Sequence Stratigraphy of the Jurassic–lowermost Cretaceous (Hettangian–Berriasian) of the North Sea Region
This volume provides a landmark documentation of Jurassic sequence stratigraphy in the North Sea Basin, onshore UK and adjacent regions of the British Isles. It includes detailed sequence descriptions, historical syntheses and updated lithostratigraphy and biozonation schemes, all illustrated by numerous case studies, maps, well displays, seismic lines and biozonation charts.
Chapter 3. Sequence stratigraphy scheme for the Lower Jurassic of the North Sea area
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Published:July 14, 2023
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CiteCitation
Philip Copestake, Mark A. Partington, 2023. "Chapter 3. Sequence stratigraphy scheme for the Lower Jurassic of the North Sea area", Sequence Stratigraphy of the Jurassic–lowermost Cretaceous (Hettangian–Berriasian) of the North Sea Region, P. Copestake, M. A. Partington
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Abstract
This chapter describes Lower Jurassic second-order sequences J00 and J10, and their component third-order sequences J1–J6 and J12–J18. Two sequences (J1 and J3) are new, four sequences (J2, J4, J12 and J16) are amended and one sequence (J17) is renamed.
A significant unconformity at the base of the J12 sequence (Upper Sinemurian) is present near the base of the Dunlin Group in the North Viking Graben–East Shetland Platform and in the Danish Central Graben, and correlates with an equivalent unconformity around the margins of the London Platform, onshore UK. A marked unconformity at the base of the J16 sequence is recognized in the North Viking Graben and onshore UK, where it is related to structural movements on the Market Weighton High, eastern England.
Several levels of carbon enrichment (carbon isotope excursions (CIEs)) and associated geochemical changes tie to J sequences defining maximum flooding surfaces: the Upper Sinemurian CIE equates to the base J6 maximum flooding surface (MFS), the basal Pliensbachian CIE ties to the base J13 MFS, the basal Toarcian CIE relates to the base J17 MFS and the Toarcian Ocean Anoxic Event corresponds with the base J18 MFS.
- Atlantic Ocean
- biostratigraphy
- correlation
- Denmark
- Dunlin Group
- East Shetland Basin
- England
- Europe
- Great Britain
- Hettangian
- Jurassic
- Lower Jurassic
- Mesozoic
- North Atlantic
- North Sea
- North Sea region
- oceanic anoxic events
- Pliensbachian
- Scandinavia
- sequence stratigraphy
- Sinemurian
- stratigraphic boundary
- Toarcian
- unconformities
- United Kingdom
- Viking Graben
- Western Europe
- East Shetland Platform
- North Viking Graben
- Danish Central Graben
- Market Weighton High