482 GLACIAL FORMATIONS OF ERIE AND OHIO BASINS. 



each and all indicate that it is of the class which Chamberlin has termed 

 a ''lodge moraine,"^ i. e., one formed from material carried in the basal 

 portion of the ice sheet and deposited submarginally, rather than one 

 formed at the actual extremity of the ice. If deposited at the margin it 

 would seem to have been overridden and subdued by the margin of the 

 ice sheet. 



The records of wells and natural exposures here given are taken up at 

 . the eastern end of the moraine and followed westward. 



In northern Logan County, from Big Springs westward nearly to the 

 Lewiston reservoir, there are numerous outcrops of limestone, but among 

 these outcrops are places filled deeply with drift, showing that the rock 

 surface is very uneven. In the village of Belle Center there are extensive 

 quarries, but one of the gas wells, scarcely one-fourth mile distant from 

 the quarries and on slightly lower ground, penetrated 160 feet of drift, the 

 greater part of the drift being till. Several flowing wells in and near this 

 village obtain water from the drift, their depth ranging from 18 to 25 feet. 

 The majority of them penetrate yellow till and then sand, each about 10 

 feet, after which they pass through a thin bed of blue hardpan, probably 

 till, beneath which water-bearing gravel is reached. Some of the wells 

 south of the village enter gravel at the surface instead of yellow till. 



At Hunts ville one of the gas wells penetrates 67 feet of drift, while 

 rock is quarried one-half mile north of the village on ground fully as high 

 as at the gas well. There are a few gravelly knolls in the vicinity of this 

 village, but the drift penetrated in the wells is almost entirely till. 



At Lake view, near the outlet of the Lewiston reservoir, Mr. Angel has 

 a well 112 feet deep which did not reach the rock. It passed through con- 

 siderable quicksand. South of this reservoir for several miles the moraine 

 contains many gravelly knolls, and the till which occurs is of a looser 

 texture than in portions of the moraine farther west. 



On a previous page attention was called to the great range in the 

 thickness of drift at De Graff, one gas well reaching rock at 33 feet, while 

 another one, a half mile north, penetrated 300 feet of drift before reaching 

 rock. The drift is largely sand and gravel. 



At Port Jefferson, in the Great Miami Valley, at a level but a few feet 

 above the river and nearly 100 feet below the bordering uplands, a gas 



'Bull. Geol. Soc. America, Vol. 1, 1890, p. 28. 



