96 POTTSVILLE FAUNA OP OHIO 



Description of Geologic Sections and Collecting Localities 



Scioto County. The Upper Mercer ore is well developed in the 

 abandoned mine of Hanging Rock Iron Co., one and one-half 

 miles north of Ohio Furnace, Green Township. The lower layer is 

 calcareous enough to be called a ferruginous limestone. The ore is 

 very sparingly fossiliferous. The section measured in the mine fol- 

 lows (Locality 58) i 1 



Feet Inches 



Shale 2 



Ore, upper block 1 f __ 7 



Parting >Upper Mercer __ 



Ore, lower block J [ -- u 



Coal, dense, hard, Bedford 2 



The fossils collected at this locality include the following forms: 

 Crinoid segments 



Derbya crassa (Meek and Hayden). 

 Productus semireticulatus (Martin) 

 Marginifera wabashensis (Norwood and Pratten) 

 Spiriferina kentuckyensis (Shumard) 

 Spirifer boonensis Swallow ? 

 Spirifer opimus Hall 

 Squamularia perplexa (McChesney) 

 Composita subtilita (Hall) 



A few fossils were also found in the ore outcropping on the land of 

 Smith Hayward, Section 35, Bloom Township, where the geologic sec- 

 tion below was measured (Locality 59) : 2 



Feet ' Inches 



Shale and sandstone 10 



Ore, Upper Mercer 1 6 



Shale and covered 16 



Ore, Sand Block 1 



The forms listed below were collected here: 

 Crinoid segments 

 Archaeocidaris spines 

 Septopora biserialis (Swallow) . 



Derbya crassa (Meek and Hayden) 



Spirifer opimus Hall 



Spiriferina kentuckyensis (Shumard) 



Astartella concentrica (Conrad) 

 Conularia crustula White 



'Stout, W., Geol. Surv. Ohio, Fourth Ser.. Bull. 20 3 p. 581, 1916. 

 2 Idem. 



