The formation of soil is primarily the result of

Formation of soil:

The soil formation basically results from the weathering of rocks.

Explanation:

Weathering of rocks and the formation of soil:

The soil is mainly formed from different nutrients, and minerals. As different living organisms lives inside the soil. Weathering of rocks leads to deposition  of nutrients, minerals, and water molecules inside the different layers. The process takes place when the different molecules are carried from one point to the another on the surface of the planet, this results in the creation of different layers of soil over time.