Roadside Geology of Arizona

The rise of mountains and the spread of deserts has marked the geologic history of Arizona. Landscapes that we see today are here because of landscapes of the past, and because of tremendous forces deep within the earth, forces that carry continents into collisions and then drag them apart again, forces of heat and pressure and the slow churning boil of the earth's interior. Chronic, Halka Paperback, 322 pages June 15, 1983 Ninteenth printing, January 2005