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Loess is a geologically recent deposit of silt or material which is usually yellowish or brown in color and consisting of tiny mineral particles brought by wind to the places where they now lie. It is a product of past glacial activity in an area. It is a sedimentary deposit of mineral particles which are finer than sand but coarser than dust or clay, deposited by the wind. Loess is a type of silt which forms fertile topsoil in some parts of the world. Loess deposits are usually a few meters thick. One of the key characteristics of these deposits is the âcat steps'. The soil has few clay particles to hold it together.
Calcareous ooze is the most common of the three soils and covers approximately 48 percent of the ocean floor. It is composed of the shells of foraminifera, coccolithophores and pteropods, which are tiny organisms living in the ocean.oze is made up of debris from living organisms; any soil composed of more than 30 percent organic debris is classified as ooze, making it a biogenous sediment. Red clay is not organic; it's made of rock and is considered lithogenous sediment.