Crater Lake, Oregon; another BIG ONE only a matter of TIME

Mount Mazama, once over 12,000 feet in elevation, went through a half-million years of alternating eruptions and quietude. Between seven and eight thousand years ago, Mount Mazama erupted violently numerous times, covering eight states and three Canadian provinces with six inches of ash. These eruptions produced 150 times the ash as the Mount St. Helens eruption in 1980.

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