East Arm of Glacier Bay National Park

https://www.nature.nps.gov/geology/GLBA/glaciers.htm

This website features six animated photo pairs of over 100 years of  ecosystem  evolution  in Glacier Bay.

Many students see glaciers as a static feature.   This series of animations show how glaciers change over time.   I would use this webpage as a short clip during a lecture.   I may ask the students to see if they can determine how many of the site are retreating, advancing or are stagnant.

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