Roughly centered on the Four Corners region of the southwestern United States, the Colorado Plateau covers some 130,000 square miles of sparsely vegetated plate

The Colorado Plateau encompasses the high desert country of Colorado, New Mexico, Arizona, and Utah. Illustrated with a guide's eye for the fascinating natural

The geology of an area covering 3,900 square miles in the northeastern part of Mojave Desert, including mountain ranges 6,000-7,000 feet in altitude.