PHOTOMICROGRAPH SCANS
                             READ ME

     This briefly describes the contents of the PHOTOMIC folder.
There are three subfolders, PHOTOLOG, PHOTOTIF, and SCALES, as well
as two files, RULERS.PDF and README.TXT.
     During Leg 176, following the shooting of a calibration roll,
seven rolls of photomicrographs were shot using either a Zeiss
polarizing axioscope for higher magnifications or a Zeiss polarizing
stereoscope for lower magnifications. In PHOTOLOG, photo data for 
rolls 2 through 8 are included as ASCII and PDF files following the
labeling convention of PHOT_R2.TXT and PHOT_R2.PDF. In each file, 
the photomicrographs are listed in the order in which they were shot 
by the frame number on the negatives and the contact sheets, which 
are on file at the Ocean Drilling Program. The thin-section 
identification and objective magnification are also listed, as well 
as a brief description of the subject of each photomicrograph and 
whether the photographs were obtained using transmitted, reflected, 
or cross-polarized light. Total magnifications are 10x objective 
magnifications.
     RULERS.PDF gives the scale bars for each objective 
magnification and photographs of the scales, which also can be found
individually in the SCALES folder. Within the SCALES folder
are two subfolders AXIOSCOP and BINOCULR. The individual files used
to create the RULERS.PDF file are contained within these two folders
and follow the naming convention of MAG10X.PDF for a magnification of
10x. In MAG2P5X.PDF the "2P5X" means "two point five magnification."
     During Leg 176 more than 100 of these photomicrographs were
scanned from 8 in x 11 in prints at 150 dpi. These are stored as TIFF
files in PHOTOTIFF. The individual scanned images are identified by
their roll and frame number. Each PHOTOLOG file also has a column 
indicating which were scanned. For example, roll 2, frame 3 is 
02_03.TIF. In general, photomicrographs were selected for scanning 
on the basis of photo quality and usefulness. Those not scanned may 
be out of focus, unevenly illuminated, repetitive shots at different 
exposures, or poorly composed.
     The photomicrographs that were used for illustrations in the
Site Report were professionally rescanned at 350 dpi. These are 
embedded in the site report itself. Each PHOTOLOG file has a 
column indicating which photomicrographs were used as figures and
gives the corresponding figure number. The interested user of these
files may consequently view or copy figures from the site report
and/or the scanned photomicrographs in PHOTOTIFF. Prints of any of
the photomicrographs may be requested from the Data Librarian of
the Ocean Drilling Program by e-mail at database@odp.tamu.edu.