What is silt primarily composed of?

Silt is primarily composed of fine particles that are smaller than sand but larger than clay. It is made up of mineral and organic material that has a smooth texture. The composition of silt allows it to retain moisture and nutrients well, making it valuable for agriculture. It typically contains a mixture of tiny rock particles and organic matter which contribute to its rich soil quality. The size of silt particles typically ranges from 0.002 to 0.05 millimeters, which is what differentiates it from the other soil types.

Pebbles and large stones, pure clay, and sand and gravel refer to distinct types of soil or sediment with different particle sizes and properties, which do not accurately describe the composition of silt. Thus, the presence of rich soil and tiny rocks captures the essence of silt's composition effectively.