F.A. Stoakes, 1992. "Nature and Succession of Basin Fill Strata", Devonian-Early Mississippian Carbonates of the Western Canada Sedimentary Basin: A Sequence Stratigraphic Framework, Jack Wendte, Frank A. Stoakes, Clarence V. Campbell
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Thick basinal sequences comprising very fine-grained sediments are common in the geological record. For the most part they present a monotonous succession of poorly defined lithologies. Although not the direct focus of exploration efforts these intervals are important in terms of permeability seals and more importantly the accumulation of hydrocarbon source sections.
This article examines the nature and controls on basin filling during the Upper Devonian - Early Mississippian of the WCSB. It focuses primarily on the Ireton and Duvernay intervals of the Woodbend sequence (see Chapter 8). However, conclusions and general inferences are then related to other basin-fill successions, namely the Waterways Formation of the Beaverhill Lake Group (Chapter 7), the Winterburn shales of the Winterburn Group (Chapter 9) and finally the Exshaw - Banff shales of the early Mississippian (Chapter 11).
Volumetrically basin-fill successions comprise a significant portion of the Upper Devonian to Lower Mississippian section in the WCSB. They may be grouped into three types based on gross lithology: 1) Evaporitic 2) Carbonate-rich 3) Shale-rich