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Browsing Quaternary Environmental Change Group by Author "Jacobs, Zenobia"

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Equivalent dose distributions from single grains of quartz at Sibudu, South Africa: context, causes and consequences for optical dating of archaeological deposits

Jacobs, Zenobia; Wintle, Ann G.; Roberts, Richard G.; Duller, Geoffrey A. T. (2008-07)

Optical ages for 14 sediment samples collected from the post-Howiesons Poort, late Middle Stone Age (MSA) and final MSA deposits at Sibudu, KwaZulu-Natal, South Africa were reported in a companion paper (Jacobs, Z., Wintle, ...
Extending the chronology of deposits at Blombos Cave, South Africa, back to 140 ka using optical dating ot single an multiple grains of quartz

Jacobs, Zenobia; Duller, Geoff A. T.; Henshilwood, C. S.; Wintle, Ann G. (2006-09)

Optically stimulated luminescence (OSL) measurements are reported for both single aliquots (of two different sizes) and single grains of quartz from deposits within Blombos Cave. Ages have been obtained for six sediments ...
Interpretation of single grain D-e distributions and calculation of D-e

Jacobs, Zenobia; Wintle, Ann G.; Duller, Geoff A. T. (2006)

Recent development of an instrument for measuring the optically stimulated luminescence signal from individual mineral grains has made it practicable to measure the equivalent dose (De) from many hundreds or thousands of ...
New ages for the post-Howiesons Poort, late and final Middle Stone Age at Sibudu, South Africa

Jacobs, Zenobia; Wintle, Ann G.; Duller, Geoffrey A. T.; Roberts, Richard G.; Wadley, Lyn (2008-07-01)

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 ...
Optical dating of dune sand from Blombos Cave, South Africa: I - multiple grain data

Duller, Geoff A. T.; Wintle, Ann G.; Jacobs, Zenobia (2003-05)

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 ...

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