654 GLACIAL FORMATIONS OF ERIE AND OHIO BASINS. 



appears which is somewhat distinct from the Ashtabula moraine. It Hes 

 mainly north of the Girard and Lexington wagon road and occupies a 

 Avidth of scarcel)^ one-half mile. On the outer (south) border there is a 

 narrow gravel plain that appears to be an outwash from the moraine. 

 This was at first thought to be a probable continuation of the Girard 

 moraine, but an inspection of PI. XVIII will make clear that it fits in 

 better with the Ashtabula moraine. From Girard eastward to Swanville 

 the Girard moraine consists of a narrow, nearl)- continuous till ridge, 

 having only a few knolls associated with it. It lies north of the Girard 

 and Erie wagon road most of the way to Fairview and south of that 

 road from Fairview to Walnut Creek Valley, opposite Swanville. Upon 

 crossing Walnut Creek it becomes much stronger and remains conspicuous 

 to its junction with the morainic belt outside of it near West Mill Creek 

 station. 



From the vicinity of Erie, Pa., eastward to the north end of Lake Chau- 

 tauqua, in New York, there is a single prominent moraine 1 to 3 miles in 

 width. It follows the north side of Wahuit Creek about to the meridian of 

 Erie, and there crosses Mill Creek and follows its north side past Belle 

 Valley, its inner border extending down to the south edge of the city of 

 Erie. It crosses Sixmile Creek south of the village of Harbourcreek, and 

 Sixteenmile Creek just below (west of) Grahamville. It enters New York 

 at the bend of Twentymile Creek and follows the north side of the west- 

 flowing portion of that creek across Ripley Township to its source in 

 western Westfield Township, Chautauqua County, N. Y. It comes to 

 Chautauqua Creek 3 miles south of Westfield, and nearly opposite the 

 mouth of Little Chautauqua Creek. Throughout much of the distance 

 from Erie to Westfield its inner border is within 1 to 2 miles south of the 

 railway lines, and for a short distance between Northeast, Pa., and the New 

 York line it extends slightly north of the railways. The inner border is 

 on the whole less definite and regular than the outer, and knolls and ridges 

 occur sparingly for a mile or two north of the main belt. An instance is 

 found at Northeast, Pa., where there is a series of knolls and short ridges 10 

 to 20 feet high, standing nearly 2 miles north of the main moraine. These 

 and other similar short ridges along the inner border of the main belt seem 

 scarcely prominent enough to merit separate name and description. 



The course of this morainic system from Lake Chautauqua to Cat- 



