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; |
Cite as: Deep Sea Drilling Project (1989): Archive of Core and Site/Hole Data and Photographs from the Deep Sea Drilling Project (DSDP). National Geophysical Data Center, NOAA. doi:10.7289/V54M92G2 [access date]
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