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Stratigraphic columns and beryllium ages of KT 12 (Australopithecus bahrelghazali locality, Koro Toro, Early Pliocene, Northern Chad), KL and KB 1. (The circle on the localization map indicates the studied area; red numbers, number of the sample in Table 2). The Australopithecus bahrelghazali holotype is precisely located in KT 12 section.
