Labou Vallis is a 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 8.7° south latitude and 154.5° west longitude. It is 222 km long and has

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. The streaks are generally thought to be the dark material that has been exposed by bright dust moving down a steep slope in an avalanche. Labou is a distributary of the Mangala Vallis, emerging from an opening in a crater wall along the floor of the latter.

Naming

The origin of the word "Labou" was previously stated to be the "French word for Mars," but this was found to be incorrect.

References

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