Peneus Patera [SEP] located on astronomical body
Peneus Patera
Peneus Patera is a feature in the Noachis quadrangle of Mars. It is located at 
58.1 S and 307.5 W. It was named after an albedo feature at 48S, 290W.
Scalloped Topography.
Peneus Patera shows what is termed "scalloped topography". Such topography displays depressions with scalloped edges. Sometimes the depressions seem to coalesce together. These features typically occur at about 55 degrees north and south latitude. They are believed to form from the removal of subsurface material, maybe interstitial ice by sublimation (change
List of extraterrestrial volcanoes
This is a list of active, dormant, and extinct volcanoes located beyond planet Earth. They may be designated mons (mountain), patera (an irregular crater) or tholus (small mountain or hill) in accordance with the International Astronomical Union's rules for planetary nomenclature. Many of them are nameless.
Io.
Io, a moon of the planet Jupiter, is the most volcanically active body in the Solar System. Its volcanoes are believed to eject sulfur and sulfur dioxide, as