Lower Pliocene Hominid Remains from Sterkfontein
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Cosmogenic aluminum-26 and beryllium-10 burial dates of low-lying fossiliferous breccia in the caves at Sterkfontein, South Africa, show that associated hominid fossils accumulated in the Lower Pliocene. These dates indicate that the skeleton StW 573 and newly discovered specimens from Jacovec Cavern have much the same age: approximately 4 million years. These specimens are thus of an age similar to Australopithecus anamensis from East Africa.
Science, Vol. 300, no. 5619 (2003-04-25).
The American Association for the Advancement of Science
Partridge, T. C.; Granger, D. E.; Caffee, M. W.; and Clarke, R. J., "Lower Pliocene Hominid Remains from Sterkfontein" (2003). KIP Articles. 3234.