GUERNSEY COUNTY. 221 



An approximate section of the county is as follows : 



FT. I^■. 



1. Sandstone 30 



2. CoalNolO 3 



3. Fire-clay 3 



4. Sandstone 45 



fi. Coal No. 9 2(?) 



6. Sandstone 50 "0 



7. CoalNo.8 4 



8. Fire-clay, with iron 12 



9. Limestone 6 



10. Shales, semi-argillaceous 25 



11. Sandstone 25 



12. Limestone 3 



13. Sandstone and shale 85 



14. Crinoidal limestone 2-5 



15. Shales '. 2-10 



16. CoalNo.76 3 



17. Fire-clay 2 



18. Sandstone and shale r- 75 



19. Shale 10 



20. CoalNo.7a 2 



21. Fire-clay 1 6 



22. Sandstone 45 



23. Shales 10 



24. Coal No. 7 5 to 8 



25. Fire-clay 2 



26. Sandstone 80 



27. Shales 10 



28. CoalNo.6 3 



29. Fire-clay 4 



30. Shale 20-40 



31. Gray limestone - 2 



32. CoalNo.4 2-5 



33. Fire-clay 15 



34. Shale 20-46 



35. Blue limestone 3 



36. Coal No. 3, cannel 2 6 



Coal No 10 is found only along the eastern margin of the county, and 

 is not worked. The same is true of Coal No. 9. 



Coal No. 8, though of economical importance only in Millwood and 

 portions of Oxford and Londonderry townships, is of interest, as here we 

 find its western limit, and with it that of the Upper Coal Group, north of 

 the Central Ohio Railroad. The line begins at the railroad, in Millwood 

 township, near Belmont county, and runs west through the township to 

 and one mile north of the road to section 32, where it turns abruptly 

 northward through sections 33 and 34, into Oxford township. There it 



