THE ARIZONA STORY …

…began when the sea covered everything and the land was an ocean floor. As the water receded and the earth’s crust began to dry and settle, volcanos spouted hot lava and mountain ranges were pushed high into the air. Remaining Mogolon Rim waters became rivers and streams cutting deep canyons, and some areas became so dry, deserts were formed.

This process of land formation took millions of years, and when the earth ceased its restlessness, it left a pattern of great variety and contrast.

The southwest corner of the state became desert, with craggy, barren mountains rising abruptly from its level floor. In the southeast corner, rolling hills with sparse vegetation and the “Wonderland of Rocks” developed.

Read the full article here: http://azgovernor.gov/AZSpotlight/Kids_History.asp