212 PROCEEDINGS OF THE NATIONAL MUSEUAI. vol.11. 



employed by the same author also in the McMionville folio covering a 

 part of the eastern rim of the Central Basin. 



The Fort Payne chert seems to agree exactly with the Tullahoma of 

 Safford and Killibrew, as founded on exposures of the formation in the 

 eastern rim of the Central Basin. However, they used the name 

 Tullahoma also for all the beds between the Maury green shale and the 

 St. Louis limestone along the western edge of the basin, thus including 

 the Kinderhook shale, which is there locally developed beneath the 

 cherty beds. Hayes and Ulrich adopted the term in the latter sense in 

 the Columbia folio. From the foregoing it will be noted that there is 

 no Tennessee term which includes all of the Subcarboniferous rocks, 

 including the Chattanooga shale, forming the subject of the present 

 paper, namely, those underlying the Lithostrotion or St. Louis 

 limestone. Safford's subdivision ''Protean member" comes nearer to 

 covering this interval than any other, but this term has no geo- 

 graphical significance. As the St. Louis limestone of Tennessee 

 occasionally contains a Warsaw fauna in its basal layers, the under- 

 lying Subcarboniferous rocks will fall into the Mississippian Period, 

 as recently emended by Schuchert.* Newberry's Waverly group 

 covers the same interval, and I have used this term in the title of my 

 paper, first, because it has priority, and, second, because it requires 

 no revision of boundaries as is necessitated by Schuchert's proposed 

 restriction of the term Mississippian. 



It is true that Newberry was not the author of the term Waverly, 

 but I think it will be conceded that his writings form the most valu- 

 able contributions to the literature of the subject. By reference to 

 Weeks's ''North American Geologic Formation Names," ^ it will 

 be noted that the term Waverly was first applied by Mather, in 1838, 

 to the Subcarboniferous sandstone series in Ohio. Then Owen used 

 the term on two occasions in the early Indiana reports, regarding the 

 Knobstone group of that state as a synonym. The first defiriite 

 limits to the group were those given by the next writer upon the 

 subject, Newberry, who, in his "Report of Progress of the Ohio Geo- 

 logical Survey for 1869," included the Cuyahoga shale, Berea grit, 

 Bedford shale, and Cleveland shale as members of the Waverly group. 

 In all of Newberry's subsequent works, and, indeed, that of most sub- 

 sequent ^vriters upon the subject, these same divisions are recognized 

 in the Waverly group, although at times the separate divisions have 

 been designated as Waverly sandstone, Waverly shale, or Waverly 

 black slate. Excluding the Chattanooga shale, the term Waverlyan 

 is employed as a series term by Ulrich ^ to include deposits of Kin- 

 derhook, Burlington, and Keokuk age. 



1 Paleogeography of North America, Bull. Geol. Soc. Amer., vol. 20, 1910, p. 547. 



2 Bull. 191, U. S. Geol. Surv., 1902, p. 414. 



8 Prof. Paper, U. S. Geol. Surv., No. 36, 1905, p. 24. 



