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The AAPG/Datapages Combined Publications Database

GCAGS Transactions


Gulf Coast Association of Geological Societies Transactions
Vol. 42 (1992), Pages 363-380

Three Component Sequence Stratigraphy

Walter W. Wornardt (1), Jim Z. W. Zhang (1), Peter R. Vail (2)


Rapid developments in sequence stratigraphy have significantly changed the way of subdividing, correlating and mapping sedimentary rocks. Sequence stratigraphy has evolved from a theoretically controversial model into a practically accepted method. Currently there is a tremendous amount of interest in practicing sequence stratigraphy with different approaches being employed by various researchers. We believe that high resolution biostratigraphy, well-logs and seismic profiles are three fundamental components in the sequence stratigraphic analysis. They are interdependent and incomplete by themselves, and each of these components must be analyzed and integrated with each other using an iterative process in order to obtain accurate and reliable results.

By using bioevents, fossil abundance and diversity histogram patterns, high resolution biostratigraphy provides a solid time framework that permits accurate correlations of sequences and systems tracts. Paleobathymetric interpretations facilitates lithofacies and seismic facies determinations. Analysis of well-log signatures within the aforesaid time framework permits delimitation of sequences and systems tracts. The geometry, configuration, continuity and amplitudes of seismic profiles offer another dimension of evidence in sequence stratigraphy because it visualizes the regional distributions and variations of sequences and systems tracts.

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