Crater Lake National Park, OregonCrater Lake was formed when a stratovolcano called Mount Mazama col
Crater Lake National Park, OregonCrater Lake was formed when a stratovolcano called Mount Mazama collapsed during a massive, explosive eruption 7,700 years ago that blew ash 30 miles high and deposited it over much of the Pacific Northwest and parts of southern Canada. The 1,943-foot deep lake is the deepest in the U.S. and took around 740 years to fill. (Click through for more). -- source link
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