332 



GEOLOGY OF OHIO. 



inserted in an excavation penetrating to the gravel, or to the water of a 

 subterranean lake.* 



The same ijhenomenon of gravel closely underlying the surface of a 

 flat country occurs on the south side of the moraine ridge in Union town- 

 ship. There the "Darby plains," which constitute a fertile and fine 

 agricultural tract, are based on a gravelly subsoil. 



Wells and Springs. — The following observations on the common wells 

 of the county are of interest. They give some idea of the accessibility 

 of water for domestic purposes, and of the composition of the Drift, as 

 well as of its thickness at various places : 



* This circumstance would not be mentioned had it not been frequently reported 

 by others in reference to certain wells in Defiance and Fulton counties. The facts are 

 given -with great circumstantiality and positiveness, and can not safely be denied. 



