page_title: Geography of South Africa
section_title: Central plateau
hierarchical_section_title: Geography of South Africa / Topographical divisions / Central plateau
caption_attribution_description: English: A diagrammatic North-South geological cross section through the southern Cape, South Africa, at approximately the 21° 30' E showing the relationship between the Cape Fold Mountains and the Great Escarpment, and the geological structures that make up these geographical features, as well as the the position of the Great and Little Karoo in relation to the mountain ranges.
context_page_description: South Africa occupies the southern tip of Africa, its coastline stretching more than 2,850 kilometres from the desert border with Namibia on the Atlantic coast southwards around the tip of Africa and then northeast to the border with Mozambique on the Indian Ocean. The low-lying coastal zone is narrow for much of that distance, soon giving way to a mountainous escarpment that separates the coast from the high inland plateau. In some places, notably the province of KwaZulu-Natal in the east, a greater distance separates the coast from the escarpment. Although most of the country is classified as semi-arid, it has considerable variation in climate as well as topography. The total land area is 1,220,813 km². It has the 23rd largest Exclusive Economic Zone of 1,535,538 km².
  The South African central plateau contains only two major rivers: the Limpopo, and the Orange which runs with a variable flow across the central landscape from east to west, emptying into the Atlantic Ocean at the Namibian border.
  The eastern and southern coastal regions are drained by numerous shorter rivers. There are very few coastal rivers along the arid west coast north of 31°30′S.
context_section_description: The central plateau (apart from the Lesotho Highlands) forms a largely flat, tilted surface which, as indicated above, is highest in the east, sloping gently downwards to the west (at about 1,000 m above sea level). The downward slope to the south is less pronounced (the southern and south-western edges of the plateau are at about 1600 to 1900 m above sea level). The plateau also slopes downwards, northwards from about the 25° 30' S line of latitude, into a 150‑million-year-old failed rift valley which cuts into the central plateau and locally obliterates the Great Escarpment, forming what is today known as the Limpopo Lowveld at less than 500 m above sea level. The rivers which drain the plateau therefore run west, ultimately, via the Orange River, into the Atlantic Ocean. North of the Witwatersrand, where the land starts to slope down towards the north, the drainage is into the Limpopo River and from there into the Indian Ocean.
caption: A diagrammatic 400 km north-south cross-section through the southern portion of the country near Calitzdorp in the Little Karoo (approximately 21° 30’ E), showing the relationship between the Cape Fold Mountains (and their geological structure) and the geology of the Little and Great Karoo, as well as the position of the Great Escarpment. The colour code for the geological layers is the same as those used in the diagram on the left. The heavy black line flanked by opposing arrows is the fault that runs for nearly 300 km along the southern edge of the Swartberg Mountains. The Swartberg Mountain range owes some of its great height to upliftment along this fault line. The subsurface structures are not to scale.
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