File:Xenolith (Half Dome Granodiorite, Late Cretaceous, 89-93 Ma; outcrop next to Tenaya Lake, Yosemite National Park, California, USA) 1.jpg
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| Description |
English: Xenolith in granodiorite in the Cretaceous of California, USA.
Xenoliths are pieces of rock that have fallen from the walls or roof of a cooling magma chamber, or have become entrained in rising masses of magma ("xeno" means "foreign" and "lith" means "rock"). Xenoliths can occur in intrusive igneous rocks or extrusive igneous rocks (= volcanic lava). The host rock here is part of an extensive, Cretaceous-aged intrusive complex in eastern California called the Sierra Nevada Batholith. The complex consists of numerous individual plutons, many of which are old, cooled magma chambers that were originally beneath ancient subduction zone volcanoes. Geologic unit: Half Dome Granodiorite, Sierra Nevada Batholith, Late Cretaceous, 89 to 93 Ma Locality: outcrop next to Tenaya Lake, Yosemite National Park, Sierra Nevada Mountains, eastern California, USA |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/50036315652/ |
| 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@N05/50036315652. It was reviewed on 13 October 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| current | 00:47, 13 October 2020 | | 3,008 × 2,000 (5.13 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50036315652/ with UploadWizard |
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