| Locality type: | Quarry |
| Classification |
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| Species: | Calcite |
| Formula: | CaCO3 |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Calcite data |
| Locality Data: | Click here to view Twin Spings quarry, Twin Springs, Dubuque County, Iowa, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 570204 |
| Long-form Identifier: | 1:3:570204:6 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Calcite |
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| 6.9km (4.3 miles) | ⓘTimber Range Mine (Durango Drybone Mine; Old Ewing diggings), Durango, Dubuque County, Iowa, USA |
| 7.5km (4.6 miles) | ⓘBronson Mine, Durango, Dubuque County, Iowa, USA |
| 11.3km (7.0 miles) | ⓘLevens Mine (North Langworthy Mine), Dubuque, Dubuque County, Iowa, USA |
| 11.6km (7.2 miles) | ⓘBeadle Mine (Dubuque and Lake Superior Mine), Key West, Table Mound Township, Dubuque County, Iowa, USA |
| 11.7km (7.3 miles) | ⓘBrugh Mine (Amsden Mine), Dubuque, Dubuque County, Iowa, USA |
| 11.8km (7.4 miles) | ⓘStewart and Barlett Mine, Dubuque, Dubuque County, Iowa, USA |
| 12.0km (7.4 miles) | ⓘLevel Mine, Dubuque, Dubuque County, Iowa, USA |
| 12.0km (7.5 miles) | ⓘStewarts Cave Mine, Dubuque, Dubuque County, Iowa, USA |
| 12.9km (8.0 miles) | ⓘKilbourne Mine (Karrick and Jones Mine), Dubuque, Dubuque County, Iowa, USA |
| 13.7km (8.5 miles) | ⓘLangworthy and Kelly, Dubuque, Dubuque County, Iowa, USA |
| References |
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