https://www.usgs.gov/media/images/jackson-glacier-1911
Jackson Glacier 1911. Images that were acquired from the University of Montana may be protected by copyright. Permission may be required for use. View the...
jackson glaciergeological survey
https://www.usgs.gov/centers/norock/science/blackfoot-jackson-glacier-1914-2009
At the time the 1914 photograph was taken, Blackfoot and Jackson Glaciers were joined by their expansive margins. The 2009 photograph shows how each glacier...
jackson glaciergeological surveyblackfoot