JD. F. Lincoln — Glacial Erosion of New York. 109 



which valley the lake occupies the northern 36 miles, and the 

 terminal moraine with its dependent deposits occupies the 

 remaining 22 miles. 



NORTH' 



L.O 



L 



a ^* 



L 5 



vr 









^\- 



S- Uj 



S 1 1 § 



^ * < s: 



..i 





!"3 





TIDE LEVEL 





Q3 



-4-9Z 



-177 



ft 



Em. 1. Section from Lake Ontario southward through Seneca Lake to 

 Elmira. LO, Lake Ontario, bottom 492 below tide level; L, Lyons, 407 above 

 tide level ; G, Geneva; 0, Ovid, 1061; LS, Seneca Lake, surface 441, bottom 

 — 177; H, Hector (summit) 1S05; B. Burdette ; N, Newfield, 2095; D, Odessa; 

 W, Watkins; V, Havana; M, Moraine; P, Pine Valley ; E, Elmira, 863. 



The greatest depth of the valley is at and to the south of 

 the middle of the lake, where the bottom lies 150-176 feet 

 below tide. At the north end, the lake comes to an abrupt 

 end, choked with drift and alluvium ; the valley also disap- 

 pears to the eye and is not traceable farther north. The 

 apparent depth of the lake at this part is 40 feet ; its true 

 depth is probably not much in excess of 200 feet, as may be 

 inferred from the section (fig. 2) in which the borings are 

 shown to represent two localities, distant 1700 feet in a line at 

 right angles with the channel, and near its probable axis. The 

 lake-level being 411 A. T., the buried channel would be at 

 241 A. T. 



r _ 



Eig. 2. Section across Seneca Lake at Geneva, from west to east, showing- 

 probable depth of buried channel. R, Reservoir; C, Castle Creek ; G, Geneva 

 Nat. Gas Spring Co. ; Ch, Chase's well ; S, Nester's well ; M, outcropping of 

 Marcellus shale. 



For the part of the valley lying south of the lake the fol- 

 lowing data have recently been obtained. At the mouth of 

 the "inlet" at Watkins, near the middle of the valley, a well 

 has been driven " by blows from a sledge " 224|- feet in the 

 alluvium. Four miles south, at Havana, a well was sunk at 

 Cook Academy, near the middle of the valley, which passed 

 through 435 feet of sand without reaching rock. Six miles 

 farther south (one mile beyond Millport) a well was sunk 



