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Season 4 Episode 6 | 4m 37s Video has closed captioning.
Fly into the 1980 crater of Mt. St. Helens and learn how volcanic forces are building a new lava dome as geologists train for the next volcanic eruption around the Pacific Rim.
Aired: 01/28/20
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Saddle Mountains Buried in Ash
When thirty feet of volcanic ash in Washington’s Saddle Mountains fell out of the sky.
