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Summary
| Description |
Villiaumitic lujavrite (~1.75 cm across) from the Precambrian of Greenland. This is a rare intrusive igneous rock with a bizarre name: villiaumitic lujavrite. The dark gray rock itself is lujavrite, a variety of nepheline syenite having amphibole, aegirine pyroxene, nepheline, and feldspar. The red spots in the rock are crystals of the the rare halide mineral villiaumite (NaF - sodium fluoride). Geologic unit & age: Illímaussaq Complex (Illímaussaq Intrusion; Illímaussaq Alkaline Complex), late Mesoproterozoic, 1.16 Ga Locality: Kvanefjeld, southern Greenland |
| Date | |
| Source | Villiaumitic lujavrite (Illímaussaq Complex, late Mesoproterozoic, 1.16 Ga; Kvanefjeld, southern Greenland) 4 |
| Author | James St. John |
| Other versions | More photos of this specimen |
Licensing
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/15177146800. It was reviewed on 27 September 2014 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:26, 27 September 2014 | | 2,744 × 2,948 (3.62 MB) | Tillman | Transferred from Flickr via Flickr2commons |
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