JOHN R. FOSTER / SCIENCE PHOTO LIBRARY JOHN R. FOSTER / SCIENCE PHOTO LIBRARY
Oregon's famous Crater Lake basks in the light of a bright late summer day. Crater Lake was formed from the violent eruption and caldera collapse of ancient Mt. Mazama 7,700 years ago. Rain and snow melt gradually filled the caldera to a depth of 1,943 feet. Oregon, USA.
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