Leg : 55 Top/Bottom Interval(mm): 0/1480 Analyst: Clague, D.
Hole: 430A Sample Midpoint (m) : 67.98
Core: 5 Top of Core Depth (m) : 66.50
Sect: 1 Top of Section Depth(m): 66.50
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (0-11), 2A (13-28), 2B (28-35), 3A (37-40),
3B (40-50), 4A (50-56), 4B (56-65), 5 (65-70),
6A (71-79), 6B (79-85), 6C (85-92), 6D (92-101),
7 (102-110), 8 (110-120), 9 (120-128), 10 (130-140),
11 (142-148);
Texture : DENSE, INTERGRANULAR TEXTURE, GRAIN SIZE <.1MM,
FLOW BANDING OR OBVIOUS XTL ORIENTATION OF PLAG
PERPENDICUALR TO CORE ORIENTATION, PCE 1 SLIGHTLY
MORE COARSE-GRAINED THAN REST OF SECTION, THIN
(<1MM) GLASS RIND WITH 2MM ALTERATION IN PCE 11,
APHYRIC;
Alteration : FRESH
VERY FRESH, NO APPRECIABLE ALTERATION;
Comments : BASALT IS DARK GRAY (2.5YR4/1), TOP OF FLOW UNIT
IS IN CORE 4/2 STARTING AT 83CM;
Vesicles :
Location: Filling: CALCITE
VERY RARE, FILLED VESICLES (3,103,114,116CM);
Groundmass : PYROXENE
PLAGIOCLASE
OLIVINE
VERY RARE, GREEN;
Phenocrysts: OLIVINE
Size(mm): 1
ALTERED, ONE PHENO AT 89CM;
PYROXENE
Size(mm): 1.5
ONE PHENO AT 125CM;
Leg : 55 Top/Bottom Interval(mm): 0/1370 Analyst: Clague, D.
Hole: 430A Sample Midpoint (m) : 69.37
Core: 5 Top of Core Depth (m) : 66.50
Sect: 2 Top of Section Depth(m): 68.00
LITHOLOGY: APHYRIC BASALT;
DESCRIPTION SAME AS CORE 5 SECTION 1, SAME FLOW
UNIT AS SECTION 1, MASSIVE BASALT;
Piece No. : PCE 1 (1-7), 2 (8-12), 3 (14-20), 4A (20-31),
4B (32-51), 5 (55-56), 6A (57-100), 6B (100-117),
6C (117-120), 6D (120-128), 6E (120-137);
Texture : APHYRIC;
Structure : MASSIVE;
Alteration : FRESH;
Leg : 55 Top/Bottom Interval(mm): 0/1500 Analyst: Clague, D.
Hole: 430A Sample Midpoint (m) : 71.00
Core: 5 Top of Core Depth (m) : 66.50
Sect: 3 Top of Section Depth(m): 69.50
LITHOLOGY: APHYRIC BASALT;
DESCRIPTION SAME AS SECTIONS 1 AND 2, SAME FLOW
UNIT AS SECTIONS 1 AND 2, MASSIVE BASALT;
Piece No. : PCE 1A (0-19), 1B (19-33), 1C (33-54), 1D (54-61),
2 (63-69), 3 (70-74), 4A (75-81), 4B (81-89),
4C (91-100), 4D (100-104), 4E (104-110),
4F (110-120), 4G (120-135), 4H (135-150);
Structure : CALCITE VEIN 2MM WIDE AT 14CM, THIN CALCITE VEINS
AT 20CM AND 98CM;
Texture : APHYRIC;
Vesicles : Size(mm): Percent: <1
Location: Filling: CALCITE
Leg : 55 Top/Bottom Interval(mm): 0/ 320 Analyst: Clague, D.
Hole: 430A Sample Midpoint (m) : 71.32
Core: 5 Top of Core Depth (m) : 66.50
Sect: 4 Top of Section Depth(m): 71.00
LITHOLOGY: APHYRIC BASALT;
DESCRIPTION SAME AS SECTIONS 1,2 AND 3;
Piece No. : PCE 1A (1-10), 1B (10-17), 1C (17-26), 1D (26-32);
Texture : APHYRIC, DENSE;
Structure : VUGS FILLED WITH CALCITE (4, 16-18,24,30CM);
Comments : COLOR DARK GRAY 2.5YR4/1;
Vesicles :
Location: Filling: CALCITE
SLIGHTLY MORE VESICULAR TOWARD BOTTOM WITH
VESICLES FLATTENED AND FILLED WITH CALCITE;
Leg : 55 Top/Bottom Interval(mm): 320/1500 Analyst: Clague, D.
Hole: 430A Sample Midpoint (m) : 72.50
Core: 5 Top of Core Depth (m) : 66.50
Sect: 4 Top of Section Depth(m): 71.32
LITHOLOGY: APHYRIC BASALT;
3-4% OL MICROPHENOS FOUND;
Piece No. : PCE 2 (35-37), 3 (39-43), 4 (45-50), 5 (50-53),
6 (55-60), 7 (60-67), 8 (68-75), 9 (77-84),
10 (85-93), 11 (95-98), 12 (100-112), 13 (110-117),
14 (118-122), 15 (123-133), 16 (135-139),
17 (140-146), 18 (147-150);
Texture : APHANITIC, VERY FINE-GRAINED, NO VISIBLE MINERALOGY
EXCEPT FOR 3-4% ALTERED OL MICROPHENOS IN PCE 2,
APHYRIC;
Structure : CALCITE VEINS AT 127CM;
Alteration : FRESH
OXIDIZED - COLOR 7.5YR3/2 IN PCE 2;
Comments : COLOR MOTTLED BUT AVERAGE 5YR3/3, FLOW CONTINUES IN
CORE 5-5 SECTION;
Vesicles : Size(mm): .5 Percent: 20
PCE 2;
Size(mm): 3-5 Percent: 15-20
Location: Filling:
Shape : IRREG
VESICLES LINED WITH GREEN/BROWN CLAYS IN PCE 10,
PARTLY FILLED WITH CALCITE 93-141CM;
Groundmass : OLIVINE ( 10%)
PYROXENE
MORE ABUNDANT THAN PLAG;
PLAGIOCLASE
Phenocrysts: OLIVINE ( 3-4%)
PCE 2, MICROPHENOS;
Replacement: IDDINGSITE
Minerals Replaced: OL
Leg : 55 Top/Bottom Interval(mm): 0/1150 Analyst: Dalrymple, G.B.
Hole: 430A Sample Midpoint (m) : 73.65
Core: 5 Top of Core Depth (m) : 66.50
Sect: 5 Top of Section Depth(m): 72.50
LITHOLOGY: APHYRIC BASALT;
DESCRIPTION SAME AS SECTION 4 BELOW 32CM;
Piece No. : PCE 1 (0-6), 2 (7-12), 3 (19-23), 4 (24-30),
5 (31-36), 6A (38-52), 6B (52-59), 6C (59-64),
7 (66-73), 8 (74-82), 9 (85-91), 10A (92-101),
10B (101-115);
Texture : APHYRIC;
Alteration : FRESH;
Vesicles :
Location: Filling: CLAY,CALCITE
VESICLES BECOME SMALLER AND PROGRESSIVELY FILLED
WITH GREEN CLAY AND CALCITE IN PCES 7-10A;
Leg : 55 Top/Bottom Interval(mm): 1150/1420 Analyst: Dalrymple, G.B.
Hole: 430A Sample Midpoint (m) : 73.92
Core: 5 Top of Core Depth (m) : 66.50
Sect: 5 Top of Section Depth(m): 73.65
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 10C (115-124), 10D (124-135), 11 (136-142);
Texture : VARIOLITIC, APHYRIC;
Structure : CALCITE FILLED VUG SURROUNDED BY GREEN CLAY AT
125CM;
Alteration : FRESH;
Comments : COLOR GRAY 2.5YR4/1;
Vesicles : Size(mm): 1-2 Percent:
Location: Filling: CALCITE,CLAY
SPARSE, GRADES UPWARD RAPIDLY IN PCES 7-10 TO
VESICULAR BASALT AS IN SECTION 4, GREEN CLAY;
Groundmass : OLIVINE ( 0%)
PLAGIOCLASE
PYROXENE
LATHS OF PYX AND PLAG;
Leg : 55 Top/Bottom Interval(mm): 0/ 370 Analyst: Clague, D.
Hole: 430A Sample Midpoint (m) : 74.37
Core: 5 Top of Core Depth (m) : 66.50
Sect: 6 Top of Section Depth(m): 74.00
LITHOLOGY: LAPHYRIC BASALT;
MASSIVE, SLIGHTLY COARSER THAN CORE 5-5 115-142CM,
BUT SAME FLOW UNIT;
Piece No. : PCE 1 (1-10), 2 (12-18), 3 (19-25), 4 (29-37);
Texture : FINE-GRAINED, INTERGRANULAR, APHYRIC;
Alteration : FRESH;
Comments : FEW VERY SMALL GLASSY AUTOLITHIC FRAGMENTS;
Vesicles : Size(mm): Percent: 0
Groundmass : OLIVINE ( 15%)
ALTERED;
FELDSPAR ( 50%)
FELD MORE ABUNDANT THAN MAFICS;
COMBINATION ( 35%)
INCLUDES PYX + OP.MINS;
Leg : 55 Top/Bottom Interval(mm): 0/1090 Analyst: Avdeiko, G.
Hole: 430A Sample Midpoint (m) : 77.09
Core: 6 Top of Core Depth (m) : 76.00
Sect: 1 Top of Section Depth(m): 76.00
LITHOLOGY: APHYRIC BASALT;
MASSIVE, SAME FLOW UNIT AS CORE 5-5;
Piece No. : PCE 1 (1-11), 2A (14-25), 2B (25-37), 3A (40-45),
3B (40-45), 4 (48-54), 5A (56-67), 5B (62-73),
5C (73-78), 6 (81-93), 7A (95-99), 7B (99-104),
8 (106-109);
Texture : MEDIUM-GRAINED, APHYRIC;
Structure : VEINS PRESENT WITH GREEN CLAY MATERIAL IN RIMS AND
CALCITE IN CENTRAL PARTS OF VEINS;
Alteration : SLIGHTLY ALTERED;
Comments : COLOR DARK GRAY 7.5YR4/0;
Vesicles : Size(mm): 2-6 Percent: 1-2
Location: Filling: CHLORITE
GREEN CLAY MATERIAL, ID UNCERTAIN FOR CHLORITE;
Size(mm): Percent: 10-15
PCE 7B;
Size(mm): Percent: 15-20
PCE 8, MORE VESICULAR TOWARDS THE BOTTOM;
Groundmass : PLAGIOCLASE ( 50%)
PYROXENE (35-40%)
LATHS OF PLAG, PLAG AND PYX ARE FRESH;
OLIVINE (10-15%)
OL SLIGHTLY ALTERED, YELLOW BROWN ZONE OF
MODERATELY ALTERED OL ON PCE 1;
Leg : 55 Top/Bottom Interval(mm): 1110/1500 Analyst: Avdeiko, G.
Hole: 430A Sample Midpoint (m) : 77.50
Core: 6 Top of Core Depth (m) : 76.00
Sect: 1 Top of Section Depth(m): 77.11
LITHOLOGY: APHYRIC BASALT;
NEW FLOW UNIT;
Piece No. : PCE 9 (111-115), 10 (116-119), 11 (121-123),
12 (124-128), 13 (130-133), 14 (135-144),
15 (146-150);
Texture : APHYRIC;
Structure : IRREGULAR VUGS UP TO 30MM;
Alteration : SLIGHTLY ALTERED;
Comments : COLOR DARK GRAY 10YR;
Vesicles : Size(mm): 5X7 Percent: 30
Location: Filling:
Shape : OVOID
CENTRAL PARTS OF VESICLES ARE EMPTY, RIMS ARE
LINED BY GREEN CLAY MATERIAL;
Groundmass : PLAGIOCLASE ( 50%)
PYROXENE (35-40%)
OLIVINE (10-15%)
OL MODERATELY ALTERED;
Leg : 55 Top/Bottom Interval(mm): 0/ 580 Analyst: Avdeiko, G.
Hole: 430A Sample Midpoint (m) : 78.08
Core: 6 Top of Core Depth (m) : 76.00
Sect: 2 Top of Section Depth(m): 77.50
LITHOLOGY: APHYRIC BASALT;
SAME FLOW UNIT AS CORE 6-1 110-150CM, SAME
DESCRIPTION AS CORE 6-1 110-150CM;
Piece No. : PCE 1 (1-8), 2 (10-12), 3 (14-22), 4 (25-31),
5 (33-37), 6 (40-48), 7 (50-58);
Texture : APHYRIC;
Alteration : SLIGHTLY ALTERED
THERE ARE DIFFERENCES IN DEGREE OF ALTERATION
FROM CORE 6-1 110-150CM;
Vesicles : VESICULAR, SIMILAR TO CORE 6-1 110-150CM;
Groundmass : NO DIFFERENCES IN DEGREE OF GNDMASS
CRYSTALLIZATION BETWEEN THIS SECTION AND
CORE 6-1 110-150CM;
Leg : 55 Top/Bottom Interval(mm): 580/1120 Analyst: Avdeiko, G.
Hole: 430A Sample Midpoint (m) : 78.62
Core: 6 Top of Core Depth (m) : 76.00
Sect: 2 Top of Section Depth(m): 78.08
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 8 (61-67), 9A (70-81), 9B (81-92), 10 (94-112);
Vesicles : Size(mm): Percent: 20-25
PCE 8;
Size(mm): TO 3 Percent: 2-3
BOTTOM OF PCE 10, TOWARDS THE BOTTOM VESICLES
ARE MORE FILLED BY CLAY MINERAL AND CALCITE;
Leg : 55 Top/Bottom Interval(mm): 1120/1480 Analyst: Avdeiko, G.
Hole: 430A Sample Midpoint (m) : 78.98
Core: 6 Top of Core Depth (m) : 76.00
Sect: 2 Top of Section Depth(m): 78.62
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 11 (113-118), 12 (120-129), 13 (132-140),
14 (142-148);
Texture : APHYRIC;
Alteration : FRESH;
Comments : COLOR DARK GRAY 7.5YR4/0;
Vesicles : Size(mm): Percent: TO 2
FILLED;
Leg : 55 Top/Bottom Interval(mm): 0/1200 Analyst: Avdeiko, G.
Hole: 430A Sample Midpoint (m) : 80.20
Core: 6 Top of Core Depth (m) : 76.00
Sect: 3 Top of Section Depth(m): 79.00
LITHOLOGY: APHYRIC BASALT;
ENTIRE SECTION REPRESENTS THE SAME FLOW UNIT BEGUN
AT CORE 6-1 111CM, SAME DESCRIPTION AS 6-2
113-148CM FOR PCES 1-8;
Piece No. : PCE 1A (0-10), 1B (11-16), 2 (17-33), 3 (34-43),
4 (45-51), 5 (53-63), 6 (66-73), 7 (76-87),
8 (90-100), 9 (101-120);
Texture : APHYRIC;
Alteration : FRESH
PCES 1-8;
EXTENSIVELY ALTERED;
PCE 9, OXIDIZED BUT THERE ARE FRESH ZONES LIKE
PCES 1-8, COLOR OF ALTERED BASALT IS DARK REDDISH
BROWN 5YR3/3, IT IS APPARENTLY OXIDIZED ZONE OF
LAVA FLOW BOTTOM;
Comments : PCE 3 REPRESENTS SMALL FRACTURE ZONE, PCE 9 ALSO
FRACTURED;
Leg : 55 Top/Bottom Interval(mm): 0/1500 Analyst: Kirkpatrick, J.
Hole: 430A Sample Midpoint (m) : 82.00
Core: 6 Top of Core Depth (m) : 76.00
Sect: 4 Top of Section Depth(m): 80.50
LITHOLOGY: APHYRIC BASALT;
THESE PCES PROBABLY COMPRISE A FLOW UNIT BELOW THAT
IN CORE 6-3 ALTHOUGH THE ROCK IS VERY SIMILAR;
Piece No. : PCE 1A (0-7), 1B (7-26), 2 (28-38), 3 (40-49),
4 (50-59), 5 (60-67), 6 (68-73), 7 (75-79),
8 (80-84), 9 (86-88), 10 (91-98), 11 (96-98),
12 (102-104), 13 (105-109), 15 (119-122),
16 (124-131), 17 (133-140);
Texture : APHYRIC, APHANITIC;
Structure : GREEN CLAY FILLED STREAKS UP TO 1.5CM LONG AND
2MM THICK IN PCE 3;
Comments : DARK GRAY 7.5YR4/0, MATERIAL RECOVERED IN BIT
AFTER PIPE WAS PULLED, PUT AT BOTTOM OF CORE 6
BECAUSE BIT JAMMED AND RECOVERY STOPPED AFTER THIS
CORE WAS TAKEN, PCES ARE PROBABLY OUT OF
STRATIGRAPHIC SEQUENCE;
Vesicles : Size(mm): TO 3 Percent:
MOST PCES HAVE A FEW WHICH ARE FILLED WITH GREEN
GRAY CLAY MATERIAL, PCE 3 HAS A LAYER OF MORE
ABUNDANT EMPTY VESICLES WITH SOME PARTLY FILLED
WITH BOTRYOIDAL GREEN CLAY;
Groundmass : PLAGIOCLASE
PYROXENE
APHANITIC, EASILY VISIBLE MAGNETITE AND ALTERATION
PRODUCTS FROM GLASS AND OL PROBABLY PRESENT;
MAGNETITE
Leg : 55 Top/Bottom Interval(mm): 1120/1500 Analyst: Kirkpatrick, J.
Hole: 430A Sample Midpoint (m) : 82.00
Core: 6 Top of Core Depth (m) : 76.00
Sect: 4 Top of Section Depth(m): 81.62
LITHOLOGY: PLAG-PYX PHYRIC BASALT;
A NEW UNIT FROM THE REST OF CORE 6-4;
Piece No. : PCE 14 (112-117), 18 (143-150);
Texture : PORPHYRITIC, PLAG-PYX PHYRIC, PLAG AND PYX IN
GLOMEROCRYSTS AND INTERGROWTHS MOSTLY ABOUT 3MM
ACROSS, APHANITIC GNDMASS;
Comments : DARK GRAY 7.5YR4/0, PCES OUT OF STRATIGRAPHIC
SEQUENCE SAME AS REST OF CORE 6-4;
Vesicles : Size(mm): 1-2 Percent:
Location: Filling: CLAY
GREEN CLAY;
Groundmass : PLAGIOCLASE ( 70%)
PYROXENE ( 5%)
OLIVINE
ALTERED OL, APHANITIC GNDMASS;
Phenocrysts: COMBINATION (15-20%)
PLAG + PYX, SUBHEDRAL, IN GLOMEROCRYSTS AND
INTERGROWTHS MOSTLY ABOUT 3MM ACROSS;
Leg : 55 Top/Bottom Interval(mm): 0/ 240 Analyst: Kirkpatrick, J.
Hole: 430A Sample Midpoint (m) : 114.24
Core: 10 Top of Core Depth (m) : 114.00
Sect: CC Top of Section Depth(m): 114.10
LITHOLOGY: DRILLING BRECCIA;
Texture : FINE-GRAINED 0-8CM MEDIUM-GRAINED 8-24CM;
Comments : PROBABLY A PCE OF CORE 6 MATERIAL THAT FELL INTO THE
BIT;
Leg : 55 Top/Bottom Interval(mm): 240/ 320 Analyst: Kirkpatrick, J.
Hole: 430A Sample Midpoint (m) : 114.32
Core: 10 Top of Core Depth (m) : 114.00
Sect: CC Top of Section Depth(m): 114.24
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE NO PCE NUMBER ASSIGNED - TWO PCES;
Texture : DENSE, APHYRIC;
Alteration : FRESH;
Comments : NO INDICATION OF ORIENTATION, PROBABLY A PCE OF
CORE 6 MATERIAL THAT FELL INTO THE BIT;
Vesicles : Size(mm): Percent: 0
Groundmass : PLAGIOCLASE ( 60%)
Size(mm): TO .3
PYROXENE ( 30%)
OLIVINE ( 10%)
ALL GNDMASS PHASES FRESH;
Leg : 55 Top/Bottom Interval(mm): 0/ 40 Analyst: Avdeiko, G.
Hole: 430A Sample Midpoint (m) : 117.04
Core: 11 Top of Core Depth (m) : 117.00
Sect: CC Top of Section Depth(m): 117.10
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (0-4);
Texture : FINE-GRAINED, APHYRIC;
Alteration : FRESH
ALTERED SURFACE IS LIGHT OLIVE BROWN;
Comments : COLOR BLACK 2.5Y2.5/0, PROBABLY A PCE OF THE CORE 6
MATERIAL THAT FELL INTO THE BIT;
Groundmass : PLAGIOCLASE
LATHS;
PYROXENE
OLIVINE
VERY RARE GRAINS, ALSO POSSIBLE GLASS;
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