Closeup of clacareous dissolution residue, 2 feet thick and 2 to 3 feet long, resting directly on the Dewey Lake Redbeds. 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 red sand with some clay content. (Photo by Dr. Richard Phillips)