Few things to note when you're working on Martian landscapes.
1. Best to avoid default hydraulic effects and erosion. Try thinking in terms of heavy, dry winds, and no water in the atmosphere.
2. The soil and structures themselves aren't all red, the lighting also plays a role when it comes to the red look. Research things properly before digging into materials and textures.
3. "Igneous", combined with "rocky" or any of the rock or drift noises can give you a great starting point for your shapes. Most of the erosion work you'll have to work creatively around, like sharpening of peaks etc. There are infinite ways you can approach this problem really, I'm finding it very hard to explain in text. Open Gaea and start experimenting with shapes, keep your references ready ("pureref" is a great app for pinning your references).