Sabis Vallis, as seen by THEMIS. The small channels are joining to form Sabis Vallis.
Sabis Vallis is an ancient river valley in the Memnonia quadrangle of Mars, located at 5.3° south latitude and 152.5° west longitude. It is 206 km long and was named after a classical name for the present Sambre River in France and Belgium.
Original source: https://en.wikipedia.org/wiki/Sabis Vallis. Read more