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AX AMERICAN GEOLOGICAL RAILWAY GUIDE. (ILL.) 



10. Limestone of the Upper Coal Measures full of fossils. 



11. Minute shells in roof of coal seam, probably No 3. 



12. Upper Coal Measure limestone with fossil shells near Ramsey. 



13. Cincinnati group rich in fossils. 



14. Fossils in roof shales of coal seam, probably coal No. 5 or 6. 



15. Outcrop of Burlington limestone 2 miles north of Monmouth. 



16. Burlington limestone rich in fossils. 



17. Roof shales of coal rich in fossil plants, coal No. 2. 



18. Burlington limestone rich in fossils. 



19. Fossils abundant in roof shales of coal No. 5. 



20. Fossils in roof shales of coals No. 2 and 3. 



21. Fossils in roof shales of coal No. 5. 



