File:Vesicular lava (July-August 2001 eruption of Mt. Etna, eastern Sicily) 1.jpg
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| Description |
English: Mt. Etna is a regularly-erupting volcano along the eastern margin of Sicily, a large Mediterranean island offshore from southern Italy. Generally, Etna's eruptions are strombolian in style and spectacularly gorgeous, especially when viewed at night (e.g., www.flickr.com/photos/fabriziozuccarello/50953312297/in/p... ). Etna is also famous for blowing smoke rings (e.g., www.flickr.com/photos/volcanoes/10842987365/in/photostrea... ).
Much of Etna's erupted material is trachybasalt. Trachybasalt has the same general physical, chemical, and mineralogical characteristics as basalt, but is more alkaline (= relatively high Na and K content). The sample seen here is from a July-August 2001 lava flow of Etna - such rocks are reported to be potassic trachybasalt. The specimen is porphyritic - it shows vesicles on broken surfaces and is somewhat scoriaceous on flow top surfaces. Reported phenocrysts include plagioclase feldspar, pyroxene and olivine. Provenance: collected August 2001 |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/51024337227/ |
| 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@N05/51024337227. It was reviewed on 11 March 2021 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 | 21:11, 11 March 2021 | | 2,891 × 2,530 (5.24 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/51024337227/ with UploadWizard |
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