D. K. Greger — Devonian of Central Missouri. 21 



Mississippian, Chouteau limestone. ft. in. 

 No. 10. Yellowish, gray and blue, thin-bedded lime- 

 stones and shale 70 



No. 9. Sandy shale, blue to green, sometimes quite 



soft 8 



Unconformity. 



Devonian, Cooper limestone. 



No. 8. Heavy bed of limestone, blue, with very small 



limpid calcite crystals 8 4 



No. 7. Heavy bed of limestone, similar to above, lighter 



in color 4 10 



No. 6. Brown, somewhat platy limestone 6 2 



No. 5. Light brown, gritty limestone, fossiliferous 3 



No. 4. Blue-gray, very compact limestone 8 



No. 3. Drab, gritty, porous limestone 2 



No. 2. Sandy conglomerate, much blue and black, oolitic 



chert 14 



Unconformity. 



Ordovician, St. Peter sandstone. 



No. 1. White, friable sandstone, with rounded grains. . 3+ 



Water's edge. 



The only fossils found in the Cooper at this locality are 

 Favo sites sp., Turbonopsis providencis (Broadhead), 

 Lunulicardium grande Miller and Gurley, and Gom- 

 phoceras sp. These were found only in No. 5 of the 

 section. 



Section in Cooper county, on La Mine River, Sect. 4, 

 Twp. 46, Eange 19 : 



Mississippian, Chouteau limestone. ft. in. 



No. 7. Yellowish, impure limestones and shale 50 



No. 6. Compact limestone, gray, buff and blue 30 



No. 5. Thin layer of blue-green shale 8 



Unconformity. 



Devonian, Cooper limestone. 



No. 4. Heavy-bedded, gray, brown and drab limestones . 45 



No. 3. Conglomerate, white sand with gray and black, 



oolitic chert 2 



Unconformity. 



Ordovician, St. Peter sandstone. 



No. 2. White, friable sandstone, with rounded grains. . 25 



Unconformity. 



Ordovician, Jefferson City formation. 



No. 1. Gray and buff, dolomitic limestones 20+ 



The Devonian interval is represented in No. 4 of this 

 section by 45 feet of typical Cooper limestone; fossils 

 are rare here, three specimens of the* ubiquitous Tur- 



