CORUNDUM IN UNITED STATES. 131 
luiii ranging in size from small particles to masses of several pounds 
n weight are abundant, and many tons of this have been picked up 
md shipped. 
A little to the west of the south end of Nannies Mountain, about 
L| miles from the Rickard mine, there is a similar occurrence of corun- 
ium. There have been a number of shjillow^ cuts, ditches, and pits 
nade in prospecting for corundum, but apparently none was found 
n i^lace. The corundum that is found is often wrapped in mica. 
ALABAMA. 
The Appalachian crystalline belt passes inider the Cretaceous and 
ater sedimentary formations in the central part of the State near 
!^Iontgomery. Representatives of the peridotite belt have been found 
n the vicinity of Dudley ville, in Tallapoosa County, and corundum 
las been found in fragments on the surface both in this and Coosa, the 
id joining county on the west. No corundum has as yet been found in 
)lace, but it evidently originated in the peridotite rocks. Nothing 
hat indicates a workable deposit has been found in the State. 
VIRGINIA. 
The only records that could be found show corundum to have been 
'ound in only two localities in the State. The first is a large dee]:)- 
)lue crystal found in Louisa County by Mr. Louis Zimmer, and 
•eported by Mr. George F. Kunz." The second is that described by 
3octor Genth in 1890, from Patrick County, and noted above on 
)age 55. The peridotite belt is continued through the State by a 
^reat number of talc and serj)entine rocks, but no corundum has been 
•eported from any of these localities. 
PENNSYLVANIA. 
The serpentine belt that comes diagonally across Maryland is con- 
inued through the counties of Lancaster, Chester, Delaware, Mont- 
gomery, and Bucks in Pennsylvania. Corundum is found associated 
vith it in many places, especially in Chester and Delaware counties, 
md, a few years ago, was mined to some extent in Chester County, 
't is found here in chloritic zones about the serpentine, and in larger 
miounts in granular albite, much like the occurrence in feldspar 
.^eins at Buck Creek, in Clay County, N. C. It is near the contact of 
;he serpentine with the gneiss. 
Zones of chloritic minerals along the borders of the serpentine 
nasses and in the larger joints are constantly present in these corun- 
lum localities, and chromite is found in the mass of the serpentine 
"Mineral Resources U. S. for 1883-84, U. S. Geol. Survey, 1885, p. 735. 
