Atlantis Chaos (Mars)

From albedo feature at 30N, 173W; "First Atlantis", mythical drowned land

Atlantis Chaos is a region of disrupted terrain in the Phaethontis quadrangle of Mars. It is located around 34.7° south latitude, and 177.6° west longitude. (wikipedia entry)

A chaos is a distinctive area of broken or jumbled terrain. On Mars they are named after the nearest named albedo feature on the Schiaparelli or Antoniadi maps.