676 GLACIAL FORMATIONS OF ERIE AND OHIO BASINS. 



feet deep in much of the portion west of Cattaraugus Creek, while in the 

 portion east a depth of 200 feet or more would be required simply to 

 carry the water southward to the creek. The conditions were far more 

 favorable for westward discharge from Cattaraugus Creek along the face of 

 the escarpment than across these passes, and there is not wanting evidence 

 of such a discharge. As to the drainage of the region that lies north of 

 Cattaraugus Creek less has been determined. It is not known whether the 

 waters were ponded sufficiently to throw the di'ainage into Cattaraugus 

 Creek or had lower lines of discharge along or beneath the ice margin. 



Strong indications of a westward discharge from the western part of 

 the moraine are found on the slope of the northward projecting part of the 

 escarpment east of Forestville. A well-defined channel or scourway leads 

 across from Silver Creek to Walnut Creek, and is utilized by the Erie 

 Railway for a couple of miles about midway between Smith ]\Iills and 

 Forestville, as indicated in PL XIX. It stands between the 920- and 940- 

 foot contours, and is therefore 80 feet or more above the level of the Belmore 

 beach. It harmonizes well, however, with a delta on Walnut Creek at tlie 

 village of Forestville, which stands between 900 and 920 feet. There are 

 some indications of stream action along the base of the escarpment for 3 or 

 4 miles west of Walnut Creek, which seem referable to glacial drainage, 

 while the ice margin occupied the district immediately north of the escarp- 

 ment. The level of Lake Wliittlesey was probably reached within a few 

 miles west of Walnut Creek. These channels are now (season of 1900) 

 under investigation by Fairchild. 



Between Smith Mills and Cattaraugus Creek the writer noted short 

 sections of an east-west channel and also shelves or terraces leading across 

 divides between streams that now discharge northward; but the full 

 relations of these channels and terraces to the glacial di-ainage were not 

 determined. 



The writer also noted what appears to have been a line of glacial 

 drainage across the projecting part of the escarpment near Smith Mills at a 

 still higher level than the channel above noted, there being a conspicuous 

 terrace at and west of the railway station at about 1,000 feet. This terrace 

 may be mainly a rock shelf whose origin is independent of the glacial 

 drainage, but its smoothness suggests the action of a current It contrasts 

 strikingly with the in-egular surface of the slope above this level. 



