N. Hl. Winchell on the Hamilton in Ohio. 397 
side of the anticlinal. There are no exposures in these counties 
0 
1872, this point was made the subject of careful investigation. 
The result arrived at was the conclusion that the beds which 
hold these Hamilton fossils are very near the bottom of the 
blue limestone. The evidence is not that of actually observed 
Superposition, but that which is based on a series of observa- 
2 along the Auglaize Valley, on the dip of the underlying 
rocks, i 
v 
4 . 
a very observable fact that the limestones of 
eral dip. It is so in Paulding County. The Water-lime, the 
lowest in the series of rocks in the county, occupies the most 
Occurs the outcrop which holds the abundant Hamilton fossils, 
the dip there being in the same direction and to the same 
farther north is Mr. Columbia’s quarry, in the beds of the same, 
or nearly the same, horizon. About three-quarters of a mile 
in quarried, sec. 
li, Defiance, Defiance County, where the dip is still north or 
mestone comes into view, and is wrought 
lime. A mile still farther, the Black Shale appears. Through- 
out the whole of this distance, there is no return of the strata by 
an exceptional dip. The beds occur in exactly that order se 
Should have if laid regularly down, like the shingles on a root. 
*They are Atrypa reticularis, Cyrtia Hamiltonensis, a handsome Orthis, Spirifer 
™ucr oF 1 ‘ | H. 
Stephene” Cpaisonste, ara Saupe, sod varus fe ncranng 
