File:Anorthosite.jpg
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Summary
[edit]DescriptionAnorthosite.jpg |
English: Igneous rocks form by the cooling & crystallization of hot, molten rock (magma & lava). If this happens at or near the land surface, or on the seafloor, they are extrusive igneous rocks. If this happens deep underground, they are intrusive igneous rocks. Most igneous rocks have a crystalline texture, but some are clastic, vesicular, frothy, or glassy.
Anorthosite is an scarce, coarsely-crystalline, intrusive igneous rock that is exclusively or near-exclusively composed of Ca-rich plagioclase feldspar. Minor amounts of blackish-colored pyroxene are usually present. Anorthosites are typically mottled light to medium to dark gray in color. Some have iridescent flashes of blue if the plagioclase feldspar mineral labradorite is present. Most anorthosites on Earth are Mesoproterozoic in age. Some famous anorthosite localities include the Adirondack Mountains of New York State, the southern Laramie Range of Wyoming, Labrador, and the Moon. |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/16602236679/ |
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@N05/16602236679. 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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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 05:57, 9 October 2020 | 807 × 680 (1.02 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/16602236679/ with UploadWizard |
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Pixel composition | RGB |
---|---|
Orientation | Normal |
Horizontal resolution | 600 dpi |
Vertical resolution | 600 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 17:49, 11 March 2015 |
Color space | Uncalibrated |
Image width | 807 px |
Image height | 680 px |
Date and time of digitizing | 13:48, 11 March 2015 |
Date metadata was last modified | 13:49, 11 March 2015 |