APPENDIX. 



Generalized Section for Indiana — Continued. 



557 



Names of Formations. 



Thickness 

 in Feet. 



Characteristics. 





Hudson River for- 

 mation. 



260-860 



Limestones, clays, and shales. 



03 



Utica shale. 



0-300 





1 1 



7! 



Galena and Trenton 

 limestone. 



486-525 





o 



St. Peters sandstone. 



150-224 







Lower Magnesian 

 limestone. 



50 + 







■ f Potsdam sand- 

 { stone. 

 [ Base not exposed. 



1000 ± 





