TL dating of burnt lithics from Blombos cave (South Africa): further evidence for the antiquity of modern human behaviour

Chantal Tribolo (1, 2) , N. Mercier (1, 2) , M. Selo (3) , H. Valladas (1, 2) , J.-L. Joron (4) , J.-L. Reyss (1) , C. Henshilwood (5) , J. Sealy (6) , R. Yates (7)

1 LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
2 GEOTRAC - Géochrononologie Traceurs Archéométrie
3 LEME / UNA - Laboratoire d'Etude de la Matière Extraterrestre / UMS Nano-analyses
4 LPS - Laboratoire Pierre Süe
5 CDS, Centre for Development Studies
6 Iziko Museum of Cape Town
7 Quaternary Research Centre and Department of Archaeology, University of Cape Town

This paper presents the first TL dates for burnt quartzites and silcretes from the Still Bay layers of Blombos Cave (South Africa). These layers contained engraved ochres and marine shell beads that could be an early manifestation of symbolic and thus ‘modern’ behaviour by the Middle Stone Age humans. The procedure devised to calculate the ages is presented in detail, particularly with regard to internal microdosimetry, because the problems faced in estimating the dose rates require an approach different from the one usually used on flints and sediments. A mean age of 74 ± 5 ka was obtained for five burnt lithics unearthed in the BBC M1 member of the Still Bay layers. This result is in good agreement with both ESR dates on teeth and OSL dates on sediment, and demonstrates the great antiquity of the archaeological remains discovered at Blombos Cave.

Domaines: Archéologie et Préhistoire; Environnement et Société

Chantal Tribolo, N. Mercier, M. Selo, H. Valladas, J.-L. Joron, et al.. TL dating of burnt lithics from Blombos cave (South Africa): further evidence for the antiquity of modern human behaviour. Archaeometry, 2006, 48 (2), pp.341-357. ⟨10.1111/j.1475-4754.2006.00260.x⟩. ⟨hal-01983021⟩