DEPOSITS OF THE LAKE CHICAGO BASIN 



station 62 (Plate I) 

 500 feet south of Lake Michigan. Surface 602 A.T.; 22 feet A.L.M. 



53 



Strata 



Deposit 



Depth 



Remarks 



XII 



Black sand 



8 

 2 

 2 



2Vz 

 2M 

 2 

 2 

 1 

 2 

 2 

 25 

 192 





XI 



Yellow sand 



1% inches in some places. 



X 



Clav. 





rx 



Yellow sand 





VIII 



Sand with wood 



\ l /2 inches in some places. 



VII 



Yellow sand 





VI 



Sandy clay 





V 



Wood 





rv 



Sand 





m 



Gravel 



1 inch in some places. 



ii 



Clay 



With rootlets in upper part. 



i 



Boulder clay 







Total thickness... 







242% 





station 63 (Plate I) 

 Gross Point, Lake Michigan. Surface 600 feet A.T.; 20 feet A.L.M. 



Strata 



Deposit 



Depth 



Remarks 



XII 



Black sand 



17 

 17 

 M 



m 



2 



M 

 i 



4 

 192 



Beach deposit. 



XI 



Yellow sand 



X 



Peat and wood 



- 



IX 



Yellow sand 





vm 



Peat and wood 





VII 



Yellow sand 





VI 



Wood 





V 



Yellow sand 





IV 



Sandy clay 



2 inches in some places. 



III 



Wood 



II 



Clay 



3 inches in some places. 



I 



Boulder clay 





Total thickness.... 







240K 





BIOLOGICAL REMAINS 



Strata III, VI, VIII, X 



Coniferous wood (Picea canadensis?) 

 Oak (Quercus species) 



