BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Vol. 2, pp. 277-292, PLS. 9, 10 



STRATICxRAPHY OF THE CARBONIFEROUS IN CENTRAL 



IOWA 



BY 



CHARLES R. KEYES 



C OCT 15 ,it^^ 



*%, 



'•<''• 



ROCHESTER 

 PUBLISHED BY THE SOCIETY 



March, 1891 



