1:13:17

Plant Fossils in the Pacific Northwest

1:25:20

Jeff Tepper - Initiation of the Cascade Volcanic Arc

1:11:15

Ghost Volcanoes in the Cascades

1:29:49

Learn how Supervolcanoes caused the World’s Largest Landslide in Wyoming

1:19:43

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

39:10

Explore Numerous Layers of Petrified Trees: Yellowstone National Park

56:49

Siletzia Fireworks in the Pacific Northwest

35:40

Hundreds of Walls Lead to Evidence of Catastrophes Near Yellowstone