File name:


Title: Crater Lake.
Caption: This animation depicts the formation of Crater Lake from ancient Mount Mazama. Major eruptions empty the upper portion of Mount Mazama's underlying magma chamber. Mount Mazama collapses into the magma chamber, creating a large caldera. Rains subsequently filled the caldera, creating Crater Lake. A later cinder-cone eruption.
Keywords: igneous rocks, composite volcanoes, lava flows, Crater Lake, Mount Mazama, calderas, Wizard Island, Cascade Mountains