| Principal periods worked | WWII |
|---|---|
| Workings | Cut 40, stope 60 |
| Description of muscovite | Ruby, "A" structure, biotite intergrowths, ruled. |
| Production | Small sheet, feldspar. |
| Shape | Lenses |
| Size | 0.1-7 T, >90 L |
| Strike | NE |
| Dip | SE |
| Relation to wallrock | Concordant |
| Wallrock | Mica gneiss |
| Remarks | Pl-P-P-Q-M wall zones, medium to coarse-grained; accessory biotite, garnet, pyrite; Q-M core, discontinuous. |
| Source of information | USGS, CMC |
| 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 |