Anorthite in andesite. Sample of andesite (grey) with large twinned crystals (phenocrysts) of anorthite (white) trapped within it. Andesite is an extr

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Anorthite in andesite. Sample of andesite (grey) with large twinned crystals (phenocrysts) of anorthite (white) trapped within it. Andesite is an extrusive igneous (volcanic) rock. Anorthite is a type of feldspar, which 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: 4874px × 3646px
Photo credit: © DIRK WIERSMA/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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