LEGEND 



Tertiary 



Cretaceous 



Enid 



Un identified 



Carboniferous 



Igneous and older 

 Paleozoic 



The use of the same shade 

 in New Mexico and Kansas for 

 the unidentified beds does 

 not mean that they are of 

 the same age. 



Compiled from various soui 



Affosnt U'I.u/>. B.ii!imm, Md,. 



