Compared to most places you might wander in the Solar System, Titan – the giant moon of Saturn – is in many ways strangely familiar to Earth.
On Earth, the sediment that makes up sand dunes is composed of inorganic silicates, but the chemistry of Titan's sand is rather different.
This light dust would eventually become so fine, it would blow away in the atmosphere, and be incapable of forming cohesive structures like giant dunes, which require larger, coarser particles to coalesce.."These collisions tend to decrease grain size through time.
."Sustaining Titan's dunes over geologic timescales requires a mechanism that produces sand-sized particles at equatorial latitudes."
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