| Locality type: | Mine |
| Classification |
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| Species: | Natrolite |
| Formula: | Na2Al2Si3O10 · 2H2O |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Natrolite data |
| Locality Data: | Click here to view Isle Royal Mines, Portage Township, Houghton County, Michigan, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 400932 |
| Long-form Identifier: | 1:3:400932:0 |
| GUID (UUID V4): | 249b0311-7d56-4a80-9b61-d4f99c690f18 |
| Nearest other occurrences of Natrolite |
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| 17.3km (10.7 miles) | ⓘOsceola Mine, Osceola, Calumet Township, Houghton County, Michigan, USA |
| 24.7km (15.4 miles) | ⓘAllouez Mine, Allouez, Allouez Township, Keweenaw County, Michigan, USA |
| 28.9km (18.0 miles) | ⓘSeneca No. 1 Shaft, Seneca Mine, Seneca, Allouez Township, Keweenaw County, Michigan, USA |
| 28.9km (18.0 miles) | ⓘMohawk Mine, Mohawk, Allouez Township, Keweenaw County, Michigan, USA |
| 30.0km (18.6 miles) | ⓘSeneca No. 2 shaft (Gratiot Mine), Seneca Mine, Seneca, Allouez Township, Keweenaw County, Michigan, USA |
| 36.6km (22.7 miles) | ⓘCliff Mine, Allouez Township, Keweenaw County, Michigan, USA |
| 39.8km (24.7 miles) | ⓘPhoenix Mine, Phoenix, Houghton Township, Keweenaw County, Michigan, USA |
| 40.4km (25.1 miles) | ⓘSt. Clair Mine, Phoenix, Houghton Township, Keweenaw County, Michigan, USA |
| 41.3km (25.7 miles) | ⓘGarden City Mine, Phoenix, Houghton Township, Keweenaw County, Michigan, USA |
| 44.4km (27.6 miles) | ⓘArnold Mine, Copper Falls, Eagle Harbor, Keweenaw County, Michigan, USA |
| References |
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| Reference Search (possible matching items) |
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 | | Report (volume) | | Data Huber, Norman King 1926The geologic story of Isle Royale National Park. (Geological Survey Bulletin...64-66 Supt.of Docs. No.: 119.3:1309 1. Geology-Michigan-Isle Royale National Park-Guide-books. I. Title....rocks are stacked up___ ____ A volcanic pile the Portage Lake Volcanics ______ Rock Harbor-Tobin Harbor...________ Tilting and breaking the rocks _____________ Isle Royale a small piece of the big puzzle ____ What...there before the pre-Keweenawan ____ The rocks of Isle Royale the Keweenawan ______ The missing chapters |  | | Journal (issue) | | . . . . 3.50 C•ppar wlu11cl I■ Calcite xis., Michigan. Fair quality. 2 ½ x I ½ . . . . . 2.50 C.rlBiniN... fancy sapphire (which would involve no larger mines are developed and run by ' the reduction in value)...Calcutta is in the middle of a huge six of the mines. These were selected as : an ficial Bood-plain or...electrical industry. I was lucky the dike. The mines are first developed l in• enough to secure a letter...further 80% baits There are hundred-. of producing mines, or so by weight goes to the scrap heap. This final |
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