We welcome Huntley's comment because it helps to bring to the forefront, for the readers of this journal, important aspects of our geochronometric methods and emphasizes the limitations of any quantitative study of geological materials and processes. Indeed, we subcontracted opticaldating analyses to Huntley when we began this dating effort (1992–1993) because Berger did not then have (until 1996) photon-stimulated luminescence (PSL), or optical, dating equipment.

The comment by Huntley concerns the logarithmic model of correction for anomalous fading in feldspars (so-called anomalous because when originally discovered it could not be accounted for by normal thermal-activation-kinetics equations). The logarithmic model...

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