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Investigating the effects of lightning on cultural heritage: Characterization of the resulting fulgurite

AutorGonzález Laguna, R; Oujda, M; Martín Crespo, T; Álvarez de Buergo, Mónica ; Lozano Fernández, R.P; Fort González, Rafael ; Castillo, Marta
Palabras claveCultural heritage
Fecha de publicación21-sep-2009
Citación8th International Conference on Lasers in the Conservation of Artworks, Sibiu, Romania, September 21-25, 2009
ResumenOn average, about 100 lightning discharges occur every second on the Earth. When lightning strikes soil, sand or rock, the high temperatures reached (about 30.000 ºK) promote the formation of melted glass tubular structures known as fulgurites. In the case referred here, lightning stroked a soil (granitic sand plus angular stones of thick-grained two-mica granite) and allochthonous materials supporting the platform of an electric tower. The intense melting produced a cylindrical rod, from which, as if they were roots of a tree, several bifurcating horizontal and subhorizontal branches of decreasing thickness were attached (see figure below).
Aparece en las colecciones: (IGEO) Comunicaciones congresos
(IQFR) Comunicaciones congresos
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Fichero Descripción Tamaño Formato  
AbstractLACONA_Alvarez_Fulgurite.pdfAbstract al Congreso Lasers in the conservation of artworks172,95 kBAdobe PDFVista previa
Fulgurites_LACONA8.pdfPresentación al Congreso Lasers in the conservation of artworks1,15 MBAdobe PDFVista previa
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