LEGEND 



oceanic basins 



marine waters (epicontinental) 

 sea or land. more likely sea 

 land or sea, more likely land fr^t. 

 Elands 

 indeterminate areas 



POLAR 

 EQUATOR'AL 



MARINE CURRENTS 



Fig. 29 

 Paleogeographic map of North America during Lower (early) Cambrian 

 time. (Slightly modified after Bailey Willis, courtesy of The Journal of 

 Geology.) 



