Evidence for a Grounded Ice Sheet in the central North Sea during the early Middle Pleistocene Don Glaciation.
Interpretation of 3D seismic data from the central North Sea yields evidence of a pre-MIS (Marine Isotope Stage) 12 grounded glaciation. The glaciotectonic complex shows buried push moraines resulting from the thrusting of multiple ice advance phases with horizontal shortening of 35 – 50%. The earli...
Published in: | Journal of the Geological Society |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | https://curis.ku.dk/portal/da/publications/evidence-for-a-grounded-ice-sheet-in-the-central-north-sea-during-the-early-middle-pleistocene-don-glaciation(f7d0005a-fc0f-47ce-b944-dbddb4c103b1).html https://doi.org/10.1144/jgs2017-073 |
id |
ftcopenhagenunip:oai:pure.atira.dk:publications/f7d0005a-fc0f-47ce-b944-dbddb4c103b1 |
---|---|
record_format |
openpolar |
spelling |
ftcopenhagenunip:oai:pure.atira.dk:publications/f7d0005a-fc0f-47ce-b944-dbddb4c103b1 2024-04-28T08:24:55+00:00 Evidence for a Grounded Ice Sheet in the central North Sea during the early Middle Pleistocene Don Glaciation. Bendixen, Carina Lamb, Rachel M. Huuse, Mads Boldreel, Lars Ole J.B., Jensen O.R., Clausen 2018 https://curis.ku.dk/portal/da/publications/evidence-for-a-grounded-ice-sheet-in-the-central-north-sea-during-the-early-middle-pleistocene-don-glaciation(f7d0005a-fc0f-47ce-b944-dbddb4c103b1).html https://doi.org/10.1144/jgs2017-073 eng eng info:eu-repo/semantics/closedAccess Bendixen , C , Lamb , R M , Huuse , M , Boldreel , L O , J.B. , J & O.R. , C 2018 , ' Evidence for a Grounded Ice Sheet in the central North Sea during the early Middle Pleistocene Don Glaciation. ' , Journal of the Geological Society , vol. 175 , pp. 291-307 . https://doi.org/10.1144/jgs2017-073 article 2018 ftcopenhagenunip https://doi.org/10.1144/jgs2017-073 2024-04-11T00:22:38Z Interpretation of 3D seismic data from the central North Sea yields evidence of a pre-MIS (Marine Isotope Stage) 12 grounded glaciation. The glaciotectonic complex shows buried push moraines resulting from the thrusting of multiple ice advance phases with horizontal shortening of 35 – 50%. The earliest feature observed within the complex, a hill–hole pair, represents the initial glaciation of the area. This is overlain and deformed by multiple thrust units with numerous inferred ice-flow directions. The thrust deformation observed shares characteristics with kinematic processes, push moraines and static gravity processes, seen as gravity spreading and contraction. The glaciotectonic complex in its entirety is interpreted to correlate to a pre-Elsterian glaciation, becaue of its stratigraphic position below central North Sea tunnel valleys, estimated to be Elsterian in age (MIS 12; 450 ka). The study proposes that the thrust complex correlates to the Donian glaciation in Russia (MIS 16; 600 ka) with ice sourced from Norway. The complex therefore represents a glaciation where a significant area of the central North Sea was covered by an ice sheet, 200 kyr prior to the Elsterian. This study highlights the fragmentary record of pre-Elsterian glaciations and the importance of incorporating offshore sedimentary archives and regional frameworks when reconstructing Pleistocene climate change Interpretation of 3D seismic data from the central North Sea yields evidence of a pre-MIS (Marine Isotope Stage) 12 grounded glaciation. The glaciotectonic complex shows buried push moraines resulting from the thrusting of multiple ice advance phases with horizontal shortening of 35 – 50%. The earliest feature observed within the complex, a hill–hole pair, represents the initial glaciation of the area. This is overlain and deformed by multiple thrust units with numerous inferred ice-flow directions. The thrust deformation observed shares characteristics with kinematic processes, push moraines and static gravity processes, seen as ... Article in Journal/Newspaper Ice Sheet University of Copenhagen: Research Journal of the Geological Society 175 2 291 307 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
description |
Interpretation of 3D seismic data from the central North Sea yields evidence of a pre-MIS (Marine Isotope Stage) 12 grounded glaciation. The glaciotectonic complex shows buried push moraines resulting from the thrusting of multiple ice advance phases with horizontal shortening of 35 – 50%. The earliest feature observed within the complex, a hill–hole pair, represents the initial glaciation of the area. This is overlain and deformed by multiple thrust units with numerous inferred ice-flow directions. The thrust deformation observed shares characteristics with kinematic processes, push moraines and static gravity processes, seen as gravity spreading and contraction. The glaciotectonic complex in its entirety is interpreted to correlate to a pre-Elsterian glaciation, becaue of its stratigraphic position below central North Sea tunnel valleys, estimated to be Elsterian in age (MIS 12; 450 ka). The study proposes that the thrust complex correlates to the Donian glaciation in Russia (MIS 16; 600 ka) with ice sourced from Norway. The complex therefore represents a glaciation where a significant area of the central North Sea was covered by an ice sheet, 200 kyr prior to the Elsterian. This study highlights the fragmentary record of pre-Elsterian glaciations and the importance of incorporating offshore sedimentary archives and regional frameworks when reconstructing Pleistocene climate change Interpretation of 3D seismic data from the central North Sea yields evidence of a pre-MIS (Marine Isotope Stage) 12 grounded glaciation. The glaciotectonic complex shows buried push moraines resulting from the thrusting of multiple ice advance phases with horizontal shortening of 35 – 50%. The earliest feature observed within the complex, a hill–hole pair, represents the initial glaciation of the area. This is overlain and deformed by multiple thrust units with numerous inferred ice-flow directions. The thrust deformation observed shares characteristics with kinematic processes, push moraines and static gravity processes, seen as ... |
format |
Article in Journal/Newspaper |
author |
Bendixen, Carina Lamb, Rachel M. Huuse, Mads Boldreel, Lars Ole J.B., Jensen O.R., Clausen |
spellingShingle |
Bendixen, Carina Lamb, Rachel M. Huuse, Mads Boldreel, Lars Ole J.B., Jensen O.R., Clausen Evidence for a Grounded Ice Sheet in the central North Sea during the early Middle Pleistocene Don Glaciation. |
author_facet |
Bendixen, Carina Lamb, Rachel M. Huuse, Mads Boldreel, Lars Ole J.B., Jensen O.R., Clausen |
author_sort |
Bendixen, Carina |
title |
Evidence for a Grounded Ice Sheet in the central North Sea during the early Middle Pleistocene Don Glaciation. |
title_short |
Evidence for a Grounded Ice Sheet in the central North Sea during the early Middle Pleistocene Don Glaciation. |
title_full |
Evidence for a Grounded Ice Sheet in the central North Sea during the early Middle Pleistocene Don Glaciation. |
title_fullStr |
Evidence for a Grounded Ice Sheet in the central North Sea during the early Middle Pleistocene Don Glaciation. |
title_full_unstemmed |
Evidence for a Grounded Ice Sheet in the central North Sea during the early Middle Pleistocene Don Glaciation. |
title_sort |
evidence for a grounded ice sheet in the central north sea during the early middle pleistocene don glaciation. |
publishDate |
2018 |
url |
https://curis.ku.dk/portal/da/publications/evidence-for-a-grounded-ice-sheet-in-the-central-north-sea-during-the-early-middle-pleistocene-don-glaciation(f7d0005a-fc0f-47ce-b944-dbddb4c103b1).html https://doi.org/10.1144/jgs2017-073 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Bendixen , C , Lamb , R M , Huuse , M , Boldreel , L O , J.B. , J & O.R. , C 2018 , ' Evidence for a Grounded Ice Sheet in the central North Sea during the early Middle Pleistocene Don Glaciation. ' , Journal of the Geological Society , vol. 175 , pp. 291-307 . https://doi.org/10.1144/jgs2017-073 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1144/jgs2017-073 |
container_title |
Journal of the Geological Society |
container_volume |
175 |
container_issue |
2 |
container_start_page |
291 |
op_container_end_page |
307 |
_version_ |
1797584917782069248 |