File:Independent Dike (gilsonite dike in the Uinta Formation, Middle Eocene; Bonanza, Utah, USA) 1.jpg
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| Description |
English: Gilsonite (uintaite) dike in the Tertiary of northeastern Utah, USA.
Gilsonite (a.k.a. uintaite) is a variety of asphaltite - it's a solid hydrocarbon - basically solidified oil. Gilsonite usually has the appearance of obsidian or anthracite coal. It is jet black in color, very lightweight, brittle, and has a conchoidal fracture. The largest “deposits” of gilsonite in the world are in the Uinta Basin of northeastern Utah, USA. Gilsonite occurs there as vertical NW-SE trending veins intruded within the Eocene-aged Uinta Formation. The source of the hydrocarbons is organic-rich beds in the underlying Green River Formation (Eocene) and Wasatch Formation (Paleocene). Gilsonite is not readily combustible and is not a fuel, but it does have economic value. Gilsonite is mined in northeastern Utah and processed and is used in numerous products and applications (e.g., see: www.geospectra.net/kite/gilsonite/gilson.htm). The above photo shows a mined-out gilsonite dike (Independent Dike, also known as the Big Bonanza Vein) intruding the Uinta Formation. The dike was probably emplaced ~10 to 30 million years ago. Locality: gilsonite mining operation on the northwestern side of the town of Bonanza, eastern Uintah County, northeastern Utah, USA (40° 01’ 25.62” N, 109° 10’ 57.77” W) |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/25568715272/ |
| 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@N05/25568715272. It was reviewed on 18 October 2020 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 | 02:43, 18 October 2020 | | 4,286 × 2,725 (3.28 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/25568715272/ with UploadWizard |
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