Poor silt erodes even faster than sand or clay, as the moderately sized, relatively lightweight particles leave space through which water can flow and take them away. Most soils contain a combination of clay, sand or silt; those high in organic matter can absorb water more quickly, reducing erosion.

Which soil is most easily eroded?

Soils most susceptible to erosion are those with the largest amount of medium (silt)-size particles. Clay and sandy soils are less prone to erosion.

What erodes quickly?

Soft rock like chalk will erode more quickly than hard rocks like granite. Vegetation can slow the impact of erosion. Plant roots adhere to soil and rock particles, preventing their transport during rainfall or wind events.