Slow erosion has characterized the Namib Desert, the Namibian escarpment, and the adjacent Namibian highlands over the Pleistocene. Paired analyses (n = 66) of in-situ-produced ¹⁰Be and ²⁶Al in quartz-bearing samples of bedrock primarily from inselbergs, of sediment from dry river and stream channels, and of clasts from desert surfaces reveal large inventories of these cosmogenic nuclides indicating significant landscape stability over at least the past million years.