80 
KEITH. 
The second, that of lithologic similarity, is of very little 
value when unsupported, as it is here. The evidence seems 
decidedly to favor the identity of the Knox and Cove lime¬ 
stone. 
VI. (a) In the preceding pages the discussion has turned 
on the relations of the Cove limestone to similar rocks out¬ 
side the faults of Chilhowee, in order to discover the age of 
the'Cove limestone. The knowledge of this is, of course, 
essential to a final application to Appalachian history of the 
contact relations of the limestone and the Chilhowee group. 
It is the belief of the author that the evidence fully warrants 
correlation of Knox dolomite and the Cove limestone. In 
the rest of the paper the exact nature of the contact relations 
will be considered and the results applied to the larger field 
of the Appalachians. 
The most interesting feature of the geology of Millers 
cove is the contact between the limestone and the Chilhowee 
formation. This is represented on the accompanying map 
by a heavy black line, and follows the outline of the cove 
quite closely. On casual examination the sequence through 
the Chilhowee beds and limestone seems to be unbroken, but 
the details of the contact show wide differences in adjacent 
sections. It is not always the same part of the Chilhowee 
sandstone that touches the limestone or the same part of the 
limestone that touches Chilhowee. This feature appears 
plainly in the accompanying map and sections. The posi¬ 
tion of each section on the map is indicated by black lines 
lettered to correspond with the sections. The longitudinal 
section K is derived from sections A to H. Section M is de¬ 
rived from section K by reducing the folds shown in the lime¬ 
stone to a level. 
In the limestone the position of the contact has a vertical 
range of 1,200 feet; in the sandstone, of 1,000 feet. In a 
general way these differences complement each other, so that 
where the limestone is thinnest the sandstone is thickest, and 
vice versa. In fact, the limestone and part of the sandstone 
appear to have the same vertical horizon and to replace 
each other. 
