The final volume in a series which has documented the finds of one of the most important prehistoric sites in the world.This volume, written largely by Mary Leakey herself, is the last of the reports on the Olduvai excavation and records the archaeological finds in the upper part of the Olduvai sequence from excavations carried out from the end of 1968 until 1971.This volume, written largely by Mary Leakey herself, is the last of the reports on the Olduvai excavation and records the archaeological finds in the upper part of the Olduvai sequence from excavations carried out from the end of 1968 until 1971.At Olduvai Gorge in northern Tanzania, natural erosion exposed a series of superimposed geological beds containing rich artifacts and fossil assemblages spanning the past 1.8 million years. The site is famous as a result of excavations conducted there since 1951 under the direction of Mary Leakey and her husband, the late Louis Leakey. This book records the archaeological finds in the upper part of the Olduvai Gorge sequence, covering the period 1.2 to 0.4 million years ago, and includes artifacts and faunal remains excavated from sites in Beds III, IV and the Masek Beds.List of figures; List of tables; List of plates; Acknowledgements; List of abbreviations; Introduction; 1. Geology and dating of Beds III, IV and the Masek Beds R. L. Hay; 2. Bed III, J. K. (Juma's Korongo) Mary Leakey; 3. The base of Bed IV, WK Hippo Cliff, PDK Trench IV, WK the Lower Channel Mary Leakey; 4. Lower Bed IV. HEB East, HEB and HEB West, WK Intermediate Channel Mary Leakey; 5. Upper Bed IV. WK, Upper Channel, WK East A and C, PDK Trenches I-III, HEB West Level I Mary Leakey; 6. The Masek Beds and Sites in uncertain context Mary Leakey; 7. The Fauna Mary Leakey; 8. A metrical analysis of selected sets of handaxes and cleavers from Olduvai Gorge, Tanzania D. A. Roe; 9. The Olduvai bifaces: technology and raw materials P. Callow; 10. Results of experimental work in relation to the Stone Inl“–