DOI: 10.1016/j.quascirev.2017.11.001
Scopus记录号: 2-s2.0-85034785728
论文题名: Large-scale glacitectonic deformation in response to active ice sheet retreat across Dogger Bank (southern central North Sea) during the Last Glacial Maximum
作者: Phillips E. ; Cotterill C. ; Johnson K. ; Crombie K. ; James L. ; Carr S. ; Ruiter A.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 179 起始页码: S73
结束页码: S79
语种: 英语
英文关键词: Dogger bank
; Large-scale glacitectonics
; North sea
; Weichselian glaciation
Scopus关键词: Deformation
; Glacial geology
; Glaciers
; Sediments
; Seismology
; Dogger bank
; High resolution seismic data
; Ice sheet dynamics
; Internal structure
; Large-scale glacitectonics
; Last Glacial Maximum
; North Sea
; Weichselian glaciation
; Ice
; accretion
; deformation
; folding
; glacial sedimentation
; glaciation
; Holocene
; ice retreat
; ice ridge
; ice sheet
; Last Glacial Maximum
; meltwater
; moraine
; proglacial environment
; sedimentary basin
; seismic data
; shape
; thrust
; Weichselian
; Atlantic Ocean
; Dogger Bank
; North Sea
英文摘要: High resolution seismic data from the Dogger Bank in the central southern North Sea has revealed that the Dogger Bank Formation records a complex history of sedimentation and penecontemporaneous, large-scale, ice-marginal to proglacial glacitectonic deformation. These processes led to the development of a large thrust-block moraine complex which is buried beneath a thin sequence of Holocene sediments. This buried glacitectonic landsystem comprises a series of elongate, arcuate moraine ridges (200 m up to > 15 km across; over 40–50 km long) separated by low-lying ice marginal to proglacial sedimentary basins and/or meltwater channels, preserving the shape of the margin of this former ice sheet. The moraines are composed of highly deformed (folded and thrust) Dogger Bank Formation with the lower boundary of the deformed sequence (up to 40–50 m thick) being marked by a laterally extensive décollement. The ice-distal parts of the thrust moraine complex are interpreted as a “forward” propagating imbricate thrust stack developed in response to S/SE-directed ice-push. The more complex folding and thrusting within the more ice-proximal parts of the thrust-block moraines record the accretion of thrust slices of highly deformed sediment as the ice repeatedly reoccupied this ice marginal position. Consequently, the internal structure of the Dogger Bank thrust-moraine complexes can be directly related to ice sheet dynamics, recording the former positions of a highly dynamic, oscillating Weichselian ice sheet margin as it retreated northwards at the end of the Last Glacial Maximum. © 2017 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112342
Appears in Collections: 气候减缓与适应
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作者单位: British Geological Survey, The Lyell Centre, Heriot-Watt University, Research Avenue South, Riccarton, Edinburgh, Scotland EH14 4AS, United Kingdom; RPS Energy Ltd, Goldvale House, 27-41 Church Street West, Woking, Surrey, GU21 6DH, United Kingdom; Department of Geography, Queen Mary University of London, Mile End Road, London, E1 4NS, United Kingdom
Recommended Citation:
Phillips E.,Cotterill C.,Johnson K.,et al. Large-scale glacitectonic deformation in response to active ice sheet retreat across Dogger Bank (southern central North Sea) during the Last Glacial Maximum[J]. Quaternary Science Reviews,2018-01-01,179