Leg : 6 Top/Bottom Interval(mm): 590/ 750 Analyst:
Hole: 54 Sample Midpoint (m) : 292.75
Core: 8 Top of Core Depth (m) : 292.00
Sect: 1 Top of Section Depth(m): 292.59
LITHOLOGY: BASALT;
Piece No. : PCE 1 (59-66), 2 (66-70), 3 (70-75);
Texture : BRECCIA, ANGULAR PCES OF BLACK GLASS IN WHITE TO
PINKISH MATRIX, MORE COARSE-GRAINED THAN SITE 53,
GLASS FRAGMENTS TEND TO BE ELONGATED AND RANGE FROM
SAND-SIZE TO PEBBLES (3CM), MOST HAVE THIN
OUTER-RIMS OF PALAGONITE;
Structure : CALCITE VEINS ARE PRESENT LOCALLY;
Alteration : PALAGONITE-RIMS SEEN AND SOME PCES ARE COMPLETELY
CONVERTED TO PALAGONITE;
Comments : IN CONTACT WITH CHALK, PALAGONITE IS YELLOWISH-
BROWN AND RED-BROWN, LONG AXES OF FRAGMENTS TEND TO
ORIENT AT AN ANGLE TO THE AXIS OF THE CORE, CONTACT
WITH LOWER BASALT IS EXTREMELY IRREGULAR AND IS IN
PLACES MARKED BY A THIN RIM (5-10MM) OF BANDED,
VITREOUS BLACK GLASS, IN OTHER PLACES THIS RIM HAS
APPARENTLY BEEN ERODED AWAY AND CONTRIBUTED TO THE
OVERLYING BRECCIA, THIS CONTACT HAS BEEN OFFSET
ALONG SMALL FAULTS, BASAL PART OF BRECCIA ALONG
CONTACT CONTAINS SOME ANGULAR, VERY LARGE (8CM)
PCES OF THE UNDERLYING VESICULAR AND ALTERED
VOLCANIC ROCK;
Vesicles : SOME VERY LARGE PCES OF UNDERLYING VESICULAR ROCK
CAN BE SEEN AT BASE OF BRECCIA;
Groundmass : COMBINATION
THE WHITISH MATRIX IS COMPOSED OF VERY
FINE-GRAINED FRAGMENTS OF GLASS, CLAY MINERALS,
AND POSSIBLY VERY FINE-GRAINED ZEOLITES AND A
SMALL AMOUNT OF CARBONATE;
Replacement: CALCITE
IN VEINS;
Leg : 6 Top/Bottom Interval(mm): 750/1500 Analyst:
Hole: 54 Sample Midpoint (m) : 293.50
Core: 8 Top of Core Depth (m) : 292.00
Sect: 1 Top of Section Depth(m): 292.75
LITHOLOGY: BASALT;
ANDESITE;
Piece No. : PCE 3 (75-80), 4 (80-101), 5 (101-109), 6 (109-121),
7 (121-125), 8 (125-135), 9 (135-140), 10 (140-150);
Texture : FELTED MASS IN FINE-GRAINED MATRIX;
Structure : NUMEROUS VEINS OF SPARRY CALCITE AND WHITE
TUFFACEOUUS SEDIMENT (SAME MATERIAL AS OVERLYING
BRECCIA), MANY OF THE LATTER HAVE PALAGONITIC WALLS
IN THE COUNTRY ROCK;
Alteration : HIGHLY ALTERED, PERHAPS HYDROTHERMALLY ALTERED
OLIVINE BASALT;
Comments : COULD BE FLOW ROCK OR TUFF(?);
Vesicles : APPEARS TO BE AN AMYGDALOIDAL FLOW ROCK, IN PCES
Size(mm): THERE AR Percent: E UNF
Location: ILLED VUGG Filling: Y AREAS ALONG SOM
Shape : E VEINS;
Groundmass : PLAGIOCLASE
FELTED MASS CONSISTS OF REDDISH BROWN, PRISMATIC
PLAG, SOMETIMES ROSETTES;
Replacement: CALCITE
IN VEINS;
UNIDENTIFIED
WHITE TUFFACEOUS MATERIAL;
Leg : 6 Top/Bottom Interval(mm): 980/1460 Analyst:
Hole: 54 Sample Midpoint (m) : 294.36
Core: 9 Top of Core Depth (m) : 292.90
Sect: 1 Top of Section Depth(m): 293.88
LITHOLOGY: BASALT;
ANDESITE;
Piece No. : PCE 1 (98-110), 2 (107-111), 3 (111-126),
4 (119-124), 5 (124-134), 6 (136-140), 7 (142-146);
Texture : HOLOXTLINE, FLOW ROCK OR FRAGMENTAL ROCK, FELTED
MASS OF RADIATING PRISMATIC YELLOW-BROWN FELDSPAR
XTLS;
Structure : DENSE, CRISS CROSSING VEINS OF TWO SORTS, THIN VEINS
ENTIRELY TO PARTIALLY FILLED, SOME OCCATIONAL VOID
SPACES OCCUR, AND THICKER (UP TO 1CM) VEINS
CONTAINING WHITE TO YELLOW TUFFACEOUS MATERIAL,
SLIGHTLY CALCAREOUS;
Comments : DARK GRAY-BROWN, MATERIAL IN VEINS SEEMS TO BE A
MIXTURE OF SAND-SIZE GLASS FRAGMENTS, FRAGMENTS OF
LIGHT COLORED TUFF, FINE-GRAINED GLASS, CLAY
MINERALS AND CALCITE, MANY SHOW BANDING (I.E.
VOLCANIC ROCK, CALCITE VEIN, TUFFACEOUS MATERIAL,
CALCITE VEIN, VOLCANIC ROCK);
Groundmass : FELDSPAR
FELTED MASS OF RADIATING PRISMATIC YELLOW-BROWN
FELDSPAR XTLS IN FINE GRAINED GROUNDMASS;
Replacement: CALCITE
IN VEINS;
UNIDENTIFIED
WHITE TUFFACEOUS MATERIAL;
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