panottia – gondwana end of proterozoic 500 my ago
Post on 19-Dec-2015
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Panottia – Gondwana End of Proterozoic 500 my ago
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Rifting: Gondwana and Laurentia
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Taconic Island Arc moves toward Laurentia from 510 mya to 450 mya
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Alleghenian Orogeny
Africa collides with Laurentiabut does not subduct.Hits Greenland first, thenrotates in toward eastern North America.Final collision to form thePresent day Appalachians.Sediments uplifted; basement rocks folded and upliftedIapetus Ocean closedPangea formed
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PANGAEA - 255 million years ago Yellow = North America Green = South America
Light blue = Africa Red = Eurasia Dark blue = Australia Fuchsia = Antarctica
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