File:Peacock coal.jpg
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Size of this preview: 800 × 532 pixels. Other resolutions: 320 × 213 pixels | 640 × 426 pixels | 1,024 × 681 pixels | 1,280 × 851 pixels | 3,008 × 2,000 pixels.
Original file (3,008 × 2,000 pixels, file size: 1.63 MB, MIME type: image/jpeg)
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Summary[edit]
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English: This sample is of peacock coal. Peacock coal is not a specific class of coal, but rather the name for an effect in which oxidizing materials in the coal create a dazzling array of colors on the surface of the coal. Usually it is short-lived, as the material fully oxidizes away shortly after exposed to air. |
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| Source | https://www.usgs.gov/media/images/peacock-coal | |||
| Author | Donna Pizzarelli, USGS | |||
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Licensing[edit]
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This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.
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This file, which was originally posted to an external website, has not yet been reviewed by an administrator or reviewer to confirm that the above license is valid. See Category:License review needed for further instructions.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:51, 3 December 2020 | | 3,008 × 2,000 (1.63 MB) | Alex Cohn (talk | contribs) | Uploaded a work by Donna Pizzarelli, USGS from https://www.usgs.gov/media/images/peacock-coal with UploadWizard |
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