Thursday, August 15, 2013

Earliest Specialized Neanderthal Bone Tools Discovered


Excavations at two cave sites in southwestern France have yielded bone fragments that show intentional shaping, likely by Neanderthals, to create specialized tools. Dated to before the known advent of modern humans in Europe, researchers suggest that they are the earliest specialized bone tools produced by Neanderthals, implying the need to re-assess elements of current theoretical models of Neanderthals and modern humans in Europe.   

Excavating at the Pech-de-l’Azé I and Abri Peyrony sites, both located at separate tributaries of the Dordogne river in southwestern France, co-leader Shannon P. McPherron of the Max Planck Institute for Evolutionary Anthropology and colleagues recovered and analyzed assemblages of Mousterian of Acheulian Tradition (MTA) stone artifacts, which also included specially shaped deer rib bone artifacts known as Lissoirs not usually associated with MTA finds. Lissoirs are a specialized tool type made by grinding and polishing, and are thought to have been used on hides to make them tough, impermeable, and lustrous. Three specimens were found at Abri Peyrony and were dated to 47,710 - 41,130 Cal BP using radiocarbon accelerator mass spectrometry, and one specimen at Pech-de-l’Azé I, dated to 51,400 ka using optically stimulated luminescence dating techniques. The researchers identified the rib bone fragments as coming from medium-sized ungulates, specifically red deer or reindeer.
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