904 GEOLOGY OF OHIO. 



and a half feet in naany seetions. There is more iron at this horizon by 

 far than at any other in the region, and it cannot be doubted that the 

 resources of science are adequate to the utilization of such a seam, even 

 though unfriendly elements are present in it. Such ores are made ser- 

 viceable elsewhere by exposure to the weather for one or two years after 

 they have been sharply roasted. 



At McCuneville, Perry county, the limestone beneath the ore is found 

 to be ferruginous enough to warrant it also to be ranked as ore. Portions 

 of it contain over twenty per cent, of metallic iron. 



8. At about thirty feet above the Gore Limestone and the Sand-block 

 another ore horizon occurs in the Hocking Valley. The ore that is found 

 here represents or replaces the Putnam Hill Limestone, or Gray Lime- 

 stone of the eastern counties, in part, and possibly includes also a kidney 

 seam that is found ten feet below the limestone at New Lexington. To 

 this horizon belongs a ferruginous limestone found at the Moss and Mar- 

 shall Furnace, and the heavy blue carbonate that is well shown at Hay- 

 denville. 



The Dunkel ore of Vinton county appears to find its place just here, 

 the intervals, however, varying a little from those given or implied 

 above. The last named seam is, perhaps, the most important of Vinton 

 county, the limestone or Baird ore alone being excepted. It ranges from 

 one and a half to two feet in thickness, and h>lds a large scope of country 

 to the north-east of McArthur. Many hundred tons of it have been 

 worked in Vinton Furnace, where it came to be highly esteemed. It 

 would seem to be a safe reliance for a furnace so located as to reach its 

 ■erea easily. Its place is about fifty feet below the limestone ore. 



9. The next regular deposit to be found in ascending the scale is the 

 seam known as the "Limestone Kidney Ore" in Vinton and Jackson 

 counties. Its place in Vinton is about fifteen feet below the Gray or 

 Hanging Rock Limestone which bears the limestone ore. The seam 

 known by this name in Jackson is twice as far from the limestone, but 

 it has the same character with the northern ore, and the workings of the 

 seam are almost extensive enough to establish the connection suggested. 

 The ore is of excellent quality, being esteemed by the furnaces as highly 

 as the limestone ore, in connection with which it is generally worked. 



In Perry and Hocking counties, ore is found at the same place in the 

 series, but has not been largely worked. At McCuneville this seam is 

 found in connection with a "btistard limestone." A heavy deposit of 

 gray ore, identical in general character with the Baird ore, is found ten 

 feet below the last named seam on the land of W. B. Brooks, Esq., at 

 Nelsonville. It agrees in position approximately with the kidney vein. 



