FOLDS IN THE APPALACHIAN SYSTEM 289 



true of the dips of the beds in the Seneca Lake valley — similar hori- 

 zons lying as high or higher at the axis of the anticlinal fold two miles 

 south of Montour Falls as at Cottage Point eight miles north. On 

 crossing the axis of the Alpine antichne, however, a south dip ranging 

 from 3 to 8° brings the beds very rapidly toward sea-level. 



The various maps of the New York State Survey, which cover 

 portions or the whole of this region, have evidently been constructed 

 on the supposition of an approximately uniform southerly dip in the 

 region about the southern ends of the Seneca and Cayuga Lake 

 basins. As a consequence, the Chemung-Portage parting, as shown 

 on these maps, involves an inaccuracy of several miles in many 

 places. In the "Finger Lakes Sheet," and the revised state map 

 published in 1901, the northern limit of the Chemung between the 

 Seneca and Cayuga basins is drawn about ten miles south of its 

 actual northern limit, while the Portage has been found by the 'writer 

 above drainage several miles south of the southern limit shown by 

 the map. 



The conclusions stated above have, as shown, been reached 

 through a study of the stratigraphy, but supplementary paleonto- 

 logic work has been found to confirm them throughout. The writer 

 has found typical Chemung fossils at the northern edge of the Wat- 

 kins quadrangle, about ten miles north of the northern limit of the 

 Chemung, as given by the New York state map for that meridian. 

 Due east of Ithaca, Spirifer disjunctus has been found in the higher 

 beds, which have heretofore been supposed to belong to a Portage 

 terrane and which lie about seven miles north of the Portage- Che- 

 mung boundary for that region, according to the New York state 

 map. 



Edward M. Kindle. 



New Havex, Conn. 



