3° NEW YORK STA'i E MUSEUM 



was also the firsl to appear in the Bertie waterlime whi< h marks the 

 close of the Salina. 1 

 Tin- following species have been obtained from the Pittsford shale: 



Pseudoniscus roosevelti Clarke 

 Orthothetes cf. interstriatus Hall Kughmilleria socialis Sark 



Pterinea cf. emacerata Conrad II. socialis var, robusta Sarle 



Cephalopod sp, Eurypterus pittsfordensis Sarle 



Ceratiocaris praecedens Clarke Pterygotus monroensis Sarle 



Emmelezoe decora Clarke 



Vernon and Camittus shales. On account of the thick covering of 

 drift material these formations could not be differentiated on the 

 map. The heavier shade of color for the former represents 

 approximately the relative position of this formation. 



The Vernon red shales derive their name from the village of 

 Vernon in Oneida county. They have been recognized as far east 

 as Herkimer county and are well shown in many of the water 

 courses and on the hills south of the Mohawk valley and westward. 

 In color they are of a nearly uniform red, except for an occasional 

 thin band of light -ray. In their western extension more of the thin 

 grayish bands appear. In a general way these shales resemble the 

 lower red shales of the Medina and this similarity gave no little 

 trouble to the early geologists. Like the shales of the lower Medina 

 the Vernon shales are without fossils and salt springs are known in 

 both, indicating that the conditions of sedimentation during which 

 they were formed were similar. 



The absence of workable deposits of gypsum in the Vernon 

 shales is of some interest since it involves conditions which as vet 

 have not been explained. As these beds lie below the great salt 

 deposits of the Salina, it would be natural to assume that the 

 in< reasing concentration of the sea would have precipitated 

 gypsum before the more soluble salt. It is possible that the 

 gypsum may be disseminated in the great thickness of Vernon 

 shales which averages about 600 feet. 



1 he \ ernon shales are shown along the canal and adjacent to it 

 at Pittsford. Farther east they are well exposed between Pittsford 



a\m\ Cartersville. Various shades of red and green of these shales 

 can be observed at these outcrops. 



The great beds of rock salt occur just above the Vernon shales, 

 Rep't. 1902. p. n 5 3. 



