Laurentia meaning

lô-rĕn'shə
The North American craton which, according to the theory of plate tectonics, has existed since the Paleozoic Era and was once part of a supercontinent comprising present-day North America and Greenland.
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Origin of laurentia

  • After the Laurentian Shield, the continental shield underlying northeast North America that forms the nucleus of the North American continent after the Saint Lawrence River
    From American Heritage Dictionary of the English Language, 5th Edition