Recognition and Interpretation of Estuarine Mudstones (Central Basin Mudstones) in the Tripartite Valley-Fill Deposits of the Viking Formation, Central Alberta.
Published:January 01, 1992
Simon A.J. Pattison, 1992. "Recognition and Interpretation of Estuarine Mudstones (Central Basin Mudstones) in the Tripartite Valley-Fill Deposits of the Viking Formation, Central Alberta.", Applications of Ichnology to Petroleum Exploration: A Core Workshop, S. George Pemberton
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Estuarine mudstones occur in the central basin of many wave-dominated valley-fill systems. These mudstones are flanked on the landward side by the sandstones of the bay head delta and on the seaward side by the sandstones of the barrier island, tidal inlet and/or flood-tidal delta (marine sandstones). The longitudinal transition from bay head delta sandstones to central basin mudstones to marine sandstones defines the tripartite facies zonation.
Central basin mudstones are observed in the Crystal and Sundance/Edson valley-fill deposits of the Viking Formation in central Alberta. These deposits are underlain by the bioturbated mudstones and siltstones of the regional parasequences (highstand systems tract). The central basin mudstones are distinguished from the regional mudstones by their sedimentology, ichnology and vertical facies succession.
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Applications of Ichnology to Petroleum Exploration: A Core Workshop
The field of ichnology (the study of animal-sediment relationships) is undergoing rapid expansion. Increased significance is being attached to trace fossils in environmental and diagenetic interpretations of rock units and in establishing basic stratigraphic frameworks. The subject, therefore, is of importance not only for ichnologists but also for invertebrate and vertebrate paleontologists, paleoecologists, sedimentologists, stratigraphers, and resource geologists. The main purpose of this workshop is: a) to introduce the basic concepts of ichnology; b) to learn how to recognize basic types of trace fossils in core; c) to place these structures in their appropriate paleontologic, sedimentologic, and stratigraphic content; and d) to integrate this data with other lines of evidence to aid in petroleum exploration.