Leg : 69 Top/Bottom Interval(mm): 0/ 950 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 270.95
Core: 2 Top of Core Depth (m) : 270.00
Sect: 1 Top of Section Depth(m): 270.00
LITHOLOGY: SEDIMENT;
Leg : 69 Top/Bottom Interval(mm): 950/1450 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 271.45
Core: 2 Top of Core Depth (m) : 270.00
Sect: 1 Top of Section Depth(m): 270.95
LITHOLOGY: PLAG-CPX-OL MOD PHYRIC BASALT;
Piece No. : PCES 232 (95-100), 233 (104-110), 234 (113-118),
235 (120-127), 236 (130-137), 237 (140-143);
Texture : SPARSELY PHYRIC,MICROLITIC,PCE 232 SEEMS TO HAVE THE
ZONE NEXT TO GLASS;
Structure : CRACKS FILLED WITH SMEC ABUNDANT ONLY IN PCE 232,
MANY OF THE OTHER SAMPLES HAVE SURFACES ALONG FORMER
CRACKS;
Alteration : FRESH TO SLIGHTLY
Comments : UNIT 1;
Vesicles : Size(mm): <1 Percent: RARE
Location: Filling: SMEC
LIGHT GREEN OR YELLOW OR ORANGE;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 3
CLINOPYROXENE
Size(mm): TO 3
OLIVINE
Size(mm): TO 3
ALL PHENOS TOTAL 5%;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN OR YELLOW OR ORANGE;
Leg : 69 Top/Bottom Interval(mm): 0/1450 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 279.45
Core: 3 Top of Core Depth (m) : 278.00
Sect: 1 Top of Section Depth(m): 278.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 238 (1-13), 239 (15-23), 240 (20-22),
241 (24-28), 242 (24-28), 243 (32-35), 244 (40-49),
245 (51-59), 246 (61-69), 247 (68-70), 248 (70-79),
249 (78-84), 250 (85-90), 251 (90-100),
252 (99-105), 253 (105-115), 254 (115-118),
255 (119-125), 256 (125-131), 257 (131-135),
258 (136-143), 259 (143-145);
Texture : APHYRIC,BOTTOM PCE 244 & TOP PCE 246 VARIOLITIC
TEXTURE INDICATING TOP OF A FLOW,PCE 259 HAS FINE-
GRAINED ZONE INDICATING THE BOTTOM OF A FLOW,80CM
THIN FLOW FROM PCE 246-259;
Structure : CRACKS(TO 2MM) WITH CARB IN PCES 239-240+253,LARGE
CRACKS WITH DARK GREEN PRODUCT IN PCES 251+258;
Alteration : OL REPLACED BY GREEN CLAYS;
Comments : LIGHT GRAY BASALT,CONTINUATION OF UNIT 1;
Vesicles :
Location: Filling: CLAY.MINS
SMALL,FILLED WITH YELLOW & ORANGE & RED OR GREEN
CLAYS-GENERALLY A RIM WITH YELLOW & RED CLAYS & A
CORE WITH GREEN CLAYS;
Phenocrysts: OLIVINE ( TO 1%)
REPLACED BY DARK GREEN CLAYS;
Replacement: CLAY
Minerals Replaced: OL
(EN; %)
CLAY
YELLOW & RED & ORANGE OR GREEN;
UNIDENTIFIED
DARK GREEN IN PCES 251+258;
Leg : 69 Top/Bottom Interval(mm): 10/ 300 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 279.80
Core: 3 Top of Core Depth (m) : 278.00
Sect: 2 Top of Section Depth(m): 279.51
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 260 (1-8), 261 (13-20), 262 (20-25),
263 (25-30);
Texture : APHYRIC;
Structure : PCES 262-263 LARGE CRACKS FILLED WITH DARK GREEN
PRODUCT;
Alteration : MOD
PCES 261-263,OXIDIZED ZONES;
Comments : CONTINUATION OF UNIT 1;
Vesicles :
Location: Filling: CLAY.MINS
VESICLES FILLED WITH YELLOW-ORANGE-RED &/OR GREEN
CLAY.MINS;
Location: Filling: UNIDENT
PCE 261,BIG VESICLES WITH DARK GREEN UNIDENT.MINS;
Phenocrysts: OLIVINE ( <1%)
REPLACED BY GREEN CLAYS;
Replacement: CLAY
YELLOW-ORANGE-RED &/OR GREEN;
CLAY
Minerals Replaced: OL
GREEN;
UNIDENTIFIED
DARK GREEN PRODUCT FILLS VESICLES(PCE 261) &
CRACKS(262-263);
Leg : 69 Top/Bottom Interval(mm): 10/ 200 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 280.20
Core: 4 Top of Core Depth (m) : 280.00
Sect: 1 Top of Section Depth(m): 280.01
LITHOLOGY: APHYRIC TO PLAG-OL SPARSELY PHYRIC BASALT;
Piece No. : PCES 264 (1-7), 265 (14-16), 266 (7-14),
267 (14-19);
Texture : APHYRIC TO SPARSELY PHYRIC;
Alteration : MOD
PCES 264+266,ALTERATION AS RED-ORANGE OXIDATION
RIMS;
Comments : PCES 264-267 CONTINUATION OF UNIT 1;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): 1-2
OLIVINE ( <1%)
Size(mm): TO 1
COMPLETELY REPLACED BY DARK GREEN CLAYS;
Replacement: CLAY ( <1%)
Size(mm): TO 1
Minerals Replaced: OL
Leg : 69 Top/Bottom Interval(mm): 200/ 470 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 280.47
Core: 4 Top of Core Depth (m) : 280.00
Sect: 1 Top of Section Depth(m): 280.20
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCES 268 (22-31), 269 (32-41), 270 (32-41),
271 (41-47);
Texture : MOD PHYRIC,TOP OF PCE 268 HAS VARIOLITIC TEXTURE
SUGGESTING CLOSE PROXIMITY TO GLASS MARGIN;
Comments : PCE 268 BEGINS SUBUNIT 2A;
Vesicles : Size(mm): 1-2 Percent: <1
Location: Filling: CLAY.MINS
GREEN CLAY.MIN FILLING;
Phenocrysts: PLAGIOCLASE ( 4-5%)
Size(mm): 2-3
OLIVINE ( TO 2%)
Size(mm): 1-2
COMPLETELY REPLACED;
Replacement: CLAY
GREEN;
Leg : 69 Top/Bottom Interval(mm): 490/ 900 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 280.90
Core: 4 Top of Core Depth (m) : 280.00
Sect: 1 Top of Section Depth(m): 280.49
LITHOLOGY: APHYRIC TO PLAG-OL SPARSELY PHYRIC BASALT;
Piece No. : PCES 272 (49-55), 273 (57-60), 274 (62-70),
275 (72-77), 276 (78-83), 277 (75-78), 278 (83-90);
Texture : APHYRIC TO SPARSELY PHYRIC,PCE 274 ALMOST ALL GLASS;
Structure : PCE 274 GREEN CLAY VEINS;
Comments : SUBUNIT 2A;
Phenocrysts: PLAGIOCLASE ( TR%)
Size(mm): <1
TRACE OF MICROPHENOS;
OLIVINE ( TO 1%)
Size(mm): <1
PSEUDOMORPHS;
Replacement: CLAY
GREEN IN PCE 274;
Leg : 69 Top/Bottom Interval(mm): 1000/1410 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 281.41
Core: 4 Top of Core Depth (m) : 280.00
Sect: 1 Top of Section Depth(m): 281.00
LITHOLOGY: OL-PLAG MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 279 (92-94), 280 (98-103), 281 (104-112),
282 (112-117), 283 (123-126), 284 (112-123),
285 (125-128), 286 (127-130), 287 (128-130),
288 (130-136), 289 (136-140);
Texture : MOD PHYRIC,PCE 280 SAME AS PCES 268-271,PCES
281-289 FINE-GRAINED & MAKE UP ONE PILLOW;
Structure : PILLOW BASALT;
Comments : PCES 281-289 ARE DARK GRAY;
Phenocrysts: PLAGIOCLASE ( 4-5%)
Size(mm): 2-3
OLIVINE ( 1%)
Size(mm): 1-2
Leg : 69 Top/Bottom Interval(mm): 900/1000 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 281.00
Core: 4 Top of Core Depth (m) : 280.00
Sect: 1 Top of Section Depth(m): 280.90
LITHOLOGY: SEDIMENT;
Leg : 69 Top/Bottom Interval(mm): 900/1000 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 281.00
Core: 4 Top of Core Depth (m) : 280.00
Sect: 1 Top of Section Depth(m): 280.90
LITHOLOGY: NANNOFOSSIL LIMESTONE;
Comments : PCES 279A & 279B;
Leg : 69 Top/Bottom Interval(mm): 1430/1460 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 281.46
Core: 4 Top of Core Depth (m) : 280.00
Sect: 1 Top of Section Depth(m): 281.43
LITHOLOGY: SEDIMENT;
Leg : 69 Top/Bottom Interval(mm): 1430/1460 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 281.46
Core: 4 Top of Core Depth (m) : 280.00
Sect: 1 Top of Section Depth(m): 281.43
LITHOLOGY: NANNOFOSSIL LIMESTONE;
Comments : PCES 290;
Leg : 69 Top/Bottom Interval(mm): 0/1400 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 282.90
Core: 4 Top of Core Depth (m) : 280.00
Sect: 2 Top of Section Depth(m): 281.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 291 (3-17), 292 (21-28), 293 (29-31),
294 (28-31), 295 (35-45), 296 (45-50), 297 (52-69),
298 (59-63), 299 (59-67), 300 (67-71), 301 (68-77),
302 (80-86), 303 (85-102), 304 (101-111),
305 (110-117), 306 (116-125), 307 (117-125),
308 (125-133), 309 (133-136);
Texture : MOD PHYRIC,GLASSY MARGINS ON PCES 291+292+295+302;
Structure : PILLOW BASALT,THIN MASSIVE FLOWS,CRACKS NEAR GLASSY
MARGINS & INSIDE OF FLOWS ARE FILLED WITH LIGHT
GREEN FIBROUS SMEC & CALCITE;
Alteration : MOD
OXIDATION ALONG SOME OF CRACKS IN PCES 293+305+
309;
Comments : CONTINUATION OF SUBUNIT 2A;
Vesicles : Size(mm): TO 1 Percent: <1
Location: Filling: SMEC
Phenocrysts: PLAGIOCLASE ( TO 7%)
Size(mm): TO 3
OLIVINE ( TO 2%)
Size(mm): TO 2
COMPLETELY OR PARTIALLY REPLACED BY LIGHT GREEN
SMEC;
Replacement: SMECTITE
Leg : 69 Top/Bottom Interval(mm): 0/1400 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 284.40
Core: 4 Top of Core Depth (m) : 280.00
Sect: 3 Top of Section Depth(m): 283.00
LITHOLOGY: PLAG-OL SPARSELY-TO-MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 310 (2-8), 311 (9-21), 312 (21-31),
313 (31-41), 314 (40-46), 315 (48-55), 316 (56-63),
317 (64-69), 318 (72-76), 319 (80-87), 320 (90-103),
321 (100-109), 322 (105-117), 323 (117-126),
324 (127-133), 325 (132-135), 326 (135-140);
Texture : MOD PHYRIC;
Structure : PILLOW BASALT,THIN MASSIVE FLOWS,CRACKS FILLED WITH
LIGHT GREEN SMEC & CALCITE,PATCHES OF SMALL
IRREGULAR CAVITIES FILLED WITH LIGHT GREEN SMEC IN
PCES 320-323;
Alteration : MOD
OL COMPLETELY ALTERED;
Comments : CONTINUATION OF SUBUNIT 2A;
Vesicles : Size(mm): Percent: RARE
SMALL,RARE TO ABSENT;
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): TO 3
RARELY TO 5MM;
OLIVINE
OL COMPLETELY REPLACED;
Replacement: SMECTITE
CALCITE
UNIDENTIFIED
Minerals Replaced: OL
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 286.00
Core: 4 Top of Core Depth (m) : 280.00
Sect: 4 Top of Section Depth(m): 284.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 327 (3-15), 328 (15-26), 329 (32-36),
330 (35-45), 331 (45-53), 332 (52-57), 333 (57-62),
334 (59-65), 335 (63-73), 336 (77-84), 337 (84-93),
338 (92-102), 339 (102-109), 340 (109-118),
341 (119-128), 342 (132-135), 343 (140-148);
Texture : MOD PHYRIC,COOLING MARGIN ON TOP OF PCE 327;
Structure : WHOLE SECTION APPEARS TO BE A MASSIVE FLOW,CRACKS
FILLED WITH LIGHT GREEN SMEC & CALCITE,PCE 343 HAS
3-4MM THICK VEINS,PILLOW BASALT;
Alteration : MOD
SMALL IRREGULAR SPOTS OF LIGHT GREEN SMEC IN PCES
329+330 & SMEC & CALCITE IN PCE 336;
Comments : CONTINUATION OF SUBUNIT 2A;
Vesicles : Size(mm): Percent: RARE
SMALL,RARE TO ABSENT;
Phenocrysts: PLAGIOCLASE ( TO 7%)
Size(mm): TO 4
OLIVINE ( TO 2%)
Size(mm): TO 2
Replacement: SMECTITE
CALCITE
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 287.50
Core: 4 Top of Core Depth (m) : 280.00
Sect: 5 Top of Section Depth(m): 286.00
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 344 (2-7), 345 (8-10), 346 (13-24),
347 (24-34), 348 (36-43), 349 (43-48), 350 (52-56),
351 (62-75), 352 (76-86), 353 (88-97),
354 (100-109), 355 (112-126), 356 (126-133),
357 (134-149);
Texture : MOD PHYRIC;
Structure : PILLOWS,MASSIVE FLOWS,CRACKS FILLED WITH LIGHT GREEN
SMEC & LOCALLY WITH CALCITE;
Alteration : MOD
ALONG SOME THIN CRACKS THERE ARE BROWN ZONES OF
OXIDATION(PCES 352-355);
Comments : CONTINUATION OF SUBUNIT 2A;
Vesicles : Size(mm): Percent: RARE
RARE TO ABSENT,SMALL WHEN PRESENT;
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): TO 5
OLIVINE ( 2%)
Size(mm): TO 2
OL COMPLETELY ALTERED;
Replacement: UNIDENTIFIED
Minerals Replaced: OL
SMECTITE
LIGHT GREEN;
CALCITE
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 291.00
Core: 5 Top of Core Depth (m) : 289.50
Sect: 1 Top of Section Depth(m): 289.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 358 (4-6), 359 (9-16), 360 (19-32),
361 (35-61), 362 (63-66), 363 (61-71), 364 (71-79),
365 (79-93), 366 (93-101), 367 (101-103),
368 (103-106), 369 (107-111), 370 (111-119),
371 (119-129), 372 (128-142), 373 (142-148);
Texture : MOD PHYRIC;
Structure : PILLOWS,CRACKS FILLED WITH LIGHT GREEN SMEC &
SOMETIMES WITH CALCITE,YELLOW-BROWN CLAY.MINS FILL
CAVITIES IN PCE 372;
Alteration : MOD
OL COMPLETELY REPLACED;
Comments : CONTINUATION OF SUBUNIT 2A;
Phenocrysts: PLAGIOCLASE ( TO 7%)
Size(mm): TO 7
MOSTLY BETWEEN 2-4MM;
OLIVINE ( 2%)
Size(mm): 2
COMPLETELY REPLACED BY LIGHT GREEN OR BROWN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
LIGHT GREEN OR BROWN;
CALCITE
CLAY
YELLOW-BROWN CLAY.MINS FILL CAVITIES IN PCE 372;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 292.50
Core: 5 Top of Core Depth (m) : 289.50
Sect: 2 Top of Section Depth(m): 291.00
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 373 (1-10), 374 (11-20), 375 (17-25),
376 (26-30), 377 (33-43), 378 (45-51), 379 (52-73),
380 (75-82), 381 (80-94), 382 (90-97), 383 (99-108),
384 (108-120), 385 (112-130), 386 (130-135),
387 (136-149);
Texture : MOD PHYRIC;
Structure : TWO(?) THIN MASSIVE FLOWS,CRACKS FILLED WITH LIGHT
GREEN SMEC & CALCITE,SMEC VEINS UP TO 2MM THICK;
Alteration : OL COMPLETELY ALTERED TO GREEN OR ORANGE SMEC &
CALCITE;
Comments : CONTINUATION OF SUBUNIT 2A;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( TO 7%)
Size(mm): TO 5
OLIVINE ( 2%)
Size(mm): 2
COMPLETELY ALTERED TO SMEC OR CALCITE;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Minerals Replaced: OL
SMEC & CALCITE ARE GREEN OR ORANGE;
CALCITE
LIGHT GREEN;
SMECTITE
LIGHT GREEN;
Leg : 69 Top/Bottom Interval(mm): 0/ 850 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 293.35
Core: 5 Top of Core Depth (m) : 289.50
Sect: 3 Top of Section Depth(m): 292.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PILLOW BASALT;
PCES 388 (2-10), 389 (14-21), 390 (25-35),
391A (39-42), 391B (47-55), 392 (58-65),
393 (68-74), 394 (77-83);
Texture : MOD PHYRIC;
Structure : PILLOW BASALT,CRACKS FILLED WITH LIGHT GREEN SMEC;
Alteration : OL COMPLETELY REPLACED;
Comments : CONTINUATION OF SUBUNIT 2A;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( TO 7%)
Size(mm): TO 4
OLIVINE ( 2%)
Size(mm): TO 2
OL COMPLETELY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
SMECTITE
LIGHT GREEN;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 300.00
Core: 6 Top of Core Depth (m) : 298.50
Sect: 1 Top of Section Depth(m): 298.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PILLOW BASALT;
PCES 395 (2-4), 396 (4-8), 397 (11-15),
398 (15-19), 399 (20-25), 401 (26-41), 402 (45-55),
403 (51-62), 404 (65-72), 405 (70-79), 406 (81-91),
407 (93-102), 408 (104-111), 409 (115-118),
410 (118 126), 411 (126-133), 412 (134 139),
413 (138-148);
Texture : PHYRIC,GLASS RINDS ON PCES 396+401-402+405-406+409+
413;
Structure : PILLOW BASALT,CRACKS FILLED WITH LIGHT GREEN SMEC &
CALCITE;
Alteration : MOD
PCES 395-401+402-406+409-413;
EXT
PCES 401+407-408,ALTERED ZONES NEXT TO GLASS
MARGINS;
Comments : CONTINUATION OF SUBUNIT 2A,MOST INTERVALS ARE FROM
INTERPILLOW BRECCIA;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): TO 5
OLIVINE ( 2%)
Size(mm): TO 2
OL COMPLETELY ALTERED TO SMEC & CARB.UNSPEC;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Minerals Replaced: OL
UNSPEC;
CALCITE
LIGHT GREEN;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 301.50
Core: 6 Top of Core Depth (m) : 298.50
Sect: 2 Top of Section Depth(m): 300.00
LITHOLOGY: APHYRIC TO PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 414 (2-14), 415 (15-28), 416 (28-41),
417 (42-50), 418 (44-60), 419 (61-70), 420 (62-75),
421 (75-83), 422 (80-103), 423 (107-117),
424 (119-125), 425 (125-133), 426 (125-133),
427 (135 146);
Texture : APHYRIC TO MOD PHYRIC,UNUSUAL SYMMETRIC ZONALITY
THROUGHOUT ENTIRE SECTION,PCE 414 GLASSY MARGIN,
LOWER HALF OF PCES 414+415 & UPPER PART OF PCE 416
MAKE UP AN APHYRIC FINE-GRAINED ZONE,LOWER PART OF
PCE 416 THROUGH PCE 422 IS MOD PHYRIC,LOWER PART OF
PCE 422 TO UPPER PART OF PCE 424 IS ANOTHER APHYRIC
ZONE,PCE 426 HAS LOWER GLASSY MARGIN;
Structure : PILLOW BASALT,CRACKS FILLED WITH LIGHT GREEN SMEC;
Alteration : MOD
OXIDATION ZONALITY EVIDENT ALONG SOME CRACKS;
Comments : SUBUNIT 2B,ICD REFERS TO THIS SECTION AS PLAG-OL MOD
PHYRIC(CHROMITE BEARING), PCE 426 BEGINS SUBUNIT 2C;
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): TO 4
LOWER HALF OF PCE 414,PCE 415,UPPER HALF OF PCE
416;
PLAGIOCLASE ( 4%)
Size(mm): TO 5
PCES 416-422;
OLIVINE ( 3%)
Size(mm): TO 2
PCE 414 IN ZONE NEXT TO GLASSY MARGIN,OL IS
COMPLETELY ALTERED,OL CONVERTED TO LIGHT GREEN
SMEC IN PCES 416-422;
Replacement: SMECTITE
Minerals Replaced: OL
PCES 416-422;
Leg : 69 Top/Bottom Interval(mm): 0/ 400 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 301.90
Core: 6 Top of Core Depth (m) : 298.50
Sect: 3 Top of Section Depth(m): 301.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCES 427 (2-12), 428 (15-23), 429 (27-30),
430 (29-34), 431 (34-37);
Texture : PHYRIC;
Structure : SMEC & CARB.UNSPEC VEINS IN PCE 427;
Alteration : MOD
PCE 427;
EXT
PCES 428-431;
Comments : CONTINUATION OF SUBUNIT 2C;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): TO 4
OLIVINE ( 3%)
Size(mm): TO 2
Replacement: SMECTITE
CARBONATE
UNSPEC;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 309.00
Core: 7 Top of Core Depth (m) : 307.50
Sect: 1 Top of Section Depth(m): 307.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 432 (2-5), 433 (7-14), 434 (16-23),
435 (23-30), 436 (30-37), 437 (39-49), 438 (51-62),
439 (62-67), 440 (67-70), 441 (66-76), 442 (76-87),
443 (88-91), 444 (91-96), 445 (96-105),
446 (103-107), 447 (107-113), 448 (113-124),
449 (124-129), 450 (127-133), 451 (130-142),
452 (142-150);
Texture : PHYRIC,PCES 443-444+450-452 COMPLETELY RECOVERED
GLASSY MARGINS;
Structure : ABUNDANT CRACKS FILLED WITH LIGHT GREEN SMEC &
CALCITE;
Alteration : MOD
PCE 437;
EXT
PCES 432-436+438-452,OL COMPLETELY ALTERED,ALONG
SOME CRACKS THERE IS A BROWN OXIDATION ZONE WITH
BROWN CLAY.MINS IN GNDMASS;
Comments : PCE 437 SEEMS TO BE ALTERED INTERPILLOW BRECCIA,
CONTINUATION OF SUBUNIT 2C;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): TO 4
OLIVINE ( 3%)
Size(mm): TO 2
OL COMPLETELY ALTERED TO SMEC & MORE SELDOM
CALCITE;
Replacement: CLAY MINERALS (S %)
BROWN;
SMECTITE
Minerals Replaced: OL
SMECTITE
LIGHT GREEN;
CALCITE
Minerals Replaced: OL
CALCITE
LIGHT GREEN;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 310.50
Core: 7 Top of Core Depth (m) : 307.50
Sect: 2 Top of Section Depth(m): 309.00
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCES 453 (2-12), 454 (11-32), 455 (31-36),
456 (34-42), 457 (42-47), 458 (47-62), 459 (62-77),
460 (77-85), 461 (85-89), 462 (89-97), 463 (97-100),
464 (100-106), 465 (106-107), 466 (108-113),
467 (115-120), 468 (120-125), 469 (124-130),
470 (130-140), 471 (143-148);
Texture : MOD PHYRIC,PCES 453-454+455-456+465-466+471 HAVE
GLASSY MARGINS;
Structure : ABUNDANT CRACKS FILLED WITH SMEC;
Alteration : MOD
BROWN OXIDATION ZONES NEAR GLASSY MARGINS & ALONG
SOME CRACKS;
Comments : CONTINUATION OF SUBUNIT 2C;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): TO 7
OLIVINE ( 3%)
Size(mm): TO 3
OL COMPLETELY ALTERED TO LIGHT GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
LIGHT GREEN,COMPLETELY REPLACES OL,ALSO FOUND IN
CRACKS;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 312.00
Core: 7 Top of Core Depth (m) : 307.50
Sect: 3 Top of Section Depth(m): 310.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 472 (3-8), 473 (11-17), 474 (12-22),
475 (22-25), 476 (25-30), 477 (30-37), 478 (37-43),
479 (45-51), 480 (53-60), 481 (63-68), 482 (70-75),
483 (77-80), 484 (83-86), 485 (88-92), 486 (95-100),
487 (102-110), 488 (112-120), 489 (121-129),
490 (129-140), 491 (144-147);
Texture : MOD PHYRIC,PCES 473+479+481+483-485 HAVE GLASSY
MARGINS,PCE 485 PERHAPS BEGINNING OF THICK FLOW;
Structure : PILLOWS & FLOWS,NUMEROUS CRACKS FILLED WITH LIGHT
GREEN SMEC & LOCALLY WITH CALCITE;
Alteration : MOD
BROWN ZONES OF OXIDATION(3-15MM) ALONG SOME GLASSY
MARGINS & CRACKS;
MOD TO EXT
PCE 482(SEVERAL FRAGMENTS);
Comments : PCES 472-485 SUBUNIT 2C,PCE 486 BEGINS SUBUNIT 2D,
PCES 472+482 MADE UP OF SEVERAL SMALL FRAGMENTS;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): TO 5
OLIVINE ( 2-3%)
Size(mm): TO 3
OL COMPLETELY ALTERED TO LIGHT GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
LIGHT GREEN,COMPLETELY REPLACES OL,ALSO FOUND IN
CRACKS;
CALCITE
Leg : 69 Top/Bottom Interval(mm): 0/1350 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 313.35
Core: 7 Top of Core Depth (m) : 307.50
Sect: 4 Top of Section Depth(m): 312.00
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCES 491 (2-3), 492 (7-13), 493 (13-24),
494 (25-32), 495 (33-38), 496 (39-48), 497 (48-55),
498 (55-60), 499 (60-69), 500 (70-80), 501 (82-86),
502 (87-92), 503 (92-98), 504 (99-109),
505 (110-118), 506 (120-124), 507 (124-130),
508 (130-135);
Texture : MOD PHYRIC;
Structure : CRACKS FILLED WITH GREEN & YELLOW SMEC & CALCITE,
PCE 504 HAS CRACK WITH LIGHT GREEN FIBROUS & DARK
GREEN CLAY SURROUNDED BY RED & YELLOW & GREEN ZONES;
Alteration : FRESH
MOD
PCES 494-497,OXIDIZED ZONES ALONG CRACKS;
Comments : CONTINUATION OF SUBUNIT 2D;
Vesicles : Size(mm): Percent: RARE
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): 2-3
OLIVINE ( <1%)
OL HAS FRESH CORES WITH PARTIAL REPLACEMENT BY
YELLOW-RED OR GREEN CLAY.MINS,PCE 505 HAS 5% OL;
Replacement: SMECTITE
YELLOW-RED,GREEN;
CALCITE
YELLOW-RED,GREEN;
CLAY
Minerals Replaced: OL
PARTIALLY REPLACES OL,YELLOW-RED & GREEN;
Leg : 69 Top/Bottom Interval(mm): 0/1200 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 314.70
Core: 7 Top of Core Depth (m) : 307.50
Sect: 5 Top of Section Depth(m): 313.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCES 509 (3-12), 510 (12-15), 511 (15-27),
512 (27-35), 513 (35-48), 514 (48-60), 515 (59-80),
516 (80-95), 517 (94-117);
Texture : MOD PHYRIC,FINE-GRAINED POSSIBLY A SINGLE FLOW;
Structure : CARB VEINING IS FIBROUS ARAGONITE WITH SOME RED &
GREEN SMEC;
Alteration : MOD
PCES 510-514+516-518,OXIDATION RIMS;
FRESH
PCES 509+515;
Comments : CONTINUATION OF SUBUNIT 2D;
Vesicles : Size(mm): <1 Percent: RARE
Location: Filling: CLAY.MINS
GREEN CLAY.MINS;
Phenocrysts: PLAGIOCLASE ( 3%)
Size(mm): 2-3
OLIVINE ( <1%)
Size(mm): <2
OL MOSTLY ALTERED,IN PCE 515 PHENOS HAVE FRESH
CORES WHICH GRADE OUTWARDLY TO RED OR GREEN CLAYS
INDICATING INCOMPLETE ALTERATION,OL PSEUDOMORPHS
OFTEN HAVE CALCITE CORES & RED OR GREEN CLAY RIMS;
Replacement: ARAGONITE
FIBROUS;
SMECTITE
RED & GREEN;
CALCITE
CLAY
Minerals Replaced: OL
RED OR GREEN;
Leg : 69 Top/Bottom Interval(mm): 0/1400 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 317.90
Core: 8 Top of Core Depth (m) : 316.50
Sect: 1 Top of Section Depth(m): 316.50
LITHOLOGY: APHYRIC TO OL SPARSELY PHYRIC BASALT;
Piece No. : PCES 519 (1-8), 520 (6-17), 521 (18-25),
522 (26-51), 523 (52-68), 524 (67-105),
525 (103-126), 526 (124-130);
Texture : APHYRIC TO OL SPARSELY PHYRIC BASALT,TRACE OF
COARSENING IN PCES 519-526;
Structure : VERTICAL & HORIZONTAL CRACKS IN PCES 522+524-525;
Alteration : MOD
STRONGLY OXIDIZED DOWN LENGTH OF SECTION BUT MORE
SO IN PCES 520+524+526;
FRESH
TOP OF PCE 524(67-78CM);
Comments : CONTINUATION OF SUBUNIT 2D,LIGHT GRAY BASALT,
POSSIBLY CONTINUATION OF FLOW FOUND IN CORE 7-5;
Phenocrysts: OLIVINE ( 0-2%)
Size(mm): <1
ALTERED TO DARK & LIGHT GREEN OR RED CLAY.MINS,OL
CONCENTRATION INCREASES DOWN CORE TO 2%,FRESH
CORES WHICH GRADE OUTWARDLY TO RED OR GREEN CLAYS,
DRILLED SURFACES HAVE WHITE PITS OR DEPRESSIONS
WHICH APPEAR TO BE LOCAL CONCENTRATIONS OF PLAG
BUT PROBABLY NOT PHENOS(?) TO 5%;
Replacement: CLAY
Minerals Replaced: OL
DARK & LIGHT GREEN OR RED CLAYS;
Leg : 69 Top/Bottom Interval(mm): 170/ 250 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 316.75
Core: 8 Top of Core Depth (m) : 316.50
Sect: 1 Top of Section Depth(m): 316.67
LITHOLOGY: PLAG-OL SPARSELY TO MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 521 (17-25);
Texture : SPARSELY TO MOD PHYRIC;
Alteration : FRESH
Comments : THIS PCE DOES NOT BELONG TO THIS SECTION &
APPARENTLY DROPPED DOWN HOLE;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): 2-5
CAN BE GLOMEROCRYSTIC;
OLIVINE ( TO 1%)
Size(mm): 1-2
PARTLY ALTERED TO CLAYS;
Replacement: CLAY
Minerals Replaced: OL
PARTLY;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 319.50
Core: 8 Top of Core Depth (m) : 316.50
Sect: 2 Top of Section Depth(m): 318.00
LITHOLOGY: APHYRIC TO OL SPARSELY PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 527 (3-27), 528 (28-53), 529 (49-79),
530 (80-90), 531 (89-108), 532 (110-119),
533 (115-132), 534 (133-148), 535 (143-148);
Texture : APHYRIC;
Structure : CRACKS FILLED WITH GREEN SMEC & CALCITE,PYR FOUND IN
SOME CRACKS,MASSIVE BASALT;
Alteration : MOD
TOP OF PCE 527(3-9CM),PCES 528-529,MIDDLE OF PCE
532(115-123CM),TOP OF PCE 534(134-140CM),OXIDIZED
ZONES ALONG CRACKS;
FRESH
REST OF SECTION;
Comments : CONTINUATION OF SUBUNIT 2D,LIGHT GRAY BASALT;
Vesicles : Size(mm): Percent: TR
Phenocrysts: OLIVINE ( <1%)
REPLACED BY GREEN SMEC & CALCITE,YELLOW-RED
SMEC REPLACES OL IN OXIDATION ZONE & ALONG CRACKS;
Replacement: CALCITE
Minerals Replaced: OL
GREEN;
SMECTITE
Minerals Replaced: OL
GREEN SMEC REPLACES OL,YELLOW-RED SMEC REPLACES
OL IN OXIDATION ZONES;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 321.00
Core: 8 Top of Core Depth (m) : 316.50
Sect: 3 Top of Section Depth(m): 319.50
LITHOLOGY: APHYRIC TO PLAG-OL SPARSELY PHYRIC BASALT;
Piece No. : PCES 536 (2-31), 537 (30-43), 538 (42-65),
539 (54-71), 540 (71-85), 541 (84-95), 542 (95-115),
543 (115-135), 544 (135-146);
Texture : APHYRIC TO PLAG-OL SPARSELY PHYRIC,FINE-TO-MEDIUM-
GRAINED,UNIFORM DOWN LENGTH OF SECTION EXCEPT FROM
PCES 542-544 WHICH BEGINS TO GET FINER-GRAINED BUT
ONLY SLIGHTLY(THIS MAY BE THE VISUAL EFFECT OF
OXIDIZED ZONE & NON-OXIDIZED(?));
Structure : MANY CRACKS IN PCES 536+538-544,PCE 543 HEAVILY
VEINED BY GREEN & RED SMEC & CALCITE,GNDMASS APPEARS
FELTED IN SOME AREAS WHERE VERY SMALL MICROLITES ARE
VISIBLE BUT NOT COMMON;
Alteration : MOD
Comments : LIGHT GRAY BASALT;
Vesicles : Size(mm): Percent: TR
Phenocrysts: PLAGIOCLASE ( 2%)
Size(mm): 2-3
OLIVINE ( 1%)
Size(mm): TO 1
PLAG & OL FOUND IN PCE 543,OL PSEUDOMORPHS FOUND
(OF SE%)
Size(mm): CTION;
Replacement: CLAY
Minerals Replaced: OL
GREEN,RED,BROWN;
SMECTITE
CALCITE
PCE 543 SMEC & CALCITE ARE GREEN & RED;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 322.50
Core: 8 Top of Core Depth (m) : 316.50
Sect: 4 Top of Section Depth(m): 321.00
LITHOLOGY: APHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 545 (1-10), 546 (10-14), 547 (10-14),
548 (18-21), 549 (27-40), 550 (30-38), 551 (42-45),
552 (42-45), 553 (48-63), 554 (65-79), 555 (84-101),
556 (102-112), 557 (112-125), 558 (126-134),
559 (135-141), 560 (142-147);
Texture : APHYRIC;
Structure : MASSIVE,CRACKS FILLED WITH CALCITE & GREEN SMEC;
Alteration : MOD
PCES 545+550+554+555+558-560,TOP & BOTTOM OF PCE
557(112-116+124-125CM),WELL DEVELOPED OXIDATION
ZONE,OL REPLACED;
FRESH
REST OF SECTION;
Vesicles : Size(mm): Percent: RARE
Location: Filling: SMEC
FILLED WITH GREEN OR YELLOW SMEC;
Phenocrysts: PLAGIOCLASE ( RARE%)
OLIVINE ( <1%)
Size(mm): <1
REPLACED BY GREEN CLAYS & CALCITE IN "FRESH
BASALT";
PLAGIOCLASE ( RARE%)
Replacement: CALCITE
CLAY
YELLOW,LIGHT GREEN,RED;
SMECTITE
GREEN,YELLOW-RED;
Leg : 69 Top/Bottom Interval(mm): 0/ 950 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 323.45
Core: 8 Top of Core Depth (m) : 316.50
Sect: 5 Top of Section Depth(m): 322.50
LITHOLOGY: APHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 561 (3-19), 562 (20-29), 563 (32-43),
564 (47-63), 565 (67-80), 566 (84-86), 567 (88-92);
Texture : APHYRIC;
Structure : CRACKS FILLED WITH CALCITE;
Alteration : MOD
PCES 561+567,BOTTOM OF PCE 563(40-43CM),TOP OF PCE
563(46-47CM),FILLED WITH CALCITE & GREEN SMEC;
FRESH
REST OF SECTION;
Vesicles :
Location: Filling: SMEC,CLAY.MINS
BLUE-GREEN SMEC IN "FRESH BASALT",OXIDIZED RIMS
HAVE YELLOW-RED & DARK GREEN CLAY.MINS FILLING
VESICLES;
Phenocrysts: OLIVINE ( <1%)
REPLACED BY BLUE-GREEN OR HONEY-YELLOW SMEC & BY
YELLOW-RED CLAYS IN OXIDIZED ZONES & CALCITE;
Replacement: SMECTITE
Minerals Replaced: OL
SMEC IS BLUE-GREEN OR HONEY-YELLOW;
( TR%)
PCE 565;
CLAY
Minerals Replaced: OL
YELLOW-RED IN OXIDIZED ZONES;
CLAY
YELLOW-RED & DARK GREEN;
CALCITE
Leg : 69 Top/Bottom Interval(mm): 0/ 770 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 326.27
Core: 9 Top of Core Depth (m) : 325.50
Sect: 1 Top of Section Depth(m): 325.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCES 568 (8-19), 569 (2-11), 570 (15-30),
571 (28-48), 572 (48-58), 573 (60-65), 574 (63-76);
Texture : PHYRIC,MICROXTLLINE;
Structure : HEAVILY CRACKED & VEINED BY CARB.UNSPEC & GREEN
CLAY.MINS;
Alteration : MOD
PCES 568-570+573-574,TOP OF PCES 571+572(28-34+
48-52CM),BOTTOM OF PCE 571(44-48);
Comments : PALE GRAY,PCE 574 MARKS END OF SUBUNIT 2D;
Phenocrysts: PLAGIOCLASE ( 7-10%)
Size(mm): 2-5
OLIVINE ( 1-2%)
Size(mm): 1-2
OL IS FRESH OR PARTLY ALTERED OR FOUND AS
PSEUDOMORPHS(ALL 3 STATES MAY BE FOUND IN ANY
SPECIMEN);
Replacement: CLAY
Minerals Replaced: OL
GREEN OR RED IN OXIDIZED AREAS;
CARBONATE
UNSPEC;
Leg : 69 Top/Bottom Interval(mm): 770/1400 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 326.90
Core: 9 Top of Core Depth (m) : 325.50
Sect: 1 Top of Section Depth(m): 326.27
LITHOLOGY: APHYRIC TO OL-PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCES 575 (78-85), 576 (90-97), 577 (100-108),
578 (110-112), 579 (112-116), 580 (116-118),
581 (120-128), 582 (128-138);
Texture : APHYRIC TO SPARSELY PHYRIC,VERY FINE-GRAINED;
Structure : POSSIBLY PILLOW BUT GLASS IS NO LONGER PRESENT;
Alteration : FRESH
Comments : LIGHT GRAY COLOR CHARACTERIZATION BY LACK OF PLAG &
PRESENCE OF OL,PCE 575 MARKS BEGINNING OF SUBUNIT
3A;
Phenocrysts: OLIVINE ( TO 2%)
Size(mm): 1-2
PLAGIOCLASE ( TO 1%)
Size(mm): TO 1
OL IS FRESH OR PARTLY/COMPLETELY ALTERED TO DARK
GREEN CLAYS,PCE 582 EXHIBITS ALL 3 EXAMPLES;
Replacement: CLAY
Minerals Replaced: OL
DARK GREEN;
Leg : 69 Top/Bottom Interval(mm): 1400/1500 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 327.00
Core: 9 Top of Core Depth (m) : 325.50
Sect: 1 Top of Section Depth(m): 326.90
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 583 (141-149);
Texture : APHYRIC,EXTREMELY FINE-GRAINED,SPHERULITIC MARGIN;
Alteration : FRESH
Comments : DARK GRAY,CONTINUATION OF SUBUNIT 3A;
Phenocrysts: OLIVINE ( TO 2%)
Size(mm): 1
FRESH;
PLAGIOCLASE ( TR%)
TRACE OF PLAG AWAY FROM MARGIN;
Leg : 69 Top/Bottom Interval(mm): 0/1450 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 328.45
Core: 9 Top of Core Depth (m) : 325.50
Sect: 2 Top of Section Depth(m): 327.00
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 584 (2-4), 585 (7-8), 586 (12-16), 587 (17-22),
588 (24-26), 589 (28-30), 590 (33-40), 591 (42-49),
592 (51-53), 593 (54-55), 594 (58), 595 (57-59),
596 (62-70), 597 (72-85), 598 (90-96),
599 (101-106), 600 (110-114), 601 (117-119),
602 (122-125), 603 (128-133), 604 (136-138),
605 (138-140);
Texture : APHYRIC,CHILLED MARGIN,PCES 584-591+596+604-605
SPHERUL TEXTURE,PCE 597 COARSE-GRAINED,PCES 584-585
SPARSELY PHYRIC;
Structure : PILLOW LAVAS,PCES 584-585 PILLOW MARGIN;
Alteration : FRESH
OL IS ALTERED TO CLAY.MINS OR IS FRESH,PCE 597 HAS
OXIDIZED RIM;
Comments : UPPER PART OF PCE 597 IS A CONTACT WITH PILLOW
BRECCIA,CONTINUATION OF SUBUNIT 3A;
Vesicles : Size(mm): Percent: RARE
Location: Filling: CLAY.MINS
DARK GREEN CLAYS;
Phenocrysts: OLIVINE ( <1%)
OL ALTERED TO DARK GREEN CLAY.MINS & SOMETIMES OL
IS FRESH;
PLAGIOCLASE ( <2%)
PCES 584-585;
Replacement: CLAY
Minerals Replaced: OL
OL ALTERED TO DARK GREEN CLAY.MINS;
CLAY
YELLOW-RED CLAY.MINS FOUND IN OXIDIZED RIM OF PCE
597;
Leg : 69 Top/Bottom Interval(mm): 0/ 400 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 334.90
Core: 10 Top of Core Depth (m) : 334.50
Sect: 1 Top of Section Depth(m): 334.50
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 606 (4-9), 607 (3-9), 608 (12-18), 609 (20-30),
610 (33-39);
Texture : APHYRIC,BECOMES FINER-GRAINED FROM PCE 606 TO PCE
610;
Structure : PILLOW BASALT,PCES 606-609 VERY HIGHLY FRACTURED
(FAULT BRECCIA?) AND FILLED WITH DARK GREEN
CLAY.MINS;
Alteration : SLIGHTLY TO MOD
OXIDIZED ZONE IN PCE 610(28-31CM);
Comments : CONTINUATION OF SUBUNIT 3A;
Phenocrysts: OLIVINE ( <<1%)
PLAGIOCLASE ( 0%)
OL REPLACED BY GREEN OR ORANGE CLAY.MINS IN
OXIDIZED ZONE OF PCE 610;
Replacement: CLAY
Minerals Replaced: OL
GREEN,ORANGE;
CLAY
DARK GREEN IN FRACTURES;
Leg : 69 Top/Bottom Interval(mm): 400/1250 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 335.75
Core: 10 Top of Core Depth (m) : 334.50
Sect: 1 Top of Section Depth(m): 334.90
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 611 (43-49), 612 (52-59), 613 (62-64),
614 (65-70), 615 (73-81), 616 (84-90), 617 (90-95),
618 (100-105), 619 (107-110), 620 (110-115),
621 (117-125);
Texture : APHYRIC,APHANITIC,SPHERUL ZONE IN PCES 611+619-621;
Structure : PILLOW BASALT,STRONGLY FRACTURED AROUND PCE 614 &
FILLED WITH DARK GREEN CLAY.MINS;
Alteration : SLIGHTLY TO MOD
OXIDIZED ZONE IN PCE 615(1MM WIDE);
Comments : CONTINUATION OF SUBUNIT 3A,PCES 611-621 MAKE UP ONE
ENTIRE PILLOW;
Phenocrysts: OLIVINE ( TR%)
REPLACED BY GREEN CLAY.MINS OR ORANGE IN OXIDIZED
ZONE OF PCE 615;
PLAGIOCLASE ( TR%)
GLOMEROCRYSTIC(?) IN SPHERUL ZONE OF PCE 611 ONLY;
Replacement: CLAY
Minerals Replaced: OL
GREEN OR ORANGE(IN OXIDIZED ZONE OF PCE 615);
CLAY
DARK GREEN IN FRACTURES;
Leg : 69 Top/Bottom Interval(mm): 1250/1500 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 336.00
Core: 10 Top of Core Depth (m) : 334.50
Sect: 1 Top of Section Depth(m): 335.75
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 622 (127-130), 623 (128-132), 624 (132-136),
625 (135-137), 626 (140-147);
Texture : APHYRIC,COARSER THAN PCES 606-610;
Alteration : SLIGHTLY TO MOD
PCE 626 HAS SPHERULITIC ZONE;
Comments : DARKER THAN PCES 606-610,CONTINUATION OF SUBUNIT 3A;
Phenocrysts: OLIVINE ( TR%)
FRESH,MAJORITY OF OL REPLACED BY GREEN CLAY.MINS;
Replacement: CLAY
Minerals Replaced: OL
GREEN,REPLACES MAJORITY OF OL PRESENT;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 337.50
Core: 10 Top of Core Depth (m) : 334.50
Sect: 2 Top of Section Depth(m): 336.00
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 627 (2-6), 628 (10-17), 629 (20-27),
630 (32-34), 631 (38-46), 632 (51-65), 633 (70-75),
634 (79-86), 635 (86-93), 636 (95-103),
637 (105-112), 638 (112-118), 639 (121-125),
640 (129-138), 641 (142-149);
Texture : APHYRIC,PCES 627-628 COARSE-GRAINED(CONTINUATION OF
PCES 622-626 OF CORE 10-1),PCE 629 IS TRANSITION
BETWEEN COARSE-GRAINED (WITH SPHERULITIC TEXTURE) &
FINE-GRAINED BASALT(TOWARD BOTTOM OF FLOW),PCES 630-
641 FINE-GRAINED BASALT WITH SPHERULITIC TEXTURE &
CHILLED MARGIN;
Structure : PILLOW BASALT,PCES 627+628 PART OF THIN MASSIVE
FLOW(?);
Alteration : SLIGHT TO MOD
OL REPLACED IN PCES 627-628,OXIDATION ZONE IN PCES
627-628,CHILLED MARGINS ALTERED BETWEEN PCES 630-
641;
Comments : CONTINUATION OF SUBUNIT 3A;
Phenocrysts: OLIVINE ( RARE%)
OL REPLACED BY DARK GREEN SMEC IN PCES 627-628,
SOME OL FRESH IN PCE 627;
Replacement: SMECTITE
Minerals Replaced: OL
DARK GREEN,PCES 627-628;
CLAY
YELLOW-RED IN OXIDATION ZONE IN PCES 627+628;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 339.00
Core: 10 Top of Core Depth (m) : 334.50
Sect: 3 Top of Section Depth(m): 337.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 642 (2-11), 643 (14-19), 644 (24-30),
645 (31-36), 646 (40-45), 647 (49-51), 648 (51-54),
649 (57-61), 650 (65-69), 651 (64-66), 652 (72-76),
653 (78-83), 654 (85-88), 655 (88-93), 656 (97-106),
657 (110-113), 658 (117-123), 659 (127-132),
660 (135-140), 661 (142-148);
Texture : APHYRIC, SPHERULITIC TEXTURE PCES 642-643+647-650+65
+ 661,GLASSY RIND PCE 658;
Alteration : SLIGHT TO MOD
OL ALTERED TO SMEC,PCES 645+660 HAVE OXIDATION
ZONES;
Comments : CONTINUATION OF SUBUNIT 3A,PCES 650-656 BRECCIA,PCE
656 MADE UP OF SEVERAL SMALL FRAGMENTS;
Vesicles : Size(mm): Percent: RARE
Phenocrysts: OLIVINE ( <1%)
OL ALTERED TO DARK GREEN SMEC;
Replacement: CLAY
YELLOW-RED IN OXIDIZED ZONES OF PCES 645+660,DARK
GREEN(PHIL?);
SMECTITE
Minerals Replaced: OL
DARK GREEN;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 345.00
Core: 11 Top of Core Depth (m) : 343.50
Sect: 1 Top of Section Depth(m): 343.50
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
Piece No. : PCES 662 (2-9), 663 (10-24), 664 (27-32),
665 (34-40), 666 (43-55), 667 (58-62), 668 (65-71),
669 (74-81), 670 (85-91), 671 (94-99),
672 (102-105), 673 (107-110), 674 (113-117),
675 (120-123), 676 (127-130), 678 (134-141),
679 (143-147);
Texture : SPARSELY PHYRIC,MICROPHYRIC,UNIFORMLY FINE-GRAINED
BUT A LITTLE COARSER-GRAINED NEAR END OF SECTION
(POSSIBLY A FLOW);
Structure : MANY CRACKS FILLED MOSTLY WITH LIGHT GREEN SMEC OR
IN OXIDATION ZONES WITH RED CLAY.MINS;
Alteration : MOD
OXIDATION ZONES,OL COMPLETELY ALTERED;
Comments : CONTINUATION OF SUBUNIT 3A,THERE IS NO PCE 677;
Phenocrysts: OLIVINE
Size(mm): TO 1
PLAGIOCLASE
Size(mm): TO 1
ALL PHENOS TOTAL <2%,OL ALTERED TO CLAY.MINS;
CLINOPYROXENE ( RARE%)
MICROPHENOS;
Replacement: SMECTITE
LIGHT GREEN;
CLAY
RED IN OXIDATION ZONES;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 346.50
Core: 11 Top of Core Depth (m) : 343.50
Sect: 2 Top of Section Depth(m): 345.00
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
Piece No. : PCES 680 (2-8), 681 (12-15), 682 (20-28),
683 (32-38), 684 (43-48), 685 (51-53), 686 (56-58),
687 (59-72), 688 (73-84), 689 (86-95), 690 (99-103),
691 (107-111), 692 (115-130), 693 (130-140),
694 (140-149);
Texture : SPARSELY PHYRIC,UNIFORMLY FINE-GRAINED,HOLOXTLLINE;
Structure : CRACKS FILLED WITH GREEN SMEC(SOMETIMES RED);
Alteration : MOD
EXT
TOP OF PCE 680;
Comments : CONTINUATION OF SUBUNIT 3A,PCE 680 BRECCIATED WITH
LIGHT GREEN SMEC CEMENT;
Phenocrysts: OLIVINE
Size(mm): TO 1
PLAGIOCLASE
Size(mm): TO 1
ALL OL & PLAG MICROPHENOS TOTAL <2%;
Replacement: SMECTITE
LIGHT GREEN,RARELY RED;
Leg : 69 Top/Bottom Interval(mm): 0/1100 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 347.60
Core: 11 Top of Core Depth (m) : 343.50
Sect: 3 Top of Section Depth(m): 346.50
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
Piece No. : PCES 695 (2-20), 696 (15-31), 697 (32-41),
698 (42-45), 699 (48-55), 700 (59-62), 701 (67-73),
702 (77-83), 703 (87-93), 704 (94-97),
705 (100-103), 706 (103-106);
Texture : SPARSELY PHYRIC,FINE-GRAINED,APHANITIC,APHANITIC
CHILLED MARGINS IN PCES 700+701;
Structure : CRACKS FILLED WITH GREEN SMEC;
Alteration : MOD
Comments : CONTINUATION OF SUBUNIT 3A;
Phenocrysts: OLIVINE
Size(mm): TO 1
PLAGIOCLASE
Size(mm): TO 1
ALL OL & PLAG MICROPHENOS TOTAL <2%;
Replacement: SMECTITE
THICK GREEN SMEC IN SPACE BETWEEN CHILLED MARGINS;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 354.00
Core: 12 Top of Core Depth (m) : 352.50
Sect: 1 Top of Section Depth(m): 352.50
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 707 (3-5), 708 (8-11), 709 (14-18),
710 (21-24), 712 (26-34), 713 (34-38), 714 (40-48),
715 (48-53), 716 (59-63), 717 (63-67), 718 (66-76),
719 (76-81), 720 (84-89), 721 (92-98),
722 (100-110), 723 (108-113), 724 (115-123),
725 (123-126), 726 (128-136), 727 (140-148);
Texture : SPARSELY PHYRIC BASALT,MICROPHYRIC,UNIFORM TEXTURE
THROUGHOUT BUT NEAR COOLING MARGINS IT IS MORE FINE-
GRAINED & APHANITIC;
Structure : PILLOWS &/OR THIN FLOWS,ABUNDANT CRACKS FILLED WITH
GREEN SMEC OR MORE RARELY WITH RED CLAY.MINS;
Alteration : MOD
EXT
PCE 121;
Comments : CONTINUATION OF SUBUNIT 3A,THERE IS NO PCE 711;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 1
OLIVINE
Size(mm): TO 1
OL & PLAG MICROPHENOS,2% TOTAL MICROPHENOS;
Replacement: SMECTITE
GREEN;
CLAY ( RARE%)
RED CLAY.MINS;
Leg : 69 Top/Bottom Interval(mm): 0/1350 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 355.35
Core: 12 Top of Core Depth (m) : 352.50
Sect: 2 Top of Section Depth(m): 354.00
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 728 (2-7), 729 (9-17), 730 (20-25),
731 (28-34), 732 (37-41), 733 (44-47), 734 (51-53),
735 (56-64), 736 (64-68), 737 (71-74), 738 (77-79),
739 (82-85), 740 (87-92), 741 (94-97),
742 (102-104), 743 (107-113), 744 (113-119),
745 (123-128), 746 (129-134);
Texture : APHYRIC,UNIFORMLY FINE-GRAINED;
Structure : CRACKS FILLED WITH GREEN & RED CLAY.MINS,PILLOW
BASALT;
Comments : CONTINUATION OF SUBUNIT 3A;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 1
OLIVINE
Size(mm): TO 1
ALL PHENOS TOTAL 2%;
Replacement: CLAY
GREEN & RED CLAY.MINS;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 363.00
Core: 13 Top of Core Depth (m) : 361.50
Sect: 1 Top of Section Depth(m): 361.50
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 747 (3-5), 748 (8-11), 749 (12-21),
750 (24-28), 751 (28-34), 752 (28-38), 753 (38-42),
754 (45-53), 755 (55-58), 756 (62-65), 757 (68-71),
758 (75-82), 759 (82-91), 760 (90-109),
761 (110-118), 762 (120-131), 763 (122-130),
764 (130-132), 765 (135-147);
Texture : APHYRIC,APHANITIC NEAR COOLING MARGINS,HOLOXTLLINE
INTERIOR;
Structure : PILLOWS & FLOWS,CRACKS FILLED WITH GREEN & RED
CLAY.MINS;
Alteration : MOD
Comments : CONTINUATION OF SUBUNIT 3A;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE
Size(mm): TO 2
OLIVINE
Size(mm): TO 2
ALL PHENOS TOTAL 1%;
Replacement: CLAY
GREEN & RED CLAY.MINS;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 364.50
Core: 13 Top of Core Depth (m) : 361.50
Sect: 2 Top of Section Depth(m): 363.00
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 766 (2-6), 767 (8-12), 768 (13-17),
769 (19-24), 770 (25-28), 771 (26-29), 772 (28-37),
773 (38-43), 774 (45-49), 775 (51-58), 776 (60-65),
777 (68-74), 778 (73-81), 779 (83-88), 780 (89-92),
781 (93-102), 782 (99-106), 783 (107-109),
784 (110-124), 785 (125-148);
Texture : APHYRIC,APHANITIC NEAR COOLING MARGINS,MORE COARSE-
GRAINED IN A MASSIVE FLOW(PCES 784+785),NO FRESH
GLASS PRESERVED IN COOLING SELVAGES;
Structure : PILLOWS & MASSIVE FLOWS,CRACKS FILLED WITH GREEN &
RED CLAY.MINS;
Alteration : MOD
OL ALTERED,NO FRESH GLASS IN COOLING SELVAGES;
Comments : CONTINUATION OF SUBUNIT 3A;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE
Size(mm): TO 2
OLIVINE
Size(mm): TO 2
OL ALTERED TO SMEC;
Replacement: CLAY
GREEN & RED CLAY.MINS;
SMECTITE
Minerals Replaced: OL
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 366.00
Core: 13 Top of Core Depth (m) : 361.50
Sect: 3 Top of Section Depth(m): 364.50
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 786 (2-12), 787 (12-32), 788 (32-43),
789 (43-51), 790 (51-63), 791 (63-69), 792 (69-77),
793 (77-87), 794 (85-93), 795 (93-97), 796 (97-100),
797 (101-109), 798 (109-121), 799 (127-133),
800 (133-149);
Texture : APHYRIC,UNIFORMLY FINE-GRAINED & HOLOXTLLINE;
Structure : PILLOW BASALT,CRACKS;
Alteration : MOD
RED & YELLOW OXIDATION ZONALITY LOCATED ALONG SOME
CRACKS,PCES 787-793 HAVE A PITTED ZONE WHICH
APPEARS TO BE SPOTS OF LEACHING FILLED OR PARTLY
FILLED WITH GREEN SMEC(SOME SPOTS LOCATED ALONG
CRACKS);
Comments : CONTINUATION OF SUBUNIT 3A;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE
Size(mm): TO 2
OLIVINE
Size(mm): TO 2
ALL PHENOS TOTAL ABOUT 1%;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 367.50
Core: 13 Top of Core Depth (m) : 361.50
Sect: 4 Top of Section Depth(m): 366.00
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 801 (2-10), 802 (5-12), 803 (13-27),
804 (23-27), 805 (28-41), 806 (38-58), 807 (54-60),
808 (60-63), 809 (64-68), 810 (68-80), 811 (82-91),
812 (91-92), 813 (95-100), 814 (103-106),
815 (110-114), 816 (117-124), 817 (124-134),
818 (135-147);
Texture : APHYRIC,FINE-GRAINED,HOLOXTLLINE,MARGIN BETWEEN TWO
FLOW(PCES 812+813),PCE 812 APHANITIC;
Structure : PILLOW BASALT,PCES 817+818 HAVE THICK VEINS OF LIGHT
GREEN SMEC;
Alteration : MOD
RED & YELLOW OXIDATION ZONES;
Comments : PCES 801-811 SUBUNIT 3A,PCE 812 BEGINS SUBUNIT 3B;
Phenocrysts: PLAGIOCLASE
OLIVINE
ALL PHENOS TOTAL ABOUT 1%;
Replacement: SMECTITE
LIGHT GREEN;
Leg : 69 Top/Bottom Interval(mm): 0/1200 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 368.70
Core: 13 Top of Core Depth (m) : 361.50
Sect: 5 Top of Section Depth(m): 367.50
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 819 (1-12), 820 (15-17), 821 (20-24),
822 (26-32), 823 (34-40), 824 (40-44), 825 (44-48),
826 (49-53), 827 (52-56), 828 (60-62), 829 (63-66),
830 (70-76), 831 (78-88), 832 (91-95), 833 (99-104),
834 (108-112), 835 (114-118);
Texture : APHYRIC,APHANITIC OR EVEN GLASSY NEAR COOLING
MARGINS,NO FRESH GLASS;
Structure : PILLOW BASALT,PCES 819+822 THICK VEINS OF GREEN
SMEC;
Alteration : EXT
PCES 828-831;
MOD
ALTERATION AT COOLING SELVAGES;
Comments : CONTINUATION OF SUBUNIT 3B;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 2
OLIVINE
Size(mm): TO 2
ALL PHENOS TOTAL ABOUT 1%;
Replacement: SMECTITE
GREEN;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 372.00
Core: 14 Top of Core Depth (m) : 370.50
Sect: 1 Top of Section Depth(m): 370.50
LITHOLOGY: OL SPARSELY MICROPHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 836 (2-4), 837 (7-10), 838 (13-18),
839 (20-23), 840 (26-33), 841 (37-44), 842 (46-50),
843 (53-55), 844 (60-65), 845 (67-75), 846 (75-78),
847 (81-83), 848 (86-91), 849 (91-100),
850 (101-104), 851 (105-111), 852 (110-112),
853 (113-122), 854 (121-124), 855 (125-127),
856 (127-130), 857 (133-141), 858 (142-148);
Texture : SPARSELY MICROPHYRIC,SPHERUL TEXTURE PCES 841+851-
857;
Structure : PILLOW BASALT,CRACKS FILLED WITH GREEN SMEC;
Alteration : SLIGHT TO MOD
OL ALTERED TO SMEC IN NON-OXIDIZED ZONES & TO RED-
YELLOW CLAY.MINS IN OXIDIZED ZONES;
Comments : CONTINUATION OF SUBUNIT 3B;
Vesicles : Size(mm): Percent: RARE
Phenocrysts: OLIVINE ( <1%)
MICROPHENOS,ALTERED TO DARK GREEN SMEC & SOMETIMES
FRESH OL IN NON-OXIDIZED ZONES;
PLAGIOCLASE
MORE ABUNDANT IN PCE 840,GLOMEROCRYSTS;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN,DARK GREEN FOR ALTERED OL;
CLAY
Minerals Replaced: OL
YELLOW-RED CLAY.MINS IN OXIDIZED ZONES;
Leg : 69 Top/Bottom Interval(mm): 0/1000 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 373.00
Core: 14 Top of Core Depth (m) : 370.50
Sect: 2 Top of Section Depth(m): 372.00
LITHOLOGY: PLAG-OL SPARSELY MICROPHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 859 (3-18), 860 (21-24), 861 (27-29),
862 (32-43), 863 (42-50), 864 (49-57), 865 (60-64),
866 (67-77), 867 (78-81), 868 (84-88), 869 (92-99);
Texture : SPARSELY MICROPHYRIC,APHANITIC OR GLASSY AT PCES
868+869,SPHERULITIC TEXTURE PCES 865+867-868;
Structure : PILLOW BASALT,PCES 862-864 MICROPHYRIC PILLOW
CENTER(?),PCE 869 PILLOW JUNCTION;
Alteration : EXT
PCES 859+866,GLASS ALTERED PCE 869;
Comments : PCE 359 MARKS END OF SUBUNIT 3B,PCE 860 BEGINS
SUBUNIT 3C,PCES 859+866 ARE MADE UP OF SEVERAL SMALL
FRAGMENTS,BRECCIATED INTERPILLOW MATERIAL CEMENTED
BY GREEN CLAY.MINS IN PCES 867-868(POSSIBLY PCES
859+866 BUT BROKEN UP);
Vesicles : Size(mm): Percent: RARE
Phenocrysts: OLIVINE ( <1%)
PLAGIOCLASE ( <1%)
TOTAL ALL MICROPHENOS ABOUT 1%,FRESH OL IN PCE 862
BUT ELSEWHERE REPLACED BY GREEN OR RED CLAY.MINS,
PLAG PHENOS 2-3MM FOUND IN MARGIN OF PCE 869
Replacement: CLAY
Minerals Replaced: OL
GREEN OR RED CLAY.MINS;
CLAY
GREEN CLAY.MINS CEMENTS BRECCIATED MATERIAL;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 376.50
Core: 15 Top of Core Depth (m) : 375.00
Sect: 1 Top of Section Depth(m): 375.00
LITHOLOGY: PLAG-OL SPARSELY MICROPHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 870 (2-12), 871 (13-16), 872 (20-27),
873 (30-40), 874 (43-48), 875 (46-49), 876 (51-58),
877 (60-65), 878 (68-73), 879 (76-80), 880 (82-83),
881 (86-93), 882 (95-99), 883 (103-110),
884 (112-120), 885 (121-129), 886 (132-139),
887 (142-147);
Texture : SPARSELY MICROPHYRIC,PCE 878 GLASSY MARGIN,PCE 886
COARSE-GRAINED BASALT,SPHERUL TEXTURE PCES 872-873+
877+883;
Structure : PILLOW BASALT,CRACKS WITH GREEN CLAYS;
Alteration : SLIGHT TO MOD
OXIDIZED ZONES,OL ALTERED;
Comments : CONTINUATION OF SUBUNIT 3C,PCES 870-872 BRECCIA WITH
PILLOW CEMENTS,LIGHT GRAY BASALT;
Phenocrysts: OLIVINE ( <1%)
PLAGIOCLASE
OL FRESH(PCES 872+885+887) OR ALTERED TO SMEC OR
CLAY.MINS;
Replacement: SMECTITE
Minerals Replaced: OL
DARK GREEN;
CLAY
Minerals Replaced: OL
YELLOW-RED IN OXIDIZED ZONES;
CLAY
GREEN;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 378.00
Core: 15 Top of Core Depth (m) : 375.00
Sect: 2 Top of Section Depth(m): 376.50
LITHOLOGY: PLAG-OL SPARSELY MICROPHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 888 (1-12), 889 (12-15), 890 (15-19),
891 (15-23), 892 (23-28), 893 (26-36), 894 (38-44),
895 (46-55), 896 (57-68), 897 (70-76), 898 (76-81),
899 (83-94), 900 (98-110), 901 (103-109),
902 (121-133), 903 (123-132), 904 (132-148);
Texture : SPARSELY MICROPHYRIC,APHANITIC,PCES 902-904 SLIGHTLY
COARSER-GRAINED;
Structure : PILLOW BASALT,PILLOW MARGINS VEINED BY GREEN CLAYS,
ENTIRE SECTION VEINED BY CLAY.MINS;
Comments : CONTINUATION OF SUBUNIT 3C,PILLOW MARGINS BRECCIATED
IN APPEARANCE(NOT STRONGLY);
Vesicles : Size(mm): Percent: RARE
Phenocrysts: OLIVINE
Size(mm): <1
PLAGIOCLASE
Size(mm): <2
CLINOPYROXENE
Size(mm): <4
CPX OCCURS AWAY FROM MARGINS,TOTAL MICROPHENOS
ABOUT 1%,OL ALTERED TO CLAY.MINS OR IS FRESH;
Replacement: CLAY
GREEN CLAY.MINS;
UNIDENTIFIED
Minerals Replaced: GLASS
CLAY
Minerals Replaced: OL
GREEN OR RED CLAY.MINS;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 379.50
Core: 15 Top of Core Depth (m) : 375.00
Sect: 3 Top of Section Depth(m): 378.00
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 905 (2-8), 906 (12-16), 907 (20-25),
908 (29-31), 909 (36-43), 910 (45-52), 911 (54-57),
912 (61-65), 913 (69-77), 914 (79-87), 915 (88-97),
916 (98-108), 917 (108-115), 918 (117-125),
919 (124-135), 920 (132-138), 921 (138-142),
922 (141-145), 923 (144-148);
Texture : MOD PHYRIC,APHANITIC,COARSER-GRAINED PCES 916-923;
Structure : PILLOW BASALT,FRACTURES LINED WITH RED/GREEN CLAY;
Alteration : SLIGHT TO MOD
PCES 912+915 HAVE ALT.GLAS,ALTERATION NEAR CRACKS;
Comments : CONTINUATION OF SUBUNIT 3C;
Phenocrysts: PLAGIOCLASE ( <3%)
Size(mm): 2-3
OLIVINE ( <1%)
Size(mm): 1-2
CLINOPYROXENE ( TR%)
Size(mm): TO 5
PILLOW CENTERS HAVE PLAG & OL TO 1% & TO 1MM,
PHENOS SLIGHTLY MORE COMMON(TO 2%) & LARGER IN
PCES 916-923 ,PHENOS NOT PRONOUNCED IN MARGIN
AREAS OF PCES 906+912+915 TO 2% & NO CPX;
Replacement: UNIDENTIFIED
Minerals Replaced: GLASS
PCES 912+915;
CLAY
RED & GREEN,LINES MANY FRACTURES;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 381.00
Core: 15 Top of Core Depth (m) : 375.00
Sect: 4 Top of Section Depth(m): 379.50
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 924 (3-5), 925 (6-9), 926 (11-17), 927 (15-22),
928 (20-22), 929 (25-28), 930 (26-31), 931 (37-40),
932 (42-50), 933 (53-63), 934 (66-79), 935 (83-86),
936 (90-94), 937 (96-104), 938 (107-113),
939 (117-122), 940 (117-120), 941 (125-130),
942 (130-133), 943 (135-136), 944 (137-142),
945 (143-146);
Texture : SPARSELY PHYRIC,GLASSY MARGINS 933-934+941,PCES
924-936 COARSE-GRAINED BASALT;
Alteration : MOD
PCES 924-926+936-937+939-940+944-945,OXIDATION
ZONE PCES 934+935 WITH RED CLAY.MINS & OL ALTERED
TO RED-YELLOW CLAY.MINS;
Comments : CONTINUATION OF SUBUNIT 3C;
Vesicles : Size(mm): Percent: RARE
Phenocrysts: PLAGIOCLASE ( <2%)
OLIVINE ( <2%)
OL FRESH OR ALTERED TO DARK GREEN SMECS OR
RED-YELLOW CLAY.MINS IN OXIDIZED ZONES;
Replacement: SMECTITE
DARK GREEN OXIDIZED ZONE;
CLAY
RED-YELLOW CLAY.MINS IN OXIDIZED ZONES;
Leg : 69 Top/Bottom Interval(mm): 0/1000 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 382.00
Core: 15 Top of Core Depth (m) : 375.00
Sect: 5 Top of Section Depth(m): 381.00
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 946 (4-10), 947 (8-13), 948 (16-28),
949 (30-42), 950 (45-51), 951 (50-55), 952 (61-72),
953 (74-82), 954 (83-95), 955 (94-100);
Texture : SPARSELY PHYRIC,APHANITIC,PCES 954-955 HAS SEVERAL
GRAINSIZES POSSIBLY AUTOINCLUSION(?),PCE 953 IS
CHILLED MARGIN;
Structure : PILLOW BASALT,GLASS VEINED WITH CLAYS;
Alteration : ALT.GLAS,OL FRESH OR ALTERED;
Comments : CONTINUATION OF SUBUNIT 3C,PCE 953 HAS CONTACT AT
45 DEGREES TO DRILL WALL;
CONTINUATION OF SUBUNIT 3C;
Vesicles : Size(mm): TO 3 Percent:
Location: Filling: SMEC
VESICULAR PCE 953;
Phenocrysts: OLIVINE
Size(mm): 1-2
OL MORE COMMON & IS EITHER FRESH OR ALTERED;
PLAGIOCLASE
Size(mm): 1-2
ALL PHENOS TOTAL 1% EXCEPT FOR PCE 954 WITH ABOUT
2%, PCE 955 HAS PLAG MACROPHENOS TO 8MM;
Replacement: CLAY
Minerals Replaced: OL
GREEN;
UNIDENTIFIED
Minerals Replaced: GLASS
SMECTITE
PCE 953;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 385.50
Core: 16 Top of Core Depth (m) : 384.00
Sect: 1 Top of Section Depth(m): 384.00
LITHOLOGY: PLAG-OL-CPX SPARSELY PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 956 (2-8), 957 (10-13), 958 (16-23),
959 (26-30), 960 (33-37), 961 (40-49), 962 (50-56),
963 (58-64), 964 (66-74), 965 (75-82), 966 (84-90),
967 (94-97), 968 (101-104), 970 (105-108),
971 (111-117), 972 (118-127), 973 (126-135),
974 (138-147);
Texture : SPARSELY PHYRIC,HETEROGENEOUS,SOME OF ROCKS APPEAR
TO BE MADE UP OF 2 OR MORE MAGMAS STREAKED OR
BLENDED PLASTICALLY TOGETHER-THE CONTRASTING
MATERIALS APPEAR AS ZONES OF DIFFERENT XTLLINITY IN
THE ROCKS;
Structure : MASSIVE FLOW;
Alteration : MOD
Comments : CONTINUATION OF SUBUNIT 3C;
Vesicles :
Location: Filling: SMEC
Phenocrysts: PLAGIOCLASE
Size(mm): 1-2
OLIVINE
Size(mm): TO 1
CLINOPYROXENE ( TR%)
Size(mm): TO 6
CPX FOUND IN TRACE AMOUNTS IN PCES 961+965,ALL
PHENOS TOTAL ABOUT 1%;
Replacement: SMECTITE
GREEN;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 387.00
Core: 16 Top of Core Depth (m) : 384.00
Sect: 2 Top of Section Depth(m): 385.50
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 975 (3-25), 976 (28-38), 977 (40-46),
978 (48-53), 979 (57-65), 980 (68-79), 981 (79-94),
982 (98-103), 983 (106-117), 984 (117-122),
985 (124-139), 986 (139-145), 987 (145-149);
Texture : MOD PHYRIC;
Structure : MASSIVE BASALT,CRACKS FILLED WITH GREEN SMEC;
Alteration : MOD
IRREGULAR ALTERATION SPOTS IN PCES 975-976 & RED
ZONES OF ALTERATION IN PCES 981-982;
Comments : CONTINUATION OF SUBUNIT 3C;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 2
OLIVINE
Size(mm): TO 2
PLAG & OL TOTAL 3-4%;
Replacement: SMECTITE
GREEN;
Leg : 69 Top/Bottom Interval(mm): 0/1150 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 388.15
Core: 16 Top of Core Depth (m) : 384.00
Sect: 3 Top of Section Depth(m): 387.00
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCES 988 (2-10), 989 (12-21), 990 (20-31),
991 (30-34), 992 (36-50), 993 (50-59), 994 (60-69),
995 (70-75), 996 (75-80), 997 (82-99),
998 (101-111);
Texture : MOD PHYRIC;
Structure : CRACKS FILLED WITH GREEN & RED CLAY.MINS;
Alteration : OL ALTERED;
Comments : PCE 998 MARKS END OF SUBUNIT 3C;
Phenocrysts: PLAGIOCLASE ( 3%)
OLIVINE
OL ALTERED;
Replacement: CLAY
RED & GREEN CLAY.MINS;
Leg : 69 Top/Bottom Interval(mm): 1150/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 388.50
Core: 16 Top of Core Depth (m) : 384.00
Sect: 3 Top of Section Depth(m): 388.15
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCES 999 (118-123), 1000 (124-132), 1001 (133-136),
1002 (138-146);
Texture : PHYRIC,PCE 999 HAS ALT.GLAS MARGIN;
Alteration : OL ALTERED,ALT.GLAS MARGIN PCE 999;
Comments : PCE 999 BEGINS UNIT 4;
Vesicles : Size(mm): Percent: RARE
ABSENT OR RARE & VERY SMALL;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): TO 4
OLIVINE ( 5%)
Size(mm): TO 3
OL ALTERED;
Replacement: CLAY
Minerals Replaced: OL
RED & GREEN CLAY.MINS;
CALCITE
Minerals Replaced: OL
UNIDENTIFIED
Minerals Replaced: GLASS
PCE 999;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 390.00
Core: 16 Top of Core Depth (m) : 384.00
Sect: 4 Top of Section Depth(m): 388.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1003 (1-15), 1004 (13-22), 1005 (23-31),
1006 (33-41), 1007 (45-48), 1008 (52-61),
1009 (62-70), 1010 (73-76), 1011 (80-84),
1012 (86-96), 1013 (99-107), 1014 (109-116),
1015 (120-127), 1016 (130-138), 1017 (109-116);
Texture : MOD PHYRIC;
Structure : ABUNDANT CRACKS ARE FILLED WITH GREEN SMEC,PILLOW
BASALT;
Alteration : MOD
OL ALTERED;
Comments : CONTINUATION OF UNIT 4,PCES 1006-1009 SEEM
BRECCIATED;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): TO 3
OLIVINE ( 3%)
Size(mm): TO 3
OL ALTERED TO RED & GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
RED & GREEN;
Leg : 69 Top/Bottom Interval(mm): 0/1100 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 391.10
Core: 16 Top of Core Depth (m) : 384.00
Sect: 5 Top of Section Depth(m): 390.00
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1018 (2-8), 1019 (13-17), 1020 (20-25),
1021 (25-37), 1022 (40-43), 1023 (48-51),
1024 (55-60), 1025 (65-72), 1026 (74-79),
1027 (82-87), 1028 (89-93), 1029 (96-98),
1030 (103-107);
Texture : MOD PHYRIC;
Structure : CRACKS ARE FILLED WITH CLAY.MINS,PILLOW BASALT;
Alteration : OL ALTERED;
Comments : CONTINUATION OF UNIT 4;
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): TO 3
OLIVINE ( 3%)
Size(mm): TO 3
OL ALTERED TO RED & GREEN CLAY.MINS & CALCITE;
Replacement: CLAY
Minerals Replaced: OL
RED & GREEN CLAY.MINS;
CLAY
IN CRACKS;
CALCITE
Minerals Replaced: OL
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 394.50
Core: 17 Top of Core Depth (m) : 393.00
Sect: 1 Top of Section Depth(m): 393.00
LITHOLOGY: OL-PLAG MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1031 (2-8), 1032 (9-10), 1033 (11-13),
1034 (15-20), 1035 (24-27), 1036 (32-39),
1037 (42-48), 1038 (50-54), 1039 (56-61),
1040 (65-70), 1041 (74-79), 1042 (72-79),
1043 (83-89), 1044 (92-98), 1045 (102-107),
1046 (110-115), 1047 (118-125), 1048 (128-137),
1049 (140-147), 1050 (140-142), 1051 (144-147);
Texture : MOD PHYRIC,GLASSY MARGINS PARTLY ALTERED PCES 1031+
1038+1039,PCES 1036+1047 SPHERULITIC TEXTURE;
Structure : PILLOW BASALT,SMALL CRACKS WITH FIBROUS CARB.UNSPEC,
CRACKS(TO 2MM WIDE) ALSO HAVE GREEN SMEC;
Alteration : OL ALTERED,GLASSY MARGINS PARTLY ALTERED,NO
OXIDATION ZONATION;
Comments : CONTINUATION OF UNIT 4;
Phenocrysts: OLIVINE ( 5-7%)
Size(mm): <2
OL ALTERED TO GREEN OR RED CLAY.MINS OR
CARB.UNSPEC;
PLAGIOCLASE ( 5%)
Size(mm): <2
CHROMITE
PCES 1040+1049;
Replacement: CLAY
Minerals Replaced: OL
RED OR GREEN;
CARBONATE
Minerals Replaced: OL
UNSPEC;
SMECTITE
GREEN;
CARBONATE
FIBROUS CARB.UNSPEC IN SMALL CRACKS;
UNIDENTIFIED
Minerals Replaced: GLASS
PARTLY ALT.GLAS MARGINS;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 396.00
Core: 17 Top of Core Depth (m) : 393.00
Sect: 2 Top of Section Depth(m): 394.50
LITHOLOGY: OL-PLAG MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1052 (2-8), 1053 (12-16), 1054 (18-25),
1055 (26-31), 1056 (34-43), 1057 (46-50),
1058 (54-57), 1059 (60-64), 1060 (65-69),
1061 (64-73), 1062 (74-84), 1063 (82-85),
1064 (86-95), 1065 (99-110), 1066 (112-117),
1067 (114-117), 1068 (121-124), 1069 (127-133),
1070 (135-140), 1071 (142-148);
Texture : MOD PHYRIC,PARTLY ALT.GLAS MARGINS IN PCES 1057-
1060+1062,PCE 1071 SPHERULITIC TEXTURE;
Structure : PILLOW BASALT,VEINS OF GREEN & RED SMEC & FIBROUS
CALCITE,FRACTURED;
Alteration : MOD
PART OF PCE 1052,PCES 1055-1059,ORANGE & RED
OXIDATION ZONE(NOT INTENSE & GENERALLY FOUND IN
PILLOW MARGINS),PARTLY ALT.GLAS MARGINS IN
PCES 1057-1060+1062;
Comments : CONTINUATION OF UNIT 4;
Phenocrysts: OLIVINE ( 5-7%)
Size(mm): 2-3
OL ALTERED DOWN FULL LENGTH OF SECTION
PSEUDOMORPHED BY GREEN CLAY.MINS WITH CENTERS OF
CALCITE(RED CLAY.MINS IN OXIDIZED ZONES);
PLAGIOCLASE ( 5%)
Size(mm): 1-5
Replacement: CLAY
Minerals Replaced: OL
CLAY.MINS GREEN PSEUDOMORPHS,RED CLAY.MINS IN
OXIDIZED ZONES;
CALCITE
FIBROUS IN VEINS;
SMECTITE
RED & GREEN;
CALCITE
Minerals Replaced: OL
ALTERED OL HAS CALCITE CENTERS;
UNIDENTIFIED
Minerals Replaced: GLASS
Leg : 69 Top/Bottom Interval(mm): 0/ 850 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 396.85
Core: 17 Top of Core Depth (m) : 393.00
Sect: 3 Top of Section Depth(m): 396.00
LITHOLOGY: OL-PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1072 (4-7), 1073 (11-17), 1074 (20-27),
1075 (32-36), 1076 (40-47), 1077 (50-56),
1078 (58-63), 1079 (67-70), 1080 (73-81);
Texture : PHYRIC,FRESH GLASSY MARGIN PCE 1073;
Structure : PILLOW BASALT,SMALL CRACKS WITH FIBROUS CARB.UNSPEC,
2MM GREEN CRACK PCE 1073;
Alteration : OL ALTERED;
Comments : CONTINUATION OF UNIT 4;
Phenocrysts: OLIVINE ( 7-10%)
Size(mm): TO 3
OL ALTERED TO GREEN OR RED CLAY.MINS OR
CARB.UNSPEC;
PLAGIOCLASE ( 5%)
Size(mm): TO 5
Replacement: CLAY
Minerals Replaced: OL
RED OR GREEN CLAY.MINS;
CARBONATE
Minerals Replaced: OL
FIBROUS CARB.UNSPEC IN SMALL CRACKS;
PHILLIPSITE
Size(mm): 10
PCE 1079 HAS RADIATED PHIL;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 399.50
Core: 18 Top of Core Depth (m) : 398.00
Sect: 1 Top of Section Depth(m): 398.00
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1081 (3-7), 1082 (10-13), 1083 (15-20),
1084 (23-27), 1085 (30-33), 1086 (37-43),
1087 (46-51), 1088 (55-60), 1089 (63-67),
1090 (70-80), 1091 (82-88), 1092 (91-97),
1093 (99-107), 1094 (108-119), 1095 (117-121),
1096 (123-126), 1097 (126-131), 1098 (134-141),
1099 (142-148);
Texture : MOD PHYRIC,FINE-GRAINED INTERIOR;
Structure : PILLOW BASALT,CLAY.MINS FILL CRACKS,THIN MASSIVE
FLOWS;
Alteration : MOD
OL REPLACED COMPLETELY;
Comments : PCE 1085 MARKS BEGINNING OF UNIT 5;
Vesicles : Size(mm): TO 2 Percent: 1
Location: Filling: CLAY.MINS
LIGHT GREEN & RED CLAY.MINS FILL VESICLES;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): TO 5
OLIVINE ( 2%)
Size(mm): TO 2
OL COMPLETELY REPLACED BY RED OR GREEN CLAY.MINS;
Replacement: CLAY
Minerals Replaced: OL
RED & GREEN CLAY.MINS COMPLETELY REPLACE OL;
Leg : 69 Top/Bottom Interval(mm): 0/1100 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 400.60
Core: 18 Top of Core Depth (m) : 398.00
Sect: 2 Top of Section Depth(m): 399.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1100 (2-12), 1101 (14-17), 1102 (20-25),
1103 (26-31), 1104 (34-37), 1105 (42-52),
1106 (54-60), 1107 (63-66), 1108 (68-73),
1109 (75-81), 1110 (84-90), 1111 (93-95),
1112 (98-106);
Texture : MOD PHYRIC,FINE-GRAINED,MICROLITIC,VARIOLITIC,PCE
1112 IS MORE FINE-GRAINED BUT HOLOXTLLINE-MICROLITIC
OR OPHITIC;
Structure : PILLOW BASALT,RED & GREEN CLAY.MINS FILL CRACKS;
Alteration : OL COMPLETELY REPLACED;
Comments : CONTINUATION OF UNIT 5;
Vesicles : Size(mm): TO 1 Percent: 1
Location: Filling: CLAY.MINS
GREEN & RED CLAY.MINS FILL VESICLES;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): TO 5
OLIVINE ( 2%)
Size(mm): TO 2
OL COMPLETELY REPLACED BY RED OR GREEN CLAY.MINS;
Replacement: CLAY
Minerals Replaced: OL
RED & GREEN CLAY.MINS COMPLETELY REPLACE OL;
CLAY
RED & GREEN CLAY.MINS IN CRACKS & VESICLES;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 404.50
Core: 19 Top of Core Depth (m) : 403.00
Sect: 1 Top of Section Depth(m): 403.00
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCES 1113 (2-8), 1114 (12-18), 1115 (18-24),
1116 (21-28), 1117 (32-36), 1118 (39-45),
1119 (47-51), 1120 (52-58), 1121 (61-65),
1122 (67-76), 1123 (78-81), 1124 (84-90),
1125 (91-95), 1126 (96-103), 1127 (105-113),
1128 (116-123), 1129 (126-131), 1130 (134-139),
1131 (143-149);
Texture : MOD PHYRIC,FINE-GRAINED,MICROLITIC,VARIOLITIC,
INTERSERTAL,UNIFORM THROUGHOUT;
Structure : CRACKS FILLED WITH GREEN CLAY.MINS;
Alteration : MOD
OL IS REPLACED;
Comments : CONTINUATION OF UNIT 5;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 4-7%)
Size(mm): TO 4
OLIVINE ( 2-3%)
Size(mm): TO 2
OL COMPLETELY REPLACED BY RED OR LIGHT GREEN
CLAY.MINS;
Replacement: CLAY
Minerals Replaced: OL
RED & GREEN;
CLAY
FILLS CRACKS;
Leg : 69 Top/Bottom Interval(mm): 0/ 800 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 405.30
Core: 19 Top of Core Depth (m) : 403.00
Sect: 2 Top of Section Depth(m): 404.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCES 1132 (2-6), 1133 (8-13), 1134 (16-20),
1135 (22-27), 1136 (28-34), 1137 (36-38),
1138 (41-45), 1139 (46-50), 1140 (52-55),
1141 (58-60), 1142 (63-65), 1143 (68-72),
1144 (75-78);
Texture : MOD PHYRIC,PCES 1132-1134 HOLOXTLLINE & MICROLITIC,
PCES 1139-1144 FINE-GRAINED & INTERSERTAL,PCES
1135+1136 LOOKS LIKE ROCK OF CORE 17;
Structure : CRACKS FILLED WITH CLAY.MINS IN PCES 1132-1134;
Alteration : MOD
PCES 1132-1134 CLAY.MINS AFTER OL,PCES 1139-1144
OL CONVERTED INTO GREEN SMEC;
Comments : PCES 1132-1138 MAKE UP UNIT 6,PCES 1139-1144 MAKE UP
UNIT 7,PCES 1135+1136 BRECCIA WHICH LOOKS LIKE THE
ROCK OF CORE 17;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): TO 4
PCES 1132-1138;
PLAGIOCLASE ( 3-4%)
Size(mm): TO 3
PCES 1139-1144;
OLIVINE ( 3%)
Size(mm): 2-3
PCES 1132-1138,OL CONVERTED TO CLAY.MINS;
OLIVINE ( 1-2%)
Size(mm): TO 2
PCES 1139-1144,CONVERTED TO GREEN SMEC;
Replacement: CLAY
Minerals Replaced: UNIDENT
FILLS CRACKS & CEMENTS BRECCIA;
SMECTITE
Minerals Replaced: OL
GREEN;
CLAY
Minerals Replaced: OL
PCES 1132-1138;
Leg : 69 Top/Bottom Interval(mm): 800/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 406.00
Core: 19 Top of Core Depth (m) : 403.00
Sect: 2 Top of Section Depth(m): 405.30
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCES 1145 (80-87), 1146 (89-93), 1147 (96-101),
1148 (103-107), 1149 (109-116), 1150 (118-123),
1151 (125-131), 1152 (132-140), 1153 (143-147);
Texture : PHYRIC;
Alteration : MOD
Comments : PCE 1145 BEGINS UNIT 8;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): TO 4
OLIVINE ( 3%)
Size(mm): 2-3
CLINOPYROXENE ( 2-3%)
Size(mm): <1
Leg : 69 Top/Bottom Interval(mm): 0/ 300 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 406.30
Core: 19 Top of Core Depth (m) : 403.00
Sect: 3 Top of Section Depth(m): 406.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCES 1154 (2-7), 1155 (10-14), 1156 (17-21),
1157 (15-19);
Texture : PHYRIC,HOLOXTLLINE,MICROLITIC,SAME AS CORE 19-1;
Structure : VEINS OF GREEN SMEC;
Alteration : MOD
OL ALTERED;
Comments : CONTINUATION OF UNIT 8;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): TO 4
OLIVINE ( 3%)
Size(mm): TO 3
CLINOPYROXENE ( 1%)
Size(mm): TO 2
Replacement: SMECTITE
Minerals Replaced: OL
GREEN PSEUDOMORPHS;
Leg : 69 Top/Bottom Interval(mm): 0/ 500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 412.50
Core: 20 Top of Core Depth (m) : 412.00
Sect: 1 Top of Section Depth(m): 412.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1158 (2-5), 1159 (6-13), 1160 (15-20),
1161 (22-29), 1162 (32-35), 1163 (37-41),
1164 (44-47);
Texture : PHYRIC;
Structure : CRACKS FILLED WITH GREEN SMEC;
Alteration : MOD
OL ALTERED;
Comments : PCE 1164 MARKS END OF UNIT 8;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): TO 4
OLIVINE ( 3%)
Size(mm): TO 3
CLINOPYROXENE ( 1%)
Size(mm): TO 2
Replacement: SMECTITE
Minerals Replaced: OL
GREEN;
SMECTITE
GREEN,FILLS CRACKS;
Leg : 69 Top/Bottom Interval(mm): 500/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 413.50
Core: 20 Top of Core Depth (m) : 412.00
Sect: 1 Top of Section Depth(m): 412.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1165 (50-53), 1166 (55-62), 1167 (64-67),
1168 (70-74), 1169 (75-82), 1170 (84-90),
1171 (90-95), 1172 (98-105), 1173 (106-120),
1174 (121-125), 1175 (127-130), 1176 (133-136),
1177 (138-140), 1178 (142-150);
Texture : APHYRIC,HOLOXTLLINE,COARSE-GRAINED;
Structure : CRACKS FILLED WITH GREEN OR RED CLAY.MINS OR
CALCITE;
Alteration : MOD
OL ALTERED TO CLAY.MINS,RED OXIDATION ZONES
PRESENT IN ALMOST EVERY SAMPLE;
Comments : PCE 1165 BEGINS UNIT 9;
Groundmass : OLIVINE
ALTERED;
Replacement: CLAY
Minerals Replaced: OL
CLAY
Minerals Replaced: UNIDENT
RED OR GREEN CLAY.MINS FILL CRACKS;
CALCITE
Leg : 69 Top/Bottom Interval(mm): 0/ 600 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 421.60
Core: 21 Top of Core Depth (m) : 421.00
Sect: 1 Top of Section Depth(m): 421.00
LITHOLOGY: BASALTIC BRECCIA;
Piece No. : PCES 1179 (3-7), 1180 (10-16), 1181 (18-26),
1182 (29-36), 1183 (39-43), 1184 (47-52),
1185 (54-56), 1186 (57-60);
Texture : BASALTIC BRECCIA,FRAGMENTS OF APHYRIC HOLOXTLLINE
MATERIAL;
Structure : ANGULAR FRAGMENTS CEMENTED IN DARK GREEN MATRIX OF
SMEC(POSSIBLY SOME CHLOR?),PCE 1182 HAS
SLICKENSIDES IN SMEC/CHLOR(?) INDICATING REVERSED
FAULTING AT 45 DEGREES FROM VERTICAL(SIMILAR FAULTS
FOUND IN PCE 1183 BUT FAULT PLANE IS SUBHORIZONTAL),
VEINS FILLED BY GREEN OR RED SMEC & SOMETIMES HAVE A
CORE OF CALCITE;
Alteration : MOD
Comments : CONTINUATION OF UNIT 9;
Replacement: SMECTITE
DARK GREEN,CEMENTS BRECCIA,GREEN OR RED IN VEINS,
LIGHT GREEN SPECKS OR SPOTS OF SMEC IN PCE 1180;
CALCITE
SOMETIMES FOUND AT CORE OF VEINS;
CHLORITE
ID CHLOR UNCERTAIN;
Leg : 69 Top/Bottom Interval(mm): 600/1500 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 422.50
Core: 21 Top of Core Depth (m) : 421.00
Sect: 1 Top of Section Depth(m): 421.60
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1187 (62-68), 1188 (70-78), 1189 (80-88),
1190 (91-100), 1191 (85-89), 1192 (92-99),
1193 (102-107), 1194 (110-121), 1195 (123-134),
1196 (132-140), 1197 (143-147), 1198 (143-149);
Texture : APHYRIC,COARSE-GRAINED;
Alteration : MOD
OXIDIZED RIMS ARE COMMON & EXTENSIVE,OL ALTERED;
Comments : CONTINUATION OF UNIT 9;
Phenocrysts: PLAGIOCLASE
Size(mm): 1-2
OLIVINE
Size(mm): 1
PHENOS TOTAL <1%,OL ALTERED TO GREEN SMEC IN
REDUCED ZONES OR RED MATERIALS IN OXIDIZED RIMS;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN;
UNIDENTIFIED
Minerals Replaced: OL
RED UNIDENT MATERIAL IN OXIDIZED RIMS;
Leg : 69 Top/Bottom Interval(mm): 0/ 400 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 422.90
Core: 21 Top of Core Depth (m) : 421.00
Sect: 2 Top of Section Depth(m): 422.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1199 (2-8), 1200 (9-15), 1201 (17-21),
1202 (22-23), 1203 (27-35), 1204 (35-38),
1205 (39-40), 1206 (39-40);
Texture : APHYRIC;
Alteration : MOD
WELL DEVELOPED OXIDATION,OL ALTERED;
Comments : PCE 1206 MARKS END OF UNIT 9;
Phenocrysts: OLIVINE ( RARE%)
ALTERED TO DARK GREEN OR RED CLAY.MINS;
Replacement: CLAY
Minerals Replaced: OL
GREEN OR RED CLAY.MINS;
Leg : 69 Top/Bottom Interval(mm): 400/1500 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 424.00
Core: 21 Top of Core Depth (m) : 421.00
Sect: 2 Top of Section Depth(m): 422.90
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCES 1207 (45-50), 1208 (54-63), 1209 (66-74),
1210 (77-83), 1211 (87-91), 1212 (94-99),
1213 (103-110), 1214 (114-121), 1215 (125-130),
1216 (134-136), 1217 (136-138), 1218 (142-147);
Texture : PHYRIC;
Alteration : MOD
OL ALTERED,STRONG OXIDATION IN PCES 1207-1208 & IS
LOWER IN OTHER PCES;
Comments : PCE 1207 BEGINS UNIT 10;
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): TO 2
OLIVINE ( 5%)
Size(mm): TO 3
OL ALTERED TO DARK GREEN OR YELLOW-RED CLAY.MINS &
CARB.UNSPEC;
Replacement: CLAY
Minerals Replaced: OL
OL ALTERED TO DARK GREEN OR YELLOW-RED CLAY.MINS;
CARBONATE
Minerals Replaced: OL
UNSPEC;
Leg : 69 Top/Bottom Interval(mm): 0/ 270 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 424.27
Core: 21 Top of Core Depth (m) : 421.00
Sect: 3 Top of Section Depth(m): 424.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCES 1219 (2-8), 1220 (11-17), 1221 (19-26);
Texture : PHYRIC,APHANITIC,GLASS ON PCE 1221;
Structure : PCES 1219+1220 STRONGLY VEINED BY FINE SMEC VEINS
RAMIFYING PARTS OF EACH SAMPLE;
Alteration : SLIGHTLY
ALT.GLAS PCE 1221,NO OXIDATION ZONES;
Comments : PCE 1221 MARKS END OF UNIT 10,DARK GRAY BASALT;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): 2-6
OLIVINE ( 3%)
Size(mm): 3-5
CLINOPYROXENE ( 1%)
Size(mm): 1-5
OL ALTERED TO GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN;
SMECTITE
VEINS;
UNIDENTIFIED
Minerals Replaced: GLASS
PCE 1221;
Leg : 69 Top/Bottom Interval(mm): 270/1500 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 425.50
Core: 21 Top of Core Depth (m) : 421.00
Sect: 3 Top of Section Depth(m): 424.27
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1222 (27-35), 1223 (35-41), 1224 (43-52),
1225 (52-57), 1226 (58-67), 1227 (68-73),
1228 (73-75), 1229 (78-83), 1230 (85-91),
1231 (92-100), 1232 (101-108), 1233 (109-118),
1234 (120-127), 1235 (128-139), 1236 (140-149);
Texture : APHYRIC,HOLOXTLLINE,MED-TO-FINE-GRAINED,PCES 1229+
1230 HAVE BOTH MED & VERY FINE-GRAINED BASALTS SIDE
BY SIDE AS AUTOINTRUSIONS-SAME AS THAT FOUND IN CORE
15-5 WITH SHARP CONTACTS BETWEEN THE TWO (FINE
INTRUDES COARSE?);
Structure : FINE SMEC VEINING PRESENT-VEIN OFFSET SLIGHTLY IN
PCE 1229;
Alteration : MOD
OXIDIZED ZONE IN PCES 1233-1236;
Comments : PCE 1222 BEGINS UNIT 11;
Phenocrysts: COMBINATION ( <1%)
Size(mm): 1-2
PLAG & OL,OL ALTERED;
Replacement: SMECTITE
IN VEINS;
UNIDENTIFIED
Minerals Replaced: OL
Leg : 69 Top/Bottom Interval(mm): 0/ 350 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 425.85
Core: 21 Top of Core Depth (m) : 421.00
Sect: 4 Top of Section Depth(m): 425.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1237 (3-7), 1238 (9-15), 1239 (12-16),
1240 (16-19), 1241 (18-21), 1242 (23-31);
Texture : APHYRIC,CONTINUATION OF CORE 21-3,COARSE-GRAINED;
Structure : CRACK FILLED WITH GREEN CLAY.MINS;
Alteration : MOD
OXIDATION ZONE PCES 1237-1242;
Comments : PCE 1242 MARKS END OF UNIT 11;
Vesicles : Size(mm): Percent: 0
Replacement: CLAY
GREEN CLAY.MINS IN CRACKS;
Leg : 69 Top/Bottom Interval(mm): 350/ 600 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 426.10
Core: 21 Top of Core Depth (m) : 421.00
Sect: 4 Top of Section Depth(m): 425.85
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCES 1243 (35-42), 1244 (45-49), 1245 (52-57);
Texture : PHYRIC,SAME AS UNIT 10 OF CORES 21-2 & 21-3;
Comments : PCES 1243-1245 MAKE UP UNIT 12;
Leg : 69 Top/Bottom Interval(mm): 600/1050 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 426.55
Core: 21 Top of Core Depth (m) : 421.00
Sect: 4 Top of Section Depth(m): 426.10
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1246 (61-64), 1247 (68-73), 1248 (77-81),
1249 (82-87), 1250 (90-94), 1251 (96-104);
Texture : APHYRIC,FRESH GLASSY MARGIN PCES 1246+1249-1251;
Structure : PILLOW BASALT;
Comments : PCES 1246-1251 MAKE UP UNIT 13;
Phenocrysts: OLIVINE ( RARE%)
Leg : 69 Top/Bottom Interval(mm): 1050/1500 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 427.00
Core: 21 Top of Core Depth (m) : 421.00
Sect: 4 Top of Section Depth(m): 426.55
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1252 (106-111), 1253 (111-119), 1254 (120-123),
1255 (128-131), 1256 (136-142), 1257 (144-147);
Texture : MOD PHYRIC,FRESH GLASS PCES 1251-1252;
Structure : PILLOW BASALT;
Alteration : OL ALTERED;
Comments : PCE 1251 BEGINS UNIT 14;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): 5
OLIVINE ( 3%)
Size(mm): 3
OL ALTERED TO DARK GREEN OR RED CLAY.MINS & CARB.
UNSPEC WITH FRESH RELICS;
Replacement: CLAY
Minerals Replaced: OL
DARK GREEN OR RED CLAY.MINS;
CARBONATE
Minerals Replaced: OL
UNSPEC,WITH FRESH RELICS;
Leg : 69 Top/Bottom Interval(mm): 0/ 100 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 427.10
Core: 21 Top of Core Depth (m) : 421.00
Sect: 5 Top of Section Depth(m): 427.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCES 1258 (2-7);
Texture : PHYRIC,SIMILAR TO UNIT 14 OF CORE 21-4;
Alteration : MOST OL ALTERED;
Comments : CONTINUATION OF UNIT 14;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): 2-3
OLIVINE ( 3%)
Size(mm): 1-2
CLINOPYROXENE ( <1%)
Size(mm): 1-4
MOST OL ALTERED TO GREEN CLAY.MINS(RARELY RED)
WITH CALCITE CORES IN LARGER PSEUDOMORPHS;
Replacement: CLAY
Minerals Replaced: OL
GREEN CLAY.MINS(RARELY RED);
CALCITE
Minerals Replaced: OL
CALCITE CORES IN LARGER PSEUDOMORPHS;
Leg : 69 Top/Bottom Interval(mm): 100/ 900 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 427.90
Core: 21 Top of Core Depth (m) : 421.00
Sect: 5 Top of Section Depth(m): 427.10
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCES 1259 (9-13), 1260 (15-18), 1261 (21-27),
1262 (29-33), 1263 (35-40), 1264 (41-46),
1266 (65-70), 1267 (72-79), 1268 (80-86);
Texture : PHYRIC,GLASSY RIM ON PCES 1259+1260,PCES 1261+1262
ARE SLIGHTLY LESS PORPHYRITIC THAN THE OTHER PCES;
Structure : PCES 1266-1268 FRACTURED & STRONGLY VEINED;
Alteration : OL ALTERED OR FRESH;
Comments : PCE 1264 MARKS END OF UNIT 14,PCE 1266 BEGINS UNIT
16;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): 2-3
OLIVINE ( 3%)
Size(mm): 1-2
OL CAN BE FRESH OR ALTERED TO GREEN CLAY.MINS;
CLINOPYROXENE ( TR%)
Size(mm): 1-4
Replacement: CLAY
Minerals Replaced: OL
GREEN;
PRESENT IN LOWER PART OF CORE;
Leg : 69 Top/Bottom Interval(mm): 470/ 650 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 427.65
Core: 21 Top of Core Depth (m) : 421.00
Sect: 5 Top of Section Depth(m): 427.47
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1265 (47-64);
Texture : APHYRIC,VERY FINE-GRAINED,PCE 1265 IS MADE UP OF
SEVERAL FRAGMENTS,FRESH GLASS ON ONE OF THE
FRAGMENTS,DOES NOT APPEAR TO BE A CHILLED PORTION OF
THE REMAINDER OF THE SECTION;
Structure : POSSIBLY A DIKE(?);
Alteration : MOST OL ALTERED;
Comments : PCE 1265 IS UNIT 15;
Phenocrysts: COMBINATION
Size(mm): <1
FEW OL & PLAG MICROPHENOS,OL PSEUDOMORPHED BY DARK
GREEN CLAY.MINS,SOME FRESH CLOSE TO MARGIN AREA,
PHENO CONCENTRATION NEAR GLASS IS 4-5%(PLAG-OL-
CPX?);
Replacement: CLAY
Minerals Replaced: OL
PSEUDOMORPHS,DARK GREEN;
Leg : 69 Top/Bottom Interval(mm): 0/ 950 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 430.95
Core: 22 Top of Core Depth (m) : 430.00
Sect: 1 Top of Section Depth(m): 430.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1269 (2-10), 1270 (10-18), 1271 (22-28),
1272 (31-37), 1273 (40-44), 1274 (48-52),
1275 (56-65), 1276 (70-75), 1277 (78-83),
1278 (87-92);
Texture : PHYRIC,GLASSY RIM ON PCE 1278;
Structure : PILLOW BASALT;
Alteration : OL FRESH OR ALTERED;
Comments : CONTINUATION OF UNIT 16;
Phenocrysts: PLAGIOCLASE ( 8%)
Size(mm): 2-3
OLIVINE ( 5%)
Size(mm): 2
CLINOPYROXENE ( 1%)
Size(mm): TO 5
OL FRESH OR ALTERED TO DARK GREEN OR RED CLAY.MINS
& CARB.UNSPEC;
Replacement: CLAY
Minerals Replaced: OL
DARK GREEN CLAY.MINS;
CARBONATE
Minerals Replaced: OL
CARB.UNSPEC;
Leg : 69 Top/Bottom Interval(mm): 950/1500 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 431.50
Core: 22 Top of Core Depth (m) : 430.00
Sect: 1 Top of Section Depth(m): 430.95
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1279 (95-101), 1280 (103-109), 1281 (113-118),
1282 (122-125), 1283 (129-137), 1284 (140-148);
Texture : APHYRIC,FINE-GRAINED,FRESH GLASSY MARGINS;
Structure : PILLOW BASALT;
Alteration : OL ALTERED;
Comments : CONTINUATION OF UNIT 16;
Groundmass : OLIVINE
OL ALTERED TO DARK GREEN CLAY.MINS;
Replacement: CLAY
Minerals Replaced: OL
DARK GREEN;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 433.00
Core: 22 Top of Core Depth (m) : 430.00
Sect: 2 Top of Section Depth(m): 431.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1285 (3-13), 1286 (16-20), 1287 (21-25),
1288 (26-33), 1289 (35-43), 1290 (45-53),
1291 (55-63), 1292 (65-70), 1293 (73-79),
1294 (81-88), 1295 (93-97), 1296 (101-108),
1297 (110-116), 1298 (118-125), 1299 (128-138),
1300 (140-148);
Texture : PHYRIC,UNIFORM THROUGHOUT,GLASS RIM ON PCE 1298,
SIMILAR TO CORE 22-1;
Structure : PILLOW BASALT,PCES 1290-1293 DISSECTED BY HAIRLINE
FRACTURES FILLED BY GREEN SMEC;
Alteration : OL FRESH OR ALTERED,ALT.GLAS ON PCE 1298,TRACE OF
OXIDATION ON SURFACES;
Comments : CONTINUATION OF UNIT 16;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): 2-5
OLIVINE ( 5%)
Size(mm): 1-2
OL EITHER FRESH OR COMPLETELY ALTERED TO RED OR
GREEN CLAY.MINS & SOMETIMES PSEUDOMORPHS HAVE
CALCITE CENTERS;
CLINOPYROXENE ( 1%)
Size(mm): 5-7
Replacement: CLAY
Minerals Replaced: OL
RED OR GREEN CLAY.MINS;
PHILLIPSITE
ON SURFACE OF PCE 1291;
SMECTITE
FILLS FRACTURES OF PCES 1290-1293;
CALCITE
SOME PSEUDOMORPHED OL HAVE CALICTE CENTERS;
UNIDENTIFIED
Minerals Replaced: GLASS
GLASS ALMOST COMPLETELY ALTERED ON PCE 1298;
Leg : 69 Top/Bottom Interval(mm): 0/ 800 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 433.80
Core: 22 Top of Core Depth (m) : 430.00
Sect: 3 Top of Section Depth(m): 433.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1301 (2-10), 1302 (14-19), 1303 (20-24),
1304 (28-35), 1305 (38-49), 1306 (53-58),
1307 (61-70), 1308 (73-80);
Texture : PHYRIC,SIMILAR TO CORES 22-1 & 22-2;
Structure : CALCITE & LIGHT GREEN SMEC FILLS CRACKS,PILLOW
BASALT;
Alteration : MOD
OL REPLACED;
Comments : CONTINUATION OF UNIT 16;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): TO 4
OLIVINE ( 3%)
Size(mm): 3
OL REPLACED BY CALCITE & LIGHT GREEN SMEC;
CLINOPYROXENE ( 3%)
Size(mm): 3
Replacement: CALCITE
Minerals Replaced: OL
SMECTITE
Minerals Replaced: OL
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 440.50
Core: 23 Top of Core Depth (m) : 439.00
Sect: 1 Top of Section Depth(m): 439.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1309 (1-4), 1310 (12-14), 1311 (10-14),
1312 (15-20), 1313 (22-26), 1315 (33-42),
1316 (42-50), 1317 (50-54), 1318 (56-61),
1319 (63-72), 1320 (71-78), 1321 (78-82),
1322 (84-92), 1323 (93-98), 1324 (100-103),
1325 (106-109), 1326 (112-118), 1327 (122-125),
1328 (128-132), 1329 (136-137), 1330 (141-148);
Texture : PHYRIC,SIMILAR TO CORES 22-1 THRU 22-3;
Structure : PILLOW BASALT,CRACKS FILLED WITH GREEN SMEC &
CARB.UNSPEC;
Alteration : MOD
RED OXIDATION ZONE IN PCE 1327,OL CONVERTED;
Comments : CONTINUATION OF UNIT 16,PCE 1327 APPEARS TO BE AN
ERRATIC FROM THE ROCK TYPES OF CORES 20 & 21;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): TO 4
OLIVINE ( 3%)
Size(mm): 3
OL CONVERTED TO GREEN SMEC & RARE CARB.UNSPEC;
CLINOPYROXENE ( 3%)
Size(mm): 3
Replacement: SMECTITE
Minerals Replaced: OL
GREEN;
CARBONATE ( RARE%)
Minerals Replaced: OL
CARB.UNSPEC;
COMBINATION
GREEN SMEC & CARB.UNSPEC FILLS CRACKS;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 449.50
Core: 24 Top of Core Depth (m) : 448.00
Sect: 1 Top of Section Depth(m): 448.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1331 (2-10), 1332 (12-18), 1333 (20-25),
1334 (28-34), 1335 (35-40), 1336 (40-46),
1337 (48-50), 1338 (52-56), 1339 (59-67),
1340 (70-75), 1341 (77-81), 1342 (83-87),
1343 (87-92), 1344 (92-97), 1345 (95-99),
1346 (105-108), 1347 (110-115), 1348 (118-123),
1349 (126-132), 1351 (134-141), 1352 (141-145),
1353 (145-148);
Texture : PHYRIC,GLASSY AT PILLOW MARGINS TO INTERSERTAL IN
INTERIOR,GLASSY MARGINS IN PCES 1331+1339+1341-1343+
1346-1347+1349,SIMILAR TO CORE 23-1;
Structure : PILLOW BASALT,CRACKS FILLED WITH GREEN OR BROWN
CLAY.MINS;
Alteration : MOD
OL REPLACED;
Comments : CONTINUATION OF UNIT 16;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): TO 5
OLIVINE ( 4%)
Size(mm): TO 5
OL COMPLETELY REPLACED BY GREEN & BROWN SMEC &
CALCITE;
CLINOPYROXENE ( 2%)
Size(mm): TO 3
Replacement: SMECTITE
Minerals Replaced: OL
GREEN & BROWN;
CALCITE
Minerals Replaced: OL
CLAY
GREEN & BROWN(RARELY);
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 451.00
Core: 24 Top of Core Depth (m) : 448.00
Sect: 2 Top of Section Depth(m): 449.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1352 (2-10), 1353 (10-15), 1354 (12-19),
1355 (20-25), 1356 (25-33), 1357 (34-38),
1358 (38-44), 1359 (47-50), 1360 (53-56),
1361 (58-66), 1362 (65-72), 1363 (73-75),
1364 (77-82), 1365 (85-90), 1366 (93-97),
1367 (98-105), 1368 (104-107), 1369 (108-110),
1370 (110-120), 1371 (120-130), 1372 (130-136),
1373 (137-143), 1374 (144-148);
Texture : PHYRIC,GLASSY AT MARGINS & INTERSERTAL IN INTERIOR,
SIMILAR TO CORE 24-1;
Structure : PILLOW BASALT,CRACKS FILLED WITH GREEN OR RED
(RARELY) CLAY.MINS;
Alteration : MOD
OL COMPLETELY REPLACED,PCE 1373 HAS RED ZONE OF
OXIDATION;
Comments : CONTINUATION OF UNIT 16;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): TO 4
OLIVINE ( 3%)
Size(mm): 3
CLINOPYROXENE ( 2%)
Size(mm): 3
OL COMPLETELY REPLACED BY SMEC & CARB.UNSPEC;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Minerals Replaced: OL
CARB.UNSPEC;
CLAY
GREEN,RED(RARELY);
Leg : 69 Top/Bottom Interval(mm): 0/1150 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 452.15
Core: 24 Top of Core Depth (m) : 448.00
Sect: 3 Top of Section Depth(m): 451.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1375 (2-7), 1376 (8-12), 1377 (14-20),
1378 (19-27), 1379 (28-34), 1380 (34-39),
1381 (40-44), 1382 (44-48), 1383 (51-56),
1384 (58-63), 1385 (65-70), 1386 (71-82),
1387 (83-87), 1388 (89-93), 1389 (96-97),
1390 (100-105), 1391 (105-112);
Texture : PHYRIC,GLASSY NEAR PILLOW MARGINS & INTERSERTAL IN
INTERIOR;
Structure : PILLOW BASALT,GREEN & RED CLAY.MINS & CALCITE FILL
CRACKS;
Alteration : MOD
OL COMPLETELY ALTERED;
Comments : PCE 1391 ENDS UNIT 16;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): TO 4
OLIVINE ( 4%)
Size(mm): TO 3
OL COMPLETELY REPLACED BY RED & GREEN CLAY.MINS &
CALCITE;
CLINOPYROXENE ( 2%)
Size(mm): TO 3
Replacement: CLAY
Minerals Replaced: OL
RED & GREEN CLAY.MINS;
CALCITE
Minerals Replaced: OL
COMBINATION
RED & GREEN CLAY.MINS & CALCITE FILL CRACKS;
Leg : 69 Top/Bottom Interval(mm): 1150/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 452.50
Core: 24 Top of Core Depth (m) : 448.00
Sect: 3 Top of Section Depth(m): 452.15
LITHOLOGY: PLAG-OL-CPX SPARSELY PHYRIC TO APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1392 (115-120), 1393 (124-136), 1394 (140-146);
Texture : SPARSELY PHYRIC TO APHYRIC,FINE-GRAINED,GLASSY
MARGINS;
Structure : PILLOW BASALT;
Alteration : MOD TO EXT
GLASSY MARGINS FRESH,RED & YELLOW & GRAY ZONES OF
ALTERATION;
Comments : PCE 1392 BEGINS UNIT 17,PCE 1393 MADE UP OF SEVERAL
SMALL FRAGMENTS;
Phenocrysts: PLAGIOCLASE
OLIVINE
Replacement: UNIDENTIFIED
ALTERATION ZONES;
Leg : 69 Top/Bottom Interval(mm): 0/ 250 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 452.75
Core: 24 Top of Core Depth (m) : 448.00
Sect: 4 Top of Section Depth(m): 452.50
LITHOLOGY: PLAG SPARSELY PHYRIC TO APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1395 (3-8), 1396 (10-16), 1397 (18-22);
Texture : SPARSELY PHYRIC TO APHYRIC,FINE-GRAINED,SIMILAR TO
BOTTOM OF CORE 24-3;
Structure : PILLOW BASALT,CRACKS FILLED WITH GREEN & RED
CLAY.MINS;
Alteration : MOD
RED & YELLOW & GRAY OXIDATION ZONES;
Comments : CONTINUATION OF UNIT 17;
Phenocrysts: PLAGIOCLASE
Size(mm): <3
SPARSE;
Replacement: CLAY
RED & GREEN CLAY.MINS;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 458.50
Core: 25 Top of Core Depth (m) : 457.00
Sect: 1 Top of Section Depth(m): 457.00
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1398 (2-8), 1399 (10-13), 1400 (16-20),
1401 (23-27), 1402 (32-37), 1403 (40-44),
1404 (48-52), 1405 (53-59), 1406 (60-66),
1407 (60-66), 1408 (68-73), 1409 (74-79),
1410 (80-84), 1411 (88-90), 1412 (93-98),
1413 (101-107), 1414 (110-113), 1415 (114-116),
1416 (120-121), 1417 (125-126), 1418 (130-138),
1419 (141-143), 1420 (146-149);
Texture : APHYRIC,FINE-GRAINED,PCES 1400+1413 HAVE GLASS RIMS,
PCES 1415-1420 ARE COARSE-GRAINED,SIMILAR TO CORE
24-4,PCES 1404+1405+1414 HAVE SPHERULITIC TEXTURE;
Structure : PILLOW BASALT;
Alteration : MOD
PCES 1402+1405-1407+1418,GLASSY MARGINS ARE FRESH,
OL ALTERED;
Comments : CONTINUATION OF UNIT 17;
Phenocrysts: OLIVINE
MICROPHENOS,ALTERED TO BLUE-GREEN & DARK GREEN &
YELLOW-RED CLAY.MINS;
Replacement: CLAY
Minerals Replaced: OL
BLUE-GREEN,DARK GREEN,YELLOW-RED;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 460.00
Core: 25 Top of Core Depth (m) : 457.00
Sect: 2 Top of Section Depth(m): 458.50
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1421 (2-12), 1422 (13-20), 1423 (22-27),
1424 (28-31), 1425 (33-38), 1426 (41-45),
1427 (48-50), 1428 (53-60), 1429 (62-70),
1430 (70-78), 1431 (78-85), 1432 (85-87),
1433 (90-93), 1434 (93-100), 1435 (101-108),
1436 (110-115), 1437 (117-122), 1438 (125-130),
1439 (131-139), 1440 (142-148);
Texture : APHYRIC,HOLOXTLLINE,FINE-GRAINED,GLASS IN PCES
1427+1436,PCE 1421 IS COARSER-GRAINED THAN INTERIOR
OF COMPLETE PILLOW OF THIS SECTION(IE,PCE 1433);
Structure : PILLOW BASALT,FINE SMEC-FILLED CRACKS (RED OR GREEN
OR COMBINATION OF THE TWO),PCES 1427-1436 MAKE UP
ONE PILLOW FLOW;
Alteration : MOD
PCE 1440(DARK RIM TO BASALT INDICATES ALTERATION),
OL ALTERED(EXCEPT FOR FRESH OL XTLS IN MARGIN OF
PCE 1429),ALT.GLAS IN PCE 1436,FRESH GLASS IN PCE
1427;
Comments : LIGHT-MEDIUM GRAY BASALT,CONTINUATION OF UNIT 17;
Groundmass : OLIVINE
Size(mm): 1-2
FRESH XTLS IN MARGIN OF PCE 1429;
Phenocrysts: OLIVINE ( 1%)
Size(mm): TO 0.5
ALTERED MICROPHENOS;
Replacement: SMECTITE
RED OR GREEN OR COMBINATION OF BOTH;
CLAY
Minerals Replaced: GLASS
PCE 1436;
Leg : 69 Top/Bottom Interval(mm): 0/ 600 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 460.60
Core: 25 Top of Core Depth (m) : 457.00
Sect: 3 Top of Section Depth(m): 460.00
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1441 (2-8), 1442 (10-16), 1443 (21-22),
1444 (28-35), 1445 (38-44), 1446 (47-56);
Texture : APHYRIC,FINE-GRAINED,GLASS IN PCE 1442,CONTINUATION
OF CORES 25-1 & 25-2;
Structure : PILLOW BASALT;
Alteration : FRESH
PCES 1443+1445,FRESH GLASS IN PCE 1442;
MOD
PCES 1441-1442+1444+1446,DARK OXIDATION ZONES,OL
ALTERED TO DARK GREEN CLAY.MINS(YELLOW-RED IN
OXIDATION ZONES);
Comments : LIGHT GRAY BASALT,CONTINUATION OF UNIT 17;
Phenocrysts: OLIVINE
ALTERED MICROPHENOS,ALTERED TO CLAY.MINS;
Replacement: CLAY
Minerals Replaced: OL
OL MICROPHENOS ALTERED TO RED CLAY.MINS OR YELLOW-
RED IN OXIDATION ZONES;
Leg : 69 Top/Bottom Interval(mm): 0/1150 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 464.15
Core: 26 Top of Core Depth (m) : 463.00
Sect: 1 Top of Section Depth(m): 463.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1447 (3-6), 1448 (12-17), 1449 (19-25),
1450 (28-37), 1451 (42-47), 1452 (51-55),
1453 (60-68), 1454 (71-78), 1455 (82-87),
1456 (91-97), 1457 (101-105), 1458 (109-114);
Texture : APHYRIC,PCE 1447 COARSE-GRAINED,PCES 1448-1458 FINE-
GRAINED,PCE 1456 HAS FRESH GLASS;
Alteration : MOD
PCES 1447-1448+1453-1455,OL ALTERED TO DARK GREEN
SMEC OR YELLOW-RED SMEC(IN OXIDATION ZONE);
FRESH
PCES 1449+1451-1452+1456-1458,PCE 1456 HAS FRESH
GLASS;
Comments : CONTINUATION OF UNIT 17,LIGHT GRAY BASALT;
Phenocrysts: OLIVINE
COMPLETELY ALTERED MICROPHENOS(TO SMEC);
Replacement: SMECTITE
Minerals Replaced: OL
OL MICROPHENOS ALTERED TO DARK GREEN OR YELLOW-RED
IN OXIDATION ZONES;
Leg : 69 Top/Bottom Interval(mm): 0/1250 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 467.25
Core: 27 Top of Core Depth (m) : 466.00
Sect: 1 Top of Section Depth(m): 466.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1459 (2-6), 1460 (8-14), 1461 (17-23),
1462 (26-30), 1463 (33-37), 1464 (41-46),
1465 (50-53), 1466 (57-63), 1467 (66-74),
1468 (71-76), 1469 (76-79), 1470 (82-87),
1471 (90-95), 1472 (98-103), 1473 (105-110),
1474 (114-121), 1475 (117-121);
Texture : APHYRIC,FRESH GLASSY MARGIN PCES 1460+1461,PCES
1466-1475 COARSE-GRAINED,PCE 1459 SPHERUL TEXTURE;
Alteration : MOD
PCES 1461+1464-1465+1467-1475,OL ALTERED TO
CLAY.MINS;
FRESH
PCES 1459-1460+1462-1463+1466,GLASSY MARGIN ON
PCES 1460+1461 FRESH,FRESH OL IN NON-OXIDIZED
ZONES;
Comments : PCE 1475 ENDS UNIT 17;
Phenocrysts: OLIVINE
MICROPHENOS ALTERED TO DARK GREEN & RED CLAY.MINS,
FRESH OL IN NON-OXIDIZED ZONES;
Replacement: CLAY
Minerals Replaced: OL
DARK GREEN OR RED;
Leg : 69 Top/Bottom Interval(mm): 1250/1500 Analyst: Noack, Y.
Hole: 504B Sample Midpoint (m) : 467.50
Core: 27 Top of Core Depth (m) : 466.00
Sect: 1 Top of Section Depth(m): 467.25
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1476 (125-135), 1477 (139-147);
Texture : MOD PHYRIC;
Alteration : MOD
YELLOW & RED OXIDATION ZONE,ALTERED OL;
Comments : PCE 1477 BRECCIA,PCE 1477 BEGINS UNIT 18;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): 3
OLIVINE ( 3%)
Size(mm): 2
OL ALTERED TO CLAY.MINS & CARB.UNSPEC;
Replacement: CLAY
Minerals Replaced: OL
DARK GREEN &/OR RED;
CARBONATE
Minerals Replaced: OL
UNSPEC;
Leg : 69 Top/Bottom Interval(mm): 0/ 800 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 468.30
Core: 27 Top of Core Depth (m) : 466.00
Sect: 2 Top of Section Depth(m): 467.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1478 (3-14), 1483 (48-51), 1484 (54-58),
1485 (62-69), 1486 (72-79);
Texture : MOD PHYRIC,FINE-GRAINED;
Alteration : MOD
PCE 1478+1483-1484,OL REPLACED BY CLAY.MINS &
CARB.UNSPEC,OXIDATION IN PCE 1478;
Comments : CONTINUATION OF UNIT 18;
Vesicles : FEW VESICLES;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): 1-5
OLIVINE ( 3%)
Size(mm): 1-3
COMBINATION
Size(mm): 2
CLUMPS OF PLAG & PYX VISIBLE,OL ALTERED TO
CLAY.MINS & CARB.UNSPEC;
Replacement: CLAY
Minerals Replaced: OL
OL REPLACED BY GREEN OR RED CLAY.MINS IN
OXIDATION ZONE;
CARBONATE
Minerals Replaced: OL
LARGE XTLLINE CARB.UNSPEC ON PCE 1486;
Leg : 69 Top/Bottom Interval(mm): 0/ 800 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 468.30
Core: 27 Top of Core Depth (m) : 466.00
Sect: 2 Top of Section Depth(m): 467.50
LITHOLOGY: PLAG-OL-CPX SPARSELY MICROPHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1479 (17-22), 1480 (25-29), 1481 (32-35),
1482 (38-45);
Texture : SPARSELY MICROPHYRIC;
Structure : PILLOW BASALT,STRONGLY VEINED BY GREEN SMEC,OFFSET
VEINS IN PCE 1481;
Alteration : FRESH
Comments : CONTINUATION OF UNIT 18;
Vesicles : FEW VESICLES;
Phenocrysts: PLAGIOCLASE
Size(mm): 1-2
OLIVINE
Size(mm): <1
FRESH OR PSEUDOMORPHED;
CLINOPYROXENE
Size(mm): 2-3
ALL MICROPHENOS TOTAL 1-2%,PCE 1481 HAS 2% MICRO-
PHENOS;
Replacement: SMECTITE
GREEN;
UNIDENTIFIED
Minerals Replaced: OL
UNIDENT PSEUDOMORPHS;
Leg : 69 Top/Bottom Interval(mm): 0/ 380 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 475.38
Core: 28 Top of Core Depth (m) : 475.00
Sect: 1 Top of Section Depth(m): 475.00
LITHOLOGY: PLAG-OL SPARSELY MICROPHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1487 (3-13), 1488 (13-21), 1489 (24-28),
1490 (31-36);
Texture : SPARSELY MICROPHYRIC,CONTINUATION OF BOTTOM OF CORE
27-2,PCE 1490 HAS GLASSY RIND;
Structure : PILLOW BASALT;
Alteration : MOD
STRONG OXIDATION,OL ALTERED;
Comments : PCE 1490 MARKS END OF UNIT 18;
Phenocrysts: PLAGIOCLASE
OLIVINE
Replacement: CLAY
Minerals Replaced: OL
RED IN OXIDATION ZONES;
Leg : 69 Top/Bottom Interval(mm): 380/1500 Analyst: Adamson, A.C.
Hole: 504B Sample Midpoint (m) : 476.50
Core: 28 Top of Core Depth (m) : 475.00
Sect: 1 Top of Section Depth(m): 475.38
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1491 (38-50), 1492 (52-58), 1493 (60-68),
1494 (69-78), 1495 (80-91), 1496 (91-100),
1497 (103-107), 1498 (110-119), 1499 (120-126),
1500 (128-138), 1501 (140-148);
Texture : MOD PHYRIC,TEXTURES RANGE FROM NEARLY GLASSY TO
INTERSERTAL MICROLITIC;
Structure : PILLOW BASALT;
Alteration : MOD
PCES 1491 TO TOP OF 1494+1498+1500,OXIDATION ZONES
ARE MUCH LESS DEVELOPED EXCEPT FOR PCES 1491-1492+
1500-1501;
Comments : PCE 1491 BEGINS UNIT 19;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): TO 3
OLIVINE ( 3%)
Size(mm): TO 3
CLINOPYROXENE ( 1%)
Size(mm): TO 2
Replacement: UNIDENTIFIED
UNIDENT.MINS IN OXIDATION ZONES;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 478.00
Core: 28 Top of Core Depth (m) : 475.00
Sect: 2 Top of Section Depth(m): 476.50
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1502 (2-8), 1503 (8-16), 1504 (15-24),
1505 (24-32), 1506 (32-39), 1507 (42-47),
1508 (51-59), 1509 (60-68), 1511 (76-78);
Texture : MOD PHYRIC,CONTINUED FROM LOWER PORTION OF CORE
28-1;
Structure : PILLOW BASALT;
Alteration : MOD
MORE OXIDIZED THAN IN CORE 28-1,PCES 1507-1508+
1511 ARE STRONGLY OXIDIZED;
Comments : CONTINUATION OF UNIT 19,PCE 1511 APPEARS TO BE OUT
OF SEQUENCE,PCES 1507-1508+1511 ARE BRECCIATED;
Phenocrysts: PLAGIOCLASE
OLIVINE
CLINOPYROXENE
Replacement: UNIDENTIFIED
UNIDENT.MINS IN OXIDIZED ZONES;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 478.00
Core: 28 Top of Core Depth (m) : 475.00
Sect: 2 Top of Section Depth(m): 476.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1510 (71-74), 1512 (82-85), 1513 (89-98),
1514 (103-107), 1515 (111-115), 1516 (118-121),
1517 (124-132), 1518 (135-137), 1520 (144-147);
Texture : PHYRIC;
Structure : PILLOW BASALT,GREEN SMEC FILLS CRACKS,PCE 1515
CENTRAL PART OF CRACK IS FILLED WITH CALCITE;
Alteration : MOD
OL ALTERED;
Comments : CONTINUATION OF UNIT 19,PCE 1519 IS NOT ILLUSTRATED
& IS PRESUMED NOT TO EXIST;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): TO 4
OLIVINE ( 3%)
Size(mm): TO 3
CLINOPYROXENE ( 2%)
Size(mm): TO 3
OL ALTERED TO GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN;
SMECTITE
GREEN,FOUND IN CRACKS;
CALCITE
CENTRAL PART OF CRACK IN PCE 1515;
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 479.50
Core: 28 Top of Core Depth (m) : 475.00
Sect: 3 Top of Section Depth(m): 478.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1521 (3-10), 1522 (12-19), 1523 (21-28),
1524 (28-34), 1525 (35-42), 1526 (43-49),
1527 (50-53), 1528 (53-61), 1529 (61-69),
1530 (69-75), 1531 (75-80), 1532 (82-87),
1533 (90-98), 1534 (101-107), 1535 (111-117),
1536 (120-128), 1537 (128-136), 1538 (136-141),
1539 (142-148);
Texture : PHYRIC,MOSTLY VARIOLITIC;
Structure : PILLOW BASALT,CRACKS FILLED WITH GREEN SMEC;
Alteration : FRESH
OL ALTERED;
Comments : CONTINUATION OF UNIT 19;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): TO 3
OLIVINE ( 3%)
Size(mm): TO 3
CLINOPYROXENE ( 3%)
Size(mm): TO 3
OL ALTERED TO GREEN OR RED SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN OR RED;
SMECTITE
GREEN,FOUND IN CRACKS;
Leg : 69 Top/Bottom Interval(mm): 0/ 500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 480.00
Core: 28 Top of Core Depth (m) : 475.00
Sect: 4 Top of Section Depth(m): 479.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1540 (3-10), 1541 (13-21), 1542 (24-30),
1543 (32-39), 1544 (42-48);
Texture : PHYRIC,SIMILAR TO CORE 28-3;
Structure : PILLOW BASALT;
Alteration : FRESH
Comments : CONTINUATION OF UNIT 19;
Phenocrysts: PLAGIOCLASE
OLIVINE
CLINOPYROXENE
Leg : 69 Top/Bottom Interval(mm): 500/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 481.00
Core: 28 Top of Core Depth (m) : 475.00
Sect: 4 Top of Section Depth(m): 480.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 1545 (52-56), 1546 (58-66), 1547 (69-75),
1548 (68-81), 1549 (84-90), 1550 (92-98),
1551 (102-108), 1552 (111-117), 1553 (120-131),
1554 (134-137), 1555 (137-142), 1556 (144-146);
Texture : PHYRIC,HOLOXTLLINE OPHITIC;
Structure : MASSIVE BASALT;
Alteration : MOD
OL COMPLETELY ALTERED,RED OXIDATION ZONES;
Comments : CONTINUATION OF UNIT 19,PCE 1546 BRECCIATED;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): TO 6
CLINOPYROXENE ( 4%)
Size(mm): TO 4
OLIVINE ( 3%)
Size(mm): TO 3
OL COMPLETELY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
UNIDENTIFIED
RED OXIDATION ZONES;
Leg : 69 Top/Bottom Interval(mm): 0/ 250 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 481.25
Core: 28 Top of Core Depth (m) : 475.00
Sect: 5 Top of Section Depth(m): 481.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCES 1557 (2-8), 1558 (12-23);
Texture : PHYRIC,SIMILAR TO BOTTOM OF CORE 28-4;
Structure : MASSIVE BASALT;
Alteration : MOD
Comments : PCE 1558 MARKS END OF UNIT 19;
Phenocrysts: PLAGIOCLASE
CLINOPYROXENE
OLIVINE
Leg : 69 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 485.50
Core: 29 Top of Core Depth (m) : 484.00
Sect: 1 Top of Section Depth(m): 484.00
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1559 (2-8), 1560 (10-17), 1561 (19-26),
1562 (28-35), 1563 (38-44), 1564 (48-53),
1565 (55-61), 1566 (63-66), 1567 (68-73),
1568 (74-76), 1569 (74-77), 1570 (76-80),
1571 (82-85), 1572 (87-90), 1573 (95-100),
1574 (103-106), 1575 (109-113), 1576 (116-119),
1577 (122-126), 1578 (128-133), 1579 (137-146);
Texture : APHYRIC,FINE-GRAINED HOLOXTLLINE;
Structure : PILLOW BASALT;
Alteration : FRESH
OL COMPLETELY ALTERED,PCE 1559 OXIDIZED;
Comments : PCE 1559 BEGINS UNIT 20,PCES 1560-1561 BRECCIA WITH
APHYRIC FRAGMENTS & GREEN SMEC CEMENT;
Groundmass : OLIVINE ( <1%)
Size(mm): 0.3
EUHEDRAL XTLS,COMPLETELY ALTERED TO GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN;
SMECTITE
GREEN,CEMENTS BRECCIATED PCES;
Leg : 69 Top/Bottom Interval(mm): 0/ 200 Analyst: Pertsev, N.
Hole: 504B Sample Midpoint (m) : 485.70
Core: 29 Top of Core Depth (m) : 484.00
Sect: 2 Top of Section Depth(m): 485.50
LITHOLOGY: APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1580 (2-6), 1581 (10-17);
Texture : APHYRIC,FINE-GRAINED HOLOXTLLINE;
Structure : PILLOW BASALT;
Alteration : FRESH
Comments : PCE 1581 ENDS UNIT 20;
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