The Salse di Nirano near Fiorano are
an interesting geological curiosity. Eruptions of salty mud have
formed miniature volcanos with craters, explosions and emissions
of inflammable gas. These are due above all to underground deposits
of hydrocarbons (particularly natural gas), which escape to the
surface, bringing with them salty water and mud. Together with
the mud, the volcanos also emit small amounts of brown coloured
liquid hydrocarbons, which used to be exploited for medicinal
purposes and for lighting in the last century. However, these
deposits are of no economic value today.
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