DRIFT DEPOSITS OF ILLINOIS ir, 



of which only one specimen was obtained in a condition to be 

 determined, This specimen was submitted to the late Dr. St imp- 

 son, of Chicago, for examination, and was by him decided to be 

 a Helif-ina ocnilta. 



One of the first attempts to shaft for coal in this State was 

 made at Coatslmrg. in Adams county, and this shaft afforded 

 the first evidence obtained of the existence of a bed of soil 

 beneath the boulder clay. The following is a copy of the record 

 of this -shaft : 



Ft In. 



boil and yellow clay 6 



Clay with gravel and boulders 85 



Black soil 2 6 



Stratified clay 6 



Tough blue clay 20 



Total 119 6 



This shaft was located on the high prairie that forms the 

 divide between the Illinois and Mississippi rivers. 



At Decatur. in Macon county, two beds of soil were p, 

 through in sinking the coal shaft at that point, and the follow- 

 ing is a copy of their record as published by the local pr- 



Ft. In. 

 Soil and clay 31 



Sand, with two clay bands 11 



Quicksand 2 6 



Tough clay 4 



Black soil 2 ,; 



Sand -2 



Clay ""/_' 3 



Greenish sand .-. 6 



Gravelly hard-pan H 



Black soil 2 



Quicksand 4 



Gravelly clay 24 



Quicksand 6 g 



Total 109 6 



At Pana. in Christian comity, about thirty miles south of 

 Decatnr. the two ancient soils of the above section were also 

 encountered in their shaft as is shown by the following record: 



Soil and clay 11 



Blue clay 4 



Sand and gravel 12 



Hard red clay 18 



Black soil 



Blue clay J7 



Black soil 2 ,; 



Blue clay i< 



To?al 127 



