Handbook of Paleontology 403 



the exposures at the falls of Wiscoy creek at Wiscoy, 

 Alleghany county. The fauna is a sparse one (Naples), 

 both in species and individuals. Eastward the more 

 sandy stratigraphic equivalent is the Prattsburg sand- 

 stone (Clarke '03) which carries a Chemung fauna. This 

 formation received its name from Prattsburg, Steuben 

 county, and has a thickness of 250 to 600 feet. It extends 

 as far east as Chemung county. 



In central New York the Cashaqua shale becomes in- 

 volved with the Sherburne flags (its stratigraphic equiva- 

 lent in the east) bearing the Ithaca fauna. The Enfield 

 shale (Williams '06), with a thickness of 200 to 900 feet, 

 constitutes the upper part of the original "Ithaca group" 

 of Hall; the restricted Ithaca (80 to 500 feet) the lower 

 part, beneath which is the Sherburne sandstone. The 

 name is from Enfield in Tompkins county. The Ithaca 

 shale member (Hall '39), named from Ithaca, Tompkins 

 county, contains an abundant representation of a more or 

 less modified Hamilton fauna, but westward it passes 

 horizontally into beds with the Naples fauna. Farther 

 east there is little evidence of the Ithaca fauna and the 

 beds take on the lithologic character seen in the Oneonta, 

 indicating different physical conditions during deposition. 

 The Sherburne flags (Vanuxem '40) were named from 

 Sherburne, Chenango county. These beds have a thick- 

 ness of 185 to 250 feet. In central New York they rest 

 upon the Genesee beds, in Otsego county upon the Tully 

 limestone, in the east following the Hamilton beds and 

 apparently extending into Pennsylvania. The best faunal 

 development occurs in Otsego and Schoharie counties, 

 fossils being rare farther southeast. In the east the upper 

 beds have been considered contemporaneous with early 



