File:Burrow in lignite coal (Sentinel Butte Formation, Paleocene; Painted Canyon, Little Missouri Badlands, North Dakota, USA) 1.jpg
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| Description |
English: Lignite coal & mudrocks in the Tertiary of North Dakota, USA.
These are Paleocene-aged, nonmarine sedimentary rocks. The surrounding landscape has been weathered and eroded into badlands topography. The gray material is weathered and slumped mudrocks. The black area at center is a mammal burrow. The black material at the mouth of the burrow consists of crumbs of lignite coal. Lignite is a low rank of coal - it is lightweight, brown to black colored, soft, friable, sooty, may have visible plant fragments, and burns in a fire (it's a fossil fuel). It crumbles when dried out and can spontaneously ignite. Compositionally, lignite coal has 25 to 35% carbon content. Lignite is sooty-burning; relatively little heat is generated compared with higher ranks of coal. Stratigraphy: Sentinel Butte Formation, Upper Paleocene Locality: outcrop along Painted Canyon Trail, Little Missouri Badlands, Roosevelt National Park, western North Dakota, USA Info. at: en.wikipedia.org/wiki/Lignite |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/51845512993/ |
| 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@N05/51845512993. It was reviewed on 17 February 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 17:34, 17 February 2022 | | 3,008 × 2,000 (6.31 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/51845512993/ with UploadWizard |
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