File:Vesicular andesite (Upper Pliocene, 1.9 Ma; Sierra Grande Shield Volcano, Raton-Clayton Volcanic Field, New Mexico, USA) 1.jpg
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English: Vesicular andesite from the Pliocene of New Mexico, USA. (7.3 centimeters across at its widest)
The Raton-Clayton Volcanic Field is an elongated, WNW-ESE trending, ~140 km-long lava & volcano field in northeastern New Mexico and southern Colorado. It consists of cinder cones, spatter cones, shield volcanoes, and fissure vents. Erupted materials range from mafic to intermediate to alkaline lavas (basalts, basaltic andesites, andesites, dacites, nephelinites, basanites). The largest volcano in the field is the Sierra Grande Shield Volcano. Shield volcanoes have a low, broad profile. The largest volcano on Earth is this type (Mauna Loa Volcano, Hawaii Hotspot), and the largest volcano in the Solar System is this type (Mt. Olympus Volcano, Olympus Hotspot, Tharsis region, Mars). The rock seen here is a vesicular andesite from the Sierra Grande Volcano. It consists of generally small phenocrysts of augite pyroxene, hypersthene pyroxene, olivine, and plagioclase in a glassy to microcrystalline groundmass of feldspar, pyroxenes, plus some other minerals. Age: upper Upper Pliocene, 1.9 Ma Locality: lava flow outcrop on the eastern side of Sierra Grande Shield Volcano, Raton-Clayton Volcanic Field, northwestern Union County, northeastern New Mexico, USA (36° 42’ 24.26” North latitude, 103° 47’ 46.75” West longitude) |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/14850724889/ |
| 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@N05/14850724889. It was reviewed on 19 June 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 | 08:32, 19 June 2022 | | 1,159 × 723 (585 KB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/14850724889/ with UploadWizard |
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