Rhyolite_pmg_ss_2006.jpg
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Summary
| Description |
English:
Photomicrograph (crossed polarized light) of rhyolite volcanic rock. The width of the view is approximately 3 mm. The rock shows porphyritic texture, and contains vesicles. The main phenocrysts are quartz and potassium feldspar. Groundmass is composed of quartz, potassium feldspar, volcanic glass (partly crystallized to spherulitic aggregates), iron hydroxides and chlorite. Vesicles have quartz growing on their walls, forming miarolic structure.
Eesti:
Rüoliit mikroskoobi all. Vulkaaniline klaas on kristalliseeruma hakates moodustanud sfäroliitse struktuuriga kogumikke. Vesiikuleid katavad sekundaarse tekkega kvartsi mikrodruusid. Peamised fenokristallid on kvarts ning kaaliumpäevakivi.
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| Date | |
| Source | Own work |
| Author | Siim Sepp |
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License , Version 1.2 or any later version published by the Free Software Foundation ; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License . |
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This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. | |
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| This licensing tag was added to this file as part of the GFDL licensing update . |
| Annotations | This image is annotated: View the annotations at Commons |
