428 C. SCHUCHERT PALEOGEOGRAPHY OF NORTH AMERICA 



Pago 



Ozarkic period or system 484 



Ozarkian transgression 484 



Shakopee emergence 485 



Canadic period or system 485 



Beekmantown transgression 485 



Saint Peter emergence 485 



Ordovicic period or system 486 



Trenton transgression 486 



Utica emergence 486 



Cincinnatic period or system 487 



Richmond transgression 487 



Taconic revolution 488 



Silurie period or system 489 



Niagaran transgression 489 



Cayugan emergence 491 



Devonic period or system 491 



Onondaga transgression 491 



Chemung emergence 492 



Mississippic period or system 494 



Fern Glen invasion 494 



Keokuk emergence 494 



Tennesseic period or system 495 



Saint Louis invasion 495 



Kaskaskia emergence 495 



Pennsylvanic-Perinic period or system 496 



Pottsville transgression 496 



Appalachian revolution 497 



Summary of emergences and transgressions 498 



Explanation of the table 498 



Regional movements 500 



Emergences 503 



Influence of earth shrinkage on the distribution of continental 



seas. By Joseph Barrell 506 



Transgressions 508 



Oceanic participation in the transgressions 510 



Oscillatory seas 511 



Oceanic level 512 



Description of the paleogeographic maps and classification of the Ameri- 

 can geologic formations into periods and eras 513 



Paleozoic and Neopaleozoic 513 



Paleozoic era 516 



Georgic period 516 



Acadic period 520 



Ozarkic or Cambric period 522 



Ordovicic period of authors 524 



Canadic period 526 



Ordovicic period 529 



Cincinnatic period 530 



