CLINTON GROUP. 
79 
10. CLINTON GROUP. 
Lower part of the Protean Group, divided into Clinton and Niagara Groups. Ferriferous 
Slate and Ferriferous Sandroch of Eaton. 
(Part or the whole of No. 5, Pennsylvania Series.) 
li. 
No. 1 of the wood-cut. Bilobed fucoid (F. biloba). 
No. 2. Tail of the Clinton hemicrypturus (H. clintonii). 
No. 3. Encrinal disk, rounded by solution. 
No. 4. Clinton lingula (L. clintonii). 
No. 5. Depressed strophomena (S. depressa). 
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 
course 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. 
