They're one of Earth's greatest phenomenons ? rivers of ice flowing from mountain peaks to the oceans. From the shattering roar of calving tidewater glaciers to the frigid world of the tiny ice worms, join the US Geological Survey as they explore the wonders of Glaciers: Alaska's Rivers of Ice. Learn about the formations of Ar?tes and Fjords, as well as the difference between eskers and moraines. Explore the elaborate geometry of Ogives, Cirques and Seracs, while discovering the dramatic dynamism of jokulhaups and the overall physics behind the intense blue beauty of glacier ice.

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