"Metalliferous" refers to materials or deposits that contain metal or are capable of yielding metal when processed. These materials are often found in the earth's crust and can include ores, which are naturally occurring solid materials from which a metal can be extracted profitably. Common examples of metalliferous ores include iron ore, copper ore, and gold ore. The extraction of metals from metalliferous deposits is a crucial part of the mining industry. This process typically involves mining the ore, followed by various methods of refining to separate the metal from other elements. Metalliferous resources are essential for producing a wide range of products, from construction materials to electronics.