The most abundant metal element in the Earth's crust.
Bauxite ore is the main source of aluminum and is imported from Guinea, Australia, Jamaica, etc.
Friction products, asbestos cement pipes and sheets, coatings and compounds, packing and gaskets, roofing and flooring products, paints and caulking and chemical filters. Fibers are dangerous when breathed, so uses must protect against fibers becoming airborne. Extrusive means that it solidified after flowing onto the surface of the earth. Basalt is used in many of the same ways as granite. It is suitable for railroad ballast, for asphalt and road aggregate in highway construction.