Features of Mawrth Vallis - Layering (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)

Mawrth Vallis is a Martian Region that is famous for its "Mineral Diversity", which includes Clay minerals that formed by the chemical alteration of both rocks and loose “Regolith” (such as Soil) by water.
There is a high surface area of bedded Phyllosilicate (Clay) exposures (in a range of tens of kilometers), located in the Bright-Toned Materials.

The CRISM instrument working on the MRO Spacecraft detects a variety of Clay minerals here, which could signify different processes of formation.
The High Resolution of the HiRISE camera helps us to see and trace out Layers, Polygonal Fractures and, with CRISM, to examine the distribution of various minerals across the entire Surface.

In the light of the above considerations and data, this Surface comes out as scientifically compelling for the Mars Science Laboratory (MSL) Rover 'Curiosity' (this Region is one of the four candidate Landing Sites for the MSL).