STRATIGRAPHY OF FOSSILIFEROUS MEMBERS 35 



Feet Inches 



Limestone (Lower Mercer} 2 



Gray shale 20 



Coal 3 



Fireclay 2 



Drab shale 50 



Dark, siliceous limestone (LoweUville) 1 



Shale 1 20 



Black shale and iron ore 5 



Drab shale __ 50 



Sandstone 15 



Mahoninq River 



The fossils below were obtained from the LoweUville limestone at 

 LoweUville : 



Crinoid segments 



Orbiculoidea missouriensis (Shumard) 



Derbya crassa (Meek and Hayden) 



Chonetes choteauensis Mather 



Productus cora d'Orbigny 



Pustula nebraskensis (Owen) 



Marginifera muricata var. missouriensis Girty 



Marginifera wabashensis (Norwood and Pratten) 



Spiriferina kentuckyensis (Shumard) 



Spirifer opimus Hall 



Composita subtilita (Hall) 



Parallelodon sangamonensis (Worthen) 

 Pseu dor thoc eras knoxense (McChesney) 



. Summary 



The complete list of fossils collected from the LoweUville lime- 

 stone follows: 



Cordaites sp. 

 Calamites sp. 



Crinoid segments and plates 



Fenestella shumardi Prout? 

 Fenestella sp. 



Lingula carbonaria Shumard 

 Orbiculoidea missouriensis (Shumard) 

 Rhipidomella pecosi (Marcou) 

 Derbya crassa (Meek and Hayden) 

 Chonetes choteauensis Mather 

 Productus cora d'Orbigny 

 Productus semireticulatus (Martin) 

 Pustula nebraskensis (Owen) 

 Pustula punctatus (Martin) 



