Leg : 73 Top/Bottom Interval(mm): 0/1350 Analyst: Carman, M.
Hole: 519A Sample Midpoint (m) : 154.35
Core: 7 Top of Core Depth (m) : 153.00
Sect: 1 Top of Section Depth(m): 153.00
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (2-5), 2 (5-9), 3 (15-19), 4 (22-28),
5 (30-33), 6 (36-45), 7 (48-55), 8 (58-64),
9 (68-75), 10 (77-85), 11 (88-94), 12 (98-103),
13 (105-116), 14 (122-135);
Texture : APHYRIC,GRADATIONAL GRAINSIZE FROM VERY FINE
(<0.5MM) AT TOP TO COARSE-GRAINED(0.1-0.5MM) AT
BOTTOM(PCES 11-14),PCES 1-4+6+8 HAVE BLACK GLASSY
RIND(FEW MM THICK);
Structure : RUBBLY PERHAPS SOMEWHAT PILLOWED UPPER SURFACE,PCES
1-11 THOROUGHLY JOINTED ON SCALE OF 1-5CM WITH
JOINTS FILLED WITH CALCITE,PCE 9 HAS 2-3MM THICK FE-
STAINED CALCITE VEIN;
Alteration : MOD TO EXT
PCES 1-2 PARTLY ALT.GLAS TO ORANGE-BROWN PALAG,
PCES 1-11 ALTERATION CONCENTRATED IN ZONES
BORDERING JOINTS;
Comments : FLOW UNIT 1,BASALT COLOR RANGES FROM BLACK TO DARK
BROWN PART OF PCE 4 & 2 FRAGMENTS OF PCE 6 ARE TAN
XTLLINE(BAKED) LIMESTONE WITH SUGGESTIONS OF ROUNDED
MICROFOSSIL RELICS;
Vesicles : SPARSELY VESICULAR AT TOP OF SECTION(PCES 1-8),
PCE 7 HAS VESICLE-LIKE PATCH WITH ROUNDED BASALT
PARTICLES SET IN CALCITE MATRIX;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): 0.2-0.5
MICROPHENOS FORMING GLOMEROCRYSTIC CLUSTERS;
Replacement: PALAGONITE
Minerals Replaced: GLASS
ORANGE-BROWN;
CALCITE
FILLS JOINTS,FE-STAINED VEIN IN PCE 9;
Leg : 73 Top/Bottom Interval(mm): 0/ 600 Analyst: Carman, M.
Hole: 519A Sample Midpoint (m) : 155.10
Core: 7 Top of Core Depth (m) : 153.00
Sect: 2 Top of Section Depth(m): 154.50
LITHOLOGY: APHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 1A (2-9), 1B (9-13), 1C (12-18), 2 (22-28),
3 (31-45), 4 (47-58);
Texture : APHYRIC,SUBOPHITIC TO OPHITIC INTERSERTAL,GRAINSIZE
GRADATIONAL FROM MEDIUM-TO-VERY COARSE-GRAINED(2MM)
& COARSENING DOWNWARD,CENTER OF FLOW(?);
Structure : MASSIVE BASALT;
Alteration : MOD TO EXT
Comments : DARK GREENISH GRAY,CONTINUATION OF FLOW UNIT 1,PCE 4
MARKS END OF CORE;
Leg : 73 Top/Bottom Interval(mm): 0/ 850 Analyst: Carman, M.
Hole: 519A Sample Midpoint (m) : 161.35
Core: 8 Top of Core Depth (m) : 160.50
Sect: 1 Top of Section Depth(m): 160.50
LITHOLOGY: APHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 1A (0-13), 1B (13-45), 1C (45-62), 1D (62-71),
1E (71-78), 2A (83-84), 2B (80-83), 3A (86-96),
3B (96-105), 3C (105-108), 3D (110-118),
3E (119-123), 4A (126-132), 4B (130-134),
4C (135-136);
Texture : APHYRIC,SIMILAR TO CORES 7-1 & 7-2,COARSE-GRAINED
(0.1-0.5MM),PCE 2B IS VERY FINE-GRAINED BASALT WITH
PINK CLAY.MINS OR SILICEOUS COATING ON ONE END,PCES
4A-4C MEDIUM-GRAINED,PCE 3A VERY FINE-GRAINED;
Structure : MASSIVE BASALT,PCES 1A-2A WITH SPARSE THIN(0.5MM)
CALCITE-FILLED VEINS,FRACTURED ZONE,NON-BRECCIATED
MATERIAL DOWN CORE(PCES 3B-4C) LACED WITH 1-3MM
THICK CALCITE VEINS;
Alteration : MOD TO EXT
LOCALLY ALTERED ESPECIALLY BORDERING WIDELY SPACED
SUBHORIZONTAL JOINTS,PCE 2B BADLY ALTERED WITH
PINK CLAY.MINS OR SILICEOUS COATING ON ONE END;
Comments : DARK GREENISH GRAY & LOCALLY ALTERED TO LIGHT BROWN,
PCE 3A IS MEDIUM BROWN & BEGINS FLOW UNIT 2,PCE 3A
BRECCIATED,PCES 4A-4C BROWNISH-GRAY;
Replacement: CALCITE
VEINS,PCE 3A IS BRECCIATED WITH CALCITE BETWEEN
FRAGMENTS;
SMECTITE
PCE 3B YELLOW-GREEN SMEC COATS VEINS;
CLAY
PINK CLAY.MINS OR SILICEOUS COATING ON ONE END OF
PCE 2A;
Leg : 73 Top/Bottom Interval(mm): 0/1400 Analyst: Carman, M.
Hole: 519A Sample Midpoint (m) : 163.40
Core: 8 Top of Core Depth (m) : 160.50
Sect: 2 Top of Section Depth(m): 162.00
LITHOLOGY: APHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 1A (2-14), 1B (14-17), 1C (20-28), 1D (30-34),
1E (34-44), 1F (45-57), 1G (57-65), 1H (64-68),
1J (68-79), 1K (74-58), 1L (85-101), 1M (102-108),
1N (105-125), 1O (115-125), 1P (126-130),
2 (135-140);
Texture : APHYRIC,SIMILAR TO FLOW UNIT 2 OF CORE 8-1,MEDIUM-
TO-COARSE-GRAINED;
Structure : MASSIVE BASALT,SMEC COATED CALCITE-FILLED VEINS
COMMON ESPECIALLY IN UPPER HALF OF SECTION,PROMINENT
CONJUGATE FRACTURE SET ORIENTED AT ABOUT 30 DEGREES
TO CORE AXIS & SPACED 5-15CM APART THROUGHOUT;
Alteration : MOD TO EXT
PCES 1C-1H HAS DARK ORANGE ALTERATION PATCHES
(0.2-2MM IN SIZE);
Comments : CONTINUATION OF FLOW UNIT 2,BROWNISH-GRAY BASALT;
Vesicles : Size(mm): 1 Percent:
Location: Filling: ZEOL
PCES 1C-1H HAVE SMALL VESICLES FILLED WITH CLEAR
TO WHITE ZEOL(?);
Replacement: SMECTITE
CALCITE
ZEOLITE
ID ZEOL UNCERTAIN,CLEAR TO WHITE;
Leg : 73 Top/Bottom Interval(mm): 0/1400 Analyst: Carman, M.
Hole: 519A Sample Midpoint (m) : 164.90
Core: 8 Top of Core Depth (m) : 160.50
Sect: 3 Top of Section Depth(m): 163.50
LITHOLOGY: APHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 1A (2-24), 1B (24-29), 1C (29-39), 1D (39-46),
1E (47-54), 1F (54-60), 1G (59-62), 2A (64-70),
2B (70-78), 2C (78-84), 2D (84-100), 3 (103-107),
4A (111-115), 4B (115-134), 5 (137-138);
Texture : APHYRIC,SIMILAR TO CORE 8-2,UNIFORMLY COARSE
GRAINED;
Structure : MASSIVE BASALT,LESS DEVELOPMENT OF CONJUGATED
FRACTURE SET(AS IN CORE 8-2),PCE 4 HAS CONJUGATE
FRACTURES AT ABOUT 60 DEGREES TO CORE AXIS;
Alteration : MOD TO EXT
FRESH
CENTER OF PCE 2D;
Comments : DARK BROWNISH-GRAY BASALT,CENTER OF PCE 2D IS
GREENISH-GRAY,CONTINUATION OF FLOW UNIT 2;
Vesicles : Size(mm): 1-10 Percent:
Location: Filling: CALCITE
PCES 1D-1F+2B HAVE SPARSE CALCITE-FILLED VESICLES;
Replacement: CALCITE
Leg : 73 Top/Bottom Interval(mm): 0/ 900 Analyst: Carman, M.
Hole: 519A Sample Midpoint (m) : 165.90
Core: 8 Top of Core Depth (m) : 160.50
Sect: 4 Top of Section Depth(m): 165.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (4-14), 1B (12-21), 1C (22-25), 1D (25-35),
1E (35-44), 2A (45-55), 2B (56-63), 3A (72-74),
3B (75-85), 4 (86-90);
Texture : APHYRIC,PCES 1A-2B SIMILAR TO PCES OF FLOW UNIT 2,
PCES 1A-2B COARSE-GRAINED,PCES 3A-4 VERY FINE-
GRAINED;
Structure : VEINING IN PCES 1A-2B SIMILAR TO FLOW UNIT 2 OF CORE
8-1,PCE 3A HAS FE-STAINED OPAL-FILLED VEINLET,PCES
1A-2B HAVE CONJUGATE FRACTURE SET AT 30 DEGREES TO
CORE AXIS;
Alteration : MOD TO EXT
PCES 1D-2B+3B,PCE 4 COMPLETELY ALTERED;
Comments : PCE 2B ENDS FLOW UNIT 2,PCE 3A BEGINS FLOW UNIT
2A(?),PCE 4 ENDS FLOW UNIT 2A,PCES 1A-2B DARK
GREENISH-GRAY,PCES 3A+4 LIGHT BROWN,PCE 3B IS BLACK
& BLEACHED TO LIGHT BROWN IN UPPER END,FLOW UNIT 2A
COULD ACTUALLY BE A PART OF FLOW UNIT 2;
Vesicles : PCE 3B VESICULAR;
Leg : 73 Top/Bottom Interval(mm): 900/1000 Analyst: Carman, M.
Hole: 519A Sample Midpoint (m) : 166.00
Core: 8 Top of Core Depth (m) : 160.50
Sect: 4 Top of Section Depth(m): 165.90
LITHOLOGY: APHYRIC BASALT;
BASALTIC BRECCIA;
Piece No. : PCE 5 (92-100);
Texture : APHYRIC,VERY FINE-GRAINED,ANGULAR FRAGMENTS SET IN
CALCITE MATRIX;
Alteration : EXT
COMPLETELY ALTERED;
Comments : DARK TAN BASALTIC BRECCIA,PCE 5 BEGINS FLOW UNIT 3;
Replacement: CALCITE
Leg : 73 Top/Bottom Interval(mm): 1000/1360 Analyst: Carman, M.
Hole: 519A Sample Midpoint (m) : 166.36
Core: 8 Top of Core Depth (m) : 160.50
Sect: 4 Top of Section Depth(m): 166.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 6 (101-105), 7A (108-124), 7B (124-136);
Texture : APHYRIC,PCES 6-7A FINE-GRAINED,PCE 7B VERY FINE-
GRAINED;
Structure : PCE 7B HEMA-FILLED VEIN 2-3MM WIDE;
Alteration : EXT
Comments : PCE 7B ENDS FLOW UNIT 3;
Vesicles : Size(mm): 0.1-0.2 Percent:
Location: Filling: ZEOL
SMALL VESICLES FILLED WITH WHITE ZEOL(?);
Replacement: ZEOLITE
WHITE,ID ZEOL UNCERTAIN;
HEMATITE
RED;
Leg : 73 Top/Bottom Interval(mm): 1360/1450 Analyst: Carman, M.
Hole: 519A Sample Midpoint (m) : 166.45
Core: 8 Top of Core Depth (m) : 160.50
Sect: 4 Top of Section Depth(m): 166.36
LITHOLOGY: BRECCIA;
Piece No. : PCE 8 (139-142);
Texture : GLASS BRECCIA COMPOSED OF 0.5MM-2.5CM TACHYLITE
FRAGMENTS;
Structure : FRAGMENTS RIMMED WITH CONCENTRIC BANDS OF ORANGE-
BROWN PALAG & FE.OX(?);
Alteration : EXT
Comments : ORANGE-BROWN GLASS BRECCIA,PCE 8 BEGINS FLOW UNIT 4;
Replacement: PALAGONITE
ORANGE-BROWN;
FERROUS MN OXIDE
ID FE.OX UNCERTAIN;
PHILLIPSITE
CLEAR GLASSY BLADED XTLS,ID PHIL UNCERTAIN;
Leg : 73 Top/Bottom Interval(mm): 0/1250 Analyst: Carman, M.
Hole: 519A Sample Midpoint (m) : 172.75
Core: 9 Top of Core Depth (m) : 171.50
Sect: 1 Top of Section Depth(m): 171.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (2-15), 1B (16-26), 1C (25-35), 1D (35-49),
1E (49-65), 1F (66-78), 1G (76-84), 1H (84-87),
2 (90-103), 3 (106-124);
Texture : APHYRIC,COARSENS GRADUALLY FROM VERY FINE-GRAINED
(<0.05MM) TO COARSE-GRAINED(0.1-0.5MM),PCES 1C-1E
HAVE VERY FINE-GRAINED BASALT ENCLOSED IN COARSER
FINE-GRAINED PHASE WITH THE FINER PHASE SHOWING
VARIOLITIC TEXTURE WITH VARIOLES INCREASING &
MERGING AWAY FROM CONTACT WITH LOWER PHASE(FINER
PHASE INTRUDES COARSER & CHILLED AGAINST IT);
Structure : CALCITE & SMEC-FILLED VEINS OCCUR THROUGHOUT WITH
MOST CONCENTRATED IN PCES 1B+1E-1F+2-3,PCES 1E+1F
HAVE CRUDE SMEC-COATED FRACTURES AT 30 DEGREES TO
CORE AXIS,PCE 3 HAS LONGITUDINAL SMEC-LINED FRACTURE
THE LENGTH OF THE PCE,LOWER HALF OF PCE 3 HAS
DISCONTINUOUS HORIZONTAL ECHELON CALCITE-FILLED
FRACTURES(0.2-0.5MM THICK) SPACED 1-2CM APART
(CONTRACTION GASHES?);
Alteration : EXT
RELATIVELY FRESH BLACK PATCHES OCCUR IN ALTERED
MATERIAL;
Comments : CONTINUATION OF FLOW UNIT 4,BLACK PATCHES FOUND IN
MORE COMMONLY DARK BROWNISH-GRAY TO DARK BROWN
ALTERED MATERIALS;
Vesicles : Size(mm): 1-10 Percent: 5
Location: Filling: CALCITE,ZEOL
BOTTOM OF PCE 1E & TOP OF PCE 1F,ID ZEOL
UNCERTAIN;
Replacement: CALCITE
ZEOLITE
ID ZEOL UNCERTAIN;
SMECTITE
Leg : 73 Top/Bottom Interval(mm): 0/1500 Analyst: Carman, M.
Hole: 519A Sample Midpoint (m) : 174.50
Core: 9 Top of Core Depth (m) : 171.50
Sect: 2 Top of Section Depth(m): 173.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (2-10), 1B (10-22), 1C (21-29), 1D (30-35),
1E (35-46), 1F (45-57), 1G (58-90), 1I (89-115),
1J (122-137), 1K (131-148), 1L (148-150);
Texture : APHYRIC,EVENLY COARSE-GRAINED;
Structure : SPARSE SUBHORIZONTAL DISCONTINUOUS CALCITE-FILLED
VEINS & JOINTS SPACED 5-30CM APART,PCES 1B-1H
CONTAIN ONE CONTINUOUS LONGITUDINAL SMEC-COATED
CALCITE-FILLED FRACTURE;
Alteration : MOD TO EXT
PCES 1A-1G+1L;
MOD
PCES 1H-1K;
Comments : CONTINUATION OF FLOW UNIT 4;
Vesicles : SOME PCES(AS IN PCE 1C) ARE OPEN & VUGGY;
Replacement: CALCITE
SMECTITE
Leg : 73 Top/Bottom Interval(mm): 0/1500 Analyst: Carman, M.
Hole: 519A Sample Midpoint (m) : 176.00
Core: 9 Top of Core Depth (m) : 171.50
Sect: 3 Top of Section Depth(m): 174.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (0-20), 1B (20-30), 1C (28-37), 2A (40-50),
2B (51-62), 2C (61-85), 2D (85-95), 2E (93-100),
3 (127-133), 4 (135-149);
Texture : APHYRIC,COARSE-GRAINED;
Structure : SOME SMEC-COATED CALCITE-FILLED VEINLETS;
Alteration : MOD
PCES 1A+2A-2C+2G-2H+4 & TOP OF PCE 1B;
MOD TO EXT
PCES 1C+3 & BOTTOM OF PCE 1B;
EXT
PCES 2D-2G,ALTERATION CONCENTRATED IN ZONES WITH
STRONGEST VEINING;
Comments : CONTINUATION OF FLOW UNIT 4;
Vesicles : Size(mm): 1-4 Percent: 2-3
Location: Filling: CALCITE
PCES 2G+2H;
Replacement: CALCITE
SMECTITE
Leg : 73 Top/Bottom Interval(mm): 0/1400 Analyst: Carman, M.
Hole: 519A Sample Midpoint (m) : 177.40
Core: 9 Top of Core Depth (m) : 171.50
Sect: 4 Top of Section Depth(m): 176.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1 (1-5), 2 (8-17), 3A (15-20), 3B (20-32),
3C (32-60), 3D (55-65), 3E (65-71), 3F (70-75),
3G (75-90), 3H (90-96), 3I (95-100), 3J (100-109),
3K (109-111), 4 (115-123), 5A (126-130),
5B (130-138);
Texture : APHYRIC,EVENLY COARSE-GRAINED,PCES 3K+4 FINE-GRAINED
GRADING DOWNWARD TO VERY FINE-GRAINED;
Structure : PCES 5A-5B MUCH FRACTURED;
Alteration : FRESH
MIDDLE OF PCES 3C+3G+3H+3I;
MOD
PCES 1-2+3E-3F & TOPS OF PCES 3C+3H+3I & BOTTOM OF
PCE 3D;
Comments : CONTINUATION OF FLOW UNIT 4,PCE 5A BEGINS FLOW UNIT
5,PCES 3C+3G-3I HAVE SECTIONS OF VERY DARK GREENISH-
GRAY BASALT WHILE OTHER PCES HAVE VARIOUS SHADES OF
BROWNISH-GRAY TO DARK BROWN DUE TO ALTERATION,PCES
5A-5B ARE FLOW TOP BRECCIA OF VERY FINE-GRAINED
(ALTERED) LIGHT BROWN APHYRIC BASALT FRAGMENTS IN A
CALCITE MATRIX,PCES 5A-5B GRADE DOWNWARD INTO MUCH
FRACTURED BUT NON-BRECCIATED BASALT;
Replacement: CALCITE
PCES 5A+5B;
Leg : 73 Top/Bottom Interval(mm): 0/ 800 Analyst: Carman, M.
Hole: 519A Sample Midpoint (m) : 178.30
Core: 9 Top of Core Depth (m) : 171.50
Sect: 5 Top of Section Depth(m): 177.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (1-10), 1B (10-12), 2 (14-18), 3 (21-30),
4 (32-43), 5 (45-50), 6A (51-60), 6B (60-63),
7 (66-69), 8 (71-80);
Texture : APHYRIC,PCE 8 COARSER-GRAINED THAN REST OF SECTION
WHICH IS VERY FINE-GRAINED;
Structure : PCES 2+5+7 RUBBLE OF ANGULAR CLASTS COATED WITH SMEC
& POWDERY CALCITE WHICH IS INTERPRETED AS A FRACTURE
ZONE;
Alteration : MOD
PCE 8;
EXT
PCES 1A-7;
Comments : PCE 8 BLACK,DARK BROWN BASALT,CONTINUATION OF FLOW
UNIT 5;
Phenocrysts: PLAGIOCLASE
SPARSE GLOMEROCRYSTS(MICROPHENOS?);
Replacement: SMECTITE
CALCITE
SMEC & CALCITE(POWDERY) COAT PCES 5A+5B;
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