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. Landscape features result, too, from more comprehensible, more recent forces: the unending attack of water and wind and frost, the building of volcanoes, the short-term geologic happenings like landslides and rockfalls, earthquakes and floods, and a gopher digging a hole.

Author: Halka Chronic
Binding Type: Paperback
Publisher: Mountain Press
Published: 06/15/1983
Series: Roadside Geology
Pages: 322
Weight: 1.15lbs
Size: 9.04h x 5.90w x 0.83d
ISBN: 9780878421473

About the Author
Chronic, Halka: - Halka Chronic received a doctorate in geology from Columbia University in 1949. Her career took her all over the globe�from teaching at Haile Sellassie University in Ethiopia to identifying Geologic Landmarks for the U.S. National Park Service in the southern Rockies. She spent more than thirty years in Boulder, Colorado, working as an editor and raising her daughters.