A block diagram of the Koobi Fora (East Rudolf) area. This shows in greater detail the physiography of the area that is yielding fossil evidence of early man. Plio-pleistocene sediments are exposed over a large part of a shelf-like strip of terrain between the lake and the rim of Tertiary volcanics. The area is approximately 50 miles from north to south and 15 to 20 miles from east to west. The director of the National Museum of Kenya, Richard Lea
Site KBS (Kay Behrensmeyer Site): A schematic reconstruction of the paleogeographic setting of the sites KBS and HAS in a delta floodplain just inland of a swampy lakeshore with lagoon (this reconstruction is subject to some revision as a result of more recent geological work).