Core Data from the Deep Sea Drilling Project

Leg : 16    Top/Bottom Interval(mm):     /      Describer: Yeats, R.S.
Hole: 161A  Top of Core Depth(m)   :   244.00   Rock Type: IGNEOUS
Core:  15   Sample Midpoint(m)     :   244.10   Sect/Pc #: CC/

ROCK = PLAG-OL-CPX MICROPHYRIC BASALT
       SOURCE ISIR, SEE ALSO P. 305, ALTERED;
       Texture: FINE-GRAINED,GLASSY,MICROPHYRIC*

Phenocrysts- PLAGIOCLASE
             Size(mm):  0.05-1.25  Morphology: LATHS
             APPROX COMP AN68,RARE OSCILLATORY ZONING OR NORMAL
             ZONING (CALCIC LABRADORITE),ALSO AS MODERATELY
             ALIGNED THIN LABRADORITE LATHS 100-700 MICRONS
             LONG;

             AUGITE
             Size(mm):  0.05-0.25  Morphology: ANHEDRAL GRAINS,VARIOLITIC

             Morphology: SHEAFS
             2VZ NEAR 60 DEGREES OCCURRING AS VARIOLITIC
             SHEAFS OR AS ANHEDRAL GRAINS TO 200 MICRONS ACROSS
             ASSOCIATED WITH LABRADORITE IN PHENOCRYST
             CLUSTERS,Z-C =40,Z-X=0.015;

             OLIVINE
             Size(mm):   0.1-0.75  Morphology: EUHEDRAL
             NEARLY COMPLETELY ALTERED*

Groundmass - GROUNDMASS
             Morphology: VARIOLITIC
             INCLUDES PYX+MAGN+CHLOROPHAEITE,DEVITRIFIED;

             OPAQUE MINERALS
             SHORT OCTAHEDRAL CHAINS,INDIVIDUAL OCTAHEDRA*

Alteration - IDDINGSITE
             Replacing: OL

             SERPENTINITE
             Replacing: OL

Vesicles   -
             Size(mm):  0.1-0.3
             Filling: FINE-GRAINED,

             Filling: GLASSY BASALT,

             Filling: SERP,IDDINGS

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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