LAKE CHICAGO AND ITS OLD SHORE LINES 



[Uvanaton 



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



Lanc * bordering Lake Chicago at the Glen wood 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. 



