Fulgurite
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Fulgurites (from the Latin fulgur meaning thunderbolt) are natural hollow glass tubes formed in quartzose sand, silica, or soil by lightning strikes. They are formed when lightning with a temperature of at least instantaneously melts silica on a conductive surface and fuses grains together; the fulgurite tube is the cooled product. This process occurs over a period of around one second, and leaves evidence of the lightning path and its dispersion over the surface. Fulgurites can also be produced when a high voltage electrical distribution network breaks and the lines fall onto a conductive surface with sand beneath. They are sometimes referred to as petrified lightning. The glass formed is called lechatelierite which may also be formed by meteorite impact and volcanic explosions. Because it is amorphous, fulgurite is classified as a mineraloid. Fulgurites can have deep penetrations, sometimes occurring as far as below the surface that was struck.
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| Fulgurites in New Scientist Fulgurites in New Scientist environment.newscientist.com/.../mg19426102.100-the-word-fulgurite.html - Web |
| Glossary of Meteorology definitions (including Ful... Glossary of Meteorology definitions (including Fulgurite). amsglossary.allenpress.com/glossary/browse?s=f&p=51 - Web |
| Petrified Lightning by Peter E. Viemeister (pdf) Petrified Lightning by Peter E. Viemeister (pdf) ira.usf.edu/.../47.Petrified.pdf - Web |
Gallery for «Fulgurite»
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| Mindat with location data Mindat with location data www.mindat.org/min-7747.html - Web |
| W. M. Myers and Albert B. Peck, A Fulgurite from S... W. M. Myers and Albert B. Peck, A Fulgurite from South Amboy, New Jersey, www.minsocam.org/MSA/collectors_corner/arc/njfulgurite.htm - Web |
| Vladimir A. Rakov, Lightning Makes Glass, Vladimir A. Rakov, Lightning Makes Glass, plaza.ufl.edu/rakov/Gas.html - Web |
| Interview (The Event: Petrified Lightning from Cen... Interview (The Event: Petrified Lightning from Central Florida) allanmccollum.net/amcimages/pdffiles.html - Web |
| Yale Bulletin and Calendar Yale Bulletin and Calendar www.yale.edu/opa/arc-ybc/v34.n30/story3.html - Web |
