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             PHOTOGRAPHS FROM DOCTORAL DISSERTATION OF RICHARD HAYES PHILLIPS:
         "PROSPECTS FOR REGIONAL GROUNDWATER CONTAMINATION DUE TO KARST LANDFORMS
             IN MESCALERO CALICHE AT THE WIPP SITE NEAR CARLSBAD, NEW MEXICO"

LEFT:  Close-up of calcareous dissolution residue, 2 feet thick and 2 to 3 feet long,
resting directly on Dewey Lake Redbeds, section 30.  The caliche has been reduced to
soft pinkish sand due to solution and removal of much of its carbonate content.  Small
siltstone fragments are embedded in the calcareous material.  The soft caliche exposure
was bisected by a taproot, now gone; its path is filled with sand with some clay content.

RIGHT:  A large solution pipe in Mescalero caliche, 14 feet across, 75 inches deep,
floored by Dewey Lake Redbeds, in section 30.  In the background, the gray laminar
caliche zone is fractured but otherwise intact.  The caliche hardpan then dips 21
degrees, ending abruptly at a solution-enlarged joint 8 inches wide.  In the foreground,
the only visible carbonate is an exposure of dissolution residue in the trench wall.

For a full discussion of the geologic context of these photographs see "Direct Testimony"
                         http://www.cardnm.org/techsecfrm_a.html