42 J.J. STEVEXSOX [,0\VER CARBOXIFEROUS, APPALACHIAX BASIX 



localities in central Ohio and on the Ohio river, in the southern portion 

 of the state ; 250 feet of shales and flags belonging to the Logan remain 

 near Portsmouth, on the Ohio. The lower portion yields a Burlington 

 fauna, while the Keokuk is found in a variable band of red sandstone 

 at the top."^ 



Paleontological details for Kentucky are wanting, but the Upper Knob- 

 stone or Logan is recognizable almost all the way across the state, the 

 underlying Devonian becoming thinner, until in northern Tennessee it 

 seems to disappear. Safford's lists t show that in Tennessee the fossils 

 of the Protean group are Keokuk, though two forms of Burlington affin- 

 ity are mentioned. In view of the southward disappearance of Kinder- 

 hook in Ohio, there is no room for surprise when one finds the Burling- 

 ton practicall}^ missing in Tennessee, and he is quite prepared for the 

 reference of the Alabama Lauderdale to the Keokuk by both Professor 

 Smith X and Mr McCalley.g 



It is possible to make an approximate correlation for the several parts 

 of the Appalachian basin, as follows: 



Lower Carboniferous : 



Shenango and Upper Meadville Northwestern Pennsyl-^ 



vania 



Logan, including Waverly shales Ohio Keokuk, Bur- 

 Upper 400 feet of Bedford and Hunt- }- lington, and 



ingdon Eastern Pennsjd vania.. . i Kinderhook. 



Coal-bearing shales and sandstone. . .Virginia | 



Upper plate of Big Injun West Virginia j 



Upper Knobstone of Kentucky Keokuk and 



Burlington. 



Keokuk. 

 Undeter- 



•1 



Protean of Safford Tennessee 



Lauderdale of McCalley. Alabama , 



Lowest Fort Payne of Hayes Georgia and eastern Ala 



bama r . ^ 



Lowest Newman of Campbell Tennessee and Virginia. 



Devonian : 



I. Lower Meadville, Sharpsville,Orange- 



ville, and Oil Lake of White Northwestern Pennsylvania. 



Cuyahoga and Berea Ohio. 



Rest of Pocono, Bedford, and Hunt- 

 ington counties Eastern Pennsylvania. 



Lower Pocono of Virginia. 



Upper Grainger of Southwestern Virginia. 



*C. L. Herrick : Ohio Reports, vol. vii, pp. 495-51;'). 



t J. M. Safford : Geology of Tennessee, p. 342. 



IE. A. Smith: Geological map of Alabama. Exp. chart, 1894. 



g Henry McCalley : Geol. Survey of Alabama, Valley regions of Alabama, part i, 189t), p. 35. 



