174 GEOLOGY OF OHIO. 
of excellent quality, and is now largely used in the manufacture of fire- 
bricks, both at Mineral Point and Dover. In most iocalities where this 
stratum is opened in Stark county, it seems to be of the ordinary plastic 
character, but near Waynesburg, in the valley of the Sandy, it exhibits 
very much the appearance it has at Mineral Point. It will be of some 
importance to have it generally known that the fire-clay under Coal No. 5 
is so peculiar in character, and is often of such value, since it runs 
through several of the more southern townships of Stark county. It 
may be found to possess its best character in localities where nothing is 
now known of it. 
Over Coal No. 5 we find, in Tuscarawas county, an important deposit 
of iron ore, and one which has supplied much of the “kidney” ore used 
in that county. This stratum is probably nowhere rich enough to 
pay for drifting, but where it crops out on the hill-sides it may justify 
_ stripping. 
Coat No. 6. 
This coal lies some fifty feet above Coal No. 5, or from eighty to one 
hundred feet above the upper of the two lower limestones, and is one of 
the most important and wide-spread coal seams of the State. It is the 
“Big Vein” of Columbiana county, the shaft coal at Steubenville, the 
most important seam of Holmes, Tuscarawas, and Coshocton counties, 
and is also the “Great Vein” of the Hocking Valley district. In Stark 
county it runs through all the hills east and south of Canton. It is the 
coal worked at Clark’s mine and several others in Osnaburg, and is 
thence transported for blacksmiths’ use to all parts of the county. In 
this region it varies from four to six feet in thickness, and crops out and 
is worked in numerous localities in Osnaburg and Mapleton. Passing 
thence southward, it loses in thickness and importance, until in the edge 
of Tuscarawas county it becomes less valuable than the next lower seam. 
At Waynesburg it appears well, and thence reaches round through the 
highlands of Paris and Washington into Columbiana county, retaining 
its volume and value all the way to the State line. At New Franklin, 
in Paris, it is opened on the farm of H. J. Courtney, where it is five feet 
ten inches thick, and shows, as usual, a slate parting eighteen inches 
above the bottom. It extends from this point northward, through Wash- 
ington, as far as Alliance, but becomes thinner in this direction. In all 
parts of Stark county Coal No. 6 is a coking coal, generally of good thick- 
ness, and capable of affording an excellent fuel for blacksmiths’ use or 
the generation of steam. When coked it may be used for iron-smelting. 
It sometimes contains considerable sulphur, but this may, however, be 
eliminated by washing. In the southern tier of townships—Sugar Creek, 
