Border Cave revisited: a revised ESR chronology

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 14C and amino acid racemization. New ESR dates for the lowermost dated sedimentary layers, 5 WA (white ash), indicate that the sedimentation of the sequence started around 200 ka ago.