A mud flow on Mars?

Planetary Geomorphology Image of the Month, October 31, 2015: Lionel Wilson (Lancaster University, UK) and Peter Mouginis-Mark (University of Hawaii). Image 1 shows a distinctive flow deposit southwest of the Cerberus Fossae on Mars.  The flow source is a ~20 m deep, ~12 x 1.5 km wide depression within a yardang field associated with the Medusae Fossae Formation.  The flow traveled for ~40 km following topographic lows to leave a deposit on average 3-4 km wide and up to 10 m thick.  The surface morphology of the deposit suggests that it was produced by the emplacement of a fluid flowing in a laminar fashion and possessing a finite yield strength. There is an ongoing debate about whether flows in this region of Mars are lava flows or water-rich debris flows. [More at link]