What is Laurentia?
Laurentia is another name for North American Craton, a large and very old piece of rock on which North America is based. The "basement complex" - metamorphic and igneous rock under the sedimentary layer - Laurentia is 1.0 to 3.0 billion years old and was created in a tectonically active environment at high pressure and temperature. Its components are all igneous oxides such as granite. Like other continents, Laurentia is pushing around the ocean by spreading, hitting them, and sometimes creating supercontinents like Panga. Laurentian Craton is the basis of the entire North American continent, but only arrives on the surface in northern Canada, where sedimentary rocks were scraped during the last ice age. Laurentian Craton is the largest exposed area of Archaean (older than 2.5 billion years). TUBSHALY Numerous geological glasses, including Mackenzie Dike Swarm, 311 miles (500 km) wide and 1,864 miles (3,000 km) Long overview of chilled magma from an amazing eruption 1.2 billion years ago and the world's oldest SOPEk.
over the hundreds of millions of years, the shape of Laurentia has changed slightly due to impact on other krat; volcanic activity, especially large igneous provinces that can be extruded over a million years; and sedimentary growth. At the edge of the continents there is a place where the mountains are built due to the pressure between the collizing Krats. Laurentian Craton has mountain belts on both edges - including Sierra Nevadas in the west and Appalachians in the east.
The part of the reason why the name "Laurentia" is necessary is that the continent was in various different configurations in Cellého's history and does not necessarily have to be "north" from everything, which makes "North America" inappropriate. Laurentia was part of the Supercontinents Kenorland, Nesm, Columbia, Family, Protolaurasia, Pannotia, Eumerica, Panga, Laurasia and the current smaller supercontinent in America. After tens of millions of years, during chalk, Laurentia was divided by Dabout the center of the western inner marine direction. For this reason, you will find various marine fossils in the central US and Canada.