Ancient glaciers still affect the shape of North America

Long after the disappearance of the glaciers that once covered much of North America, the land they rested upon is still recovering from their weight - and the slow movement of this recovery includes horizontal motion never seen before, say Purdue scientists.

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<p><a href="http://www.physorg.com/news9047.html">Ancient glaciers still affect the shape of North America</a></p> <p>Long after the disappearance of the glaciers that once covered much of North America, the land they rested upon is still recovering from their weight - and the slow movement of this recovery includes horizontal motion never seen before, say Purdue scientists. </p>