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Soffioni
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<p>Soffioni (Italian: [sofˈfjoːni]; sometimes spelt <i>suffioni</i>), a name applied in <a href="/facts/Italy/tUf0PDYF">Italy</a> to certain <a href="/facts/Volcano/c2M5upml">volcanic</a> vents which emit jets of steam, generally associated with <a href="/facts/Hydrogen_sulfide/UbCqjMMk">hydrogen sulfide</a> and <a href="/facts/Carbon_dioxide/xGzpppEp">carbon dioxide</a>, sometimes also with a little <a href="/facts/Ammonia/MtLtJFtz">ammonia</a> and <a href="/facts/Marsh_gas/L6JRFAEd">marsh gas</a>. </p><p>The soffioni are usually arranged in groups, and are best represented in the <a href="/facts/Maremma/gM0mBsfz">Maremma</a> of <a href="/facts/Tuscany/Ivw1ogrE">Tuscany</a>, where they contain a small proportion of <a href="/facts/Boric_acid/0so68XIK">boric acid</a>, for which they are utilized industrially. For such natural steam-holes, the French geologists often use the term <i>soufflards</i> in place of the Italian <i>soffioni</i>. </p>