The HRSC image shows a section of Mamers Valles, a huge canyon and channel system in the northern hemisphere. The valley system stretches roughly 1,000 kilometers across the Martian dichotomy, from the ancient highlands of Arabia Terra to the lower plains near Deuteronilus Mensae (see context map). In its middle sections, the valley is about 25 kilometers wide and as much as 1.2 kilometers deep. The surrounding area is known as so called ”fretted terrain”, a region characterized by numerous deep and very wide labyrinth like valleys, flat-topped mesas, steep cliffs and glacier-like deposits (see annotated image). The region dates back to the Late Noachian period, around 3.8 billion years ago, when Mars was transitioning from a wetter, more geologically active world into the colder planet we see now. The name “Mamers” comes from the Oscan language, an ancient Italic language of pre-Roman Italy, where “Mamers” meant Mars. The feature received its official name in 1976. Mamers Valles is smaller than the famous Valles Marineris — the “Grand Canyon of Mars”.