List of areas of chaos terrain on Mars

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.

In this mosaic taken by the Mars Global Surveyor, Aram Chaos lies in the upper left and Iani Chaos in the lower right.
ChaosCoordinatesDiameter (km)Approval dateNamed afterRef
Aeolis Chaos7.13°S 150.6°W / -7.13; -150.6 (Aeolis)2012018Classical albedo feature nameWGPSN
Aram Chaos2.52°N 337.61°E / 2.52; 337.61 (Aram)283.811976Classical albedo feature nameWGPSN
Aromatum Chaos1.03°S 317.03°E / -1.03; 317.03 (Aromatum)72.81979Classical albedo feature nameWGPSN
Arsinoes Chaos7.66°S 332.08°E / -7.66; 332.08 (Arsinoes)200.081982Daughter of Ptolomy Lagun and BerniceWGPSN
Atlantis Chaos34.28°S 182.69°E / -34.28; 182.69 (Atlantis)181.371985From albedo feature at 30N, 173WWGPSN
Aureum Chaos3.89°S 333.04°E / -3.89; 333.04 (Aureum)351.031976Classical albedo feature nameWGPSN
Aurorae Chaos8.47°S 325.19°E / -8.47; 325.19 (Aurorae)713.921991Classical albedo nameWGPSN
Baetis Chaos0.17°S 299.6°E / -0.17; 299.6 (Baetis)66.662006Classical albedo feature nameWGPSN
Candor Chaos6.94°S 287.42°E / -6.94; 287.42 (Candor)01985From albedo feature at 5N, 75WWGPSN
Caralis Chaos37.2°S 178.6°E / -37.2; 178.6 (Caralis)103.352014Classical albedo feature nameWGPSN
Chryse Chaos9.86°N 322.81°E / 9.86; 322.81 (Chryse)658.892008Classical albedo feature nameWGPSN
Echus Chaos10.79°N 285.28°E / 10.79; 285.28 (Echus)480.511985Classical albedo feature nameWGPSN
Eos Chaos16.82°S 313.48°E / -16.82; 313.48 (Eos)497.851982Classical albedo feature nameWGPSN
Erythraeum Chaos21.84°S 347.62°W / -21.84; -347.62 (Erythraeum)147.632007Classical albedo feature nameWGPSN
Galaxias Chaos33.83°S 347.62°E / -33.83; 347.62 (Galaxias)234.481985Albedo feature nameWGPSN
Ganges Chaos9.76°S 313.96°W / -9.76; -313.96 (Ganges)113.732006Classical albedo feature nameWGPSN
Gorgonum Chaos37.26°S 189.1°E / -37.26; 189.1 (Gorgonum)150.711985From albedo feature at 24S, 154WWGPSN
Hellas Chaos47.12°S 64.41°W / -47.12; -64.41 (Hellas)590.621994Named for albedo feature HellasWGPSN
Hydaspis Chaos3.09°N 333.07°E / 3.09; 333.07 (Hydaspis)336.041976Classical albedo feature nameWGPSN
Hydrae Chaos5.9°S 300.03°E / -5.9; 300.03 (Hydrae)662014Classical albedo feature nameWGPSN
Hydraotes Chaos1.12°N 324.71°E / 1.12; 324.71 (Hydraotes)419.041976Classical albedo feature nameWGPSN
Iamuna Chaos0.28°S 319.39°E / -0.28; 319.39 (Iamuna)21.722006Classical albedo feature nameWGPSN
Iani Chaos2.19°S 342.96°E / -2.19; 342.96 (Iani)450.511976Classical albedo feature nameWGPSN
Ister Chaos12.95°N 303.44°E / 12.95; 303.44 (Ister)109.11985From classical albedo feature at 10N, 56WWGPSN
Margaritifer Chaos9.3°S 338.3°E / -9.3; 338.3 (Margaritifer)383.671976Classical albedo feature nameWGPSN
Nia Chaos6.74°S 292.62°E / -6.74; 292.62 (Nia)482017Classical albedo feature nameWGPSN
Nilus Chaos25.39°N 283.05°E / 25.39; 283.05 (Nilus)2831985Named for albedo feature at 20N, 65WWGPSN
Oxia Chaos0.22°N 320.13°E / 0.22; 320.13 (Oxia)24.122006Classical albedo feature nameWGPSN
Pyrrhae Chaos10.46°S 331.6°W / -10.46; -331.6 (Pyrrhae)162.351982Albedo feature nameWGPSN
Xanthe Chaos11.87°N 317.78°E / 11.87; 317.78 (Xanthe)34.372006Classical albedo feature nameWGPSN

References

This list was adapted from the public domain Gazetteer of Planetary Nomenclature, courtesy of the United States Geological Survey.

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