EDGAR, FORD AND CHAMPAIGN COUNTIES. 267 



with that found in Champaign and Vermilion counties in the same position. 

 This was encountered at Grandview, in 1869, at a depth of fifty feet, in 

 the shaft attempted by Messrs. Holding in search of coal. 



Rock Formations. 



The rocks exposed within the county all belong to that portion of the Coal 

 Measures which lies above coal No. 6 of the Illinois valley section, or No. 7 of 

 the Wabash valley section, as given in the report upon Vermilion county. 

 Above that level, no workable seam of coal is .developed in this region. Im- 

 mediately upon the borders of the county, however, we find the outcrop of No. 

 7 and No. 6 is not far below. Both seams are probably workable by shafts in 

 all parts of the county. For the readiest understanding of the geology of the 

 county, I give the following general section : 



FEET. 



1. Soft clay shales 40 



2. Coarse sandrock and shales, with limestone bands 95 



3. Limestone, bottom often shaly 25 



4. Green, dark drab and black clay shale (level of " No. 12 ? ") 3 to 4 



5. Greenish shaly sandstone and sandy shales 12 " 15 



6. Green and drab clay shales 30 "40 



7. Light drab and greenish, very ferruginous sandy shales 15 "20 



8 Dark drab clay shale, with few large ironstones 5 " 6 



9. Impure shaly coal, " No. 9 ? " 1 



10. Greenish clay shales 8 " 10 



11. Sandy argillaceous limestone, containing pebbles of black limestone, and 



fragments of fossils If " 3 



12. Red and green, changing to green sandy shales and shaly sandstones, 



locally heavy-bedded, containing Cauleipites, and graduating below 



into 10 " 15 



13. Green and drab clay shales, with ironstones very numerous at bottom. . . 30 " 35 



14. Marly argillaceous limestone, with fossils 1-6 " ^ 



15. Soft black shale 2 



16. Coal, "No. 8?" 1-6 " f 



17. Fire-clay 3 4 



18. Light drab sandy shales, weathering greenish, with heavy ironstones .... 40 "50 



19. Dark drab sandy shales, weathering greenish, coarsely concretionary .... 12 " 15 



20. Light blue clay shales 15 "20 



21. Coal, top shaly, " No. 7 " 5 "6 



22. Fire-clay 6 "8 



23. Sandy shales : 10 " 12 



24. Limestone 1 " 2 



25. Sandy shales 8 " 12 



26. Compact sandstone 3 " 6 



27. Greenish sandy shale, with few ironstones 25 "30 



28. Black shale, some slaty, with very heavy pyritous ironstone nodules 5 " 6 



29. Coal,"No.6" 5 "6 



30. Fire-clay and soft clay shale 4 " 6 



