Core data from the Ocean Drilling Program legs 101-129

                ODP hard-rock thin section description - verbose form
   leg :  103                section:  CC       unit/subunit :
   hole: 639E                top int: 002 cm    observer code:  GIR
   core: 003R                 pieces: 999

       rock name: Altered volcanic, volcaniclastic?
         texture: Porphyritic


     grain size: 0.2-1.5 mm 

                        ***** PHENOCRYSTS *****





                        ***** GROUNDMASS *****
Groundmass completely altered. 
N/A                    present %  N/A    original %  N/A     size N/A
                         ****** VESICLES *****
Type: Vesicles   %: 0

                ****** SECONDARY MINERALIZATION ******
mineral name:                            percent:  
      replacement: 
      comments   : 
                     ****** OVERALL COMMENTS ******
Quartz, albite (An20-30), muscovite, altered mafics (amph?) make up 15% of 
Primary Mineralogy.  Possible dacite, andesite composition, less silicic than 
639F rocks, possibly volcaniclastic.  Phenocrysts are euhedral to rounded.  
Groundmass completely altered.  Large, irregular completely altered patches.  No 
piece number was given, 999 is a dummy value. 

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These Web pages are from the Core Data from the Ocean Drilling Program Legs 101-129 CD-ROM produced in 2001 by the U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Environmental Satellite, Data, and Information Service, National Geophysical Data Center, and collocated World Data Center for Marine Geology and Geophysics, Boulder. Data were compiled in cooperation with the U.S. Science Support Program, the Joint Oceanographic Institutions, Inc., and the U.S. National Science Foundation. Please see the NGDC privacy, disclaimer, and copyright notices. Additional ocean drilling data are available from NGDC and from the ODP/IODP.

questions to: carla.j.moore@noaa.gov