Geodynamic generation of a Paleocene-Eocene landscape buried beneath North Bressay, North Sea
Histories of vertical lithospheric motions provide important clues about geodynamic processes. We present evidence of an ancient (∼58–55 Ma) landscape that likely uplifted and subsided rapidly during incipience of the Icelandic plume. Now buried beneath ∼0.4–0.8 km of rock in the North Bressay regio...
Published in: | Journal of the Geological Society |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
The Geological Society
2022
|
Subjects: | |
Online Access: | http://hdl.handle.net/10044/1/99308 https://doi.org/10.1144/jgs2022-063 |
id |
ftimperialcol:oai:spiral.imperial.ac.uk:10044/1/99308 |
---|---|
record_format |
openpolar |
spelling |
ftimperialcol:oai:spiral.imperial.ac.uk:10044/1/99308 2023-05-15T17:33:45+02:00 Geodynamic generation of a Paleocene-Eocene landscape buried beneath North Bressay, North Sea Roberts, G Stucky De Quay, G 2022-08-16 http://hdl.handle.net/10044/1/99308 https://doi.org/10.1144/jgs2022-063 unknown The Geological Society Journal of the Geological Society 0016-7649 http://hdl.handle.net/10044/1/99308 doi:10.1144/jgs2022-063 © 2022 The Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 License (http://creativecommons.org/licenses/by/4.0/). Published by The Geological Society of London. Publishing disclaimer: www.geolsoc.org.uk/pub_ethics http://creativecommons.org/licenses/by/4.0/ CC-BY 10 1 Journal Article 2022 ftimperialcol https://doi.org/10.1144/jgs2022-063 2022-12-22T23:42:19Z Histories of vertical lithospheric motions provide important clues about geodynamic processes. We present evidence of an ancient (∼58–55 Ma) landscape that likely uplifted and subsided rapidly during incipience of the Icelandic plume. Now buried beneath ∼0.4–0.8 km of rock in the North Bressay region in the North Sea, this landscape is located within a sedimentary basin on the margin of the North Atlantic Ocean. We use high-resolution 3D seismic reflection data to map this ancient surface. Correlation of stratigraphy with a survey in the Bressay region constrains age and depositional environment. The landscape contains excellent evidence of meandering fluvial channels, some of which record avulsions, and terminate against a coastline to the east where deltaic landforms are identified. The landscape was depth-converted and decompacted to generate a digital elevation model from which river profiles were extracted. Their geometries indicate that the landscape was generated by three phases of uplift. This history of uplift and subsidence is analogous to similar-aged landscapes in the Judd area ∼400 km to the west and Bressay ∼30 km to the south, and appears to be another manifestation of lithospheric motions generated by the passage of warm thermal anomalies away from the Icelandic plume. Article in Journal/Newspaper North Atlantic Imperial College London: Spiral Judd ENVELOPE(170.433,170.433,-85.067,-85.067) Journal of the Geological Society |
institution |
Open Polar |
collection |
Imperial College London: Spiral |
op_collection_id |
ftimperialcol |
language |
unknown |
description |
Histories of vertical lithospheric motions provide important clues about geodynamic processes. We present evidence of an ancient (∼58–55 Ma) landscape that likely uplifted and subsided rapidly during incipience of the Icelandic plume. Now buried beneath ∼0.4–0.8 km of rock in the North Bressay region in the North Sea, this landscape is located within a sedimentary basin on the margin of the North Atlantic Ocean. We use high-resolution 3D seismic reflection data to map this ancient surface. Correlation of stratigraphy with a survey in the Bressay region constrains age and depositional environment. The landscape contains excellent evidence of meandering fluvial channels, some of which record avulsions, and terminate against a coastline to the east where deltaic landforms are identified. The landscape was depth-converted and decompacted to generate a digital elevation model from which river profiles were extracted. Their geometries indicate that the landscape was generated by three phases of uplift. This history of uplift and subsidence is analogous to similar-aged landscapes in the Judd area ∼400 km to the west and Bressay ∼30 km to the south, and appears to be another manifestation of lithospheric motions generated by the passage of warm thermal anomalies away from the Icelandic plume. |
format |
Article in Journal/Newspaper |
author |
Roberts, G Stucky De Quay, G |
spellingShingle |
Roberts, G Stucky De Quay, G Geodynamic generation of a Paleocene-Eocene landscape buried beneath North Bressay, North Sea |
author_facet |
Roberts, G Stucky De Quay, G |
author_sort |
Roberts, G |
title |
Geodynamic generation of a Paleocene-Eocene landscape buried beneath North Bressay, North Sea |
title_short |
Geodynamic generation of a Paleocene-Eocene landscape buried beneath North Bressay, North Sea |
title_full |
Geodynamic generation of a Paleocene-Eocene landscape buried beneath North Bressay, North Sea |
title_fullStr |
Geodynamic generation of a Paleocene-Eocene landscape buried beneath North Bressay, North Sea |
title_full_unstemmed |
Geodynamic generation of a Paleocene-Eocene landscape buried beneath North Bressay, North Sea |
title_sort |
geodynamic generation of a paleocene-eocene landscape buried beneath north bressay, north sea |
publisher |
The Geological Society |
publishDate |
2022 |
url |
http://hdl.handle.net/10044/1/99308 https://doi.org/10.1144/jgs2022-063 |
long_lat |
ENVELOPE(170.433,170.433,-85.067,-85.067) |
geographic |
Judd |
geographic_facet |
Judd |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
10 1 |
op_relation |
Journal of the Geological Society 0016-7649 http://hdl.handle.net/10044/1/99308 doi:10.1144/jgs2022-063 |
op_rights |
© 2022 The Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 License (http://creativecommons.org/licenses/by/4.0/). Published by The Geological Society of London. Publishing disclaimer: www.geolsoc.org.uk/pub_ethics http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1144/jgs2022-063 |
container_title |
Journal of the Geological Society |
_version_ |
1766132360549498880 |