File:Granite dike 2.jpg

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English: Igneous dikes are planar to irregularly-planar igneous intrusions that cut across country rocks. They can be thin or extremely thick & they can be vertical or obliquely-oriented. Dikes are composed of various lithologies - examples include granite, pegmatite, aplite, andesite, basalt/diabase, lamprophyre, minette, rhyolite. In this specimen, the igneous dike is composed of granite, a felsic, phaneritic, intrusive igneous rock dominated by the minerals quartz (= grayish) and potassium feldspar (= pinkish-orangish-reddish). The pistachio green mineral is epidote.
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Source https://www.flickr.com/photos/47445767@N05/52907591206/
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@N05/52907591206. It was reviewed on 23 May 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

23 May 2023

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current21:13, 23 May 2023Thumbnail for version as of 21:13, 23 May 20232,983 × 2,269 (5.07 MB)Ser Amantio di Nicolao (talk | contribs)Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/52907591206/ with UploadWizard

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