80 NEW YORK STATE MUSEUM 



Stage io. Avon lake. Outlets were at Honeoye Falls, Rush and 

 Mendon, at 700 down to 580 feet, eastward to the Mohawk-Hudson. 



Following the Vanuxem stage the ice at Syracuse receded so a 

 to allow free river-flow through the site of that city and there wa 

 no extensive lake then held in central New York. But in the 

 Genesee Valley the ice lay so far to the south that a local lake was 

 held in the valley with its levels determined by the outlets noted 

 above. The highest of these channels lies 2 miles west of Honeoye 

 Falls and the lowest is the excellent abandoned channel followed by 

 the Lehigh Valley Railroad through Rush to Mendon, at 580 feet 

 This Avon lake flooded the Dansville valley. 



Stage 11. Second Lake Vanuxem. The relationship of phe- 

 nomena in the Genesee and Batavia region theoretically requires a 

 readvance of the ice at Syracuse and the restoration of the glacial 

 Lake Vanuxem. 1 



It is not determined to what height the second Vanuxem rose, 

 but it may have reached an altitude approaching 840 feet on the 

 Mount Morris parallel. While this water lay over the Genesee 

 region the ice backed away from the Batavia salient sufficient to 

 allow Lake Warren to spread in from the west, and we hav 

 stage 12. 



Stage 12. Lake Warren. Outlet was across the State of Michi- 

 gan into the glacial lake Chicago and out to the Mississippi. Alt] 

 tudes of the Warren beaches are generally about 880 feet in central 

 New York, but on the Mount Morris parallel the plane is about 

 840 feet. 



Stage 13. Lake Dana. Outlet was eastward toward the 

 Mohawk-Hudson, at elevation about 700 feet, or about 660 feet on 

 the Mount Morris parallel. 



Lake Dana was only the longest of the pauses in the lowering of 

 the Warren waters toward the Iroquois level. It is one phase of the 

 Hyper-Iroquois waters. 



The filling of the Genesee valley from Dansville to Scottsville 

 with lake silts and smoothing them to the present form has been 

 a process in activity since the sixth stage, and is now carried on by 

 the present streams. 



1 The discussion of the glacial lake history of central New York and description of 

 the drainage channels and lake phenomena will be found in a forthcoming bulletin of 

 the State Museum. 





