File:Sandstones (Wasatch Formation, Paleocene to Lower Eocene; Black Rock, Leucite Hills, Wyoming, USA) 2 (48966419687).jpg
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Sandstones in the Tertiary of Wyoming, USA. Southwestern Wyoming's Leucite Hills are a group of Pliocene to Pleistocene volcanic centers that erupted lamproite lavas, a rare extrusive igneous lithology. Based on chemistry and mineral content, the Leucite Hills lamproite lavas have been categorized as wyomingite, orendite, or madupite. Volcanism in this area may possibly be due to Yellowstone Hotspot fringe melting of the mantle. The lamproites appear to be derived from lherzolite-harzburgite mantle rocks that were metasomatically enriched in phlogopitic veins at >1.2 Ga (the latter may be caused by Precambrian subduction along the Wyoming Craton margin). Seen here is a sandstone outcrop next to a Leucite Hills volcanic center called Black Rock, which is composed of olivine orendite lamproite. Stratigraphy: Wasatch Formation, Paleocene to lowermost Eocene Locality: northern flanks of Black Rock volcanic center, eastern Leucite Hills, Sweetwater County, southwestern Wyoming, USA |
| Date | |
| Source | Sandstones (Wasatch Formation, Paleocene to Lower Eocene; Black Rock, Leucite Hills, Wyoming, USA) 2 |
| 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@N05/48966419687 (archive). It was reviewed on 4 November 2019 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 | 14:21, 4 November 2019 | | 4,000 × 3,000 (9.97 MB) | Ainz Ooal Gown (talk | contribs) | Transferred from Flickr via #flickr2commons |
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