30 NEW YORK STATE MUSEUM 



was also the first to appear in the Bertie waterlime which marks the 

 close of the Salina.^ 



The following species have been obtained from the Pittsford shale: 



Favosites sp. Pseudoniscus roosevelti Cla?'ke 



Orthothetes cf. interstriatus Hall Hughmilleria sociaiis Sarle 



Pterinea cf. emacerata Conrad H. sociaiis var. robusta Sarle 



Cephalopod sp . Eurypterus pittsfordensis Sarle 



Ceratiocaris praecedens Clarke Pterygotus monroensis Sarle 

 Emmelezoe decora Clarke 



Vernon and Camillus 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 tl:ie Mohawk valley and westward. 

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

 thin band of light gray. 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 yet 

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

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

 increasing 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. 



The Vernon shales are shown along the canal and adjacent to it 

 at Pittsford. Farther east they are well exposed between Pittsford 

 and 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 A^ernon shales, 



iSee N. Y. State Paleontol. An. Rep't. 1902. p. 1158. 



