Euramerica

Euramerica (also known as Laurussia (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, Baltica, and Avalonia cratons (Caledonian orogeny). 300 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.

    Extent

    Euramerica in the Devonian

    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.

    Events

    Carboniferous: Climate change devastated tropical rainforests, fragmenting the forests into isolated 'islands' and causing the extinction of many plant and animal species during the Carboniferous Rainforest Collapse (CRC).

    Permian: Euramerica became a part of the major supercontinent Pangaea

    Jurassic: Pangaea rifted into Gondwana and Laurasia

    Cretaceous: Laurasia split into the continents of North America and Eurasia.

    See also

    References

    External links

    • Palaeos Earth: Geography: Euramerica
    • Paleogeographic globe of the Devonian Earth


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