This is called the West Rand Group and it created several interesting topographical features, such as the eponymous Witwatersrand ridge which runs between Germiston and Krugersdorp.
Sena se bitswa West Rand Group mme se na le dikarolo tse mmalwa tse thahasellisang tsa ditlhaku tse kang Witwatersrand lerako le leng pakeng tsa Germiston le Krugersdorp.