| Principal periods worked | 1900, 1932, WWII, 1955-56. |
|---|---|
| Workings | Cut 125, several adits, shaft 27, prospect pits. |
| Description of muscovite | Ruby, hard, clear, mineral inclusions |
| Production | Moderate sheet |
| Shape | Lens, pods |
| Size | 1-20 T |
| Strike | NE |
| Dip | NW., SE |
| Plunge | SW |
| Relation to wallrock | Partly concordant |
| Wallrock | Interlayered hornblende and biotite gneiss |
| Extent of weathering | Weathered |
| Remarks | Pl-P-Q-M-B pegmatite, medium grained; accessory garnet. |
| Source of information | USGS, DMEA |
| 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 |