Ophir Chasma (Mars)

This feature is named after an earlier feature.

Ophir Chasma is a canyon in the Coprates quadrangle of Mars at 4° south latitude and 72.5° west longitude. It is a classical albedo feature name. (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.