52 POTTSVILLE FAUNA OF OHIO 



Pottsville formation Concluded. 



Feet Inches 



Sandstone, shaly 3 



Sandstone, coarse grained 5 6 



Shale 1 6 



Limestone, dark, fossiliferous, Lower Mercer 1 



Shale, dark 2 



Shale and covered " 11 



Level of Baltimore & Ohio Railroad tracks. 



The fossils listed below were obtained from this locality: 



Crinoid segments 



Fenestella sp. 



Septopora biserialis (Swallow) 



Rhombopora lepidodendroidea Meek N 



Derbya crassa (Meek and Hay den) 



Chonetes choteauensis Mather 



Chonetes mesolobus Norwood and Pratten 



Productus cora d'Orbigny 



Productus semireticulatus (Martin) 



Pustula nebraskensis (Owen) 



Marginifera muricata var. missouriensis Girty 



Marginifera wabashensis (Norwood and Pratten) 



Spirifer cameratus Morton 



Spirifer opimus Hall 



Squamularia perplexa (McChesney) 



Composita subtilita (Hall) 



Aviculopecten coxanus Meek and Worthen 

 Acanthopecten carboniferous (Stevens) 



Pseudorthoceras knoxense (McChesney) 



A collection of fossils was also obtained from outcrops in the road, 

 Section 13, Washington Township, about one mile west of Hamden, 

 where the member has a thickness of about 10 inches (Locality 33). 

 The geologic section below shows the relation of the Lower Mercer 

 limestone to the Boggs ore below and to the Lower Mercer or Little 

 Red Block ore above: 



Feet Inches 



Ore 1 f .. 3 



Shale ? Lower Mercer s 1 



Ore._. , J [ __ 10 



Shale, very fossiliferous 1 6 



Shale -__ 2 1 



Limestone, Lower Mercer '_ __ 10 



Clay shale 2 



Coal _- 2 



Shaly sandstone and covered 14 



Ore, Boggs __ 6 



