46 



LIFE OF THE PLEISTOCENE 



STATIONS 41 AND 42 



2000 feet north of Touhy Avenue and 200 feet north of Oakton Avenue Surface 595 feet 

 A.T.; 15 feet A.L.M. 



Strata 



Deposit 



Depth 



41 



42 



Remarks 



VII 

 VI 



V 

 IV 



III 



II 



I 



Silt and loam 



Gravels, pebbles, and sand. 



Clay 



Laminated clay 



Blue clay 



Laminated clay 



Boulder clay 



Total thickness... 



39 



2 

 20 



156 

 217 



45 

 4 

 21 

 30 

 18 

 4 

 96 



218 



With shells. 

 With plant roots. 



Sphaerium statnineum 



" emarginatura 

 Physa gyrina 

 Segmentina armigera 

 Ptanorbis parvus 



biological remains (Station 42) 

 Stratum VII 



Planorbis trivolvis 

 Galba caperata 



" reflexa 

 Succinea retusa 

 Cambarus blandingi acutus 



station 43 (Plates I, XX) 

 1000 feet north of Oakton A venue. Surface 595 feet A.T.; 15 feet A .L.M. 



Strata 



Deposit 



Silt and loam 



Sand and gravel 



Laminated clay interstratified 

 with layers of very thin sand.. 



Clay 



Laminated clay 



Blue clay 



Sandy Clay 



Boulder clay 



Total thickness.... 



Depth 



Remarks 



VIII 



VII 



VI 



V 

 IV 



III 



II 



I 



36 



5 



30 

 36 



4 

 16 



1 

 96 



224 



With shells. 



Rootlets in upper 10 or 15 inches. 

 With boulders. 



