This is a list of areas of chaos terrain officially named by the International Astronomical Union on the planet Mars. Chaos terrain (or chaotic terrain) is an astrogeological term used to denote planetary surface areas where features such as ridges, cracks, and plains appear jumbled and enmeshed with one another. Coordinates are in planetocentric latitude with east longitude.
Areas of chaos terrain are usually named after a nearby albedo feature as in line with the IAU's rules on planetary nomenclature. Such an albedo feature must feature on the maps of Mars made by either Giovanni Schiaparelli or Eugène Michel Antoniadi and are listed at Classical albedo features on Mars.
Chaos Coordinates Diameter (km) Approval date Named after Ref Aeolis Chaos 201 2018 Classical albedo feature name Aram Chaos 283.81 1976 Classical albedo feature name Aromatum Chaos 72.8 1979 Classical albedo feature name Arsinoes Chaos 200.08 1982 Daughter of Ptolemy Lagun and Bernice Atlantis Chaos 181.37 1985 From albedo feature at 30N, 173W Aureum Chaos 351.03 1976 Classical albedo feature name Aurorae Chaos 713.92 1991 Classical albedo name Baetis Chaos 66.66 2006 Classical albedo feature name Candor Chaos 0 1985 From albedo feature at 5N, 75W Caralis Chaos 103.35 2014 Classical albedo feature name Chryse Chaos 658.89 2008 Classical albedo feature name Echus Chaos 480.51 1985 Classical albedo feature name Eos Chaos 497.85 1982 Classical albedo feature name Erythraeum Chaos 147.63 2007 Classical albedo feature name Galaxias Chaos 234.48 1985 Albedo feature name Ganges Chaos 113.73 2006 Classical albedo feature name Gorgonum Chaos 150.71 1985 From albedo feature at 24S, 154W Hellas Chaos 590.62 1994 Named for albedo feature Hellas Hydaspis Chaos 336.04 1976 Classical albedo feature name Hydrae Chaos 66 2014 Classical albedo feature name Hydraotes Chaos 419.04 1976 Classical albedo feature name Iamuna Chaos 21.72 2006 Classical albedo feature name Iani Chaos 450.51 1976 Classical albedo feature name Ister Chaos 109.1 1985 From classical albedo feature at 10N, 56W Margaritifer Chaos 383.67 1976 Classical albedo feature name Nia Chaos 48 2017 Classical albedo feature name Nilus Chaos 283 1985 Named for albedo feature at 20N, 65W Oxia Chaos 24.12 2006 Classical albedo feature name Pyrrhae Chaos 162.35 1982 Albedo feature name Xanthe Chaos 34.37 2006 Classical albedo feature name
References
This list was adapted from the public domain Gazetteer of Planetary Nomenclature, courtesy of the United States Geological Survey.