230 GEOLOGY OF OHIO. 
13. Middle Kittanning shale, containing kidneys of ore, and sometimes masses 
of fossiliferous limestone. 
12. Lower Kittanning coal (No. 5 of Newberry). 
ll. Kittanning clay. 
10. Putnam Hill limestone and ore. / 
Brookville coal (No. 4 of Newberry). 
Tionesta coal. 
Upper Mercer limestone and ore. 
Upper Mercer coal (No. 3a of Newberry). 
Lower Mercer limestone and ore. 
Lower Mercer coal (No. 3 of Newberry). 
Massillon sandstone. 
Sharon shales. 
Sharon coal (No. 1 of Newberry). 
[> 9 b> G8 Se Se ge ge 
The discussion of the Massillon coal field will be reserved for a 
subsequent portion of this report. 
The coal supply of the county, aside from this important source, is 
chiefly confined to the following seams, viz., the Brookville or Upper 
Limestone coal, the Lower and Middle Kittanning, and the Upper 
Freeport coals. In addition there is one locality where the Tionesta 
coal yields a considerable supply. The Mercer coals both appear in 
their proper places in innumerable sections, but they nowhere attain 
workable thickness. A similar statement may be made as to the Lower 
Freeport coal. 
The Brookville or Upper Limestone coal will be first described. 
It is Newberry’s No. 4 for this region. It has been worked for a long 
time in Plain and Lake townships, and in the adjoining township of 
Green, Summit county, though heretofore in country banks only. In 
Canton and Pike townships, it has also been worked in a small way at a 
number of points for many years, but since the opening of the Valley 
Railway, four shipping mines have been developed in the seam, one at 
Greentown, one in Plain township, 3 miles north of Canton, and two 
mines in Pike township, at Fox Run and Evansdale, respectively. The 
seam is thus coming into the general market, and is now for the first 
fairly tested in its adaptations thereto. 
The section at Greentown, including the coal, is as follows. It 
was obtained at Stripe’s Clay Works, $ mile below the station, and is 
represented in Fig. XXXVI: 
