Illinois State Geological Survey 



Bulletin 90, Plate 7 



... 'i v 



r"S> c - : vV : ' v j 



>^v 



10 



%> 



16 „ ft 



«& 



&& 



4/ 



8 *,*> 





1 



r- l'^ 



» 



WW: 



\z 



^^m$M 





17 



; >; )' ,, -. 



■HJS™ 



Peppers — Pennsylvanian Spores 



87 



