Olympus Rupes (Mars)

This feature is named after an earlier feature.

Olympus Rupes is a group of cliffs along the northern face of Olympus Mons, the largest mountain on Mars and the largest volcano in the Solar System. It also forms the northern border of the mountain. (wikipedia entry)

A rupes is a scarp. On Mars they are named after the nearest named albedo feature on the Schiaparelli or Antoniadi maps.