Lightning hit a volcano, instantly melting the rock to create this fulgurite. The liquid cooled too quickly for crystals to form. Hollow tubes lined with greenish-black glass record the electric current's path through the rock.
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Details
Title: Fulgurite in Weathered Andesite
Location: Turkey
Type: Mineral
Rights: This image was obtained from the Smithsonian Institution. The image or its contents may be protected by international copyright laws. http://www.si.edu/termsofuse