GEOLOGICAL SURVEY OE THE STATE OF NEW YORK. 



(GEOLOGICAL MAP.) 



THE STRATIGRAPHIC POSITION OF THE PORTAGE SAND- 

 STONES IN THE NAPLES VALLEY AND THE 

 ADJOINING REGION. 



JAMES HALL, 



State Geologist. 



I). DANA LUTHER, 



, Issistcmt. 



i 8ms. 



V 



