Ceti Chasma (Mars)
From albedo feature at 10S, 74W.
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.
Ceti Chasma
-5.03° N 291.63° E
-5.03° N 291.63° E