Panottia – Gondwana End of Proterozoic 500 my ago.

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Presentation transcript:

Panottia – Gondwana End of Proterozoic 500 my ago

Rifting: Gondwana and Laurentia

Taconic Island Arc moves toward Laurentia from 510 mya to 450 mya

Alleghenian Orogeny Africa collides with Laurentia but does not subduct. Hits Greenland first, then rotates in toward eastern North America. Final collision to form the Present day Appalachians. Sediments uplifted; basement rocks folded and uplifted Iapetus Ocean closed Pangea formed

PANGAEA million years ago Yellow = North America Green = South America Light blue = Africa Red = Eurasia Dark blue = Australia Fuchsia = Antarctica