SUPPLEMENTAL REPORT—HANGING ROCK DISTRICT. 911 
that a certain grade of iron can. be made here cheaper than anywhere 
else in the northern coal field. The iron made from the ore is very fusi- 
ble and somewhat deficient in strength, but still it is of a kind for which 
there is a large demand. 
Throughout the southern counties this horizon is always conspicuous 
as an ore or limestone horizon. It lies a little higher above Coal No. 6 
than at the northward, its average height being about one hundred and 
thirty feet. It yields an ore of large volume at Gallia Furnace, which 
has been worked to a considerable extent under the name of the Banda 
Ore. At Hecla Furnace it is known as top hill ore. In the vicinity of 
Flag Spring, Gallia county, a blue, fossiliferous limestone takes its place. 
This limestone has been sometimes confounded with the Cambridge 
Limestone, to the great confusion of the true geological order. In Vin- 
ton county and in Jackson, both ore and lime are generally found. The 
ore has been worked toa small extent on lands belonging to the Iron 
Valley Furnace. Coal has not been found in association with the ore at 
any point south of the Hocking Valley. All the trials made of the ore 
southward seem to indicate an undue percentage of phosphorus in it. 
In the accompanying chart of the iron ores of the district, the places 
of four other ores are indicated that lie still higher in the series than the 
Iron Point Ore. Wherever.the Cambridge Limestone is worked, more or 
less ore is found with it, but the seam is never heavy enough to warrant 
the working of it for ita own sake. 
About twenty feet above the Cambridge Limestone, in Aid township, 
Lawrence county, quite a heavy deposit of ore occurs. It was the main ) 
reliance of Oak Ridge Furnace for the short time that i¢ was in blast. 
The Kwing Limestone, in Trimble township, Athens county, carries 
with it a considerable volume of ore, the quality of which is, however, 
doubtful. 
It will be seen, then, that the valuable deposits of ore in this series 
occur chiefly at three horizons, viz., that of the Zoar or Blue Limestone, 
that of the Hanging Rock or Gray Limestone and in connection with or 
near the place of Coal No. 7. 
C. COAL SEAMS OF THE HANGING ROCK DISTRICT. 
The places and general relations of such of the leading coal seams of 
the district as fall within the limits of the section now under considera- 
tion, will next be discussed. The facts are represented to the eye in the 
accompanying engraved section, viz, Coal Seams of the Hanging Rock Dis- 
trict. 
1. The Jackson Shaft Coal, so widely and so favorably known, is cer- 
