| Locality type: | Mine |
| Classification |
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| Species: | 'Hornblende Root Name Group' (not an IMA approved species) |
| Formula: | ◻Ca2(C42+C3+)(AlSi7O22)W2 |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Hornblende Root Name Group data |
| Locality Data: | Click here to view Gap Mine, Bart Township, Lancaster County, Pennsylvania, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 975853 |
| Long-form Identifier: | 1:3:975853:7 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Hornblende Root Name Group |
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| 31.4km (19.5 miles) | ⓘKeystone Trap Rock Quarry, Cornog, Wallace Township, Chester County, Pennsylvania, USA |
| 33.7km (21.0 miles) | ⓘHopewell Mines, Warwick (Saint Marys), Warwick Township, Chester County, Pennsylvania, USA |
| 34.9km (21.7 miles) | ⓘWarwick Mines, Warwick (Saint Marys), Warwick Township, Chester County, Pennsylvania, USA |
| 40.0km (24.9 miles) | ⓘFrench Creek Mines, Saint Peters, Warwick Township, Chester County, Pennsylvania, USA |
| 40.8km (25.4 miles) | ⓘOsborne Hill, Birmingham Township, Chester County, Pennsylvania, USA |
| 41.4km (25.7 miles) | ⓘPort Deposit Quarry (Port Deposit Granite Company), Cecil County, Maryland, USA |
| 43.1km (26.8 miles) | ⓘMount Cuba serpentinite, New Castle County, Delaware, USA |
| 43.6km (27.1 miles) | ⓘCornwall Mines (Cornwall Iron Mine), Cornwall Borough (Cornwall), Lebanon County, Pennsylvania, USA |
| 52.1km (32.4 miles) | ⓘWilmington Granite Company Quarries, Wilmington, New Castle County, Delaware, USA |
| 54.7km (34.0 miles) | ⓘLenni, Middletown Township, Delaware County, Pennsylvania, USA |
| References |
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Gap Mine, Bart Township, Lancaster County, Pennsylvania, USA