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Laramidia
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Laramidia
Laramidia
was an island continent that existed during the
Late Cretaceous
period (99.6–66
Ma
), when the
Western Interior Seaway
split the continent of
North America
in two. In the
Mesozoic
era, Laramidia was an island land mass separated from
Appalachia
to the east by the
Western Interior Seaway
. The seaway eventually shrank, split across the
Dakotas
, and retreated towards the
Gulf of Mexico
and the
Hudson Bay
. The masses joined to unite the
North American
continent.
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