File:Rhyolitic pumice (Bishop Tuff, Pleistocene, 760 ka; Sherwin Summit, Owens Valley, California, USA) 1.jpg
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English: Rhyolitic pumice in the Pleistocene of California, USA.
Pumice is a felsic, frothy-textured, extrusive igneous rock. It is light colored and quite lightweight - most specimens float in water. Seen here is rhyolitic pumice that has eroded from a volcanic unit in California called the Bishop Tuff (it's not really a volcanic tuff, however). The Bishop Tuff is a ~760,000 year old deposit emplaced during a caldera-forming eruption of the nearby Long Valley Volcano. The unit consists of ash, air-fall pumice, and pyroclastic flow pumice. Locality: Sherwin Summit (= Big Pumice Roadcut) - roadcut along the northern side of Route 395, immediately east of intersection with Lower Rock Creek Road (= Sherwin Grade; = Old Route 395), just east of the “town” of Tom’s Place, Owens Valley, Mono County, eastern California, USA (37° 33' 28.80" North latitude, 118° 39' 26.23" West longitude) |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/49088574226/ |
| 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@N05/49088574226. It was reviewed on 22 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 | |
|---|---|---|---|---|---|
| current | 19:04, 22 October 2020 | | 3,008 × 2,000 (5.05 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/49088574226/ with UploadWizard |
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