GSC 111 Lecture Notes - Lecture 17: Alleghanian Orogeny, Taconic Orogeny, Acadian Orogeny

• School: University of Miami
• Department: Geological Sciences
• Course: GSC 111
• Professor: James Klaus

Document Summary

Create fault block basins- form bodies of water. Form ocean crust between n. america an africa. Collision with baltica (north) and avalonia (south) Basins periodically flooded with marine waters form evaporite deposits. Formation of passive continental margin (present day) Fault block basins and evaporites of eastern north america. 6 km of nonmarine sediment accumulating in subsiding basins. Thick accumulations of sediment in the newark supergroup. Basaltic dikes and sills often associated with faulting of basin. Formation of the newark basin and palisades sill. Palisades sill exposed in hudson river across from nyc. Periodic flooding of marine water- evaporates away. Jurassic salt formation in the gulf of mexico. Formed from periodic flooding and evaporation of marine water. Low density salt rise up as overlying sediments accumulate on top. Series of accreted island arcs and microcontinents. Sonoma orogeny- accretes sonomia microcontinent to w. north america. Andean subduction zone (from alaska to chile)