Tons of dust fall on every acre over the eons. That's what a geologist pal told me, anyway.
Well in the 21 years I've lived in my house, my lawn has raised at least 2 inches. Some areas have gotten so high above the sidewalk that we've had to scrape off the weeds, remove dirt and re-seed (hoping for grass this time instead of weeds!) Every 5 years or so, we have to add another landscape timber on top as the others have gotten too low. Imagine a few thousand years of the same.
Just imagine if you didn't dust in your home for say six months. I wouldn't be able to find my shoes!