BK Bell's Korongo
This site lies on the right bank of the side gorge some 2½ miles above the confluence with the main gorge and a little upstream of DC. It consists of two korongos linked by a short cliff. There are good exposures of the upper and middle part of Bed II but the base is not visible. There are also some exposures of Beds III and IV in the upper part of both the gullies included in the site. Excavations were carried out here during 1952–8 and yielded a very rich culture and many fossils, including two hominid teeth.
In the eastern part of the site, a step trench has been cut down to the floor of the gorge near to the 1953–8 camp-site. A smaller excavation in the area near this trench, also yielded many stone tools and fossils.
Bos K Bos Korongo
This site lies on the right bank of the main gorge, slightly upstream of ‘Hand-axe Cliff’ and about 1 mile below the fifth fault. Extensive exposures of Bed IV have yielded some implements and also a crushed, rather incomplete bos skull, which was found during 1962.
CK Camp Korongo
This is a long gully on the left bank of the gorge between the second and third faults and adjacent to the 1931 camp. Beds IV, III, II and I are all exposed. It was at this site that the first hand axes ever recognised at Olduvai were discovered by L. S. B. Leakey in Bed IV, shortly after the arrival of the 1931 Expedition.