Leg : 67 Top/Bottom Interval(mm): 1150/1500 Analyst: Cowan, D.S. Hole: 495 Sample Midpoint (m) : 429.00 Core: 46 Top of Core Depth (m) : 427.50 Sect: 1 Top of Section Depth(m): 428.65 LITHOLOGY: OL-PLAG MICROPHYRIC BASALT; Piece No. : PCES 1 (117-123), 2 (125-130), 3 (133-135), 4 (137-144), 5 (146-150); Texture : MICROPHYRIC, GROUNDMASS IS CRYSTALLINE AND MICROLITIC; Structure : PCE 1 CONTAINS CAVITIES COMPLETELY FILLED WITH CRYSTALLINE WHITE CALCITE; Alteration : SLIGHTLY; Comments : DARK GREY, THE ACTUAL CONTACT OF BASALT AND FORAMINIFERAL NANNOFOSSIL CHALK IS NOT PRESERVED, BUT LOWEST CHALK CONTAINS ABUNDANT WELL-PRESERVED FORAMS; Phenocrysts: OLIVINE ( <7%) Size(mm): <1 OL ALTERED TO ORANGE-BROWN MATERIAL, LOCALLY CLUSTERED (D; %) PLAGIOCLASE ( <4%) Size(mm): 2 PLAG PHENOS AVERAGE 2MM. LONG; Replacement: CALCITE Leg : 67 Top/Bottom Interval(mm): 0/1050 Analyst: Cowan, D.S. Hole: 495 Sample Midpoint (m) : 429.55 Core: 47 Top of Core Depth (m) : 428.50 Sect: 1 Top of Section Depth(m): 428.50 LITHOLOGY: OL-PLAG MODERATELY PHYRIC BASALT; Piece No. : PCES 1A (0-15), 1B (25-20), 2A (22-27), 2B (27-31), 3 (33-39), 4A (44-50), 4B (50-58), 4C (57-63), 5 (72-75), 6A (82-85), 6B (85-95), 6C (95-105); Texture : GENERALLY PHYRIC, GROUNDMASS IS MICROLITIC AND CRYSTALLINE TO APHANITIC, PCE 3A TOP HAS 1 CM ALTERED GLASS RIM, PCE IN 5 IS ALSO PARTLY GLASS; Structure : PCE 4A HAS WHITE CRYSTALLINE VEIN(<1MM) SURROUNDED BY TAN ALTERED GROUNDMASS SAME FOR SOME PCES IN 5; Alteration : FRESH PCES 1A-3, PCE 3 HAS ALTERED GLASSY RIM ON TOP; MOD PCES 4A-6C MOD ALTERED, PCE 4A SURROUNDED BY TAN ALTERED GROUNDMASS AS WELL AS SOME PCES IN 5, OL PARTLY ALTERED TO ORANGE-BROWN CLAY(?), PCES 2A & 2B OX STAINS; Comments : DARK GREY TO TAN BASALT, PCES 2A & 2B ARE CREAMY WHITE AND FIRM(BAKED CHALK?) WITH BLACK DENDRITIC OX STAINS & ANGULAR 2-5MM FRAGMENTS OF GREENISH YELLOW WAXY MATERIAL; Phenocrysts: OLIVINE ( 5%) Size(mm): <2 PARTLY ALTERED TO ORANGE-BROWN CLAY(?); PLAGIOCLASE ( 3%) Size(mm): TO 4 PRESENT AS LATHS; Replacement: CLAY Minerals Replaced: OL ORANGE-BROWN, ID CLAY UNCERTAIN; CLAY Minerals Replaced: GLASS ORANGE-BROWN; Leg : 67 Top/Bottom Interval(mm): 0/1500 Analyst: Cowan, D.S. Hole: 495 Sample Midpoint (m) : 438.00 Core: 48 Top of Core Depth (m) : 436.50 Sect: 1 Top of Section Depth(m): 436.50 LITHOLOGY: OL-PLAG MODERATELY PHYRIC BASALT; Piece No. : PCES 1 (0-5), 2 (10-21), 3 (25-30), 4 (32-35), 5A (38-46), 5B (49-51), 5C (51-60), 6 (65-67), 7 (70-75), 8 (79-87), 9 (90-97), 10 (100-106), 11 (107-123), 12 (124-130), 13 (133-138), 14 (141-150); Texture : PHYRIC, PCES 4 & 6 & 10 HAVE GLASSY BROWN-BLACK RIM (TO 1CM); Structure : PCES 12 & 8 ALTERATION RELATED TO 1-2MM WHITE CRYSTALLINE VEINS, ALTERNATING GLASSY AND FRESH PCES SUGGEST PILLOW LAVA; Alteration : MOD-FRESH 25-50CM & 60-89CM & 100-150CM, LOCALLY SMALLER PCES(6) ARE ALTERED THROUGHOUT AND REDDISH-BROWN IN COLOR, PCES 4 & 6 & 10 HAVE GLASSY BROWN-BLACK RIMS LOCALLY ALTERED TO ORANGE BROWN CLAY, PCES 12 & 8 ALTERATION AS IN 6 RELATED TO CRYSTALLINE VEINS; Comments : DARK GREY; Vesicles : Size(mm): 1-3 Percent: Location: Filling: CLAY PCE 11 GREEN WAXY CLAY; Phenocrysts: OLIVINE ( 5%) Size(mm): <2 LOCALLY REPLACED BY ORANGE-BROWN ALTERATION MATERIALS; PLAGIOCLASE ( 2%) Size(mm): TO 3 Replacement: CLAY Leg : 67 Top/Bottom Interval(mm): 0/1400 Analyst: Cowan, D.S. Hole: 495 Sample Midpoint (m) : 439.40 Core: 48 Top of Core Depth (m) : 436.50 Sect: 2 Top of Section Depth(m): 438.00 LITHOLOGY: OL-PLAG MOD PHYRIC BASALT; Piece No. : PCES 1 (0-2), 2 (7-14), 3 (16-25), 4 (27-35), 5 (37-39), 6 (41-49), 7 (50-58), 8 (60-66), 9A (68-78), 9B(79-87), 10 (90-96), 11 (98-110), 12 (111-126), 13A (129-136), 13B (136-140); Texture : PHYRIC, MICROLITIC, PCES 5 & 6 & 8 HAVE GLASSY RIMS; Structure : PCE 6 HAS 2CM PATCH OF DRUSY CALCITE COATING INDENTATION IN GLASSY RIM, PCE 7 CONTAINS 1-2MM WHITE VEINS WITH ADJACENT RED BROWN ALTERED ZONES; Alteration : MOD PCES 1-8 ALTERED TO PALE BROWN TO RED BROWN, OL ALTERS TO ORANGE BROWN CLAY APPROACHING GLASS RIM PCES 5 & 6 & 8, PCE 7 CONTAINS VEINS WITH ADJACENT RED BROWN ALTERED ZONES; FRESH PCES 9-13; Phenocrysts: OLIVINE ( <5%) Size(mm): TO 2 PLAGIOCLASE ( <2%) Size(mm): TO 4 Replacement: CALCITE DRUSY CALCITE COATING INDENTATION IN GLASSY RIM OF PCE 6; Leg : 67 Top/Bottom Interval(mm): 0/1100 Analyst: Cowan, D.S. Hole: 495 Sample Midpoint (m) : 440.60 Core: 48 Top of Core Depth (m) : 436.50 Sect: 3 Top of Section Depth(m): 439.50 LITHOLOGY: OL-PLAG MOD PHYRIC BASALT; Piece No. : PCES 1A (0-15), 1B (15-26), 2A (31-40), 2B (41-46), 2C (46-65), 3 (67-74), 4A (81-100), 4B (101-109), Texture : PHYRIC, PCES 2-4 HAVE GLASSY RIMS, MICROLITIC GROUNDMASS; Structure : PCE 2C HAS VEIN, PCE 1A HAS PATCHES FILLED WITH DRUSY CALCITE, PCES 1A & 2-4 PROBABLY ALL PILLOW BASALTS; Alteration : MOD TO FRESH 46-86CM MOD, OL PHENOS LOCALLY ALTERED TO RED BROWN CLAY, BASALT LOCALLY ALTERED TO REDDISH BROWN, ALTERED IN VICINITY OF VEIN IN 2C; Comments : DARK GREY WHERE FRESH; Vesicles : Size(mm): 3 Percent: Location: Filling: CALCITE PCE 1A DRUSY CALCITE; Phenocrysts: OLIVINE ( <5%) Size(mm): <2 PLAGIOCLASE ( 2%) Size(mm): 2 MICROPHENOS; Replacement: CALCITE Leg : 67 Top/Bottom Interval(mm): 0/1300 Analyst: Cowan, D.S. Hole: 495 Sample Midpoint (m) : 442.30 Core: 48 Top of Core Depth (m) : 436.50 Sect: 4 Top of Section Depth(m): 441.00 LITHOLOGY: OL-PLAG MOD PHYRIC BASALT; Piece No. : PCES 1A (0-16), 1B (16-24), 1C (15-30), 1D (31-40) 1E (41-48), 1F (50-53), 1G (55-60), 1H (61-76), 1I (75-85), 2 (89-94), 3 (96-104), 4 (106-110), 5A (115-121), 5B (120-122), 6 (124-130); Texture : MOD PHYRIC, PCES 1A-1G HAVE GLASSY SELVAGES-PROBABLY CHILLED RIMS OF PILLOWS; Structure : GLASSY SELVAGES IN PCES 1A-1G ARE PROBABLY CHILLED RIMS OF PILLOWS, SOME FRACTURES IN 1B & C COATED WITH GREENISH CLAY, 1B HAS 2CM CAVITY LINED WITH CALCITE CRYSTALS, 1C HAS A 1X2CM LARGE CAVITY FILLED WITH CREAMY CALCITE; Alteration : MOD PCES 1A-1G ARE ALTERED AND PARTLY REDDISH BROWN, OL ALTERED TO REDDISH BROWN AND GREEN CLAY; FRESH PCES 1H-5 EXTREMELY FRESH; MOD PCE 6; Comments : DARK GREY TO RED BROWN ALTERED BASALT; Phenocrysts: OLIVINE ( 2%) Size(mm): <1 PLAGIOCLASE ( 2%) Size(mm): TO 4 Groundmass : MICROLITIC; Replacement: CALCITE LINES CAVITY IN 1B IN FORM OF CALCITE CRYSTALS, FILLS CAVITY IN 1C WITH CREAMY CALCITE; Leg : 67 Top/Bottom Interval(mm): 0/ 200 Analyst: Cowan, D.S. Hole: 495 Sample Midpoint (m) : 446.20 Core: 49 Top of Core Depth (m) : 446.00 Sect: 1 Top of Section Depth(m): 446.00 LITHOLOGY: OL-PLAG MOD PHYRIC BASALT; Piece No. : PCES 1 (0-4), 2 (10-19); Texture : MOD PHYRIC, MEDIUM TO FINE GRAINED, GROUNDMASS LOCALLY VARIOLITIC; Structure : FRACTURES LOCALLY COATED WITH OLIVINE GREEN CLAY; Alteration : FRESH; Phenocrysts: OLIVINE ( 5%) Size(mm): TO 2 PLAGIOCLASE ( 1%) Size(mm): TO 2 PLAG PRESENT AS LATHS; |
Cite as: Deep Sea Drilling Project (1989): Archive of Core and Site/Hole Data and Photographs from the Deep Sea Drilling Project (DSDP). National Geophysical Data Center, NOAA. doi:10.7289/V54M92G2 [access date]
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