Core Data from the Deep Sea Drilling Project

Leg : 64    Top/Bottom Interval(mm):    0/ 500  Analyst: Saunders, A.
Hole: 475B  Sample Midpoint (m)    :    76.50
Core:   2   Top of Core Depth (m)  :    76.00
Sect:  1    Top of Section Depth(m):    76.00

LITHOLOGY: OL MOD PHYRIC BASALT;

  Piece No.  : PCES 1 (2-8), 2 (10-18), 3 (19-26), 4 (27-30),
               5 (31-39), 6 (40-46), 7 (48-50);

  Texture    : VERY FINE-GRAINED,GLASSY SELVAGE IN PCES 3+5,MOD
               PHYRIC;

  Structure  : CALCITE-FILLED FRACTURES PCE 2,FACES ON PCES 5+7 ARE
               COVERED WITH GREEN VEIN MATERIAL & ZEOL(?);

  Alteration : FRESH
               MOD
               SLIGHTLY BROWNISH RIMS OCCUR ON PCES 1+3+6 & THIS
               PERIPHERAL NATURE OF ALTERATION SUGGESTS THAT THES
               FRAGMENTS ARE PROBABLY COBBLES LYING EXPOSED TO
               SEDIMENTS AND/OR WATER;

  Comments   : DARK GRAY(N4) BASALT,ROCK HAS HEAVY FEEL;

  Phenocrysts: PLAGIOCLASE               (    3%)
               Size(mm):      TO 2.
               MICROPHENOS NOT EXCEEDING 2MM & GENERALLY <0.5MM;

               OLIVINE
               Size(mm):      TO 2.
               MICROPHENOS NOT EXCEEDING 2MM & GENERALLY <0.5MM,
               FRESH,APPLE-GREEN;

  Replacement: CALCITE

               ZEOLITE
               ID ZEOL UNCERTAIN;

               UNIDENTIFIED
               GREEN VEIN MATERIAL FOUND ON PCES 5+7;


Leg : 64    Top/Bottom Interval(mm):    0/ 210  Analyst: Saunders, A.
Hole: 475B  Sample Midpoint (m)    :    85.71
Core:   3   Top of Core Depth (m)  :    85.50
Sect:  1    Top of Section Depth(m):    85.50

LITHOLOGY: OL MOD PHYRIC BASALT;

  Piece No.  : PCES 1 (1-7), 2 (8-14), 3 (16-21);

  Texture    : VERY FINE-GRAINED,MOD PHYRIC,GLASSY SELVAGES ON
               PCES 1+3,SIMILAR TO CORE 2-1;

  Alteration : SLIGHTLY
               SLIGHT ALTERATION RIMS INDICATE THESE ARE SMALL
               INDIVIDUAL COBBLES;

  Comments   : DARK GRAY(N4) BASALT;

  Phenocrysts: PLAGIOCLASE               (   <3%)
               Size(mm):       <0.5
               MICROPHENOS;

               OLIVINE                   (   <5%)
               Size(mm):       <0.5
               MICROPHENOS,APPLE GREEN;


Leg : 64    Top/Bottom Interval(mm):    0/  50  Analyst: Saunders, A.
Hole: 475B  Sample Midpoint (m)    :    95.05
Core:   4   Top of Core Depth (m)  :    95.00
Sect:  1    Top of Section Depth(m):    95.00

LITHOLOGY: OL MOD PHYRIC BASALT;

  Piece No.  : PCES 1A (0-5), 1B (0-3), 1C (3-4);

  Texture    : VERY FINE-GRAINED,MOD PHYRIC,SIMILAR TO CORES 2-1 &
               3-1;

  Alteration : FRESH

  Comments   : DARK GRAY(N4);

  Phenocrysts: PLAGIOCLASE               (   <3%)
               Size(mm):       <0.5
               MICROPHENOS;

               OLIVINE                   (   <5%)
               Size(mm):       <0.5
               MICROPHENOS,APPLE GREEN;

Introduction

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]

These Web pages are from the Core Data from the Deep Sea Drilling Project Legs 1-96 CD-ROM produced in 1989 and modified in 2000 by the U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Environmental Satellite, Data, and Information Service, National Geophysical Data Center (now part of the National Centers for Environmental Information), and collocated World Data Center for Marine Geology and Geophysics, Boulder (now part of the World Data Service for Geophysics). Data were compiled in cooperation with the U.S. Science Support Program, of the Joint Oceanographic Institutions, Inc. (now the Consortium for Ocean Leadership), and the U.S. National Science Foundation.

Please see NOAA's privacy and disclaimer information. Send questions or comments to mgg.info@noaa.gov.

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