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Related to Laurasia: Panthalassa
The supercontinent of the Northern Hemisphere that, according to the theory of plate tectonics, broke up into North America, Greenland, Europe, and Asia except for the Indian subcontinent.
[New Latin Laur(entia), geologic precursor of North America (after the Saint Lawrence River) + (Eur)asia.]
[C20: from New Latin Laur(entia) (referring to the ancient N American landmass, from Laurentian strata of the Canadian Shield) + (Eur)asia]
Laur•a•sia(lɔˈreɪ ʒə, -ʃə)
a hypothetical landmass in the Northern Hemisphere that separated near the end of the Paleozoic Era to form North America and Eurasia.
A supercontinent of the Northern Hemisphere made up of the landmasses that currently correspond to North America, Greenland, Europe, and Asia (except India). According to the theory of plate tectonics, Laurasia formed at the end of the Precambrian Eon and broke up in the middle of the Mesozoic Era. Compare Gondwanaland.