200 GEOLOGY OF OHIO. 
THE SALINEVILLE FIELD. 
Salineville constitutes one of the older and more important mining 
centers of the State. It has been for 20 years a prominent contributor 
to the Cleveland market, and it is certain to continue a leading source 
of steam coal for Northern Ohio for an indefinite period. 
The true order of the series is well shown by Newberry in his 
several reports upon this section of the State. He followed the upper 
portion of the Ohio River series over the low Salisbury anticlinal to 
their fine development in the Salineville field. A question was by 
sufferance counted an open one by him for a while, as to the proper 
name and place of the coal seam of the Empire mine, but the identifica- 
tion which he provisionally made has been proved true. The Big Vein 
of the Farmer bank has been worked through to the Ohio and Penn- 
sylvania Company’s new slope, south of town, and this in turn has been 
followed directly into the Empire mine, about which the question was 
raised. The Empire coal is the Big seam. 
The two main coal seams of Salineville are therefore what New- 
berry pronounced them to be, viz., the Upper Freeport (Big Vein or 
No. 6), and the Brush Creek (Strip Vein or No. 7). Below the Upper 
Freeport the Lower Freeport or Roger seam is often found, but it is 
not invested with great economic interest in this immediate district, 
though it is worked at a few points. 
The Upper Freeport seam (Newberry’s No. 6) of this region is 
thoroughly characteristic in its mode of occurrence and quality. It is 
the “Big Vein” of the district, its normal thickness reaching 53-or 6 
feet. It has a single shale parting of 1 or 2 inches in thickness, from 
12 to 18 inches above the bottom, just as at Palestine, and the irregular 
“binders” of slate and pyrites that mark the seam elsewhere are also 
abundant here. The structure is represented in the following figure. 
All of the statements made in regard to the physical and chemical 
properties of the Palestine coal can be repeated with regard to this 
seam at Salineville without modification. Consequently, the statements 
that were made as to adaptations and uses in that field are found true 
in regard to this district as well. j 
The Salineville coal is a steam coal almost exclusively. Its high 
percentage of fixed carbon makes it efficient in heating power. 
It is coming into extensive use as a railroad coal, and bating a 
possible tendency to smut the flues of the locomotive, it is well esteemed 
