202 



GEOLOGY OF OHIO. 



south-west is not so well marked. Its steeper side is to the north-west, 

 the dip being about double what it is on the south-eastern side. 

 An approximate section of the county is as follows : 



1. 



2. 



3. 



4. 



5. 



6. 



7. 



8. 



9.' 

 10. 

 11. 

 12. 



13. <^ 



Debris 10 



Coal No. 12 2 



Sandstone, flaggy 50 



Coal No. 11 2 



Sliale, argillaceous 5 



Limestone 10 



Sandstone 20 



Limestone 10 



Sandstone 25 



Limestone 7 



Sandstone 8 



Shale 6 



ft. in. 



Coal 10 



Fire-clay 10 



Shale 1 8 



Coal 4 6 



Shale 3 



LCoal 4 



>CoalNo. 10 11 



14. 



15. 

 16. 

 17. 



18. 

 19. 



20. 



Shale, ferruginous 3 



Sandstone 60-75 



Shale 0-2 



Coal No. 9 2 



Limestone 15-30 



Shale 3 



ft. in. 1 



\ CoalNo.8 -. 7 



J 



I Coal 1 to2 



Fire-clay 1 



LCoal 5 



21. 

 22. 

 23. 

 24. 

 25. 

 26. 

 27. 

 28. 

 29. 

 30. 

 31. 

 32. 

 33. 

 34. 

 35. 



Fire-clay, with limestone 5 



Sandstone 10-40 



Limestone 3-60 



Sandstones and shales 60-100 



Coal 4 to 8 



Shales 8-11 



Crinoidal limestone 4-7 



Shales, with iron 6 



Coal No. 76 o q 



Shale and sandstone 90-104 



Shale, with iron ore 6 



CoalNo.7a 6 to 6 



Sandstone 40-50 



Shales, ferruginous 5_8 o 



CoalNo.7 3to4 



