BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



VOL. 15, PP. 449-460, PLS. 37-41 SEPTEMBER 15, 1904 



FINGER LAKE REGION OF WESTERN NEW YORK 



BY CHARLES REDWAY DRYER 



{Read before the Society January 1, 1904-) 



CONTENTS 



Page 



Location and general description 449 



Valleys and ridges 450 



Canandaigua valley 451 



Canaseraga valley 451 



Cohocton- Way land valley 45 1 



Conesus valley 452 



Hemlock valley 452 



Canadice valley , , 453 



Honeoye valley 454 



Bristol valley 454 



High-level valleys 455 



Moraines 455 



Classification 455 



Valley-head moraines 456 



Valley-side moraines 456 



Glacial lakes 457 



Discussion and interpretation 458 



Location and general Description 



The region discussed is that part of the Allegheny plateau in western 

 New York which lies between the Canandaigua valley on the east and 

 the valley of the Genesee river and its tributary, Canaseraga creek, on 

 the west. It covers the northward slope of the plateau, here about 20 

 miles long. At its northern limit the distance from the foot of Canan- 

 daigua lake to the Genesee river is 25 miles. It is bounded on the south 

 by the Cohocton-Wayland valley, which connects the head of Canaseraga 

 with the head of Canandaigua, only 10 miles apart. It includes the four 

 western ringer lakes — Honeoye, Canadice, Hemlock, and Conesus — all of 

 which are tributary to the Genesee. The plateau rises from an elevation 

 of about 800 feet on the north to a crest above 2,000 feet in the southern 

 part of the region. Its northern third is underlain by the Marcellus, 



LVII— Bull. Geol. Soc. Am., Vol. 15, 1903 (449) 



