solids suspended in liquids which may include water, which is frequently acidic or salty, and hydrocarbon fluids. Recently, possible mud volcanoes have been identified on Mars . [1] Contents [ hide ] 1 Details 1.1 Features 1.2 Emissions 2 Locations 2.1 Europe 2.2 Asia 2.2.1 Lusi (Indonesia) 2.2.2 Central Asia 2.2.3