File:Anorthosite ("Blue Eyes Granite") (Nain Anorthosite, Mesoproterozoic, 1.29-1.35 Ga; Ten Mile Bay Quarry, Labrador, Canada) 1.jpg
Anorthosite_("Blue_Eyes_Granite")_(Nain_Anorthosite,_Mesoproterozoic,_1.29-1.35_Ga;_Ten_Mile_Bay_Quarry,_Labrador,_Canada)_1.jpg (669 × 574 pixels, file size: 920 KB, MIME type: image/jpeg)
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Summary
[edit]DescriptionAnorthosite ("Blue Eyes Granite") (Nain Anorthosite, Mesoproterozoic, 1.29-1.35 Ga; Ten Mile Bay Quarry, Labrador, Canada) 1.jpg |
English: "Blue Eyes Granite" - coarsely-crystalline anorthosite from the Precambrian of Canada.
Anorthosites are uncommon intrusive igneous rocks almost exclusively composed of Ca-rich plagioclase feldspar. There’s usually a blackish pyroxene component as well. Anorthosites having labradorite plagioclase feldspar will display a wonderfully colorful iridescent play of colors (labradorescence). This makes them desirable decorative stones. All of the lightish to darkish gray material in the polished decorative stone surface shown above is labradorite - every crystal will flash bright blue when tilted at the correct angle in the light. This expensive decorative stone comes from the Ten Mile Bay Quarry, near the town of Nain along the Labrador coast, eastern Canada. The quarry exploits the Nain Anorthosite (Nain Plutonic Suite), a mid-Mesoproterozoic intrusion (1.29 to 1.35 billion years) emplaced along the Abloviak Shear Zone. |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/14812968312/ |
Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/14812968312. It was reviewed on 9 October 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
9 October 2020
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current | 05:57, 9 October 2020 | 669 × 574 (920 KB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/14812968312/ with UploadWizard |
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Horizontal resolution | 400 dpi |
Vertical resolution | 400 dpi |