LAKE CHICAGO AND ITS OLD SHORE LINES 



Fig. 53. Map of the Chicago plain and adjacent moraine. 

 ^x'x Land bordering Lake Chicago at the Glenwood stage. 

 /// Added land as the lake dropped to the Calumet stage. 

 \ \ \ Land added by drop to Tolleston stage. 



Land added by drop to present level in white. 



Sand bars dotted. 



