glaciation

  • Alaskan Glacier
    Public Domain
    1:30pm Aug 05, 2016
    Science Science

    Alaskan Glaciers Tell A Story Of Deep Time

    Rock, once a seafloor of mud, sand, and pebbles, towers into the sky, only to erode away, becoming a new and different seafloor, layered like pages in a book.

    Appalachian State University's Dr. Ellen Cowan reads these pages, most recently off the coast of Alaska. They tell the full story of geological changes on the continent, as written by glaciers over millions of years.