Cryovolcanism

Cryovolcanism is a type of volcanic activity where instead of molten rock, instead icy substances like water, ammonia, or methane are expelled from a celestial body's surface. This process occurs on world surfaces with extremely low temperatures, such as icy moons and some dwarf planets in the outer solar system. When internal heat causes these volatiles to melt or vaporize, they can erupt through cracks or vents, creating features similar to volcanoes on Earth. Cryovolcanism plays a vital role in shaping the surface and may also deliver essential ingredients for potential habitability beneath the icy crusts.