| Locality type: | Mine |
| Classification |
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| Species: | 'Biotite' (not an IMA approved species) |
| Formula: | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Biotite data |
| Locality Data: | Click here to view Polly Randolph Mine, Yancey County, North Carolina, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 868830 |
| Long-form Identifier: | 1:3:868830:9 |
| GUID (UUID V4): | 495e4928-b4f1-4456-95e0-3d3973b61cb9 |
| References |
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| Reference Search (possible matching items) |
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 | | Report (issue) | | Carolina Geological Society 2008 Fieldtrip and Annual Meeting, Little Switzerland, North Carolina October...Spruce Pine Mining District: Little Switzerland, North Carolina __________________________________________...__ Carolina Geological Society (CGS) 2008 Field trip Spruce Pine Mining District North Carolina Co-leaders...Sponsors Active Minerals International, LLC Imerys North America Ceramics Unimin Corporation Vulcan Materials...Spruce Pine Mining District: Little Switzerland, North Carolina __________________________________________ |  | | Report (issue) | | Mica Deposits of the Blue Ridge in North Carolina GEOLOGICAL SURVEY PROFESSIONAL PAPER 577 Work done...done in part in cooperation with the North Carolina Department of Conservation and Development and in part...Administration Mica Deposits of the Blue Ridge in North Carolina By FRANK G. LESURE GEOLOGICAL SURVEY PROFESSIONAL... Work done in part in cooperation with the North Carolina Department of Conservation and Development... Geologic map of part of the Blue Ridge of North Carolina and Tennessee. 2-6. Maps showing location of |
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