DEPOSITS OF THE LAKE CHICAGO BASIN 



stations 12 & 13 (Plate I) 

 1935-1950 feet north of Foster A venue. Surface 590 feet A.T; 10 feet A .L.M. 



31 



Strata 



Deposit 



Depth 



Remarks 





12 



13 





xni 



Silt and loam 



18 

 14 

 2A 



uy 2 



2 

 13 



ioy 2 



9 



zy 2 



2V 2 

 6 

 2 

 34+ 



my 2 



18 

 14 



2y 2 



2 

 13 



ioy 2 

 4A 



21 



2 

 26+ 



131 





XII 



sat 





XI 



Sand 





x 



Silt 





IX 



Sand 





VIII 



Silt 



Thin beds of sand % and~l 



inch apart. 

 With Unios. 



VH 



Silt 



VI 



Sand and gravel 



With Unios on surface. 



V 



Silt 



With wood. 



IV 



Sand and gravel 





III 



Silt 



With wood. 



II 



Sand 





I 



Boulder clay 







Total thickness.... 





STATION 14 



1985 feel north of Foster A venue. Surface 590 feet A.T; 10 feet A .L.M. 



Strata 



Deposit 



Depth 



Remarks 



XIV 



Silt and loam 



31 



A 



20 



5 

 2 



1A 

 A 



VA 

 A 



8 

 14 

 10 



3 



24+ 



Black, clayey. 

 With shells. 



xrn 



Silt 



XII 



Silt 



Without life. 



XI 



Silt 



With sandy lavers. 



x 



Silt 



With shells. 



IX 



Silt 



Without life. 



VIII 



Sand 





VII 



Silt 





VI 



Sand 





v 



Silt 





rv 



Gravel and sand 



With Unios 



ni 



Silt 



With wood. 



ii 



Sand 





i 



Boulder clay 







Total thickness.... 







128^ 





