476 GLACIAL FORMATIONS OF ERIE AND OHIO BASINS. 



midway between Piqua and Sidney. It follows the west blnff to the bend 

 of the river at Port Jefferson, 5 or 6 miles above Sidney, having- near Sid- 

 ney a slight development along the east bluff. About 2 miles northeast 

 of Port Jefferson, near Tileton post-office, it dies out in a plain, but is 

 thought to find its continuation in a moi'ainic belt a few miles to the east, 

 which leads from near De Graff northward along the east side of the Grreat 

 Miami to Lewiston, thence eastward along the south side of the Lewistoii 

 reservoir to the source of the Great Miami, in northern Logan County, where 

 it becomes associated with the Mississinawa moraine, and in connection with 

 that moraine passes into the Scioto Basin, the united belt forming the Powell 

 moraine of the Scioto lobe. 



From the State line at Union the moraine follows the north side oi 

 White River westward through Randolph County to Selma, in Delaware 

 County. It there becomes broken up into loosely aggregated knolls and 

 disconnected ridges, interrupted in places by plane tracts. Its limits are, 

 therefore, difficult to determine. The outermost chain of prominent ridges 

 leads from Selma northwestward to Royerton, beyond which no well-defined 

 continuation was found, the surface being plane both to the north and west. 

 An inner chain of ridg'es bears northwestward from near the Randolph- 

 Delaware county line along the south side of Campbells Creek, determining 

 to some extent the course of that stream. Its distance from the outer 

 chain is 2 to 4 miles. This inner chain connects somewhat closely near 

 Granville, Ind., with the Mississinawa moraine, though there is an interval 

 of about a mile in the vicinity of the Lake Erie and Western Railway, 

 where the surface is plane. In its northwestward continuation this belt is 

 either combined with or concealed by the bulk}' Mississinawa moraine — at 

 least no belt distinct from the Mississinawa was found. 



Outside tlie two chains of ridges just outlined there are occasional 

 developments of low knolls and short ridges along a line leading from 

 Muncie somewhat directly toward Peru, passing near Alexandria, Point 

 Isabel, Greentown, and Bunker Hill, connecting north of Peru with a bulky 

 interlobate moraine formed between the Maumee and Saginaw lobes, but it 

 is not certain that these undulatory tracts should be correlated with the 

 Union moraine. Indeed, it is questionable whether so feeble a develop- 

 ment of ridges and knolls merits classification as a moraine, though it may 

 represent a line held by the ice margin for a brief period. As a tentative 



