Reference Type | Journal (article/letter/editorial) |
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Access Rights | Open Access |
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Title | Contributions to the mineralogy of Norway. No. 19. Red corundum of Froland at Arendal |
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Journal | Norsk Geologisk Tidsskrift [Norwegian Journal of Geology] | ISBN | 0029-196x |
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Authors | Oftedahl, Christoffer | Author |
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Year | 1963 | Volume | 43 |
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Page(s) | 431-440 | Issue | 4 |
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URL | |
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Download URL | https://njg.geologi.no/images/NJG_articles/NGT_43_4_431-440.pdf+ |
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Classification | Not set | LoC | Not set |
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Mindat Ref. ID | 16647888 | Long-form Identifier | mindat:1:5:16647888:4 |
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GUID | 91e1b9ca-1c7b-4d97-84d1-95728c3cdfec |
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Full Reference | Oftedahl, Christoffer (1963) Contributions to the mineralogy of Norway. No. 19. Red corundum of Froland at Arendal. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 43 (4) 431-440 |
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Plain Text | Oftedahl, Christoffer (1963) Contributions to the mineralogy of Norway. No. 19. Red corundum of Froland at Arendal. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 43 (4) 431-440 |
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In | (1963) Norsk Geologisk Tidsskrift [Norwegian Journal of Geology] Vol. 43 (4) Norsk Geologisk Forening |
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Abstract/Notes | Red corundum crystals occur in a two meter wide zone in the gneisses 11 km northwest of Arendal, Southern Norway. The ordinary features of the crystals are described, and Universal stage work indicates that the "lamellar twinning" is due to alteration on cleavages. It is suggested as an alternative hypothesis to "lamellar twinning and parting parallel to the rhombohedron" that corundum possesses true cleavage and pseudo-twinning due to alteration. |
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