9:43
The Alleghanian Orogeny
20:53
Continents Collide: The Appalachians and the Himalayas
19:19
The Appalachian Rainforest
59:50
Gold Geology Of Subduction Zones, North Cascades, Washington State
1:20:43
Evolution of the Appalachian Mountains
26:01
Surprising Implications of a Cave Discovery
24:22
Why does Appalachia have so many mountains with coal under them?
31:51