182 J. L. Smith—Corundum of North Carolina, ete. 
blende beds assume very large proportions, and instead of com- 
mon feldspar have in them albite, making an albitic syenite. 
At Buck Creek (which is named Cullakenih) the chrysolite 
covers an area of about three hundred and fifty acres. One or 
two observers have fallen into the error of confounding the two 
dike systems, whereas they have no connection whatever. Ac- 
cording to them the northern system cuts through the Blue 
Ridge at rightangles, and then turns back on the opposite side 
of the ridge. Now there are no such phenomena connect 
with these outcrops. They evidently belong to separate sys- 
tems. The outcrops along the northern system occur at inter- 
vals ranging from one to fifteen miles. The belt or zone along 
which these outcrops occur never exceeds four miles in width 
on the northern side of the ridge. On the opposite side the 
system is not so well defined, and the outcrops are rarer. 
Upon these serpentine beds there exists chalcedon , chro- 
mite on some of them, chlorite, tale, steatite, anthophyllite, 
tourmaline, emerylite, epidote on some of them, zoisite, and 
albite, with occasionally asbestus and picrolite, as also actinolite 
and tremolite. e corundum at some places seems to occur 
mostly in ripidolite in fissures of the serpentine. At Cullakenih 
um with its immediate associates is in chlorite, eX 
cept the red variety, which is in zoisite, containing a minute 
quantity of chrome. 
Throughout all the range of rocks for the great extent re 
ferred to, corundum forms a geognostic mark of this chrysolite- 
rock, just as it does of the calcareous rock bearing corun um 
described by me in Asia Minor. They belong to the same 
geological epoch, and overlie the gneiss. 
e closest investigation shows that the chrysolite in North 
Carolina takes the place of cale-rock in Asia Minor; that these 
directly the Ree rocks; and both of them are also ident 
cal geologica 
s. In all cases, however, the masses of corundum give 
evidence of having been formed by a process of segregatiom 
