6l8 NOTES ON THE PALEONTOLOGY OF LEWIS-OILMEN COUNTIES. 



WEST VIRGINIA 



SHOWING 



" PROGRESS OF 

 STUDIES OF 



Figure 12. Progress of Studies of Invertebrate Fossils. 

 FAUNAL HORIZONS. 



The stratified rocks which outcrop in Lewis and Gilmer 

 Counties are included within the Permian and the Pennsylva- 

 nian Systems, the latter being the upper division of the Car- 

 boniferous of eastern North America. The subdivisions of 

 these Systems recognized in the area are : 



Permian . . . . Dunkard Series. 



Pennsylvanian . . . 



Monongahela Series. 

 Conemaugh Series. 

 Allegheny Series. 

 Pottsville Series, (upper 

 portion, or Kanawha Group). 



The base of the Kanawha or Pottsville Series is not ex- 

 posed in the area. 



The horizons found to contain animal fossils are confined 

 to the Conemaugh Series and Kanawha Group ?nd ar? ~x- 



