KARST IN NASH DRAW

          ALL PHOTOGRAPHS OF THE KARST NATURE TRAIL WERE TAKEN, AS THE CROW FLIES, WITHIN THREE MILES
          OF THE WIPP SITE, THE WORLD'S FIRST PERMANENT NUCLEAR WASTE DUMP NEAR CARLSBAD, NEW MEXICO.


  LEFT: Solution pits, formed when small pools of rainwater dissolve the gypsum.

  CENTER: Solution pits and rills on the wall of a collapse sink, formed when
  gypsum is dissolved and carried off the rock surface by dripping rainwater.

  RIGHT: Rillenkarren, parallel rills or furrows separated by sharp ridges, formed
  when rainwater dissolves the gypsum and washes downslope in a constant direction.