(also known as Laurussia
which is not to be confused with Laurasia
, the Old Red Continent
or the Old Red Sandstone Continent
) was a minor supercontinent
created in the Devonian
as the result of a collision between the Laurentian
, and Avalonia cratons
during the Caledonian orogeny
, about 410 million years ago. In the Late Carboniferous
, tropical rainforests
lay over the equator of Euramerica. A major, abrupt change in vegetation occurred when the climate aridified. The forest fragmented and the lycopsids
which dominated these wetlands thinned out, being replaced by opportunistic ferns. There was also a great loss of amphibian diversity and simultaneously the drier climate spurred the diversification of reptiles.
Euramerica became a part of the major supercontinent Pangaea in the Permian. In the Jurassic, when Pangaea rifted into two continents, Gondwana and Laurasia, Euramerica was a part of Laurasia.
In the Cretaceous, Laurasia split into the continents of North America and Eurasia. The Laurentian craton became a part of North America while Baltica became a part of Eurasia, and Avalonia was split between the two.
This page was last edited on 30 December 2017, at 12:04.
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