Falls mine

Mica Mine in Mitchell county, North Carolina, this site also known as Arnold Rock, Charlie Hole

Falls (Arnold Rock Charlie Hole) mine

Principal periods worked WWII, 1950's
Workings 2 cuts 100 and 40
Description of muscovite Greenish brown, reeved,, bent, cracked, small.
Production Feldspar
Shape Tabular
Size 25-30 T, 250 L
Strike E
Dip 0-45° S
Relation to wallrock Concordant
Wallrock Mica gneiss
Extent of weathering Unweathered
Remarks P-Pl-Q-M pegmatite, medium to coarse grained; graphic texture common; accessory biotite, garnet, apatite.
Source of information USGS

Geographic context


Principal periods worked
WWI World War I
WWII World War II
int intermittent
Small < 500 lb
Moderate 500-10,000 lb
Large > 10,000 lb
Size of pegmatite
D depth
L length
T thickness
avg average
Internal structure
B biotite
F feldspar
M muscovite
P perthite
Pl plagioclase
Q quartz
Source information
CMC Colonial Mica Corporation
DMEA Defense Minerals Exploration Administration
OME Office of Minerals Exploration
USGS U.S. Geological Survey
OF USGS open-file reports and maps