UNION MORAINE. 485 



Near Winchester the majol-ity of the wells penetrate from 80 to 150 

 feet of drift, but two wells 1^ miles west of the city penetrated 332 and 383 

 feet, the first rock struck being shale (probably of Hudson River group). 

 The drift is mainly quicksand, though some till was passed through. 



In Farmland two wells, situated near the crest of the moraine, nave 

 each about 60 feet of drift, which consists of till, except a thin bed of gravel 

 just above the rock. 



A gas well at Selma penetrates the following drift beds: 



Drift in gas boring at Selma, Ind. 



Feet. 



Yellow till 12 



Sand 8 



Blue till containing streaks of brown sand 12 



Sand containing a few pebbles 20 



Fine gravel 25 



Coarse and fine gravel in alternate beds 10 



Total 90 



The double chain of ridges previously described as leading northwest- 

 ward from the eastern part of Delaware County into more or less close 

 connection with the Mississinawa moraine is, so far as can be learned from 

 exposures and borings, composed mainly of till. 



Along White River near Muncie there are outcrops of limestone, and 

 several of the gas wells in the eastern part of the city penetrate very little 

 di'ift. Others on ground not more than 25 feet higher penetrate about 100 

 feet of drift. The thickness of the drift increases more rapidly toward the 

 southwest from the outcrops of rock and therefore has no relation to the 

 moraine under discussion. 



There is a large gravel knoll and several small ones in the southwest 

 part of the city of Muncie. It is not certain that they should be included 

 in the Union morainic belt, since they lie slightly outside the line of the 

 moraine, but a brief description of an exposure in one of them is here 

 given. The largest knoll has been opened from top to bottom, and the exca- 

 vation extends to the center or highest part. There is exposed a nucleus of 

 till rising 20 feet or more above its base, around and over which the assorted 

 material is deposited. The latter is very unevenly bedded, and in almost 

 any vertical section several abrupt changes in the dip may be found. It is 

 mainly a fine gravel composed largely of limestone pebbles, but on the 

 western slope much sand occurs. This knoll rises about 40 feet above the 



