LEGEND 

 OCEANIC BASINS 

 MARINE WATERS (EPICONTINENTAL) 

 SEA OR LAND. MORE LIKELY SEA 

 LAND OR SEA. MORE LIKELY LAND 

 LANDS 

 INDETERMINATE AREAS 



POLAR 

 EQUATORIAL 



MARINE CURRENTS 



Fig. 30 

 Paleogeographic map of North America during late Middle and Upper (late) 

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

 Journal of Geology.) 



