622 GLACIAL FORMATIONS OF ERIE AND OHIO BASINS. 



Between Cussewago and French Creek valleys drift knolls occur, both 

 isolated and in g-roups, but not forming well-defined belts. In French 

 Creek Valley drift knolls set in near Saegerstown and occupy it as far as the 

 bend west of Cambridge, a distance of 7 or 8 miles. These probably 

 represent only the outer member, for French Creek has here a northeast-to- 

 southwest course corresponding with the general direction of the ice margin- 

 The inner member is apparently represented on Conneautee Creek, a few 

 miles north of Cambridge, near McLaue, and on Le Boeuf Creek at Water- 

 ford, there being strongly morainic topography in the valleys at these 

 villages, and a well-detined moraine-headed terrace at Waterford. The two 

 members of this morainic belt are more distinctly outlined east from here 

 than they are to the west, and are accordingly traced separately. 



The outer member follows the southeast side of F'rench Creek from 

 Cambridge to Le Boeuf and then passes up East French Creek and rises 

 to the uplands. It passes 2 or 3 miles north of Beaver Dam, and enters 

 New York at the extreme southwest corner of the State. In New York it 

 has a northeastward course for several miles, crossing the Western New York 

 and Pennsylvania Railway north of Panama station, and rising onto the 

 uplands between the head of French Creek and Lake Chautauqua, where 

 it attains an altitude about 1,800 feet above tide. The moraine is not well 

 developed on the slope toward Lake Chautauqua, but seems to find its 

 continuation in a sharp cluster of knolls at Jamestown, N. Y., at the south- 

 east end of the lake. 



The inner member passes from Wateiford, Pa., northeast into New 

 York, crossing the valley of Lake Pleasant at and above the lake, and the 

 north branch of French Creek north of Lowville, Pa., and in western New 

 York it again crosses this creek near its head at Findley Lake. Fi'om the 

 north end of Findley Lake its course is slightly north of east past Sherman, 

 N. Y., to the narrows of Lake Chautauqua. 



There are occasional developments of morainic topography between 

 these two belts, so that in some of the valleys of Erie County, Pa., and 

 Chautauqua County, N. Y., they are nearly connected, but on the uplands 

 they are distinctly separate moraines. 



Some uncertainty is felt concerning the position of the ice margin for 

 a distance 30 miles east from Lake Chautauqua at the time the Cleveland 

 morainic belt was forming. It is a much more broken region than that 



