STRATIGRAPHY OF FOSSILIFEROUS MEMBERS 107 



Fusulina secalica (Say) 

 Crinoid segments 



Cystodictya carbonaria (Meek) 



Derbya crassa (Meek and Hayden) 



Chonetes mesolobus Norwood and Pratten 



Pustula nebraskensis (Owen) 



Marginifera wabashensis (Norwood and Pratten) 



Spiriferina kentuckyensis (Shumard) 



Spirifer cameratus Morton 



Spirifer opimus Hall 



Squamularia perplexa (McChesney) 



Composita subtilita (Hall) 



Coshocton County. The Upper Mercer limestone is exceptionally 

 well developed in the southern part of Jefferson Township, southwest 

 of Warsaw, where it attains the unusual average thickness of 8 feet. 

 Fossiliferous limestone is everywhere associated with the flinty phase. 

 About one mile east of Mohawk village the deposit is exposed in the 

 roadbed and also near the mouth of the coal mine of Lee Moore, a 

 few hundred yards north of the road (Locality 70). The character of 

 the member at the mine is shown in the following geologic section: 



Feet Inches 

 Allegheny formation 



Limestone, Putnam Hill 5 



Pottsville formation 



Covered. _ __-__. 42== 



Flint, gray, calcareous, fossiliferous _ 

 Shale 



Limestone, gray, shaly, fossiliferous- 



Upper Mercer 



Shale, gray 



Flint, black, with gray limestone 



Coal, bituminous. . _ _ _ _1 Bedford _ / 



Coal, cannel J I 



1 3 

 2 



2 2 

 2 8 



1 9 



2 2 

 5 6 



The limestone and flint here are unusually fossiliferous for the 

 member and yielded the following forms: 



Fusulina secalica (Say) 

 Crinoid segments 



Fenestella limbata Foerste 

 Fenestellidae undetermined 

 Pinnatopora sp. 



Septopora biserialis var. gracilis (Meek) 

 Rhombopora lepidodendroidea Meek 



Derbya crassa (Meek and Hayden) 

 Chonetes mesolobus Norwood and Pratten 

 Productus cora d'Orbigny 

 Productus semireticulatus (Martin) 



