sperry pan anim

The 1913 image of Sperry Glacier shows the thickness of the glacial ice that once covered the Sperry basin. Now, at approximately 1/3 of it's maximum area, Sperry Glacier continues to recede at a rapid rate. It is one of the glaciers that USGS scientists are monitoring as a benchmark glacier.

NOTE: Proper credit for any of the photographs should include the photographer and the source (eg. T.J. Hileman, courtesy of Glacier National Park Archives). View the paired images to see examples of proper crediting for each photo. For more information see the section Use Guidelines and Proper Crediting.

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