laurentide ice sheet

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Definition of laurentide ice sheet in English English dictionary

Principal glacial cover of North America during the Pleistocene epoch (1.8 million-10,000 years ago). At its maximum extent it spread as far south as latitude 37° N and covered an area of more than 5 million sq mi (13 million sq km). In some areas its thickness reached 8,000-10,000 ft (2,400-3,000 m) or more