| http://www.w3.org/ns/prov#value | - Water vapour is the dominant constituent of such vapours, but acid gases, such as carbon dioxide and hydrogen sulfide, also characteristically occur.Fumaroles, like geysers, are manifestations of hot springs, which disperse groundwater from the upper parts of the Earth???s crust after it has been heated by magma (molten silicate material) and
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