File:Lugarite (Lugar Sill, Early Permian, 288 Ma; near Lugar, Ayrshire, Scotland) 12.jpg

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Description
English: Lugarite from the Permian of Scotland.

Lugarite is an extremely rare intrusive igneous rock having an alkaline chemistry and a porphyritic texture. It is only known from one locality: the Lugar Sill near the town of Lugar, Scotland. The unit contains alkaline mafic rocks and ultramafic rocks.

The prominent black, elongated phenocrysts in this lugarite sample are kaersutite amphibole. Other minerals present in this material include titanaugite, nepheline, analcime, and labradorite feldspar.

Geologic unit: Lugar Sill, Sakmarian Stage, Early Permian, 288 Ma

Locality: Logan-Lugar-Cronberry area, Ayrshire, southern Scotland

Many thanks to the donor of this fine specimen!

See info. at:

www.alexstrekeisen.it/english/pluto/lugarite.php
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Source https://www.flickr.com/photos/47445767@N05/50595500116/
Author James St. John

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/50595500116. It was reviewed on 15 November 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

15 November 2020

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current11:37, 15 November 2020Thumbnail for version as of 11:37, 15 November 20203,876 × 2,930 (7.76 MB)Ser Amantio di Nicolao (talk | contribs)Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50595500116/ with UploadWizard

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