Geography of South Africa ore from the interior. South Africa is largely a dry country, with most of its western regions being semi-desert. The rainfall increases in the east, (the Highveld, KwaZulu-Natal, and the Eastern Midlands), and falls primarily in summer. The narrow southern coastal strip receives all-year rainfall in the east (the Garden Route), and winter rainfall in the west (on the Cape Peninsula and its surrounds). The summers are warm to hot, while the winter temperatures can vary, depending on locality from bitterly cold to cool. Thus the Karoo, which occupies a large part of the western Central Plateau, has a climate
Karoo sediments. This exposed the dolerite sills, which were more resistant to erosion than the Karoo sediments, forming one of the most characteristic features of the Karoo landscape, namely the flat topped hills, called "Karoo Koppies". The geology of the region bears no resemblance to that of the Great Karoo (see the diagram on the left, of a NS geological cross-section through the Little and Great Karoos). The valley is an integral part of the Cape Fold Mountain Belt, with the two ranges on either side composed of extremely hard, erosion-resistant, quartzitic sandstone belonging to the 450- to 510-million-year-old Table Mountain