Henrys Fork Caldera: Yellowstone's Last Caldera Eruption Completely in Idaho
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"Old" Yellowstone in southern Idaho: amazing deposits of pyroclastic flows from explosive eruptions
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Why Is This A "Sinking Canyon"?
59:50
Gold Geology Of Subduction Zones, North Cascades, Washington State
39:10
Explore Numerous Layers of Petrified Trees: Yellowstone National Park
23:45
Lava vs. Water: The Fascinating Geology of Idaho's Menan Buttes
45:52
The 200-Million-Year Formation Of The Rocky Mountains | Spark
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Alaska's Deadly Waves - Hidden In America - Documentary
20:59