Karoo Supergroup of the country, and in the Lebombo mountains along the Mozambique border. Once the layer of hard lava was eroded away, the softer Karoo sediments over the rest of the basin eroded even faster. However, the dolerite sills resisted erosion, protecting the softer Beaufort and Ecca shales beneath them. This created numerous and widespread flat topped hills, known as Karoo Koppies ("koppie" being the Afrikaans term for hill), which are iconic of the Karoo, and, by extension, the South African landscape. The dykes, or vertical fissures which brought the lava to the surface stand out today as linear ridges extending
Karoo Desert National Botanical Garden such as the succulents of the unique Robertson Karoo vegetation type, and patches of the threatened Breede Shale Renosterveld vegetation type. The cultivated area, with its network of pathways, includes a very large succulent collection. Including the greenhouses it maintains nearly 3,000 species. There are another 400 plant species that are naturally indigenous to the garden's premises. A range of wild animals also naturally occurs in the garden, including the shrub hare, grey mongoose, three tortoises species ("Chersina angulata", "Stigmochelys pardalis" & "Homopus areolatus") and a range of other small mammals, reptiles and amphibians. Karoo Desert National Botanical Garden The