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
1:19:12
8 Weeks on Foot Through the Grand Canyon by James Mauch
59:45
A Billion Years of Early Earth History: Perspectives from MN’s Nearest (Canadian) Neighbor
1:11:55
Tales Told By Trilobites
1:35:01
Constructing Oregon
1:07:23
Geology of North Carolina
1:58:20
Melodies of the Middle Ages - Calming Medieval Music for Study , and Relaxation
44:41