cold clayey mud mixed with hydrocarbons, flows down from a mud volcano in the natural reserve of salse of nirano.

acid bubble clayey cold cone dirt earth environment fiorano gaseous geological geology geothermal geyser gray grey gurgling hole hot hydrocarbon hydrocarbons italy mineral mud national natural nature nirano park phenomenon pot reserve salse salt sand shape slush smoke splat steam sulfur surface tourism touristic toxic underground volcanic volcano warm