Soffioni
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Soffioni ({{#invoke:IPA|main}}; sometimes spelt suffioni), a name applied in Italy to certain volcanic vents which emit jets of steam, generally associated with hydrogen sulfide and carbon dioxide, sometimes also with a little ammonia and marsh gas.<ref name=":1911">Template:1911</ref>
The soffioni are usually arranged in groups, and are best represented in the Maremma of Tuscany, where they contain a small proportion of boric acid, for which they are utilized industrially.<ref>Template:Cite book</ref><ref name=":1911"/> For such natural steam-holes, the French geologists often use the term soufflards in place of the Italian soffioni.<ref name=":1911"/>