334 GEOLOGIC TIME. 



The region to the south, indicated by No. 5, is supposed to have been 

 covered by the southward extension of the Appalachian, Mississippian, 

 and Cordilleran seas. It is r;OW covered by deposits of Mesozoic and 

 Cenozoic age. 



A more detailed description of the map can be gained from the sec- 

 tion 07i the growth of the (continent and on the geographic conditions 

 accompanying the different depositions of Paleozoic sediments in the 

 Cordilleran sea. 



