Principal periods worked | WWII (?) |
---|---|
Workings | Cuts, adit, stope, prospect pits in the area 100 by 200. |
Description of muscovite | Green, hard, mineral inclusions, cracked, bent. |
Production | Moderate sheet? |
Shape | Tabular |
Size | 1-3 T |
Strike | NE |
Dip | SE |
Relation to wallrock | Concordant |
Wallrock | Mica gneiss |
Remarks | Pl-Q-M pegmatite, find to medium grained; accessory sericite, garnet. |
Source of information | USGS |
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 |