The mountain-building materials like Bauxite, Nickle, Gold, Magma are produced by volcanoes.
Explanation :
Bauxite is the ore of Aluminium and is mainly in the form of aluminum oxide. Nickle and Iron in the form of iron sulfide gases and Nickel tungsten are also found in the vapors which settle down. Rare earth minerals like Gold are occasionally found in the magma, which is the burning lava of the volcanic material. Besides, plumes of dust and smoke are thrown up which sediment and help in mountain formations.
