78 
KEITH. 
Millers cove are of a type often found in Tennessee. They 
resemble minutely the Rome sandstone (Knox of Safford), 
the Silurian Rock wood shale (Dyestone of Safford), and a 
bed in the Devonian Grainger shale west of Chilhowee. They 
also resemble as strongly the red shales pear Guide moun¬ 
tain and the red shales along Watauga river. In both the 
latter places the red shales are replacements of Knox dolo¬ 
mite, due to the proximity of shore during their deposition. 
At Guide mountain their equivalence is fairly well shown 
and their age is defined by the Middle Cambrian shales 200 
feet below them. Along Watauga river the geographic rela¬ 
tion to shore is well shown, as well as the geological fact of 
replacement of limestone by shale. The red shale increases 
toward shore until in places it entirely supplants the lime¬ 
stone. The abundance of ripple-marks demonstrates the 
shallowness* of the water at the time of deposition, and the 
identity of conditions in the Miller’s cove and Watauga areas 
is suggestive— i. e., quiet deposition of limestone locally af¬ 
fected by sand from neighboring lower Cambrian shores, 
and it has considerable weight in identifying the resultant 
formations. 
The presence of chert in the red shales replacing the 
Knox is the chief difference between them and other red 
shales; in the latter no chert occurs. Thus the chert, which 
is a constant feature of the Knox in spite of shore variations, 
is seen to be the chief lithologic feature of that horizon, 
and it must indicate a general condition during deposition. 
Its limitation to Knox and its occurrence in the Millers 
cove limestone, therefore, are good evidence that the latter is 
Knox. 
(i d ) The only remaining basis of comparison between the 
Cove limestone and other limestones—that of sequence—is 
limited by the small range of sequence in Millers cove. 
The deposit there has two members, cherty limestone and 
red shale, following an unconformity. This sequence occurs 
in part in the Lower and Middle Cambrian where the Rome 
sandstone follows a limestone. There, however, the lime- 
