Middle Cambrian (Miaolingian) acritarchs from the Flagg Cove Formation, Grand Manan Island, New Brunswick, Canada: stratigraphic implications and possible correlations
The upper Ediacaran to lower Cambrian Castalia Group as originally defined comprises a basal sequence of clastic marine sedimentary rocks assigned to the Great Duck Island and Flagg Cove formations and an upper sequence of mainly mafic volcanic and volcaniclastic rocks of the Ross Island, North Head...
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ftuninewbrunojs:oai:ojs.journals.lib.unb.ca:article/33694 2024-05-19T07:47:50+00:00 Middle Cambrian (Miaolingian) acritarchs from the Flagg Cove Formation, Grand Manan Island, New Brunswick, Canada: stratigraphic implications and possible correlations Acritarches du Cambrien moyen (Miaolingien) de la Formation de Flagg Cove, île Grand Manan, Nouveau-Brunswick, Canada : répercussions stratigraphiques et corrélations possibles Johnson, Susan C. White, Chris E. Palacios, Teodoro Jensen, Sören Barr, Sandra M. 2024-03-22 application/pdf https://journals.lib.unb.ca/index.php/ag/article/view/33694 eng eng Atlantic Geoscience Society https://journals.lib.unb.ca/index.php/ag/article/view/33694/1882529913 https://journals.lib.unb.ca/index.php/ag/article/view/33694 Copyright (c) 2024 Atlantic Geoscience Atlantic Geoscience; Vol. 60 (2024); 063 - 075 2564-2987 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 2024 ftuninewbrunojs 2024-04-23T23:49:19Z The upper Ediacaran to lower Cambrian Castalia Group as originally defined comprises a basal sequence of clastic marine sedimentary rocks assigned to the Great Duck Island and Flagg Cove formations and an upper sequence of mainly mafic volcanic and volcaniclastic rocks of the Ross Island, North Head, Priest Cove, and Long Pond Bay formations. A few previously reported specimens of the long-ranging trace fossil Planolites in the Flagg Cove Formation were not inconsistent with the U–Pb age of 539.0 ± 3.3 Ma age for the Priest Cove Formation or the interpreted intrusive relationship between the Flagg Cove Formation and 535 ± 2 Ma Stanley Brook Granite.During a recent visit, abundant morphologically simple trace fossils, including Planolites, were recognized in strata south of Stanley Beach in Flagg Cove, together with vertically or obliquely oriented trace fossils more than 10 mm in diameter, and probable Teichichnus. The age of this association of trace fossils is post earliest Fortunian. More significantly, grey silty shale interbedded with the sandstone that contains the traces yielded organic-walled microfossils. The microfossils include the acritarch Micrhystridium spp of a type also found in the King Square Formation in the Saint John area. The microfossils suggest a Miaolingian (middle Cambrian) age for the Flagg Cove Formation, requiring that its relationship with the Stanley Brook Granite and Castalia Group needs to be re-examined. it also raises the possibility of correlation with middle Cambrian clastic sedimentary sequences exposed on mainland southern New Brunswick and elsewhere in the region. Le groupe de l’Édiacarien supérieur au Cambrien inférieur de Castalia originalement défini est constitué d’une séquence basale de roches sédimentaires marines clastiques rattachées aux formations de Great Duck Island et de Flagg Cove ainsi qu’une séquence supérieure de roches principalement volcanomafiques et volcanoclastiques des formations de Ross Island, North Head, Priest Cove et Long Pond Bay. Les quelques ... Article in Journal/Newspaper Ross Island University of New Brunswick: Centre for Digital Scholarship Journals |
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University of New Brunswick: Centre for Digital Scholarship Journals |
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ftuninewbrunojs |
language |
English |
description |
The upper Ediacaran to lower Cambrian Castalia Group as originally defined comprises a basal sequence of clastic marine sedimentary rocks assigned to the Great Duck Island and Flagg Cove formations and an upper sequence of mainly mafic volcanic and volcaniclastic rocks of the Ross Island, North Head, Priest Cove, and Long Pond Bay formations. A few previously reported specimens of the long-ranging trace fossil Planolites in the Flagg Cove Formation were not inconsistent with the U–Pb age of 539.0 ± 3.3 Ma age for the Priest Cove Formation or the interpreted intrusive relationship between the Flagg Cove Formation and 535 ± 2 Ma Stanley Brook Granite.During a recent visit, abundant morphologically simple trace fossils, including Planolites, were recognized in strata south of Stanley Beach in Flagg Cove, together with vertically or obliquely oriented trace fossils more than 10 mm in diameter, and probable Teichichnus. The age of this association of trace fossils is post earliest Fortunian. More significantly, grey silty shale interbedded with the sandstone that contains the traces yielded organic-walled microfossils. The microfossils include the acritarch Micrhystridium spp of a type also found in the King Square Formation in the Saint John area. The microfossils suggest a Miaolingian (middle Cambrian) age for the Flagg Cove Formation, requiring that its relationship with the Stanley Brook Granite and Castalia Group needs to be re-examined. it also raises the possibility of correlation with middle Cambrian clastic sedimentary sequences exposed on mainland southern New Brunswick and elsewhere in the region. Le groupe de l’Édiacarien supérieur au Cambrien inférieur de Castalia originalement défini est constitué d’une séquence basale de roches sédimentaires marines clastiques rattachées aux formations de Great Duck Island et de Flagg Cove ainsi qu’une séquence supérieure de roches principalement volcanomafiques et volcanoclastiques des formations de Ross Island, North Head, Priest Cove et Long Pond Bay. Les quelques ... |
format |
Article in Journal/Newspaper |
author |
Johnson, Susan C. White, Chris E. Palacios, Teodoro Jensen, Sören Barr, Sandra M. |
spellingShingle |
Johnson, Susan C. White, Chris E. Palacios, Teodoro Jensen, Sören Barr, Sandra M. Middle Cambrian (Miaolingian) acritarchs from the Flagg Cove Formation, Grand Manan Island, New Brunswick, Canada: stratigraphic implications and possible correlations |
author_facet |
Johnson, Susan C. White, Chris E. Palacios, Teodoro Jensen, Sören Barr, Sandra M. |
author_sort |
Johnson, Susan C. |
title |
Middle Cambrian (Miaolingian) acritarchs from the Flagg Cove Formation, Grand Manan Island, New Brunswick, Canada: stratigraphic implications and possible correlations |
title_short |
Middle Cambrian (Miaolingian) acritarchs from the Flagg Cove Formation, Grand Manan Island, New Brunswick, Canada: stratigraphic implications and possible correlations |
title_full |
Middle Cambrian (Miaolingian) acritarchs from the Flagg Cove Formation, Grand Manan Island, New Brunswick, Canada: stratigraphic implications and possible correlations |
title_fullStr |
Middle Cambrian (Miaolingian) acritarchs from the Flagg Cove Formation, Grand Manan Island, New Brunswick, Canada: stratigraphic implications and possible correlations |
title_full_unstemmed |
Middle Cambrian (Miaolingian) acritarchs from the Flagg Cove Formation, Grand Manan Island, New Brunswick, Canada: stratigraphic implications and possible correlations |
title_sort |
middle cambrian (miaolingian) acritarchs from the flagg cove formation, grand manan island, new brunswick, canada: stratigraphic implications and possible correlations |
publisher |
Atlantic Geoscience Society |
publishDate |
2024 |
url |
https://journals.lib.unb.ca/index.php/ag/article/view/33694 |
genre |
Ross Island |
genre_facet |
Ross Island |
op_source |
Atlantic Geoscience; Vol. 60 (2024); 063 - 075 2564-2987 |
op_relation |
https://journals.lib.unb.ca/index.php/ag/article/view/33694/1882529913 https://journals.lib.unb.ca/index.php/ag/article/view/33694 |
op_rights |
Copyright (c) 2024 Atlantic Geoscience |
_version_ |
1799488312594923520 |