kopje

…and scattered steep-sided hills called kopjes, or koppies. The Highveld plains are thought to have been created by pedimentation, in which the areas around resistant rock are eroded away, leaving mountains of low relief and kopjes. Large areas of the western part of the region are also covered by “pans,”…

…granite hillocks known locally as kopjes. Belts of schist in the basement complex contain the veins and lodes of most of the country’s gold, silver, and other commercial minerals.