WELLS OP WOODFORD COUNTY, ILLINOIS. 671 



feet. A record of the M. T. Ames coal shaft at Minonk shows yellow and 

 blue tills to a depth of 62 feet, beneath which a harder till is entered, which 

 is interbedded with sand. 



At Elpaso the strongest wells are obtained, at about 115 feet, from sand 

 beds in the drift. The public water supply is obtained from such wells. 



The strongest wells in Eureka are found in beds of sand and gravel at 

 a depth of 60 to 100 feet. The waterworks are supplied from wells of this 

 class 60 feet in depth. Private wells are often obtained at depths of but 15 

 feet. The following- detailed record of a prospect boring for coal at this 

 town will serve to indicate the complexity of the drift beds. It is a copy of 

 a sworn statement made to the coal company by Gr. W. Darling, who did 

 the drilling: 



Section of prospect boring for coal at Eureka, Illinois. 



1. Top soil had been removed. Feet. 



2. Hardpan 8 



3. Blue clay and gravel 4 



4. Bowlders and large stones 2 



5. Coarse loose gravel and water 5 



6. Dark clay 2 



7. Variegated clay, different colors, with gravel 8 



8. Bowlders bedded in clay 6 



9. Cement gravel 41 



10. Very soft sand rock 3 



11. Quicksand, some water 2 



12. Coarse gravel - 1 



13. Clay and gravel 24 



14. Drift formation, gravel and sand 1 



15. Wood drift 1 



16. Different colored clay with some stone 43 



17. Soft soapstone 12 



18. Hard blue soapstone _ _ 37 



19. Black shale 3| 



20. Coarse coal and sulphur 01 



21. Good coal (splendid coal ) 2 



22. Coal debris (or horseback ) l j 



23. Soapstone 9 



24. Limestone 1+ 



25. Soapstone 31 



26. Limestone 21 



27. Soapstone 7 



28. Conglomerate rock, composed of sulphur, lime, flint, and iron 3 



29. Soapstone 47 



30. Blue hard slate 9| 



31. Black slate, rather soft , li 



32. Hard coal 3.1 



33. Fireclay 0-rV 



34. Soapstone 0£ 



