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.

Name	Latitude	Longitude	Diameter (km)
Aram Chaos	2.57 N	338.5 E	277.0
Aromatum Chaos	1.09 S	317.0 E	91.5
Arsinoes Chaos	7.61 S	332.0 E	230.0
Atlantis Chaos	34.4 S	182.4 E	162.0
Aureum Chaos	4.35 S	333.0 E	368.0
Aurorae Chaos	8.9 S	324.7 E	750.0
Baetis Chaos	0.24 S	299.47 E	55.0
Caralis Chaos	37.2 S	178.6 E	103.4
Chryse Chaos	10.29 N	323.3 E	735.0
Echus Chaos	10.78 N	285.2 E	473.0
Eos Chaos	16.62 S	313.1 E	490.0
Erythraeum Chaos	21.86 S	347.62 E	149.0
Galaxias Chaos	33.8 N	146.4 E	234.0
Ganges Chaos	9.64 S	313.8 E	120.0
Gorgonum Chaos	37.19 S	189.1 E	149.0
Hellas Chaos	47.48 S	64.0 E	595.0
Hydaspis Chaos	3.16 N	332.9 E	355.0
Hydrae Chaos	5.9 S	300.0 E	66.0
Hydraotes Chaos	0.79 N	324.6 E	417.5
Iamuna Chaos	0.2 S	319.3 E	18.0
Iani Chaos	2.77 S	342.5 E	434.0
Ister Chaos	12.86 N	303.6 E	103.4
Margaritifer Chaos	8.6 S	338.4 E	390.0
Nilus Chaos	25.35 N	282.8 E	283.0
Oxia Chaos	0.2 N	320.1 E	26.5
Pyrrhae Chaos	10.38 S	331.5 E	189.0
Xanthe Chaos	11.74 N	317.75 E	34.0

References

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