Perdiou et al. (2016) analysed two data-series from a 60 m Campanian chalk interval in the Adda-3 well offshore Denmark with the objective of identifying orbitally forced cycle periods and thus time-calibrating this part of the Campanian. The data are (1) a series of 457 gamma-ray (GR) log values (vertical spacing 0.1524 m), and (2) a series of 844 X-ray fluorescence measurements of Fe concentration from core at an average resolution of 0.07 m (but with several gaps in the data). Perdiou et al. used Thomson's multi-taper method (MTM) to generate their periodograms. They then used the Matlab function Redconf...
Discussion on ‘Orbital calibration of the late Campanian carbon isotope event in the North Sea’, Journal of the Geological Society, London 173, 504–517
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David G. Smith, Robin J. Bailey; Discussion on ‘Orbital calibration of the late Campanian carbon isotope event in the North Sea’, Journal of the Geological Society, London 173, 504–517. Journal of the Geological Society ; 175 (3): 564–565. doi: https://doi.org/10.1144/jgs2016-148
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