J Harlen Bretz and the Ice Age Floods: New Discoveries
36:20
Megan Anderson - Siletzia in the Basement
56:24
Ice Age Geologists look for Glacial Till near Spokane
1:39:23
Nick Zentner - J Harlen Bretz and the Ice Age Floods: New Discoveries
34:13
The Mountain Range That Disappeared and Came Back Again
1:24:25
Nick Zentner - Bretz and the Channeled Scablands: New Discoveries
1:10:57
What Happened to the Spokane Ice Sheet?
43:36
How Geologists Discovered and Mapped a Great Seaway
26:41