418 E. O. ULRICH REVISION OF THE PALEOZOIC SYSTEMS 



the southern margin. The fauna of the Gratz is much like that of 

 the Hermitage. Both probably entered the continental, basins through 

 the Mississippi embayment, though the Gratz phase is wholly unknown 

 (probably concealed by overlapping later deposits) south of northern 

 Kentucky. 



Except that it was followed by more general emergence, the attitude 

 of the Cincinnati dome remained nearly the same as in the Gratz stage 

 to the latter part of the Eden. The last of the Utica (Fulton shale), 

 overlapping from the north, extends a short distance over the northern 

 flank of the dome and rests with slight local unconformity on the Gratz. 

 Submergence continuing, the overlying shales lap farther and farther 

 southward, the last of the Eden having possibly covered the whole of 

 the present dome. During most of the succeeding Maysville stages the 

 whole of the Cincinnati uplift seems to have been almost evenly sub- 

 merged. At any rate, no decided tilting of its surface is suggested by 

 the known distribution of the formations of this group. 



Very similar north and south tilting of the Nashville dome is clearly 

 indicated by evidence already in hand, but details remain to be worked 

 out. Considerable progress, however, has been made in determining the 

 east and west oscillations, which seem to have been of greater consequence 

 in the stratigraphic history of this dome. In comparing the sections 

 on the east and west flanks it is found that the Lebanon limestone of 

 the Stones River group is about equally well developed on both sides, 

 though probably absent locally on the northwest side. At any rate, the 

 Lebanon has not been recognized in the Wells Creek uplift, in which 

 older deposits come to the surface. The succeeding Carter limestone, 

 however, is found only on the west side, while the Lowville is seen only 

 on the east, north, and south sides. The Kimmswick again is absent on 

 the east flank, but is locally present on the west margin. Next comes the 

 Hermitage, which is found on both sides and probably encircles the 

 dome. The Wilmore formation of the Kentucky section is unknown in 

 Tennessee, but the Bigby, which follows it in time, occurs, like the 

 Hermitage, on both sides. Nearly 200 feet of limestone, forming the 

 middle two-thirds of the Cannon limestone, follows the Bigby on the 

 east side, but is entirely unknown on the west margin. The succeeding 

 Catheys formation again has a more general distribution, being found 

 wherever the Bigby and Hermitage occurred before it. The shales of 

 the Eden group are unknown in middle Tennessee, but the Leipers for- 

 mation, which is essentially the same as the lower two-thirds of the 

 Maysville in the Cincinnati region, is well developed on the north and 

 west sides, though absent along the greater part of the eastern border. 



