Witwatersrand, Johannesburg (Gauteng)
… Witwatersrand, ridge of gold-bearing rock mostly in Gauteng Province , South Africa. … The highland, which forms the watershed between the Vaal and Limpopo rivers, is about 100 km long and 37 km wide; its average elevation is about 1,700 meters. Its rich gold deposits, occurring in conglomerate beds known as reefs, …