Leg : 74 Top/Bottom Interval(mm): 0/ 990 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 474.49
Core: 39 Top of Core Depth (m) : 473.50
Sect: 1 Top of Section Depth(m): 473.50
LITHOLOGY: SEDIMENT;
Leg : 74 Top/Bottom Interval(mm): 990/1500 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 475.00
Core: 39 Top of Core Depth (m) : 473.50
Sect: 1 Top of Section Depth(m): 474.49
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1 (99-111), 2A (113-122), 2B (123-138),
2C (139-143), 2D (143-150);
Texture : PHYRIC,FINE-GRAINED,PCE 1 REPRESENTS AN UPPER
CHILLED MARGIN WITH ALT.GLAS RIND;
Structure : PCE 1 ALT.GLAS RIND IS CAPPED BY THICK PALE GREEN
CLAY.MIN VEIN,4MM WIDE SMEC VEIN BETWEEN PCES 2C &
2D;
Alteration : MOD
PCE 1 HAS ALT.GLAS RIND;
Comments : MEDIUM GRAY BASALT,PCE 1 BEGINS UNIT 1;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 10
PHENOS UP TO 10X5MM;
Replacement: CLAY MINERALS
PALE GREEN CLAY.MIN VEIN CAPS ALT.GLAS RIND ON
PCE 1;
SMECTITE
4MM WIDE SMEC VEIN BETWEEN PCES 2C & 2D;
UNIDENTIFIED
Minerals Replaced: GLASS
ALT.GLAS RIND ON PCE 1;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 476.50
Core: 39 Top of Core Depth (m) : 473.50
Sect: 2 Top of Section Depth(m): 475.00
LITHOLOGY: PLAG MOD TO SPARSELY PHYRIC BASALT;
Piece No. : PCES 1A (1-5), 1B (5-22), 1C (21-42), 1D (38-66),
1E (67-80), 1F (78-134), 1G (134-149);
Texture : PLAG PHENO ABUNDANCE VARIES DRASTICALLY FROM MOD
PHYRIC IN PCES 1A-1B+1E+1G TO ESSENTIALLY APHYRIC IN
THE LOWER TWO-THIRDS OF PCE 1F,NO CONTACTS OR
CHANGES IN GNDMASS GRAINSIZE IMMEDIATELY
DISCERNABLE,MEDIUM-GRAINED;
Structure : MAJORITY OF FRACTURES BETWEEN PCES HAVE DARK GREEN
SMEC FILLINGS & PYR LININGS;
Alteration : MOD
0-110CM;
MOD TO EXT
110-149CM;
Comments : MEDIUM GRAY BASALT,CONTINUATION OF UNIT 1;
Phenocrysts: PLAGIOCLASE ( 5-10%)
PLAG PHENO ABUNDANCE VARIES DRASTICALLY;
( 0%)
LOWER TWO-THIRDS OF PCE 1F IS ESSENTIALLY APHYRIC;
Replacement: SMECTITE
MAJORITY OF FRACTURES BETWEEN PCES HAVE DARK GREEN
SMEC FILLINGS & PYR LININGS;
Leg : 74 Top/Bottom Interval(mm): 0/1450 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 477.95
Core: 39 Top of Core Depth (m) : 473.50
Sect: 3 Top of Section Depth(m): 476.50
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1A (1-5), 1B (3-7), 1C (6-11), 1D (12-85),
1E (84-86), 1F (85-103), 1G (103-122), 1H (122-145);
Texture : PHYRIC,MEDIUM-GRAINED,SAME AS CORES 39-1 & 39-2,
LOCAL XTL LIQUID SORTING APPEARS TO HAVE TAKEN PLACE
Alteration : MOD TO EXT
Comments : MEDIUM-GRAY BASALT,CONTINUATION OF UNIT 1;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 10
Replacement: PHENOS ARE 10X5MM IN SIZE;
CLAY MINERALS
DARK GREEN CLAY.MIN MAKES UP 5% OF GNDMASS;
Leg : 74 Top/Bottom Interval(mm): 0/1450 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 479.45
Core: 39 Top of Core Depth (m) : 473.50
Sect: 4 Top of Section Depth(m): 478.00
LITHOLOGY: PLAG MOD PHYRIC TO PHYRIC BASALT;
Piece No. : PCES 1A (1-13), 1B (9-22), 1C (20-55), 1D (55-85),
1E (86-120), 1F (115-145);
Texture : MOD PHYRIC TO PHYRIC,MEDIUM-GRAINED,SAME BASALT AS
IN CORES 39-1 THRU 39-3 WITH DECREASE IN PHENO
ABUNDANCE;
Structure : NUMEROUS MEDIUM-GREEN CLAY.MIN & PYR-FILLED VEINS;
Alteration : MOD TO EXT
INTERVAL 1-42CM;
MOD
INTERVAL 42-145CM;
Comments : MEDIUM-GRAY BASALT,CONTINUATION OF UNIT 1;
Phenocrysts: PLAGIOCLASE
PLAG ABUNDANCE DECREASES FROM PREVIOUS SECTIONS;
Replacement: CLAY MINERALS
NUMEROUS MEDIUM-GREEN CLAY.MIN & PYR FILLED VEINS;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Borella, P.E.
Hole: 528 Sample Midpoint (m) : 484.50
Core: 40 Top of Core Depth (m) : 483.00
Sect: 1 Top of Section Depth(m): 483.00
LITHOLOGY: PLAG PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 1A (0-15), 1B (15-65), 1C (64-113),
1D (113-119), 1E (120-150);
Texture : PHYRIC,MEDIUM-GRAINED,NO OBSERVED GLASSY MARGINS;
Structure : MASSIVE BASALT,TWO VEINS(FILLED WITH SMEC?) ARE
PRESENT BETWEEN PCES 1A-1B & 1D-1E;
Alteration : MOD
Comments : MEDIUM-GRAY BASALT,CONTINUATION OF UNIT 1;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 10
PLAG PHENOS ARE LARGE(5X10MM);
Replacement: SMECTITE
ID SMEC UNCERTAIN-FILLS VEINS;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Borella, P.E.
Hole: 528 Sample Midpoint (m) : 486.00
Core: 40 Top of Core Depth (m) : 483.00
Sect: 2 Top of Section Depth(m): 484.50
LITHOLOGY: PLAG PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 1A (0-14), 1B (14-60), 1C (60-88), 1D (88-132),
1E (132-150);
Texture : PHYRIC,FINE-GRAINED;
Structure : SMALL VEIN LOCATED IN PCE 1D & AT THE BASE OF PCE 1D
FILLED WITH CALCITE & SMEC(?),MASSIVE BASALT;
Alteration : MOD
Comments : GRAY BASALT,CONTINUATION OF UNIT 1;
Phenocrysts: PLAGIOCLASE
OLIVINE
ID OL UNCERTAIN-DARKER GREEN PHENOS & SAME
MATERIAL IS ALSO PRESENT IN PLAG PHENOS;
Replacement: SMECTITE
ID SMEC UNCERTAIN-FOUND IN VEINS IN PCE 1D;
CALCITE
FOUND IN VEINS IN PCE 1D;
Leg : 74 Top/Bottom Interval(mm): 0/1450 Analyst: Borella, P.E.
Hole: 528 Sample Midpoint (m) : 487.45
Core: 40 Top of Core Depth (m) : 483.00
Sect: 3 Top of Section Depth(m): 486.00
LITHOLOGY: PLAG PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 1A (0-10), 1B (10-39), 1C (39-88), 1D (88-130),
1E (130-145);
Texture : PHYRIC,MEDIUM-GRAINED;
Structure : TWO SMALL VEINS(1MM) SMEC VEINS ARE LOCATED AT THE
BOTTOM OF PCES 1A+1D,MASSIVE BASALT;
Alteration : MOD
Comments : GRAY BASALT,CONTINUATION OF UNIT 1;
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): TO 10
Replacement: SMECTITE
SMALL SMEC VEINS IN PCES 1A+1D;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Borella, P.E.
Hole: 528 Sample Midpoint (m) : 489.00
Core: 40 Top of Core Depth (m) : 483.00
Sect: 4 Top of Section Depth(m): 487.50
LITHOLOGY: PLAG PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 1A (0-8), 1B (8-15), 1C (15-25), 1D (25-52),
1E (52-101), 1F (101-125), 1G (126-150);
Texture : PHYRIC,MEDIUM-GRAINED,NO GLASSY MARGINS NOTICED;
Structure : NO VEINS OBSERVED,MASSIVE BASALT;
Alteration : MOD
Comments : MEDIUM-GRAY BASALT,CONTINUATION OF UNIT 1;
Phenocrysts: PLAGIOCLASE
PHENOS ARE LARGE WITH MICROPHENOS WITHIN PHENOS;
Leg : 74 Top/Bottom Interval(mm): 0/1450 Analyst: Borella, P.E.
Hole: 528 Sample Midpoint (m) : 490.45
Core: 40 Top of Core Depth (m) : 483.00
Sect: 5 Top of Section Depth(m): 489.00
LITHOLOGY: PLAG PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 1A (0-28), 1B (21-68), 1C (69-140),
1D (140-145);
Texture : PHYRIC,MEDIUM-GRAINED,NO GLASSY MARGINS NOTICED;
Structure : VERY THIN FILLED FRACTURES,MASSIVE BASALT;
Alteration : MOD
NO ALTERATION RINDS PRESENT;
Comments : MEDIUM-GRAY BASALT,CONTINUATION OF UNIT 1;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 15
SHAPES OF PHENOS VARIABLE WITH LARGEST APPROX
5X15MM LONG;
Replacement: UNIDENTIFIED
UNIDENT.MIN FILLS THIN FRACTURES;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Borella, P.E.
Hole: 528 Sample Midpoint (m) : 492.00
Core: 40 Top of Core Depth (m) : 483.00
Sect: 6 Top of Section Depth(m): 490.50
LITHOLOGY: PLAG PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 1A (0-10), 1B (10-25), 1C (25-31), 1D (32-40),
1E (40-55), 1F (55-85), 1G (85-95), 1H (95-125),
1I (125-145), 1J (145-150);
Texture : PHYRIC,MEDIUM-GRAINED;
Structure : MASSIVE BASALT,PCE 1J FRACTURED LONGITUDINALLY,PCE
1D CONTAINS A FRACTURED FILLED VEIN;
Alteration : MOD
A LITTLE ALTERATION ZONE ACCOMPANIES VEIN IN PCE
1D;
Comments : MEDIUM-GRAY BASALT,CONTINUATION OF UNIT 1;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 15
LARGE PHENOS 8X15MM;
OLIVINE
ID OL UNCERTAIN-LARGE GREENISH-BLACK PHENOS(WHICH
ARE POSSIBLY OL) PRESENT IN PCE 1J;
Leg : 74 Top/Bottom Interval(mm): 0/ 100 Analyst: Borella, P.E.
Hole: 528 Sample Midpoint (m) : 492.10
Core: 41 Top of Core Depth (m) : 492.00
Sect: 1 Top of Section Depth(m): 492.00
LITHOLOGY: PLAG PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1A (0-10);
Texture : PHYRIC,MEDIUM-GRAINED,NO GLASS SURFACE;
Structure : MASSIVE BASALT,SMALL SMEC VEIN PRESENT;
Alteration : MOD
NO WEATHERED SURFACE;
Comments : MEDIUM-GRAY BASALT,PCE 1 ENDS UNIT 1,LACK OF GLASS
&/OR WEATHERED SURFACES SUGGESTS CONTACT BETWEEN THE
BASALT & UNDERLYING SEDIMENT IS MISSING;
Phenocrysts: PLAGIOCLASE
Replacement: SMECTITE
PRESENT IN SMALL VEIN;
Leg : 74 Top/Bottom Interval(mm): 100/ 920 Analyst: Borella, P.E.
Hole: 528 Sample Midpoint (m) : 492.92
Core: 41 Top of Core Depth (m) : 492.00
Sect: 1 Top of Section Depth(m): 492.10
LITHOLOGY: SEDIMENT;
Leg : 74 Top/Bottom Interval(mm): 920/1500 Analyst: Borella, P.E.
Hole: 528 Sample Midpoint (m) : 493.50
Core: 41 Top of Core Depth (m) : 492.00
Sect: 1 Top of Section Depth(m): 492.92
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 2A (92-94), 2B (96-99), 2C (100-103),
2D (104-106), 2E (107-110), 2F (112-115),
2G (116-120), 3A (122-126), 3B (127-129),
3C (129-130), 4A (133-141), 4B (142-145),
4C (146-149);
Texture : APHYRIC,PCES 2A+4B-4C HAVE WEATHERED GLASSY RINDS &
PCES 4B+4C REPRESENT CONTACT WITH UNDERLYING
SEDIMENT,FINE-GRAINED;
Structure : PCE 2E HAS CALCITE VEIN ON EXTERIOR;
Alteration : MOD TO EXT
PCES 2A+4B-4C HAVE ALT.GLAS RINDS;
Comments : GRAY BASALT,PCE 2A BEGINS UNIT 2,PCES 4B+4C HAVE
CALCAREOUS MUDSTONE ON ONE SIDE;
Vesicles :
Location: Filling: CALCITE,PYR
SOME VESICLES(VUGS) ARE PRESENT WITH CALCITE & PYR
XTLS PARTIALLY FILLING THE VOIDS;
Replacement: CALCITE
FILLS VEIN ON PCE 2E,XTLS PARTIALLY FILLS VESICLES
(VUGS)-ESPECIALLY IN PCES 4B-4C;
FOUND IN PCES 2D+2G,XTLS PARTIALLY FILLS VESICLES
(VUGS)-ESPECIALLY IN PCES 4B-4C;
UNIDENTIFIED
Minerals Replaced: GLASS
ALT.GLAS RINDS ON PCES 2A+4B-4C;
Leg : 74 Top/Bottom Interval(mm): 0/ 250 Analyst: Futterer, D.
Hole: 528 Sample Midpoint (m) : 493.75
Core: 41 Top of Core Depth (m) : 492.00
Sect: 2 Top of Section Depth(m): 493.50
LITHOLOGY: SEDIMENT;
Leg : 74 Top/Bottom Interval(mm): 250/1500 Analyst: Futterer, D.
Hole: 528 Sample Midpoint (m) : 495.00
Core: 41 Top of Core Depth (m) : 492.00
Sect: 2 Top of Section Depth(m): 493.75
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (26-28), 1B (26-30), 1C (29-36),
2A (39-40), 2B (39-47), 3A (50-52), 3B (54-59),
4 (61-66), 5A (68-72), 5B (72-74), 5C (75-77),
5D (78-84), 6 (85-92), 7 (94-140), 8 (143-148);
Texture : APHYRIC,FINE-GRAINED,NO GLASSY MARGINS;
Alteration : MOD TO EXT
PCES 1A-6+8;
EXT
PCE 7 IS HIGHLY WEATHERED & CRUMBLY;
Comments : GRAY BASALT,BOTTOM OF PCE 7 MAY HAVE WASHED AWAY,
RECOVERY WAS LOW,NO WEATHERED RINDS NOTICED
SUGGESTING CONTACTS WERE WASHED OUT,PCE 8 MAY
REPRESENT BEGINNING OF ANOTHER SUBUNIT,
CONTINUATION OF UNIT 2;
Vesicles : SMALL VESICLES NOTED IN SOME PCES,VESICLE
ABUNDANCE INCREASES TO A MAXIMUM IN PCE 7;
Leg : 74 Top/Bottom Interval(mm): 0/1450 Analyst: Borella, P.E.
Hole: 528 Sample Midpoint (m) : 502.45
Core: 42 Top of Core Depth (m) : 501.00
Sect: 1 Top of Section Depth(m): 501.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (0-9), 1B (9-22), 1C (23-33), 1D (33-40),
1E (40-50), 1F (52-60), 1G (60-66), 1H (65-71),
1I (72-89), 1J (78-89), 1K (89-95), 1L (95-101),
1M (101-105), 1N (105-110), 1O (110-117),
1P (117-143);
Texture : APHYRIC,FINE-GRAINED;
Structure : VOIDS SOMETIMES PARTIALLY FILLED WITH CALCITE & PYR;
Alteration : MOD TO EXT
Comments : MEDIUM-GRAY BASALT,PCE 1P ENDS UNIT 2;
Vesicles :
Location: Filling: CALCITE,PYR
VESICLES SOMETIMES PARTIALLY FILLED WITH CALCITE &
PYR,VESICLES COMPLETELY FILLED WITH SMEC;
Replacement: CALCITE
CALCITE & PYR SOMETIMES PARTIALLY FILL VESICLES &
VOIDS;
SMECTITE
FILLS VESICLES;
Leg : 74 Top/Bottom Interval(mm): 0/1100 Analyst: Borella, P.E.
Hole: 528 Sample Midpoint (m) : 503.60
Core: 42 Top of Core Depth (m) : 501.00
Sect: 2 Top of Section Depth(m): 502.50
LITHOLOGY: SEDIMENT;
LIMESTONE;
Leg : 74 Top/Bottom Interval(mm): 1100/1500 Analyst: Borella, P.E.
Hole: 528 Sample Midpoint (m) : 504.00
Core: 42 Top of Core Depth (m) : 501.00
Sect: 2 Top of Section Depth(m): 503.60
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1 (110-115), 2A (117-137), 2B (137-147);
Texture : PHYRIC,MEDIUM-GRAINED;
Structure : LARGE CALCITE & SMEC-FILLED VEIN IN PCE 2A;
Alteration : MOD
PCE 1 HAS WEATHERED RIND(SMEC);
Comments : MEDIUM GRAY BASALT,PCE 1 BEGINS UNIT 3;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 10
PLAG XTLS ARE 5X10MM;
Replacement: SMECTITE
CALCITE
CALCITE & SMEC FILL VEIN IN PCE 2A,SMEC RIND ON
PCE 1;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Borella, P.E.
Hole: 528 Sample Midpoint (m) : 505.50
Core: 42 Top of Core Depth (m) : 501.00
Sect: 3 Top of Section Depth(m): 504.00
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1A (0-7), 1B (7-13), 1C (13-17), 1D (18-35),
1E (35-50), 1F (50-78), 1G (78-83), 1H (84-97),
1I (97-104), 1J (102-112), 1K (113-120),
1L (120-135), 1M (135-146);
Texture : PHYRIC,MEDIUM-GRAINED;
Structure : VEINS CONTAIN A DARK CLAY.MIN & PYR,PCE 1L HAS VEIN
WITH AN ALTERED ZONE;
Alteration : MOD
ALTERED ZONE ASSOCIATED WITH VEIN IN PCE 1L;
Comments : MEDIUM-GRAY BASALT,CONTINUATION OF UNIT 3;
Vesicles :
Location: Filling: SMEC
PCE 1F HAS SMEC(?)-FILLED VESICLES;
Phenocrysts: PLAGIOCLASE
Replacement: SMECTITE
FILLS VESICLES-ID UNCERTAIN;
CLAY MINERALS
DARK CLAY.MIN & PYR IN VEINS,PYR ALSO FOUND IN PCE
1D;
Leg : 74 Top/Bottom Interval(mm): 0/1450 Analyst: Borella, P.E.
Hole: 528 Sample Midpoint (m) : 506.95
Core: 42 Top of Core Depth (m) : 501.00
Sect: 4 Top of Section Depth(m): 505.50
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1A (0-5), 1B (6-14), 1C (15-27), 1D (26-37),
1E (39-47), 1F (47-50), 2A (52-60), 2B (60-71),
2C (72-76), 2D (76-88), 2E (88-99), 3A (101-106),
3B (106-115), 3C (116-126), 3D (129-134),
3E (134-145);
Texture : PHYRIC,MEDIUM-GRAINED;
Structure : VEINS PRESENT AT THE TOP & ARE FILLED WITH DARK
GREEN SMEC & PYR,FRACTURES BECOME MORE EVIDENT &
NUMEROUS DOWNWARD FROM PCE 2D TO PCE 3E & MOST
APPEAR TO BE VERTICAL TO SUBVERTICAL;
Alteration : MOD
Comments : MEDIUM-GRAY BASALT,CONTINUATION OF UNIT 3;
Phenocrysts: PLAGIOCLASE
Replacement: SMECTITE
SMEC & PYR FILL VEINS,PYR FOUND SCATTERED
THROUGHOUT;
Leg : 74 Top/Bottom Interval(mm): 0/ 500 Analyst: Borella, P.E.
Hole: 528 Sample Midpoint (m) : 507.50
Core: 42 Top of Core Depth (m) : 501.00
Sect: 5 Top of Section Depth(m): 507.00
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1A (0-7), 1B (7-19), 1C (20-50);
Texture : PHYRIC,SIMILAR TEXTURE & COMPOSITION TO CORE 42-4;
Alteration : MOD
Comments : MEDIUM-GRAY BASALT,PCE 1C ENDS UNIT 3;
Phenocrysts: PLAGIOCLASE
Leg : 74 Top/Bottom Interval(mm): 0/1350 Analyst: Borella, P.E.
Hole: 528 Sample Midpoint (m) : 511.35
Core: 43 Top of Core Depth (m) : 510.00
Sect: 1 Top of Section Depth(m): 510.00
LITHOLOGY: SEDIMENT;
Leg : 74 Top/Bottom Interval(mm): 1350/1500 Analyst: Borella, P.E.
Hole: 528 Sample Midpoint (m) : 511.50
Core: 43 Top of Core Depth (m) : 510.00
Sect: 1 Top of Section Depth(m): 511.35
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCE 1 (135-150);
Texture : PHYRIC,FINE-GRAINED;
Alteration : MOD TO EXT
ALTERED RIM OCCURS AT CONTACT OF OVERLYING
SEDIMENT & BASALT;
Comments : PCE 1 BEGINS UNIT 4,MEDIUM GRAY BASALT;
Vesicles :
Location: Filling: CLAY.MIN,CALCITE
VESICLES PRESENT WITH SOME FILLED WITH CLAY.MIN,
LARGER VESICLES OR VUGS ARE FILLED WITH CALCITE
XTLS;
Phenocrysts: PLAGIOCLASE
Replacement: CLAY MINERALS
CLAY.MINS FILL SOME VESICLES;
CALCITE
LARGER VESICLES & VUGS FILLED WITH CALCITE;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Borella, P.E.
Hole: 528 Sample Midpoint (m) : 513.00
Core: 43 Top of Core Depth (m) : 510.00
Sect: 2 Top of Section Depth(m): 511.50
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1A (0-7), 1B (7-14), 1C (15-32), 1D (32-65),
1E (65-80), 1F (80-110), 1G (108-126), 1H (127-150);
Texture : PHYRIC,MEDIUM-GRAINED,PCES 1A-1C FINE-GRAINED WITH
GRAINSIZE INCREASING FROM UPPER CHILLED MARGIN FROM
CORE 43-1;
Alteration : MOD
Comments : CONTINUATION OF UNIT 4,MEDIUM-GRAY BASALT;
Vesicles :
Location: Filling: SMEC,PYR
UPPER 60CM OF CORE IS VESICULAR WITH SMEC & MINOR
PYR FILLING;
Phenocrysts: PLAGIOCLASE
Replacement: SMECTITE
SMEC & MINOR PYR FILL VESICLES;
Leg : 74 Top/Bottom Interval(mm): 0/ 950 Analyst: Borella, P.E.
Hole: 528 Sample Midpoint (m) : 513.95
Core: 43 Top of Core Depth (m) : 510.00
Sect: 3 Top of Section Depth(m): 513.00
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1A (0-21), 1B (21-54), 1C (52-85), 1D (86-95);
Texture : PHYRIC,MEDIUM-GRAINED,SAME AS CORES 43-1 & 43-2,PCE
1D HAS VERY FINE-GRAINED LOWER MARGIN REPRESENTING
BOTTOM OF COOLING UNIT;
Alteration : MOD
OL(?) & CPX(?) PHENOS ALTERED;
Comments : PCE 1D ENDS UNIT 4,MEDIUM-GRAY BASALT;
Phenocrysts: PLAGIOCLASE
OLIVINE
CLINOPYROXENE
ID OL & CPX UNCERTAIN-POSSIBLY ALTERED;
Replacement: CLAY MINERALS
Minerals Replaced: OL,CPX
GREEN CLAY.MIN POSSIBLY REPLACES OL & CPX;
Leg : 74 Top/Bottom Interval(mm): 950/1500 Analyst: Borella, P.E.
Hole: 528 Sample Midpoint (m) : 514.50
Core: 43 Top of Core Depth (m) : 510.00
Sect: 3 Top of Section Depth(m): 513.95
LITHOLOGY: SEDIMENT;
Leg : 74 Top/Bottom Interval(mm): 0/1120 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 520.12
Core: 44 Top of Core Depth (m) : 519.00
Sect: 1 Top of Section Depth(m): 519.00
LITHOLOGY: SEDIMENT;
LIMESTONE;
Leg : 74 Top/Bottom Interval(mm): 1120/1500 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 520.50
Core: 44 Top of Core Depth (m) : 519.00
Sect: 1 Top of Section Depth(m): 520.12
LITHOLOGY: PLAG MOD PHYRIC BASALT;
Piece No. : PCES 2 (113-117), 3A (119-137), 3B (137-149);
Texture : MOD PHYRIC,FINE-TO-MEDIUM-GRAINED,PCE 2 HAS ALT.GLAS
MARGIN;
Alteration : MOD TO EXT
Comments : PCE 2 BEGINS UNIT 5,MEDIUM-GRAY BASALT;
Vesicles : PCE 3B HAS CARB.UNSPEC-FILLED VUGS AT TOP & BOTTOM
WITH FACETED CALCITE XTLS & MINOR PYR;
Phenocrysts: PLAGIOCLASE
Replacement: UNIDENTIFIED
Minerals Replaced: GLASS
ALT.GLAS MARGIN;
CARBONATE
CARB.UNSPEC FILLS VUGS IN PCE 3B;
MINOR PYR FOUND IN VUGS IN PCE 3B;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 522.00
Core: 44 Top of Core Depth (m) : 519.00
Sect: 2 Top of Section Depth(m): 520.50
LITHOLOGY: PLAG MOD PHYRIC BASALT;
Piece No. : PCES 1A (2-17), 2A (19-22), 2B (19-22), 3A (25-29),
3B (29-38), 4A (39-42), 4B (43-47), 4C (43-47),
4D (47-50), 5A (52-59), 5B (60-61), 5C (60-61),
6 (63-69), 7A (72-75), 7B (76-79), 7C (79-82),
8A (84-96), 8B (96-111), 8C (111-124), 9 (125-129),
10 (130-143), 11 (145-150);
Texture : MOD PHYRIC,MEDIUM-GRAINED,SAME BASALT AS OBSERVED IN
CORE 44-1;
Alteration : MOD TO EXT
Comments : CONTINUATION OF UNIT 5,MEDIUM-GRAY BASALT;
Vesicles : SCATTERED VUGS UP TO 8X4MM LINED OR FILLED WITH
CARB.UNSPEC OR MINOR PYR;
Phenocrysts: PLAGIOCLASE
Replacement: CARBONATE
CARB.UNSPEC & MINOR PYR FILL VUGS;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 523.50
Core: 44 Top of Core Depth (m) : 519.00
Sect: 3 Top of Section Depth(m): 522.00
LITHOLOGY: PLAG MOD PHYRIC BASALT;
Piece No. : PCES 1A (0-20), 1B (20-21), 1C (22-32), 1D (32-75),
1E (76-95), 1F (95-113), 1G (113-123), 1H (123-138),
1I (138-147);
Texture : MOD PHYRIC,MEDIUM-GRAINED,SAME BASALT AS OBSERVED IN
CORES 44-1 & 44-2;
Alteration : MOD TO EXT
Comments : PCE 1I ENDS UNIT 5,MEDIUM-GRAY BASALT;
Vesicles : SCATTERED VUGS WITH CALCITE LINING,PCE 1H HAS TWO
VUGS WITH CALCITE & CHALPYR(?) LININGS;
Phenocrysts: PLAGIOCLASE
Replacement: CALCITE
CHALCOPYRITE
CALCITE LINES VUGS,CHALPYR LINES VUGS IN PCE 1H-
ID CHALPYR UNCERTAIN;
Leg : 74 Top/Bottom Interval(mm): 0/ 70 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 528.07
Core: 45 Top of Core Depth (m) : 528.00
Sect: 1 Top of Section Depth(m): 528.00
LITHOLOGY: SEDIMENT;
LIMESTONE;
Piece No. : PCE 1 (1-6);
Leg : 74 Top/Bottom Interval(mm): 70/1450 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 529.45
Core: 45 Top of Core Depth (m) : 528.00
Sect: 1 Top of Section Depth(m): 528.07
LITHOLOGY: APHYRIC TO PLAG MOD PHYRIC BASALT;
Piece No. : PCES 2A (8-11), 2B (12-15), 2C (15-18), 2D (19-22),
2E (23-25), 3A (27-29), 3B (30-32), 3C (32-37),
3D (38-40), 3E (40-44), 4A (46-51), 4B (51-56),
5A (59-70), 5B (71-77), 5C (78-91), 5D (92-105),
5E (105-106), 5F (108-113), 5G (114-115),
6A (118-136), 6B (137-145);
Texture : GRADATIONAL FROM APHYRIC TO MOD PHYRIC,FINE-TO-
MEDIUM-GRAINED;
Alteration : MOD TO EXT
Comments : PCE 2A BEGINS UNIT 6,MEDIUM-GRAY BASALT;
Vesicles : Size(mm): TO 10 Percent:
Location: Filling: CARB.UNSPEC
PCES 2A-4B ARE HIGHLY VESICULAR WITH EMPTY
VESICLES 1-10MM IN DIAMETER,NUMBER & SIZE OF
VESICLES DECREASE IN PCES 5A-5G & THEY ARE FILLED
WITH CARB.UNSPEC;
Phenocrysts: PLAGIOCLASE
Replacement: CARBONATE
CARB.UNSPEC FILLS VESICLES IN PCES 5A-5G;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 531.00
Core: 45 Top of Core Depth (m) : 528.00
Sect: 2 Top of Section Depth(m): 529.50
LITHOLOGY: PLAG MOD PHYRIC BASALT;
Piece No. : PCES 1A (0-8), 1B (10-22), 1C (20-32), 2 (34-43),
3A (45-49), 3B (45-50), 4 (52-61), 5A (63-66),
5B (67-71), 5C (71-75), 6A (80-90), 6B (91-106),
6C (106-150);
Texture : MOD PHYRIC,MEDIUM-GRAINED,SAME BASALT AS IN CORE
45-1;
Alteration : MOD TO EXT
ALTERATION CONSISTS OF SPOTS OF DARK GREEN
CLAY.MIN & PYR IN GNDMASS & ADJACENT TO SOME
PHENOS,OL/CPX PHENOS(?) ALTERED TO CLAY.MINS;
Comments : CONTINUATION OF UNIT 6,MEDIUM-GRAY BASALT;
Phenocrysts: PLAGIOCLASE
OLIVINE
CLINOPYROXENE
POSSIBLE OL/CPX PHENOS ALTERED TO GREEN CLAY.MINS
IN PCES 6B+6C;
Replacement: CLAY MINERALS
GREEN CLAY.MINS REPLACES POSSIBLE OL/CPX PHENOS IN
PCES 6B+6C,GREEN CLAY.MINS ALSO FOUND IN GNDMASS;
PYR FOUND IN GNDMASS & ADJACENT TO SOME PHENOS;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 532.50
Core: 45 Top of Core Depth (m) : 528.00
Sect: 3 Top of Section Depth(m): 531.00
LITHOLOGY: PLAG MOD PHYRIC BASALT;
Piece No. : PCES 1A (0-17), 1B (18-25), 1C (26-32), 1D (32-47),
1E (47-50), 1F (50-64), 1G (64-75), 1H (75-81),
1I (80-102), 1J (100-133), 1K (134-150);
Texture : MOD PHYRIC,MEDIUM-GRAINED,PCE 1D HAS FINE-GRAINED
LOWER END & POSSIBLY INDICATIVE OF A LOWER CHILLED
MARGIN,PCE 1E HAS FINE-GRAINED UPPER END-POSSIBLY
THE START OF ANOTHER COOLING UNIT,SAME BASALT AS IN
CORES 45-1 & 45-2;
Alteration : MOD TO EXT
PCES 1A+1I-1K;
MOD
PCES 1B-1H;
Comments : CONTINUATION OF UNIT 6,MEDIUM-GRAY BASALT;
Vesicles : VESICULAR;
Phenocrysts: PLAGIOCLASE
Leg : 74 Top/Bottom Interval(mm): 0/ 150 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 532.65
Core: 45 Top of Core Depth (m) : 528.00
Sect: 4 Top of Section Depth(m): 532.50
LITHOLOGY: PLAG MOD PHYRIC BASALT;
Piece No. : PCE 1 (1-15);
Texture : MOD PHYRIC,MEDIUM-GRAINED,SAME BASALT AS IN CORES
45-1 THRU 45-3;
Alteration : MOD TO EXT
Comments : CONTINUATION OF UNIT 6,MEDIUM-GRAY BASALT;
Phenocrysts: PLAGIOCLASE
Leg : 74 Top/Bottom Interval(mm): 0/1170 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 538.17
Core: 46 Top of Core Depth (m) : 537.00
Sect: 1 Top of Section Depth(m): 537.00
LITHOLOGY: PLAG MOD PHYRIC BASALT;
Piece No. : PCES 1A (0-4), 1B (4-17), 1C (15-30), 1D (28-36),
1E (37-44), 1F (45-52), 1G (52-60), 1H (60-68),
1I (67-76), 1J (75-88), 1K (89-108), 1L (108-117);
Texture : MOD PHYRIC,MEDIUM-GRAINED,SAME BASALT AS IN CORE 45,
PCE 1L HAS FINE-GRAINED LOWER END PROBABLY
REPRESENTING A LOWER CHILLED MARGIN OF THIS UNIT;
Alteration : MOD
Comments : MEDIUM-GRAY BASALT,PCE 1L ENDS UNIT 6;
Phenocrysts: PLAGIOCLASE
Leg : 74 Top/Bottom Interval(mm): 1170/1500 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 538.50
Core: 46 Top of Core Depth (m) : 537.00
Sect: 1 Top of Section Depth(m): 538.17
LITHOLOGY: SEDIMENT;
Leg : 74 Top/Bottom Interval(mm): 100/ 200 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 544.45
Core: 46 Top of Core Depth (m) : 537.00
Sect: CC Top of Section Depth(m): 544.35
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE NO PCE NUMBER ASSIGNED;
Texture : FINE-GRAINED,APHYRIC;
Alteration : MOD
Comments : INTERVAL 10-20 BEGINS UNIT 7,PCE IS MADE UP OF
SEVERAL FRAGMENTS,MEDIUM-GRAY BASALT;
Vesicles : Size(mm): <1 Percent:
FEW SMALL EMPTY VESICLES;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 547.50
Core: 47 Top of Core Depth (m) : 546.00
Sect: 1 Top of Section Depth(m): 546.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1 (1-11), 2A (13-17), 2B (17-20), 2C (21-23),
3A (26-42), 3B (40-52), 3C (52-54), 3D (55-60),
4 (62-65), 5A (66-74), 5B (74-88), 5C (88-90),
6 (91-99), 7 (102-109), 8A (112-129), 8B (128-131),
8C (130-135), 9 (136-150);
Texture : APHYRIC,FINE-TO-MEDIUM-GRAINED;
Structure : THIN CARB.UNSPEC & PYR STRINGERS IN PCES
3B+5A-5B+8A,CLAY.MIN VEIN IN PCE 1;
Alteration : MOD TO EXT
Comments : CONTINUATION OF UNIT 7,MEDIUM-GRAY BASALT;
Vesicles :
Location: Filling: CARB.UNSPEC
PATCHY VESICULAR,SOME VESICLES EMPTY OTHERS ARE
FILLED WITH CARB.UNSPEC;
Replacement: CARBONATE
CARB.UNSPEC IN STRINGERS IN PCES 3B+5A-5B+8A &
FILLS SOME VESICLES;
FOUND IN STRINGERS OF PCES 3B+5A-5B+8A;
CLAY MINERALS
CLAY.MIN VEIN IN PCE 1;
Leg : 74 Top/Bottom Interval(mm): 0/1500 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 549.00
Core: 47 Top of Core Depth (m) : 546.00
Sect: 2 Top of Section Depth(m): 547.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (0-12), 1B (12-17), 1C (17-25), 2A (28-31),
2B (32-35), 3A (36-42), 3B (42-50), 4 (53-64),
5A (65-70), 5B (68-89), 5C (88-117), 5D (118-122),
6A (125-127), 6B (127-150);
Texture : APHYRIC,MEDIUM-GRAINED,SAME BASALT AS IN CORE 47-1;
Structure : THIN CARB.UNSPEC STRINGERS;
Alteration : MOD TO EXT
Comments : CONTINUATION OF UNIT 7,MEDIUM-GRAY BASALT;
Vesicles : PATCHY VESICULAR;
Replacement: CARBONATE
CARB.UNSPEC STRINGERS;
Leg : 74 Top/Bottom Interval(mm): 0/ 450 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 549.45
Core: 47 Top of Core Depth (m) : 546.00
Sect: 3 Top of Section Depth(m): 549.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (0-7), 1B (5-11), 1C (10-31), 1D (31-44);
Texture : APHYRIC,MEDIUM-GRAINED;
Alteration : MOD TO EXT
Comments : MEDIUM GRAY BASALT,PCE 1D ENDS UNIT 7;
Leg : 74 Top/Bottom Interval(mm): 450/1150 Analyst: Richardson, S.H.
Hole: 528 Sample Midpoint (m) : 550.15
Core: 47 Top of Core Depth (m) : 546.00
Sect: 3 Top of Section Depth(m): 549.45
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCES 2A (45-48), 2B (48-54), 3A (58-66), 3B (67-80),
3C (80-89), 4 (91-104), 5 (105-112);
Texture : SPARSELY PHYRIC,MEDIUM-GRAINED,PCES 2A-2B HAVE VERY
FINE-GRAINED MARGINS;
Alteration : MOD TO EXT
Comments : PCES 2A-5 COMPRISE UNIT 8,PCE 5 MARKS END OF HOLE,
MEDIUM-GRAY BASALT,PCE 4 IS DRILLING RUBBLE;
Vesicles : Size(mm): TO 8 Percent:
PCES 2A-2B HAVE A FEW LARGE VESICLES 8X4MM;
Phenocrysts: PLAGIOCLASE
SPARSE;
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