Brown — Silurian Limestone of Milesburg Gap. 89 



zon can be correlated with the Decker Ferry of New Jersey 

 and the division between this and the overlying shaly limestone 

 is the dividing line between the Decker Ferry and the Rond- 

 out. No attempt is made to discuss the shale beds lying 

 above these limestones and below the Oriskany. Likewise, no 

 attempt is made to discuss the so-called Clinton shales lying 

 beneath this Decker Ferry horizon. However, it is the convic- 

 tion of the author that these beds are not of Clinton age, but 

 rather will eventually be found to correlate with the Poxino 

 Island shale and Bossardville limestone of the New Jersey sec- 

 tion and their equivalents in New York. No attempt has 

 been made to correlate any of the beds above mentioned with 

 the beds of probably corresponding age which outcrop along 

 the west bank of the Susquehanna in Perry county. It seems 

 to the author that these Perry county beds should be thor- 

 oughly restudied along the lines of the more recent work in 

 New Jersey and New York before any such attempt is made. 



