CLINTON GROUP. 



79 



10. CLINTON GROUP. 



Lower part of the Protean Group, divided into Clinton and Niagara Groups. Ferriferous 

 Slate and Ferriferous Sandrock of Eaton. 



(Pakt or the whole of No. 5, Pennsylvania Series.) 



11. 



No. 1 of the woodK:ut. BUobed fucoid (F. biloba). 



No. 2. Tail of the Clinton htmicrypturus (H. clintonii). 



No. 3. Eiurinat disk, rounded by solution. 



No. 4. Clinton Imgula (L. clintonii). 



No. 5. Depmttd ttrophomtna (S. depreua). 



This group, so well characterized by its iron ore beds, and its marine plants, both in this 

 district and in Pennsylvania, extends east and west through the district, resting in its whole 

 comse  upon the conglomerate ; and is therefore found to the south side of the Erie canal 

 through Herkimer and Oneida counties, but to the north of the canal through Madison, Onon- 

 daga and Cayuga ; extending on both sides of Oneida lake at its west end, passing out of the 

 district near to Lake Ontario on the north side, and on the south side by a line which passes 

 from the south side of Oneida lake to a little north of Wolcott village. In Herkimer, and in 

 the east part of Oneida, it exhibits but little more than its northern outcrop, excepting where 

 streams have exposed its surface and lateral edges ; but further west, it becomes a superficial 

 mass, or surface rock, forming a part of the great western level. 



At Sharon Springs, in the north part of Schoharie county, this group and the Niagara 

 group are not to be seen, having come to their end ; and the Onondaga salt group and the 

 Frankfort slate are so near to each other, both being undisturbed, as to preclude every other 

 deposit. 



