Sequence stratigraphy is an approach to analyzing lithologic successions within a time framework. This approach is applicable at a broad spectrum of scales, ranging from basinwide regional analyses to local field-development studies. The most effective application of these concepts is through the integration of a number of different data sets, with each contributing to the final interpretation. Seismic data provide continuous subsurface imaging; well-log data contribute insights regarding vertical stratigraphic stacking patterns as well as lateral facies trends; core data are essential for calibrating well-log and seismic data; outcrop data are essential for establishing the process-sedimentological framework; geochemical and paleontological data provide useful insights regarding paleo-environments as well as processes active at the time of deposition. Clearly, the greater the degree of data integration, the more robust the final interpretation.
It can be argued that applying sequence-stratigraphic concepts merely involves doing "good" geology. Many of these "sequence-stratigraphic" concepts have been embraced by the geological community at least since the beginning of the twentieth century. Indeed, the first principles upon which sequence stratigraphy is based are some of the cornerstones of sedimentary geology. Thus, the role of cyclic variations of sea level was recognized many decades ago (e.g., Gilbert, 1895; Wanless and Shepard, 1936; Wheeler and Murray, 1957). Moreover, subdivision of stratigraphic successions into "sequences" by "unconformity" surfaces is also not new (e.g., Wheeler, 1959; Sloss, 1962, 1963). However, the further recognition and interpretation of systems tracts within the sequences, embodied in what we now refer to as sequence stratigraphy, and
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Siliciclastic Sequence Stratigraphy—Concepts and Applications
Siliciclastic Sequence Stratigraphy-Concepts and Applications - Sequence stratigraphy has experienced a virtual explosion of applications in recent years. During that time, the concepts upon which sequence stratigraphy is based have been evolving to conform to new observations as well as new types of data. This volume summarizes the current status of this discipline as it applies to siliciclastic deposits. The emphasis in this volume is on sequence stratigraphy as an ?approach? to geological analysis, rather than as a model to which all data sets must conform. The expression of sequence architecture and the nature of bounding surfaces is illustrated through examples and applications drawn from a range of data types, including outcrop, core, wireline log, and 3-D seismic data. In addition, sequence expression also is illustrated using examples of modern landforms.