STRATIGRAPHY OF FOSSILIFEROUS MEMBERS 109 



The black flint in this vicinity was formerly used by the Indians for 

 making arrowheads, tools, and implements of various sorts; the color, 

 durability, and hardness made it very desirable for this purpose. Large 

 blocks of black, somewhat fossiliferous flint are scattered everywhere 

 over the fields along the outcrop. The geologic section on the Wheeler 

 farm is given below (Locality 72) : 



Section on the Wheeler Farm, Jefferson Township, Coshocton County 



Feet Inches 



Allegheny formation 



Limestone, Putnam Hill 3 



Pottsville formation 



Shale and covered ' 27 6 



Flint, gray, with shaly limestone,"! f 



fossiliferous__ T 5 



. ~ "~7."~ " ^ Lower Mercer ^ 



Flint, black, with gray limestone, [ 



fossiliferous J I 2 6 



Shale . ._ 5 



Coal, weathered "1 f -- ^ 



Shale . ^Bedford \ __ 4 



Coal, cannel, weathered J [2 1 



Clay 1 5 



Shale and covered 8 



Limestone, blue, fossiliferous. . . _ j Lower M&rcer _ _ _ _ J 1 



Limestone, blue, fossiliferous ) I 2 9 



Clay and covered 3 



The species listed below were collected: 



Nodosaria sp. 

 Textularia sp. 

 Fusulina secalica (Say) 



Rhombopora lepidodendroidea Meek 



Crania modesta White and St. John 



Productus semireticulatus (Martin) 



Pustula nebraskensis (Owen) 



Marginifera wabashensis (Norwood and Pratten) 



Spirifer opimus Hall 



Composita subtilita (Hall) 



Orthoceras isogramma Meek 



Holmes County. In northeastern Ohio, including Holmes, Stark, 

 Mahoning, and Columbiana counties, the Upper Mercer flint is entirely 

 replaced by limestone which resembles markedly the Lower Mercer 

 member. In Holmes County fossils were obtained from only one 

 locality, from a mine in the northeastern part of Section 33, Salt 

 Creek Township, one mile south of the county line (Locality 73). The 

 species found are listed below: 



