The islands have phosphorite and guano resources. Founded in 1998 with annual capacity of 300,000 tons of phosphorite flour. Natural resources include gypsum, sand, clay, sapropel deposits, phosphorite, and peat. Kazakhstan also possesses large deposits of phosphorite. The mountains have deposits of phosphorite, lead and zinc. Belarus also has deposits of clay, sand, chalk, dolomite, phosphorite, rock, potassium, and salt. That started the Phosphorite War public environmental campaign. The region also possesses large deposits of phosphorite. Janatas was founded in 1964 as a settlement to serve the phosphorite deposits. Phosphorite and limestone are the main non metallic minerals. Liuyang has been mining some natural resources, like sepiolite, chrysanthemum stone, coal and phosphorite. It occurs in phosphorite deposits and forms encrustations on old bones. Most phosphate mining is of sedimentary phosphorite, a phosphorus-rich deposit formed under shallow marine conditions. The phosphorite pellets production plant ceased production in 1993. Phosphorite mining in Estonia started in 1924 near Maardu.