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West Thumb
The water level in many of the pools of the West Thumb Geyser Basin appears to have dropped since Jackson first photographed them in August 1871 by Bradly J. Boner Original public domain image from Flickr
West Thumb
The water level in many of the pools of the West Thumb Geyser Basin appears to have dropped since Jackson first photographed them in August 1871 by Bradly J. Boner Original public domain image from Flickr
Public DomainFree CCO U.S. Government image for Personal and Business use