THE CARBONIFEROUS SYSTEM. 



149 



Analyses of Coal No. 6. 



Arter farm, New Lisbon, Columbiana county- 

 Isaac Dike's mine, Camp Run, Columbiana county. 

 Salineville, Big vein, Columbiana county. 

 Linton, " " 



Carbon Hill, " " 



Saunders', Millersburg, Holmes county. 

 Andreas' mine, Urichsville, Tuscarawas county. 

 Steubenville shaft coal, Steubenville, Jefferson county. 

 A. B. Hamilton, Waynesburg, Stark county. 

 Keith's mine, Coshocton county. 



Muskingum Valley Coal Company, Rock Run, Muskingum county. 

 New Straitsville, Perry county. 

 Nelsonville, Athens county. 



THE MAHONING SANDSTOVE. 



Coal No. 6 is immediately overlaid by a greater or less thickness of 

 shale. This is sometimes argillaceous, with many impressions of coal 

 plants ; in other localities — as in Holmes county — it is black, bitumin- 

 ous, and is crowded with fossil shells. Neither the plants nor shells, 

 however, are peculiar to this seam, but are species widely distributed 

 throughout the Coal Measures, both vertically and laterally. Occasion- 



