DEPOSITS OF THE LAKE CHICAGO BASIN 



51 



stations 56-58 (Plate I) 



300 feet south of Central Avenue; Central Avenue; 300 feet north of Central Avenue. 

 Surface 600 feet A.T.; 20 feet A.L.M. 



Strata 



Deposit 



Depth 



Remarks 





56 



57 



58 





V 



Black top soil, sandy 



8 

 20 



42 

 156 









rv 



Yellow sand 



42 



13 



17 



44 



168 



Sand at surface in 5S 



III 



Coarse sand and gravel 

 Clay 





II 



40 

 156 



With rootlets. 



I 



Boulder clay 







Total thickness.... 







240^ 



238 



242 





E. CENTRAL AVENUE TO THE LAKE 

 STATION 59 



400-600 feet north of Milwaukee Railroad bridge. Surface 600 feet A.T.; 20 feet A.L.M. 



Strata 



Deposit 



Depth 



Remarks 





400 



600 





IV 



Sand 



7 



17 



49 



168 



30 



12 



42 



156 





III 



Gravel 





II 



Clay 



With rootlets. 



I 



Boulder clay 







Total thickness 







241 



240 





