OUTER MORAINE OF THE MIAMI LOBE. 317 



moraine, which blends with tlie earthy deposit that caps the gravel plain, 

 but within one-half mile north from the gravel plain the moraine becomes 

 nearly free from silt. The main part of the grading is through ordinary 

 till, which appears to extend to the very border of the gravel plain and 

 down to the same level. A large percentage of the pebbles included in 

 the till are striated. There are but few Canadian rocks present, the majority 

 of pebbles being limestone from the western Ohio region. Knolls in this 

 valley contain some till, but are composed mainly of sand and gravel. 



In the moraine west of Kings Mills, on the Little Miami bluff, a well at 

 Mr. Hill's residence has a depth of 60 feet. It is mainly throiigh gravel, an 

 exceptional structure for the upland drift. At Pisgah, in southeastern Butler 

 Count}^, which is probably tlie most elevated point in this part of the count}^, 

 the drift has a thickness of 75 feet or more. A buried soil was struck in the 

 schoolhouse well at this village below blue till at a depth of 45 feet. This 

 probably separates the Wisconsin from earlier deposits of di-ift. A well a 

 short distance east of the village, on land owned by Mrs. Webb, was sunk to 

 a depth of 75 feet without reaching rock. It was thought by citizens of 

 Pisgah that this also struck a black soil, but no witnesses to the fact were 

 interrogated. The information concerning the well at the schoolhouse was 

 given by Mr. Milton Thompson, a farmer living near Miltomson station, 

 who was present when the ^oil was struck. He described it as bla,ck and 

 containing bits of wood. On Thompson's farm the wells are about 40 feet 

 deep, and do not reach rock. The strata penetrated are as follows: 



Section of wells on M. Thompso^i' s farm, near Pisgah, Ohio. 



Feet. 



Soil and yellow pebbly clay (till) 10-15 



Blue till, not very hard --. _ 20-30 



Sand bed containing water. 



On the east bluff of Mill Creek, east of Sharonville, J. P. T. Miller's 

 well penetrated about 40 feet of cemented gravel, and there are outcrops of 

 cemented gravel in the ravines in that vicinity. It is not improbable that 

 this may belong to the earlier drift sheet, though located in the moraine, 

 since in that vicinity the moraine appears to consist of but a thin sheet 

 of drift. 



Records of several deep borings along Mill Creek Valley — that is, the 

 old valley of the Ohio River — are introduced here. Some of these belong 

 to the tract lying north of this moraine. They serve to show how greatly 



