37:13

Jason McClaughry: Clarno Magmas

31:15

Michael Eddy: Teanaway Formation

44:48

Do Ancient Shorelines Reveal the True Origin of the Grand Canyon? - Dr. Steve Austin

1:58:41

L. More Ridge Migration

1:11:15

Ghost Volcanoes in the Cascades

1:57:36

A. 'Decades By Color'

1:18:44

Bretz's Spokane Flood & The Missoula Floods

1:19:43

What Happened When Mount St. Helens Erupted? - Dr. Kurt Wise