Abstract

Based on recently published data dealing with the Jurassic lithostratigraphy from the Danish, Dutch, and Norwegian sectors of the Central Graben areas, it seems possible to establish a more consistent and dynamic stratigraphic scheme for these regions. A preliminary proposal of a south-north lithostratigraphic section, from the Dutch to the southern Norwegian sector is discussed. It is suggested to initiate an international cooperation in order to study the common geological features in detail.

Highlights

  • Since the publication of Rhys (1974) on the "lithostratigraphic nomenclature" in the southern North Sea various papers, dealing with the Jurassic lithostratigraphy in the Central North Sea, have appeared

  • The formation was established in the Dutch sector (NAM & RGD 1980) and extends into the southern Danish sector

  • At present it seems likely that a hot unit is present in the Dutch sector but it is still open for discussion if the remaining part of the Clay Deep Formation should be referred to the Kimmeridge Clay

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Summary

Introduction

Since the publication of Rhys (1974) on the "lithostratigraphic nomenclature" in the southern North Sea various papers, dealing with the Jurassic lithostratigraphy in the Central North Sea, have appeared. The amount of available well data has increased considerably, leading to even more reliable lithostratigraphic subdivisions within each of the national sectors of the North Sea. At the same time, the amount of available well data has increased considerably, leading to even more reliable lithostratigraphic subdivisions within each of the national sectors of the North Sea Correlation between these sectors still needs to be discussed between the geoscientists from the countries involved. In this chapter we will discuss several Jurassic lithological units from the Danish, Dutch, and southern Norwegian sectors which are thought to surpass national boundaries (see fig.I, for the area dealt with). The discussion is gennerally referring to the following papers: Jensen et al (1986) and Michelsen et al (1987) for the Danish sector. NAM & RGD (1980), Herngreen & de Boer (1984), and Herngreen & Wong (1989) for the Dutch sector. Vollset & Dore (1984) and Bergan et al (1989) for the Norwegian sector

Danish sector
Lower Graben Sand Formation
Middle Graben Shale Formation
Bryne Formation
Basal sand
Heno Formation
Lola Formation
Farsund Formation
Hot unit
Pout Formation
Dutch sector
Middle Graben
Kimmeridge Clay Formation
Clay Deep Formation
Norwegian sector
Heno Formation Equivalent
Haugesund Formation
Conclusion
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