Core Data from the Deep Sea Drilling Project

Leg :  7    Top/Bottom Interval(mm):    0/   0  Describer: Heath, R.
Hole:  61A  Top of Core Depth(m)   :    89.00   Rock Type: TUFF
Core: B 1   Sample Midpoint(m)     :    89.00   Sect/Pc #:   /

ROCK = SILTY TUFF
       FROM DRILL STRING BUMPER SUB;
       Where sampled: TYPICAL OF MATERIAL CORED BELOW 72 METERS*

Groundmass - PLAGIOCLASE
             MEAN GRAIN SIZE .05-.1MM FOR ALL CONSTITUENTS,ALL
             CONSTITUENTS ALSO ABUNDANT;

             PYROXENE
             PALE BROWN,NON-PLEOCHROIC;

             OPAQUE MINERALS
             INCLUDES MAGNETITE+ILMENITE(LARGELY ALTERED TO
             RED-BROWN SECONDARY OXIDES);

             GLASS
             YELLOWISH BROWN,RATHER FRESH LOOKING,MATRIX IS
             CLAY,SOME FRAGMENTS CONTAIN MODERATELY TO WELL
             PRESERVED LATE CRETACEOUS RADIOLARIANS*

Alteration - CHLORITE
             RARE,POSSIBLY PLUCKED DURING SECTION MAKING;

             CLAY MINERALS
             Location: MATRIX
             WHITE,EXTREMELY FINE GRAINED CLAY(PROBABLY
             MONTMORILLONITE-SWELLS IN WATER)WHICH MAY BE
             SOMEWHAT ZEOLITIC*

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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