Dates from amino acid and atomic mass spectroscopy of ostrich eggs.Eren M. I. Durant A. J. Prendergast M. & Mabulla A. Z. P. (2014). Middle Stone Age archaeology at Olduvai Gorge Tanzania. Quaternary International 322–323(0) 292-313.

Homo heidelbergensis rhodesiensis

(Naisiusiu) Olduvai
Fire reference: Mortlock A. J. (1984). Thermoluminescence dating of Objects and Materials from the South Pacific Region. Journal de la Soci»t» des oc»anistes 40(78) 64-71.)
Homo rhodesiensis

Leakey M. D. Hay R. L. Thurber D. L. Protsch R. & Berger R. (1972). Stratigraphy Archaeology and Age of the Ndutu and Naisiusiu Beds Olduvai Gorge Tanzania. World Archaeology 3(3) 328-341.

Broad bracket units from Olduvai correlation with ngaloba beds (Laetoli) suggests age of 130kReference: Millard A. R. (2008). A critique of the chronometric evidence for hominid fossils: I. Africa and the Near East 500-50 ka. Journal of human evolution 54(6) 848-874.McHenry L. J. Mollel G. F. & Swisher Iii C. C. (2008). Compositional and textural correlations between Olduvai Gorge Bed I tephra and volcanic sources in the Ngorongoro Volcanic Highlands Tanzania. Quaternary International 178(1) 306-319.

Homo heidelbergensis rhodesiensis

(Naisiusiu) Olduvai
Fire reference: Mortlock A. J. (1984). Thermoluminescence dating of Objects and Materials from the South Pacific Region. Journal de la Soci»t» des oc»anistes 40(78) 64-71.)
Homo rhodesiensis

Leakey M. D. Hay R. L. Thurber D. L. Protsch R. & Berger R. (1972). Stratigraphy Archaeology and Age of the Ndutu and Naisiusiu Beds Olduvai Gorge Tanzania. World Archaeology 3(3) 328-341; Millard A. R. (2008). A critique of the chronometric evidence for hominid fossils: I. Africa and the Near East 500-50 ka. Journal of human evolution 54(6) 848-874.McHenry L. J. Mollel G. F. & Swisher Iii C. C. (2008). Compositional and textural correlations between Olduvai Gorge Bed I tephra and volcanic sources in the Ngorongoro Volcanic Highlands Tanzania. Quaternary International 178(1) 306-319.