BULL. GEOL SOC. AM. 



VOL. 13, 1901, PL. 37 



se 





.53 



S3 

 SI 



SO 



49 



48 

 47 



45 





55 



47 

 45 









ss 

 so 



45 













m 



:-.v, .--■-■- 





fr 













" 











' 



Two miles north Bor.l.n shaft 

 of Mount 



Pumping shaft Near Lona 





(After near Loua- 



Scaie : 1 inch = 100 feet 

 SECTIONS OF THE MONONGAHELA FORMATION 



