U.S. GEOLOGICAL SURVEY. 



MONOGRAPH iX . -PLAT 



IQ 



.^.! 



\ 



11 



12 



23 



16 • 



15 



18 



19 



14 



13 



I.A.D. and RP.W. del 



BRACH I OPODA 



(cretaceous and ^ 



- RY.^, 



T Sinclair * Soil Hi-ia 



