J. L. Smith—Corundum of North Carolina, ete. 181 
At this time there had been discovered but one detached 
block, but no other specimen could be found in that local- 
ity; There the matter rested until 1866, when ©. D. Smith 
(to whom I am indebted for valuable information contained in 
pounds. There is a difference in the cleavage and the associate 
minerals at different localities. 
_ In the development in North Carolina the corundum occurs 
in chrysolite or serpentine rocks, and outside of serpentine 1t 
has not been found. These chrysolite rocks belong to a regu 
lar system of dikes, which have been traversed for the distance 
of about one hundred and ninety miles. This system of dikes 
lies on the northwest side of the Blue Ridge, and has a strike 
parallel to the main mass of the ridge, and has an average dis- 
tance from the summit of the ridge of about ten miles. It con- 
tinues this strike to the head of the Little Tennessee River, say 
from Mitchell to Macon County, one hundred and thirty miles. 
Here the ridge curves around the head of the Tennessee and 
falls back about ten miles to the northwest. In conformity 
with this elbow in the ridge, the disturbing force shifts to the 
northwest and re-appears at Buck’s Creek, having the same rel- 
Which bears rose-colored garnets, cyanite, an Py 
its shifting to the right % occurs in hornblendic beds and 
gneiss. At Buck Creek and thence southwestward the horn- 
