M1NEOLA LIMESTONE. 15 



Platyceras sp. nov. 

 Loxonema sp. 

 Gomphoceras sp. 



All of Greger's species excepting Gypidula marionensis, 

 Cranaena marionensis, Turbinopsis (Pleurotomaria) providencis 

 Broadhead, and Lunulicardium grande Miller and Gurley were 

 collected from number 3 of a section in Moniteau County which 

 he describes as follows: 1 



MISSISSIPPIAN. ft. 



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, fossiliferous 10 



DEVONIAN, Cooper limestone. 



No. 3. Bluish, compact limestones, alternating thick and thin beds, fossiliferous 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 



The fossiliferous part that Greger calls Cooper grades upward 

 into the Callaway, without break save change in lithology, 

 while there is a distinct unconformity below the fossiliferous 

 part, and the rock below has the typical lithology of the Cooper. 

 The fossiliferous bed is about one foot thick and should be classed 

 with the Callaway. All of Greger's species belong with the 

 Callaway excepting the four listed above. The writer is unable 

 from fragmentary materials to distinguish Greger's species as 

 different from those described from the Callaway. The Martinia 

 cf. glanscerasi (White) is probably the one described in this 

 bulletin as Martinia halli. The Cyathophyllum sp. is Branson's 

 Strepielasma cooperensis which occurs in the Cooper as well as in 

 the Callaway. Pleurotomaria providencis Broadhead is common 

 along the river bluffs near Providence in Boone County and in 

 the outcrops in Marion County. Favositis alpenensis Winchell is 

 the most widely distributed species. 



MINEOLA LIMESTONE 



Historical. — The only reference in geoligical literature to a 

 middle Devonian formation older than the Hamilton, other 

 than the Cooper, in central Missouri, is in Broadhead's report on 

 Warren County. He refers to it as follows: 



»Op. cit., p. 23. 



