Glacial retreat. Image 2 of 2. Mountainside in Glacier National Park, Montana, USA, in 1988. This area of dry land was formerly occupied by Boulder Gl

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Glacial retreat. Image 2 of 2. Mountainside in Glacier National Park, Montana, USA, in 1988. This area of dry land was formerly occupied by Boulder Glacier. Glaciers are large, slow-moving expanses of ice, formed from compacted layers of snow. They are sensitive to climate change and in recent years most have retreated dramatically. See image E235/378 for a photograph of the glacier in 1932 from the same viewpoint.

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Size: 5118px × 3449px
Photo credit: © US GEOLOGICAL SURVEY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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