Feldspar in andesite. Sample of andesite (black) with large twinned crystals (phenocrysts) of feldspar (white) trapped within it. Andesite is an extru

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Feldspar in andesite. Sample of andesite (black) with large twinned crystals (phenocrysts) of feldspar (white) trapped within it. Andesite is an extrusive igneous (volcanic) rock. Feldspars are a very common group of silicate minerals that make up as much as 60% of the Earth's crust. They commonly occur as veins of crystals within extrusive igneous rocks such as andesite.

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Size: 4775px × 3697px
Photo credit: © DIRK WIERSMA/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: andesite, close-, crystal, crystalline, crystallised, crystallography, crystals, detail, earth, extrusive, feldspar, geological, geology, igneous, mineral, mineralogy, minerals, phenocryst, phenocrysts, porphyritic, rock, rocks, sample, science, section, sectioned, silicate, specimen, tectosilicate, volcanic, volcanology, vulcanology