T4 C. W, Honess — Stanley Shale of Oklahoma. 



Feet. Inches, 

 containing fossil plants, seeds, etc. {Collec- 

 tion No. 473) 6 



9. TMn-bedded dark sandy shales and sandstones 



containing fossil plants in tivo horizons . 7 

 8. Massive evenly bedded gray resistant sand- 

 stones in beds 1 to 11 feet thick 25 1 



7. Dark shales and thin dark sandstones par- 

 tially covered 205 



6. Massive gray hard sandstones, in part pecu- 

 liarly cross-bedded and undulating 23 



5. Shales and sandstones, not well exposed 12 



4. Hard greenish gray sandstone Avith shale 



partings 7 6 



3. Blue soft clay shales somewhat sandy below. 48 



2. Resistant massive blue quartzitic ledge 15 



1. Fine-grained gray sandstones and soft dark 



green sandy shale 34 5 



Total thickness 1791 



From the point where this section was concluded 

 northward, higher in the series, the greater portion of the 

 rocks is covered for some distance, certain hard ledges 

 only being exposed to view. These materials, however, 

 are seen to be of the same hard quartzite and resistant 

 white or gray sandstone as occurs below, alternating with 

 some dark clay shales and shaly sandstones, the mass as 

 a whole forming a formidable mountain (Walnut Moun- 

 tain) 2,100 feet high striking N. 70 "" E. many miles across 

 the country. 



Just what proportion of the Beech Creek section 

 should be assigned to the Jackfork formation and what 

 part to the Stanley is difficult to say. The two forma- 

 tions are conformable and continuous in deposition. In 

 general the sandstones. of the Stanley are dark greenish 

 gray in color and fine-grained while those of the Jackfork 

 proper are white and coarse-grained. On this basis one 

 would be inclined to place most of the Beech Creek sec- 

 tion in the Stanley, but certainly the uppermost 325 feet 

 at any rate belong to the Jackfork. Farther west, T. 4S., 

 R. 20E., one encounters the same difficulties of delimita- 

 tion. 



Paleontology. 



Organic remains in the Stanley shale are indeed 

 scarce. Wliy there should be so few in all this 6,000 feet 



