OSL and TL dating of the Middle Stone Age sequence at Diepkloof Rock Shelter (South Africa): a clarification |
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| Authors: | C Tribolo N Mercier E Douville J-L Joron J-L Reyss D Rufer N Cantin Y Lefrais CE Miller G Porraz J Parkington J-P Rigaud P-J Texier |
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| Institution: | 1. CNRS – Université de Bordeaux, UMR 5060, IRAMAT-CRP2A, Maison de l''archéologie, Esplanade des Antilles, 33607 Pessac cedex, France;2. CEA-CNRS, UMR 8212, Laboratoire des Sciences du Climat et de l''Environnement, Avenue de la terrasse, bât 12, 91198 Gif-sur-Yvettte, France;3. Groupe des Sciences de la Terre, Laboratoire Pierre Süe, CEN, Saclay, 91191 Gif-sur-Yvette, France;4. Universität Bern, Institut für Geologie, Baltzerstrasse 1+3, CH-3012 Bern, Switzerland;5. Université de Bordeaux, UMR 5060, IRAMAT-CRP2A, Maison de l''archéologie, Esplanade des Antilles, 33607 Pessac cedex, France;6. Institute for Archaeological Sciences, University of Tübingen, Rümelinstrasse 23, 72070 Tübingen, Germany;g CNRS, UMR 7041-ArScAn-AnTET, Maison de l''Archéologie et de l''Ethnologie, Université de Paris X, 21, allée de l''université, 92023 Nanterre, France;h Department of Archaeology, University of Cape Town, Rondebosch, South Africa;i PACEA, CNRS Université de Bordeaux, UMR 5199, Avenue des Facultés, 33402 Talence, France |
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| Abstract: | Diepkloof Rock Shelter offers an exceptional opportunity to study the onset and evolution of both Still Bay (SB) and Howiesons Poort (HP) techno-complexes. However, previous age estimates based on luminescence dating of burnt quartzites (Tribolo et al., 2009) and of sediments (Jacobs et al., 2008) were not in agreement. Here, we present new luminescence ages for 17 rock samples (equivalent dose estimated with a SAR-ITL protocol instead of classical MAAD-TL) as well as for 5 sediment samples (equivalent dose estimated with SAR-single grain OSL protocol) and an update of the 22 previous age estimates for burnt lithics (modified calibration and beta dose estimates). While a good agreement between the rock and sediment ages is obtained, these estimates are still significantly older than those reported by Jacobs et al. (2008). After our own analyses of the sediment from Diepkloof, it is suspected that these authors did not correctly chose the parameters for the equivalent dose determination, leading to an underestimate of the equivalent doses, and thus of the ages. |
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| Keywords: | Middle Stone Age Howiesons Poort Still Bay TL OSL |
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