There it attaches to particles of minerals (sand, silt , and clay) and organic matter, forming clumps.
They carry silt which replenishes the topsoil and enables agriculture to flourish.
The towers fall, the rivers silt , the bridges crumble.
The textures of soils reflect the proportion of sand, silt , and clay sizes within that portion of an inorganic soil fraction that is less than 2 mm.
Water continuing out over the playa surface carries with it a quantity of fine sand, silt , and clay in suspension.
However, in addition to that alluvium much of central Belfast is underlain instead by a deposit of soft grey mud, silt and fine sand with numerous sea shells, in particular oysters.
Tidal processes constantly winnow the substrate surface in the submerged mouthbar front, and resuspend mud and silt into the water.
This is soil whose properties are controlled equally by the percentages of clay, silt and sand particles.
Soil texture, or the proportion of sand, silt and clay particles, directly influences nutrient content, moisture and drainage.
The way sand, silt and clay particles are grouped together in aggregates is called the soil structure.