F. Carney — Wave-cut Terraces in Keuka Valley. 335 



the lower contours in the Seneca and Cayuga valleys by ice- 

 erosion. 



Summary. 



The cliffs described in this paper are the product of wave- 

 work since they show no connection with such variation in 

 stratigraphical structure as often produce benches, and since 

 it has been found impossible to account for them in any other 

 manner ; furthermore, the presence of a cliff-cutting body of 

 water is attested indirectly by other phases in the drainage and 

 ice-erosion history of the region. That these shore lines are 

 older than the recession stage of the Wisconsin (Late) ice 

 sheet, follows from their being overlain by intersecting bands 

 of Wisconsin drift. 



