STRATIGRAPHY OP FOSSILIFEROUS MEMBERS 31 



Pottsville formation Concluded. 



Feet Inches 



Clay shale 2 



Shale, blue 3 



^ a ! e ' Kr\' I 88 " 6 - "I Q^ertown. { - 



Shale, black, bony J L __ 2 



Clay, siliceous 1 10 



Ore, siliceous 1 3 



Shale f H arrison s __ 1 



Ore, siliceous : J L __ 3 



Waverly formation 



Limestone, Maxville 6 



The limestone from this locality is extremely hard and contains 

 many fragments of fossils, which are for the most part too poorly pre- 

 served to be identified. The list includes the following identifiable 

 forms : 



Crinoid segments and plates 

 Fenestella sp. 



Derby a crassa (Meek and Hay den) 



Chonetes choteauensis Mather 



Pustula punctatus (Martin) 



Marginifera muricata var. missouriensis Girty 



Spirifer opimus Hall 



Composita subtilita (Hall) 



The fossils below were collected from the black shale above the 

 hard limestone on Poverty Run: 



Crinoid segments 



Orbiculoidea missouriensis (Shumard) 



Derbya crassa (Meek and Hay den) 



Chonetes choteauensis Mather 



Productus cora d'Orbigny 



Pustula nebraskensis (Owen) 



Marginifera muricata var. missouriensis Girty 



Rhipidomella pecosi Marcou) 



Spiriferina kentuckyensis (Shumard) 



Ambocoelia planoconvexa (Shumard) var. 



Edmondia sp. 

 Leda bellistriata Stevens 

 Parallelodon obsoletus (Meek)? 

 Aviculopecten pellucidus Meek and Worthen 

 Aviculopecten coxanus Meek and Worthen 

 Euchondria neglecta (Geinitz) 

 Pleurophorus tropidophorus Meek 

 Astartella concentrica (Conrad)? 



Schizostoma catilloides (Conrad) 

 Pseudorthoceras knoxense (McChesney) 



