BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



VOL. 16, PP. 229-242, PLS. 37-42 APRIL 29, 1905 



DRAINAGE FEATURES OF CENTRAL NEW YORK* 



BY RALPH S. TARR 



( Read before the Society December SO, 190 J^) 



CONTENTS 



Page 



Description 229 



Introductory 229 



Location of the area r 229 



General topography 230 



Hanging valleys 230 



Hanging valleys in Cayuga and Seneca troughs 230 



Hanging valleys in the Tiougnioga trough 232 



Other hanging valleys 233 



Lowered divides 233 



General conditions 233 



Seneca and Cayuga valleys 234 



The Chemung near Elmira 234 



Cayuta yalley 234 



Tiougnioga valley 235 



Willsey ville valley 235 



Other instances 235 



Texas hollow 235 



Divides of smaller streams 236 



Present stream courses 236 



Interpretation 237 



Statement of hypotheses 237 



Ice-erosion hypothesis 237 



Ice-born stream-erosion hypothesis 239 



Headwater-erosion hypothesis 240 



Discordance of the Cayuga and Seneca valleys 241 



Conclusions 241 



Description 

 introductory 



Location of the area. — The region described in this paper is in southern 

 central New York, along and near the divide between the Saint Lawrence 



* Published by permission of the Director of the U. S. Geological Survey. 

 XXXI— Bull. Geol. Soc. Am., Vol. 16, 1904 (229) 



