Image:MtChurchill-CalderaRim.jpg

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[edit] Summary

Description

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. Wrangell-St. Elias National Park and Preserve, Alaska, USA
Source

http://pubs.usgs.gov/dds/dds-39/
Date

May 20, 1990
Author

G. Dubois, U.S. Geological Survey
Permission
(Reusing this image)
Public domain This image is in the public domain because it contains materials that originally came from the United States Geological Survey, an agency of the United States Department of Interior. For more information, see the official USGS copyright policy


File history

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Date/TimeDimensionsUserComment
current04:19, 22 April 20071,024×711 (231 KB)Seattle Skier ({{Information |Description= 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 )
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