A site in Ethiopia some 50 km south of Addis Ababa, with many archaeological levels dating from over 1.5 million years old at the base to late Pleistocene times. Its long stone artifact sequence included Oldowan, Acheulian, Middle Stone Age, and Microlithic Later Stone Age. A few hominid fragments have been found, but it is the long succession of artifact assemblages and living floors which make the site important.