830 



GEOLOGY 



Fig. 554. Map showing the distribution of the better-kmnvn parts of the 

 Pliocene system. The area of the Lafayette, along the Atlantic and ( lulf 

 coasts, is marked by vertical dashes. This formation is doubtless im>rv 

 wide-spread than the map shows, as indicated in the text. H-lai 

 little of the exposed Pliocene is marine. 



