Peat is a brownish color. The compact brownish deposit is made up of partially decomposed plant matter that is saturated in water. It is found in uplands and bogs that are located in temperate and cold regions. It is used as fertilizer, and dried peat is burned as fuel.
According to Encyclopaedia Britannica, peatification is the process of plant matter becoming peat. It is influenced by different factors, such as the nature of the plant material deposited, the availability of nutrients to support bacterial life, the availability of oxygen, the acidity of the peat and temperature. The formation of peat is the first step in the process of forming coal. As the depth of burial and temperature of peat increases, it starts to change into different types of coal.