STRATIGRAPHY OF FOSSILIFEROUS MEMBERS 125 



Spinfer o pirn us Hall 

 Composita subtilita (Hall) 



Edmondia gibbosa (McCoy) 



Parallelodon carbonarius (Cox) 



Parallelodon obsoletus (Meek) 



Parallelodon tenuistriatus (Meek and Worthen) 



Schizodus curtus Meek and Worthen 



Schizodus subcircularis Herrick 



Schizodus mooresi Miller ? 



Aviculopecten coxanus Meek and Worthen 



Acanthopecten carboniferous (Stevens) 



Crenipecten foerstii Herrick 



Entolium aviculatus (Swallow) 



Lima retifera Shumard 



Allerisma terminale Hall 



Pleurophorella costata (Meek and Worthen) 



Pleurophorus immaturus Herrick 



Pleurophorus tropidophorus Meek 



Astartella concentrica (Conrad) 



Astartella varica McChesney 



Pharkidonotus percarinatus (Conrad) 

 Schizostoma catilloides (Conrad) 

 Naticopsis nanus (Meek and Worthen) 



Pseudorthoceras knoxense (McChesney) 



Hocking County. In Hocking County the member consists of both 

 fossiliferous limestone and shale interbedded with each other. The 

 following geologic section measured near the plant of the National Fire 

 Proofing Co. at Haydenville, Green Township, in the southeastern 

 part of the county, shows the character and relations of the stratum: 



Feet Inches 



Sandstone, shaly 10 8 



Shale, dark, calcareous, fossiliferous, McArthur 1 



Coal, Tionesta _ 5 



Sandstone, hard __ 9 



Shale, bony, hard 1 7 



Coal, hard 1 f __ 2 



Shale, fossiliferous ? Bedford < __ 5 



Coal, hard J [ __ 5 



Clay, light, siliceous 11 6 



In Section 36, Green Township, at the mine of the Logan Clay 

 Products Co., one mile east of Logan, excellent collections can be 

 obtained from the limestone and shale. The following geologic section 

 was measured at this locality (Locality 86) : 



