👉 Loess is a type of soil that is composed mainly of fine, fine-grained particles. These particles are usually larger than 0.5 mm in diameter and are typically found in sedimentary rocks or other organic materials. Loess can be either loose or compacted, depending on the size and shape of the particles. Loess has a high water content, making it suitable for use as a soil amendment in agriculture, construction, and other applications.