The Tinia Valles are a set of channels in an ancient valley in the Memnonia quadrangle 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.^[1] The associated valley has many dark slope streaks 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.

Tinia Valles

The Tinia Valles, as seen by HiRISE (click for full size image to view the dark slope streaks)
Coordinates	4°42′S 149°00′W / 4.7°S 149°W / -4.7; -149