504 GLACIAL FOEMATIONS OF ERIE AND OHIO BASINS. 



There is a continuous gravel belt along Eel River above North 

 Manchester to its source in Allen County. Much of the gravel was probably 

 derived from the ice sheet at the time later moraines, which cross Eel River 

 near its head, were forming. 



The record of gas borings in the plane tracts which lie east of the 

 moraine in Dekalb County are here given. The surface portion of the 

 drift is probably contemporaneous with that of the moraine west of it, and 

 earlier than the surface portion of the drift along the St. Joseph River. 

 It is much to be regretted that accurate records of the various beds of diift 

 passed through were not preserved, since light might thus have been tlirown 

 upon the number of drift sheets here represented. As already remarked, 

 the thick drift here penetrated was probably deposited only in part at the 

 time the Mississinawa moraine was forming, much of it being considered 

 earlier than this moraine. 



At Garrett the drift has a thickness of 318 feet. There is 60 feet or 

 more of till at the surface, but below this fully two-thirds of the section is 

 reported to be sand and gravel. Just above the rock there was found a 

 clay of whitish color, in which no pebbles were observed. It was said to 

 have been soft when brought up, but became hardened upon exposure. 



At Auburn the drift in one of the gas wells has a thickness of 282 feet. 

 The upper half is mainly till, but in the lower half sand predominates. 



At Waterloo a reliable record was kept by the driller, as follows: 



Drift penetrated in gas horing at Waterloo, Ind. 



Feet. 



Yellow and blue till 40 



Sand and gravel with but little till 270 



Blue clay without ' ' grit " 4.5 



Gravel 10 



Total 365 



In a gas well in Butler the drift is 378 feet in thickness. The following- 

 section of the drift appears in Dryer's report : ^ 



Drift 2>enetrated in gas horing at £xt,tler, Ind. 



Feet. 



"Hardpan" (generally clay) 15 



Gravel and coarse sand 275 



Ked quicksand 40 



Clay (glacierite) 45 



Cobblestones and bowlders , 3 



Total - 378 



' Sixteenth Ann. Rept. Geol. Survey Indiana, p. 103. 



