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Pickering, Robyn; Dirks, Paul H. G. M.; Jinnah, Zubair; de Ruiter, Darryl J.; Churchil, Steven E.; Herries, Andy I. R.; Woodhead, Jon D.; Hellstrom, John C.; Berger, Lee R.
Science (American Association for the Advancement of Science), 09/2011, Letnik: 333, Številka: 6048Journal Article
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.
