Coal deposits are natural accumulations of coal, a fossil fuel formed from the remains of ancient plants that have undergone heat and pressure over millions of years. These deposits are typically found in sedimentary rock layers and can vary in size and quality, influencing their use for energy production and other applications. The extraction of coal from these deposits is done through mining, which can be surface or underground. Major coal-producing regions include the Appalachian Mountains in the United States and the Bowen Basin in Australia. Coal is primarily used for electricity generation and as a raw material in various industrial processes.