GEOLOGY OF OHIO. 101 



ally thinning out, and, at the railroad bridge, having entirely disap- 

 peared. 



At Mr. John Hayes's upper mine (the Empire Coal Company) the coal 

 worked is four to five feet below the railroad grade. Forty- two feet below 

 it two borings struck a seam of coal which measured, in one case, twenty- 

 four, and, in another, twenty-seven inches. At the lower mine of Mr. 

 Hayes, the coal worked lies above grade, is three to five feet in thickness, 

 with a slate parting. It is hard and bright, but contains more sulphur, 

 than No. 7, at Salineville. Fifty-two feet below it a seam of coal, said 

 to be five feet thick, was struck by Mr. Hayes, in a shaft. On Tidball's 

 Run Coal No. 7 has been worked by stripping in the bottom of the val- 

 ley. It is three feet thick, but explorations made toward the east show ■ 

 that it thins out to one foot. Higher up Tidball's Run, the Barren Measv 

 ures are seen overlying No. 7, and containing the black, nodular, fossilif- 

 erous limestone, to which reference has already been made. 



In the point opposite the lower mine of Mr. Hayes, a coal seam was 

 formerly worked, just above the water level. It here dips toward the 

 north-east, and is unquestionably the same as that worked by Mr. Hayes.' 

 Forty feet above it, in the cliff, is a bastard limestone, over which is a 

 fire-clay and a thin streak of coal which may represent No. 7. 



Further down the creek, near the mouth of Piney Run, a coal seam is 

 seen in the clifi", twenty feet above Yellow Creek. It is three and a half 

 to four feet in thickness, with a parting of slate one foot from the bot- 

 tom — evidently the same seam as that mined by Mr. Hayes, and that 

 once worked at the point above. Over the coal is a thin stratum of blue 

 shale, then a sandstone, and a slope of one hundred feet where the rock 

 is not well shown, but is apparently gray shale. Above this is a clifif of 

 gray shale, and back from the creek the characteristic strata of the Bar- 

 ren Measures. 



In the interval between the lower mine of Mr. Hayes and New Salis- 

 bury, the exposures of coal are now quite imperfect. Considerable min- 

 ing was formerly done here, mostly for the supply of the salt works, but 

 Tor some reason — probably because the coal seams do not here exhibit 

 Iheir best development — very little coal has been taken out for many 

 ■years. 



The coal worked at McGarry's Bank is apparently No. 6, No. 6 being 

 here below drainage, but said to have been reached in borings. 



At New Salisbury ^oals No. 3, No. 4, No. 5, and No. 6 are shown, and 

 we have the general section of the lower portion of the valley. 



At Irondale the entire series of coals may be recognized, and here are 

 extensive mines, a furnace, rolling-mill, and an establishment for coal 



