Jurassic palynoevents in the circum-Arctic region
Successions of Jurassic strata located in the Arctic region normally yield rich assemblages of terrestriallyderived and marine palynomorphs, reflecting relatively warm air and sea-surface temperatures. The land plant floras were prone to the development of local communities and regional provincialis...
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ftuninewbrunojs:oai:ojs.journals.lib.unb.ca:article/32852 2023-05-15T14:51:53+02:00 Jurassic palynoevents in the circum-Arctic region Palynophénomènes jurassiques dans la région circumarctique Bujak, Jonathan Bringué, Manuel Goryacheva, Anna A. Lebedeva, Natalia K. Pestchevitskaya, Ekaterina B. Riding, James B. Smelror, Morten 2022-05-30 application/pdf https://journals.lib.unb.ca/index.php/ag/article/view/32852 eng eng Atlantic Geoscience Society https://journals.lib.unb.ca/index.php/ag/article/view/32852/1882528206 https://journals.lib.unb.ca/index.php/ag/article/view/32852/1882528176 https://journals.lib.unb.ca/index.php/ag/article/view/32852/1882528177 https://journals.lib.unb.ca/index.php/ag/article/view/32852/1882528178 https://journals.lib.unb.ca/index.php/ag/article/view/32852 Copyright (c) 2022 Atlantic Geoscience Atlantic Geoscience; Vol. 58 (2022); 055 - 098 2564-2987 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Special Series - CAPE Article 2022 ftuninewbrunojs 2022-12-24T23:58:28Z Successions of Jurassic strata located in the Arctic region normally yield rich assemblages of terrestriallyderived and marine palynomorphs, reflecting relatively warm air and sea-surface temperatures. The land plant floras were prone to the development of local communities and regional provincialism, whereas the marine biotas thrived across extensive open marine areas with high productivity, resulting in the rapid evolution of dinoflagellate cysts (dinocysts) following their earliest fossil record in the Triassic. Dinocysts exhibit low taxonomic richness and provide low biostratigraphic resolution throughout the Lower Jurassic sections. By contrast, they are diverse in Middle and Upper Jurassic strata where they provide excellent biostratigraphic markers for correlating and dating both surface and subsurface sections. Over twenty formal and informal biozonations based on the firstand last occurrences of dinocysts have been erected in Alaska, Arctic Canada, the Barents Sea region, Greenland and northern Russia, many of which are correlated with macrofossils, including ammonites, that occur in the same sections. This paper presents a compilation of 214 Jurassic palynostratigraphic events (118 first occurrences and 96 last occurrences) that have regional chronostratigraphic value in the Circum-Arctic, based on their published records. Each event is correlated with the base of a chronostratigraphical unit (including formal stages and sub-Boreal ammonite zones), or as an estimated percentage above the base of the chronostratigraphical unit relative to the entire unit. The relationships of each event to stages and key fossil zonal schemes is shown on chronostratigraphic plots using the 2020 version of TimeScale Creator®. Les successions de strates jurassiques dans la région de l’Arctique recèlent normalement de riches assemblages de palynomorphes d’origine terrestre et marins reflétant les températures relativement chaudes de l’air et à la surface de la mer. Les flores de plantes terrestres étaient susceptibles de ... Article in Journal/Newspaper Arctic Barents Sea Greenland Alaska University of New Brunswick: Centre for Digital Scholarship Journals Arctic Barents Sea Canada Greenland |
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Open Polar |
collection |
University of New Brunswick: Centre for Digital Scholarship Journals |
op_collection_id |
ftuninewbrunojs |
language |
English |
description |
Successions of Jurassic strata located in the Arctic region normally yield rich assemblages of terrestriallyderived and marine palynomorphs, reflecting relatively warm air and sea-surface temperatures. The land plant floras were prone to the development of local communities and regional provincialism, whereas the marine biotas thrived across extensive open marine areas with high productivity, resulting in the rapid evolution of dinoflagellate cysts (dinocysts) following their earliest fossil record in the Triassic. Dinocysts exhibit low taxonomic richness and provide low biostratigraphic resolution throughout the Lower Jurassic sections. By contrast, they are diverse in Middle and Upper Jurassic strata where they provide excellent biostratigraphic markers for correlating and dating both surface and subsurface sections. Over twenty formal and informal biozonations based on the firstand last occurrences of dinocysts have been erected in Alaska, Arctic Canada, the Barents Sea region, Greenland and northern Russia, many of which are correlated with macrofossils, including ammonites, that occur in the same sections. This paper presents a compilation of 214 Jurassic palynostratigraphic events (118 first occurrences and 96 last occurrences) that have regional chronostratigraphic value in the Circum-Arctic, based on their published records. Each event is correlated with the base of a chronostratigraphical unit (including formal stages and sub-Boreal ammonite zones), or as an estimated percentage above the base of the chronostratigraphical unit relative to the entire unit. The relationships of each event to stages and key fossil zonal schemes is shown on chronostratigraphic plots using the 2020 version of TimeScale Creator®. Les successions de strates jurassiques dans la région de l’Arctique recèlent normalement de riches assemblages de palynomorphes d’origine terrestre et marins reflétant les températures relativement chaudes de l’air et à la surface de la mer. Les flores de plantes terrestres étaient susceptibles de ... |
format |
Article in Journal/Newspaper |
author |
Bujak, Jonathan Bringué, Manuel Goryacheva, Anna A. Lebedeva, Natalia K. Pestchevitskaya, Ekaterina B. Riding, James B. Smelror, Morten |
spellingShingle |
Bujak, Jonathan Bringué, Manuel Goryacheva, Anna A. Lebedeva, Natalia K. Pestchevitskaya, Ekaterina B. Riding, James B. Smelror, Morten Jurassic palynoevents in the circum-Arctic region |
author_facet |
Bujak, Jonathan Bringué, Manuel Goryacheva, Anna A. Lebedeva, Natalia K. Pestchevitskaya, Ekaterina B. Riding, James B. Smelror, Morten |
author_sort |
Bujak, Jonathan |
title |
Jurassic palynoevents in the circum-Arctic region |
title_short |
Jurassic palynoevents in the circum-Arctic region |
title_full |
Jurassic palynoevents in the circum-Arctic region |
title_fullStr |
Jurassic palynoevents in the circum-Arctic region |
title_full_unstemmed |
Jurassic palynoevents in the circum-Arctic region |
title_sort |
jurassic palynoevents in the circum-arctic region |
publisher |
Atlantic Geoscience Society |
publishDate |
2022 |
url |
https://journals.lib.unb.ca/index.php/ag/article/view/32852 |
geographic |
Arctic Barents Sea Canada Greenland |
geographic_facet |
Arctic Barents Sea Canada Greenland |
genre |
Arctic Barents Sea Greenland Alaska |
genre_facet |
Arctic Barents Sea Greenland Alaska |
op_source |
Atlantic Geoscience; Vol. 58 (2022); 055 - 098 2564-2987 |
op_relation |
https://journals.lib.unb.ca/index.php/ag/article/view/32852/1882528206 https://journals.lib.unb.ca/index.php/ag/article/view/32852/1882528176 https://journals.lib.unb.ca/index.php/ag/article/view/32852/1882528177 https://journals.lib.unb.ca/index.php/ag/article/view/32852/1882528178 https://journals.lib.unb.ca/index.php/ag/article/view/32852 |
op_rights |
Copyright (c) 2022 Atlantic Geoscience |
_version_ |
1766323024087220224 |