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Erik Skovbjerg Rasmussen, Geological Survey of Denmark and Greenland (GEUS) (Denmark)
Karen Dybkjær, Geological Survey of Denmark and Greenland (GEUS) (Denmark)
Stefan Piasecki, Geological Survey of Denmark and Greenland (GEUS) (Denmark)
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Sea-level changes, tectonism and climate are the main controlling factors in the development of basin fill. The interpretation of the sedimentary succession in a basin is often hampered by poor biostratigraphic data, low seismic resolution and limited high quality boreholes and outcrop data.
Based on a detailed biostratigraphic and sedimentological study of 55 boreholes, 25 outcrops, new high-resolution seismic data and all available 2D seismic data both offshore and onshore Denmark, we have established a robust sequence stratigraphic model for the Neogene succession in the eastern North Sea Basin.
The Neogene succession is subdivided into 8 sequences. The evolution of these is controlled by relative sea-level changes and sediment supply. On a timescale of 6-10 My tectonism is overruling eustatic sea-level changes but in tectonic quiescence periods, eustatic sea-level changes in the order of 1-2 My control the sequence formation. The sediment supply, which is dependent on the relief of the hinterland and of the local climate, shows a remarkable correlation to tectonism, while the changing cold-temperate to subtropical climate seems to be subordinary during the Neogene era.
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