496 GEOLOGY OF OHIO. 



geologically, i. e., the center of the uplift in the valley two or three rods 

 above the Perkins oil well No. 1, and form a section upward, we shall 

 find the strata in their order. If to -the rocks not seen directly there we 

 add the higher ones found in their proper geological position in the hills 

 to the east, we shall have a complete and very interesting section, as 

 follows : 



Ft. In. 



1. Yellow shale 25 



2. Coal, Hobson seam , 1 4 



3. Clay, " 4 



4. Coal, " 8 



5. Clay 1 



6. Black bituminous slate 10 



7. Coal 1 



8. Clay 3 



9. Limestone 4 



10. Not exposed , 18 



11. Heavy sandrock 60 



12. Shale 10 



13. Coal, " sandstone " or Cumberland seam (not measured). 



14. Not exposed 75 



15. Blue limestone 4 



16. Buff limestone 2 



17. Limestones and shales 10 



18. Coal, Pomeroy seam (not measured). 



19. Notexposed 98 



20. Blue limestone 5 



21. Not exposed 40 



22. Bed of Cow Run. 



(See Map XII., No. 28.) 



The upper coal, which is stratigraphically three hundred and thirty 

 feet above the bed of Cow Run in the center of the uplift, is found about 

 two miles east, and the actual level, by barometer, shows it to be only 

 one hundred and nineteen feet above, so rapidly have the rocks on the 

 eastern slope dipped to the east. The western dip is also well marked. 

 In the center of the uplift the buff limestone group, with its coal, is 

 one hundred and fifty-three feet above the bed of the run. This group 

 dips below the bed of Cow Run about three-eighths of a mile west. If 

 to this we add eighteen feet for the fall of the stream, we have the whole 

 dip in this distance one hundred and seventy-one feet. 



The heavy sandstone over the " sandstone " or Cumberland coal is 

 brought down to the bank near the mill-dam on the Little Muskingum, 

 just below the mouth of Cow Run. Under this rock the coal has been 

 dug. The upper coal of all, the Hobson seam of the western part of the 



