Icefall
U.S. Geological Survey photo by Bruce Molnia (fair use policy)
Glaciers have icefalls where a river would have a waterfall or a cataract. This picture shows the Vaughn Lewis Icefall, part of Vaughn Lewis Glacier in southeastern Alaska. The glacier ice in an icefall moves down the steep gradient by flow rather than spilling in a loose avalanche, but it becomes more heavily fractured and has many more crevasses.
Fossils
Geologic Features and Processes
Glaciers and Ice
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Geology and Society
