January 1993
Alaska River Guide (9780882404974);1993, p36
The article presents information on river freezing in Alaska. Many northern rivers have aufeis or overflow ice. As rivers begin freezing, they flow up and over the new ice, creating layer upon layer of ice. Aufeis can block river channels or calve into the river like icebergs. Glaciers and icebergs can rip a raft or folding boat. Glaciers calve massive chunks of ice without warning.


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