808. N. H. Winchell on the Hamilton in Ohio. 
The inference is inevitable that the lowest layers occur in out- 
crop farthest south. Now, as there is no blue limestone ex- 
posed to the south of the mouth of the Little Flatrock, and 
since there are, on the other hand, abundant exposures to the 
north, the dip being, as stated, constantly to the north, the roc 
at the Little Flatrock, containing the Hamilton fossils men- 
tioned, must lie below the rest of the blue limestone observed, 
and very near the bottom of that formation. There can be no 
other evidence except that of actually observed superposition. 
The writer did not give strict attention to the subject of the 
downward limitation of well-known Hamilton fossils in the 
survey of any other county, having regarded the uniformity of 
lithological characters sufficient to establish the essential unity 
of the whole of the blue limestone, and never having noticed 
a lack of corresponding uniformity of paleontological charac- 
ters. These latter were sufficient to indicate the Hamilton age 
and the perfect parallelism of the blue limestone with the 
Hamilton pupae p of the adjoining State of Michigan. 
No. 5 is that which is seen in the Auglaize near the mouth 
of the Flatrock. It is much different from the blue limestone 
noidal ; and its mural faces in Delaware County present an ap- 
parently massive structure, with crumbling surfaces, the pieces 
falling out being an inch or two in diameter. Its thickness 5 
about twenty-eight feet. 
No. 6 has a thickness of about thirty feet. Its upper por 
tion is thin-bedded, and fit es for quicklime. Its lower por 
some places a prized building stone. It is of uniform gr 
and composition, being non-fossiliferous, and is susceptible 
of being cut or sawn into blocks of any desired dimensions 
It often passes for a sandstone, and has a light cream color 
when weathered. : 
o. 7 is perhaps ten feet thick; but only six inches have 
been seen in Paulding County. It is sometimes conglomertii®. 
Several large boulders derived from it were seen in the bed 0 
the Maumee, near Emerald. 
No. 8 is from six to ten feet in thickness. The quarry a 
Charloe is in No. 8. 
No. 9 is in wavy, or at least in distorted, bedding, a common 
feature of that phase of the Water-lime. 
