Transcript Document

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