Cyclostratigraphy must contend with the unknowns in the relationship between strata and time. These include the unquantifiable and highly variable short-term rates of accumulation and the frequency and scale of the gaps in the record. High-resolution cyclostratigraphic time calibrations, especially of the ‘floating’ kind, must rely on the sequence recognizably encoding the ‘beats’ of a periodic influence on sedimentation, such as orbitally forced climatic variation. Spatial cyclicity in stratigraphic data series provides the most compelling reasons for assuming such periodic influences, but only if the analytical methods used to establish the cyclicities are reliable (see Vaughan et al. 2011)....

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