| Locality type: | Road Cutting |
| Classification |
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| Species: | Dolomite var: Iron-bearing Dolomite |
| Formula: | Ca(Mg,Fe)(CO3)2 |
| Comments: | The primary carbonate in crystals filling gash veins at the locality is ferroan dolomite. It was thought to be siderite but chemical analysis showed only a 10% siderite molecule, and the specific gravity was too low. (Anderson, John R. (1976). Collecting at the I-295 & I-495 Roadcut, Marlborough MA, Greater Boston Gem Mineral Show program guidebook) |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Iron-bearing Dolomite data |
| Locality Data: | Click here to view Interstate 290/Interstate 495 interchange road cuts, Marlborough, Middlesex County, Massachusetts, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 750005 |
| Long-form Identifier: | 1:3:750005:3 |
| GUID (UUID V4): | d88a2d2e-41e5-4dc7-9cde-e8f5ecc77d43 |
| Nearest other occurrences of Iron-bearing Dolomite |
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| 20.9km (13.0 miles) | ⓘPJ Keating Quarry (Lunenburg Quarry), Lunenburg, Worcester County, Massachusetts, USA |
| References |
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Interstate 290/Interstate 495 interchange road cuts, Marlborough, Middlesex County, Massachusetts, USA