An ice sheet is a mass of glacier ice that covers surrounding terrain and is greater than , thus also known as continental glacier.American Meteorological Society, Glossary of Meteorology The only current ice sheets are in Antarctica and Greenland; during the last glacial period at Last Glacial Maximum (LGM) the Laurentide ice sheet covered much of North America, the Weichselian ice sheet covered northern Europe and the Patagonian Ice Sheet covered southern South America.
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