Arizona Geology
1:02:53
Grand Canyon Geology
53:44
Making North America: Origins | Full Documentary | NOVA | PBS
1:04:50
Paul Lindberg - Geologic Features of Archaeological Sites in Northern Arizona & the Colorado Plateau
1:08:17
Geology of the Rincon Mountains, Arizona with Dr. George Davis
20:53
Continents Collide: The Appalachians and the Himalayas
51:53
Ancient Arizona
36:55
Appalachian Geology: Surprising Implications
50:00