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Laurasia was the northernmost of the two large continents produced by the breakup of Pangaea
What is Laurasia?
Laurasia was the more northern of the two large landmasses that were part of the supercontinent Pangea (Mya) about 335 to 175 million years ago, the other being Gondwana. did. It separated from Gondwana between 215 and 175 Mya (beginning in the Late Triassic) during the breakup of Pangea, drifted further north after the breakup, and finally split off at the opening of the North Atlantic Ocean c. 56 Mya. The name is a portmanteau of Laurentia and Asia.
Laurentia, Avalonia, Baltica, and some smaller terrains collided in the Caledonian orogeny c. At 400 Ma, Laucia (aka Eura-America or the ancient red sandstone continent) forms. Laurusia then collided with Gondwana, forming Pangea. Kazakhstan and Siberia were then added to Pangea 290-300 Ma to form Laurasia. When Pangea split into Gondwana and Laurasia, Laurasia eventually became an independent continental mass.
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