386 GEOLOGY OF OHIO 
ing to the direction shown generally by the glacial strie in this district, 
the nearest point from which it could have been derived is the high 
ground between Morris’s Hill and Genn Town. 
Spring Hill, or Wilkerson’s Hill—the outlier marked D on the map— 
lying upon the eastern line of the county, is worthy of mention as the 
most southerly of the Clinton limestone outliers in south-western Ohio. 
It is traversed by the Lebanon and Wilmington road, and may be recom- 
mended as giving the clearest and most interesting exhibition of the line 
of junction of Lower and Upper Silurian formations shown in the county, 
and indeed in this respect it is not surpassed in the State. The Clinton 
beds here yield in their outcrops very beautiful fossils, especially of the 
corals that belong to them. 
THE NIAGARA LIMESTONE. 
The main outlier, marked A upon the map, adds to the scale of the 
county the Niagara formation. This great division, it will be remem- 
bered, generally begins with beds of shale, but in south-western Ohio a 
local exception is often marked in the occurrence at this point of a very 
heavy and even-bedded limestone, of great value for building stone, 
known quite extensively as Dayton stone. 
This variety of the lower beds of the Niagara occurs in Winer county. 
It is shown most clearly in its connections on the land of Stephen Bur- 
nett, three miles north of Waynesville. Ina valley near Mr. Burnett’s 
house, the uppermost beds of the Cincinnati group are exposed, and the 
Clinton limestone overlying them, while in the fields a few rods beyond 
a valuable ledge of glacial planed Dayton stone is found. It has been 
quite extensively quarried here. There are several other quarries of the 
same stone in this outlier, the most valuable of which are located along 
its southern extension. The heaviest section measured is found on the 
farm of Dr. William Stokes. The Niagara shales here overlie the Clin- 
ton limestone, and the higher courses, or the Springfield beds, furnish 
excellent quarry stone. This section hasa thickness of at least fifty feet, 
a fact which agrees with one already stated, viz., that the highest land of 
Warren county is to be looked for in this very locality. 
These three formations—the Cincinnati group, the Clinton and Niagara 
formations—complete the geological scale of the county, so far as its bed- 
ded rocks are concerned. 
- DRIFT. 
The drift beds of the county have no feature to distinguish them in 
any way from those of the adjacent counties already discribed. The 
