Leg : 67 Top/Bottom Interval(mm): 0/ 550 Analyst: Cowan, D.S. Hole: 500 Sample Midpoint (m) : 157.05 Core: 18 Top of Core Depth (m) : 156.50 Sect: 1 Top of Section Depth(m): 156.50 LITHOLOGY: OL-PLAG MICROPHYRIC TO APHYRIC BASALT; Piece No. : PCES 1 (0-2), 2 (7-14), 3 (16-18), 4 (24-28), 5 (31-36), 6 (39-44), 7 (46-54); Texture : VERY FINE GRAINED, MICROPHYRIC TO APHYRIC, PCES 6 & 7 ARE VERY FINE GRAINED BUT APHYRIC, PCE 5 HAS A 2CM GLASSY RIM(5MM THICK), PCES 1 & 2 & 7 HAVE SMALL (1CM OR LESS) ATTACHED SELVAGES OF SOFT BLUISH WHITE NANNOFOSSIL CHALK; Alteration : FRESH SOME OL PHENOS PROBABLY ALTERED TO CLAY MINERALS (GREENISH), PCES(1, 2, 4) HAVE CONCENTRIC WEATHERING RINDS; Comments : DARK GREY TO BLACK, PCES(1, 2, 4) HAVE TAN OUTER LAYERS; Phenocrysts: PLAGIOCLASE ( TO 1%) Size(mm): 2-3 OLIVINE ( TO 1%) Size(mm): TO 1 Groundmass : PLAGIOCLASE MICROLITES; Replacement: CLAY PHENOS IN PCES 1-5 IN SOME CASES ALTERED TO GREENISH CLAY; Leg : 67 Top/Bottom Interval(mm): 0/ 160 Analyst: Cowan, D.S. Hole: 500 Sample Midpoint (m) : 158.66 Core: 19 Top of Core Depth (m) : 158.50 Sect: 1 Top of Section Depth(m): 158.50 LITHOLOGY: PLAG-OL MOD PHYRIC BASALT; Piece No. : PCES 1 (2-9), 2 (11-16); Texture : PHYRIC; Structure : CAVITIES ON OUTER SURFACE OF PCE LOCALLY COATED WITH DRUSES OF SOFT GREEN TO YELLOW-GREEN CLAY; Alteration : EXT OL ALTERED TO ORANGE BROWN CLAY TO IRON OXIDES; Comments : TAN TO BROWN; Phenocrysts: PLAGIOCLASE ( 7%) Size(mm): TO 4 OLIVINE ( 2%) Size(mm): 2 OL PHENOS ALTERED TO ORANGE BROWN CLAY TO IRON OXIDES, ID UNCERTAIN FOR OL; Replacement: CLAY SOFT GREEN TO YELLOW GREEN; Leg : 67 Top/Bottom Interval(mm): 180/ 660 Analyst: Cowan, D.S. Hole: 500 Sample Midpoint (m) : 159.16 Core: 19 Top of Core Depth (m) : 158.50 Sect: 1 Top of Section Depth(m): 158.68 LITHOLOGY: PLAG-OL MOD PHYRIC BASALT; Piece No. : PCES 3 (18-27), 4 (30-45), 5 (47-55), 6 (61-66); Texture : PHYRIC; Alteration : FRESH TAN WEATHERING RIND ON PCES(4, 5, 6), MICROPHENOS OF OL(?) ALTERED TO ORANGE BROWN CLAY OR GREEN SOFT CLAY, TAN WEATHERED ZONE 1CM THICK ADJACENT TO CHALK; Comments : DARK GREY TO BLACK, ATTACHED TO PCE 4 IS SELVAGE OF HARD(BAKED?) CREAMY WHITE CHALK, RELICT FORAM TESTS VISIBLE WITH HAND LENS, CHALK ALSO CONTAINS SUBROUNDED TO ANGULAR FRAGMENTS OF TAN BASALT AND DARK GREEN SOFT CLAY CONTAINING PLAG MICROLITES (PROBABLY WAS GLASSY); Vesicles : Size(mm): 5 Percent: Location: Filling: CLAY PCE 4 CONTAINS VESICLES FILLED WITH GREEN CLAY; Phenocrysts: PLAGIOCLASE ( 3%) Size(mm): 2 OLIVINE ( 2%) ID UNCERTAIN FOR MICROPHENOS SINCE ALTERED TO ORANGE BROWN CLAY OR SOFT GREEN CLAY; Groundmass : FELDSPAR MATRIX WITH FELDSPAR MATRIX; Replacement: CLAY Leg : 67 Top/Bottom Interval(mm): 690/ 750 Analyst: Cowan, D.S. Hole: 500 Sample Midpoint (m) : 159.25 Core: 19 Top of Core Depth (m) : 158.50 Sect: 1 Top of Section Depth(m): 159.19 LITHOLOGY: APHYRIC BASALT; Piece No. : PCE 7 (69-75); Texture : APHYRIC; Structure : CAVITIES PARTLY LINED WITH DRUSES OF CALCITE AND PALE GREEN CLAY; Alteration : MOD LIGHT GREY WEATHERING RIND; Comments : DARK GREY; Vesicles : VESICLES PARTLY LINED WITH DRUSES OF CALCITE AND PALE GREEN CLAY; Replacement: CLAY CALCITE |
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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