130 CORUNDUM, ITS OCCURRENCE AND DISTRIBUTION. 
Track Roch mine. — The location of this mine is in the northeaster 
part of Union County, Ga., on the south side of Track Rock Gaj 
The corundum occurs in a peridotite formation, Avhich is very mucJ 
decomposed on the surface, there being very little visible but a mas 
of chlorite-schist containing more or less actinolite. A tunnel, hav 
ing its upper end 75 feet below the surface, has been run in on th 
formation for about 200 feet, with short branching tunnels at severa 
points. From the material cut through by the tunnel, which wa 
examined by Mr. King,« of the Georgia Geological Survey, the rod 
was found to be an altered peridotite, made up of small grains o 
chrysolite surrounded by actinolite and containing many grains o 
magnetite. It may be that the original of this rock was the peridotite 
amphibole-picrite. 
All the work that has been done at this mine has been entirely 
within the formation, and the best results would be obtained near tin 
contact of this rock with the surrounding country rock. 
Foster mine. — This mine, which is located in the northeastei'u par I 
of Towns County, Ga., just over the North Carolina line, lias beei 
described with the other mines occurring in this vicinity under th( 
head of " Corundum in North Carolina," on page 123. The corundun 
occurs in a quartz-schist, and the property is owned by the Corundun 
Mining and Manufacturing Company, of Philadelphia, Pa. 
SOUTH (;arol 1 n a . 
Corundum is found in Laurens, iVnderson, Oconee, York, and Spar- 
tanburg counties. The western portion of this State is in the line oil 
peridotites as indicated by the direction of the belt in Georgia and 
North Carolina, and these rocks are known to exist along the border 
in the northwestern corner; but no work has been done to trace out 
their distribution nor to develop the corundmn deposits, if such exist 
In the northeastern part of York County, from 3 to 1 miles west ol 
the Catawba River, on the land between Allison and CroAvder creeks 
corundum has been found in a belt about 200 to 300 yards Avide which 
skirts aloiig the western slopes of Nannies Mountain. This localit\- 
is about 12 miles northeast of Yorkville, S. C, and 25 miles southwest 
of Charlotte, N. C. 
Mining operations have been carried on at two distinct portions oi 
this belt, one a mile north of the summit of Nannies Mountain, on the 
property of Alexander Rickard. The work done here consists of a 
shaft about 35 feet deep, from Avhich several drifts have been run. 
which penetrate AA-hat is probably a light-gray granite, but it is much 
decomposed and of a sandy constitution. The only solid materials 
encountered Avere irregular masses of black, cleavable corundum asso- 
ciated with muscovite mica. In the surrounding fields float corun- 
« Bull. Geol. Survey Georgia No. 2, 1894, p. 93. 
