At the summit of 2,135-m (7,005 ft)-high Mount Douglas volcano on the northeastern tip of the Alaska Peninsula is a warm and highly acidic crater lake approximately 160 m (525 ft) wide. Photograph by C. Neal, U.S. Geological Survey, June 4, 1990.
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.
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