Volcano Erupted Under California's Mono Lake: Exploring Black Point Volcano
20:59
Why Are There Volcanoes And Obsidian At California's Salton Sea?
39:10
Explore Numerous Layers of Petrified Trees: Yellowstone National Park
23:36
"Old" Yellowstone in southern Idaho: amazing deposits of pyroclastic flows from explosive eruptions
28:10
The Mono Lake Story
51:50
Our Journey to the Arctic on Alaska's Most Feared Road
20:13
The Massive Eruption of California's Supervolcano: Evidence in Owens River Gorge
9:06
Trillions of Animals Rely On This Lake (And It's Drying Up)
19:03