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dc.contributor.author Zenobia en_US
dc.contributor.author Ann G. en_US
dc.contributor.author Geoff A. T. en_US
dc.date.accessioned 2008-12-16T10:37:37Z
dc.date.available 2008-12-16T10:37:37Z
dc.date.issued 2003-05 en_US
dc.identifier http://dx.doi.org/10.1016/S0047-2484(03)00048-4 en_US
dc.identifier.citation Jacobs , Z , Wintle , A G & Duller , G A T 2003 , ' Optical dating of dune sand from Blombos Cave, South Africa: I - multiple grain data ' Journal of Human Evolution , vol 44 , no. 5 , pp. 599-612 . , 10.1016/S0047-2484(03)00048-4 en_US
dc.identifier.other PURE: 94958 en_US
dc.identifier.other dspace: 2160/1687 en_US
dc.identifier.uri http://hdl.handle.net/2160/1687
dc.description.abstract An aeolian sand unit overlies the Middle Stone Age deposits at Blombos Cave on the southern Cape coast. These deposits contained culturally-important artefacts, including bone tools and pieces of engraved ochre, as well as a large number of worked lithics. The aeolian sand and two other remnants of the sand dune formed against the coastal cliff were dated using optical dating. To determine the dose received since deposition, measurements were made on 5 mg aliquots of purified quartz grains using the single-aliquot regenerative-dose (SAR) protocol. The results of several internal check procedures are reported and at least 15 replicate dose determinations are presented for each sample. Combining these dose values with measurements of the radioactive content of each sample resulted in an age of 69.2±3.9 ka for the unit within the cave, and a mean age of 70.1±1.9 ka for all three dune samples. This provides a minimum age for the Middle Stone Age material at Blombos Cave. en_US
dc.format.extent 14 en_US
dc.relation.ispartof Journal of Human Evolution en_US
dc.title Optical dating of dune sand from Blombos Cave, South Africa: I - multiple grain data en_US
dc.contributor.pbl Institute of Geography & Earth Sciences en_US
dc.contributor.pbl Quaternary Environmental Change Group en_US


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