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Lamplugh GlacierLamplugh Glacier, in Glacier Bay, Alaska, shows the snout of a typical tidewater glacier. Because the surface of the ice is heavily crevassed and jagged, small bits of ice have broken off, seen here floating in the water. —AGS collection, 1941, at the National Snow and Ice Data Center, Boulder

NSIDC supports research into Earth's frozen regions, including glaciers. This Data & Science section provides links to glaciology resources within NSIDC and across the Web.