Dolomitic land, characterized by a specific type of rock that can be easily dissolved by water, has been a contributing factor to the formation of dangerous sinkholes in various parts of Johannesburg. The city is home to large portions of dolomitic land, particularly in areas of intense residential, commercial, and industrial development. These sinkholes pose significant risks to public infrastructure and private property, especially in regions where illegal mining activities and leaking infrastructure exacerbate the problem.