South Polar "River-like" Surface Features? (NASA-MGS/MOC RAW b/w frame)

Caption originale:"This MGS-MOC image shows layering in terrain at the high Southern Latitudes of Mars.
South Polar layers are commonly assumed to consist of varying amounts of dust and ice but there is an an alternative explanation saying that they may be exposures of ancient sedimentary rock".

Location near: 78,9° S; 10,1° W
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Summer