Biostratigraphical and palaeobiogeographical implications of Lower Silurian Radiolaria from black cherts of the Armorican Massif (France)
A moderately well-preserved radiolarian assemblage was recovered from organic-rich black chert in a Llandovery (Lower Silurian) sequence that crops out in southern Brittany (Chalonnes-sur-Loire section, Armorican Massif, France). The assemblage is composed of two families (Rotasphaeridae and Haplota...
Published in: | Journal of Micropalaeontology |
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2014
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00019163 2023-05-15T15:07:09+02:00 Biostratigraphical and palaeobiogeographical implications of Lower Silurian Radiolaria from black cherts of the Armorican Massif (France) Tetard, Martin Danelian, Taniel Noble, Paula 2014-09 electronic https://doi.org/10.1144/jmpaleo2014-013 https://noa.gwlb.de/receive/cop_mods_00019163 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00019118/jm-33-165-2014.pdf https://jm.copernicus.org/articles/33/165/2014/jm-33-165-2014.pdf eng eng GSL Publishing Journal of Micropalaeontology -- http://www.bibliothek.uni-regensburg.de/ezeit/?2053393 -- https://www.j-micropalaeontol.net/volumes.html -- http://jm.geoscienceworld.org/ -- 2041-4978 https://doi.org/10.1144/jmpaleo2014-013 https://noa.gwlb.de/receive/cop_mods_00019163 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00019118/jm-33-165-2014.pdf https://jm.copernicus.org/articles/33/165/2014/jm-33-165-2014.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2014 ftnonlinearchiv https://doi.org/10.1144/jmpaleo2014-013 2022-02-08T22:52:48Z A moderately well-preserved radiolarian assemblage was recovered from organic-rich black chert in a Llandovery (Lower Silurian) sequence that crops out in southern Brittany (Chalonnes-sur-Loire section, Armorican Massif, France). The assemblage is composed of two families (Rotasphaeridae and Haplotaeniatidae), four genera (?Diparvapila, Secuicollacta, Orbiculopylorum, Haplotaeniatum) and 13 species. Some were identified from whole specimens preserved in silica and extracted following dilute hydrofluoric acid processing, while others were recognized in thin-section preparations, as they are beautifully preserved as ‘carbonized’ microfossils. The age range suggested by conodonts and chitinozoans yielded after HF processing from one of the 27 studied samples is in good agreement with the previously published age based on graptolites. The recovered radiolarians are discussed, documented and compared with known Rhuddanian, Aeronian and lower Telychian assemblages in the literature. The stratigraphic ranges are extended for the species Secuicollacta bipola, S. hexactinia, S. parvitesta, Orbiculopylorum granti and O. splendens based on our new data. A significant number of radiolarians found in our samples occur in Llandovery sections from Alaska, Nevada, Arctic Canada and Sweden. These similarities are used to discuss the palaeodistribution of Lower Silurian Radiolaria and our observations support the hypothesis of a wide geographical distribution for these Palaeozoic species. Article in Journal/Newspaper Arctic Alaska Niedersächsisches Online-Archiv NOA Arctic Canada Journal of Micropalaeontology 33 2 165 178 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Tetard, Martin Danelian, Taniel Noble, Paula Biostratigraphical and palaeobiogeographical implications of Lower Silurian Radiolaria from black cherts of the Armorican Massif (France) |
topic_facet |
article Verlagsveröffentlichung |
description |
A moderately well-preserved radiolarian assemblage was recovered from organic-rich black chert in a Llandovery (Lower Silurian) sequence that crops out in southern Brittany (Chalonnes-sur-Loire section, Armorican Massif, France). The assemblage is composed of two families (Rotasphaeridae and Haplotaeniatidae), four genera (?Diparvapila, Secuicollacta, Orbiculopylorum, Haplotaeniatum) and 13 species. Some were identified from whole specimens preserved in silica and extracted following dilute hydrofluoric acid processing, while others were recognized in thin-section preparations, as they are beautifully preserved as ‘carbonized’ microfossils. The age range suggested by conodonts and chitinozoans yielded after HF processing from one of the 27 studied samples is in good agreement with the previously published age based on graptolites. The recovered radiolarians are discussed, documented and compared with known Rhuddanian, Aeronian and lower Telychian assemblages in the literature. The stratigraphic ranges are extended for the species Secuicollacta bipola, S. hexactinia, S. parvitesta, Orbiculopylorum granti and O. splendens based on our new data. A significant number of radiolarians found in our samples occur in Llandovery sections from Alaska, Nevada, Arctic Canada and Sweden. These similarities are used to discuss the palaeodistribution of Lower Silurian Radiolaria and our observations support the hypothesis of a wide geographical distribution for these Palaeozoic species. |
format |
Article in Journal/Newspaper |
author |
Tetard, Martin Danelian, Taniel Noble, Paula |
author_facet |
Tetard, Martin Danelian, Taniel Noble, Paula |
author_sort |
Tetard, Martin |
title |
Biostratigraphical and palaeobiogeographical implications of Lower Silurian Radiolaria from black cherts of the Armorican Massif (France) |
title_short |
Biostratigraphical and palaeobiogeographical implications of Lower Silurian Radiolaria from black cherts of the Armorican Massif (France) |
title_full |
Biostratigraphical and palaeobiogeographical implications of Lower Silurian Radiolaria from black cherts of the Armorican Massif (France) |
title_fullStr |
Biostratigraphical and palaeobiogeographical implications of Lower Silurian Radiolaria from black cherts of the Armorican Massif (France) |
title_full_unstemmed |
Biostratigraphical and palaeobiogeographical implications of Lower Silurian Radiolaria from black cherts of the Armorican Massif (France) |
title_sort |
biostratigraphical and palaeobiogeographical implications of lower silurian radiolaria from black cherts of the armorican massif (france) |
publisher |
GSL Publishing |
publishDate |
2014 |
url |
https://doi.org/10.1144/jmpaleo2014-013 https://noa.gwlb.de/receive/cop_mods_00019163 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00019118/jm-33-165-2014.pdf https://jm.copernicus.org/articles/33/165/2014/jm-33-165-2014.pdf |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic Alaska |
genre_facet |
Arctic Alaska |
op_relation |
Journal of Micropalaeontology -- http://www.bibliothek.uni-regensburg.de/ezeit/?2053393 -- https://www.j-micropalaeontol.net/volumes.html -- http://jm.geoscienceworld.org/ -- 2041-4978 https://doi.org/10.1144/jmpaleo2014-013 https://noa.gwlb.de/receive/cop_mods_00019163 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00019118/jm-33-165-2014.pdf https://jm.copernicus.org/articles/33/165/2014/jm-33-165-2014.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1144/jmpaleo2014-013 |
container_title |
Journal of Micropalaeontology |
container_volume |
33 |
container_issue |
2 |
container_start_page |
165 |
op_container_end_page |
178 |
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1766338717397549056 |