Richardson Crater Dunes Sublimation - Sublimation is the process of going directly from a solid state to a gaseous one. In these cases, the process can expose darker subsurface material that fan outward, and are also moved by the wind. High-res

Richardson Crater Dunes Sublimation - Sublimation is the process of going directly from a solid state to a gaseous one. In these cases, the process can expose darker subsurface material that fan outward, and are also moved by the wind.