Core data from the Ocean Drilling Program legs 101-129

                ODP hard-rock thin section description - verbose form
   leg :  111                section:  CC       unit/subunit : 0004
   hole: 678B                top int: 051 cm    observer code:  DIV
   core: 004W                 pieces: 055

       rock name: Plagioclase porphyritic basalt
         texture: Quenched, fluidal

   where sampled: Pillow margin(?)

     grain size: Fine 

                        ***** PHENOCRYSTS *****
Plagioclase               present %  5     original % 5       size <1        
           composition: An 70
           morphology : Euhedral
           comments   : Tabular crystals in glomerocrysts (10-12 
                        crystals).Some solitary phenocrysts. 

                        ***** GROUNDMASS *****
Acicular. Fluidised texture. 
Plagioclase            present %  50    original %  50     size <1
                         ****** VESICLES *****
Type: Vesicles   %: <<1
      filling : None
      shape   : Round
Rare empty vesicles. 
                ****** SECONDARY MINERALIZATION ******
mineral name:  Clays                     percent:  22
      replacement: 
      comments   : Palagonite from glass. Replacing some 
cpx. 
                     ****** OVERALL COMMENTS ******
Quenched texture. Typical features of groundmass glass devitrification. 

                ODP hard-rock thin section description - verbose form
   leg :  111                section:  01       unit/subunit : 0004
   hole: 678B                top int: 005 cm    observer code:  DIV
   core: 005X                 pieces: 001

       rock name: Plagioclase porphyritic basalt
         texture: Hyalopilitic

   where sampled: Pillow margin(?)

     grain size: Fine 

                        ***** PHENOCRYSTS *****
Olivine                   present %  0     original % ?       size ?         

           morphology : ?
           comments   : Possibly altered olivine crystal ~ 0.1 mm, now 
                        chlorite.

                        ***** GROUNDMASS *****
Microlites with some alignment. 
Plagioclase            present %  30    original %  30     size 0.5
                         ****** VESICLES *****
Type: Vesicles   %: 
      filling : None
      shape   : Elliptical
Open vesicles. 
                ****** SECONDARY MINERALIZATION ******
mineral name:  Clays                     percent:  55
      replacement: Glass, cpx
      comments   : Celadonite, sepiolite. 
                     ****** OVERALL COMMENTS ******
Rock shows typical quench texture with minor flow alignment of some microlites. 
Pyroxene is developed in patches in groundmass especially close to glomerocrysts 
of plag. Phenocrysts show skeletal growth on margins. 

introduction | data types | geographic areas | legs/sites/holes | sites/holes

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