Leg : 68 Top/Bottom Interval(mm): 0/ 50 Analyst: Natland, J.
Hole: 501 Sample Midpoint (m) : 264.15
Core: 10 Top of Core Depth (m) : 264.10
Sect: 1 Top of Section Depth(m): 264.10
LITHOLOGY: SEDIMENT (LIMESTONE);
Leg : 68 Top/Bottom Interval(mm): 50/1500 Analyst: Natland, J.
Hole: 501 Sample Midpoint (m) : 265.60
Core: 10 Top of Core Depth (m) : 264.10
Sect: 1 Top of Section Depth(m): 264.15
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1 (7-15), 2 (17-19), 3 (21-25), 4 (26-35),
5 (36-43), 6 (43-50), 7 (52-59), 8 (59-65),
9 (65-72), 10 (74-80), 11 (83-85), 12 (85-93),
13 (95-98), 14 (100-103), 15 (106-113),
16 (117-124), 17 (127-133), 18 (133-140),
19 (142-149);
Texture : APHYRIC,PCE 1 HAS GLASSY RIND,PCE 7 SMALL AMOUNT OF
NEAR GLASSY MATERIAL NEAR TOP OF PCE,PCES 15+16 ARE
THE COARSEST IN THE SECTION(CENTER OF FLOW);
Structure : ABUNDANT FRACTURES,PCE 1 TWO TINY PYR VEINS,PCE 4
HAS PROMINENT CRACK FILLINGS(WHICH ARE APPARENTLY
VARIABLY OXIDIZED) SUCH AS GREEN SMEC & RED MATERIAL
& FE.HYDROX & WHITE CLAY.MIN(?),PCE 5 HAS PROMINENT
GREEN SMEC-FILLED HORIZONTAL CRACK,PCE 7 HAS SMEC-
FILLED IRREGULAR CRACK,PCE 10 HAS OLIVE(5Y5/4)
SECONDARY MINERALS(CLAY & FE.OX) ON SURFACE,PCE 12
HAS GREEN SMEC-FILLED 1-2MM CRACK INSIDE WITH
REDDISH FE.OX ON OUTER FRACTURE,PCE 15 REDDISH
MATERIAL IN CRACK SMEC & HAS PATCHES OF CELAD(?) IN
ROCK;
Alteration : MOD
Phenocrysts: PLAGIOCLASE
MICROPHENOS IN NEAR-GLASSY PCES BUT NO PHENOS
VISIBLE IN COARSER ROCKS;
Replacement: CLAY
WHITE;
SMECTITE
GREEN;
FERROUS MN OXIDE
REDDISH,POSSIBLY GOETHITE;
FERROUS MN OXIDE
HYDROX;
CELADONITE
ID CELAD UNCERTAIN;
PCE 1;
Leg : 68 Top/Bottom Interval(mm): 0/1250 Analyst: Pertsev, N.
Hole: 501 Sample Midpoint (m) : 266.85
Core: 10 Top of Core Depth (m) : 264.10
Sect: 2 Top of Section Depth(m): 265.60
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 20 (1-7), 21 (10-19), 22 (21-23), 23 (22-33),
24 (32-38), 25 (39-43), 26 (43-46), 27 (48-56),
28 (58-65), 29 (64-68), 30 (68-78), 31 (77-82),
32 (85-90), 33 (92-97), 34 (99-104), 35 (104-112),
36 (115-123);
Texture : APHYRIC OR MICROPHYRIC BASALT,PCES 20+21+33 HAVE
GLASSY MARGINS,UNIFORM COMPOSITION,ROCK APPEARS
HOLOXTLLINE;
Structure : SMEC-FILLED CRACKS WITH FE.HYDROX,PCE 23 HAS CRACK
WITH REDDISH FE.HYDROX WHICH CROSS-CUTS CRACK WITH
GREEN SMEC, PCES (20,21,33) BRECCIATED;
Alteration : SLIGHTLY TO MOD
PCES 20-21+33 BADLY ALTERED TO SMEC,AMONG
MICROPHENOS THERE ARE PSEUDOMORPHS OF SMEC
PROBABLY AFTER OL(TO 1%),PCE 30 SHOWS COLOR
ZONALITY OF WEATHERING(ESPECIALLY WHEN WET);
Comments : GRAY BASALT;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 0.5
MICROPHENOS;
Groundmass : PLAGIOCLASE
CLINOPYROXENE
GNDMASS MINERALS FRESH;
Replacement: SMECTITE ( TO 1%)
Minerals Replaced: OL
PSEUDOMORPHS PROBABLY AFTER OL;
FERROUS HYDROX MINS
HYDROX,REDDISH;
Leg : 68 Top/Bottom Interval(mm): 0/1400 Analyst: Pertsev, N.
Hole: 501 Sample Midpoint (m) : 268.70
Core: 11 Top of Core Depth (m) : 267.30
Sect: 1 Top of Section Depth(m): 267.30
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 37 (2-6), 38 (9-18), 39 (20-30), 40 (30-40),
41 (31-41), 42 (43-46), 43 (46-48), 44 (51-55),
45 (57-61), 46 (62-66), 47 (70-77), 48 (79-86),
49 (89-96), 50 (97-103), 51 (104-110), 52 (107-112),
53 (112-115), 54 (117-124), 55 (123-131),
56 (131-137);
Texture : SAME ROCK AS CORES 10-1 & 10-2,APHYRIC(MICROPHYRIC),
PCES 37+42+48-49 HAVE GLASSY MARGINS,PCES 50-56 ARE
UNIFORM IN TEXTURE & COMPOSITION & PROBABLY
HOLOXTLLINE;
Structure : THIN CRACKS FILLED WITH CLAY.MINS FROM COLORLESS TO
OLIVE GREEN & BRIGHT GREEN & RED IN COLOR,MASSIVE;
Alteration : MOD
OL PHENOS REPLACED BY CLAY.MINS,PCES 50-56
ALTERATION APPEARS TO BE DEVELOPED IN SMEC
(&/OR CELAD) REPLACEMENT OF OL,PLAG & CPX & MAGN
ARE FRESH;
Phenocrysts: OLIVINE
Size(mm): TO 1
REPLACED BY CLAY.MINS(SMEC & POSSIBLY BRIGHT GREEN
CELAD);
Groundmass : PLAGIOCLASE
CLINOPYROXENE
MAGNETITE
Replacement: SMECTITE
CELADONITE
FERROUS HYDROX MINS
HYDROX;
CLAY
Minerals Replaced: OL
CLAY.MINS FROM COLORLESS TO OLIVE GREEN & BRIGHT
GREEN & RED IN COLOR;
Leg : 68 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 501 Sample Midpoint (m) : 270.30
Core: 11 Top of Core Depth (m) : 267.30
Sect: 2 Top of Section Depth(m): 268.80
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 57 (1-10), 58 (11-22), 59 (20-28), 60 (30-34),
61 (36-39), 62 (42-47), 63 (50-60), 64 (60-67),
65 (70-73), 66 (75-84), 67 (85-92), 68 (94-98),
70 (96-102), 71 (105-112), 72 (115-122),
73 (124-133), 74 (135-146);
Texture : SAME AS CORE 11-1,NO GLASS MARGINS,UNIFORMLY FINE-TO
-MEDIUM-GRAINED,HOLOXTLLINE;
Structure : CRACKS PROMINENT IN PCES 57-60+64 & FILLED WITH
BROWNISH-RED SMEC OR CELAD & CONTAMINATED WITH
HYDROFERRIC OXIDES,THIN VEINS OF LIGHT GREEN SMEC,
DARK GREEN VEINS ARE OLDER THAN RED ONES;
Alteration : MOD
OL XTLS REPLACED BY SMEC OR CELAD;
Comments : NO PCE 69(INADVERTENTLY SKIPPED);
Groundmass : OLIVINE
Size(mm): TO 1
REPLACED BY SMEC OR CELAD;
PLAGIOCLASE
MAGNETITE
Replacement: CELADONITE
BROWNISH-RED;
SMECTITE
BROWNISH-RED,LIGHT GREEN;
FERROUS MN OXIDE
HYDROFERRIC OXIDES;
Leg : 68 Top/Bottom Interval(mm): 0/1100 Analyst: Natland, J.
Hole: 501 Sample Midpoint (m) : 271.40
Core: 11 Top of Core Depth (m) : 267.30
Sect: 3 Top of Section Depth(m): 270.30
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 75 (3-9), 76 (12-18), 77 (18-25), 78 (25-35),
79 (32-37), 80 (38-42), 81 (42-60), 82 (60-68),
83 (68-75), 84 (75-85), 85 (85-92), 86 (92-98),
Texture : NEARLY HOLOXTLLINE,UNIFORMLY MEDIUM-GRAINED,APHYRIC;
Structure : REDDISH MATERIAL FILLS FRACTURES,CLAYS & FE.OX(?) IN
CRACKS;
Alteration : MOD
PCES 77-81 GREENISH & RED-TO-GREEN BANDS,40-60CM
A NUMBER OF DARK CLAY-FILLED PATCHES ASSOCIATED
WITH THE ALTERED BAND;
Groundmass : CLINOPYROXENE
PLAGIOCLASE
Replacement: FERROUS MN OXIDE
FE "OXYHYDRATES",REDDISH-BROWN;
CLAY
SMECTITE
Leg : 68 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 501 Sample Midpoint (m) : 274.60
Core: 12 Top of Core Depth (m) : 273.10
Sect: 1 Top of Section Depth(m): 273.10
LITHOLOGY: APHYRIC TO MICROPHYRIC BASALT;
Piece No. : PCES 88 (2-10), 89 (14-16), 90 (20-25), 91 (28-34),
92 (36-42), 93 (45-52), 94 (53-60), 95 (58-63),
96 (65-72), 97 (75-82), 98 (85-88), 99 (91-94),
100 (97-103), 101 (105-109), 102 (112-115),
103 (117-122), 104 (123-128), 105 (132-140),
106 (143-148);
Texture : APHYRIC(OR MICROPHYRIC),MICROPHYRIC ZONE NEXT TO
GLASSY MARGINS(TO 2CM),UNIFORM IN CENTRAL PARTS OF
COOLING UNITS(SEEM TO BE HOLOXTLLINE & APHYRIC),
APHANITIC,PCES 88-90+95-99;
Structure : CRACKS FILLED WITH DARK-GREEN CELAD OR SMEC OR WITH
ORANGE ORE(BROWNISH-RED CELAD WITH HYDROXIDES OR
SMEC) & LIGHT-GREEN SMEC,PCE 97 HAS REDDISH-MATERIAL
-FILLED 3MM VEIN;
Alteration : MOD
OL REPLACED BY SMEC,GLASS & MICROPHYRIC ZONE ARE
STRONGLY ALTERED;
Groundmass : CLAY
COLORLESS INCLUSIONS IN PCES 95+96;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 1
CLINOPYROXENE
Size(mm): TO 1
OLIVINE
Size(mm): TO 1
ALL ARE MICROPHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
POSSIBLY CELAD,DARK GREEN;
CELADONITE
SOME WITH HYDROXIDES,DARK GREEN,POSSIBLY SMEC,
BROWNISH-RED;
UNIDENTIFIED
PCE 97 HAS REDDISH MATERIAL IN VEIN;
Leg : 68 Top/Bottom Interval(mm): 0/1100 Analyst: Pertsev, N.
Hole: 501 Sample Midpoint (m) : 275.70
Core: 12 Top of Core Depth (m) : 273.10
Sect: 2 Top of Section Depth(m): 274.60
LITHOLOGY: APHYRIC TO MICROPHYRIC BASALT;
Piece No. : PCES 107 (2-12), 108 (12-19), 109 (21-23),
110 (26-31), 111 (32-40), 112 (40-48), 113 (48-57),
114 (57-64), 115 (65-74), 116 (78-81), 117 (84-88),
118 (88-102), 119 (102-110);
Texture : HOLOXTLLINE,FINE-GRAINED,APHYRIC,NO COOLING SELVAGES
IN THE SECTION;
Structure : CRACKS(TO 2MM THICK) FILLED WITH RED MATERIAL(SMEC
OR CELAD WITH HYDROXIDES(?)),THIN VEINS OF GREEN
SMEC,FILLING ALONG CRACKS ARE YELLOW & RED;
Alteration : MOD
UNIFORMLY ALTERED,PCE 119 DEMONSTRATES ZONATION
OF OXIDATION(UNOXIDIZED-4MM RED ZONE->5MM YELLOW
ZONE);
Comments : PCE 119 HAS 4MM RED ZONE & >5MM YELLOW ZONE,
CONTINUATION OF COOLING UNIT AT BASE OF CORE 12-1;
Replacement: SMECTITE
CELADONITE
WITH HYDROXIDES(?);
Leg : 68 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 501 Sample Midpoint (m) : 281.60
Core: 13 Top of Core Depth (m) : 280.10
Sect: 1 Top of Section Depth(m): 280.10
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 120 (1-10), 121 (12-26), 122 (28-30),
123 (30-49), 124 (49-68), 125 (68-77), 126 (78-81),
127 (83-90), 128 (90-103), 129 (103-115),
130 (112-120), 131 (120-125), 132 (125 130),
133 (129-135), 134 (139-149);
Texture : PCE 120 COOLING SELVAGE,PCES 121-134 UNIFORMLY
FINE-TO-MEDIUM GRAINED,HOLOXTLLINE;
Structure : CRACKS FILLED WITH ORANGE & RED PRODUCTS(SMEC OR
CELAD WITH HYDROXIDES) IN A ZONE OF OXIDATION;
Alteration : MOD TO EXTENSIVELY
ZONE NEXT TO GLASS STRONGLY ALTERED & REPLACED BY
SMEC,ZONE OF OXIDATION ALONG CRACKS, SYMMETRICAL -
(1) VEIN (ORANGE OR RED MATERIAL TO 3MM THICKNESS
(2) DK GRAY BASALT (1-2 CM) (3) YELLOWISH-GRAY ZONE
(0.5-1.0 CM) (4) YELLOW TO ORANGE ZONE (0.5-1.0 CM)
(5) GRAY BASALT;
Comments : GRAY TO DARK GRAY BASALT,PCE 120 PROBABLY DROPPED
DOWNHOLE;
Vesicles : Size(mm): TO 2 Percent: TO 1
Location: Filling: SMEC,CHLOR
Shape : IRREGULAR
ID UNCERTAIN FOR CHLORITE;
Phenocrysts: PLAGIOCLASE
SMALL,UNALTERED;
Replacement: SMECTITE
CHLORITE
ID CHLOR UNCERTAIN;
CELADONITE
HYDROXIDE
Leg : 68 Top/Bottom Interval(mm): 0/1400 Analyst: Pertsev, N.
Hole: 501 Sample Midpoint (m) : 283.00
Core: 13 Top of Core Depth (m) : 280.10
Sect: 2 Top of Section Depth(m): 281.60
LITHOLOGY: BASALT OR DOLERITE;
Piece No. : PCES 135 (1-7), 136 (7-24), 137 (22-36),
138 (35-46), 139 (48-57), 140 (57-66), 141 (64-74),
142 (74-84), 143 (87-103), 144 (106-115),
145 (115-122), 146 (124-136);
Texture : SAME ROCK AS IN CORE 13-1,VERY UNIFORM,FINE-TO-
MEDIUM-GRAINED BASALT OR DOLERITE;
Structure : CRACKS,PCES 144-146 CRACKS FILLED WITH CALCITE &
DARK GREEN & RED CELAD & LIGHT GREEN SMEC;
Alteration : MOD
YELLOW & ORANGE ZONES OF OXIDATION ALONG CRACKS;
Comments : SECTION GRADUALLY GRADES TO DARK GRAY ZONE;
Vesicles : Size(mm): Percent: 0
Phenocrysts: OLIVINE ( 1%)
Replacement: SMECTITE
Minerals Replaced: OL
PSEUDOMORPHS,ALSO IN CRACKS;
CALCITE
CELADONITE
DARK GREEN & RED,ID CELAD UNCERTAIN;
SMECTITE
LIGHT GREEN;
FERROUS MN OXIDE
IN OUTER PARTS OF ALTERATION ZONES;
Leg : 68 Top/Bottom Interval(mm): 0/1350 Analyst: Pertsev, N.
Hole: 501 Sample Midpoint (m) : 284.45
Core: 14 Top of Core Depth (m) : 283.10
Sect: 1 Top of Section Depth(m): 283.10
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 147 (1-8), 148 (9-18), 149 (19-26),
150 (25-43), 151 (43-61), 152 (60-65), 153 (65-78),
154 (78-86), 155 (85-98), 156 (98-104),
157 (104-120), 158 (125-128), 159 (130-133);
Texture : CONTINUATION OF ROCK AT BOTTOM OF CORE 13-2,APHYRIC,
MEDIUM-GRAINED BASALT,PCE 147 IS MICROPHYRIC FROM A
COOLING MARGIN;
Structure : CRACKS RARER THAN IN CORE 13-2,CRACKS FILLED WITH
GREEN CELAD & CALCITE;
Alteration : MOD
OL REPLACED BY SMEC,ALTERATION DECREASING DOWN
CORE,ZONATION OF ALTERATION ALONG CRACKS IS ONLY
SEEN ON A WET SURFACE;
Comments : HIGHLY PROBABLE THAT PCE 147 IS FROM A HIGHER LEVEL
& FELL DOWN HOLE;
Groundmass : OLIVINE
EUHEDRAL,FEW REPLACED BY SMEC;
Replacement: CELADONITE
GREEN;
SMECTITE
Minerals Replaced: OL
GREEN;
CALCITE
Leg : 68 Top/Bottom Interval(mm): 0/1500 Analyst: Natland, J.
Hole: 501 Sample Midpoint (m) : 286.10
Core: 14 Top of Core Depth (m) : 283.10
Sect: 2 Top of Section Depth(m): 284.60
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 160 (2-15), 161 (13-23), 162 (26-32),
163 (35-46), 164 (50-59), 165 (58-65), 166 (65-79),
167 (78-88), 168 (88-97), 169 (97-107),
170 (109-119), 171 (119-125), 172 (124-132),
173 (134-139), 174 (141-143), 175 (146-149);
Texture : GRAINSIZE DECREASES SYSTEMATICALLY THROUGH PCES
171-174,ALTERED GLASS ON TOP OF PCE 174,APHYRIC;
Structure : CRACKS FILLED WITH GREEN SMEC & REDDISH FE.OXYHYDROX
& CALCITE,MASSIVE;
Alteration : MOD
ALTERATION ZONES(0.1-1CM) NEXT TO PROMINENT CRACKS
(WIDER AT TOP OF CORE),GLASS ON TOP OF PCE 174
ALMOST TOTALLY ALTERED TO YELLOW-GREEN CLAYS,
ALTERED ZONES MORE VISIBLE ON WET SURFACES;
Comments : PCE 175 BEGINS NEXT COOLING UNIT;
Replacement: SMECTITE
GREEN;
CALCITE
FERROUS MN OXIDE
OXHYDROXIDES,REDDISH;
CLAY
YELLOW-GREEN;
Leg : 68 Top/Bottom Interval(mm): 0/1500 Analyst: Natland, J.
Hole: 501 Sample Midpoint (m) : 287.60
Core: 14 Top of Core Depth (m) : 283.10
Sect: 3 Top of Section Depth(m): 286.10
LITHOLOGY: PLAG SPARSELY TO MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 176 (3-9), 177 (12-16), 178 (19-28),
179 (32-34), 180 (37-45), 181 (48-55), 182 (58-67),
183 (71-78), 184 (81-89), 185 (91-99),
186 (101-109), 187 (110-118), 188 (121-128),
189 (143-148);
Texture : PLAG SPARSELY TO MOD PHYRIC,GLASS AT PCES 176+185
+188;
Structure : CRACKS,PILLOW;
Alteration : MOD
ALTERATION ZONE AROUND CRACK IN PCE 181, SECONDARY
MINERALS IN CRACKS AND AFTER GLASS AT "PILLOW"
Phenocrysts: RIMS;
PLAGIOCLASE
Size(mm): 2-3
VISIBLE ONLY IN FINER-GRAINED ROCKS;
Replacement: SMECTITE
Minerals Replaced: GLASS
GREEN;
FERROUS MN OXIDE
FE OXYHYDROXIDE,RED;
Leg : 68 Top/Bottom Interval(mm): 0/ 800 Analyst: Natland, J.
Hole: 501 Sample Midpoint (m) : 288.40
Core: 14 Top of Core Depth (m) : 283.10
Sect: 4 Top of Section Depth(m): 287.60
LITHOLOGY: PILLOW BASALT;
Piece No. : PCES 190 (2-11), 191 (14-22), 192 (24-35),
193 (37-43), 194 (47-52), 195 (55-61), 196 (64-71),
197 (74-79);
Texture : SEQUENCE OF RUBBLY PILLOW BASALT FRAGMENTS INCLUDING
SEVERAL GLASSY & VERY FINE-GRAINED,SOME PCES HAVE
VISIBLE SPHERULITES;
Structure : FRACTURES WITH GREEN SMEC,PILLOW BASALT;
Alteration : MOD
SMEC FROM ALT.GLAS;
Vesicles :
Location: Filling: SMEC
Shape : ROUND,IRREG
SMALL & FILLED WITH GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: GLASS
GREEN;
FERROUS MN OXIDE
PCE 191;
Comments : PCES (190,192,194) IN BAGS;
Leg : 68 Top/Bottom Interval(mm): 0/1500 Analyst: Natland, J.
Hole: 501 Sample Midpoint (m) : 293.60
Core: 15 Top of Core Depth (m) : 292.10
Sect: 1 Top of Section Depth(m): 292.10
LITHOLOGY: PLAG SPARSELY TO MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 198 (2-10), 199 (10-18), 200 (19-30),
201 (31-35), 202 (37-41), 203 (44-47), 204 (49-53),
205 (57-59), 206 (63-66), 207 (68-74), 208 (77-83),
209 (86-95), 210 (97-106), 211 (108-112),
212 (112-120), 213 (123-130), 214 (134-136),
215 (142-148);
Texture : VERY FINE-GRAINED TO GLASSY WITH SPHERULITES
(VARIOLITIC) VISIBLE ON ALMOST EVERY PCE,PLAG
SPHERULITES NEAR GLASSY RIMS,NON-VERTICAL GLASS
MARGINS ON PCES 209+212,CHILLED FLOW BOTTOM
(HORIZONTAL) ON PCE 210;
Structure : SEQUENCE PILLOWS OR THIN SHEET FLOWS,
CRACKS & FRACTURES FILLED WITH CALCITE & GREEN SMEC
REDDISH FE.OX(CLAYS?);
Alteration : MOD TO EXTENSIVELY
MOSTLY MOD ALTERATION EXCEPT FOR SOME INTENSE
ALTERATION OF GLASS,GREEN CLAYS FORM ABUNDANT
INTERSTITIAL PATCHES BETWEEN PLAG NEEDLES IN
COARSER ROCKS;
Vesicles : VESICLES IN PCE 199;
Groundmass : PLAGIOCLASE ( 5-10%)
Size(mm): 1-3
EUHEDRAL,SOME IN CLUMPS;
Replacement: CALCITE
SMECTITE
GREEN;
FERROUS MN OXIDE
REDDISH,MAYBE CLAYS;
CLAY
GREEN,REDDISH;
Leg : 68 Top/Bottom Interval(mm): 0/1450 Analyst: Natland, J.
Hole: 501 Sample Midpoint (m) : 295.05
Core: 15 Top of Core Depth (m) : 292.10
Sect: 2 Top of Section Depth(m): 293.60
LITHOLOGY: PLAG SPARSELY TO MOD PHYRIC BASALT;
Piece No. : PCES 217 (3-10), 218 (13-18), 219 (19-26),
220 (26-32), 221 (35-40), 222 (42-51), 223 (55-57),
224 (72-79), 225 (83-90), 226 (91-99),
227A (101-105), 227B (105-118), 227C (108-112),
227D (113-116), 228 (123-131), 229 (133-145);
Texture : VERY FINE-GRAINED SOME PCES WITH ALT.GLAS CHILLED
RINDS MANY WITH SPHERULITIC CLUSTERS(VARIOLITES)
VISIBLE ON ALMOST EVERY PCE,GLASSY SELVAGE;
Structure : SEQUENCE CONTINUATION OF THIN FLOWS OR SMALL PILLOWS
BEGUN IN CORE 14-4;
Alteration : MOD
INTENSE ALONG CRACKS & IN GLASS SELVAGES,CALCITE &
GREEN SMEC & REDDISH FE.OX FILL CRACKS,0.75CM
LIGHT GREEN CLAY LUMP AFTER GLASS ON PCE 223;
Vesicles :
Location: Filling: SMEC,FE.OX
GREEN SMEC & REDDISH FE.OX IN PCES 217+218;
Phenocrysts: PLAGIOCLASE
Size(mm): 1-3
RARELY 5MM,EUHEDRAL SOME SKELETAL;
Replacement: CALCITE
SMECTITE
GREEN;
FERROUS MN OXIDE
REDDISH;
CLAY
Minerals Replaced: GLASS
LIGHT GREEN LUMP;
Leg : 68 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 501 Sample Midpoint (m) : 296.60
Core: 15 Top of Core Depth (m) : 292.10
Sect: 3 Top of Section Depth(m): 295.10
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 230 (2-13), 231 (13-18), 232 (20-30),
233 (26-34), 234 (34-38), 235 (38-47), 236 (47-51),
237 (52-60), 238 (63-67), 239 (67-75), 240 (76-79),
241 (78-80), 242 (84-88), 243 (90-93), 244 (93-98),
245 (99-103), 246 (105-115), 247 (115-120),
248 (123-130), 249 (132-147);
Texture : APHANITIC,PCES 238+240-241 GLASSY MARGINS,FINE-
GRAINED ZONE NEXT TO GLASSY ZONE;
Structure : PILLOW BASALT,CRACKS FILLED WITH DARK GREEN CELAD(OR
SMEC) & CALCITE;
Alteration : MOD TO EXTENSIVELY
OL REPLACED BY SMEC,FINE-GRAINED ZONE NEXT TO
GLASSY MARGIN IS STRONGLY ALTERED,PCES 230-236 RED
CLAY-OXIDE ALTERATION,GLASS IS PARTLY FRESH;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): 1-4
UP TO 8MM;
OLIVINE ( 2%)
REPLACED BY SMEC;
PROPORTION OF PHENOS IN GLASS IS SAME AS GNDMASS;
Replacement: SMECTITE
Minerals Replaced: OL
CELADONITE
DARK GREEN,POSSIBLY SMEC;
CALCITE
Leg : 68 Top/Bottom Interval(mm): 0/ 500 Analyst: Pertsev, N.
Hole: 501 Sample Midpoint (m) : 297.10
Core: 15 Top of Core Depth (m) : 292.10
Sect: 4 Top of Section Depth(m): 296.60
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 250 (2-5), 251 (6-12), 252 (16-20),
253 (23-25), 254 (25-29), 255 (31-40), 256 (43-46);
Texture : SAME AS ROCK IN CORE 15-3,PCE 250 HAS GLASSY MARGIN;
Structure : PILLOW BASALT,CRACKS FILLED WITH GREEN SMEC;
Alteration : MOD
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): 1-4
OLIVINE ( 2%)
Size(mm): 2-3
ALTERED TO SMEC OR CELAD WITH SOME RED ALTERATION
& CALCITE;
Replacement: SMECTITE
Minerals Replaced: OL
GREENISH;
CELADONITE
Minerals Replaced: OL
CALCITE
UNIDENTIFIED
RED MATERIAL;
Leg : 68 Top/Bottom Interval(mm): 0/1450 Analyst: Pertsev, N.
Hole: 501 Sample Midpoint (m) : 302.55
Core: 16 Top of Core Depth (m) : 301.10
Sect: 1 Top of Section Depth(m): 301.10
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 257 (2-11), 258 (13-15), 259 (18-27),
260 (27-31), 261 (33-37), 262 (37-41), 263 (44-46),
264 (47-51), 265 (53-56), 266 (60-63), 267 (64-73),
268 (73-77), 269 (78-86), 270 (85-92), 271 (92-100),
272 (100-107), 273 (107-110), 274 (112-121),
275 (122-126), 276 (128-132), 277 (137-143);
Texture : NO GLASSY MARGINS;
Structure : CRACKS ARE FILLED WITH GREEN SMEC & CALCITE,PCES
269-272 CRACKS FILLED WITH LIGHT-GREEN SMEC(2-3MM
THICK);
Alteration : MOD TO EXTENSIVELY
OXIDATION ZONES ALONG CRACKS CONSISTING OF YELLOW
& BROWN OR RED MATERIAL INSTEAD OF GREEN SMEC
(CELAD) 2-3CM THICK;
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): 2-4
OLIVINE ( 2%)
Size(mm): TO 2
Replacement: SMECTITE
GREEN,LIGHT GREEN;
CALCITE
CELADONITE
Leg : 68 Top/Bottom Interval(mm): 0/ 500 Analyst: Pertsev, N.
Hole: 501 Sample Midpoint (m) : 303.10
Core: 16 Top of Core Depth (m) : 301.10
Sect: 2 Top of Section Depth(m): 302.60
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 278 (3-8), 279 (11-20), 280 (22-30),
281 (32-35), 282 (37-47);
Texture : SAME AS CORE 16-1,COOLING SELVAGES COULD BE NEAR
PCES 278-279+282;
Alteration : MOD TO EXTENSIVELY
Phenocrysts: PLAGIOCLASE
OLIVINE
Leg : 68 Top/Bottom Interval(mm): 0/1300 Analyst: Pertsev, N.
Hole: 501 Sample Midpoint (m) : 306.40
Core: 17 Top of Core Depth (m) : 305.10
Sect: 1 Top of Section Depth(m): 305.10
LITHOLOGY: OL-PLAG MOD PHYRIC BASALT;
Piece No. : PCES 283 (2-6), 284 (8-17), 285 (19-21),
286 (24-31), 287 (33-47), 288 (47-57), 289 (57-67),
290 (67-78), 291 (80-82), 292 (85-90), 293 (90-99),
294 (98-107), 295 (107-117), 296 (117-128);
Texture : HOLOXTLLINE,NO COOLING SELVAGES,APPEARS TO BE BASALT
FLOW;
Structure : CRACKS FILLED WITH LIGHT GREEN SMEC & CALCITE;
Alteration : MOD
THICK BROWN OXIDATION ZONE(TO 3CM) ALONG CRACKS;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): TO 4
OLIVINE ( 3%)
Size(mm): TO 2
ALTERED,EUHEDRAL;
Replacement: SMECTITE
LIGHT GREEN,RED;
CALCITE
CELADONITE
GREEN;
Leg : 68 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 501 Sample Midpoint (m) : 308.10
Core: 17 Top of Core Depth (m) : 305.10
Sect: 2 Top of Section Depth(m): 306.60
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
Piece No. : PCES 297 (2-7), 298 (7-14), 299 (15-21),
300 (22-27), 301 (30-40), 302 (43-49), 303 (49-56),
304 (55-61), 305 (63-70), 306 (74-84), 307 (85-93),
308 (95-101), 309 (103-110), 310 (114-121),
311 (123-132), 312 (132-138), 313 (140-148);
Texture : PCES 297-305 SPARSELY PHYRIC BASALT FLOW,CONTACT
BETWEEN PCES 306+307 NOT RECOVERED,PCE 306 IS FINER-
GRAINED THAN PCES 297-305,PCES 307-313 SPARSELY
PHYRIC BASALT GLASSY TO APHANITIC WITH NUMEROUS
GLASSY MARGINS;
Structure : CRACKS FILLED WITH CALCITE(ARAGONITE?) & GREEN CELAD
(SMEC);
Comments : PCE 306 IS END OF UNIT;
Alteration : SLIGHTLY TO MOD
MOSTLY ALONG CRACKS,FRESH OL & PLAG PRESERVED IN
THE GLASS, ALTERATION IN NEW UNIT WEAKER AND MOSTL
ALONG CRACKS;
Phenocrysts: PLAGIOCLASE
OLIVINE
FRESH PLAG & OL IN GLASS;
Replacement: CALCITE
POSSIBLY ARAGONITE;
CELADONITE
POSSIBLY SMEC;
Leg : 68 Top/Bottom Interval(mm): 0/1500 Analyst: Natland, J.
Hole: 501 Sample Midpoint (m) : 309.60
Core: 17 Top of Core Depth (m) : 305.10
Sect: 3 Top of Section Depth(m): 308.10
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 314 (2-8), 315 (8-12), 316 (14-21),
317 (21-28), 318 (30-39), 319 (40-49), 320 (51-58),
321 (58-63), 322 (63-65), 323 (67-74), 324 (77-82),
325 (85-88), 326 (90-98), 327 (100-107),
328 (109-116), 329 (118-124), 330 (124-129),
331 (131-137), 332 (141-146);
Texture : MOD PHYRIC BASALT,PCES 314+317+331 ARE GRADATIONAL
FROM COOLING UNIT BOUNDARIES(SPHERULITIC COARSENING
IN ONE DIRECTION) PROBABLY TOP OF UNITS,PCE 328 IS
BOTTOM OF COOLING UNIT,OTHER PCES VERY FINE-GRAINED;
Structure : CRACKS FILLED GREEN SMEC & FE.OX & CALCITE,
(ARAGONITE?),PILLOW BASALT;
Alteration : MOD
NO ALTERATION ZONE ALONG CRACKS,OVERALL ALTERATION
LOWER THAN IN PREVIOUS CORES,PCES 314-326+331-332
OL REPLACED BY SMEC;
Comments : SEQUENCE OF THIN FLOWS OR PILLOWS;
Vesicles :
Location: Filling: SMEC,CALCITE,
Location: Filling: FE.OX
GREEN,SMEC,RED ALTERATION MATERIAL +/- FE.OX &
CALCITE;
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): 1-3
EUHEDRAL,SOME GLOMEROCRYSTS;
OLIVINE ( 1%)
FRESH IN SEVERAL PCES ESPECIALLY PCES 327-330 &
ELSEWHERE IS REPLACED BY DARK SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
DARK,ESPECIALLY IN PCES 327-330;
CALCITE
ID CALCITE UNCERTAIN(POSSIBLY ARAGONITE);
UNIDENTIFIED
RED(+/- FE.OX);
FERROUS MN OXIDE
Leg : 68 Top/Bottom Interval(mm): 0/1500 Analyst: Natland, J.
Hole: 501 Sample Midpoint (m) : 311.60
Core: 18 Top of Core Depth (m) : 310.10
Sect: 1 Top of Section Depth(m): 310.10
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 333 (2-10), 334 (12-20), 335 (22-29),
336 (32-40), 337 (42-50), 338 (52-61), 339 (63-67),
340 (67-70), 341 (70-75), 342 (75-80), 343 (80-86),
344 (100-103), 345 (105-112), 346 (112-121),
347 (120-130), 348 (130-140), 349 (140-147);
Texture : MOD PHYRIC,ALTERED TO GLASSY RIMS ON SEVERAL PCES
INCLUDING SOME ON SIDE;
Structure : FAIRLY HIGHLY FRACTURED,ALT.MINS IN CRACKS &
ALONG FRACTURE SURFACES,THICK CLAY ZONES NEXT TO
GLASS ON PCE 333(REDDISH) & PCE 343(DARK & LIGHT
GREEN);
Alteration : MOD
MUCH OF PLAG PHENOS ALTERED TO GREEN CLAYS,GREEN
CLAYS PERVASIVE IN VESICLES & PATCHES & AFTER OL;
Comments : SEVERAL COOLING UNITS INVOLVED;
Vesicles :
Location: Filling: CLAY
GREEN CLAYS PERVASIVE;
Phenocrysts: PLAGIOCLASE ( 5-7%)
OLIVINE ( TO 1%)
MANY ALTERED TO GREEN CLAY;
Replacement: SMECTITE
GREEN;
CLAY
Minerals Replaced: OL
GREEN;
CLAY
RED(+/- FE.OX);
Leg : 68 Top/Bottom Interval(mm): 0/1450 Analyst: Natland, J.
Hole: 501 Sample Midpoint (m) : 313.05
Core: 18 Top of Core Depth (m) : 310.10
Sect: 2 Top of Section Depth(m): 311.60
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 350 (2-10), 351 (7-11), 352 (15-18),
353 (20-29), 356 (46-50);
Texture : SIMILAR TO CORE 18-1;
Structure : HIGHLY FRACTURED WITH ALT.MINS OF FRACTURE SURFACES;
Alteration : MOD
Vesicles :
Location: Filling: CLAY
GREEN;
Phenocrysts: PLAGIOCLASE ( 3%)
Size(mm): 1-3
OLIVINE ( TO 1%)
Size(mm): 1-3
Replacement: SMECTITE
GREEN;
UNIDENTIFIED
RED(+/- FE.OX);
FERROUS MN OXIDE
Leg : 68 Top/Bottom Interval(mm): 0/1450 Analyst: Natland, J.
Hole: 501 Sample Midpoint (m) : 313.05
Core: 18 Top of Core Depth (m) : 310.10
Sect: 2 Top of Section Depth(m): 311.60
LITHOLOGY: APHYRIC TO SPARSELY PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 354 (30-38), 355 (37-46), 357 (55-61),
358 (62-72), 359 (73-80), 360 (82-88), 361 (90-98),
362 (100-107), 363 (112-122), 364 (120-128),
365 (128-132);
Texture : PCE 354 APHYRIC,PCES 355-365 SPARSELY PHYRIC;
Structure : HIGHLY FRACTURED WITH ALT.MINS OF FRACTURE SURFACES;
Alteration : MOD
Vesicles :
Location: Filling: CLAY
GREEN;
Phenocrysts: PLAGIOCLASE ( TO 3%)
Size(mm): 1-3
OLIVINE ( TO 1%)
Size(mm): 1-3
Replacement: SMECTITE
GREEN;
UNIDENTIFIED
RED(+/OR FE OXYHYDROXIDE);
CLAY
GREEN;
Leg : 68 Top/Bottom Interval(mm): 0/1500 Analyst: Natland, J.
Hole: 501 Sample Midpoint (m) : 320.60
Core: 19 Top of Core Depth (m) : 319.10
Sect: 1 Top of Section Depth(m): 319.10
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 367 (2-5), 368 (5-8), 369 (10-12), 370 (14-62),
371 (64-71), 372 (75-80), 373 (82-89), 374 (92-98),
375 (102-110), 376 (113-118), 377 (120-129),
378 (131-138);
Texture : GLASS & ALT.GLAS ON MANY PCES OTHERS ARE FINE-
GRAINED;
Structure : THIN RUBBLY PILLOWS OR THIN FLOWS,GENERALLY HIGHLY
FRACTURED WITH MANY TINY IRREGULAR CRACKS;
Alteration : MOD TO EXTENSIVELY
MOST INTENSE IN GLASSY ZONES WHICH ARE VERY RUBBLY
BRECCIATED & LARGELY CONVERTED TO GREEN CLAYS,
APPARENTLY ALTERATION HAS CEMENTED PCES TOGETHER
ALLOWING BETTER RECOVERY OF THIS TYPE OF MATERIAL,
NO RED ZONES OR CALCITE;
Vesicles : Size(mm): Percent: 1-3
Location: Filling: CLAY
Phenocrysts: PLAGIOCLASE ( 5-7%)
OLIVINE ( TO 1%)
SOME SINGLE XTLS & SOME CLUMPS;
Replacement: CLAY
Minerals Replaced: GLASS
GREEN;
Leg : 68 Top/Bottom Interval(mm): 0/1500 Analyst: Natland, J.
Hole: 501 Sample Midpoint (m) : 322.10
Core: 19 Top of Core Depth (m) : 319.10
Sect: 2 Top of Section Depth(m): 320.60
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 379 (2-5), 380 (5-8), 381 (9-16), 382 (17-25),
383 (27-33), 384 (33-37), 385 (37-42), 386 (44-62),
387 (64-73), 388 (74-80), 389 (82-90), 390 (90-93),
391 (99-103), 392 (103-109), 393 (115-121),
394 (124-130), 395 (134-142), 396 (143-147);
Texture : SAME AS CORE 19-1;
Replacement: FERROUS MN OXIDE ( TR%)
FE OXYHYDROXIDES,REDDISH;
Leg : 68 Top/Bottom Interval(mm): 0/ 500 Analyst: Natland, J.
Hole: 501 Sample Midpoint (m) : 322.60
Core: 19 Top of Core Depth (m) : 319.10
Sect: 3 Top of Section Depth(m): 322.10
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 397 (2-6), 398 (10-13), 399 (15-19),
400 (21-30), 401 (33-39), 402 (43-47);
Texture : PCE 400 INCLUDES FINE BROKEN-UP SAND-SIZED BASALT
FRAGMENTS & SECONDARY MINERALS,SAME AS CORES 19-1 &
19-2;
Leg : 68 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 501 Sample Midpoint (m) : 329.60
Core: 20 Top of Core Depth (m) : 328.10
Sect: 1 Top of Section Depth(m): 328.10
LITHOLOGY: PLAG-OL-CPX SPARSELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 403 (2-8), 404 (10-15), 405 (16-22),
406 (24-28), 407 (30-33), 408 (45-42), 409 (43-50),
410 (48-53), 411 (53-60), 412 (59-65), 413 (65-71),
414 (70-77), 415 (75-84), 416 (85-92), 417 (92-95),
418 (95-100), 419 (102-110), 420 (110-115),
421 (115-127), 422 (124-132), 423 (132-142),
424 (141-150);
Texture : UNIFORM SPARSELY PHYRIC BASALT PCES 409-424,GNDMASS
FINE-GRAINED & SEEMS TO BE HOLOXTLLINE;
Structure : CRACKS FILLED WITH GREEN SMEC,PILLOW BASALT,VERY
THIN(0.9MM) CALCITE VEINS;
Alteration : MOD TO EXTENSIVELY
Comments : PCES 403-408 INTERPILLOW BRECCIA WITH FRAGMENTS OF
BASALT & GLASS(TO SEVERAL CM) CEMENTED WITH LIGHT
GREEN SMEC & DARK GREEN CELAD(?);
Vesicles : Size(mm): Percent: <1
Location: Filling: CELAD,SMEC
RARE VESICLES WITH DARK GREEN CELAD RIMS & LIGHT
GREEN SMEC CORES;
Phenocrysts: PLAGIOCLASE ( 3%)
A LITTLE LARGER THAN OL PHENOS;
OLIVINE ( 3%)
Replacement: CELADONITE
DARK GREEN,ID CELAD IN INTERPILLOW BRECCIA
UNCERTAIN;
SMECTITE
GREEN TO LIGHT GREEN;
CALCITE
Leg : 68 Top/Bottom Interval(mm): 0/1450 Analyst: Pertsev, N.
Hole: 501 Sample Midpoint (m) : 331.05
Core: 20 Top of Core Depth (m) : 328.10
Sect: 2 Top of Section Depth(m): 329.60
LITHOLOGY: OL-PLAG SPARSELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 425 (1-10), 426 (10-17), 427 (17-25),
428 (24-35), 429 (34-41), 430 (42-47), 431 (48-49),
432 (52-61), 433 (62-68), 434 (69-74), 435 (75-82),
436 (83-87), 437 (91-100), 438 (102-108),
439 (110-117), 440 (119-128), 441 (130-133),
442 (135-142);
Texture : SAME AS CORE 20-1,PCES 427+432+442 GLASSY MARGINS;
Structure : PILLOW BASALT;
Alteration : MOD TO EXTENSIVELY
PCES 430-431+433+439 STRONGLY ALTERED & MOSTLY
CONVERTED TO GREEN SMEC;
Comments : PCES 430-431+433+439 PROBABLY FROM INTERPILLOW SPACE
& BRECCIA;
Phenocrysts: OLIVINE
PLAGIOCLASE
Replacement: SMECTITE
GREEN;
Leg : 68 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 501 Sample Midpoint (m) : 332.60
Core: 20 Top of Core Depth (m) : 328.10
Sect: 3 Top of Section Depth(m): 331.10
LITHOLOGY: OL-PLAG SPARSELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 443 (1-9), 444 (9-15), 445 (16-21),
446 (23-32), 447 (32-39), 448 (39-42), 449 (44-46),
450 (45-50), 451 (52-60), 452 (62-71), 453 (72-79),
454 (81-85), 455 (87-93), 456 (94-103),
457 (105-112), 458 (114-120), 459 (119-123),
460 (125-130), 461 (132-139), 462 (140-148);
Texture : SAME AS CORE 20-1 & 20-2,SPARSELY PHYRIC,ALT.GLAS
MARGINS IN PCES 459+461;
Structure : CRACKS FILLED WITH GREEN MATERIAL(SMEC OR CELAD);
Alteration : MOD TO EXTENSIVELY
PCES 445+450+455+458 PROBABLY REPRESENT INTERPILLOW
Comments : SPACE;
Vesicles : Size(mm): TO 1 Percent: RARE
Location: Filling: SMEC
Phenocrysts: PLAGIOCLASE ( TO 3%)
Size(mm): TO 3
EUHEDRAL;
OLIVINE ( TO 3%)
Size(mm): TO 3
EUHEDRAL,REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
DARK TO LIGHT GREEN,ID SMEC UNCERTAIN IN CRACKS;
CELADONITE
ID CELAD UNCERTAIN;
Leg : 68 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 501 Sample Midpoint (m) : 334.10
Core: 20 Top of Core Depth (m) : 328.10
Sect: 4 Top of Section Depth(m): 332.60
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 463 (1-10), 464 (10-19), 465 (18-24),
466 (25-30), 467 (32-37), 468 (38-42), 469 (45-53),
470 (51-56), 471 (57-62), 472 (61-71), 473 (73-76),
474 (78-85), 475 (85-90), 476 (92-95), 477 (98-103),
478 (107-115), 479 (116-121), 480 (123-128),
481 (131-136), 482 (136-139), 483 (139-141),
484 (144-150);
Texture : SPARSELY PHYRIC BASALT,GLASSY MARGINS IN PCES 477+
481,SAME AS IN CORES 20-1 & 20-2 & 20-3;
Structure : SOME OXIDIZED MATERIAL IN SOME VEINS;
Alteration : MOD TO EXTENSIVELY
PCES 475-476 STRONGLY ALTERED;
Comments : PCES 475-476 ARE PROBABLY FROM INTERPILLOW SPACE;
Phenocrysts: PLAGIOCLASE ( 3%)
OLIVINE ( 3%)
Replacement: UNIDENTIFIED
RED OXIDIZED MATERIAL IN SOME VEINS;
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