Earthquake Dome and Dry Creek Dome, Long Valley Caldera, California

Photo Information

Photograph by S.R. Brantley on August 2, 1998

View of Mammoth Mountain is toward the south-southwest. Dry Creek Dome and Deer Mountain are thick individual rhyolite flows (moat rhyolites) that were erupted about 100,000 and 115,000 years ago, respectively. Earthquake Dome consists of rhyo-dacite lava that is similar to the lava flows that built Mammoth Mountain; the dome was erupted about 148,000 years ago.

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Map of the Long Valley area

U.S. Department of the Interior, U.S. Geological Survey, Menlo Park, California, USA
URL http://lvo.wr.usgs.gov/gallery/32022545-065_caption.html
Contact: Long Valley Web Team
Last modification: 9 October 1999 (SRB)