COKKELATIVES OF BLOOMINGION MOEAINIC SYSTEM. 99 



Section of Emert well, ^^ miles north of Jamestown. 



Feet. 



Soil 2 



Clay, yellow, and sand 28 



Quicksand 1 J 



Clay, blue 29 



Muck, black; leaves, twigs and branches of trees : 3 



Sand and clay 12 



Shale, siliceous, ' ' soapstone " 160 



235J 

 • Section of gas well 3 miles southeast of Elizaville. 



Feet. 



Soil and yellow clay 18 



Quicksand 3 



Clay, blue 20 



Sand, white (gas) 11 



Clay, blue 6 



Swamp muck, leaves, twigs, etc 7 



Clay, blue 19 



84 

 Section of Vandeveer well, 6 miles south of Lebanon . 



Feet. 



Soil 2 



Clay, yellow 18 



Clay, blue 45 



Swamp muck, leaves, twigs, etc 10 



Clay, blue 25 



Sandstone 9 



109 

 There are indications that in parts of central Indiana scarcely 20 feet of drift were deposited 

 during the Wisconsin invasion. In western Tipton and southern Clinton counties a buried 

 soil about 20 feet below the surface seems to represent the land surface previous to the Wis- 

 consin invasion. In southern Madison County a black mucky soil, carrying pieces of wood 

 large enough to be called logs, underlies the till at 15 to 40 feet. 



Many deep borings made in the search for natural gas disclose the great thickness of the 

 drift and the position of the preglacial valleys. The records of some of these borings are suf- 

 ficiently definite to bring out the contrast between the soft, easily penetrated Wisconsin drift 

 and the hard, partly cemented, underlying supposed Illinoian or pre- Wisconsin drift. As no 

 natural exposures reach the pre- Wisconsin drift information concerning it is obtainable only 

 from these borings. The writer, however, examined a set of samples of drift taken from a 

 gas boring at Lebanon which was of much service in interpreting records in the neighboring 

 districts, and he has little doubt that the change from soft to hard till marks the passage from 

 Wisconsin to pre- Wisconsin drift. 



Section of drift in Lebanon, Jnd., gas well. 



Feet. 



Soil, black 2 



Till, yellow (Wisconsin) 9 



Till, blue, becoming gray toward bottom 15 



Sand with water 1} 



Till, ash-colored, soft and sticky (probably Wisconsin) 77 



Gravel 8 



Till, pale, ash-colored, hard and dry (probably Illinoian) 53 



Till, dark ash or gray, with some sand interbedded (probably Illinoian, if not older) 176 



342J 



The following section of a well on Washington Street in Lebanon, as reported by Gorby 

 and Lee, 1 shows how complex the bedding in the Wisconsin drift may be. It appears not to 

 have reached the pre- Wisconsin. 



Fifteenth Ann. Rept. Indiana Dept. Geology and Nat. Hist., 1SS6, pp. 170. 



