88 
KEITH. 
These scattered instances of folding were, in all probability, 
tlie local reliefs of strain at early stages of a general com¬ 
pression, and similar small folds may be expected elsewhere. 
It appears plain that there was no general deformation before 
the deposition of Knox dolomite, and that the movement 
was mainly a simple uplift. 
VIII. The date of the post-Chilhowee unconformity in 
Millers cove depends on the age of the limestone there, as 
has been said. Independent of that, however, two facts stand 
out—erosion of Chilhowee sandstone at some date and ab¬ 
sence of later Cambrian beds on the Chilhowee. If the two 
are the same, then the age of the erosion interval is well 
defined; if they are not, then the Chilhowee-Knox interval, 
a single one along most of the shore, was interrupted at 
Millers cove by a long period of quiet deposition. 
From the evidence herein discussed it is probable that the 
interval was a single one along the whole Tennessee shore 
and far into Virginia. The announcement of this interval 
is new, I believe. It certainly is new in that it ascribes the 
interval to erosion and deformation, and it opens an entirely 
new page in Appalachian geology. By it the disturbances 
that culminated in Appalachian folding and uplift are shown 
to have begun after the deposition of the first Palsezoic beds 
instead of the last, as usually supposed. 
