620 GLACIAL FORMATIONS OF ERIE AND OHIO BASINS. 



northward, passing through Chester Crossroads to the East Chagrin River 

 in the southwest part of Chardou Township. It there swings eastward and 

 passes just north of the viUage of Chardon to Hampden Center, and thence 

 to the headwaters of the Cuyahoga River in northeastern Greauga County, 

 Ohio. 



The moraine then makes a detour to the south in crossing the Grand 

 River Basin. For about 10 miles from the head of the Cuyahoga the 

 cou.rse is southward along the divide between the Cuyahoga and Grand 

 rivers. It then swings to the southeast and constitutes a portion of the 

 divide between the Grand and Mahoning rivers, passing through Southing- 

 ton and Champion townships, Trumbull County, and coming to Mosquito 

 Creek 2 or 3 miles south of Cortland. It there turns abruptly northward 

 and crosses over the divide between Mosquito and Pymatuning creeks. It 

 first touches the Pymatuning Valley near the line of Trumbull and Ashta- 

 bula counties, and follows the western slope of that valley to the Ohio- 

 Erie divide, about 4 miles northwest of Andover, Ohio. The small glacial 

 tongue encircled by this loop extended but little outside the drainage basin 

 of Grand River. It has a width of about 15 miles at the south end, and 

 perhaps 25 miles at the north, whei'e it became confluent with the main 

 body of the ice sheet. 



From the Grand River Basin eastward there is a much more complex 

 morainic belt than to the west, and possibly more time was occupied in its 

 formation than in that of the Cleveland moraine. Between Pymatuning 

 Creek and the Ohio-Pennsylvania line there are three somewhat distinct 

 ridges or members, each from 1 to 2 miles wide. The southernmost 

 passes in an eastward course through West Williamsfield and Williamsfield 

 Center, and after crossing the State line enters the Shenango Valley near 

 the north edge of Jamestown, Pa. The middle member leaves Pymatuning 

 Creek 3 or 4 miles farther north than the southern one, and, bearing south of 

 east across southwestern Andover and northeastern Williamsfield townships, 

 becomes merged with the southern member just east of the State line. 

 The northern member passes from the head of Pymatuning Creek north of 

 east across Leon Township, entering Pennsylvania near Pennline, at the 

 northwest end of Pymatuning Swamp. 



No well-defined continuation of the southern and middle members was 

 found on the uplands east of the Shenango, between that stream and 



