Stratigraphy of the Upper Jurassic to lowermost Cretaceous in the Rødryggen-1 and Brorson Halvø-1 boreholes, Wollaston Forland, North-East Greenland
Two shallow cores drilled in northern Wollaston Forland, North-East Greenland, provide a combined section covering the upper Kimmeridgian (Upper Jurassic) – Barremian (Lower Cretaceous) and comprising the Bernbjerg, Lindemans Bugt, Palnatokes Bjerg and Stratumbjerg Formations. A new lithostratigraph...
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Geological Survey of Denmark and Greenland (GEUS)
2023
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ftjgeusbullet:oai:geusjournals.org:article/8342 2024-09-15T18:04:15+00:00 Stratigraphy of the Upper Jurassic to lowermost Cretaceous in the Rødryggen-1 and Brorson Halvø-1 boreholes, Wollaston Forland, North-East Greenland Alsen, Peter Piasecki, Stefan Nøhr-Hansen, Henrik Pauly, Sebastian Sheldon, Emma Hovikoski, Jussi Greenland 2023-12-21 application/pdf text/html text/xml application/epub+zip https://geusbulletin.org/index.php/geusb/article/view/8342 https://doi.org/10.34194/geusb.v55.8342 eng eng Geological Survey of Denmark and Greenland (GEUS) https://geusbulletin.org/index.php/geusb/article/view/8342/14439 https://geusbulletin.org/index.php/geusb/article/view/8342/14436 https://geusbulletin.org/index.php/geusb/article/view/8342/14438 https://geusbulletin.org/index.php/geusb/article/view/8342/14437 https://geusbulletin.org/index.php/geusb/article/view/8342/14421 https://geusbulletin.org/index.php/geusb/article/view/8342 doi:10.34194/geusb.v55.8342 Copyright (c) 2023 Peter Alsen, Stefan Piasecki, Henrik Nøhr-Hansen, Sebastian Pauly, Emma Sheldon, Jussi Hovikoski https://creativecommons.org/licenses/by/4.0 GEUS Bulletin; Vol. 55 (2023): The Upper Jurassic – Lower Cretaceous of East and North-East Greenland: Rødryggen-1 and Brorson Halvø-1 boreholes, Wollaston Forland Basin 2597-2154 2597-2162 10.34194/geusb.v55i ammonite stratigraphy calcareous nannofossil stratigraphy Jurassic–Cretaceous boundary palynostratigraphy Storsletten Member Earth Science Geology info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article. 2023 ftjgeusbullet https://doi.org/10.34194/geusb.v55.834210.34194/geusb.v55i 2024-06-23T23:34:47Z Two shallow cores drilled in northern Wollaston Forland, North-East Greenland, provide a combined section covering the upper Kimmeridgian (Upper Jurassic) – Barremian (Lower Cretaceous) and comprising the Bernbjerg, Lindemans Bugt, Palnatokes Bjerg and Stratumbjerg Formations. A new lithostratigraphic unit, the Storsletten Member, is defined within the Lindemans Bugt Formation. The black mudstone-dominated intervals are dated primarily by dinoflagellate cysts and ammonites, whereas the calcareous mudstones of the Palnatokes Bjerg Formation – sandwiched between the black mudstones – are dated by calcareous nannofossils. The stratigraphy demonstrates an almost complete succession in the Rødryggen-1 core, representing a deeper position in the basin, where the hiatus at the latest Jurassic rift climax predicted in previous models for the eastern Wollaston Forland Basin is absent. In contrast, the Brorson Halvø-1 core represents a position closer to a block crest where unconformities developed. In combination, the cores provide a key biostratigraphic reference section for the Jurassic–Cretaceous boundary interval in the Arctic. Article in Journal/Newspaper East Greenland Greenland Wollaston forland GEUS Bulletin (Geological Survey of Denmark and Greenland) |
institution |
Open Polar |
collection |
GEUS Bulletin (Geological Survey of Denmark and Greenland) |
op_collection_id |
ftjgeusbullet |
language |
English |
topic |
ammonite stratigraphy calcareous nannofossil stratigraphy Jurassic–Cretaceous boundary palynostratigraphy Storsletten Member Earth Science Geology |
spellingShingle |
ammonite stratigraphy calcareous nannofossil stratigraphy Jurassic–Cretaceous boundary palynostratigraphy Storsletten Member Earth Science Geology Alsen, Peter Piasecki, Stefan Nøhr-Hansen, Henrik Pauly, Sebastian Sheldon, Emma Hovikoski, Jussi Stratigraphy of the Upper Jurassic to lowermost Cretaceous in the Rødryggen-1 and Brorson Halvø-1 boreholes, Wollaston Forland, North-East Greenland |
topic_facet |
ammonite stratigraphy calcareous nannofossil stratigraphy Jurassic–Cretaceous boundary palynostratigraphy Storsletten Member Earth Science Geology |
description |
Two shallow cores drilled in northern Wollaston Forland, North-East Greenland, provide a combined section covering the upper Kimmeridgian (Upper Jurassic) – Barremian (Lower Cretaceous) and comprising the Bernbjerg, Lindemans Bugt, Palnatokes Bjerg and Stratumbjerg Formations. A new lithostratigraphic unit, the Storsletten Member, is defined within the Lindemans Bugt Formation. The black mudstone-dominated intervals are dated primarily by dinoflagellate cysts and ammonites, whereas the calcareous mudstones of the Palnatokes Bjerg Formation – sandwiched between the black mudstones – are dated by calcareous nannofossils. The stratigraphy demonstrates an almost complete succession in the Rødryggen-1 core, representing a deeper position in the basin, where the hiatus at the latest Jurassic rift climax predicted in previous models for the eastern Wollaston Forland Basin is absent. In contrast, the Brorson Halvø-1 core represents a position closer to a block crest where unconformities developed. In combination, the cores provide a key biostratigraphic reference section for the Jurassic–Cretaceous boundary interval in the Arctic. |
format |
Article in Journal/Newspaper |
author |
Alsen, Peter Piasecki, Stefan Nøhr-Hansen, Henrik Pauly, Sebastian Sheldon, Emma Hovikoski, Jussi |
author_facet |
Alsen, Peter Piasecki, Stefan Nøhr-Hansen, Henrik Pauly, Sebastian Sheldon, Emma Hovikoski, Jussi |
author_sort |
Alsen, Peter |
title |
Stratigraphy of the Upper Jurassic to lowermost Cretaceous in the Rødryggen-1 and Brorson Halvø-1 boreholes, Wollaston Forland, North-East Greenland |
title_short |
Stratigraphy of the Upper Jurassic to lowermost Cretaceous in the Rødryggen-1 and Brorson Halvø-1 boreholes, Wollaston Forland, North-East Greenland |
title_full |
Stratigraphy of the Upper Jurassic to lowermost Cretaceous in the Rødryggen-1 and Brorson Halvø-1 boreholes, Wollaston Forland, North-East Greenland |
title_fullStr |
Stratigraphy of the Upper Jurassic to lowermost Cretaceous in the Rødryggen-1 and Brorson Halvø-1 boreholes, Wollaston Forland, North-East Greenland |
title_full_unstemmed |
Stratigraphy of the Upper Jurassic to lowermost Cretaceous in the Rødryggen-1 and Brorson Halvø-1 boreholes, Wollaston Forland, North-East Greenland |
title_sort |
stratigraphy of the upper jurassic to lowermost cretaceous in the rødryggen-1 and brorson halvø-1 boreholes, wollaston forland, north-east greenland |
publisher |
Geological Survey of Denmark and Greenland (GEUS) |
publishDate |
2023 |
url |
https://geusbulletin.org/index.php/geusb/article/view/8342 https://doi.org/10.34194/geusb.v55.8342 |
op_coverage |
Greenland |
genre |
East Greenland Greenland Wollaston forland |
genre_facet |
East Greenland Greenland Wollaston forland |
op_source |
GEUS Bulletin; Vol. 55 (2023): The Upper Jurassic – Lower Cretaceous of East and North-East Greenland: Rødryggen-1 and Brorson Halvø-1 boreholes, Wollaston Forland Basin 2597-2154 2597-2162 10.34194/geusb.v55i |
op_relation |
https://geusbulletin.org/index.php/geusb/article/view/8342/14439 https://geusbulletin.org/index.php/geusb/article/view/8342/14436 https://geusbulletin.org/index.php/geusb/article/view/8342/14438 https://geusbulletin.org/index.php/geusb/article/view/8342/14437 https://geusbulletin.org/index.php/geusb/article/view/8342/14421 https://geusbulletin.org/index.php/geusb/article/view/8342 doi:10.34194/geusb.v55.8342 |
op_rights |
Copyright (c) 2023 Peter Alsen, Stefan Piasecki, Henrik Nøhr-Hansen, Sebastian Pauly, Emma Sheldon, Jussi Hovikoski https://creativecommons.org/licenses/by/4.0 |
op_doi |
https://doi.org/10.34194/geusb.v55.834210.34194/geusb.v55i |
_version_ |
1810441744032989184 |