Flagstaff, AZ – Earth Notes: Entropy Happens
The Moab region is famous for its natural arches, which open like windows into the geological past. About 2,000 of these quirks grace Arches National Park, the result of ancient seas and their salt deposits.
Superimposed sandstone layers slipped, buckled, and cracked; weathering widened the gaps. Frost, water, and heat kept at their work. They enlarged hairline fractures, wrenched away supportive rock, and collapsed the center of some fins, eventually freeing arches from their surroundings.