Domes are naturally formed, curved landforms shaped like half a sphere. They are created through igneous processes related to volcanic eruptions or intrusions of molten rock. One example is the Vredefort Dome in South Africa, which was formed over 2 billion years ago by the impact of a large meteorite that created a 190km wide crater. The Vredefort Dome is the oldest and largest impact crater on Earth. Humans cannot make productive use of the Vredefort Dome for agriculture or mining due to its geological nature.