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AN AMERICAN GEOLOGICAL RAILWAY GUIDE. (IXD.) 



Indiana. 



LIST OF THE GEOLOGICAL FORMATIONS FOUND IN INDIANA, 



* Four-fifths of the State of Indiana is covered with drift. It is 90 feet to the rock in Indian- 

 apolis. At some points north of Wabash Eiver the drift has been bored into 900 feet. It thins 

 out as you go toward Ohio River, does not reach it at some points, and is sparingly found south of 

 that stream. 



