The evolution of the Dogger Bank, North Sea: A complex history of terrestrial, glacial and marine environmental change

QUATERNARY SCIENCE REVIEWS

卷:171

Article

Cotterill, Carol J.¹  Phillips, Emrys¹  James, Leo²  Forsberg, Carl Fredrik³  Tjelta, Tor Inge⁴  Carter, Gareth¹  Dove, Dayton¹ 

[1] British Geol Survey, Lyell Ctr, Res Ave South, Edinburgh EH14 4AP, Midlothian, Scotland

[2] RPS Energy Ltd, Goldvale House,27-41 Church St West, Woking GU21 6DH, Surrey, England

[3] NGI, Sognsveien 72, N-0855 Oslo, Norway

[4] STATOIL, Forusbeen 50, N-4035 Stavanger, Norway

关键词: Dogger Bank;    North Sea;    Stratigraphy;    2D seismic data;    Glacial and marine environmental change;    Quaternary;    Glaciation;    Western Europe;    Geomorphology;    Glacial;   

DOI  :  10.1016/j.quascirev.2017.07.006

来源: Elsevier

【 摘 要 】

This paper presents a summary of the results of a detailed multidisciplinary study of the near surface geology of the Dogger Bank in the southern central North Sea, forming part of a site investigation for a major windfarm development undertaken by the Forewind consortium. It has revealed that the Dogger Bank is internally complex rather than comprising a simple layer cake of the Quaternary sediments as previously thought. Regional and high-resolution seismic surveys have enabled a revised stratigraphic framework to be established for the upper part of this sequence which comprises the Eem (oldest), Dogger Bank, Bolders Bank formations and Botney Cut Formation (youngest), overlain by a typically thin Holocene sequence. Detailed mapping of key horizons identified on the high-resolution seismic profiles has led to the recognition of a series of buried palaeo-landsystems which are characterised by a range of features including; glacial, glacifluvial and fluvial channels, a large-scale glacitectonic thrust-moraine complex with intervening ice-marginal basins, a lacustrine basin and marine ravinement surfaces. Interpretation of these buried landscapes has enabled the development of an environmental change model to explain the evolution of the Dogger Bank. This evolution was driven by the complex interplay between climate change, ice sheet dynamics and sea level change associated with the growth and subsequent demise of the British and Irish and Fennoscandian ice sheets during the Weichselian glaciation. Following the decay of these ice sheets the Dogger Bank entered a period of significant climatic and environmental flux which saw a terrestrial landscape being progressively inundated as sea levels rose during the Holocene. Crown Copyright (C) 2017 Published by Elsevier Ltd. All rights reserved.

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