D. K. Greger — Devonian of Central Missouri. 23 



In this section the basal conglomerate of the Cooper 

 is absent, as also is the St. Peter sandstone. The three 

 Devonian formations are replete with their characteristic 

 fossils. The Cooper, No. 2 of the section, contains an 

 abundance of Turbonopsis providencis (Broadhead), 

 Favosites sp. with occasional specimens of Lunulicardium 

 grande, Loxonema sp., and Gomphoceras sp. 



Section in Moniteau county : Exposures of the Cooper 

 limestone in Moniteau county are confined to the Missouri 

 River bluffs and a small area along Splice creek near the 

 town of Lupus. The following section was measured in 

 Sect. 15, Twp. 47, Range 14 West, along the river front: 



Mississippian. ft. in. 



No. 7. Light gray, crinoidal, Burlington limestone. ... 15 

 No. 6. Yellowish, shaly limestones and thin beds of 



shale, Chouteau 65 



No. 5. Sandy shale, blue-green, soft in places 1 



Unconformity. 



Devonian, Callaway limestone. 



No. 4. Gray and brown, gritty limestones, f ossilif erous . 10 



Unconformity. 



Devonian, Cooper limestone. 



No. 3. Bluish, compact limestones, alternating thick and 



thin beds, fossilif erous 8 



No. 2. Very sandy conglomerate, blue and black oolitic 



cherts 3 



Unconformity. 



Ordovician, Jefferson City formation. 



No. 1. Brown and buff, dolomitic limestone 5+ 



No. 4 of this section carries a typical Callaway lime- 

 stone fauna, the more abundant species being Syringo- 

 thyris occidentalis (Swallow), Athyris fultonensis (Swal- 

 low), Atrypa reticularis Linnaeus, along with some unde- 

 scribed corals. The 8 feet of blue and drab close-grained 

 limestone, represented by No. 3 of the section, is the 

 Cooper limestone, and in addition to the characteristic 

 Turbonopsis providencis (Broadhead), Lunulicardium 

 grande Miller and Gurley, and Favosites sp., the following 

 forms occur here: 



Cyathophyllnm sp. (common), Spirifer lupusensis sp. nov. 

 (common), Schuchertella altirhynchus, sp. nov. (common), 

 Stropheodonta cooper 'ensis sp. nov. (common), Camarotoechia 

 splicensis sp. nov. (rare), Martinia sp. cf. glanscerasi (White) 

 (not common), Martinia sp. cf. sublineata Meek (common), 

 Platyceras sp. nov. (rare), Loxonema sp. (rare), Conocardmm 

 cooperensis sp. nov. 



