28 ECONOMICAL GEOLOGY. 



In discussing the character of the drift deposits of this county 

 Prof. Bradley says: "The purity of the white water-bearing 

 quicksand which underlies the drift calls to mind the character 

 of the St. Peters sandstone at its outcrop in LaSalle county, 

 in which region it supplies several large artesian wells. The 

 southern continuation of the anticlinal axis which brings this 

 rock to the surface at that point, would pass not far from 

 Champaign; and it is altogether probable that the aforesaid 

 quicksand is really a part of the disintegrated outcrop of that 

 bed distributed over the bottom of the ancient channel* which 

 must have exposed it at some point in this region." 



How far south this axis extends is a point as yet undeter- 

 mined, and its effect upon the productive coal measures in the 

 counties lying to the southeast of Douglas can only be deter- 

 mined by the drill, or the more expensive method of shafting. 

 If it extends to the Wabash river it would cross that stream in 

 the vicinity of Vincennes. 



The record of the following borings in Livingston county were 

 furnished by D. E. Morgan, Esq., of Strawn. 



Boring at the lumber yard in Strawn by H. Clarke. 



No. Ft. In. 



1. Soil 3 



2. Gravel 1 



3. Yellow clay 3 



4. Blue clay 17 



5. Sand and gravel with water 10 



6. Light brown clay 20 



7. Hard pan 2 



8. Coarse gravel 8 



9. Brown clay 14 



10. Blue clay 9 6 



11. Sandstone 8 



12. Clay shale 13 



13. Coal 2 6 



14. Fireclay 3 6 



Total depth 114 6 



ii 



Another boring near the section house west of the creek gave 

 the following result: 



No. Ft. In. 



1. Soil 3 



2. Gravel 2 



* For further remarks on this ancient channel the reader is referred to the preced- 

 ing chapter, page 11, and also to page 273 of vol. iv, of these reports. 



