHILLED MARGIN MATERIAL;
Structure : MASSIVE BASALT;
Alteration : MOD TO EXT
Comments : BASALT LIGHT-TO-MEDIUM-GRAY(N5-N7),PCE 4 ENDS
UNIT 1;
Vesicles :
Location: Filling: CALCITE,PYR
VESICLES IN MOST PCES & FREQUENTLY CONTAIN CALCITE
OR(LESS COMMONLY) PYR;
Replacement: CALCITE
CALCITE & PYR FOUND IN VESICLES-PYR IS LESS COMMON
Leg : 74 Top/Bottom Interval(mm): 1000/1500 Analyst: Lever, A.
Hole: 525A Sample Midpoint (m) : 594.10
Core: 55 Top of Core Depth (m) : 592.60
Sect: 1 Top of Section Depth(m): 593.60
LITHOLOGY: SEDIMENT;
ASH;
Comments : INTERVAL 100-150CM;
Leg : 74 Top/Bottom Interval(mm): 0/ 300 Analyst: Lever, A.
Hole: 525A Sample Midpoint (m) : 594.40
Core: 55 Top of Core Depth (m) : 592.60
Sect: 2 Top of Section Depth(m): 594.10
LITHOLOGY: SEDIMENT;
Leg : 74 Top/Bottom Interval(mm): 300/1450 Analyst: Lever, A.
Hole: 525A Sample Midpoint (m) : 595.55
Core: 55 Top of Core Depth (m) : 592.60
Sect: 2 Top of Section Depth(m): 594.40
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 3A (30-36), 3B (36-41), 3C (41-45), 3D (44-49),
3E (49-55), 3F (55-62), 3G (65-70), 3H (70-75),
4 (77-82), 5A (84-91), 5B (91-98), 5C (98-103),
5D (104-108), 5E (108-116), 5F (119-128),
5G (128-141);
Texture : APHYRIC,COARSER-GRAINED THAN CORE 55-1,PCES 3H-5A
NOTICEABLY COARSER-GRAINED THAN REST OF SECTION,TOP
OF PCE 3A HAS CHILLED MARGIN;
Structure : WHITE(N9) CALCITE VEINS;
Alteration : EXT
Comments : PCE 3A BEGINS UNIT 2;
Vesicles :
Location: Filling: CALCITE,PYR
PYR & WHITE CALCITE FILL VESICLES;
Replacement: CALCITE
WHITE CALCITE IN VEINS & VESICLES;
IN VESICLES;
Leg : 74 Top/Bottom Interval(mm): 0/ 650 Analyst: Lever, A.
Hole: 525A Sample Midpoint (m) : 596.25
Core: 55 Top of Core Depth (m) : 592.60
Sect: 3 Top of Section Depth(m): 595.60
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1 (1-10), 2A (14-17), 2B (17-23), 4 (35-40),
5A (42-49), 5B (50-56), 5C (56-62);
Texture : APHYRIC,FINE-GRAINED;
Structure : CALCITE VEINS;
Alteration : MOD TO EXT
PCES 5A-5C;
EXT
PCES 1-2B+4;
Comments : LIGHT GREENISH-GRAY BASALT(PCE 4),MEDIUM-GRAY(N5)
BASALT(PCES 5A-5C),DISTINCT CHANGE IN MACROSCOPIC
TYPE OF BASALT FROM PCE 4 TO PCE 5,PCE 4 IS SAME
TYPE OF MATERIAL AS PCES 1-2B & IN CORES 55-1 & 55-2
& MAY HAVE BEEN DISPLACED DURING RECOVERY,PCE 2B
ENDS UNIT 2,PCE 5A BEGINS UNIT 3;
Vesicles :
Location: Filling: CALCITE
PCES 4-5A SOME VERY LONG CALCITE-FILLED VESICLES,
PCE 2B HAS VERY LARGE VESICLES;
Replacement: CALCITE
IN VEINS & VESICLES;
Leg : 74 Top/Bottom Interval(mm): 250/ 330 Analyst: Lever, A.
Hole: 525A Sample Midpoint (m) : 595.93
Core: 55 Top of Core Depth (m) : 592.60
Sect: 3 Top of Section Depth(m): 595.85
LITHOLOGY: SEDIMENT;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Lever, A.
Hole: 525A Sample Midpoint (m) : 603.60
Core: 56 Top of Core Depth (m) : 602.10
Sect: 1 Top of Section Depth(m): 602.10
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (2-11), 1B (30-39), 1C (17-23), 1D (23-27),
1E (26-30), 1F (30-39), 1G (39-48), 1H (49-51),
1I (51-56), 1J (55-57), 2A (60-62), 2B (60-65),
2C (65-70), 2D (70-77), 2E (77-81), 3A (84-86),
3B (88-90), 3C (91-93), 4A (97-100), 4B (101-105),
4C (107-113), 4D (113-117), 4E (118-120),
5A (123-125), 5B (126-128), 5C (130-135),
5D (135-143), 5E (142-148);
Texture : APHYRIC,FINE-GRAINED;
Structure : THIN CALCITE VEINS IN SOME PCES;
Alteration : MOD TO EXT
Comments : CONTINUATION OF UNIT 3,MEDIUM TO LIGHT GRAY BASALT;
Vesicles : Size(mm): 1-4 Percent: 30
Location: Filling: CALCITE,CARB
VESICLES FILLED WITH CALCITE OR OTHER CARB.UNSPEC;
Phenocrysts: PLAGIOCLASE
A FEW SMALL PLAG LATHS ARE PRESENT;
Replacement: CALCITE
IN VESICLES & VEINS;
CARBONATE
EITHER CALCITE OR CARB.UNSPEC FILLS VESICLES;
SMALL AMOUNTS OF PYR PRESENT;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Lever, A.
Hole: 525A Sample Midpoint (m) : 605.10
Core: 56 Top of Core Depth (m) : 602.10
Sect: 2 Top of Section Depth(m): 603.60
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (1-9), 1B (10-20), 1C (20-24), 1D (24-26),
1E (27-29), 1F (29-32), 1G (33-38), 1H (40-41),
1I (41-43), 1J (44-49), 1K (50-60), 1L (59-69),
1M (70-71), 1N (72-84), 1O (84-92), 1P (93-98),
1Q (99-105), 1R (105-111), 1S (102-116),
1T (116-120), 1U (120-125), 1V (126-128),
1W (129-136), 1X (136-142), 1Y (142-150);
Texture : APHYRIC;
Structure : PCES 1E-1H HAVE QTZ VEINS OR LARGE 3CM THICK VEIN;
Alteration : MOD TO EXT
Comments : CONTINUATION OF UNIT 3,MEDIUM TO LIGHT GRAY BASALT;
Vesicles : Size(mm): Percent: 25-30
Location: Filling: CALCITE,PYR
VESICLES PREDOMINATLY FILLED WITH CALCITE & A FEW
ALSO CONTAIN PYR(SOME WITH MARCASITE),MANY OF THE
PCES HAVE BLACK UNIDENT.MINS OUTLINING VESICLES
(ESPECIALLY THE SMALLER ONES),PCES 1W+1X HAVE
ALMOST NO VESICLES;
Replacement:
EVIDENT IN VESICLES OF PCES 1J-1K+1P-1Q;
CALCITE
MARCASITE
CONTAINED IN SOME VESICLES;
QUARTZ
IN VEINS OF PCES 1E-1H;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Lever, A.
Hole: 525A Sample Midpoint (m) : 606.60
Core: 56 Top of Core Depth (m) : 602.10
Sect: 3 Top of Section Depth(m): 605.10
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (1-8), 1B (8-13), 1C (14-20), 1D (21-26),
1E (27-32), 1F (33-36), 1G (37-44), 1H (45-48),
1I (49-55), 1J (55-61), 1K (62-70), 1L (70-75),
1M (75-80), 1N (81-87), 1O (87-92), 1P (92-98),
1Q (97-106), 1R (107-115), 1S (115-122),
1T (122-128), 1U (128-133), 1V (134-140),
1W (140-150);
Texture : APHYRIC;
Structure : CALCITE VEINS 1-10MM;
Alteration : MOD TO EXT
NO NOTICEABLE ALTERATION ZONES NOTED;
Comments : CONTINUATION OF UNIT 3,MEDIUM TO LIGHT GRAY BASALT;
Vesicles : Size(mm): Percent: 10
Location: Filling: CALCITE
Shape : ROUND,IRREG
Size(mm): Percent: 5
EMPTY VESICLES ARE SMALLER THAN FILLED ONES;
Replacement: CALCITE
IN VEINS & LARGER VESICLES;
PYR NOTICED IN SEVERAL PCES(PCE 1E FOR EXAMPLE);
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Borella, P.E.
Hole: 525A Sample Midpoint (m) : 608.10
Core: 56 Top of Core Depth (m) : 602.10
Sect: 4 Top of Section Depth(m): 606.60
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (1-2), 1B (5-13), 1C (13-18), 1D (18-25),
1E (26-34), 1F (35-42), 1G (42-50), 1H (50-57),
1I (57-59), 1J (59-66), 1K (66-70), 1L (71-75),
1M (75-82), 1N (82-86), 1O (86-91), 1P (91-94),
1Q (94-98), 1R (100-104), 1S (105-109),
1T (109-116), 1U (118-120), 1V (121-126),
1W (126-133), 1X (134-141), 1Y (140-148);
Texture : APHYRIC;
Alteration : MOD TO EXT
Comments : CONTINUATION OF UNIT 3,MEDIUM TO LIGHT GRAY BASALT;
Vesicles : Size(mm): TO 5 Percent: 10
Location: Filling: CALCITE
Shape : ROUND,IRREG
VESICLES ARE LARGE WITH MAJORITY CALCITE-FILLED,
SOME SMALL EMPTY VESICLES ALSO PRESENT;
Replacement: CALCITE
IN MAJORITY OF VESICLES;
OBSERVED IN SOME PCES(PCES 1R+1V FOR EXAMPLE);
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: O'Connell, S.
Hole: 525A Sample Midpoint (m) : 609.60
Core: 56 Top of Core Depth (m) : 602.10
Sect: 5 Top of Section Depth(m): 608.10
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (0-6), 1B (6-12), 1C (12-18), 1D (18-24),
1E (25-30), 1F (31-36), 1G (37-41), 1H (42-43),
1I (45-53), 1J (54-55), 1K (56-60), 1L (62-64),
1M (64-70), 1N (72-76), 1O (75-80), 1P (81-85),
1Q (85-87), 1R (87-92), 1S (92-98), 1T (98-103),
2A (104-115), 2B (115-121), 2C (122-128),
2D (128-134), 2E (135-144), 2F (145-150);
Texture : APHYRIC,MEDIUM-TO-COARSE-GRAINED;
Alteration : MOD TO EXT
Comments : GRAY BASALT,CONTINUATION OF UNIT 3;
Vesicles :
Location: Filling: CALCITE,UNIDENT
SOME VESICLES CALCITE-FILLED,MANY VESICLES HAVE
DARK RIMS & PALE BLUE INTERIOR LAYERS(PARTIAL
FILLING),SOME VESICLES FILLED WITH WHITE
UNIDENT.MINS;
Replacement: CALCITE
UNIDENTIFIED
SOME VESICLES FILLED WITH CALCITE,DARK UNIDENT.MIN
RIMS VESICLES WITH LAYERS OF PALE BLUE
UNIDENT.MIN,WHITE UNIDENT.MIN FILLS SOME VESICLES;
FOUND IN PCES 1D+1F+1O+2C+2F;
CLAY MINERALS
FOUND IN PCE 1J;
Leg : 74 Top/Bottom Interval(mm): 0/ 950 Analyst: Borella, P.E.
Hole: 525A Sample Midpoint (m) : 610.55
Core: 56 Top of Core Depth (m) : 602.10
Sect: 6 Top of Section Depth(m): 609.60
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (0-8), 1B (9-15), 1C (17-19), 1D (20-23),
1E (24-32), 1F (32-37), 1G (37-42), 1H (42-47),
1I (47-50), 1J (50-58), 1K (58-65), 1L (65-72),
1M (72-75), 1N (76-81), 1O (82-86), 1P (88-91);
Texture : APHYRIC;
Structure : CALCITE-FILLED VEIN IN PCES 1E-1G;
Alteration : MOD TO EXT
ALTERATION ZONE SURROUNDS VEIN OF PCES 1E-1G;
Comments : CONTINUATION OF UNIT 3,MEDIUM TO LIGHT GRAY BASALT;
Vesicles : Size(mm): TO 4 Percent: 10
Location: Filling: CALCITE
VESICLES VARY IN SIZE,LARGER VESICLES FILLED WITH
CALCITE & SMALLER VESICLES ARE EMPTY;
Replacement: CALCITE
IN VEIN & LARGER VESICLES;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: O'Connell, S.
Hole: 525A Sample Midpoint (m) : 613.10
Core: 57 Top of Core Depth (m) : 611.60
Sect: 1 Top of Section Depth(m): 611.60
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (1-3), 1B (4-11), 1C (12-20), 1D (20-25),
1E (26-27), 1F (27-35), 1G (35-40), 1H (40-45),
1I (45-50), 1J (51-60), 1K (60-67), 1L (68-73),
1M (74-76), 1N (77-82), 1O (80-86), 1P (87-90),
1Q (90-96), 1R (96-101), 1S (102-107), 1T (107-112),
1U (112-119), 1V (120-125), 1W (125-132),
1X (133-136), 1Y (137-142), 1Z (144-146);
Texture : APHYRIC;
Structure : CALCITE & PYR VEINLET(?) IN PCE 1U;
Alteration : MOD TO EXT
Comments : CONTINUATION OF UNIT 3,MEDIUM TO LIGHT GRAY BASALT;
Vesicles : Size(mm): Percent: 5-10
Location: Filling: CALCITE
CALCITE FILLING % VARIES CONSIDERABLY,VERY LITTLE
CALCITE IN INTERVAL 86-146CM;
Phenocrysts: FELDSPAR
Size(mm): 1
FEW SMALL FELD LATHS & SOME HAVE REFLECTIVE
SURFACE;
Replacement: CALCITE
IN SOME VESICLES & IN VEINLET(?) OF PCE 1U,VERY
LITTLE CALCITE IN INTERVAL 86-146CM;
FOUND IN PCE 1H & IN VEINLET(?) IN PCE 1U;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Borella, P.E.
Hole: 525A Sample Midpoint (m) : 614.60
Core: 57 Top of Core Depth (m) : 611.60
Sect: 2 Top of Section Depth(m): 613.10
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (0-10), 1B (10-15), 1C (16-22), 1D (23-25),
1E (26-30), 1F (31-34), 1G (35-39), 1H (40-49),
1I (50-55), 1J (55-61), 1K (61-66), 1L (65-74),
1M (75-80), 1N (80-85), 1O (85-95), 1P (95-109),
1Q (110-112), 1R (117-121), 1S (123-127),
1T (127-133), 1U (133-142);
Texture : APHYRIC;
Structure : 1-2MM THICK CALCITE VEIN IS CONTINUOUS IN PCES
1E-1U;
Alteration : MOD TO EXT
NO ALTERED ZONE AROUND VEIN IN PCES 1E-1U;
Comments : CONTINUATION OF UNIT 3,MEDIUM TO LIGHT GRAY BASALT,
GRAPHIC REPRESENTATION INCLUDES A PCE(WITH NO PCE
NUMBER ASSIGNED) BELOW PCE 1U-PHOTOGRAPH OF CORE
DOES NOT SHOW THIS PCE;
Vesicles : Size(mm): TO 4 Percent: 10-20
Location: Filling: CALCITE,PYR
MOST VESICLES EMPTY WITH ABOUT ONE-THIRD
CONTAINING CALCITE,FEW FILLED WITH PYR;
Replacement: CALCITE
IN VEIN & IN SOME VESICLES;
FEW VESICLES FILLED WITH PYR;
Leg : 74 Top/Bottom Interval(mm): 0/1450 Analyst: O'Connell, S.
Hole: 525A Sample Midpoint (m) : 616.05
Core: 57 Top of Core Depth (m) : 611.60
Sect: 3 Top of Section Depth(m): 614.60
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (2-12), 1B (12-23), 1C (24-36), 1D (35-46),
1E (47-52), 1F (53-66), 1G (68-80), 1H (79-86),
1I (87-95), 1J (95-103), 1K (103-108), 1L (108-112),
1M (112-125), 1N (125-131), 1O (133-139),
1P (140-145);
Texture : APHYRIC;
Structure : PCES 1A-1B HAVE CALCITE VEIN(TO 2MM WIDE &
CONTINUOUS FROM CORE 57-2) WITH SMALL AMOUNT OF PYR
& A FEW CLAY.MINS,PCE 1F HAS MAJOR CALCITE VEIN
EXTENDING INTO CORE 57-4(OTHER UNIDENT.MINS PRESENT
2-5MM WIDE);
Alteration : MOD TO EXT
NO OBVIOUS ALTERATION ZONES;
Comments : CONTINUATION OF UNIT 3,MEDIUM TO LIGHT GRAY BASALT;
Vesicles : Size(mm): 1-3 Percent: 1-10
Location: Filling: CALCITE
VESICLES HALF-FILLED WITH CALCITE,LARGER VESICLES
(TO 3MM) ARE FILLED;
Phenocrysts: PLAGIOCLASE
Size(mm): 1
SMALL PLAG LATHS PRESENT IN SOME PCES;
Replacement: CALCITE
CALCITE VEIN IN PCE 1F;
PCES 1B+1D+1G+1M,SOME PYR IN VEIN OF PCE 1A;
CLAY MINERALS
IN PCES 1A+1B;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Borella, P.E.
Hole: 525A Sample Midpoint (m) : 617.60
Core: 57 Top of Core Depth (m) : 611.60
Sect: 4 Top of Section Depth(m): 616.10
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (2-7), 1B (7-17), 1C (17-29), 1D (30-41),
1E (42-50), 1F (51-60), 1G (61-66), 1H (67-70),
1I (70-75), 1J (75-80), 1K (81-85), 1L (87-91),
1M (93-100), 1N (101-109), 1O (109-115),
1P (115-120), 1Q (120-126), 1R (127-130),
1S (132-137), 1T (127-145), 1U (145-150);
Texture : APHYRIC;
Structure : CONTINUOUS VERTICAL CALCITE VEIN TO 4MM THICK
OBSERVED IN PCES 1A-1J;
Alteration : MOD TO EXT
FEW AREAS ALONG VEIN ARE RESULT OF ALTERATION;
Comments : MEDIUM TO LIGHT GRAY BASALT;
Vesicles : Size(mm): 1-5 Percent: 10
Location: Filling: CALCITE
SOME VESICLES FILLED WITH CALCITE OTHERS ARE VOID;
Phenocrysts: FELDSPAR
Size(mm): <1
TOWARD BOTTOM OF SECTION SOME FELD LATHS ARE
NOTICEABLE;
Replacement: CALCITE
IN SOME VESICLES & FILLS VEIN IN PCES 1A-1J;
OBSERVED IN PCE 1A;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: O'Connell, S.
Hole: 525A Sample Midpoint (m) : 619.10
Core: 57 Top of Core Depth (m) : 611.60
Sect: 5 Top of Section Depth(m): 617.60
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (1-6), 1B (6-17), 1C (17-24), 1D (24-30),
1E (31-40), 1F (40-47), 1G (47-53), 1H (53-67),
1I (67-75), 1J (75-83), 1K (83-91), 1L (92-99),
1M (100-107), 1N (107-116), 1O (117-122),
1P (122-135), 1Q (135-140), 1R (141-149);
Texture : APHYRIC;
Structure : PCES 1F-1M HAVE CALCITE VEIN(1-4MM);
Alteration : MOD TO EXT
NO VISIBLE ALTERATION AROUND VEIN;
Comments : CONTINUATION OF UNIT 3,MEDIUM TO LIGHT GRAY BASALT;
Vesicles : Size(mm): <1 Percent: 5-20
Location: Filling: CALCITE
LESS THAN 10% OF VESICLES FILLED WITH CALCITE;
Phenocrysts: FELDSPAR
A FEW LATHS PRESENT;
Replacement: CALCITE
FILLS VEIN OF PCES 1F-1M & 10% OF VESICLES;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Borella, P.E.
Hole: 525A Sample Midpoint (m) : 620.60
Core: 57 Top of Core Depth (m) : 611.60
Sect: 6 Top of Section Depth(m): 619.10
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (1-16), 1B (16-24), 1C (25-32), 1D (33-41),
1E (42-55), 1F (56-61), 1G (63-68), 1H (69-73),
1I (74-87), 1J (87-93), 1K (94-98), 1L (99-106),
1M (107-113), 1N (114-117), 1O (118-123),
1P (123-130), 1Q (130-135), 1R (136-141),
1S (142-147);
Texture : APHYRIC;
Structure : PCES 1A-1C+1N-1S HAVE CALCITE VEINS 1-3MM THICK;
Alteration : MOD TO EXT
Comments : CONTINUATION OF UNIT 3,MEDIUM TO LIGHT GRAY BASALT;
Vesicles : Size(mm): 1-5 Percent: 10
Location: Filling: CALCITE
MOST VESICLES EMPTY-OTHERS FILLED WITH CALCITE;
Replacement: CALCITE
FILLS VEINS & SOME VESICLES;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: O'Connell, S.
Hole: 525A Sample Midpoint (m) : 622.60
Core: 58 Top of Core Depth (m) : 621.10
Sect: 1 Top of Section Depth(m): 621.10
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (0-11), 1B (11-21), 1C (21-28), 1D (28-34),
2A (35-44), 2B (44-55), 3 (58-63), 4A (66-72),
4B (73-92), 4C (93-99), 4D (100-112), 5A (113 117),
5B (118-122), 5C (122-130), 5D (130-136),
5E (138-143), 5F (143-150);
Texture : APHYRIC,FINE-TO-MEDIUM-GRAINED;
Structure : PILLOW BASALT & FLOWS,DENSITY INCREASING DOWNWARD,
SEPARATE THIN(<1MM) CALCITE VEINS IN PCES 1A-1C;
Alteration : MOD
MORE DENSE PCES PROBABLY LESS ALTERED;
Comments : MEDIUM GRAY BASALT,CONTINUATION OF UNIT 3;
Vesicles : Size(mm): Percent: 1-20
Location: Filling: CALCITE
ALMOST ALL(>99%) OF VESICLES CALCITE-FILLED;
Phenocrysts: PLAGIOCLASE
MAFICS
SMALL PLAG LATHS & FEW MAFIC.MINS PRESENT;
Replacement: CALCITE
FILLS VEINS IN PCES 1A-1C & ALMOST ALL VESICLES;
Leg : 74 Top/Bottom Interval(mm): 0/ 810 Analyst: Borella, P.E.
Hole: 525A Sample Midpoint (m) : 623.41
Core: 58 Top of Core Depth (m) : 621.10
Sect: 2 Top of Section Depth(m): 622.60
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (2-5), 2A (8-13), 2B (13-20), 2C (21-26),
2D (27-35), 2E (36-41), 2F (42-51), 2G (51-64),
2H (65-71), 2I (71-76), 2J (76-81);
Texture : APHYRIC,GRAINSIZE DECREASES FROM MEDIUM-GRAINED IN
PCE 2A TO VERY FINE-GRAINED IN PCE 2J(LOWER CHILLED
MARGIN);
Structure : VEINS IN PCES 2D+2H-2J;
Alteration : MOD
Comments : PCE 2J ENDS UNIT 3,MEDIUM GRAY BASALT;
Vesicles : Size(mm): TO 10 Percent:
Location: Filling: CALCITE,PYR
LARGER VESICLES(10MM) FILLED WITH CALCITE &
RESEMBLE GEOPETAL STRUCTURES,PYR IS FOUND AT
BOTTOM OF ONE VESICLE,AMOUNT OF VESICLES INCREASE
TOWARD BOTTOM;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 1
PLAG LATHS;
Replacement: CALCITE
FILLS VESICLES;
FOUND AT BOTTOM OF ONE VESICLE;
Leg : 74 Top/Bottom Interval(mm): 810/1500 Analyst: Borella, P.E.
Hole: 525A Sample Midpoint (m) : 624.10
Core: 58 Top of Core Depth (m) : 621.10
Sect: 2 Top of Section Depth(m): 623.41
LITHOLOGY: SEDIMENT;
Piece No. : PCES 3 (83-88), 4 (90-150);
Comments : PCE 3 HAS CALCITE ON TOP & CHERT & LIMESTONE ON
BOTTOM,PCE 4 HAS LIMESTONE ONLY;
Leg : 74 Top/Bottom Interval(mm): 0/1050 Analyst: Futterer, D.
Hole: 525A Sample Midpoint (m) : 625.15
Core: 58 Top of Core Depth (m) : 621.10
Sect: 3 Top of Section Depth(m): 624.10
LITHOLOGY: SEDIMENT;
Piece No. : PCE 1 (0-103);
Comments : LIMESTONE;
Leg : 74 Top/Bottom Interval(mm): 1050/1450 Analyst: Futterer, D.
Hole: 525A Sample Midpoint (m) : 625.55
Core: 58 Top of Core Depth (m) : 621.10
Sect: 3 Top of Section Depth(m): 625.15
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 2 (105-110), 3 (112-115), 4A (118-125),
4B (126-132), 4C (132-138), 4D (138-143);
Texture : APHYRIC,TOP OF PCE 2 IS VERY FINE-GRAINED(UPPER
CHILLED MARGIN);
Structure : CALCITE VEIN IN PCES 4A-4C,PILLOW BASALT & FLOWS;
Alteration : MOD
Comments : PCE 2 BEGINS UNIT 4,GRAY BASALT,PCE NUMBERS IN
VISUAL CORE DESCRIPTION ARE CONFUSING;
Vesicles : Size(mm): TO 20 Percent:
Location: Filling: CALCITE
Shape : ELLIPTICAL
VERY LARGE ELLIPTICAL VESICLES IN PCE 2 FILLED
WITH CALCITE,VERY FEW VESICLES IN OTHER PCES ARE
FILLED,VESICLES ARE SPARSE(5%) IN PCE 4C(?);
Phenocrysts: FELDSPAR
Size(mm): TO 1
SMALL FELD LATHS WITH ONE LARGE LATH IN PCE 4C(?);
Replacement: CALCITE
IN VESICLES & IN VEIN OF PCES 4A-4C(?);
FOUND IN PCE 2;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: O'Connell, S.
Hole: 525A Sample Midpoint (m) : 627.10
Core: 58 Top of Core Depth (m) : 621.10
Sect: 4 Top of Section Depth(m): 625.60
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (2-8), 1B (9-13), 1C (13-16), 1D (17-21),
2A (26-29), 2B (30-36), 2C (37-42), 2D (42-49),
3 (50-61), 4A (62-71), 4B (72-79), 4C (79-88),
4D (88-105), 4E (106-110), 5 (113-115),
6A (118-126), 6B (126-132), 6C (132-139),
6D (140-148);
Texture : APHYRIC,PCES 1D+2C CONTAIN ALTERED PILLOW
MARGINS(?);
Structure : PILLOW BASALT & FLOWS,GREENISH-GRAY CLAY.MIN(?) VEIN
IN PCES 1D+2C,PCE 2D HAS 5MM CALCITE & GREENISH-GRAY
CLAY.MIN(?) VEIN,PCE 4A HAS 4MM CALCITE VEIN;
Alteration : MOD
ALTERATION ZONE ALONG VEIN IN PCE 2C,POSSIBLE
ALTERED PILLOW MARGINS IN PCES 1D+2C;
Comments : CONTINUATION OF UNIT 4,MEDIUM GRAY BASALT;
Vesicles : Size(mm): Percent: 1-5
Location: Filling: CALCITE,PYR
Shape : ELONGATE
VESICLES LESS ABUNDANT THAN CORE 58-3,PCE 6A HAS
ELONGATE CALCITE-FILLED VESICLES,PYR IN SOME
VESICLES;
Phenocrysts: FELDSPAR
Size(mm): 1
VERY SMALL FELD LATHS;
Replacement: CLAY MINERALS
ID GREENISH-GRAY CLAY.MIN UNCERTAIN IN VEINS OF
PCES 1D+2C+2D;
CALCITE
IN VESICLES & VEINS(PCES 2D+4A);
IN SOME VESICLES,PCES 1A+4A-4C+6B;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Richardson, S.H.
Hole: 525A Sample Midpoint (m) : 628.60
Core: 58 Top of Core Depth (m) : 621.10
Sect: 5 Top of Section Depth(m): 627.10
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
MASSIVE BASALT;
Piece No. : PCES 1 (2-8), 2 (9-16), 3 (18-28), 4A (30-40),
4B (40-48), 4C (48-54), 4D (54-60), 5 (62-68),
6A (70-72), 6B (73-75), 6C (75-77), 7A (79-83),
7B (83-90), 7C (91-95), 7D (96-100), 8A (103-110),
8B (110-115), 8C (116-120), 8D (121-125),
9 (130-137), 10 (140-149);
Texture : APHYRIC,FINE-GRAINED,GLASSY FLOW MARGIN ON TOP OF
PCE 6B;
Structure : MASSIVE PILLOW BASALT(FLOW INTERIORS),VOIDS & VEINS
& STRINGERS FILLED WITH CARB.UNSPEC,10MM THICK DARK
ELONGATE VESICULAR ZONES FORMING VOIDS;
Alteration : MOD
Comments : CONTINUATION OF UNIT 4,MEDIUM GRAY BASALT;
Vesicles : NO DISCRETE VESICLES,ELONGATE VESICULAR ZONES
FORMING VOIDS;
Replacement: CARBONATE
CARB.UNSPEC FILLS VOIDS & VEINS & STRINGERS,
CARB.UNSPEC & DARK GREEN-BLACK SMEC COMPRISE VEIN
OF PCE 9;
SMECTITE
10MM DARK GREEN-BLACK SMEC & CARB.UNSPEC VEIN
TRAVERSES PCE 9;
Leg : 74 Top/Bottom Interval(mm): 0/ 400 Analyst: Richardson, S.H.
Hole: 525A Sample Midpoint (m) : 629.00
Core: 58 Top of Core Depth (m) : 621.10
Sect: 6 Top of Section Depth(m): 628.60
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
MASSIVE BASALT;
Piece No. : PCES 1 (2-9), 2A (10-13), 2B (14-18), 3 (21-27),
4 (31-37);
Texture : APHYRIC,FINE-GRAINED;
Structure : CARB.UNSPEC-FILLED VEIN,MASSIVE PILLOW BASALT;
Alteration : MOD
Comments : CONTINUATION OF UNIT 4,MEDIUM TO DARK GRAY BASALT;
Vesicles :
Location: Filling: CARB.UNSPEC
Shape : ELONGATE
ELONGATE VESICULAR ZONES FILLED WITH CARB.UNSPEC;
Replacement: CARBONATE
FILLS VEINS & VESICLES;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: O'Connell, S.
Hole: 525A Sample Midpoint (m) : 632.10
Core: 59 Top of Core Depth (m) : 630.60
Sect: 1 Top of Section Depth(m): 630.60
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (1-2), 1B (3-6), 1C (6-10), 1D (10-12),
1E (13-16), 1F (13-16), 1G (16-22), 1H (23-27),
1I (27-32), 1J (32-36), 1K (36-42), 1L (43-44),
1M (45-49), 1N (50-55), 1O (55-56), 1P (57-62),
1Q (62-68), 1R (68-72), 1S (72-80), 1T (80-85),
1U (86-92), 1V (92-99), 1W (99-107), 1X (107-113),
1Y (113-117), 1Z (118-122), 1AA (122-127),
1BB (127-136), 1CC (136-141), 1DD (141-146);
Texture : APHYRIC,COARSE-GRAINED,GLASSY AREAS ARE PRESENT IN
THE BRECCIATED AREAS BETWEEN UNITS(?) & PROBABLY
MARK THE INTERSERTION OF PILLOWS;
Structure : PILLOW BASALT & FLOWS,PCES 1O-1DD CONTIAN SOME WIDE
(10MM) CALCITE VEINS;
Alteration : MOD
Comments : CONTINUATION OF UNIT 4,MEDIUM GRAY BASALT,DARK GREEN
BRECCIA IN PCES 1H+1N,SMALL BRECCIA ZONE ON TOP OF
PCE 1DD(MOSTLY INTENSE VEINATION-GREEN FILLING IS
NON-CALCIC);
Vesicles :
Location: Filling: PYR,CALCITE
Shape : ROUND,ELLIPT
ROUNDED & ELLIPTICAL VESICLES PRESENT-ALMOST ALL
FILLED WITH CALCITE,VERY IRREGULAR VUG AREAS IN
PCES 1O-1DD WHICH ARE DARKER THAN SURROUNDING
BASALT(AS IF A SEPARATE UNIT) & CONTAIN MULTIPLE &
VARIED FILLED & EMPTY VESICLES;
Phenocrysts: PLAGIOCLASE
OLIVINE
VERY SMALL PLAG LATHS,OL ALTERED;
Replacement: UNIDENTIFIED
OL ALTERED TO UNIDENT.MINS,DARK GREEN UNIDENT.MINS
IN BRECCIA(NON-CALCIC);
CALCITE
IN VESICLES & VEINS & VUGS;
IN SOME VESICLES;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Borella, P.E.
Hole: 525A Sample Midpoint (m) : 633.60
Core: 59 Top of Core Depth (m) : 630.60
Sect: 2 Top of Section Depth(m): 632.10
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (2-8), 1B (9-16), 1C (16-23), 1D (24-30),
1E (30-36), 1F (37-40), 1G (37-40), 1H (40-45),
1I (46-52), 2 (54-60), 3A (61-63), 3B (65-70),
3C (71-78), 3D (79-85), 3E (85-89), 3F (85-88),
3G (88-92), 3H (92-95), 3I (95-100), 3J (101-107),
3K (107-112), 3L (113-120), 3M (120-125),
3N (126-133), 3O (133-139), 3P (139-147),
3Q (148-150);
Texture : APHYRIC,FINE-GRAINED,VOLCANIC FRAGMENTS & CALCITE
ARE FOUND BETWEEN GLASSY MARGINS(PCES 1E+3E-3F);
Structure : PILLOW BASALT & FLOWS,SECTION SHOT THROUGH WITH
1-5MM CALCITE & GREENISH-BLACK UNIDENT.MINS(POSSIBLY
SMEC OR CHLOR) FILL VEINS,PCE 3M HAS TWO EMPTY VOIDS
& SOME SMALLER CALCITE-FILLED VOID;
Alteration : MOD
ALTERED ZONES FOUND BETWEEN GLASSY MARGINS;
Comments : CONTINUATION OF UNIT 4,MEDIUM-GRAY BASALT,PCE 3I HAS
BRECCIATED CALCITE VEIN;
Vesicles :
Location: Filling: CALCITE,PYR
LARGE VESICLES FILLED WITH CALCITE,PYR NOTICED IN
SOME VESICLES;
Groundmass : OLIVINE
BLACK & VISIBLE TO NAKED EYE;
Replacement: CALCITE
IN VESICLES & VEINS & VOIDS;
UNIDENTIFIED
GREENISH-BLACK UNIDENT.MINS FILL VEINS(POSSIBLY
SMEC OR CHLOR);
NOTICED IN SOME VESICLES;
SMECTITE
CHLORITE
ID SMEC & CHLOR UNCERTAIN IN VEINS;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: O'Connell, S.
Hole: 525A Sample Midpoint (m) : 635.10
Core: 59 Top of Core Depth (m) : 630.60
Sect: 3 Top of Section Depth(m): 633.60
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (0-6), 1B (6-13), 1C (14-20), 1D (19-24),
1E (25-30), 1F (30-37), 1G (37-47), 1H (47-53),
1I (53-61), 1J (62-73), 1K (73-80), 1L (80-87),
1M (87-92), 1N (92-98), 1O (98-103), 1P (103-110),
1Q (110-115), 1R (115-118), 1S (118-122),
1T (123-128), 1U (128-136), 1V (136-143),
1W (143-147);
Texture : APHYRIC,FINE-TO-MEDIUM-GRAINED,GLASS OBSERVED IN THE
BRECCIA ZONES & ON SOME OF THE DRILLED CORE SIDES-
MOST OF THE PLACES WHERE GLASSY RIMS WOULD BE
SUSPECTED HAVE BEEN ALTERED;
Structure : PILLOW BASALT & FLOWS,CALCITE VEIN IN PCE 1C,PCES
1S+1T HAVE 10MM CALCITE VEIN,PCE 1F HAS A CLAY.MIN
VEIN;
Alteration : MOD
GLASSY RIMS(?) ALTERED;
Comments : CONTINUATION OF UNIT 4,MEDIUM GRAY BASALT,PCE 1E
BRECCIA,BRECCIA ZONES PRESENT;
Vesicles : Size(mm): TO 70 Percent:
Location: Filling: CALCITE
Shape : THIN,ELONGAT
VERY LARGE(1-5MM ACROSS & TO 70MM LONG) CALCITE-
FILLED VESICLES,SMALL SPARSE(<5%) VESICLES
PRESENT ALSO;
Phenocrysts: PLAGIOCLASE
OLIVINE
VERY SMALL PLAG LATHS & ALTERD GRAINS OF OL MAY
BE SEEN ON SOME SURFACES;
Replacement: CALCITE
IN VEINS & VESICLES;
CLAY MINERALS
IN VEIN IN PCE 1F;
ON PCE 1B;
Leg : 74 Top/Bottom Interval(mm): 0/1450 Analyst: Borella, P.E.
Hole: 525A Sample Midpoint (m) : 636.55
Core: 59 Top of Core Depth (m) : 630.60
Sect: 4 Top of Section Depth(m): 635.10
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (2-9), 1B (9-17), 1C (16-25), 1D (26-29),
1E (25-31), 1F (32-35), 1G (35-41), 1H (41-45),
1I (46-53), 1J (53-55), 1K (56-62), 1L (62-69),
1M (69-74), 1N (74-81), 1O (82-87), 1P (87-91),
1Q (91-96), 1R (97-99), 1S (100-108), 1T (108-111),
1U (112-116), 1V (116-121), 1W (120-129),
1X (128-137), 1Y (138-143);
Texture : APHYRIC,FINE-GRAINED,GLASSY MARGINS AT PCES
1G-1H+1L+1Q;
Structure : PILLOW BASALT & FLOWS,NUMEROUS CALCITE VEINS(LARGEST
IS 3MM),MANY CALCITE-FILLED VOIDS CONNECTED WITH
THIN CALCITE FEEDER(?) VEINS;
Alteration : MOD
Comments : CONTINUATION OF UNIT 4,MEDIUM GRAY BASALT,BASALTIC
BRECCIA(CEMENTED WITH CALCITE) PRESENT;
Vesicles : Size(mm): TO 30 Percent:
Location: Filling: CALCITE
VESICLES ARE LARGE & NOT AS ABUNDANT AS IN
PREVIOUS CORES,VESICLES CONCENTRATED IN ZONES;
Replacement: CALCITE
FILLS VEINS & VESICLES & CEMENTS BRECCIA;
PALAGONITE
ID UNCERTAIN IN PCE 1G;
SMECTITE
ID UNCERTAIN IN PCE 1G;
Leg : 74 Top/Bottom Interval(mm): 0/1450 Analyst: Futterer, D.
Hole: 525A Sample Midpoint (m) : 638.05
Core: 59 Top of Core Depth (m) : 630.60
Sect: 5 Top of Section Depth(m): 636.60
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (0-11), 1B (11-22), 1C (22-25), 1D (26-28),
1E (28-31), 1F (32-38), 1G (39-45), 1H (45-55),
1I (55-59), 1J (60-64), 1K (64-69), 1L (70-75),
1M (75-80), 1N (80-94), 1O (94-102), 1P (102-109),
1Q (109-113), 1R (113-116), 1S (116-121),
1T (121-125), 1U (125-131), 1V (130-137),
1W (137-145);
Texture : APHYRIC,FINE-TO-MEDIUM-GRAINED,GLASS RIM ON PCE 1V;
Structure : PILLOW BASALT & FLOWS,CALCITE VEIN IN PCE 1V;
Alteration : MOD
Comments : CONTINUATION OF UNIT 4,MEDIUM GRAY BASALT;
Vesicles : Size(mm): Percent: <5
Location: Filling:
Shape : ROUND,ELONGA
ROUNDED & ELONGATE VESICLES;
Replacement: CALCITE
IN VEIN IN PCE 1V;
Leg : 74 Top/Bottom Interval(mm): 0/ 550 Analyst: Borella, P.E.
Hole: 525A Sample Midpoint (m) : 638.65
Core: 59 Top of Core Depth (m) : 630.60
Sect: 6 Top of Section Depth(m): 638.10
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (3-5), 1B (6-9), 1C (10-20), 1D (20-25),
1E (26-32), 1F (32-37), 1G (38-44), 1H (44-51);
Texture : APHYRIC,FINE-GRAINED,GLASS ON PCE 1B;
Structure : PILLOW BASALT & FLOWS,CALCITE VEINS;
Alteration : MOD
ALTERATION RIND ON PCE 1H;
Comments : CONTINUATION OF UNIT 4,MEDIUM GRAY BASALT;
Vesicles : VESICLES CONCENTRATED IN CERTAIN AREAS(FOR EXAMPLE
PCE 1C) OR ARE CONNECTED WITH SMALL VEINS,CALCITE-
FILLED VUGS PRESENT;
Phenocrysts: PLAGIOCLASE
SMALL PLAG PHENOS;
Replacement: CALCITE
IN VEINS & VESICLES & VUGS;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Lever, A.
Hole: 525A Sample Midpoint (m) : 641.60
Core: 60 Top of Core Depth (m) : 640.10
Sect: 1 Top of Section Depth(m): 640.10
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (2-10), 1B (9-15), 1C (15-30), 1D (30-70),
1E (70-74), 1F (75-80), 1G (80-86), 1H (86-104),
1I (104-112), 2 (114-118), 3A (119-125),
3B (126-130), 3C (130-134), 4 (136-140),
5A (140-145), 5B (146-149);
Texture : APHYRIC,FINE-TO-MEDIUM-GRAINED,BLACK(N1) GLASSY
MARGIN ON UPPER SIDE OF PCES 1A+5A,PCE 1E IS A VERY
FINE-GRAINED CHILLED MARGIN;
Structure : PILLOW BASALT & FLOWS,WHITE(N9) CALCITE VEINS
THROUGHOUT(1-3MM WIDE IN PCES 5A+5B);
Alteration : MOD
Comments : CONTINUATION OF UNIT 4,PCES 1A-3C MEDIUM(N5) TO
MEDIUM-DARK GRAY(N4),PCE 4A 5B7/1,PCES 5A-5B MEDIUM
LIGHT-GRAY(N6) WITH GREENISH-BLACK(5GY2/1) & MEDIUM
BLUISH-GRAY(5B5/1) SECTION ON PCE 5A;
Vesicles : Size(mm): Percent: RARE
Location: Filling: CALCITE
RARE VESICLES IN PCES 1A-3C;
Size(mm): TO 10 Percent: <3
Location: Filling: CALCITE
RARE VESICLES ALL FILLED WITH CALCITE,PCE 1B HAS
ONE LARGE VESILCE(10X30MM);
Replacement: CALCITE
FILLS VEINS & VESICLES;
Leg : 74 Top/Bottom Interval(mm): 0/1450 Analyst: Duee, G.
Hole: 525A Sample Midpoint (m) : 643.05
Core: 60 Top of Core Depth (m) : 640.10
Sect: 2 Top of Section Depth(m): 641.60
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (0-7), 1B (7-12), 1C (13), 1D (13-19),
1E (19-25), 1F (25-27), 2A (28), 2B (29),
2C (30-34), 2D (34-39), 2E (40-44), 2F (43-45),
2G (45-47), 2H (48-50), 2I (51-55), 3A (57),
3B (58), 3C (60-63), 3D (63-65), 3E (65-68),
3F (68-70), 4A (73-75), 4B (75-79), 4C (79-82),
4D (82-85), 4E (86-91), 4F (91-95), 4G (95-100),
4H (100-103), 4I (103-105), 4J (105-111),
4K (111-117), 4L (117-123), 4M (123-125),
4N (125-130), 4O (130-135), 4P (135-141);
Texture : APHYRIC,PCE 1F VERY FINE-GRAINED & ALTERED CHILLED
MARGIN;
Structure : PILLOW BASALT & FLOWS;
Alteration : EXT
PCES 1A-1E+2I;
Comments : CONTINUATION OF UNIT 4,PCES 1A-1E LIGHT GREENISH-
GRAY(5G8/4) BASALTIC BRECCIA WITH DARK GREENISH-GRAY
FRAGMENTS(5G4/1),PCES 1F-2H MEDIUM-DARK GRAY(N4),
PCES 4A-4F MEDIUM-TO-DARK-GRAY GRAY(N5-N4) BASALT;
Vesicles : Size(mm): 2-8 Percent:
Location: Filling: CALCITE
CALCITE-FILLED VESICLES INCREASE IN SIZE DOWN CORE
FROM 2-3MM TO 5-8MM;
Replacement: CALCITE
LARGE SPARSE PATCHES OF CALCITE IN PCES 2A-2H,
FILLS VESICLES;
Leg : 74 Top/Bottom Interval(mm): 0/1450 Analyst: Richardson, S.H.
Hole: 525A Sample Midpoint (m) : 644.55
Core: 60 Top of Core Depth (m) : 640.10
Sect: 3 Top of Section Depth(m): 643.10
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
MASSIVE BASALT;
Piece No. : PCES 1A (2-5), 1B (5-8), 1C (8-13), 1D (12-20),
1E (19-28), 1F (28-35), 1G (35-38), 1H (38-45),
1I (45-51), 1J (52-57), 1K (58-61), 1L (60-64),
1M (65-71), 1N (72-78), 1O (78-83), 1P (84-90),
1Q (90-100), 1R (100-107), 1S (107-112),
1T (110-115), 1U (114-116), 1V (117-123),
1W (122-140), 1X (138-143);
Texture : APHYRIC,FINE-TO-MEDIUM-GRAINED;
Structure : MASSIVE PILLOW BASALT & FLOWS,CALCITE VEINS IN PCES
1P-1Q+1W-1X & OTHER VEINS ARE FILLED WITH MINOR PYR
& CARB.UNSPEC;
Alteration : MOD
Comments : CONTINUATION OF UNIT 4,BASALT IS MEDIUM-TO-DARK
GRAY;
Vesicles : Size(mm): Percent: 20
Location: Filling: CARB.UNSPEC,PYR
VESICLES FILLED WITH CARB.UNSPEC & MINOR PYR;
Replacement: CALCITE
IN VEINS IN PCES 1P-1Q+1W-1X;
CARBONATE
CARB.UNSPEC FILLS VESICLES & VEINS;
MINOR PYR FOUND IN VESICLES & VEINS;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Richardson, S.H.
Hole: 525A Sample Midpoint (m) : 646.10
Core: 60 Top of Core Depth (m) : 640.10
Sect: 4 Top of Section Depth(m): 644.60
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
MASSIVE BASALT;
Piece No. : PCES 1A (1-8), 1B (7-20), 1C (20-27), 1D (27-41),
1E (40-46), 1F (46-58), 1G (59-80), 1H (82-121),
1I (120-150);
Texture : APHYRIC,FINE-TO-MEDIUM-GRAINED;
Structure : MASSIVE PILLOW BASALT & FLOWS,CALCITE VEINS &
STRINGERS THROUGHOUT WITH MINOR PYR ON MARGINS OF
VEINS;
Alteration : MOD
Comments : CONTINUATION OF UNIT 4,MEDIUM-TO-DARK-GRAY BASALT;
Vesicles : Size(mm): Percent: 0
Replacement: CALCITE
VEINS & STRINGERS;
MINOR PYR IN MARGINS OF VEINS;
Leg : 74 Top/Bottom Interval(mm): 0/ 650 Analyst: Richardson, S.H.
Hole: 525A Sample Midpoint (m) : 646.75
Core: 60 Top of Core Depth (m) : 640.10
Sect: 5 Top of Section Depth(m): 646.10
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (2-4), 1B (3-10), 1C (10-17), 1D (17-21),
2 (23-33), 3A (35-42), 3B (40-48), 3C (48-50),
4A (53-57), 4B (57-61), 4C (61-64);
Texture : APHYRIC,VERY FINE-GRAINED,PCES 2-3B HAVE ALTERED
GLASSY MARGINS;
Structure : PILLOW BASALT & FLOWS,CARB.UNSPEC-FILLED VOIDS &
STRINGERS,HALF OF PCE 3A IS A SOLID 3X4CM PCE OF
CALCITE;
Alteration : MOD
PCES 1A-3C,PCES 2-3B HAVE ALTERED GLASSY MARGINS;
EXT
PCES 4A-4C ARE TOTALLY REPLACED BY PALE-GREEN
CLAYEY CHERT(?);
Comments : PCE 4C ENDS UNIT 4,BASALT IS GRAY,PCES 4A-4C PALE
GREEN;
Vesicles : VERY FEW VESICLES;
Replacement: CALCITE
HALF OF PCE 3A IS A SOLID 3X4CM PCE OF CALCITE;
CARBONATE
CARB.UNSPEC FILLS VOIDS & STRINGERS;
CHERT
CLAYEY CHERT(?) REPLACES PCES 4A-4C;
Leg : 74 Top/Bottom Interval(mm): 650/1500 Analyst: Richardson, S.H.
Hole: 525A Sample Midpoint (m) : 647.60
Core: 60 Top of Core Depth (m) : 640.10
Sect: 5 Top of Section Depth(m): 646.75
LITHOLOGY: SEDIMENT;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Richardson, S.H.
Hole: 525A Sample Midpoint (m) : 651.10
Core: 61 Top of Core Depth (m) : 649.60
Sect: 1 Top of Section Depth(m): 649.60
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (2-4), 1B (4-8), 1C (8-10), 1D (9-12),
1E (13-17), 1F (17-20), 2A (21-24), 2B (25-27),
2C (28-36), 3A (38-41), 3B (42-44), 3C (45-47),
3D (48-50), 4A (52-55), 4B (55-56), 4C (57-58),
4D (59-61), 4E (62-70), 4F (70-73), 4G (73-76),
4H (76-78), 5A (80-82), 5B (82-85), 5C (85-88),
5D (88-91), 5E (92-94), 5F (95-109), 6 (110-118),
7A (119-122), 7B (123-127), 8A (129-134),
8B (134-137), 8C (137-143), 8D (143-145),
8E (146-148);
Texture : APHYRIC,GLASSY TO FINE-GRAINED,PCES 1A-4H GLASSY
BASALT ESPECIALLY PCES 1F+4A+4G-4H,PCES 5A-8E FINE-
GRAINED;
Structure : PILLOW BASALT & FLOWS;
Alteration : MOD TO EXT
PCES 1A-4H,PCES 1A-1C+4A-4E CONSIST OF 50% PALE TO
DARK GREEN CLAY/PALAG MATRIX OCCUPYING VOID(PCE 4F
CONSISTS ENTIRELY OF THIS MATERIAL);
Comments : PCE 1A BEGINS UNIT 5,BASALT IS DARK GRAY TO BLACK;
Vesicles : Size(mm): Percent: 5-20
Location: Filling: CLAY,CARB
VESICLES FILLED WITH BLACK CLAY.MIN,PCES 5A-8E
HAVE VESICLES FILLED WITH BLACK CLAY.MIN &
CARB.UNSPEC;
Replacement: CLAY MINERALS
BLACK CLAY.MIN FILLS VESICLES;
CARBONATE
CARB.UNSPEC FILLS VESICLES;
CLAY MINERALS
GREEN CLAY.MIN MAKES UP 50% OF MATRIX OF PCES
1A-1C+4A-4E WITH PCE 4F ENTIRELY COMPOSED OF THIS
MATERIAL;
Leg : 74 Top/Bottom Interval(mm): 0/1350 Analyst: Richardson, S.H.
Hole: 525A Sample Midpoint (m) : 652.45
Core: 61 Top of Core Depth (m) : 649.60
Sect: 2 Top of Section Depth(m): 651.10
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (0-8), 1B (8-11), 2 (12-17), 3A (20-28),
3B (28-36), 3C (36-38), 3D (38-43), 4A (45-52),
4B (52-56), 4C (54-57), 4D (57-61), 4E (58-63),
4F (62-66), 4G (65-69), 4H (68-71), 4I (71-79),
5A (80-87), 5B (88-92), 5C (92-98), 5D (98-104),
5E (105-114), 5F (114-117), 6A (120-123),
6B (123-126), 6C (127-133);
Texture : APHYRIC,FINE-GRAINED;
Structure : PILLOW BASALT & FLOWS;
Alteration : MOD
Comments : CONTINUATION OF UNIT 5,DARK GRAY BASALT;
Vesicles : Size(mm): Percent: 10-20
Location: Filling: CLAY,CARB
SOME VESICLES EMPTY & SOME ARE FILLED WITH BLACK
CLAY.MIN WITH MAJORITY FILLED WITH CARB.UNSPEC;
Phenocrysts: PLAGIOCLASE
Replacement: CLAY MINERALS
BLACK CLAY.MIN FILLS SOME VESICLES;
CARBONATE
CARB.UNSPEC FILLS MAJORITY OF VESICLES;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Richardson, S.H.
Hole: 525A Sample Midpoint (m) : 660.60
Core: 62 Top of Core Depth (m) : 659.10
Sect: 1 Top of Section Depth(m): 659.10
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (2-8), 1B (8-10), 1C (11-16), 1D (17-22),
1E (23-26), 1F (26-28), 2 (30-45), 3A (47-51),
3B (51-57), 3C (58-64), 3D (64-68), 3E (69-71),
3F (71-77), 3G (77-81), 3H (82-88), 3I (88-92),
3J (94-95), 3K (96-99), 3L (99-102), 3M (103-104),
3N (105-106), 4A (108-110), 4B (111-115),
4C (115-121), 4D (122-129), 4E (130-133),
4F (135-150);
Texture : APHYRIC,FINE-GRAINED,PCES 1B-1D+3A ARE GLASSY
BASALTS;
Structure : PILLOW BASALT & FLOWS,SEVERAL CALCITE VEINS TO A FEW
MM THICK;
Alteration : MOD
Comments : CONTINUATION OF UNIT 5,DARK GRAY BASALT,PCES 2+4F
MADE UP OF SEVERAL FRAGMENTS;
Vesicles : Size(mm): Percent: 10-20
Location: Filling: CLAY,CARB
VESICLES FILLED WITH BLACK CLAY.MIN & CARB.UNSPEC;
Phenocrysts: PLAGIOCLASE
Replacement: CLAY MINERALS
BLACK CLAY.MIN FILLS VESICLES;
CARBONATE
CARB.UNSPEC FILLS VESICLES;
Leg : 74 Top/Bottom Interval(mm): 0/ 800 Analyst: Richardson, S.H.
Hole: 525A Sample Midpoint (m) : 661.40
Core: 62 Top of Core Depth (m) : 659.10
Sect: 2 Top of Section Depth(m): 660.60
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (2-5), 1B (5-7), 1C (7-12), 2A (14-18),
2B (18-24), 2C (24-29), 3 (31-40), 4A (41-48),
4B (48-59), 4C (58-66), 4D (66-76), 4E (76-80);
Texture : APHYRIC,FINE-GRAINED;
Structure : PILLOW BASALT & FLOWS;
Alteration : MOD
PCES 4A-4E MAKE UP FRESHEST PART OF SECTION;
Comments : CONTINUATION OF UNIT 5,DARK GRAY BASALT,PCES 1C+3
MADE UP OF SEVERAL FRAGMENTS;
Vesicles : Size(mm): Percent: 1-5
Location: Filling: CARB.UNSPEC
VESICLES 1-5% IN PCES 1A-2C(EITHER EMPTY OR FILLED
WITH CARB.UNSPEC);
Size(mm): Percent: 0
PCES 4A-4E;
Phenocrysts: PLAGIOCLASE
Replacement: CARBONATE
CARB.UNSPEC FILLS SOME VESICLES;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Richardson, S.H.
Hole: 525A Sample Midpoint (m) : 670.10
Core: 63 Top of Core Depth (m) : 668.60
Sect: 1 Top of Section Depth(m): 668.60
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
MASSIVE BASALT;
Piece No. : PCES 1A (2-12), 1B (12-15), 2A (17-26), 2B (25-33),
2C (33-41), 2D (41-49), 2E (48-52), 2F (53-57),
2G (57-65), 3A (67-73), 3B (73-77), 4A (79-86),
4B (87-95), 4C (96-104), 5A (105-110), 5B (111-114),
5C (115-117), 6A (118-123), 6B (125-130),
6C (130-139), 6D (140-149);
Texture : APHYRIC,FINE-TO-MEDIUM-GRAINED;
Structure : MASSIVE PILLOW BASALT & FLOWS,ODD MINOR CALCITE
STRINGERS ON PCE BOUNDARIES;
Alteration : SLIGHTLY TO MOD
Comments : CONTINUATION OF UNIT 5,DARK GRAY BASALT;
Vesicles : Size(mm): Percent: <1
VERY SMALL VESICLES;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 5
SCATTERED PLAG PHENOS;
Replacement: CALCITE
STRINGERS ON PCE BOUNDARIES;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Richardson, S.H.
Hole: 525A Sample Midpoint (m) : 671.60
Core: 63 Top of Core Depth (m) : 668.60
Sect: 2 Top of Section Depth(m): 670.10
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (1-6), 1B (7-13), 1C (13-25), 1D (25-30),
1E (27-32), 1F (32-38), 1G (38-40), 2A (42-49),
2B (49-54), 2C (52-60), 2D (59-71), 2E (69-80),
2F (79-88), 2G (88-91), 3 (93-97), 4A (98-111),
4B (111-124), 4C (124-133), 4D (134-141),
4E (141-145), 5 (146-150);
Texture : APHYRIC,FINE-TO-MEDIUM-GRAINED;
Structure : CALCITE VEIN ON SIDE OF PCE 1C & FEW OTHER VERY THIN
CALCITE STRINGERS;
Alteration : FRESH
LOCALLY SLIGHTLY ALTERED IN PCES 1F-1G+2D-2E+3+5;
Comments : PCE 5 ENDS UNIT 5 & CORE,DARK GRAY BASALT;
Vesicles : Size(mm): Percent: <1
SMALL VESICLES;
Replacement: CALCITE
VEINS & STRINGERS;
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