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ice sheet |
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ice sheet [′īs ‚shēt] (hydrology) A thick glacier, more than 19,300 square miles (50,000 square kilometers) in area, forming a cover of ice and snow that is continuous over a land surface and moving outward in all directions. Also known as ice mantle. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| This sudden appearance of islands is a symptom of an ice sheet going into retreat, say scientists. At that time, the ice sheet that covered much of northeastern North America was retreating northward past Lake Superior, and rivers flowing into the lake were carrying distinctive reddish sediments that had eroded from nearby bedrock. Follow its journey from a snowflake to a giant ice sheet at: www. |
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