GEO 103 Lecture 21: Paleozoic to Permean
28 Mar 2017
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Document Summary
Numerous shallow-water marine transgressions and regressions over interiors controlling sedimentation. Global sea level changes related to plate tectonics and glaciation. Recall formation of rodinia supercontinent during late proterozoic. Each continent comprised of craton and one or more mobile belts, sites of orogenic activity. During transgressions, shallow epeiric seas were common feature on cratons. Mostly flat lying but where gently folded, formed low islands and supplied sediment to epeiric seas. Collision closed norther iapetus ocean - caledonian orogeny. Southern iapetus ocean narrowed between laurasia and gondwana. Mountain building continued along eastern margin of laurasia forming acadian orogeny. Erosion of highlands produced extensive redbeds (caledonian - old red sandstone; Carboniferous (rest of the world) (divided into 2 periods in north america: mississippian and. Gondwana moved over south pole, resulting in extensive continental glaciation. Resulting sea level change influenced sedimentation on cratons. Gondwana continued moving north, rotating clockwise, and collided with laurasia during. Carboniferous into earliest permian (the last period in the paleozoic)
