Evidence of Resedimentation in Chalk from the Central Graben, North Sea
R. A. Schatzinger, C. T. Feazel, W. E. Henry, 1985. "Evidence of Resedimentation in Chalk from the Central Graben, North Sea", Deep-Water Carbonates: Buildups, Turbidites, Debris Flows and Chalks—A Core Workshop, Paul D. Crevello, Paul M. Harris
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The slow rain of pelagic skeletons to the sea floor is not the depositional event commonly recorded in North Sea chalk. Cores from the Central Graben reveal a spectrum of resedimentation features interpreted as the products of slumps, debris flows, and turbidity currents. Evidence for reworking includes mixed faunas from discrete environments, intermingled biostratigraphic zones, chalk clasts, contorted bedding, calcarenite, synsedimentary microfaults and fractures, and the absence of bioturbation. Recognition of allochthonous intervals and interpretation of the mechanisms responsible are important to problems of correlation, reservoir geometry, and engineering properties.