| Locality type: | Mine |
| Classification |
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| Species: | Dolomite |
| Formula: | CaMg(CO3)2 |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Dolomite data |
| Locality Data: | Click here to view Portland Mine, Bald Mountain Mining District (Portland Mining District), Lawrence County, South Dakota, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 382253 |
| Long-form Identifier: | 1:3:382253:1 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Dolomite |
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| 0.4km (0.3 miles) | ⓘBurlington and Golden Sands, Bald Mountain Mining District (Portland Mining District), Lawrence County, South Dakota, USA |
| 0.9km (0.5 miles) | ⓘClinton Mine, Trojan Mining District, Lawrence County, South Dakota, USA |
| 1.4km (0.9 miles) | ⓘTornado Mine (Golden Reward Group), Ruby Basin Mining District, Lawrence County, South Dakota, USA |
| 3.7km (2.3 miles) | ⓘBoscobel mine (Golden Reward group; Double Standard mine), Ruby Basin Mining District, Lawrence County, South Dakota, USA |
| 3.9km (2.4 miles) | ⓘStewart Mine (Steward Mine), Ruby Basin Mining District, Lawrence County, South Dakota, USA |
| 3.9km (2.4 miles) | ⓘGolden Reward Mine (Double Standard Mine), Ruby Basin Mining District, Lawrence County, South Dakota, USA |
| 6.5km (4.0 miles) | ⓘHomestake Mine, Lead, Lead Mining District, Lawrence County, South Dakota, USA |
| 9.7km (6.0 miles) | ⓘSilver Queen Mine (New Silver Queen Mine), Deadwood, Galena Mining District, Lawrence County, South Dakota, USA |
| 11.1km (6.9 miles) | ⓘBelle Eldridge Gold Mine (Deadwood Lead and Zinc Company Mine; Helen Gould Claim), Deadwood, Galena Mining District, Lawrence County, South Dakota, USA |
| 50.3km (31.3 miles) | ⓘBull Hill nepheline-syenite deposit (Bull Hill carbonatite; Bear Lodge carbonatite), Bear Lodge alkaline igneous complex, Crook County, Wyoming, USA |
| References |
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