Leg : 62 Top/Bottom Interval(mm): 0/ 650 Analyst: Seifert, K.
Hole: 465A Sample Midpoint (m) : 411.65
Core: 40 Top of Core Depth (m) : 409.50
Sect: 2 Top of Section Depth(m): 411.00
LITHOLOGY: SEDIMENTS;
Leg : 62 Top/Bottom Interval(mm): 650/1500 Analyst: Seifert, K.
Hole: 465A Sample Midpoint (m) : 412.50
Core: 40 Top of Core Depth (m) : 409.50
Sect: 2 Top of Section Depth(m): 411.65
LITHOLOGY: VOLCANIC BRECCIA;
Piece No. : PCES 1 (68-72), 2 (75-80), 3 (82-86), 4 (88-92),
5 (94-100), 6A (101-111), 6B (110-112),
7 (115-126), 8A (130-136), 9 (144-150);
Texture : PCES 1-5 ARE FINE-GRAINED WITH VISIBLE PLAG LATHS
UNDER THE BINOCULAR MICROSCOPE, HIGHLY ALTERED,
POSSIBLE TO MARK WITH THE FINGERNAIL, PYRITE AND
CALCITE COATINGS ON BOUNDARIES, IN PCE 4 A VEIN IS
DARK RED TO WHITE AND MAY CONTAIN BARITE IN
ADDITION TO CALCITE AND PYRITE, PCES 6-9 ARE
LARGER AND OBVIOUSLY BRECCIATED, THE VOLCANIC ROCK
IS GENERALLY SLIGHTLY COARSER GRAINED THAN IN PCES
1-5 AND CONTAINS BOTH PLAG AND PYX MICROPHENOS, THIS
VOLCANIC ROCK IS NOT SO BADLY ALTERED, THE VEINS ARE
FILLED WITH CALCITE AND A GREEN MINERAL, THE
VOLCANIC ROCK CONTAINS FAIRLY ABUNDANT SULFIDES
IN PLACES, THE VOLCANIC ROCK PCES ARE ANGULAR TO
SUBROUNDED, ONE EUHEDRAL OL MICROPHENO OUTLINE WAS
NOTED;
Leg : 62 Top/Bottom Interval(mm): 0/ 430 Analyst: Windom, K
Hole: 465A Sample Midpoint (m) : 412.93
Core: 40 Top of Core Depth (m) : 409.50
Sect: 3 Top of Section Depth(m): 412.50
LITHOLOGY: VOLCANIC BRECCIA;
Piece No. : PCE 1A (2-16), 1B (16-26), 1C (26-38);
Texture : CLASTS OF VOLCANIC ROCK CEMENTED BY VEINS OF
CALCITE, THE TEXTURE OF THE INDIVIDUAL CLASTS VARIES
FROM VERY FINE-GRAINED TO MEDIUM-GRAINED, THE
COARSER GRAINED CLASTS CONTAIN PLAG LATHS THAT ARE
VISIBLE UNDER THE BINOCULAR MICROSCOPE, THE CLASTS
RANGE IN COLOR FROM N5 GRAY TO 5B 5/1 MEDIUM BLUISH
GRAY, MANY OF THE CLASTS CONTAIN VEINS OF PYRITE,
OFTEN PYRITE OCCURS AT THE CLAST-CARB INTERFACE,
FLOW LAYERING EXEMPLIFIED BY ALIGNMENT OF PLAG
CRYSTALS IS PRESENT IN SOME CLASTS, A FEW CLASTS
CONTAIN MICROPHENOS OF PLAG, NO HOLOHYALINE CLASTS
WERE SEEN, SOME HIGHLY ALTERED CLASTS WERE FOUND
THAT MAY REPRESENT ALTERED GLASS HOWEVER, NO SIZE
SORTING OF CLASTS WAS OBSERVED, MOST SHOWED A
MODERATE DEGREE OF ROUNDING;
Leg : 62 Top/Bottom Interval(mm): 0/ 150 Analyst: Windom, K
Hole: 465A Sample Midpoint (m) : 419.15
Core: 41 Top of Core Depth (m) : 419.00
Sect: 1 Top of Section Depth(m): 419.00
LITHOLOGY: VOLCANIC BRECCIA;
Piece No. : PCE 1 (0-15);
Texture : RUBBLE OF VOLCANIC BRECCIA, CLASTS OF VARYING
GRAIN SIZES IN A CALCITE MATRIX, A SMEAR SLIDE OF
A LIGHT COLORED (5B 7/1, LIGHT BLUISH GRAY)
CONTAINED DEVITRIFIED GLASS, FELDSPAR CRYSTALS AND
CRYSTAL TENTATIVELY IDENTIFIED AS HYPERSTHENE, THE
CLAST IS PRESUMED TO BE AN ALTERED GLASS FRAGMENT,
NO CRYSTALS ARE LARGE ENOUGH TO BE SEEN EVEN WITH
THE BINOCULAR MICROSCOPE;
Leg : 62 Top/Bottom Interval(mm): 160/ 620 Analyst: Windom, K
Hole: 465A Sample Midpoint (m) : 419.62
Core: 41 Top of Core Depth (m) : 419.00
Sect: 1 Top of Section Depth(m): 419.16
LITHOLOGY: TRACHYTE;
Piece No. : PCE 2 (16-24), 3 (25-40), 4 (40-46), 5 (47-62);
Texture : APHYRIC WITH RARE PLAG MICROPHENOS, VERY FINE-
GRAINED, PATCHES OF ALTERED GLASS ARE COMMON;
Alteration : EXT
THIN COATINGS OF PYRITE WITH OR WITHOUT CALCITE
OCCUR ON SEVERAL PCES;
Comments : COLOR IS A FAIRLY UNIFORM 5B 7/1 LIGHT BLUISH GRAY;
Phenocrysts: PLAGIOCLASE
RARE PLAG MICROPHENOS;
Replacement: PYRITE
CALCITE
Leg : 62 Top/Bottom Interval(mm): 620/ 700 Analyst: Windom, K
Hole: 465A Sample Midpoint (m) : 419.70
Core: 41 Top of Core Depth (m) : 419.00
Sect: 1 Top of Section Depth(m): 419.62
LITHOLOGY: BASALT FRAGMENTS;
PILLOW BASALT;
Piece No. : PCE 6 (62-70);
Texture : PCE 6 CONSISTS OF A RUBBLE OF SMALL PCES OF BASALT,
SOME BRECCIATED;
Structure : SOME CONTAINING CALCITE AND PYRITE VEINS;
Alteration : EXT;
Replacement: CALCITE
PYRITE
Leg : 62 Top/Bottom Interval(mm): 710/ 950 Analyst: Windom, K
Hole: 465A Sample Midpoint (m) : 419.95
Core: 41 Top of Core Depth (m) : 419.00
Sect: 1 Top of Section Depth(m): 419.71
LITHOLOGY: BASALTIC BRECCIA;
Piece No. : PCE 7A (71-80), 7B (80-86), 7C (87-95);
Texture : BRECCIA CONTAINING HIGHLY SINGULAR BASALT FRAGMENTS
IN A MATRIX OF CALCITE, THE BASALT IS BADLY ALTERED,
PLAG CRYSTALS ARE PRESENT AND SOME APPARENTLY FLOW
ALIGNED MAY BE SEEN WITH THE BINOCULAR MICROSCOPE,
DISSEMINATED PYRITE OCCURS IN MANY CLASTS, COLOR
VARIES FROM N5 GRAY TO 5B 5/1 MEDIUM BLUISH GRAY
EXCEPT ONE CLAST WHICH IS ABOUT 5YR8/1 PINKISH GRAY
AND BANDED, SEVERAL PCES SHOW LAYERING, PROBABLY
FLOWAGE INDUCED;
Leg : 62 Top/Bottom Interval(mm): 960/1500 Analyst: Windom, K
Hole: 465A Sample Midpoint (m) : 420.50
Core: 41 Top of Core Depth (m) : 419.00
Sect: 1 Top of Section Depth(m): 419.96
LITHOLOGY: BASALTIC BRECCIA;
SIMILAR TO ABOVE;
Piece No. : PCE 8 (96-105), 9 (106-120), 10 (122-129),
11A (130-136), 11B (136-142), 11C (142-148);
Texture : SIMILAR TO ABOVE EXCEPT THAT BRECCIATION APPEARS
TO HAVE OCCURRED IN SITU, PCES ARE VERY ANGULAR AND
APPEAR TO FIT TOGETHER ACROSS THE CACITE VEINS, PCE
9 SHOWS FLOW LAYERING THAT HAS BEEN FOLDED, A GREEN
ALTERATION MINERAL IS ABUNDANT, IT IS EITHER AN
ALTERATION PRODUCT OF GLASS OR VESICLE FILLING;
Leg : 62 Top/Bottom Interval(mm): 0/1500 Analyst: Windom, K
Hole: 465A Sample Midpoint (m) : 422.00
Core: 41 Top of Core Depth (m) : 419.00
Sect: 2 Top of Section Depth(m): 420.50
LITHOLOGY: TRACHYTE;
Piece No. : PCE 1 (1-3), 2A (5-11), 2B (11-15), 2C (13-17),
2D (18-22), 3 (25-28), 4 (30-35), 5 (36-45),
6 (47-51), 7 (53-58), 8 (60-65), 9 (66-71),
10 (72-77), 11A (80-88), 11B (88-92),
12 (95-101), 13 (102-112), 14 (115-120),
15 (122-128), 16 (130-135), 17A (137-143),
17B (144-150);
Texture : BRECCIATION IS MOST INTENSE IN THE UPPER 30CM OF THE
SECTION, PCE 2 IS FINE TO MEDIUM-GRAINED, GRAIN SIZE
APPEARS TO DECREASE DOWNWARD FROM THERE TO AT LEAST
PCE 14;
Structure : HIGHLY FRACTURED, FRACTURES NOW FILLED WITH CALCITE
AND OCCASIONALLY WITH A BRIGHT GREEN UNIDENTIFIED
MINERAL, LAYERING IS PRESENT IN PCES 12 AND 13 AND
PCE 2, THE LAYERING IS PRESUMED DUE TO FLOWAGE,
LAYERING IN PCE 12 IS FOLDED;
Alteration : EXT
ALTERATION IS PERVASIVE AND THE ROCK CAN EASILY
BE SCRATCHED WITH A SPATULA, A GREEN MATERIAL
IS UBIQUITOUS AND OCCURRING AS PATCHES THROUGHOUT
THE BASALT, IT IS PROBABLY A REPLACEMENT PRODUCT
OF EITHER GLASS OR IS A VESICLE FILLING;
Comments : IN CONTRAST TO THE UPPER PART OF SECTION 1
TRANSPORTATION OF BRECCIATED CLASTS DOES NOT APPEAR
TO HAVE OCCURRED WITH THE POSSIBLE EXCEPTION OF PCE
6 IN WHICH CALCITE ACCOUNTS FOR ABOUT HALF OF THE
SPECIMEN;
Vesicles : PCE 15 IS HIGHLY VESICULAR, PCES 16 AND 17 ARE
ALSO VESICULAR BUT CONTAIN FEWER VESICLES THAN
PCE 15;
Groundmass : PLAGIOCLASE
VISIBLE PLAG LATHS IN PCE 2;
Phenocrysts: PLAGIOCLASE
OLIVINE
PSEUDOMORPHED;
Replacement: CALCITE
PYRITE
PYRITE OCCURS SPARSELY DISSEMINATED THROUGHOUT THE
TRACHYTE;
Leg : 62 Top/Bottom Interval(mm): 0/ 950 Analyst: Windom, K
Hole: 465A Sample Midpoint (m) : 422.95
Core: 41 Top of Core Depth (m) : 419.00
Sect: 3 Top of Section Depth(m): 422.00
LITHOLOGY: TRACHYTE;
Piece No. : PCE 1 (1-6), 2A (7-12), 2B (12-21), 2C (21-27),
3A (30-37), 3B (36-40), 3C (40-43), 4A (45-50),
4B (50-55), 4C (55-60), 5 (62-65), 6 (67-71),
7 (73-77), 8 (80-85), 9 (87-92);
Texture : SMALL GRAIN SIZE IN PCE 1, FROM PCE 1 DOWNWARD
TO PCE 2C GRAIN SIZE INCREASES, GRAIN SIZE
APPROXIMATELY CONSTANT FROM PCE 2C THROUGH 3B THEN
DECREASING TO PCE 4C, PCE 5 IS FINE-GRAINED, GRAIN
SIZE INCREASES FROM PCE 5 DOWNWARD TO BOTTOM OF
CORE;
Structure : DEGREE OF FRACTURING IS REDUCED FROM TOP OF CORE
(SEE SECTIONS 1 AND 2) BUT SOME FRACTURING STILL IS
PRESENT, CALCITE FILLS VIRTUALLY ALL OF THE
FRACTURES, FRACTURING IS MOST INTENSE IN PCE 3C;
Alteration : EXT;
Comments : N6 GRAY COLOR;
Vesicles : TOP OF PCE 2A IS VESICULAR, PCES 2B+2C ARE
NON-VESICULAR, NUMBER OF OPEN VESICLES DECREASES
FROM PCE 1 DOWNWARD, PCE 5 IS VESICULAR, A DARK
GREEN MATERIAL MAY BE FILLING VESICLES;
Replacement: CALCITE
PYRITE
PYRITE IS VERY SCARCE IN THIS SECTION, A DARK
GREEN MATERIAL IS ABUNDANT THROUGHOUT THE BASALT
AND IT APPEARS TO BE EITHER REPLACING GLASS OR
FILLING VESICLES;
Leg : 62 Top/Bottom Interval(mm): 0/ 450 Analyst: Windom, K
Hole: 465A Sample Midpoint (m) : 428.95
Core: 42 Top of Core Depth (m) : 428.50
Sect: 1 Top of Section Depth(m): 428.50
LITHOLOGY: TRACHYTE BRECCIA;
Piece No. : PCE 1 (1-11), 2A (14-19), 2B (19-25), 3A (27-31),
3B (31-35), 3C (35-40), 3D (41-44);
Texture : BRECCIA CONTAINING VERY ANGULAR FRAGMENTS OF TRACHYT
THAT RANGE IN TEXTURE FROM FINE-GRAINED VESICULAR
TRACHYTE AND ALTERED GLASS TO MEDIUM-GRAINED TRACHYT
CONTAINING ORIENTED FELDSPARS, THE MATRIX IS MOSTLY
CALCITE, AN UNIDENTIFIED LIGHT-GREEN MINERAL
(COMMONLY OCCURRING AS CRYSTALS) IN THE OPEN VUGS
BETWEEN CLASTS, SEVERAL CLASTS ARE SURROUNDED BY
PYRITE, ONE CLAST IN PCE 3C IS VERY DIFFERENT
IN APPEARANCE FROM THE OTHER TRACHYTE (5YR/1 OLIVE
GRAY) AND MAY REPRESENT A DIFFERENTIATION;
Leg : 62 Top/Bottom Interval(mm): 450/ 600 Analyst: Windom, K
Hole: 465A Sample Midpoint (m) : 429.10
Core: 42 Top of Core Depth (m) : 428.50
Sect: 1 Top of Section Depth(m): 428.95
LITHOLOGY: TRACHYTE AND TRACHYTE BRECCIA;
Piece No. : PCE 4 (45-60);
Texture : APHYRIC , APHANITIC, ONE PCE EXHIBITS AN
INTERFACE OF BRECCIA WITH VESICULAR TRACHYTE;
Alteration : EXT;
Vesicles : SEVERAL SMALL VESICULAR PCES;
Leg : 62 Top/Bottom Interval(mm): 610/1500 Analyst: Windom, K
Hole: 465A Sample Midpoint (m) : 430.00
Core: 42 Top of Core Depth (m) : 428.50
Sect: 1 Top of Section Depth(m): 429.11
LITHOLOGY: TRACHYTE;
Piece No. : PCE 5 (62-75), 6A (77-82), 6B (82-87), 6C (88-96),
6D (97-105), 6E (105-111), 6F (110-115),
7 (115-120), 8A (121-140), 8B (140-148);
Texture : APHYRIC, APHANITIC;
Structure : VEINS OF CALCITE OCCUR IN PCES 5A+5B+6A-6F AND
IN RUBBLE IN BAG OF PCE 7;
Alteration : EXT;
Comments : N6 GRAY IN COLOR;
Replacement: CALCITE
PYRITE
SPARCE PYRITE DISSEMINATED THROUGHOUT THIS
INTERVAL;
Leg : 62 Top/Bottom Interval(mm): 0/1420 Analyst: Seifert, K.
Hole: 465A Sample Midpoint (m) : 431.42
Core: 42 Top of Core Depth (m) : 428.50
Sect: 2 Top of Section Depth(m): 430.00
LITHOLOGY: TRACHYTE;
Piece No. : PCE 1A (0-7), 1B (7-14), 2A (16-22), 2B (22-29),
3 (30-35), 4A (37-45), 4B (44-48), 5 (51-60),
6 (61-66), 7 (69-78), 8A (81-87), 8B (88-95),
9 (97-105), 10 (108-115), 11 (117-122),
12 (124-130), 13 (132-140);
Texture : APHYRIC, VERY FINE-GRAINED, PCES 5+11+13 HAVE
SLIGHTLY LARGER PLAG MICROPHENOS;
Structure : VEINS ARE FILLED WITH CALCITE;
Alteration : EXT;
Comments : N7 LIGHT GRAY;
Vesicles : Size(mm): >1 Percent:
Location: Filling: SMEC,CALCITE
MANY VESICLES, RANGE UP TO 1CM AND RANGE FROM
UNALIGNED TO FAIRLY WELL ALIGNED, SMEC(?) RIM
AND A CENTRAL FILLING OF CALCITE;
Phenocrysts: PLAGIOCLASE
MICROPHENOS, SLIGHTLY LARGER IN PCES 5+11+13;
Replacement: CALCITE
SMECTITE
ID UNCERTAIN;
SULFIDE
DISSEMINATED SULFIDES OCCUR THROUGHOUT;
Leg : 62 Top/Bottom Interval(mm): 0/1470 Analyst: Seifert, K.
Hole: 465A Sample Midpoint (m) : 432.97
Core: 42 Top of Core Depth (m) : 428.50
Sect: 3 Top of Section Depth(m): 431.50
LITHOLOGY: TRACHYTE;
Piece No. : PCE 1A (1-9), 1B (9-17), 1C (19-28), 2 (31-36),
3 (38-45), 4 (46-54), 5 (55-60), 6 (62-67),
7 (69-78), 8 (80-90), 9 (91-102), 10A (104-106),
10B (106-109), 11 (111-116), 12 (118-125),
13 (127-130), 14A (132-134), 14B (135-137),
14C (137-141), 15 (145-147);
Texture : APHYRIC, VERY FINE-GRAINED;
Structure : VEINS ARE FILLED WITH CALCITE;
Alteration : EXT
VERY BADLY ALTERED;
Comments : N7 LIGHT GRAY, FLOW UNIT PCES 6-9, FLOW UNIT PCES
9-15;
Vesicles : Size(mm): >=1 Percent:
Location: Filling: SMEC
VESICULAR TRACHYTE, MOST VESICLES ARE >=1MM BUT
SOME ARE A FEW MM IN SIZE, VESICLES ARE SOMETIMES
ORIENTED, THEY RANGE FROM EQUIDIMENSIONAL POORLY
ALIGNED TO FLATTENED ELLIPTICAL WELL ALIGNED, IN
PCES 9-11 THE VESICLES ARE FILLED-LINED WITH
SMEC? AND THE CENTER FILLED WITH OTHER MATERIAL;
Replacement: SULFIDES
SULFIDES ARE DISSEMINATED THROUGHOUT THE TRACHYTE
BUT OCCURS IN LARGER AMOUNTS IN PCES 1A+1B;
Leg : 62 Top/Bottom Interval(mm): 0/ 150 Analyst: Windom, K
Hole: 465A Sample Midpoint (m) : 433.15
Core: 42 Top of Core Depth (m) : 428.50
Sect: 4 Top of Section Depth(m): 433.00
LITHOLOGY: TRACHYTE;
Piece No. : PCE 1 (2-15);
Texture : VERY FINE-GRAINED;
Alteration : EXT
ALTERED TRACHYTE;
Comments : GRAY N5;
Vesicles : TWO PCES CONTAIN A FEW VESICLES;
Leg : 62 Top/Bottom Interval(mm): 0/1480 Analyst: Seifert, K.
Hole: 465A Sample Midpoint (m) : 439.48
Core: 43 Top of Core Depth (m) : 438.00
Sect: 1 Top of Section Depth(m): 438.00
LITHOLOGY: TRACHYTE;
Piece No. : PCE 1 (2-7), 2 (10-12), 3 (15-17), 4 (10-15),
5 (16-31), 6 (33-37), 7 (40-42), 8 (44-46),
9 (48-52), 10 (55-61), 11 (63-66), 12 (69-74),
13 (77-81), 14 (82-88), 15 (90-96), 16 (97-102),
17 (105-110), 18 (112-120), 19A (121-127),
19B (127-134), 20 (136-141), 21 (145-148);
Texture : FINE-GRAINED, PCES 2-4 ARE SLIGHTLY COARSER GRAINED
AND PCES 1+5 ARE FINER GRAINED;
Structure : PYRITE CONCENTRATIONS IN VEINS;
Alteration : EXT
HIGHLY ALTERED;
Comments : N7 LIGHT GRAY, INDIVIDUAL FLOW UNITS COMPRISED OF
PCES 1-5 AND PCES 6-9 AND PCES 13-16 AND PCES 16-
19 AND PCES 19 ON DOWN, FLOW UNITS ARE BASED ON
VESICLE AND MICROPHENO SIZE VARIATIONS;
Vesicles : Size(mm): TO 5 Percent:
VESICULAR, VESICLE SIZE RANGES UP TO 5MM BUT IS
GENERALLY ABOUT 1MM;
Phenocrysts: PLAGIOCLASE
SMALL PARALLEL TO SUBPARALLEL PLAG MICROPHENOS
THROUGHOUT;
Replacement: PYRITE
FAIRLY DISSEMINATED PYRITE IN SMALL AMOUNTS WITH
CONCENTRATIONS IN VEINS;
Leg : 62 Top/Bottom Interval(mm): 0/1400 Analyst: Seifert, K.
Hole: 465A Sample Midpoint (m) : 440.90
Core: 43 Top of Core Depth (m) : 438.00
Sect: 2 Top of Section Depth(m): 439.50
LITHOLOGY: TRACHYTE;
Piece No. : PCE 1 (0-8), 2 (11-15), 3 (17-19), 4A (22-28),
4B (28-31), 4C (31-37), 5 (40-50), 6 (52-62),
7A (65-70), 7B (72-75), 8 (77-88), 9 (90-94),
10 (96-102), 11 (105-108), 12 (110-117),
13 (122-127), 14 (130-138);
Texture : VERY FINE-GRAINED;
Alteration : EXT
HIGHLY ALTERED;
Comments : N7 LIGHT GRAY, INDIVIDUAL FLOW UNITS INCLUDE PCES
1-4C AND PCES 7-10 AND PCES 10-14;
Vesicles : Size(mm): TO 5 Percent:
Location: Filling: SMEC,CALCITE
VESICULAR, VESICLE SIZE RANGES UP TO 5MM BUT IS
GENERALLY NEAR 1MM OR LESS, VESICLES FILLED WITH
SMEC? LINING AND CENTRAL CALCITE FILLINGS IN
PCES 1+2+8;
PCES 5-7 ARE VERY VESICULAR;
Phenocrysts: PLAGIOCLASE
SMALL PLAG MICROPHENOS IN PCES 5-7;
Replacement: SMECTITE
ID UNCERTAIN;
CALCITE
PYRITE
DISSEMINATED PYRITE IN SMALL AMOUNTS THROUGHOUT-
LESS IN CORE 43 THAN IN CORE 42;
Leg : 62 Top/Bottom Interval(mm): 0/1500 Analyst: Seifert, K.
Hole: 465A Sample Midpoint (m) : 449.00
Core: 44 Top of Core Depth (m) : 447.50
Sect: 1 Top of Section Depth(m): 447.50
LITHOLOGY: TRACHYTE;
Piece No. : PCE 1 (2-8), 2A (12-19), 2B (19-22), 3 (25-30),
4 (32-37), 5 (39-45), 6 (46-50), 7 (53-57),
8A (60-62), 8B (65-67), 9 (70-75), 10 (77-82),
11 (84-92), 12A (95-97), 12B (97-102),
13A (105-111), 13B (111-117), 13C (119-122),
14 (125-128), 15A (131-135), 15B (135-139),
16A (141-146), 16B (148-150);
Texture : FINE-GRAINED;
Alteration : EXT
HIGHLY ALTERED;
Comments : N7 LIGHT GRAY, INDIVIDUAL FLOW UNITS INCLUDE PCES
1-8B AND 8B-13B AND 13B-16B;
Vesicles : Size(mm): TO 5 Percent:
VESICULAR THROUGHOUT, VESICLES RANGE FROM >=1MM
IN GENERAL TO 5MM;
Phenocrysts: PLAGIOCLASE
MICROPHENOS;
Replacement: PYRITE
SOME VERY FAIRLY DISSEMINATED PYRITE;
Leg : 62 Top/Bottom Interval(mm): 0/1450 Analyst: Seifert, K.
Hole: 465A Sample Midpoint (m) : 450.45
Core: 44 Top of Core Depth (m) : 447.50
Sect: 2 Top of Section Depth(m): 449.00
LITHOLOGY: TRACHYTE;
Piece No. : PCE 1 (2-7), 2 (10-13), 3A (15-18), 3B (19-22),
4 (25-32), 5 (34-39), 6A (41-43), 6B (45-47),
6C (47-48), 7A (50-52), 7B (52-55), 7C (55-58),
8A (61-63), 8B (64-65), 8C (64-67), 9A (69-74),
9B (75-81), 9C (81-87), 9D (88-92), 10 (96-100),
11 (102-106), 12A (108-112), 12B (114-115),
13 (117-120), 14 (125-128), 15 (133-135),
16 (140-143);
Texture : FINE-GRAINED, FINE-GRAINED FROM 9A ON THROUGH THE
REMAINDER OF THE CORE-PCE 16;
Alteration : EXT
HIGHLY ALTERED;
Comments : N7 LIGHT GRAY, INDIVIDUAL FLOW UNITS INCLUDE
PCES 1-3A AND 3B-7C AND 7C-9B?;
Vesicles : Size(mm): TO 5MM Percent:
VESICULAR, VESICLES RANGE FROM GENERALLY >=1MM
TO 5MM IN SIZE, VESICULAR FROM 9A ON THROUGH THE
REMAINDER OF CORE-PCE 16;
Phenocrysts: PLAGIOCLASE
MICROPHENOS;
Replacement: PYRITE
FINELY DISSEMINATED PYRITE IN VERY SMALL
AMOUNTS;
Leg : 62 Top/Bottom Interval(mm): 0/1500 Analyst: Windom, K
Hole: 465A Sample Midpoint (m) : 452.00
Core: 44 Top of Core Depth (m) : 447.50
Sect: 3 Top of Section Depth(m): 450.50
LITHOLOGY: TRACHYTE;
Piece No. : PCE 1A (3-9), 1B (9-16), 1C (16-19), 1D (20-24),
2A (26-31), 2B (31-36), 2C (36-41), 3A (42-48),
3B (48-55), 3C (55-61), 3D (61-66), 3E (66-70),
4A (74-76), 4B (77-81), 5 (82-87), 6A (90-101),
6B (101-111), 6C (111-117), 7A (118-132),
7B (132-135), 7C (135-149);
Texture : APHYRIC, APHANITIC;
Structure : VEINS FILLED WITH CALCITE ARE COMMON;
Alteration : EXT
ALTERATION OF BASALT PRESENT AROUND VEINS;
Comments : N6 GRAY;
PCES 6A+6B SHOW A VERY FAINT REDDISH COLOR;
Vesicles : VESICULAR, SOME VESICLES ARE FLATTENED
PERPENDICULAR TO AXIAL DIRECTION OF CORE;
Replacement: CALCITE
Leg : 62 Top/Bottom Interval(mm): 0/1480 Analyst: Windom, K
Hole: 465A Sample Midpoint (m) : 558.48
Core: 45 Top of Core Depth (m) : 557.00
Sect: 1 Top of Section Depth(m): 557.00
LITHOLOGY: TRACHYTE;
Piece No. : PCE 1A (2-14), 1B (15-16), 1C (16-18), 1D (19-26),
1E (26-32), 1F (31-32), 2 (35-37), 3 (40-42),
4A (45-51), 4B (51-55), 5A (58-67), 5B (67-76),
5C (76-88), 6 (91-95), 7A (97-105), 7B (106-111),
8A (114-121), 8B (121-125), 9 (126-131),
10 (133-136), 11A (138-142), 11B (143-148);
Texture : APHYRIC, APHANITIC;
Structure : SEVERAL PCES CONTAIN FRACTURES FILLED WITH CALCITE;
Alteration : EXT
ALTERATION IS COMMON AROUND THE VEINS, CALCITE
ALSO OCCURS AS PATCHES SCATTERED THROUGHOUT THE
TRACHYTE;
Comments : N6 GRAY, PCES 6+7A+7B+9-11 HAVE A FAINT REDDISH
TINT ESPECIALLY SURROUNDING SOME OF THE LARGER
VESICLES;
Vesicles : DEGREE OF VESICULATION VARIABLE, PCES 4A+B
CONTAIN FEWER VESICLES THAN PCES ABOVE OR BELOW,
PCES 8A+B CONTAIN FEWER THAN SURROUNDING PCES;
Replacement: CALCITE
Leg : 62 Top/Bottom Interval(mm): 0/1470 Analyst: Windom, K
Hole: 465A Sample Midpoint (m) : 559.97
Core: 45 Top of Core Depth (m) : 557.00
Sect: 2 Top of Section Depth(m): 558.50
LITHOLOGY: TRACHYTE;
Piece No. : PCE 1 (2-7), 2 (8-16), 3 (17-25), 4 (26-33),
5 (35-38), 6 (41-46), 7 (48-54), 8 (55-60),
9 (62-68), 10 (70-74), 11 (75-81), 12 (82-90),
13 (90-95), 14 (97-105), 15A (97-111),
15B (111-115), 15C (115-120), 15D (121-125),
16A (127-134), 16B (134-147);
Texture : APHYRIC, APHANITIC;
Structure : CALCITE VEINS COMMON;
Alteration : EXT;
Comments : N6 GRAY, PCES 3+9-11+14+15 HAVE A FAINT REDDISH
TINT;
Vesicles : VESICULAR, VESICLES COMMONLY FLATTENED
PERPENDICULAR TO AXIS OF CORE, NUMBER AND SIZE
OF VESICLES DECREASES IN BOTTOM OF PCE 3, PCES
4-7 CONTAIN MORE THAN BOTTOM OF PCE 3 BUT LESS
THAN 1AND 2 AND TOP OF PCE 3, VESICLE SIZE THEN
INCREASES FROM PCE 8 TO BOTTOM OF SECTION-PCE
17;
Replacement: CALCITE
Leg : 62 Top/Bottom Interval(mm): 0/1450 Analyst: Seifert, K.
Hole: 465A Sample Midpoint (m) : 561.45
Core: 45 Top of Core Depth (m) : 557.00
Sect: 3 Top of Section Depth(m): 560.00
LITHOLOGY: TRACHYTE;
Piece No. : PCE 1 (3-7), 2 (10-12), 3 (15-18), 4 (20-25),
5 (28-32), 6 (35-37), 7 (40-43), 8 (45-49),
9 (51-57), 10 (60-62), 11 (65-70), 12 (71-75),
13 (77-81), 14 (85-94), 15 (96-103), 16 (120-126),
17 (127-130), 18A (132-136), 18B (137-141),
18C (141-145);
Texture : FINE-GRAINED, PCES 1-7 ARE FINE-GRAINED, PORTIONS OF
THE CUT SURFACE HAVE A REDDISH CAST;
Alteration : EXT
HIGHLY ALTERED;
Comments : N7 LIGHT GRAY, FLOW UNIT PCES 8-18C AND CONTINUED;
Vesicles : VESICULAR, PCES 1-7 ARE HIGHLY VESICULAR;
Phenocrysts: PLAGIOCLASE
FRESH PLAG MICROPHENOS;
OLIVINE
PSEUDOMORPHED BY A BRIGHT GREEN SOFT MINERAL BUT
HAS MAINTAINED GOOD EUHEDRAL OUTLINES, RELIC OL;
PYROXENE
OCCASIONAL MICROPHENOCRYST OCCURS;
Replacement: PYRITE
SMALL AMOUNTS OF SCATTERED PYRITE;
Leg : 62 Top/Bottom Interval(mm): 0/1470 Analyst: Seifert, K.
Hole: 465A Sample Midpoint (m) : 562.97
Core: 45 Top of Core Depth (m) : 557.00
Sect: 4 Top of Section Depth(m): 561.50
LITHOLOGY: TRACHYTE;
Piece No. : PCE 1A (2-5), 1B (5-8), 1C (8-10), 1D (10-14),
2 (17-21), 3 (26-27), 4 (30-35), 5 (39-43),
6 (45-51), 7 (55-60), 8 (62-65), 9 (68-73),
10 (75-83), 11A (85-87), 11B (88-96), 11C (96-100),
12 (101-106), 13A (108-114), 13B (115-118),
14 (121-126), 15 (130-132), 16 (135-138),
17 (140-147);
Texture : FINE TO MEDIUM-GRAINED;
Structure : PYRITE VEINS DISSEMINATED THROUGHOUT CORE;
Alteration : EXT
HIGHLY ALTERED;
Comments : N7 LIGHT GRAY, FLOW UNIT (CONTINUED) PCES 1-4,
FLOW UNIT PCES 5-11C, FLOW UNIT 11C-16;
Vesicles : Size(mm): TO 5 Percent:
VARYING AMOUNTS OF VESICLES, VESICLE SIZE NORMALLY
>=1MM BUT RANGES TO 5MM;
Phenocrysts: PLAGIOCLASE
USUAL ABUNDANT PLAG MICROPHENOS;
OLIVINE
FEW EUHEDRAL AND BRIGHT GREEN OL PSEUDOMORPHS;
Replacement: PYRITE
Leg : 62 Top/Bottom Interval(mm): 0/ 140 Analyst: Seifert, K.
Hole: 465A Sample Midpoint (m) : 563.14
Core: 45 Top of Core Depth (m) : 557.00
Sect: 5 Top of Section Depth(m): 563.00
LITHOLOGY: TRACHYTE;
Piece No. : PCE 1 (2-5), 2 (8-11);
Texture : FINE-GRAINED;
Alteration : EXT
HIGHLY ALTERED;
Comments : N7 LIGHT GRAY;
Vesicles : VESICULAR;
Phenocrysts: PLAGIOCLASE
MICROPHENOS;
OLIVINE
A FEW OF THE USUAL BRIGHT GREEN OL PSEUDOMORPHS;
Leg : 62 Top/Bottom Interval(mm): 0/1480 Analyst: Seifert, K.
Hole: 465A Sample Midpoint (m) : 467.98
Core: 46 Top of Core Depth (m) : 466.50
Sect: 1 Top of Section Depth(m): 466.50
LITHOLOGY: TRACHYTE;
Piece No. : PCE 1 (0-6), 2 (8-12), 3 (14-20), 4 (23-29),
5 (31-35), 6A (36-42), 6B (42-48), 6C (49-57),
6D (58-67), 6E (67-75), 6F (73-80), 6G (80-86),
6H (86-91), 7 (95-100), 8A (101-106), 8B (107-115),
8C (112-126), 8D (126-132), 9A (135-141),
9B (141-147);
Texture : FINE-GRAINED;
Alteration : EXT
BADLY ALTERED TO SMEC, PCES 6E+6F+6G HAVE
ABUNDANT BRIGHT GREEN PATCHES PERHAPS OL
PSEUDOMORPHS IN PART;
Comments : N7 LIGHT GRAY;
Vesicles : Size(mm): TO 5 Percent:
HIGHLY VESICULAR, VESICLE SIZE IS GENERALLY
>=1MM BUT RANGES UP TO 5MM AS IN PREVIOUS CORES;
Phenocrysts: PLAGIOCLASE
FINE PLAG MICROPHENOS THROUGHOUT;
OLIVINE
OCCASIONAL BRIGHT GREEN OL PSEUDOMORPHS;
Replacement: SMECTITE
PYRITE
FINELY DISSEMINATED PYRITE OCCURS THROUGHOUT;
Leg : 62 Top/Bottom Interval(mm): 0/1500 Analyst: Seifert, K.
Hole: 465A Sample Midpoint (m) : 469.50
Core: 46 Top of Core Depth (m) : 466.50
Sect: 2 Top of Section Depth(m): 468.00
LITHOLOGY: TRACHYTE;
Piece No. : PCE 1 (0-3), 2 (6-10), 3 (12-20), 4A (22-31),
4B (32-39), 5A (41-46), 5B (46-51), 5C (52-62),
6 (64-72), 7 (74-77), 8 (79-86), 9 (90-97),
10A (100-105), 10B (106-110), 10C (110-119),
10D (119-122), 10E (122-130), 11 (132-137),
12 (140-150);
Texture : FINE-GRAINED, PCES 9-12 ARE MEDIUM-GRAINED;
Alteration : EXT
BADLY ALTERED;
Comments : N7 LIGHT GRAY, FLOW UNIT PCES 4B-7;
Vesicles : PCES 1-4 HAVE VESICLES MOSTLY FILLED WITH
GREEN OR WHITE MATERIAL, PCES 9-12 ARE VESICULAR,
PCES 4C-12 HAVE EMPTY VESICLES;
Phenocrysts: PLAGIOCLASE
MICROPHENOS;
OLIVINE
OCCASIONAL OL PSEUDOMORPHS;
Replacement: PYRITE
FINELY DISSEMINATED PYRITE OCCURS IN SMALL
AMOUNTS;
Leg : 62 Top/Bottom Interval(mm): 0/1030 Analyst: Seifert, K.
Hole: 465A Sample Midpoint (m) : 470.53
Core: 46 Top of Core Depth (m) : 466.50
Sect: 3 Top of Section Depth(m): 469.50
LITHOLOGY: TRACHYTE;
Piece No. : PCE 1A (0-6), 1B (7-12), 2 (15-19), 3 (21-24),
4 (26-35), 5 (36-40), 6 (42-47), 7 (49-55),
8 (57-65), 9A (68-72), 9B (72-77), 9C (78-82),
10 (86-89), 11 (92-102);
Texture : MEDIUM-GRAINED, PCE 7 IS FINE-GRAINED;
Alteration : EXT
HIGHLY ALTERED THROUGHOUT;
Comments : N7 LIGHT GRAY;
Vesicles : Size(mm): TO 5 Percent:
VESICLE SIZE STILL THE SAME, GENERALLY>=1MM BUT UP
TO 5MM, VESICLES ARE FILLED IN PCES 6+8+9A+10;
Phenocrysts: PLAGIOCLASE
PLAG MICROPHENOS;
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