448 H. L. FAIRCHILD — GLACIAL GENESEE LAKES. 



The larger local lake in the main Van Campeiis creek valley, with 

 which the Wirt Center lake soon united, and which Avill he called tlie 

 Friendsliip lake, had its outlet hy the west branch of the creek and the 

 drainage was by Champlain and Oil creeks past Cuba. This is a w^ell 

 defined scourway in drift. The divide is smooth, not swampy and 

 about 600 feet wide. The Erie railroad traverses this pass, wdiicli has 

 an altitude of 1,692 feet. 



Numerous plateaus and terraces are seen in this valley at different 

 heights. Theoretically there are three sets of water-levels in this valley ; 

 the local Friendship lake levels, which should be about 1,700 to 1,710 feet 

 altitude ; the third stage levels of the Genesee water (Stone Dam outlet) 

 about 1,610 to 1,630 feet, and the fourth stage levels (Cuba outlet) about 

 1,510 to 1,530 feet. 



Blach Creek lake. — This lake was the early local lake in tlie valley of 

 Black creek, with outlet past Cuba, which later was part of the fourth 

 stage waters. 



Rushjord lake. — From the little that is known of the upper Caneadea 

 valley by observation and re})ort, it seems likely that a local glacial 

 lake existed in the upper part of the valley. The outlet is probably 

 to be found upon some highAvay leading southward from Rushford to 

 Cuba. A morainal lake (described on page 451) subsequently existed 

 here. 



Warsaw lake. — Tbe upper part of the Oatka (Allen) Creek valle}' must 

 have been filled with glacial waters overflowing for a time probal)ly 

 by Wolf creek into the fifth and sixth stage waters of the Genesee. The 

 phenomena have not been studied. With tlie retreat of the ice-dam this 

 local lake blended with the seventh stage of the Genesee waters. 



Dansville lake. — This lake has been sufiiciently described above as cor- 

 responding in outlet and level with the sixth stage of the Genesee waters. 

 The details have been given in a former i)aper,* to which the only 

 amendment now required is that the elevations of terraces should all, 

 with two exceptions, be raised 32 feet on account of correction of datum. 

 The exceptions are the Summit terrace west of Ston}' Brook station, 

 which is 1,262 feet, and the Culbertson Glen terrace, which remains 

 853 feet. 



Scottsburg lake. — It now seems quite certain that the Conesus Lake 

 valley could never have had an independent level, but nuist have been, 

 on account of the low pass (907 feet) w^est of Scottsburg, a part of the 

 sixth and seventh stages of the Genesee waters. Subsequentl}^ the valley 

 was held possession of by the Warren waters from the north. 



* Vol. 6, this Bulletin, pp. H58-3C0. 



