Principal periods worked | 1925, WWII |
---|---|
Workings | 7 cuts, stopes, adit, inclines, in the area 100 by 450. |
Description of muscovite | Reddish-brown, clear, biotite intergrowths. |
Production | Large sheet |
Shape | Lenses |
Size | >1-12 T, >110 L. |
Strike | NE |
Dip | SE |
Plunge | S |
Relation to wallrock | Concordant |
Wallrock | Interlayered hornblende and biotite gneiss |
Remarks | Pl-Q-M-B pegmatite, medium to coarse grained; accessory allanite, apatite, garnet. |
Source of information | USGS, OF |
WWI | World War I |
WWII | World War II |
int | intermittent |
Small | < 500 lb |
Moderate | 500-10,000 lb |
Large | > 10,000 lb |
D | depth |
L | length |
T | thickness |
avg | average |
B | biotite |
F | feldspar |
M | muscovite |
P | perthite |
Pl | plagioclase |
Q | quartz |
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 |