STRATIGRAPHY OF FOSSILIFEROUS MEMBERS 103 



localities in the flint which was found. A portion of the Rock Cut 

 section is repeated below (Locality 28): 



Feet Inches 



Shale 5 



Flint, black, fossiliferous, Upper Mercer 2 



Coal, with shale bands \ B di d 4~~ ^ 



Coal, somewhat bony / " k 2 4 



Clay, siliceous 1 6 







The following fossils were collected: 



Textularia sp. 



Nodosaria sp. 



Fusulina secalica (Say) 



Girtyina ventricosa (Meek and Hayden) 



Crinoid segments 



Derbya crassa (Meek and Hayden) 



Productus semireticulatus (Martin) 



Pustula nebraskensis (Owen) 



Marginifera muricata var. missouriensis Girty 



Marginifera wabashensis (Norwood and Pratten) 



Spirifer cameratus Morton 



Squamularia perplexa (McChesney) 



Myalina pernaformis Cox 



Bulimorpha inornata (Meek and Worthen) ? 



In Madison Township outcrops of the member are numerous. A 

 few fossils were collected from the hard, flinty black limestone, 2J feet 

 in thickness, which outcrops near the top of the cliff on the east bank 

 of the Muskingum River north of Symmes Ford. The lower part of 

 the exposure consists of hard, fossiliferous limestone while the upper 

 part is composed of black flint. The geologic section at Symmes Ford 

 shows especially well the relation of the marine limestones of Mus- 

 kingum County to each other 1 (Locality 21). The fossils obtained in- 

 clude the following species: 



Textularia sp. 



Nodosaria sp. 



Fusulina secalica (Say) 



Girtyina ventricosa (Meek and Hayden) 



Crinoid segments 

 Fenestella limbata Foerste 

 Derbya crassa (Meek and Hayden) 



J See geologic section at Symmes Ford, given .under the discussion of the Lowell- 

 ville member, p. 33. 



