486 



STATE OF ILLINOIS 



DEPARTMENT OF REGISTRATION AND EDUCATION 



The Late Woodfordian Jules Soil 

 and Associated Molluscan Faunas 



John C. Frye 



A. Byron Leonard 



H. B. Willman 



H. D. Glass 



Leon R. Follmer 



ILLINOIS STATE 



John C. Frye, Chief 

 CIRCULAR 486 



GEOLOGICAL SURVEY 



Urbana, IL 61801 

 1974 



