In their recent publication, Walaszczyk et al. (2014) made a number of claims about regressive-transgressive disconformities in uppermost Turonian and Lower Coniacian (Upper Cretaceous) strata of the Western Interior foreland basin of North America. They postulated that two of the disconformities are synchronous, extending over a distance of 1650 km along the length of the Cretaceous Western Interior Seaway, from Horseshoe Dam, Alberta, Canada, on the northwestern margin of the basin to Pueblo, Colorado, United States, near its center. They proposed that the disconformities are not just intracontinental, but also intercontinental. Lastly, they extended two of the surfaces from North...

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