rll4 NEW YORK STATE MUSEUM 



melting of the glacier would be impounded in the open portion 

 of the yallejs south of the ice front. Primarily these local glacial 

 lakes had their outlets across the divide at the head of each valley 

 into some course of southern drainage, and this disposal of the 

 surplus water® continued till the receding ice front uncovered 

 passes across the crests of the ridges which were lower than the 

 cols or outlets at the valley heads, and which led in a direction 

 permitting free and final escape of the overflow. 



The glacial lakes which occupied the Onondaga and Butternut 

 valleys have been described in the former writings.^ It was the 

 intention to examine during 1900 all the low passes or cols across 

 the divide at the heads of the several valleys east of Butternut 

 valley, and to study the history of the glacial waters held in the 

 valleys. This plan was not carried out except for the Limestone 

 valley and the Cazenovia valley, the latter lying eastward of and 

 connected with the former. The data relating to these valleys 

 and their glacial lakes will be presented here. 



In order to fully understand and appreciate the geologic fea- 

 tures to be described, the reader should have before him the Caze- 

 novia sheet of the New York state topographic map, on which 

 are located all the places and geographic features referred to in 

 the following description.^ 



Limestone and Cazenovia valleys 

 Divide and outlets. The line of water parting between north- 

 flowing and south-flowing waters passes south of Erieville, on the 

 east edge of the map. Running west southwest over the hills, it 

 crosses the New Woodstock valley on a moraine filling, 1| miles 

 north of Sheds Corners. It then passes west over the summits of 

 three high hills, and then makes a sharp turn to the south around 

 the Deruyter reservoir. The line then trends west of north over 

 Arab hill, and Stockham hill, and runs 3 miles farther north 

 around the head of the stream which flows into Carpenter pond. 



^Geol. see. Am. Bui. 10:57-64; Am. jour. sci. 7:251-54. 



^ Any published sheet of the New York topographic map may be 

 obtained by sending 5 cents to the director U. S. geological survey, Wash- 

 ington D. C. 



