| Locality type: | Mine |
| Classification |
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| Species: | Copper |
| Formula: | Cu |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Copper data |
| Locality Data: | Click here to view Henwood Mine (Douglass Houghton Mine), Winona, Greenland Township, Ontonagon County, Michigan, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 306172 |
| Long-form Identifier: | 1:3:306172:5 |
| GUID (UUID V4): | 96b82b06-d994-48fb-9db7-03c6de18ead9 |
| Nearest other occurrences of Copper |
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| 1.3km (0.8 miles) | ⓘWhat Cheer Mine, Winona, Greenland Township, Ontonagon County, Michigan, USA |
| 1.7km (1.1 miles) | ⓘFiresteel Mine, Winona, Greenland Township, Ontonagon County, Michigan, USA |
| 2.2km (1.4 miles) | ⓘIndiana Mine, Winona, Greenland Township, Ontonagon County, Michigan, USA |
| 3.2km (2.0 miles) | ⓘCherokee Mine (Cherokee Penn Mine; Dunn Mine), Winona, Greenland Township, Ontonagon County, Michigan, USA |
| 4.5km (2.8 miles) | ⓘAlgonquin Mine (Pennsylvania Mine), Ontonagon County, Michigan, USA |
| 4.8km (3.0 miles) | ⓘNorth Lake Mine, Ontonagon County, Michigan, USA |
| 6.1km (3.8 miles) | ⓘBelt Mine (Piscatauqua), Mass City, Ontonagon County, Michigan, USA |
| 6.9km (4.3 miles) | ⓘSouth Lake Mine (Aztec Mine), Mass City, Ontonagon County, Michigan, USA |
| 6.9km (4.3 miles) | ⓘLake Mine (Great Western Mine; Bohemian), Mass City, Ontonagon County, Michigan, USA |
| 6.9km (4.3 miles) | ⓘToltec Mine, Mass City, Ontonagon County, Michigan, USA |
| References |
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| Reference Search (possible matching items) |
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 | | Journal (article/letter/editorial) | | Porcelaneous Datolite in MichiganÕs Lake Superior Copper District Figure 1. A rare and beautiful yellow...nodule, 0.9 x 1.1 inches, recovered from the Hancock mine dump by John Perona in 1972. John Perona specimen...Jaszczak photo. rom the bowels of a Keweenaw copper mine to the icy depths of Lake Superior, serious datolite...combination. Imagine descending a steep 2,000-foot-deep mine shaft in the dead of a Keweenaw winter with only...over heels into the black depths of an abandoned mine. All of this effort was expended on clandestine |
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