92 J. J. STEVENSON — CARBONIFEROUS OF APPALACHIAN BASIN 



coal bed, very thin, at 79 feet below the surface, which is very near the 

 level of the Upper Mercer horizon. Below this coal there are only blue 

 shales for 203 feet, with 8 feet of conglomerate at 112 feet and 10 feet of 

 sandstone at 150 feet. Underlying the shales is a mass of sandstone 

 and conglomerate, which Professor Orton was inclined to regard as rep- 

 resenting both the Lower Pottsville and the Logan; but in view of the 

 conditions at Hanging Rock and those soon to be mentioned in Ken- 

 tucky, it is safer to regard the 8 feet of conglomerate as the Sharon sand- 

 stone and the bottom of the Pottsville. 



Other counties along the Ohio river will be referred to in another 

 connection.* 



KENTUCKY 



Passing over into Kentucky, one finds the Main or Franklin iron ore, 

 which is at or very near the horizon of the Upper Mercer limestone, 

 persisting in the northern part of the state, where it is from 85 to 100 

 feet below the Ferriferous limestone, which is traceable for more than 

 half the distance to the Tennessee line. In studying the variations of 

 the Pottsville within Kentucky, it is best to follow the western outcrop, 

 where for the most part one finds the lower part of the section, and 

 afterward to take up the counties eastward to the line of Virginia and 

 West Virginia, in which the upper part of the section is shown, with 

 occasional exposures of the lower part where that has been brought up 

 by folds or faults. 



Greenup county adjoins Scioto and Lawrence of Ohio and is north 

 from Carter county. Professor Crandall's generalized section for these 

 counties is as follows, the identifications with Ohio beds being inserted 

 by the writer : 



Feet 



1 . Coal bed 5 



2. Horuewood sandstone [Homewood] 37 



3. Coal bed 4 [ Tionesta'] 



4. Shales and Block ore [Main] 8 



5. Sandstone 29 



6. Coal bed 3 [Mercer] 



7. Sandstone [Upper Connoquenessing] 112 



8. Coal bed 2 [Quakertown] 



9. Sandstone [Lower Connoquenessing] ... 35 



10. Shale [Sharon] 40 



11. Coal bed 1 [Sharon, Wellston] 



12. Shales 33 



* E. B. Andrews : On Scioto County, Report for 1870, pp. 163, 166, 167, 168, 173, 175, 176. 

 E. Orton: Scioto, vol. v, pp. 1040, 1042. Lawrence, vi, p. 305. 

 I. C. White : Bull. U. S. Geol. Survey, no. 65, p. 193. 



