Permian Period (245 to 286 million years ago)
Alluvial fans and rivers from the ancient Uncompaghre Mountains (also called the ancestral Rockies)
Irregular layer of dark red, lumpy sandstones, mudstones and conglomerates.
The Cutler Undivided begins west of the Uncompaghre Plateau along the Utah-Colorado border. Differentiated elements of the Cutler Group begin to appear along the eastern boundary of Canyonlands National Park.
Fisher Towers along Highway 128 (northeast of Moab).