laurentia wikipedia - EAS
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Laurentia or the North American Craton is a large continental craton that forms the ancient geological core of North America. Many times in its past, Laurentia has been a separate continent, as it is now in the form of North America, although originally it also included the cratonic areas of Greenland and
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See moreIn eastern and central Canada, much of the stable craton is exposed at the surface as the Canadian Shield, an area of Precambrian rock covering over a million square miles. This include some of the oldest rock on Earth, such
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See moreAssembly
Laurentia first assembled from six or seven large fragments of Archean crust at around 2.0 to 1.8 Gya. The assembly began when the Slave craton collided with Rae-Hearne craton, and the Rae-Hearne craton collided shortly...
See moreSeveral climate events occurred in Laurentia during the Phanerozoic eon. During the late Cambrian through the Ordovician, sea level fluctuated with ice cap melt. Nine macro scale fluctuations of "Global hyper warming", or high intensity greenhouse gas
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See more• Around 4.03 to 3.58 Ga, the oldest intact rock formation on the planet, the Acasta Gneiss, was formed in what is now Northwest Territories (older individual mineral grains are known, but not whole rocks).
• Around 2.565 Ga, Arctica formed as an independent continent....
See more• North Atlantic Craton – Archaean craton exposed in southern West Greenland, the Nain Province in Labrador, and the Lewisian complex in
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See more• Paleogeography of the Southwestern US, paleogeographic history of southwestern Laurentia, goes back to 1.7 billion years ago.
• Mesozoic Paleogeography and Tectonic History, Western North America – Paleogeographic history of western Laurentia, goes back to...
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Laurentia - Wikipedia