884 GEOLOGY OF OHIO. 
territory that is now inaccessible, but in any case, a very valuable and 
promising body of the Upper Freeport coal is already in sight in the 
Brush Creek Valley. 
These statements complete the accounts of the Lower Coals of 
Muskingum county. While there is not a large mine in the county, the 
aggregate production is not insignificant, but the mining is of such a 
character as to escape public notice and record to a great degree. The 
possibility of larger mining interests has, however, here been pointed 
out. 
COAL MINES OF PERRY COUNTY, NORTHERN AND 
CENTRAL TOWNSHIPS. 
Under this head all of the coal mines of Perry county will be con- 
sidered except those of the southern tier of townships, viz., Monday 
Creek, Salt Lick, Coal and Monroe, to which may be added the south 
line of sections of Pleasant township. The ground on which this 
separation is made is obvious. The last-named townships belong to the 
Hocking Valley field, constituting an important portion of what is 
known as the “ Great Vein” territory, in which the Middle Kittanning 
seam (Coal No. 6) ranges from 5 to 13% teet in thickness. 
The general character of the district, now to be considered as a 
coal producing region, agrees very closely with that of Muskingum 
county, last described. The coal seams that possess econoniic value 
in Muskingum county are valuable also in Perry county, but to the 
three seams which furnish the main supply of the former connty, viz., 
the two Kittanning coals, Nos. 5 and 6, and the Upper Freeport coal, 
No. 7, one other must be added, viz., the Lower Freeport coal (No. 6a). 
This is mined in Clayton, Pike and Pleasant townships of Perry county, 
to a small extent. 
The geological range of Perry county is quite extensive. It 
includes the uppermost two hundred feet of the Waverly group, and it 
reaches to the level of the Pittsburgh coal, but that part of it, now 
under consideration, is chiefly confined to the Lower Coal Measures. 
This series has a full and geologically interesting development here, but 
