562 GEOLOGY OF OHIO. 



It. In. 



6. Not seen 25 



7. Sandstone 2 



8. Blossom of coal. 



9. Clays and limestones 10 



(Map XIV., No. 12.) 



At Bellair and vicinity the lower and main seam of coal has been 

 extensively mined for many years. It has been identified by the Penn- 

 sylvania geologists as the Pittsburgh seam. It dips below the Ohio 

 River, in this county, to emerge again in Meigs county, nearly one hun- 

 dred miles in a straight line to the south-west. The Newell's Run 

 uplift, in Newport, Washington county, brings it to the surface, but 

 it is here too thin to be of practical value. In the same uplift is the 

 upper Bellair, or upper Barnesville seam, but it is also thin. There are, 

 unfortunately, no valuable seams of coal directly upon the Ohio River 

 between Belmont and Meigs counties. This fact gives no little imp r- 

 tance to the coals of Belmont county. The Bellair or Wheeling coal is 

 highly bituminous and cementing, of good heating power, and makes a 

 durable fire. It requires a strong draft for its best combustion, and con- 

 siderable stoking. It is used in rolling mills, for the generation of steam, 

 and for all household and ordinary uses. The great seam underlies 

 nearly the whole of Pultney township, and is a source of great prosperity 

 to the region. A careful geological section was taken at Bellair, which 

 is of great interest in showing the remarkable limestone formation above 

 the horizon of the Bellair or Wheeling seam of coal. The section is as 

 follows : 



It. In. 



1. Fire-clay 3 



2. Clay, with thin layers of limestone 3 



3. Limestone 1 



4. Shale 3 



5. Notexposed 7 



6. Limestone " 2 



7. Shale, with nodular limestone 15 



8. Clay and interstratified limestone 5 6 



9. Limestone 6 



10. Notexposed 9 



11. Sandy limestone 2 6 



12. Clayey limestone 1 



13. Cement limestone 5 



14. Hard limestone 1 



15. Cement limestone 9 



16. Limestone 7 



17. Shale 4 o 



