A new vertebrate fossil-bearing layer in the Rhætelv Formation (Kap Stewart Group) of central East Greenland:evidence of a Hettangian marine incursion into the continental Jameson Land Basin
The Kap Stewart Group (Rhaetian-Sinemurian, Triassic–Early Jurassic) of the Jameson Land Basin in central East Greenland has traditionally been regarded as a strictly continental unit with delta and perennial lake sediments. New finds of plesiosaur bone remain in a thin storm deposited sandstone bed...
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2022
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Online Access: | https://curis.ku.dk/portal/da/publications/a-new-vertebrate-fossilbearing-layer-in-the-rhaetelv-formation-kap-stewart-group-of-central-east-greenland(29d529dc-70db-469f-8e00-9b4ddca06779).html https://doi.org/10.1111/let.12449 https://curis.ku.dk/ws/files/308332222/let.12449.pdf |
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ftcopenhagenunip:oai:pure.atira.dk:publications/29d529dc-70db-469f-8e00-9b4ddca06779 2024-04-21T08:01:17+00:00 A new vertebrate fossil-bearing layer in the Rhætelv Formation (Kap Stewart Group) of central East Greenland:evidence of a Hettangian marine incursion into the continental Jameson Land Basin Clemmensen, Lars B. Lindström, Sofie Mateus, Octávio Mau, Malte Milàn, Jesper Kent, Dennis V. 2022 application/pdf https://curis.ku.dk/portal/da/publications/a-new-vertebrate-fossilbearing-layer-in-the-rhaetelv-formation-kap-stewart-group-of-central-east-greenland(29d529dc-70db-469f-8e00-9b4ddca06779).html https://doi.org/10.1111/let.12449 https://curis.ku.dk/ws/files/308332222/let.12449.pdf eng eng info:eu-repo/semantics/openAccess Clemmensen , L B , Lindström , S , Mateus , O , Mau , M , Milàn , J & Kent , D V 2022 , ' A new vertebrate fossil-bearing layer in the Rhætelv Formation (Kap Stewart Group) of central East Greenland : evidence of a Hettangian marine incursion into the continental Jameson Land Basin ' , Lethaia , vol. 55 , no. 1 . https://doi.org/10.1111/let.12449 Hettangian Jameson Land Basin Kap Stewart Group marine incursion plesiosaur article 2022 ftcopenhagenunip https://doi.org/10.1111/let.12449 2024-04-11T00:22:44Z The Kap Stewart Group (Rhaetian-Sinemurian, Triassic–Early Jurassic) of the Jameson Land Basin in central East Greenland has traditionally been regarded as a strictly continental unit with delta and perennial lake sediments. New finds of plesiosaur bone remain in a thin storm deposited sandstone bed in the middle part of the Rhætelv Formation of the Kap Stewart Group, however, indicates a likely period of marine influence. At the study area at the eastern margin of the basin, the Rhætelv Formation is 300-m thick and overlies unconformably the Norian Fleming Fjord Group. The bone-bearing sandstone occurs 190 m above the base of the group and is closely associated with black laminated mudstones; palynological investigation of three samples from these mudstones indicates that they are of a younger Hettangian age. The Hettangian was a relatively short stage (201.3–199.5 Ma) and elsewhere characterized by two episodes of sea-level highstands. Assuming that the marine incursion in the Jameson land Basin evidenced by the plesiosaur fossil remains took place during the youngest of these sea-level highstands, the bone-bearing bed of the Rhætelv Formation can be dated to 200 Ma and thereby gives the first numerical age constraint of this hitherto poorly dated succession. Article in Journal/Newspaper East Greenland Greenland University of Copenhagen: Research Lethaia 55 1 1 12 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
topic |
Hettangian Jameson Land Basin Kap Stewart Group marine incursion plesiosaur |
spellingShingle |
Hettangian Jameson Land Basin Kap Stewart Group marine incursion plesiosaur Clemmensen, Lars B. Lindström, Sofie Mateus, Octávio Mau, Malte Milàn, Jesper Kent, Dennis V. A new vertebrate fossil-bearing layer in the Rhætelv Formation (Kap Stewart Group) of central East Greenland:evidence of a Hettangian marine incursion into the continental Jameson Land Basin |
topic_facet |
Hettangian Jameson Land Basin Kap Stewart Group marine incursion plesiosaur |
description |
The Kap Stewart Group (Rhaetian-Sinemurian, Triassic–Early Jurassic) of the Jameson Land Basin in central East Greenland has traditionally been regarded as a strictly continental unit with delta and perennial lake sediments. New finds of plesiosaur bone remain in a thin storm deposited sandstone bed in the middle part of the Rhætelv Formation of the Kap Stewart Group, however, indicates a likely period of marine influence. At the study area at the eastern margin of the basin, the Rhætelv Formation is 300-m thick and overlies unconformably the Norian Fleming Fjord Group. The bone-bearing sandstone occurs 190 m above the base of the group and is closely associated with black laminated mudstones; palynological investigation of three samples from these mudstones indicates that they are of a younger Hettangian age. The Hettangian was a relatively short stage (201.3–199.5 Ma) and elsewhere characterized by two episodes of sea-level highstands. Assuming that the marine incursion in the Jameson land Basin evidenced by the plesiosaur fossil remains took place during the youngest of these sea-level highstands, the bone-bearing bed of the Rhætelv Formation can be dated to 200 Ma and thereby gives the first numerical age constraint of this hitherto poorly dated succession. |
format |
Article in Journal/Newspaper |
author |
Clemmensen, Lars B. Lindström, Sofie Mateus, Octávio Mau, Malte Milàn, Jesper Kent, Dennis V. |
author_facet |
Clemmensen, Lars B. Lindström, Sofie Mateus, Octávio Mau, Malte Milàn, Jesper Kent, Dennis V. |
author_sort |
Clemmensen, Lars B. |
title |
A new vertebrate fossil-bearing layer in the Rhætelv Formation (Kap Stewart Group) of central East Greenland:evidence of a Hettangian marine incursion into the continental Jameson Land Basin |
title_short |
A new vertebrate fossil-bearing layer in the Rhætelv Formation (Kap Stewart Group) of central East Greenland:evidence of a Hettangian marine incursion into the continental Jameson Land Basin |
title_full |
A new vertebrate fossil-bearing layer in the Rhætelv Formation (Kap Stewart Group) of central East Greenland:evidence of a Hettangian marine incursion into the continental Jameson Land Basin |
title_fullStr |
A new vertebrate fossil-bearing layer in the Rhætelv Formation (Kap Stewart Group) of central East Greenland:evidence of a Hettangian marine incursion into the continental Jameson Land Basin |
title_full_unstemmed |
A new vertebrate fossil-bearing layer in the Rhætelv Formation (Kap Stewart Group) of central East Greenland:evidence of a Hettangian marine incursion into the continental Jameson Land Basin |
title_sort |
new vertebrate fossil-bearing layer in the rhætelv formation (kap stewart group) of central east greenland:evidence of a hettangian marine incursion into the continental jameson land basin |
publishDate |
2022 |
url |
https://curis.ku.dk/portal/da/publications/a-new-vertebrate-fossilbearing-layer-in-the-rhaetelv-formation-kap-stewart-group-of-central-east-greenland(29d529dc-70db-469f-8e00-9b4ddca06779).html https://doi.org/10.1111/let.12449 https://curis.ku.dk/ws/files/308332222/let.12449.pdf |
genre |
East Greenland Greenland |
genre_facet |
East Greenland Greenland |
op_source |
Clemmensen , L B , Lindström , S , Mateus , O , Mau , M , Milàn , J & Kent , D V 2022 , ' A new vertebrate fossil-bearing layer in the Rhætelv Formation (Kap Stewart Group) of central East Greenland : evidence of a Hettangian marine incursion into the continental Jameson Land Basin ' , Lethaia , vol. 55 , no. 1 . https://doi.org/10.1111/let.12449 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/let.12449 |
container_title |
Lethaia |
container_volume |
55 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
12 |
_version_ |
1796941530829684736 |