OUTER MORAINE OF THE MIAMI LOBE. 319 



pebbly clay. This well is scarcely one-fourth mile south of the bluff or 

 upland north of the valley, in which rock rises 100 feet or more above the 

 level of the well mouth. A small gravel knoll directly across the highwaA- 

 from Federlee's residence has been opened and shows calcareous sand and 

 gravel containing many limestone ])ebbles in arching beds. A mile or more 

 east of this place the Panhandle Railway makes a slight cutting, in which are 



exposed — 



Railway cutting in Mill Creek Yallea/. 



Feet. 

 Yellow till 6-8 



Horizontally bedded yellow sand 5-6 



Blue sandy till at base. 



Such knolls are rare and much of the valley is very level, but these few 

 knolls, taken in connection with the well sections, indicate that there is 

 very little true alluvitxm in the valley, and that here, as well as farther 

 south in the moraine, the filling is of glacial origin. The deposits are cer- 

 tainly not fluvial. 



At a blacksmith shop in Port Union a well 36 feet deep gave the 

 following section: 



Section of well at a ilacksmith sho]) in Port Union, Ohio. 



Feet. 



Yellow pebbly clay ■ 12 



Blue clay 16 



Biue-gray sand, caving badly 2-3 



Hard, blue, pebbly clay , 7-8 



Sand and water at bottom. 



In Rialto, at a paper mill beside the canal, only a few rods from the 

 west bluff of Mill Creek Valley, a well over 100 feet deep and several 

 others 90 feet deep did not reach the bottom of the drift. In all of these 

 wells the greater part of the drift is reported to be blue clay, the sand and 

 gravel being interstratified in thin beds. Stones were frequently encoun- 

 tered, making it difficult to drive the wells. In one well they were so 

 numerous at a depth of 90 feet that the boring was abandoned. North 

 of the Rialto station, a few rods east of this paper mill and farther from the 

 bluff", is a cutting 10 feet in depth, which exposes yellow till with blue till 

 at the base. The upper portion of the till, to a depth of 2^ to 3 feet, 

 contains fewer pebbles than that in the lower portion of the exposure. In 

 the till are many small blocks of limestone, such as find outcrop on the 

 borders of the valley, and these are but little waterworn, while many are 

 striated. 



