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ILLINOIS STATE ACADEMY OF SCIENCE 



divide of the Illinois Ozarks and to find an outlet to the 

 south. 



2. In these lakes were deposited primarily sand and 

 silt. The silts are in some cases stratified, in others not 

 stratified. 



3. In an environment of such rough topography the 

 terminal morainic deposits are not pronounced. 



4. Outwash deposits are essentially lacking because 

 they were either not formed or have been subsequently 

 obliterated by erosion. 



Carbondale Quadranqle 



Glcctcl ' lokem volley of Prury Ck 



Ufft Oro.it Ck 



