Fumaroles

Fumaroles. Fumeroles a fumarole is typically an opening in a planet’s crust allowing gases and dissolved minerals from deep below the surface to. Fumaroles are vents or openings that issue steam and hydrogen sulphide and other gases, and are usually associated with past or current magmatic activity.

Fumaroles represent a gentler and more continuous source of sulfur. The more fumaroles present, the less pressure the steam is under.