24 POTTSVILLE FAUNA OF OHIO 



that the member consists of alternating gray and black shales and 

 sandstones with an occasional thin coal bed. 1 



The shales which form the roof of the Quakertown coal in Jackson 

 County have been found to be very sparingly fossiliferous. A diligent 

 search in the shales associated with the Quakertown coal at various 

 localities in southern Ohio was rewarded by only a few crushed specimens, 

 all of the same species, from three places in Coal Township, Jackson 

 County. With the exception of Lingulas from one locality in Summit 

 County, these forms constitute the only fossils discovered on the horizon. 



Description of Geologic Sections and Collecting Localities 



Lawrence and Scioto Counties. In Lawrence County the Quaker- 

 town coal does not appear at the surface and is known only from well 

 records. In Scioto County, however, the member is locally well de- 

 veloped. The following section measured on the land of William 

 Tripp, Section 14, Bloom Township, shows its relation to the Scioto- 

 ville clay below and to the Bear Run coal above: 2 



Feet Inches 



Coal blossom, Bear Run __ 6 



Clay shales, dark 3 6 



Shales, gray, and parts covered 28 



Sandstones, flaggy and medium bedded 13 



Coal outcrop, Quakertoum, seen to the south. 1 8 



Shales and covered 33 



Sandstones 7 



Coal, Anthony __ 2 



Clay, flint, dark, Sciotoville 6 



Jackson County. With the exception of Summit, this is the only 

 county from which fossils were obtained, all of them being from Coal 

 Township. Specimens are very rare, and all belong to the fresh or 

 brackish water pelecypod, Naiadites elongata Dawson. Collections 

 were made from the Wilson mine, northeastern part of Section 32 

 (Locality 9) ; from the Twin-Ada mine, central part of Section, 35 (Lo- 

 cality 10); and from the Grace mine, just east of Davis\ille in the north- 

 eastern part of Section 10 (Locality 11). The following section was 

 measured in the Grace mine and in the hollow to the east: 3 



dewberry, J. S., Geol. Surv. Ohio, Vol. Ill, p. 793, 1878. 

 2 Stout, W., Geol. Surv. Ohio, Fourth Ser., Bull. 20, p. 551, 1910. 

 3 Idem., p. 146. 



