One explanation for this process is methane outgassing, which relies on dissociation of clathrates. 
One explanation for this process is methane outgassing, which relies on dissociation of clathrates. The Ganesa Macula dome may have been created by this process, and in another location this process is responsible for creating the E ring and occurs in the "tiger stripes." Hili and Mahilani are two structures responsible for it, and the radioactive decay on may drive it on Quaoar. It is usually caused by tidal friction or a sub-surface greenhouse effect. The first known instance of this phenomenon was discovered by Voyager 2 on Triton, while Cassini discovered this phenomenon on Enceladus. FTP, name this astrogeological phenomenon in which geysers spew cold water, ammonia, or methane, seen on several outer planet moons.
One explanation for this process is methane outgassing, which relies on dissociation of clathrates.
Cryovolcanism