Journal
JOURNAL OF HUMAN EVOLUTION
Volume 40, Issue 6, Pages 467-482Publisher
ACADEMIC PRESS LTD
DOI: 10.1006/jhev.2001.0471
Keywords
Border Cave; Howieson's Poort; MSA; LSA; ESR dating; BC1 to BC8
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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 C-14 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. (C) 2001 Academic Press.
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