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Core Data from the Deep Sea Drilling Project


Leg : 18    Top/Bottom Interval(mm):  100/   0  Describer: MacLeod, N.S.
Hole: 177A  Top of Core Depth(m)   :   378.50   Rock Type: IGNEOUS
Core:  24   Sample Midpoint(m)     :   378.60   Sect/Pc #:  1/

ROCK = BASALT
       SOURCE IS IR*

Groundmass - PLAGIOCLASE               (   40%)

             OLIVINE                   (   10%)
             ENTIRELY REPLACED BY CLAY MINERALS,PROPORTION
             SHOWN IS APPROXIMATE;

             SPINEL                    (  .25%)

             PYROXENE                  (   35%)

             MATRIX                    ( 14.5%)
             SAME AS 177A-25-116,PERCENTAGES OBTAINED BY MODAL
             ANALYSES*

Vesicles   -
             Percent:   .25
             AMYGDULES*




Leg : 18    Top/Bottom Interval(mm): 1140/   0  Describer: MacLeod, N.S.
Hole: 177A  Top of Core Depth(m)   :   378.50   Rock Type: IGNEOUS
Core:  24   Sample Midpoint(m)     :   381.14   Sect/Pc #:  2/

ROCK = BASALT
       SOURCE IS IR,UNCERTAIN ABOUT SECTION NUMBER*

Groundmass - PLAGIOCLASE               ( 46.5%)

             OLIVINE                   (  8.5%)
             ENTIRELY REPLACED BY CLAY MINERALS,PROPORTION
             SHOWN IS APPROXIMATE;

             SPINEL                    (  .25%)

             PYROXENE                  ( 29.5%)

             MATRIX                    (15.25%)
             SAME AS 177A-25-116,PERCENTAGES OBTAINED BY MODAL
             ANALYSES*




Leg : 18    Top/Bottom Interval(mm): 1400/   0  Describer: MacLeod, N.S.
Hole: 177A  Top of Core Depth(m)   :   378.50   Rock Type: IGNEOUS
Core:  24   Sample Midpoint(m)     :   381.40   Sect/Pc #:  2/

ROCK = BASALT
       SOURCE IS IR,UNCERTAIN ABOUT SECTION NUMBER*

Groundmass - PLAGIOCLASE               (   43%)

             OLIVINE                   (    8%)
             ENTIRELY REPLACED BY CLAY MINERALS,PROPORTION
             SHOWN IS APPROXIMATE,PERCENTAGES OBTAINED BY MODAL
             ANALYSES*

Vesicles   -
             Percent:   .25
             AMYGDULES*




Leg : 18    Top/Bottom Interval(mm): 1160/   0  Describer: MacLeod, N.S.
Hole: 177A  Top of Core Depth(m)   :   381.50   Rock Type: IGNEOUS
Core:  25   Sample Midpoint(m)     :   384.16   Sect/Pc #:  2/

ROCK = DIABASE
       SOURCE IS IR*

Groundmass - PLAGIOCLASE               ( 19.5%)

             OLIVINE                   (  7.5%)
             ENTIRELY REPLACED BY CLAY MINERALS,PROPORTION
             SHOWN IS APPROXIMATE;

             SPINEL                    (  .25%)

             MATRIX                    (   72%)
             VERY FINE GRAINED OPAQUE MINERALS,PYROXENE AND
             CLAY MINERALS(AFTER GLASS?),PERCENTAGES OBTAINED
             BY MODAL ANALYSES*

Vesicles   -
             Percent:   .25
             AMYGDULES*




    

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.

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