CONEMAUGH FORMATION IN OHIO 199 



limestone is concealed in the sections by Andrews and Gilbert, but it was 

 seen by Mr Lovejoy in the northern townships, along the Meigs border, 

 at 5 or 6 miles southwest from Pomeroy. The Jeifers coal, separated 

 by 40 to 50 feet of sandstone and shale from the Pittsburg, occasionally 

 attains economic importance in the eastern part of the county, where it is 

 accompanied by a persistent impure limestone 1 to 10 feet below it. 

 Near Gallipolis a bed of red shale 20 feet thick begins at 132 feet below 

 the Pittsburg, very near the horizon of the "Big Red."f 



Lawrence county is south from Gallia and extends along the Ohio 

 river, adjoining Cabell and Wayne counties of West Virginia and Boyd 

 of Kentucky. The section, as measured by Mr Emerson McMillin near 

 Greasy ridge and Arabia, about 12 miles north from Central City, in 

 West Virginia, and nearly 20 miles west of south from Gallipolis, is : 



Feet. Inches 



1. Pittsburg coal 



2. Interval 150 



3. Ames limestone 2 to 4 



4. Interval 92 



5. Slate coal 2 6 



6. Interval 35 



7. Cambridge limestone 3 



8. Coal bed [Anderson] 3 



9. Shale 10 to 25 



10. Lower Cambridge limestone 3 



11. Shale 6 



12. Sandstone [Buffalo] 42 



13. Coal bed [Brush Creek, Upper] 3 to 4 



14. Clay 4 



15. Shale 20 



16. Coal bed [Brush Creek, Lower] 2 



17. Ore bed [Mahoning] 2 



18. Mahoning sandstone 20 



to the Upper Freeport (Waterloo) coal bed, giving in ail about 400 feet 

 for the Conemaugh; but this is the minimum, the maximum being be- 

 tween 420 and 430 feet. The Upper Cambridge is at 280 feet below the 

 Pittsburg, very nearly the same as in the Pomeroy well. The Slate coal 

 bed is very near the Barton horizon, at which coal has appeared sporadic- 

 ally at many places along this western outcrop. In a personal communi- 

 cation, Mr McMillin states that the Upper Cambridge is comparatively 

 pure, usually yielding a good lime, but the lower is always siliceous, often 

 flinty, and frequently represented only by calcareous shale. The in- 



* E. B. Andrews : Vol. i, pp. 232, 235-23G. 

 E. Orton : Vol. v, p. 1049. 

 E. Lovejoy : Vol. vi, p. 632. 



