273] B. Wade 75 



named above may be traced across the county by their con- 

 tained faunas and lithology, even though there are no sharp 

 lines of demarcation separating the one from the other. The 

 sediments of the Coon Creek horizon, which are described in 

 detail below, are quite variable, ranging from local lenses of 

 impure limestone through very fossiliferous marls to glau- 

 conitic sands and gypsiferous clays poor in fossils. The 

 overlying ferruginous clay horizon is sparsely fossiliferous 

 and extends across the county in a belt about three miles 

 wide. The McNairy sand member next above, which is 

 typically exposed in McNairy county, has been described by 

 Stephenson. 4 This member is essentially a sand and has 

 yielded few fossils. The so-called fucoid Halymenites major 

 Lesq. occurs sparingly. In 1915 leaves were collected from 

 near Selmer, Tenn., and Big Cut, Tenn., the type section for 

 this number. These have been submitted to Prof. E. W. 

 Berry for study. Above the McNairy sand and exposed 

 along southwestern McNairy County and southeastern Har- 

 din County is a fossiliferous horizon which may be traced 

 southward into Mississippi to Owl Creek, the type locality for 

 the Ripley formation. 



COON CREEK LOCALITY AND ITS STRATIGRAPHIC POSITION. 



The locality under immediate discussion may be known as 

 the Dave Weeks place on Coon Creek. It is in the north- 

 eastern part of McNairy County, 3% miles south of Enville 

 and 7% miles north of Adams ville and % mile east of the 

 main Henderson-Adamsville Road. The beds containing the 

 fossils are best exposed in the valley about two hundred and 

 fifty yards east of Dave Weeks' house along the headwaters of 

 Coon Creek. This is a small .stream flowing northward into 

 White Oak Creek, a tributary of the Tennessee River. 



Upper Cretaceous fossils have been previously collected 



4 Stephenson, L. W., U. S. Geological Survey, 1914, Prof. Paper 

 81, p. 22. 



