STRATIGRAPHY OF FOSSILIFEROUS MEMBERS 101 



Pustula nebraskensis (Owen) 



Marginifera wabashensis (Norwood and Pratten) 



Spiriferina kentuckyensis (Shumard) 



Spirifer opimus Hall 



Composita subtilita (Hall) 



In Washington Township the Upper Mercer member consists of 

 black flint and flinty limestone and is well exposed in the ravine of a 

 small stream which flows from the east into the Muskingum River 

 opposite Ellis. Collections of both Lower and Upper Mercer fossils 

 were made at this locality (Locality 38). The geologic section follows: 1 



Feet Inches 



Allegheny formation 



Limestone, Putnam Hill 4 6 



Pottsville formation 



Covered 50 



Flint, black ferruginous... -} Upper Mercer...^ 1 10 



Limestone, dark, flinty I k __ 9 



Coal blossom, Bedford-.: __ 3 



Clay and clay shale 8 



Coal, good, Upper Mercer.. 1 2 



Clay 1 4 



Shale, siliceous 10 6 



Limestone, shaly ^ f 1 



Limestone, hard I Lower Mercer J _ _ 7 



Shale | 1 ._ 2 



Limestone, hard I I 1 8 



The species identified from the Upper Mercer flint and flinty lime- 

 stone are as follows: 



Fusulina secalica (Say) 



Girtyina ventricosa (Meek and Hay den) 



Crinoid segments 



Fenestella limbata Foerste 



Derbya crassa (Meek and Hayden) 



Chonetes mesolobus Norwood and Pratten 



Productus cora d'Orbigny 



Productus semireticulatus (Martin) var. 



Pustula nebraskensis (Owen) 



Marginifera wabashensis (Norwood and Pratten) 



Spiriferina kentuckyensis (Shumard) 



Spirifer cameratus Morton 



Spirifer boonensis Swallow ? 



Spirifer opimus Hall 



Composita subtilita (Hall) 



Good exposures are found also at several other localities in Wash- 

 ington Township. Good collecting is afforded from both the Lower 



'Stout, W., Geol. Surv. Ohio, Fourth Ser., Bull. 21, p. 106, 1918. 



