U.S. DEPARTMENT OF THE INTERIOR / U.S. GEOLOGICAL SURVEY
                                
                                
        U.S. GEOLOGICAL SURVEY DIGITAL DATA SERIES DDS-13
                                
              International Phase of Ocean Drilling
                Seismic Line 1 Demultiplexed Data
               Cape Hatteras to Mid-Atlantic Ridge
                                
                           README.1ST
                                

INTRODUCTION

     This CD-ROM is part of a 39 disc collection containing the
demultiplexed seismic data from a 3400-km-long multichannel
seismic-reflection profile extending from Cape Hatteras, N.C., to
the rift valley of the Mid-Atlantic Ridge.  The data were
collected in 1974 as part of the International Phase of Ocean
Drilling (IPOD) which was jointly funded by the U.S. Geological
Survey (USGS) and the National Science Foundation's Deep Sea
Drilling Project (DSDP).  Each disc in the collection contains:

   * Binary files of SEG-Y format demultiplexed seismic data for
     a portion of the profile.
   
   * Graphic image files of the original observers' logs kept
     during data acquisition.
   
   * A text file of shotpoint locations and a graphic image of a
     figure illustrating those locations.
   
   * DOS-based software allowing:
   
          - interactive display of the SEG-Y demultiplexed data.
          - interactive display of the observers' logs graphic
            images.
          - interactive SEG-Y data review and editing.
   
   
   * Documentation.
   
     Please see OVERVIEW.TXT in the DOCFILES subdirectory for
more information.











                                 1

     This CD-ROM has been produced in accordance with the
International Standards Organization (ISO) 9660 standard.  The
data and text files can be read by any platform having CD-ROM
driver software that supports this standard.


DOS SOFTWARE INSTALLATION

     The software on disc may be used from the DOS command line
or through a menu system which may be installed.  To run the
software from the command line, use the programs as described by
the appropriate documents.  Please see SOFTWARE, below. In order
to install the menu system:

   * Place the CD-ROM in the CD-ROM reader.
   * Make the CD-ROM reader the current working directory.
   * Type INSTALL.

     This will place a file named DDS13.BAT in a user-specified
directory which will execute the menu system.  To use the menu
system, make that user-specified directory the current working
directory, and type "DDS13" at the DOS command line.

     This information is repeated in the documentation file
GETSTART.TXT.


MINIMUM DOS SYSTEM REQUIREMENTS

     The minimum DOS system requirements to use the data and
display software are as follows:

     * IBM or compatible personal computer, having an 80286 or
       higher numbered processor.  An 80386 or higher is
       recommended.
     * 512 kb RAM.
     * MS- or PC-DOS version 3.1 or later.
     * Microsoft MSCDEX version 2.1 or later.
     * CD-ROM drive with ISO 9660 software driver.
     * EGA, VGA, or Hercules graphics system.















                                 2

                           DISCLAIMER

     This Compact Disc-Read Only Memory (CD-ROM) publication was
prepared by an agency of the United States Government.  Neither
the United States Government nor any agency thereof, nor any of
their employees, make any warranty, expressed or implied, or
assumes any legal liability or responsibility for the accuracy,
completeness, or usefulness of the information, apparatus,
product, or process disclosed in this report, or represents that
its use would not infringe privately owned rights.  Reference
therein to any specific commercial product, process, or service
by trade name, trademark, manufacturer, or otherwise does not
necessarily constitute or imply its endorsement, recommendation,
or favoring by the United States Government or any agency
thereof.

     Although all data and software published on this CD-ROM have
been used by the USGS, no warranty, expressed or implied, is made
by the USGS as to the accuracy of the data and related materials
and/or functioning of the software.  The act of distribution
shall not constitute any such warranty and no responsibility is
assumed by the USGS in the use of this data, software, or related
materials.
































                                  3