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If sufficiently hot when deposited, the particles in an ignimbrite may weld together, and the deposit is transformed into a "welded ignimbrite," made of eutaxitic lapilli-tuff. When this happens, the pumice lapilli commonly flatten, and these appear on rock surfaces as dark lense-shapes, known as fiamme. Intensely welded ignimbrite may have glassy zones near the base and top, called lower and upper "vitrophyres," but central parts are microcrystalline ("lithoidal").  2, fiche 1, Anglais, - welded%20ignimbrite

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Many ignimbrites are loose, unconsolidated deposits, but some exhibit welding, giving the ignimbrite the texture of a solid rock mass, hence the terms commonly used to describe these examples: welded tuff and welded ashflow.  3, fiche 1, Anglais, - welded%20ignimbrite

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welded ignimbrite: term used at Natural Resources Canada - Earth Sciences Sector.  4, fiche 1, Anglais, - welded%20ignimbrite

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Ignimbrites soudées en conditions sous-aquatiques : l'exemple du Viséen des Vosges du Sud (France).  2, fiche 1, Français, - ignimbrite%20soud%C3%A9e

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ignimbrite soudée : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.  3, fiche 1, Français, - ignimbrite%20soud%C3%A9e

Fiche 1,  Justifications,  Espagnol