O NEW YORK STATE MUSEUM 



[title 37] shows the west-leading channels west of the Batavia dis- 

 trict. These two general maps depict all the glacial stream chan- 

 nels in central-western Xew York except those leading to southern 

 drainage and the higher cross-ridge channels. 



The detailed maps, plate- 2—5 utilize as a base the sheets of the 

 Xew York State topographic map. The series herewith given forms 

 a complete map of the belt along the 43d parallel between Leroy 

 and Oneida, a distance of over 125 miles, with the exception of the 

 Weedsport quadrangle, on which no channels have been located. 



Beyond the territory of plate 5 the glacial stream channels have 

 already been depicted in the same style or convention employed 

 in the accompanying maps. The maps included in former publi- 

 cations [titles 2$. 31. 37], in conjunction with the maps here in hand 

 show with some detail all the later ice border drainage from the 

 extreme wrest end of the State, at State Line, eastward to Little 

 Falls in the Mohawk valley. 



Acknowledgments. For courtesies and assistance in the study of 

 the glacial geology of central Xew York the writer is under pleasant 

 obligations to many persons, and special thanks are due the follow- 

 ing: Dr C. E. Fairman. Lyndonville; Mr J. W. Holmes. Batavia: 

 Mr W. S. Hosmer. Clifton; Mr E. P. Clapp. North Rush; Mr J. P. 

 Slocum, Albany, formerly of Xunda: Mr Shelley G. Crump. Pitts- 

 ford; Mr D. D. Luther. Naples; Mr X. L. Ogden. Penn Yan; Dr 

 M. A. Yeeder. Lyons; Mr Philip F. Schneider, Syracuse; Dr S. 

 Ellis Crane, Onondaga Valley and Prof. George H. Chadwiek, 

 Canton. 



Dr G. K. Gilbert was the first to recognize the significance of the 

 drainage features, and to him the writer is especially indebted. 



Terminology. A few words require frequent repetition in this 

 writing. To save a reiteration of the term " channel " as applied 

 to the excavated path of a stream, the term " scourway " will 

 sometimes be used to name the shallow and less definite channels, 

 rge " and " canyon " will sometimes be applied to deep, nar- 

 row channels, specially if they have rock walls. The common terms 

 cut, notch and terrace will sometimes be used where appropriate. 



The terms " ice border " and " proglacial," applied to the drain- 

 age along the edge or front of the ice sheet, are used as equivalents. 



