Ius Chasma (Mars)

This feature is named after an earlier feature.

Ius Chasma is a large canyon in the Coprates quadrangle of Mars at 7° south latitude and 85.8° west longitude. (wikipedia entry)

A chasma is a deep, elongated, steep-sided depression. On Mars they are named after the nearest named albedo feature on the Schiaparelli or Antoniadi maps.