| Locality type: | Occurrence |
| 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 Perkins Island beryl locality, Georgetown, Sagadahoc County, Maine, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 33660 |
| Long-form Identifier: | 1:3:33660:4 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Biotite |
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| 1.4km (0.9 miles) | ⓘTodd's Bay Quarry, Georgetown, Sagadahoc County, Maine, USA |
| 1.8km (1.1 miles) | ⓘHoward-Collins Quarry, Georgetown, Sagadahoc County, Maine, USA |
| 1.9km (1.2 miles) | ⓘCummings Quarry, Georgetown, Sagadahoc County, Maine, USA |
| 1.9km (1.2 miles) | ⓘConsolidated Feldspar Quarries, Georgetown, Sagadahoc County, Maine, USA |
| 3.0km (1.9 miles) | ⓘE. P. Thomas Quarry, Phippsburg, Sagadahoc County, Maine, USA |
| 3.5km (2.2 miles) | ⓘParker Head Quarry, Parker Head, Phippsburg, Sagadahoc County, Maine, USA |
| 10.5km (6.5 miles) | ⓘSmall Point, Phippsburg, Sagadahoc County, Maine, USA |
| 11.6km (7.2 miles) | ⓘDyer Cove, Harpswell, Cumberland County, Maine, USA |
| 16.4km (10.2 miles) | ⓘRoute 1 Road Cut, Woolwich, Sagadahoc County, Maine, USA |
| 21.6km (13.4 miles) | ⓘStandpipe Hill Quarries, Topsham, Sagadahoc County, Maine, USA |
| References |
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