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dc.contributor.author Jacobs, Zenobia
dc.contributor.author Wintle, Ann G.
dc.contributor.author Duller, Geoffrey A. T.
dc.contributor.author Roberts, Richard G.
dc.contributor.author Wadley, Lyn
dc.date.accessioned 2011-01-06T09:56:28Z
dc.date.available 2011-01-06T09:56:28Z
dc.date.issued 2008-07-01
dc.identifier.citation Jacobs , Z , Wintle , A G , Duller , G A T , Roberts , R G & Wadley , L 2008 , ' New ages for the post-Howiesons Poort, late and final Middle Stone Age at Sibudu, South Africa ' Journal of Archaeological Science , vol 35 , no. 7 , pp. 1790-1807 . , 10.1016/j.jas.2007.11.028 en
dc.identifier.issn 0305-4403
dc.identifier.other PURE: 156391
dc.identifier.other dspace: 2160/6048
dc.identifier.uri http://hdl.handle.net/2160/6048
dc.description Jacobs, Z., Wintle, A. G., Duller, G. A. T., Roberts, R. G., Wadley, L. (2008). New ages for the post-Howiesons Poort, late and final Middle Stone Age at Sibudu, South Africa. Journal of Archaeological Science, 35(7): 1790-1807. Sponsorship: Sir Henry Strakosch Memorial Trust; ARC Discovery Project grant DP0666084; NERC grant NER/T/S/2002/00677 en
dc.description.abstract Optically stimulated luminescence (OSL) measurements are reported for single grains of quartz from deposits within Sibudu rock shelter. Such measurements enable rejection of unrepresentative grains and application of the finite mixture and central age models to obtain the most reliable age estimates. Three types of single-grain equivalent dose (De) distributions were observed: one sample represented a single dose population, three samples indicated mixing between Iron Age (IA) and Middle Stone Age (MSA) deposits, and 10 samples (in addition to the three mixed samples) showed scattered distributions. The latter type resulted from differences in the beta dose received by individual grains. For these samples, the beta doses were modelled and adjusted accordingly. Ages for the 14 samples collected from MSA deposits post-dating the Howiesons Poort (HP) resulted in three age clusters, which are stratigraphically consistent with the three informally named cultural phases at Sibudu: namely, the post-HP, late MSA and final MSA. Weighted mean ages of 58.5 +/- 1.4 ka, 47.7 +/- 1.4 ka and 38.6 +/- 1.9 ka were calculated for these phases, respectively. The three phases were separated by two occupational hiatuses with durations of 10.8 +/- 1.3 ka and 9.1 +/- 3.6 ka. We hypothesise that the punctuated presence of humans at Sibudu was determined by large-scale fluctuations in climate during oxygen isotope stage (OIS) 3, which resulted in alternating wet and dry periods. Phases of occupation correspond to wet periods when fresh water was available in the Tongati River, whereas intervals of site abandonment correspond to dry periods when people were forced to migrate in search of a reliable source of fresh water. Where people migrated to, remains unresolved. (c) 2007 Elsevier Ltd. All rights reserved. en
dc.format.extent 18 en
dc.language.iso eng
dc.relation.ispartof Journal of Archaeological Science en
dc.subject post-Howiesons Poort en
dc.subject dose distributions en
dc.subject JINMIUM ROCK SHELTER en
dc.subject SINGLE GRAINS en
dc.subject single grains en
dc.subject MODERN HUMANS en
dc.subject QUARTZ en
dc.subject NORTHERN AUSTRALIA en
dc.subject optically stimulated luminescence en
dc.subject BLOMBOS CAVE en
dc.subject CAL KYR BP en
dc.subject Middle Stone Age en
dc.subject LUMINESCENCE en
dc.subject South Africa en
dc.subject MULTIPLE GRAINS en
dc.subject oxygen isotope stage 3 en
dc.subject BORDER CAVE en
dc.title New ages for the post-Howiesons Poort, late and final Middle Stone Age at Sibudu, South Africa en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1016/j.jas.2007.11.028
dc.contributor.institution Institute of Geography & Earth Sciences en
dc.contributor.institution Department of Welsh en
dc.contributor.institution Quaternary Environmental Change Group en
dc.description.status Peer reviewed en


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