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 "Jhorizon. 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 to a 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 sf am is never heavy enough to warrant 

 the working of it for its 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 it was in blast. 



The Ewing 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 .Zbar 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 DISTETCT. 



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- 



