Grand Canyon: Young Canyon, Old Rocks (A journey through the geologic history of the Grand Canyon)
1:01:28
A Brief Geologic History of Colorado
1:24:15
The River That Flows Uphill: Geologic evolution of the upper Mississippi River valley...
1:11:55
Tales Told By Trilobites
1:35:01
Constructing Oregon
48:52
Nevada: America's True Golden State
1:24:14
Volcanic Features and Highlights of Southern Idaho, Shawn Willsey, M. Sc.
1:07:23
Geology of North Carolina
1:02:18