Core Data from the Deep Sea Drilling Project

Leg : 32    Top/Bottom Interval(mm):  660/ 680  Describer: Marshall, M.
Hole: 303A  Top of Core Depth(m)   :   284.80   Rock Type: IGNEOUS
Core:   9   Sample Midpoint(m)     :   285.47   Sect/Pc #:  1/PCE 10 AN

ROCK = BASALT
       11*

Groundmass - PLAGIOCLASE               (   54%)

             PYROXENE                  (   34%)

             OPAQUE MINERALS           (    7%)

Alteration - CLAY MINERALS




Leg : 32    Top/Bottom Interval(mm): 1200/   0  Describer: Marshall, M.
Hole: 303A  Top of Core Depth(m)   :   288.00   Rock Type: IGNEOUS
Core:  10   Sample Midpoint(m)     :   289.20   Sect/Pc #:  1/

ROCK = BASALT
       SOURCE IS IR;
       Texture: INTERSERTAL*

Groundmass - PLAGIOCLASE
             Morphology: LATHS

             OPAQUE MINERALS
             ABUNDANT;

             PYROXENE
             MUCH OF PYX AND GROUNDMASS ALTERED TO GREEN
             MONTMORILLONITE*

Alteration - MONTMORILLONITE
             Replacing: PYX




Leg : 32    Top/Bottom Interval(mm): 1201/   0  Describer: Marshall, M.
Hole: 303A  Top of Core Depth(m)   :   288.00   Rock Type: IGNEOUS
Core:  10   Sample Midpoint(m)     :   289.20   Sect/Pc #:  1/

ROCK = BASALT
       SAME AS 32-303A-10-1-120 EXCEPT ALTERATION DARKER
       GREEN,PYX IS POSSIBLY MORE HIGHLY ALTERED,
       SOURCE IS IR*




Leg : 32    Top/Bottom Interval(mm): 1360/   0  Describer: Marshall, M.
Hole: 303A  Top of Core Depth(m)   :   288.00   Rock Type: IGNEOUS
Core:  10   Sample Midpoint(m)     :   289.36   Sect/Pc #:  1/PCE 13

ROCK = BASALT
       SIMILAR TO CORE 9 BUT FINER GRAINED;

Groundmass - GLASS
             PATCHES OF LIGHT BROWN GLASS(?),AREAS OF THIN
             SECTION APPARENTLY DEVOID OF ALTERATION;

             ILMENITE
             Morphology: NEEDLES
             ABUNDANT;

             PYROXENE
             PYX,AND PLAG,ARE REMARKABLY FRESH*

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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