Mazama · Where a mountain subsided

Exploration · Quaternary

Mazama · Where a mountain subsided

Formation context about 7,700 years ago → present landscape · map shows today’s location

Interpretive illustration based on the present landforms of Crater Lake and Wizard Island; not a photograph, survey or reconstruction of the collapse about 7,700 years ago.

Crater Lake in Oregon occupies a caldera formed when central Mount Mazama collapsed during a major eruption about 7,700 years ago. New volcanic edifices grew while the basin filled with water.