CCSD3ZF0000100000001NJPL3IF0PDS200000001 = SFDU_LABEL
RECORD_TYPE                    = STREAM
PRODUCT_CREATION_TIME          = 1993-07-27
OBJECT                         = TEXT
  NOTE                         = "Special image file description."
END_OBJECT                     = TEXT
END    
 
                             Olympus Mons
                             -------------

The image files contained in the SPECIAL/735A sub-directory are a mosaic
of Olympus Mons. The mosaic was created with the medium-resolution
Black/White MDIM combined with a low resolution color image mosaic
acquired on the 735 orbit of Viking 1 on June 22, 1978.

The cental edifice of Olympus Mons has a summit caldera 24km above the
surrounding plains. Surrounding the volcano is an outward-facing scarp
550 km in diameter and several kilometers high. Beyond the scarp is a
moat filled with lava, most likely derived from Olympus Mons. Farther
out is an aureole of characteristically grooved terrain, just visible at
the top of the frame. 

Image Processing by Jody Swann/Tammy Becker/Alfred McEwen, using the
PICS (Planetary Image Cartography System) image processing system
developed at  the U.S. Geological Survey in Flagstaff, Arizona.