Border Cave revisited: a revised ESR chronology |
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Authors: | Grün R Beaumont P |
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Institution: | Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia. rainer.grun@anu.edu.au |
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Abstract: | In view of a decade of progress in ESR dating we have revised the ESR chronology of Border Cave. A detailed gamma ray survey in 1994 and newly calculated beta attenuation data led to total dose rate estimations that are between 0 and 30% smaller than previously estimated. Accordingly, the resulting ESR age estimates are between 0 and 30% older. The ESR dates are now in good agreement with independent age estimates, particularly(14)C and amino acid racemization. New ESR dates for the lowermost dated sedimentary layer, 5 WA (white ash), indicate that the sedimentation of the sequence started around 200 ka ago. |
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Keywords: | Border Cave Howieson’ s Poort MSA LSA ESR dating BC1 to BC8 |
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