Massive Earthquake Swarm at ‘Mammoth Lakes’ In California’s Long Valley Caldera!

Dahboo77

Mammoth Mountain is a lava dome complex in the southwestern corner of the caldera, consisting of about 12 rhyodacite and dacite overlapping domes. These domes formed in a long series of eruptions from 110,000 to 57,000 years ago, building a volcano that reaches 11,059 feet (3,371 m) in elevation.


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