658 THE ILLINOIS GLACIAL LOBE. 



no good supply had been obtained though sunk to a depth of 1,200 feet. 

 Near this village, at Mr. Eden's, a well 168 feet in depth penetrates — 



Section of Eden well near Danforth, Illinois. 



Feet. 



Soft till 70 



Hard till 60 



Shale 38 



It obtains water in limestone at bottom. A neighboring well obtains 

 water at 72 feet, in sand below a soft till. Wood was found just above the 

 water vein. 



At La Hogue several flowing wells have been obtained from the drift 

 at depths of 70 or 80 feet. They are mainly through soft blue till. 

 Flowing wells are found at a similar depth at Ridgeville and in the interval 

 between these two villages. Occasionally a well only 40 or 45 feet in depth 

 has sufficient head to nearly reach the surface. 



At Gilman flowing wells are obtained from the drift at depths of 75 to 

 150 feet. It is designed to use such wells for a public water supply. 

 Occasionally wells are sunk to the underlying rock, which is reached at 

 190 or 200 feet. The shallow wells in Oilman are obtained at 12 to 16 feet. 



At Onarga several wells have been sunk to a depth of 90 to 160 feet 

 from which water rises within 10 or 15 feet of the surface, or to about 660 

 feet above tide. The public supply is from three wells of this class. 1 In 

 a portion of this village there is surface sand to a depth of 12 to 18 feet, 

 at the bottom of which wells are often obtained. The following three bor- 

 ings are reported in the geology of Illinois. A coal boring near Onarga is 

 thought to have reached a depth of 400 feet without encountering rock, 

 though it terminated at an elevation but 260 feet above tide, or about the 

 level of the Mississippi River at Cairo. The reliability of this record 

 appears questionable, it being given from memory some years after the 

 boring was made. A boring between Onarga and Oilman is reported to 

 have reached rock, thought to be Lockport (Niagara) limestone, at 268 feet, 

 the drift section being- as follows: 



Seetion of a boring between Onarga and Gilman, Illinois. 



Feet. 



Blue and red clay 98 



Sand and soft sediment 140 



Hardpan 10 



Hard stony clay 20 



Total 268 



1 Manual of American Waterworks, 1897. 



