The Old town
The sequence begins with the Oldowan site of Karre, about 1.7 million years old, which can be correlated to level B of Gombore I, on the right bank of the Awash. A probably contemporaneous Oldowan site is documented at Garba IV. The magneto-stratigraphic sequence of Jaramillo lies between Tuff A, which overlies the Oldowan sites, and Tuff B, which is dated between 1.0 and 0.84 Myr. Some important sites, such as Garba XII and Simbiro III, datable to a transitional phase from the late Oldowan to the Early Acheulean (Garba XII) or to an archaic phase of the Acheulean (Simbiro), also lie within this chronological span.