Glacitectonic evidence of ice sheet interaction and retreat across the western part of Dogger Bank (North Sea) during the Last Glaciation

Phillips, Emrys; Johnson, Kirstin; Ellen, R.; Plenderleith, Gayle; Dove, Dayton; Carter, Gareth; Dakin, Nicola; Cotterill, C.

doi:10.1016/j.pgeola.2021.11.005

Cited by 3 publications

(4 citation statements)

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“…2019b, 2020; Phillips et al . 2022). Like Unit 5, the Dogger Bank Formation contains high‐amplitude internal reflection surfaces separating acoustically structureless to layered and deformed seismic units.…”

Section: Discussionmentioning

confidence: 99%

“…2018; Phillips et al . 2022) and tunnel valleys observed throughout the NW European lowlands and shallow subsurface of the North Sea (Ehlers et al . 1984; Wingfield 1989; Zagwijn 1989; Cameron et al .…”

Section: Geological History Of the Southern North Seamentioning

confidence: 98%

“…2020; Phillips et al . 2022). In addition, work to integrate the Late Weichselian lithostratigraphy of the Danish sector into the wider palaeoenvironmental context of the southern North Sea has also helped to constrain the evolution of the margin's proglacial drainage systems at eastern Dogger Bank at the end of the Late Weichselian glaciation (Prins & Andresen 2019; Prins et al .…”

Section: Geological History Of the Southern North Seamentioning

confidence: 99%

“…2019a, b, 2020; Phillips et al . 2022). Recent lithostratigraphic studies focusing on shallow cores and sub‐bottom profiler data have also greatly contributed to the understanding of how the Doggerland landscape and drainage systems evolved during and after the retreat of the ice sheets (Coughlan et al .…”

Section: Geological History Of the Southern North Seamentioning

confidence: 99%

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An integrated geological characterization of the Mid‐Pleistocene to Holocene geology of the Sørlige Nordsjø II offshore wind site, southern North Sea

Petrie,

Eide,

Haflidason

et al. 2024

Boreas

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Subsurface deposits in recently glaciated marine areas are highly heterogeneous, representing a range of glacial and postglacial environments and processes including glacitectonism, overconsolidation, fluvial and lacustrine deposition, and transgression. These heterogeneities are often linked to variations in engineering properties, with important implications for the design and installation of offshore wind infrastructure. In this study we present an integrated geological characterization of the Sørlige Nordsjø II offshore wind site, located in waters of 50–70 m depth along the southern border of the Norwegian North Sea, focusing on the evolution of the area's depositional setting during the late Quaternary period and its implications for offshore wind development. We integrate interpretations from a marine geological data set acquired in 2022 with legacy 3D seismic data and a review of the current understanding of the southern North Sea's complex glacial history. A preliminary ground model and accompanying risk map for the site is presented with five main geological units: (i) homogeneous and layered marine sands covering most of the site, with patchy distribution and coarser‐grained deposits in the east; (ii) buried, layered channel deposits containing organic material and possible associated shallow gas; (iii) buried, stiff glacilacustrine clay deposits; (iv) a buried, layered, glacitectonized unit incised by tunnel valleys, with a sandy marine infill; and (v) mounded tills and glacitectonized deposits containing boulders, exposed to shallowly buried in the east. Salt diapirism and gas migration were also found to be important potential geohazards at the site. Three‐dimensional seismic attribute maps were found to be a powerful aid to understanding the distribution and genesis of seismic facies identified on 2D high‐resolution sub‐bottom profiles. This type of data integration is an under‐utilized methodology for generating detailed preliminary ground models, which can inform more cost‐effective site survey and early foundation concept planning at geologically complex offshore wind sites.

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Section: Discussionmentioning

confidence: 99%