The emergence of sequence stratigraphy—the study of genetically related facies within a framework of chronostratigraphically significant surfaces—triggered a conceptual breakthrough in stratigraphy (Van Wagoner et al., 1990; Baum and Vail, 1998) and vastly improved our understanding of the fossil record (Holland, 1999). Sequence-bounding unconformities and transgressive surfaces are the record of relative sea-level changes and a signature of time intervals not represented in the geological record. This is a key issue for those interested in documenting the steps in the history of life. Despite a good sampling of the rock record (Donovan and Paul, 1998...

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