| Locality type: | Mine |
| Classification |
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| Species: | 'Plagioclase' (not an IMA approved species) |
| Formula: | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Confirmation |
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|
| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Plagioclase data |
| Locality Data: | Click here to view Big Mine, Alstead, Cheshire County, New Hampshire, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 653467 |
| Long-form Identifier: | 1:3:653467:7 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Plagioclase |
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|
|
| 1.2km (0.7 miles) | ⓘBurroughs beryl prospect, Alstead, Cheshire County, New Hampshire, USA |
| 1.3km (0.8 miles) | ⓘBlister Mine, Alstead, Cheshire County, New Hampshire, USA |
| 1.4km (0.9 miles) | ⓘBritton Quarry, Alstead, Cheshire County, New Hampshire, USA |
| 1.5km (0.9 miles) | ⓘFrench Mine, Alstead, Cheshire County, New Hampshire, USA |
| 2.4km (1.5 miles) | ⓘNichols Quarry, Gilsum, Cheshire County, New Hampshire, USA |
| 3.7km (2.3 miles) | ⓘKirk No. 2 Quarry, Gilsum, Cheshire County, New Hampshire, USA |
| 5.8km (3.6 miles) | ⓘWhite Quarry, Gilsum, Cheshire County, New Hampshire, USA |
| 6.4km (4.0 miles) | ⓘKirk No. 1 Quarry, Gilsum, Cheshire County, New Hampshire, USA |
| 16.5km (10.3 miles) | ⓘOsgood Graphite Mine, Nelson, Cheshire County, New Hampshire, USA |
| 28.3km (17.6 miles) | ⓘMonadnock Mountain, Jaffrey, Cheshire County, New Hampshire, USA |
| References |
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|
Cameron, Eugene N., Larrabee, David M., McNair, Andrew H., Page, James J., Stewart, Glen W., Shainin, Vincent E. (1954) Pegmatite Investigations, 1942-45, in New England. Geological Survey Professional Paper 255. US Geological Survey doi:10.3133/pp255 |
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