656 GLACIAL FORMATIONS OF ERIE AND OHIO BASINS. 



main Cattavaugus Creek. From that point a weak outer belt makes a 

 detour southward in crossing the old valley of South Cattaraugus Creek 

 and returns northward along the east side of the valley to the main Catta- 

 raugus Creek. 



A stronger belt sets in on the north side of Cattaraugus Creek opposite 

 the old valley and thence leads northeastward along the divide between 

 northern tributaries of Cattaraugus Creek and streams which flow directly 

 toward Lake Erie. Indeed the moraine to a large degree constitutes the 

 divide from this point up to the head of Cattaraugus Creek, in western 

 Wyoming County. 



At the head of Cattaraugus Creek there is a reentrant between the 

 lobe that extended westward into the Lake Erie Basin and one that extended 

 southward up the Genesee. Between these lobes an interlobate moraine 

 was formed which occupies the high divide west of the Genesee and extends 

 northward from Wethersfield and Java townships in southwestern Wyoming 

 County to Bennington Township in the northwest corner of the countv, a 

 distance of about 15 miles. 



From the east side of this interlobate moraine a strong moraine leads 

 southeastward to the Genesee River, having a width of 6 or 8 miles in 

 Wethersfield, Gainesville, Pike, Castile, and Genesee Falls townships, 

 Wyoming County, and coming to the river in the vicinity of Portage Falls. 

 The writer has not traced its course beyond the Genesee, but it is supposed 

 to be continued around the southern ends of the Finger lakes of western 

 New York. 



For a short distance outside the ridged and hummocky part of this 

 morainic system in eastern Erie County, Pa., and in Chautauqua County, 

 N. Y., there are often large numbers of bowlders, which it is thought may 

 have been deposited by the ice sheet at about the time the moraine was 

 forming, the moraine being a submarg'inal and the bowlders a strictly 

 marginal deposit. The bowlders are very conspicuous just outside some of 

 the reentrants in the moraine, suggesting that the ice border ma}' have 

 passed more directly over the ridges which stand in these reentrants than 

 the border of the morainic ridges would indicate, and also have reached an 

 altitude somewhat higher. The bowlders are, however, conspicuous only 

 for a mile or so beyond the morainic ridges, and to altitudes 100 to 150 

 feet above them. 



