noun Mining waste or ore processing waste: Overburden: waste material generated while searching for minerals or while mining, such as when sinking a shaft. Tailings: waste rock from which the wanted gold, minerals, opal, etc., has been extracted.
noun Overburden: waste material generated while searching for minerals or while mining, such as when sinking a shaft.
noun Tailings: waste rock from which the wanted gold, minerals, opal, etc., has been extracted.