678 GLACIAL FOEMATIONS OF ERIE AND OHIO BASINS. 



Hamburg to Buffalo Creek the moraine increases from less than a mile to 

 fully 3 miles in width. East from Buffalo Creek it becomes still wider, 

 and in eastern Marilla Township has two somewhat distinct members, one 

 of which passes south of WilHston, and the other north. The Hamburg- 

 moraine connects with the interlobate moraine of the Lake Escarpment 

 system in the northwestern part of Wyoming County. Its length from 

 Hamburg to the interlobate moraine is scarcely 25 miles, and if extended 

 westward to Lake Erie it would not much exceed 30 miles. 



RANGE IN ALTITUDE. 



The crest of the moraine at Ham'burg stands 825 feet above tide. It 

 rises to about 875 feet at Orchard Park, and to fully 1,000 feet between 

 Orchard Park and Cazenovia Creek. Between Cazenovia and Buffalo 

 creeks its outer border stands 925 to 950 feet above tide, but the highest 

 points in the midst of the moraine are probably above 1,000 feet. From 

 Buffalo Creek eastward the iimer border rises from about 950 feet to nearly 

 1,000 feet, and the northern, or inner, member has a crest reaching 1,000 

 feet near the meridian of Williston, and becoming still higher at its junction 

 with the interlobate moraine. The inner member reaches about 1,100 feet 

 on the meridian of Williston, and perhaps 1,200 feet at its junction with 

 the interlobate moraine. 



TOPOGRAPHY. 



The greater part of the moraine consists of sharp knolls 20 to 50 feet 

 in height, which, together with inclosed basins and winding sloughs, give 

 it very strong expression. The most inconspicuous part is the crest and 

 outer slope of the western portion, from near Orchard Park to Hamburg, 

 where only gentle swells 5 to 10 feet in height occur. The sharp knolls 

 are usually closely aggregated, but in Marilla Township the outer member 

 consists of scattered knolls of considerable prominence, among which are 

 nearly plane tracts which occupy more ground than the knolls. The inner 

 member, as far west as Marilla, has closely aggregated sharp knolls. But 

 from Marilla to East Elma there is a pitted gravel plain with basins 10 to 

 20 feet or more in depth, which often cover several acres each. The width 

 of this strip is a mile or more, and its length about 3 miles. It stands very 

 near the level of the Belmore beach, and was apparently formed in the 

 water. 



