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Tom Brigham and Game McGimsey of the U.S. Geological Survey climbing party reaching the east rim of the summit caldera on 4,766-m (15,636 ft)-high Mount Churchill, site of two of the most voluminous explosive eruptions in North America in the past 2,000 years. Blocky debris in the photo consists of pumice and lithic fragments ejected 1,250 years ago. This deposit forms the eastern lobe of the White River Ash. Photo by G. Dubois, U.S. Geological Survey, May 20, 1990.

Tom Brigham and Game McGimsey of the U.S. Geological Survey climbing party reaching the east rim of the summit caldera on 4,766-m (15,636 ft)-high Mount Churchill, site of two of the most voluminous explosive eruptions in North America in the past 2,000 years. Blocky debris in the photo consists of pumice and lithic fragments ejected 1,250 years ago. This deposit forms the eastern lobe of the White River Ash. Photo by G. Dubois, U.S. Geological Survey, May 20, 1990.

Date: May 20th, 1990
Volcano(es): Churchill, Mt
Photographer: DuBois, G. D.
URL: avo.alaska.edu/image/view/308
Image courtesy of AVO / U.S. Geological Survey.
Please cite the photographer and the Alaska Volcano Observatory/U.S. Geological Survey when using this image.
Full Resolution.