– where did soil originally come from?

Question

I couldn’t decide whether chemistry or biology was a more appropriate tag so split the difference with planetary science

In: Planetary Science

Answer 1

Rocks and minerals crumbling apart into bits, plants and animals (and the animals’ pee and poop) decomposing. Bacteria and other microorganisms eating the decomposing stuff, and each other. Soil is generally some mixture of these things.