6i8 L. C. SNIDER 



paper on the Mineral Resources of Northeastern Oklahoma^ the 

 same author describes the Short Creek oolite as being present 

 in the eastern half of the Wyandotte quadrangle but does not men- 

 tion the Grand Falls chert member. The extension of these mem- 

 bers to the southwest is problematic. 



As has been said the fauna of the Boone indicates the great 

 mass of it to be of Burlington-Keokuk age. It has been reported^ 

 to the writer that fossils suggestive of Warsaw age have been 

 found above the Short Creek oolite in Missouri. No collections 

 from this horizon in Oklahoma have been studied and the exact 

 age of the upper beds of the Boone formation in the State must be 

 considered an open question as yet. 



Unnamed limestone. — The upper limit of the Boone formation 

 is one of unconformity. If the upper part of the cherts of the 

 Boone are of Keokuk age, the time interval represented by the 

 unconformity includes all of Warsaw, Salem, St. Louis, and Ste. 

 Genevieve time. It is possible that more detailed work in the 

 Boone area may prove some of the lower of these formations to 

 be present, but so far as is known now they are absent. 



Immediately above the cherts of the Boone in the Tahlequah 

 quadrangle come a few feet of limestone which in this quadrangle 

 were mapped with the Boone. In the Muskogee quadrangle, this 

 limestone was found to be somewhat thicker and to be separated, 

 at least locally, from the Boone by a thin layer of shale. The 

 fossils proved the shale and limestone to be of Chester age, so 

 they were considered as part of the overlying Fayetteville shale. 

 North from the Muskogee, through the Pryor quadrangle this 

 limestone thickens very rapidly until it attains a thickness of 90 

 or 100 feet along Grand (Neosho) River east of Choteau and Pryor 

 Creek. In the Pryor quadrangle these rocks can be easily mapped 

 and must be regarded as a formation. In view of the fact that 

 this formation has been studied in the Vinita quadrangle, and that 

 it will probably be named in the reports of the United States 

 Geological Survey, no name is proposed here. This formation 

 includes all the rocks between the Boone chert and the typical 



' Bull. U. S. Geol. Survey No. 340. 



' Personal communication from H. A. Buehler. 



