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Photographs of Phlegraean Fields
Caption
Close-up view of the fumarole Big mouth of the solfatara of Pozzuoli
Close-up view of the fumarole Big mouth of the solfatara of Pozzuoli
Close view of the Fumarola
The reddish-yellow color is given by the vapors containing salts such as realgar, cinnabar and orpiment which, by settling, alter the color of the soil.