| Principal periods worked | 1920, WWII |
|---|---|
| Workings | Opencuts, inclines, drifts for 300 along strike. |
| Description of muscovite | Green, "A" structure, cracked, bent, concentrated near core; Brown, bent, cracked, stained, concentrated along hanging wall, footwall, and in footwall rolls. |
| Shape | Pinch and swell. |
| Size | 0.5-8 T >300 L |
| Strike | NW |
| Dip | NE |
| Relation to wallrock | Partly concordant |
| Wallrock | Mica gneiss |
| Extent of weathering | Unweathered |
| Remarks | Pl-Q-M wall zone, fine to coarse grained; Q core. Platy structure and deformed mica common. Some kyanite in wallrock. |
| 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 |