Sperry Glacier in Glacier National Park, circa 1936. Image 4 of 7

Detailed Description
Glacier National Park. Sperry Glacier. View south up the steep front of the main glacier, showing stratified ice and dirt bands. Glacier National Park, Flathead County, Montana. July 25, 1936. http://libraryphoto.cr.usgs.gov/htmlorg/lpb448/land/awc02270.jpg
Sources/Usage
Public Domain.