BEACH PHENOMENA BETWEEN BATAVIA AND CALEDONIA. 277 



Across a brook and upon the south side of the highway the beach re- 

 appears in excellent form as a heavy gravel ridge beneath the residence 

 of Mr Abram Van Valkenburgh. For about a mile the ridge follows 

 along the south side of the highway, slightly diverging and giving loca- 

 tion for the residences upon that side of the road. 



Eastward from here the ground is lower and with long, drumlin ridges. 

 The shoreline is exceedingly crooked and the beach phenomena obscure 

 in the embayments, but usually pronounced at the north ends of the 

 ridges. The map (plate 30) will show approximately the location of the 

 observed shorelines and the distinct gravel ridges. At the crossing of the 

 north-and-south ("old Phelps") road the ridge bears the house of Mr 

 Patrick Conlon. 



Within three miles of Caledonia the shoreline is thrown rapidly south- 

 ward upon the west side of the Genesee Valley embayment. and has not 

 been traced farther than is shown upon the map. 



THE GENESEE EMBAYMENT. 



The Warren waters occupied the valley of the present Genesee river as 

 far south as Mount Morris. The accumulation of sand and silt either 

 side of the gorge (" High Banks ") west of the village doubtless represents 

 the delta deposits of the stream during the Warren episode, before the 

 gorge was excavated. The waters occupied the preglacial valley of the 

 river, now possessed by the Kishawa creek, as far as the village of Nunda, 

 and numerous terraces and plateaus in that valley are thought to repre- 

 sent the work of those static waters. The lower Canaseraga valley (Dans- 

 ville valley) was flooded to its head, some four miles south of Dansville. 

 About the head of this valley a succession of terraces indicate the levels 

 of the subsiding waters,* and some of the lower terraces will undoubtedly 

 correlate with the Warren beaches. 



The valley of Conesus lake was also occupied by the Warren waters, 

 which found access by the depression along the present outlet north of 

 the lake. 



The Warren waters in the Genesee embayment were several miles in 

 width and of considerable depth, and it is possible that with sufficient 

 search the shores may be located at various points, even as far south as 

 Dansville. 



FROM GEXESEO TO LIMA. 



The ground east and northeast of Geneseo is thrown into a series of 

 fairly strong drumlina over Hamilton shales. The ridges are generally 



* For a map of the Genesee valley and discussion of the lake history, see Bull. Geol. Soc. Am., 

 vol. 7, pp. 423-452 ; also vol. 6, pp. 35 8 ~36i- 



XU— Bull. Geol. Soc. Am., Vol. 8, 1896 



