Fumarola
Una fumarola es un pichon plumacho gassós que sa temperatura varia generalament entre 100 e 500°C e qu'es emés dins una zona volcanica.
Lo gas pòu tanben de còps transportar de particulas, d'acids (especialament l'acid sulfuric), d'elements mineraus d'origina magmatica e dei traças de vapor metellica. La temperatura, l'aciditat e la concentracion de sofre dei fumarolas aumentan quand lo risc d'erupcion aumenta.
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