Smith & Bailey (2017a) have criticized the methods applied for time series analysis in our study of a late Campanian chalk core in the North Sea (Perdiou et al. 2016). These critics rely essentially on two points: (1) the resolution spacing that can be applied to our gamma-ray data; (2) the use of the autoregressive order 1 (‘AR1’) noise model, which allows calculation of significance thresholds.

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