STRATIGRAPHY OP FOSSILIFEROUS MEMBERS 



33 



Crinoid stems 



Lingula carbonaria Shumard 

 Orbiculoidea missouriensis (Shumard) 

 Derbya crassa (Meek and Hayden) 

 Marginifera muricata var. missouriensis Girty 

 Spiriferina kentuckyensis (Shumard) 



Astartella sp. 

 Posidonia girtyi n. sp. 



Pseudorthoceras knoxense (McChesney) 

 Orthoceras n. sp. 



Fish teeth 



In Madison Township this limestone occurs in several places. 

 Fossils were collected from the hard limestone which outcrops along 

 the east bank of the Muskingum River about one-half mile north of 

 Symmes Ford. The member here is 4 inches thick, and protrudes 

 prominently from the bank about 6 feet above water level. The sec- 

 tion below was measured along the Muskingum River near Symmes 

 Ford (Locality 21) : 



Section along Muskingum River near Symmes Ford, Madison Town- 

 ship, Muskingum County 



Feet Inches 



Limestone and flint, fossiliferous, Upper Mercer 2 6 



Coal, bony, Bedford 1 



Covered 3 



Sandstone, shaly 7 6 



Limestone, shaly, fossiliferous 1 1 9 



Limestone, blue, fossiliferous I L(ywer Mercer _ _ _ I 1 1 



Limestone, somewhat shaly, fossiliferous- 



Limestone, blue, fossiliferous J i. 1 7 



Shale, dark -- 4 



Coal, fair, Middle Mercer 1 1 



Clay, light, plastic 3 7 



Sandstone, shaly 4 



Shale r 7 



Limestone, dark, fossiliferous 1 



Ore 1 - >Boggs _.j . 



Limestone, dark blue, fossiliferous J I 1 



Covered 8 



Shale, gray 7 



Shale, dark . 1 



Limestone, gray, fossiliferous, Poverty Run 



Coal, Vandusen 



The fossils from this locality are: 



Crinoid segments 



J. B. 25. 



