Comment on: Paleoclimatic inference from stable isotope profiles of accretionary biogenic hardparts—a quantitative approach to the evaluation of incomplete data, by Wilkinson, B.H., Ivany, L.C., 2002. Palaeogeogr. Palaeocl. Palaeoecol. 185, 95–114

The time base reconstruction method proposed by Wilkinson and Ivany [Paleoclimatic inference from stable isotope profiles of accretionary biogenic hardparts—a quantitative approach to the evaluation of incomplete data. Palaeogeogr. Palaeocl. Palaeoecol. 185 (2002), 95–114] can be further refined. They have shown that variations in accretion rate can be reconstructed from variations in the period of the measured signal. Here, it is shown that such variations influence not only the period, but also the phase of the signal. So, a refined estimator for the time base is constructed, which takes both period and phase variations into account.