Pluto's Surface was Shaped by Ice Volcanoes
Massive cryovolcanic eruptions shaped a large region of Pluto's surface, creating mounds of ice 4 kilometres high and 100 kilometres wide.
United States Mauna Loa Clyde Tombaugh Pam Engebretson Artwflyby Pam Engebretson Research Institute In Boulder
Source: universetoday.com