Leg : 43 Top/Bottom Interval(mm): 0/1420 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 283.32
Core: 16 Top of Core Depth (m) : 278.90
Sect: 3 Top of Section Depth(m): 281.90
LITHOLOGY: SEDIMENT;
Leg : 43 Top/Bottom Interval(mm): 1420/1450 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 283.35
Core: 16 Top of Core Depth (m) : 278.90
Sect: 3 Top of Section Depth(m): 283.32
LITHOLOGY: ALTERED BASALT FRAGMENTS;
Comments : MIXTURE OF 2.5GY6/4 (LIGHT YELLOWISH BROWN) AND
5GY8/1 (LIGHT GREENISH GRAY) SILT,SOME SAND,STAINING
OF 10R4/6 (RED) 0.5CM DIAMETER VERY ALTERED BASALT
FRAGMENTS - EXTREMELY POORLY SORTED;
Leg : 43 Top/Bottom Interval(mm): 1450/1470 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 283.37
Core: 16 Top of Core Depth (m) : 278.90
Sect: 3 Top of Section Depth(m): 283.35
LITHOLOGY: SEDIMENT;
Leg : 43 Top/Bottom Interval(mm): 1470/1500 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 283.40
Core: 16 Top of Core Depth (m) : 278.90
Sect: 3 Top of Section Depth(m): 283.37
LITHOLOGY: BASALT;
Texture : VERY FINE-APHANITIC;
Structure : FRACTURES;
Comments : 5YR3/2 (GRAYISH BROWN) WITH N2 (GRAYISH BLACK
DISCOLORATIONS ALONG FRACTURES;
Vesicles : VESICLE LINEATIONS IN THE HORIZONTAL;
Leg : 43 Top/Bottom Interval(mm): 0/ 110 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 283.51
Core: 16 Top of Core Depth (m) : 278.90
Sect: CC Top of Section Depth(m): 283.50
LITHOLOGY: BASALT;
Piece No. : PCE 1 (0-7), 2 (7-11);
Texture : VERY FINE-APHANITIC;
Structure : FRACTURES;
Comments : 5YR3/2 (GRAYISH BROWN) WITH N2 (GRAYISH BLACK
DISCOLORATIONS ALONG FRACTURES;
Vesicles : VESICLE LINEATIONS ALONG HORIZONTAL;
Leg : 43 Top/Bottom Interval(mm): 110/ 140 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 283.54
Core: 16 Top of Core Depth (m) : 278.90
Sect: CC Top of Section Depth(m): 283.51
LITHOLOGY: BASALT;
Piece No. : PCE 3 (11-14);
Texture : APHANITIC;
Alteration : ALTERED;
Comments : 2.5YR5/2 (WEAK RED);
Phenocrysts: HORNBLENDE
Size(mm): 0.1
Leg : 43 Top/Bottom Interval(mm): 0/ 200 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 298.10
Core: 18 Top of Core Depth (m) : 297.90
Sect: CC Top of Section Depth(m): 298.00
LITHOLOGY: BASALT;
Comments : 5 FRAGMENTS OF APHANITIC FLOW-LINEATED BASALT AS IN
CORE 16-CC,10YR2/2 (DUSKY YELLOWISH BROWN);
Leg : 43 Top/Bottom Interval(mm): 0/ 200 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 298.10
Core: 18 Top of Core Depth (m) : 297.90
Sect: CC Top of Section Depth(m): 298.00
LITHOLOGY: VOLCANICLASTIC BRECCIA;
Texture : 33 SUBROUNDED FRAGMENTS OF BRECCIA CONTAINING
LAPILLI OF BROWN TO RED ALTERED BASALT WITH
SUBANGULAR OUTLINE-CEMENTED WITH CALCITE;
Alteration : EXTREMELY ALTERED;
Leg : 43 Top/Bottom Interval(mm): 1240/1500 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 308.90
Core: 19 Top of Core Depth (m) : 307.40
Sect: 1 Top of Section Depth(m): 308.64
LITHOLOGY: SEDIMENT;
CONTAINS ABUNDANT GRANULES OF VERY ALTERED BASALT UP
TO 1MM;
Leg : 43 Top/Bottom Interval(mm): 0/ 80 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 308.98
Core: 19 Top of Core Depth (m) : 307.40
Sect: CC Top of Section Depth(m): 309.00
LITHOLOGY: GRANULE SAND;
CONTAINS FRAGMENTS OF VERY ALTERED BASALT ABOUT 0.1
CM;
Comments : 7.5YR4/4 (DARK BROWN),COMPOSITION LIKE 19-1 BUT LESS
CLAY;
Leg : 43 Top/Bottom Interval(mm): 80/ 140 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 309.04
Core: 19 Top of Core Depth (m) : 307.40
Sect: CC Top of Section Depth(m): 308.98
LITHOLOGY: ALTERED BASALT;
CONTAINS 3 FRAGMENTS OF ALTERED BASALT;
Alteration : ALTERED;
Comments : WEAK RED (2.5YR5/2) COLOR;
Leg : 43 Top/Bottom Interval(mm): 810/1500 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 337.50
Core: 20 Top of Core Depth (m) : 336.00
Sect: 1 Top of Section Depth(m): 336.81
LITHOLOGY: BASALT GRANULES;
DOMINANT LITHOLOGY IS SILTY SAND;
Comments : 7.5YR4/4 (DARK BROWN), COMMON, TO 1CM IN DIAMETER;
Alteration : WEATHERED;
Leg : 43 Top/Bottom Interval(mm): 0/ 320 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 337.82
Core: 20 Top of Core Depth (m) : 336.00
Sect: 2 Top of Section Depth(m): 337.50
LITHOLOGY: BASALT GRANULES;
DOMINANT LITHOLOGY IS SILTY SAND;
Texture : AT 20-23 CM 3X3X3 CM SUBROUNDED BASALT CLAST WITH
ABUNDANT HORNBLENDE PHENOCRYSTS, AT 23-25 CM
2X2X2 CM SUBANGULAR DARK FINE-GRAINED BASALT CLAST
WITH 0.5 CM VESICLE FILLINGS OF CALCITE;
Alteration : WEATHERED BASALT GRANULES;
Leg : 43 Top/Bottom Interval(mm): 320/1440 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 338.94
Core: 20 Top of Core Depth (m) : 336.00
Sect: 2 Top of Section Depth(m): 337.82
LITHOLOGY: VOLCANICLASTIC BRECCIA;
Piece No. : PCE NO PIECE NUMBER (32-34), 1 (34-42), 2 (42-47),
3 (47-54), 4 (54-61), 5 (61-69), 6 (69-80),
7 (80-91), 8 (91-104), 9 (104-112), 10 (112-118),
11 (118-124), 12 (124-134), 13 (134-141),
14 (141-144);
Texture : 2X2X2CM FRAGMENT AT 32-34CM,3X4X6CM AT 32-34CM,
PCE 1 IS 5.5X8CM N3 CLAST WITH SLIGHT RIM OF BRECCIA
WITH LAPILLI-SIZE RED BROWN CLASTS, IN PCE 2
SUBANGULAR TO SUBROUNDED CLASTS IN CALCITE MATRIX,
IN PCE 3 ONE 3.3CM, PCE 5+6+7 CONTAIN A 17CM LONG
CLAST,PCE 8 IS A 5CM CLAST,PCES 9-12 COMPRISE A
12CM N3 CLAST, PCE 14 IS A 2CM THICK N3 CLAST,LARGE
AMOUNTS OF CALCITE CEMENT THROUGHOUT CORE 20-2;
Structure : NO GRADING, VERY POOR SORTING,FROM 32-34CM CLASTS
POORLY SORTED VARYING FROM SAND TO 1.7CM;
Alteration : MIXTURE OF ALTERATION STATES FROM 32-34CM EXTENT
OF ALTERATION VARIES FROM 10R4/6 (MODERATE REDDISH
BROWN) TO N3 (DARK GRAY) -OXIDIZED TO RELATIVELY
FRESH,PCE 3 CONTAINS 1CM 10R4/6 ALTERATION RIM
WITH MN LAYER-ALTERATION APPEARS TO DESTROY MOST
MEGASCOPIC TRACE OF VESICLES,BASE OF PCE 5 RIMMED
BY A 1CM THICK 10R3/4 (DARK REDDISH BROWN) HALO -
PART OF MN LAYER,ON PCE 14 DARK YELLOWISH BROWN
(10YR4/2) WEATHERING RIM 1CM THICK;
Comments : AT 32-34CM N3 (DARK GRAY) FRAGMENTS,PCE 5 IS 10YR2/2
(DUSKY YELLOWISH BROWN);
Replacement: CALCITE
CHLORITE
MANGANESE
Phenocrysts: HORNBLENDE
N1 (BLACK),NEAR BOTTOM OF PCE 5;
Vesicles : Size(mm): Percent: 20
VESICULAR, MOST CLASTS FROM 32-24CM 20% VESICULAR-
FILLED BY CALCITE,5% VESICLES -3% OF WHICH ARE
FILLED BY CALCITE IN PCE 1,VESICULARITY VARIABLE
IN PCE 2, PCE 3 IS VESICULAR CLAST (N3)
CONTAINING 1CM VUG WITH CALCITE XTLS AND ONE CM
10R4/6 ALTERATION RIM WITH MN LAYER-ALTERATION
APPEAR TO DESTROY MOST MEGASCOPIC TRACE OF
VESICLES,PCE 5-7 ARE 45% VESICULAR MOST BUT NOT
ALL FILLED WITH CALCITE,PCE 8(AT 101CM) 0.2CM
VESICLE IN 5CM CLAST-CHLORITE AMYGDULES,FROM 104-
134CM N3 CLAST IS 35% AMYGDULES PARTLY FILLED;
Leg : 43 Top/Bottom Interval(mm): 0/ 110 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 339.11
Core: 20 Top of Core Depth (m) : 336.00
Sect: CC Top of Section Depth(m): 339.10
LITHOLOGY: VOLCANICLASTIC BRECIA;
Piece No. : PCE 1 (0-11);
Alteration : MOST CLASTS ALTERED TO 7.5YR3/2 (DARK BROWN);
Vesicles : Size(mm): Percent: 50
Location: Filling: CALCITE
CALCITE CEMENT VOLUMETRICALLY LARGE;
Leg : 43 Top/Bottom Interval(mm): 110/ 200 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 339.20
Core: 20 Top of Core Depth (m) : 336.00
Sect: CC Top of Section Depth(m): 339.11
LITHOLOGY: VOLCANICLASTIC BRECCIA;
Piece No. : PCE 2 (11-15), 3 (15-20);
Texture : PCE 2 IS LARGE CLAST CONTINUOUS WITH PCE 3,PCE 3 IS
7.5CM CLAST;
Alteration : PCE 3 IS LEAST ALTERED AND HAS GREATEST
VESICULARITY;
Vesicles : Size(mm): Percent: 50-60
Location: Filling: CALCITE
PCE 2 IS 10-15% VESICULES FILLED 60/40 WITH
CHLORITE AND CALCITE, PCE 3 VESICLES INCREASE TO
50-60% ALL FILLED WITH CALCITE;
Replacement: CALCITE
CHLORITE
Comments : PCE 2 IS LARGE CLAST OF 10YR3/1 VERY DARK GRAY
BASALT, PCE 3 IS 7.5CM CLAST;
Leg : 43 Top/Bottom Interval(mm): 0/ 50 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 345.55
Core: 21 Top of Core Depth (m) : 345.50
Sect: CC Top of Section Depth(m): 345.60
LITHOLOGY: VOLCANICLASTIC BRECCIA;
Piece No. : PCE 1 (0-5);
Texture : 5X5X2CM FRAGMENT, SUBANGULAR CLASTS, LESS CALCITE
CEMENT BETWEN CLASTS THAN IN CORE 20-2, CLASTS
AVERAGE 1CM, LARGEST IS 2.5CM;
Alteration : EXTENSIVELY ALTERED;
Vesicles : VESICULARITY APPEARS LESS DUE TO GREATER
ALTERATION;
Structure : POOR SORTING;
Comments : MOST CLASTS 1043/4 (DARK REDDISH BROWN),TWO CLASTS
ARE N3 (DARK GRAY);
Replacement: CALCITE
LESS CALCITE CEMENT BETWEEN CLASTS THAN IN CORE
20-2;
Leg : 43 Top/Bottom Interval(mm): 0/ 50 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 355.05
Core: 22 Top of Core Depth (m) : 355.00
Sect: CC Top of Section Depth(m): 355.10
LITHOLOGY: SEDIMENT;
3.3.1CM 5YR5/4 (REDDISH BROWN) WITH MN DENDRITES;
Leg : 43 Top/Bottom Interval(mm): 0/ 50 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 355.05
Core: 22 Top of Core Depth (m) : 355.00
Sect: CC Top of Section Depth(m): 355.10
LITHOLOGY: BASALT;
Texture : 1X3X2CM FRAGMENT,ANGULAR,FINE-GRAINED;
Comments : 10YR3/1 (VERY DARK GRAY);
Vesicles : Size(mm): Percent: 3
Location: Filling: EMPTY
Leg : 43 Top/Bottom Interval(mm): 520/1500 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 375.50
Core: 23 Top of Core Depth (m) : 374.00
Sect: 1 Top of Section Depth(m): 374.52
LITHOLOGY: VOLCANICLASTIC BRECCIA;
Piece No. : PCE NO PCE NUMBERS GIVEN (52-76), 1 (76-88),
2 (88-92), 3 (92-98), 4 (98-102), 5 (102-106),
6 (106-117), 7 (117-121), 8 (121-124),
9 (124-129), 10 (129-134), 11 (134-139),
12 (139-145), 13 (145-150);
Texture : 15 FRAGMENTS FROM 52-76, PCE 2 IS LARGE SINGLE CLAST
OF BASALT 7.5YR3/0 (VERY DARK GRAY) INTERIOR -
7.5YR2.5/0 (BLACK) ELLIPSOIDAL FINER-GRAINED RIM AND
1CM THICK 2.5YR3/4 (DARK REDDISH BROWN) RIM ON ONE
END, PCES 3+4+5 HAVE 7.5YR3/0 INTERIOR -
7.5YR2.5/0 RIM,PCES 10-13 APPARENTLY PARTS OF SAME
CLAST 7.5YR4/2 (DARK BROWN);
Alteration : DARK ALTERATION RIMS OF 5YR2.5/2 (DARK REDDISH
BROWN) AROUND FRAGMENTS OF 128-150CM;
Structure : VERY MINOR CALCITE VEINING FROM 128-150CM;
Vesicles : IN PCE 2 VESICLES LINEATED PARALLEL TO DARK
REDDISH BROWN RIM - VESICLES PARTLY CALCITE
FILLED;
Size(mm): Percent: 7-8
Location: Filling: CALCITE
INTERVAL 128-150 - PARTLY FILLED BY CALCITE;
Size(mm): 0.8 Percent:
Location: Filling: CALCITE
Shape : COMPLEX
INTERVAL 92-106CM,MOSTLY FILLED WITH CALCITE,
SOME SMALL CLASTIC DEBRIS INTERCALATED WITHIN
CALCIC INFILLING;
Size(mm): Percent: 50-55
Location: Filling: CALCITE
PARTLY CALCITE FILLED,INTERVAL 106-111CM;
Phenocrysts: HORNBLENDE
BLACK,INTERVAL 128-150CM;
PYROXENE
REPLACED BY LIMONITE;
Replacement: LIMONITE
Minerals Replaced: PYX
IN INTERVAL 128-150;
FERROUS MN OXIDE
Minerals Replaced: HBL
CALCITE
Leg : 43 Top/Bottom Interval(mm): 0/1490 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 376.99
Core: 23 Top of Core Depth (m) : 374.00
Sect: 2 Top of Section Depth(m): 375.50
LITHOLOGY: VOLCANICLASTIC BRECCIA;
Piece No. : PCE 1 (0-4), 2 (4-10), 2A (8-10), 3 (10-13),
4 (13-19), 5 (19-27), 6 (27-32), 7 (32-38),
8 (38-42), 9 (42-48), 10 (48-54), 11 (54-60),
12 (60-67), 13 (67-69), 14 (69-75), 15 (75-89),
16 (89-97), 17 (97-100), 18 (100-107), 19 (107-113),
20 (113-118), 21 (118-127), 22 (127-132),
23 (132-140), 24 (140-149);
Texture : SUBROUNDED TO SUBANGULAR,MORE GRAIN-GRAIN CONTACT-
LESS CALCITE CEMENT,MOST CLASTS < 1CM,
GRAINS FROM SINGLE PHENOCRYST XLS (HBL) TO 3X3CM
(USUALLY FOR FRESHER CLASTS);
Structure : VERY POORLY SORTED,AT 97-100 CM CLAST CONCENTRICALLY
BANDED AS PILLOW;
Alteration : MAJORITY OF CLASTS ALTERED AND OXIDIZED TO
2.5YR3/4 (DARK REDDISH BROWN), FRESHER CLASTS
OF 10YR3/2 (VERY DARK GRAYISH BROWN) CONTINUE;
Vesicles : Size(mm): Percent: 40-50
Location: Filling: CALCITE
VESICLES PARTLY FILLED BY CALCITE, VESICULARITY
COMMONLY APPEARS LESS BECAUSE OF ALTERATION,
AT 107-113CM 3X3 CM SUBROUNDED CLAST 10YR3/2
40% VESICULAR- 25% FILLED BY CALCITE;
Phenocrysts: HORNBLENDE
Replacement: CALCITE
Leg : 43 Top/Bottom Interval(mm): 0/1500 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 378.50
Core: 23 Top of Core Depth (m) : 374.00
Sect: 3 Top of Section Depth(m): 377.00
LITHOLOGY: VOLCANICLASTIC BRECCIA;
Piece No. : PCE 1 (0-4), 3 (4-15), 3 (15-19), 4 (19-23),
5 (23-29), 6 (29-34), 7 (34-42), 8 (42-47),
9 (47-50), 10 (50-55), 11 (55-62), 12 (62-69),
13 (69-72), 14 (72-76), 15 (76-79), 16 (79-83),
17 (83-87), 18 (87-94), 19 (94-101), 20 (101-107),
21 (107-114), 22 (114-121), 23 (121-124),
24 (124-129), 25 (129-131), 26 (131-138),
27 (138-142), 28 (142-150);
Texture : SUBROUNDED TO SUBANGULAR BASALT CLASTS-SOME HBL
XTLS UP TO 0.8CM, AT 76 CM AMOUNT CALCITE CEMENT
BEGINS TO INCREASE AGAIN;
Structure : POORLY SORTED,NO GRADING,AT 124-137CM A 13CM CLAST
OF A FLOW LOWER SURFACE OXIDIZED 7.5YR4/4
(DARK BROWN) - INTERVAL 5YR3/0 (VERY DARK GRAY);
Alteration : MOST CLASTS ALTERED AND OXIDIZED TO 3 .5YR 3/4
(DARK REDDISH BROWN), AT 76-79CM 0.75CM THICK
MN OXIDE COATING ON A 1.8X4 CM CLAST - 7.5YR4/4
(DARK BROWN) WITH 0.6CM 3 .5YR3/4 (DARK REDDISH
BROWN) ALTERATION RIM BENEATH MN SIDE;
Vesicles : NOT ALL VESICLES FILLED;
Size(mm): Percent: 10
INTERVAL 76-79 CM, VESICLES FILLED;
Size(mm): Percent: 45-50
Location: Filling: CALCITE,CHLORITE
INTERVAL 124-137CM, VESICLE CONCENTRATION,MOSTLY
CALCITE-FILLED, IN THE 3.2CM BELOW OXIDIZED
SURFACE TO 45-50%-REMAINDER 10-15% VESICULAR
WITH CALCITE AND CHLORITE FILLING;
Phenocrysts: HORNBLENDE
Size(mm): TO 8
Replacement: MANGANESE OXIDE
INTERVAL 76-79CM;
CHLORITE
CALCITE
Leg : 43 Top/Bottom Interval(mm): 0/ 300 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 378.80
Core: 23 Top of Core Depth (m) : 374.00
Sect: CC Top of Section Depth(m): 378.60
LITHOLOGY: VOLCANICLASTIC BRECCIA;
Piece No. : PCE NO PIECE NUMBERS;
Structure : VERY POORLY SORTED;
Texture : CALCITE CEMENT MODERATELY ABUNDANT;
Alteration : EXTENSIVELY ALTERED;
Comments : MOST CLASTS 3.5YR3/6 DARK RED,LIKE 23-1&2&3;
Vesicles :
Location: Filling: CALCITE
NEARLY ALL VESICLES CALCITE FILLED;
Leg : 43 Top/Bottom Interval(mm): 0/1150 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 384.65
Core: 24 Top of Core Depth (m) : 383.50
Sect: 1 Top of Section Depth(m): 383.50
LITHOLOGY: VOLCANICLASTIC BRECCIA;
Piece No. : PCE 1 (0-10), 2 (10-15), 3 (15-20), 4 (20-24),
5 (24-27), 6 (27-30), 7 (30-33), 8 (33-36),
9 (36-43), 10 (46-49), 11 (49-54), 12 (54-56),
13 (56-62), 14 (62-69), 15 (69-72), 16 (72-81),
17 (81-85), 18 (85-92), 19 (92-98), 20 (100-108),
21 (108-115);
Texture : CALCITE CEMENT CONTINUES TO INCREASE DOWNWARD;
Structure : VERY POORLY SORTED AS ABOVE;
Alteration : VERY LITTLE FRESH-LOOKING MATERIAL;
Comments : CLASTS CONTINUE MOSTLY 2.5YR3/4 (DARK REDDISH
BROWN),CLASTS OF 7.5YR 4/4 (DARK BROWN) TO 2.5X6CM;
Vesicles : Size(mm): Percent: 10-15
VESICLE LINEATIONS 10-15%;
Leg : 43 Top/Bottom Interval(mm): 0/ 130 Analyst: Houghton, R.
Hole: 385 Sample Midpoint (m) : 385.13
Core: 24 Top of Core Depth (m) : 383.50
Sect: CC Top of Section Depth(m): 385.10
LITHOLOGY: VOLCANICLASTIC BRECCIA;
LIKE ABOVE BUT CEMENT MINOR;
Piece No. : PCE 1 (0-8), 2 (8-13);
Texture : CALCITE CEMENT MINOR;
Alteration : MOST CLASTS OF BASALT ALTERED TO 2.5YR4/4
(REDDISH BROWN);
Replacement: CALCITE
CALCITE CEMENT MODERATE;
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