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The caldera was formed around 7,700 years ago in a massive volcanic eruption that lead to the subsidence of Mount Mazama around 5700 BC ..

2006-12-12 07:20:29 · answer #1 · answered by Geo06 5 · 0 0

4900 BC Massive volcanic explosion at Crater Lake, Oregon, US
Or, another estimate:
"Located in the Cascade Region of southern Oregon, Crater Lake was formed when a 12,000-foot volcano known as Mount Mazama exploded about 7,700 years ago. "

Wonderful place to visit!!

2006-12-12 14:26:22 · answer #2 · answered by Yahzmin ♥♥ 4ever 7 · 0 0

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