BULL. GEOL. SOC. AM, 



VOL. 13, 1901, PL. 33 



Conemaugh formation (26-44) 

 Allegheny formation 

 Wi25 25 Upper Freeport coal 



24 Upper Freeport limestone 

 ^ (Bolivar fire-clay) 



22 23 Upper Freeport sandstone 



22 Lower Freeport coal 

 21 Lower Freeport limestone 

 18 20 Lower Freeport sandstone 

 19 Upper Kittanning coal 



18 Middle Kittanning coal 



17 17 Lower Kittanning coal 



16 "Split-six" coal 



15 Kittanning sandstone 



14 14 Ferriferous limestone 



13 Clarion sandstone 

 12 12 Clarion coal 



11 Brookville coal 

 Pottsville formation (1-10) 



Henry (Bore- Henry (Bore- 

 hole No. 5) hole No. 1) of Dobt 



ho 



