EPSC 233 Lecture Notes - Lecture 19: Alleghanian Orogeny, Taconic Orogeny, Acadian Orogeny
6 Nov 2018
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Document Summary
Sauk sequence (cambrian - early ordovician): north american flooded by shallow seas, followed rifting on the eastern and western margins of the north america. North american and foreland basin in the east, subsequently exposed due to glacial eustasy and taconic orogeny. Kaskaskia (silurian-devonian): passive margin to foreland basin (arcadian orogeny) capped by the catskill clastic wedge. Extensive development of barriers reefs in western north america (devonian) at this time, which are now important petroleum reservoirs. Taconic orogeny (late ordovician - early silurian [440 ma]): collision of island arc with northeastern us/eastern canada (east- dipping subduction) Acadian orogeny (late devonian [375 to 325 ma]): collision of the. Avalon terrane with new england and eastern quebec (east- dipping subduction) Alleghenian orogeny (carboniferous [350 to 300 ma]): collision with northwestern gondwana, from se us to newfoundland. Ouachita orogeny (middle carboniferous): collision of part of. South america with southeastern laurentia; extension of the. Alleghenian orogeny, which began in the north and progressed southward.
