Why is there sand in deserts and no dirt? Why isn’t there sand anywhere else?

Question

I figured it was something to do with sand being light enough to be carried by wind, but that wouldn’t explain why the rest of the world lacks sand.

In: 327

Answer 1

Sand is part of the fertile soil as well (apart from organic matter and clay). The sahara desert and similar ones have no organic matter obviously (maybe some clay). There are some deserts which are not as dry.