Leg : 54 Top/Bottom Interval(mm): 0/ 480 Analyst: Natland, J.
Hole: 420 Sample Midpoint (m) : 117.43
Core: 13 Top of Core Depth (m) : 109.00
Sect: CC Top of Section Depth(m): 117.05
LITHOLOGY: SEDIMENT;
Leg : 54 Top/Bottom Interval(mm): 480/ 720 Analyst: Natland, J.
Hole: 420 Sample Midpoint (m) : 117.67
Core: 13 Top of Core Depth (m) : 109.00
Sect: CC Top of Section Depth(m): 117.43
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCES 1 (50-55), 2A (56-60), 2B (58-60), 3 (62-66),
4 (67-71);
Texture : SPARSELY PHYRIC,FINE-GRAINED,SLIGHTLY COARSER GRAINE
IN PCE 4;
Structure : THIN ALTERATION VEINS IN PCE 1 TRAVERSING OUTER RIM;
Alteration : MOD
WEATHERED RIM(1-3CM) ON EACH PCE;
Comments : EXTERNAL SURFACES HAVE THIN PATCHES OF FE.OXIDE
"RUST"-COLORED MATERIAL,BASALT-SEDIMENT CONTACT MAY
NOT BE REPRESENTED BY PCE 1 BUT IS AS CLOSE TO IT AS
WE HAVE;
Vesicles : Size(mm): <2 Percent: 2-3
Location: Filling: CLAY.MINS
FILLED WITH GREEN CLAY.MINS IN ALTERED RIMS;
Phenocrysts: PLAGIOCLASE ( RARE%)
Size(mm): TO 2
RARE & FRESH PHENOS;
Replacement: CLAY MINERALS
IN VESICLES;
FERROUS OXIDE
ON EXTERNAL SURFACES;
Leg : 54 Top/Bottom Interval(mm): 0/ 770 Analyst: Natland, J.
Hole: 420 Sample Midpoint (m) : 119.27
Core: 14 Top of Core Depth (m) : 118.50
Sect: 1 Top of Section Depth(m): 118.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1 (2-7), 9 (62-66);
Texture : APHYRIC,APHANITIC TO GLASSY GNDMASS;
Alteration : FRESH
PCE 9;
MOD
PCE 1,WEATHERED RIND WITH FINE-GRAINED WHITE CRUST
WELL XTLLIZED;
Comments : SLOT FOR PCE 9 IS 10CC BOTTLE CONTAINING A SMALL
BASALT PCE & SOME BASALT CHIPS & PCE 9 IS NOT IN
PLACE;
Vesicles : Size(mm): Percent: <2
Location: Filling: CLAY.MIN,FE.OXIDE
Shape : TUBULAR
TUBULAR VESICLES IN PCE 1 THAT ARE IN A WEATHERED
RIND & CONTAIN GREEN CLAY.MINS & FE.OXIDE;
Size(mm): Percent: <5
PCE 9;
Replacement: FERROUS OXIDE
FILLS VESICLES IN PCE 1;
CLAY MINERALS
GREEN CLAY.MINS FILL VESICLES IN PCE 1;
Leg : 54 Top/Bottom Interval(mm): 0/ 770 Analyst: Natland, J.
Hole: 420 Sample Midpoint (m) : 119.27
Core: 14 Top of Core Depth (m) : 118.50
Sect: 1 Top of Section Depth(m): 118.50
LITHOLOGY: PLAG SPARSELY TO MOD PHYRIC BASALT;
Piece No. : PCES 2 (10-17), 3 (19-23), 4 (27-30), 5 (31-36),
6 (40-45), 7 (47-51);
Texture : SPARSELY TO MOD PHYRIC,APHANITIC TO FINE-GRAINED,
GLASS ON ONE EDGE OF PCE 7;
Structure : EXTERIOR SURFACES ARE FRACTURE OR JOINT SURFACES IN
SOME PCES THEY ARE PARALLEL TO RINDS,OXIDATION &
CLAY.MINS FOUND ALONG FRACTURES IN PCES 2+7;
Alteration : FRESH
PCES 4+6;
MOD
PCES 2-3+5+7,PROMINENT 1-2CM DARK GRAY WEATHERING
RINDS ON MANY PCES GENERALLY PARALLEL TO JOINTING
PERPENDICULAR TO FLAT GLASSY EDGES-RINDS ABOUT 1CM
WIDE OCCUR IN PCES 3+5;
Comments : JOINT SURFACES PARTLY COATED WITH A THIN FE.OXIDE
CRUST;
Vesicles : Size(mm): Percent: 10-20
Location: Filling: CLAY.MIN,FE.OXIDE
PCE 5 IS FILLED WITH GREEN CLAY.MINS & FE.OXIDES;
Size(mm): Percent: 10-20
PCE 6;
Location: Filling: CLAY.MIN,FE.OXIDE
Shape : TUBE,ROUNDED
PCES 2-3+7 ARE VESICULAR & CONTAIN GREEN CLAY.MINS
& FE.OXIDES & ARE TUBULAR & ROUND;
Phenocrysts: PLAGIOCLASE ( 1-5%)
Size(mm): 1-2
PCE 6;
PLAGIOCLASE ( 1-2%)
Size(mm): 1-2
PCE 5;
OLIVINE
PERHAPS A FEW WEATHERED OL;
Replacement: FERROUS OXIDE
IN VESICLES & ALTERED RIMS;
CLAY MINERALS
GREEN CLAY.MINS IN VESICLES & ALTERED RIMS;
Leg : 54 Top/Bottom Interval(mm): 0/ 770 Analyst: Natland, J.
Hole: 420 Sample Midpoint (m) : 119.27
Core: 14 Top of Core Depth (m) : 118.50
Sect: 1 Top of Section Depth(m): 118.50
LITHOLOGY: SEDIMENT-BASALT CHIP MIX;
Piece No. : PCE 10 (70-76);
Comments : PCE IS IN A 10CC BOTTLE CONTAINING A DRILLING SLURRY
OF SEDIMENTS & BASALT CHIPS,NOT IN PLACE;
Leg : 54 Top/Bottom Interval(mm): 0/ 770 Analyst: Natland, J.
Hole: 420 Sample Midpoint (m) : 119.27
Core: 14 Top of Core Depth (m) : 118.50
Sect: 1 Top of Section Depth(m): 118.50
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCE 8 (57-64);
Texture : TEXTURALLY SIMILAR TO CORE 14-1 INTERVAL 0-77,
PHYRIC;
Alteration : MOD
Vesicles : Size(mm): Percent: 10-20
Phenocrysts: PLAGIOCLASE (10-15%)
Leg : 54 Top/Bottom Interval(mm): 0/ 880 Analyst: Mattey, D.
Hole: 420 Sample Midpoint (m) : 128.88
Core: 15 Top of Core Depth (m) : 128.00
Sect: 1 Top of Section Depth(m): 128.00
LITHOLOGY: APHYRIC TO PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCES 1 (3-6), 2 (7-13), 3 (16-20), 4 (21-28),
5 (30-35), 6 (37-45), 9 (65-74), 10 (76-84);
Texture : APHYRIC TO SPARSELY PHYRIC,FINE-GRAINED,APHANITIC TO
GLASSY GNDMASS,FRESH GLASS ON ONE EDGE OF PCE 9 &
GLASS ON PCE 10;
Structure : EXTERIOR SURFACES ARE FRACTURE OR JOINT SURFACES
WHICH IN SOME PCES ARE PARALLEL TO ALTERED RINDS,
FLAT GLASSY EDGE OF PCE 9 IS PERPENDICULAR TO JOINT
SURFACES,THIN VEINS WITH BROWN CLAY.MINS &/OR CARB
IN PCES 6+9;
Alteration : MOD
PCES 1-2+4-6+9,WEATHERED RIND ON PCES 1-2+4-6 WHIC
IS ABOUT 1CM WIDE ON ALL THESE PCES EXCEPT PCE 1,
LARGE WEATHERED RIM UP TO 3CM IN PCE 9,PROMINENT
1-3CM DARK GRAY ALTERATION RINDS ON MOST PCES;
FRESH
PCES 3+10,PROMINENT 1-3CM DARK GRAY ALTERATION
RINDS ON MOST PCES;
Vesicles : Size(mm): <1 Percent: 10-20
Location: Filling: CLAY,ZEOL,FE
Shape : ROUND
PCES 1-2+6+9 VESICLES ARE FILLED WITH CLAY.MINS
EITHER GREEN-BLUE OR BROWN & RUST-COLORED FE.OXIDE
& VESICLES ARE LESS FILLED IN INNER PORTION OF PCE
1 & ARE ROUND OR TUBULAR & MAY HAVE ZEOL IN PCE 9;
Size(mm): <1 Percent: <5
Location: Filling:
Shape : TUBE,ROUND
ROUND OR TUBULAR VESICLES EMPTY IN PCE 3;
Location: Filling: CLAY.MIN,FE.OXIDE
MINERALS IN VESICLES OF PCE 5;
Phenocrysts: PLAGIOCLASE ( <2%)
Size(mm): 1-2
RARE & FRESH PHENOS IN PCES 1+3-6+9+10;
OLIVINE
ONE OL PCE FAIRLY FRESH IN PCE 3;
Groundmass : PLAGIOCLASE ( 15%)
TINY ELONGATE SKELETAL PLAG CAN FORM UP TO 15% OF
SAWED SURFACES IN HAND SAMPLE REST OF GNDMASS IS
UNRESOLVABLE;
Replacement: CLAY MINERALS
BROWN & GREEN CLAY.MINS IN THIN VEINS & VESICLES
RESPECTIVELY;
ZEOLITE
ID UNCERTAIN MAY BE PRESENT IN VESICLES OF PCE 9;
FERROUS OXIDE
RUST-COLORED OXIDES IN VESICLES
CALCITE
IN THIN VEINS OF PCES 6+9;
Leg : 54 Top/Bottom Interval(mm): 0/ 880 Analyst: Mattey, D.
Hole: 420 Sample Midpoint (m) : 128.88
Core: 15 Top of Core Depth (m) : 128.00
Sect: 1 Top of Section Depth(m): 128.00
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 7 (47-54), 8 (57-64);
Texture : PHYRIC,GLASSY SELVAGES ON TOP SIDE OF PCE 8,FINE-
GRAINED;
Alteration : MOD
DARK GRAY ALTERATION RIM(TO 1CM WIDE) ON BOTH
PCES;
Vesicles : Size(mm): Percent: 10-20
Location: Filling: CLAY.MIN,FE.OXIDE
VESICLES FILLED WITH GREEN CLAY.MINS OR FE.OXIDES;
Groundmass : PLAGIOCLASE ( 15%)
Size(mm): 1-2
TINY SKELETAL PLAG;
Phenocrysts: PLAGIOCLASE (10-15%)
XTLS ARE LONGER THAN IN PREVIOUS UNIT 14-1;
Replacement: CLAY MINERALS
GREEN CLAY.MINS IN VESICLES;
FERROUS OXIDE
IN VESICLES;
Leg : 54 Top/Bottom Interval(mm): 0/1000 Analyst: Schrader, E.L.
Hole: 420 Sample Midpoint (m) : 138.50
Core: 16 Top of Core Depth (m) : 137.50
Sect: 1 Top of Section Depth(m): 137.50
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCE 1 (1-8);
Texture : SPARSELY PHYRIC,FINE-GRAINED;
Alteration : MOD
WEATHERED RIND ON PCE 1;
Vesicles :
Location: Filling: CLAY,FE.OXIDE,PYR
VESICLES IN WEATHERED RIND ARE FILLED WITH WHITE
CRUSTS & GREEN CLAY.MINS WITH POSSIBLY SULFIDES
PRESENT,SOME ALSO FILLED WITH IRRIDESCENT FE.OXIDE
& FE-STAINED TRANSLUCENT MINERALS;
Phenocrysts: PLAGIOCLASE
Replacement: FERROUS OXIDE
IN VESICLES;
NOT CERTAIN IF SULFIDES ARE PRESENT;
CLAY MINERALS
GREEN CLAY.MINS IN VESICLES;
Leg : 54 Top/Bottom Interval(mm): 0/ 320 Analyst: Natland, J.
Hole: 420 Sample Midpoint (m) : 141.82
Core: 17 Top of Core Depth (m) : 141.50
Sect: 1 Top of Section Depth(m): 141.50
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCES 1 (2-6), 2 (8-14), 3 (18-21), 4 (25-31);
Texture : SPARSELY PHYRIC,GLASSY RIM ON PCE 1;
Structure : PATCHES OF PALE YELLOW-WHITE NON-CARBONATE MINERAL
FILLING CRACK ON ONE OF THE EXTERIOR SURFACES OF PCE
1 PROBABLY ORIGINALLY A JOINT SURFACE;
Alteration : MOD
CENTERS OF PCES ARE FRESH IN ALL BUT PCE 3,ALL
PCES ARE ALTERED ON OUTSIDE(WEATHERED RINDS 1-3CM
WIDE);
Comments : DARKER GNDMASS IN RIM OF PCE 1;
Vesicles : Size(mm): 0.5 Percent: 1-2
Location: Filling: CLAY.MIN
WHITE & GREEN CLAY.MINS FILL VESICLES IN ALTERED
RINDS BUT VESICLES ARE EMPTY ON INNER PORTION OF
THE CORE PCES WHICH ARE FRESH;
Phenocrysts: PLAGIOCLASE ( 1-2%)
PLAG PHENOS ARE RARE WITH ELONGATE OR RADIATING
CLUMPS OF TINY PLAG XTLS(<1MM) ESPECIALLY
PROMINENT IN PCE 1;
Replacement: CLAY MINERALS
GREEN & WHITE CLAY.MINS IN VESICLES;
Leg : 54 Top/Bottom Interval(mm): 0/ 250 Analyst: Natland, J.
Hole: 420 Sample Midpoint (m) : 99.75
Core: B 1 Top of Core Depth (m) : 99.50
Sect: Top of Section Depth(m): 99.50
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCES 1 (3-4), 2 (6-15), 3 (17-25);
Texture : VERY SPARSELY PHYRIC,FINE-GRAINED,PCE 1 HAS LOWER
FLAT GLASSY EDGE,APHANITIC TO GLASSY;
Structure : EXTERIOR SURFACES OF PCES ARE JOINT OR FRACTURE
SURFACES;
Alteration : MOD
ALTERATION RINDS PROMINENT ON PCES 2-3,EXTERIOR
SURFACES HAVE THIN DUSKY BROWN OXIDATION OR FE-MN
COATINGS;
Vesicles : Size(mm): 1-2 Percent: <1
Phenocrysts: PLAGIOCLASE ( RARE%)
UNRESOLVABLE IN GNDMASS;
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