After Hours

Images from the U.S. Geological Survey

Muir Glacier in Glacier Bay National Monument, 1941

This August 1941 photograph is of Muir Glacier in Glacier Bay National Monument, Alaska. It shows the lower reaches of Muir Glacier, then a large, tidewater calving valley glacier and its tributary, Riggs Glacier. For nearly two centuries before 1941, Muir Glacier had been retreating. In places, a thickness of more than two-thirds of a mile of ice had been lost.

Credit: U.S. Geological Survey
Department of the Interior/USGS
U.S. Geological Survey/photo courtesy National Snow and Ice Data Center and Glacier Bay National Park and Preserve Archive

By Selena Frye

Selena has been at TechRepublic since 2002. She is currently a Senior Editor with a background in technical writing, editing, and research. She edits Data Center, Linux and Open Source, Apple in the Enterprise, The Enterprise Cloud, Web Designer, and...