128 J. J. STEVENSOK CARBONIFEROUS OP APPALACHIAN BASIN 



Central City represents the Brookville coal bed, which has persisted more 

 thoroughly than any other from Tyler county of West Virginia and 

 Monroe of Ohio.* 



KENTUCKY 



Passing over into Kentucky, one enters Greenup county opposite Law- 

 rence of Ohio. The Allegheny area is bounded at the west by the Little 

 Sandy river, which flows northward from Elliott county through Carter 

 and Greenup to the Ohio river, reaching that stream at about 10 miles 

 below Ironton. Boyd county, east from Greenup, extends to the Big 

 Sandy river, the state line. Professor Crandall's generalized section for 

 Greenup, Boyd, and Carter counties is: 



Feet 



1. Sandstone [Buffalo and Mahoning] 75 



2. Coal bed 9 [Upper Freeport] 



3. Sandstone and shale 50 



4. Coal bed 8 [Lower Freeport] 



5. Shale and sandstone 40 



6. Coal bed 7 [Middle Kittanning] 



7. Shale and sandstone 40 



8. Coal bed 6 [Lower Kittanning] 



9. Sandstone or shale 13 



10. Ore and limestone [Vanport] 



11. Shale and sandstone 30 



12. Coal bed 5 [Brookville] 



13. Interval 37 



14. Coal bed 4 [Tionesta] 



Two limestones are important in these counties; the lower, or First 

 Fossiliferous, is between the Freeport coal beds at 10 to 25 feet above the 

 Lower, and is present in all sections where not cut away by the Butler 

 sandstone ; it is often termed the "Yellow limestone," as is the Shawnee, 

 its equivalent in Ohio. It seems to be non-fossiliferous in Ohio, but in 

 Kentucky it carries a characteristic Carboniferous fauna. The Second 

 Fossiliferous limestone is in the Conemaugh and is the Lower Cam- 

 bridge of southern Ohio. These two limestones are persistent and enable 

 one to carry the section where the coal beds are absent or concealed. The 

 Vanport limestone is practically continuous along the western outcrop 

 into Elliott county, beyond which it has been recognized at a few points 

 in Morgan county as well as in northern Breathitt farther south; but in 

 both Morgan and Breathitt the localities are somewhat widely separated 

 and the continuous outcrop ends in Elliott. This limestone seems to be 



* E. Orton : Vol. iii, p. 928 ; vol. v, pp. 1038, 1046, 1054. 

 E. McMillin : Vol. v, p. 122, and personal communication. 

 I. C. White: Bulletin no. 65, p. 135. 



