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A super continent Rodinia becomes unstable,

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It rifts along what's now the west coast of America

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An ancestral continent called Laurenta, which grows over the next few million of years.

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As Island chains collide with it and add land mass

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Off today's east coast, the massive Africa plate inches westward

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The African plate finally collides with Laurenta to form another supercontinent(Pangea)

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The immense pressure causes faulting and folding, stacking up rock to form the Appalachian Mountains

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The super continent Pangea breaks apart opening the Southern Atlantic Ocean between the new North American Plate and the African Plate.

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Now the eastward-moving Farallon Plate, converges with the present-day west coast. The Farallon Plate's greater density makes it sink beneath North America

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Pangea breaks apart, opening the southern Atlantic Ocean betwen the North America plate and the Africa Plate

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The Farallon Plate becomes less steep, causing volcanism to strech eastward and eventually cease

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It compresses North America thrustig up mountain ranges like the Rockies which extend over 3.000 miles

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Soon after, the Eaurasian Plate rifts ffrom North America opening the North Atlantic Ocean

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The Colorado Plateau now upfits, likely due to a combination of upward mantle flow and a thickened North American Plate

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The majority of the Farallon Plate sinks into the mantle, leaving behind only small corners that still subducting

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Magma from the mantle burns a giant hole into western North America