You never see a big mound of it or a finger-width layer even if the surface is left untouched for years whereas other “powdery” substances (like snow) can form layers of all sizes. Why is that?
In: Earth Science
Like someone said, dust is usually disturbed before it does pile up. Years ago I was underneath a steel plant’s blast furnace – this wild deep foundation pit where everything was made out of bricks – and found dust layers that were over an inch deep on some surfaces. I remember finding some dust graffiti that dated itself, somewhere around 10 years old at that time since someone had stood where I did.
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