re: Interesting thought
Many features do look like various forms of simple slope movement processes.
Could they be enhanced by a small amout of fluid, perhaps H2SO4? Ever seen a rock glacier?
It's a pile o' rock with a very minor component of ice. They create some interesting geomorphologies. I'll Google on it.
That acid's gonna have some serious issues with the magnetite-hematite-maghemite thing. Don't know if I've a phase diagram for Fe minerrals at various pH / eH. I'll think on it.