| Locality type: | Quarry |
| Classification |
|---|
|
| Species: | 'Biotite' (not an IMA approved species) |
| Formula: | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Formation: | Primary |
| Comments: | Mostly as a component of the host metagabbro, but also as euhedral crystals in the open veins to about 1 cm. |
| Habit: | tabular |
| Colour: | black |
| Quality for species: | Good crystals or rich for species - important (!) |
| Confirmation |
|---|
|
| Validity: | Confirmed |
| Confirmation Methods: | SEM-EDS |
| Associated Minerals Based on Photo Data: |
|---|
|
| Quartz | 1 |
| Magnesite | 1 |
| Data |
|---|
|
| Mineral Data: | Click here to view Biotite data |
| Locality Data: | Click here to view Becker Quarry, Willington, Tolland County, Connecticut, USA |
| Data Identifiers |
|---|
|
| Mindat Occurrence Record ID: | 97384 |
| Long-form Identifier: | 1:3:97384:9 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Biotite |
|---|
|
|
| 17.7km (11.0 miles) | ⓘCordierite locality (Bigelow Pond), Union, Tolland County, Connecticut, USA |
| 23.7km (14.7 miles) | ⓘSturbridge Graphite Mine (Tantiusques Mine; Winthrop Lead Mine), Sturbridge, Worcester County, Massachusetts, USA |
| 27.9km (17.3 miles) | ⓘMonson quarries (Flynt quarries), Monson, Hampden County, Massachusetts, USA |
| 37.2km (23.1 miles) | ⓘLinkpot cut, Airline Railroad, East Hampton, Middlesex County, Connecticut, USA |
| 37.3km (23.2 miles) | ⓘLyman Viaduct at Dickinson Creek, Westchester, Colchester, New London County, Connecticut, USA |
| 40.0km (24.8 miles) | ⓘGreat Hill cobalt mines, Cobalt, East Hampton, Middlesex County, Connecticut, USA |
| 43.6km (27.1 miles) | ⓘWorth and Selden Quarries (Victoria Quarry), East Hampton, Middlesex County, Connecticut, USA |
| 44.5km (27.6 miles) | ⓘBailey prospect, East Hampton, Middlesex County, Connecticut, USA |
| 48.5km (30.2 miles) | ⓘArnold Granite Quarry (General Brainerd Quarry; Great Hill Quarry; Hazelton Quarry; Haddam Quarry; Brookes Quarry), Haddam, Middlesex County, Connecticut, USA |
| 48.8km (30.3 miles) | ⓘJail Hill Road locality (Jail Hill Quarry), Haddam, Middlesex County, Connecticut, USA |
| References |
|---|
|
|
|
Becker Quarry, Willington, Tolland County, Connecticut, USA