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. 2011 Sep 9;333(6048):1421-3.
doi: 10.1126/science.1203697. Epub 2011 Sep 8.

Australopithecus sediba at 1.977 Ma and implications for the origins of the genus Homo

Robyn Pickering  1 , Paul H G M Dirks, Zubair Jinnah, Darryl J de Ruiter, Steven E Churchil, Andy I R Herries, Jon D Woodhead, John C Hellstrom, Lee R Berger
Affiliations

Australopithecus sediba at 1.977 Ma and implications for the origins of the genus Homo

Robyn Pickering et al. Science. .

Abstract

Newly exposed cave sediments at the Malapa site include a flowstone layer capping the sedimentary unit containing the Australopithecus sediba fossils. Uranium-lead dating of the flowstone, combined with paleomagnetic and stratigraphic analysis of the flowstone and underlying sediments, provides a tightly constrained date of 1.977 ± 0.002 million years ago (Ma) for these fossils. This refined dating suggests that Au. sediba from Malapa predates the earliest uncontested evidence for Homo in Africa.

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