202 GEOLOGY OF ILLINOIS. 



river, apparently at the junction of the limestone with the sandstone 

 ■which lies above it. Consequently, we may consider this as the geolog- 

 ical horizon of the main salt brine of this portion of the State. 



With the exception of a small outlier of Chester limestone in the 

 south-western part of the county, near the corner of Pope and Hardin 

 counties, no other localities are known in Gallatin where the sub-car- 

 boniferous rocks can be found outcropping; and wherever examined 

 these rocks, quite contrary to what is usual, show a remarkable paucity 

 of organic remains, and. the few that were observed it was found 

 impossible to preserve. 



Coal Me a tires. 



The section which accompanies this report represents the entire 

 thickness of coaLstrata in Gallatin county, and contains, it is believed, 

 all the workable beds of coal, together wi<h some of the most impor- 

 tant thin seams that are to be found in the county. 



Section of the rocks in Gallatin county : 



Ft. In. 



No. 1. Silicious shale 10 



No. 2. Heavy bedded sandstone 5 to 40 



No. 3. Siliceous and argillaceous shale 25 



No. 4. Limestone (Carthage rock ?) .' 8 



No. 5. Shale and thin Coal No. 9 3 



No. 6. Shales, partly bituminous and calcareous 30 



No. 7. Bituminous shale 2 



No. 8. CoalNo.8 2 



No. 9. Siliceous shale and sandstone 40 



No. 10. Limestone 4 



No. 11. Bituminous shale to 3 



No. 12. CoalNo.7 4 to 7 



No. 13. Sandstone and shale 41 



No. 14. CoalNo.6 2 6 



No. 15. Shales and thin bedded sandstone 65 



No. 16. Bituminous shale 2 to 5 



No. 17. Coal No. 5 5 



No. 18. Fireclay 3 



No. 19. Clay shale "with iron stone 3 



No. 20. Sandstone and shale 78 



No. 21. Shale partly bituminous 2 



No. 22. Coal No. 4 2 6 



No. 23- Shale and thin bedded sandstone 42 



No. 24. Thin coal (local) 4 



No. 25. Fireclay 5 



No. 26. Shale with iron stones in upper part 43 



No. 27. CoalNo.3 3 



No. 28. Sandstone and shale 19 



No. 29. Bituminous shale 5 



No. 30. CoalNo.2 1 4 



No. 31. Argillaceous shale 20 



No. 32. Thin bedded sandstone and siliceous shale with thin coal 60 



No. 33. Hearth sandstone 20 



No. 34. Argillaceous sha'e 40 



