Beech Bottom mine

Mica Mine in Avery county, North Carolina, this site also known as Jackson

Beech Bottom (Jackson) mine

Principal periods worked Pre-WWII
Workings 3 cuts, 125 short adits, shafts (reported 160 deep).
Description of muscovite Muscovite rare
Production Large feldspar
Size Large
Wallrock Interlayered hornblende and biotite gneiss
Remarks Pl-P-Q pegmatite, medium grained; accessory muscovite.
Source of information USGS

Geographic context

Abbreviations

Principal periods worked
WWI World War I
WWII World War II
int intermittent
Production
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