The Tinia Valles are a set of channels in an ancient valley in the

Memnonia quadrangle The Memnonia quadrangle is one of a series of 30 quadrangle maps of Mars used by the United States Geological Survey (USGS) Astrogeology Research Program. The Memnonia quadrangle is also referred to as MC-16 (Mars Chart-16). The quadrangle is ...

of Mars, located at 4.7° south latitude and 149° west longitude. They are 18.7 km long and were named after a classical river in Italy. The associated valley has many

dark slope streak Dark slope streaks are narrow, avalanche-like features common on dust-covered slopes in the equatorial regions of Mars.Chuang, F.C.; Beyer, R.A.; Bridges, N.T. (2010). Modification of Martian Slope Streaks by Eolian Processes. ''Icarus,'' 205 154 ...

s on its walls. These features are widely believed to be avalanches of a thin layer of bright dust that usually covers the dark surface beneath.

References

Memnonia quadrangle Valleys and canyons on Mars {{Mars-stub