fumarolic

/ˌfjuːməˈrɑːlɪk/
adjective
  1. Relating to or characteristic of a fumarole or the gases and activity associated with fumaroles.
    • Fumarolic deposits often contain colorful minerals like sulfur.
    • Researchers study fumarolic gases to predict volcanic eruptions.
    • The fumarolic activity increased just before the volcano erupted.
Synonyms
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