GLACIAL WATERS IN CENTRAL NEW YORK '1 5 



partly as a cut bank, until it blends with the broad Victor channel, 

 described in the next chapter. The lower channel, Rush-Mendon 

 [pi. 13] terminates near Mendon village in a delta, somewhat eroded 

 by recent Streamwork, tying between Mendon and Fishers, with an 

 altitude of 600 to 580 feet. This delta lies at the present head of 

 the Irondequoit valley, and the glacial waters, which we may call 

 the Fishers lake, had eastward escape through the Victor channel. 

 One puzzling feature in this district is a coarse, cobbly gravel 

 deposit ij miles northwest of Honeoye Falls and east of Sibley- 

 ville corners. The Hemlock branch of the Lehigh Valley Railroad 

 has extensively excavated the deposit and revealed a delta struc- 

 ture indicating river flow toward the north or northeast [see pi. 14]. 

 This direction is consonant with the preserved glacial channels, 

 but in other respects the deposit does not clearly correlate with the 

 supposed river flow. Modern drainage, specially Honeoye creek, 

 has considerably changed the topography as it was left by the 

 glacial streams, and it is possible that the delta represents an early 

 and nigher stream flow at that point. Perhaps it represents, work 

 of an earlier ice border drainage during the invasion by the glacier. 



Irondequoit valley to the Cayuga depression 



Higher series: Victor to Phelps 



The glacial drainage across this stretch of 23 miles [see pi. 3] 

 although somewhat broken and varied must be studied as a unit. 

 To the continuity of the lower channels there is only one decided 

 interruption, the break at Manchester. 



The Lehigh Valley Railroad follows this drainage tract through its 

 whole extent, and the Auburn branch of the New York Central 

 Railroad also, except between Victor and Shortsville. 



The highest channel that has been located in this series is. quite 

 separated from the others. Plate 3 shows it lying south of Paddle- 

 ford station and passing east of north to the narrow and poorly 

 defined valley of the Canandaigua outlet, which it intersects less 

 than a mile south of Shortsville. This small but definite channel 

 declines from 740 down to 620 feet. East of the modern Canan- 

 daigua outlet and southeast and east of Shortsville there are several 

 scourways and stream banks, from near 700 feet down to 620 feet, 

 which carried the eastward escape of the Canandaigua valley 

 waters, the flow passing immediately south of Clifton Springs. 



All the northern edge of the Onondaga limestone in the stretch 



