a Aerial image showing the mosaic of vegetation associations. (a) A portion of the Omuramba Ovambo at the farm Nukuwis. Alternatively to the Terminalietum sericeo-prunioidis, the Combreto apiculati-Terminalietum prunioidis can surround this mosaic, depending on the depth of the Kalahari sand cover. (b) The central Otavi mountains north of Kombat. The mountains are covered by one of the three associations of the Commiphoro glaucescentis- Kirkietalia acuminatae, depending on steepness and massiveness of the rocks, whilst the light-coloured bands on top of the mountains represent the Auros shales with a cover of Geigerio otaviensis-Fingerhuthietum africanae. Image source: Microsoft Maps (Bing Maps).