The evolution of Eocene (Ypresian/Lutetian) sphenoliths: biostratigraphic implications and paleoceanographic significance from North Atlantic Site IODP U1410
Sphenoliths are a diverse and evolutionarily dynamic group of Cenozoic nannofossils which are widely used in biostratigraphic and paleoecological studies. We document the early-middle Eocene evolutionary succession of sphenoliths from IODP Site U1410 in the NW Atlantic Ocean (Southeast Newfoundland...
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Gebruder Borntraeger Verlagsbuchhandlung
2021
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ftunivpadovairis:oai:www.research.unipd.it:11577/3396458 2024-02-11T10:05:58+01:00 The evolution of Eocene (Ypresian/Lutetian) sphenoliths: biostratigraphic implications and paleoceanographic significance from North Atlantic Site IODP U1410 Cappelli, Carlotta Bown, Paul R. de Riu, Martina Agnini, Claudia Cappelli, Carlotta Bown, Paul R. de Riu, Martina Agnini, Claudia 2021 STAMPA https://hdl.handle.net/11577/3396458 https://doi.org/10.1127/nos/2020/0606 eng eng Gebruder Borntraeger Verlagsbuchhandlung info:eu-repo/semantics/altIdentifier/wos/WOS:000680240900001 volume:54 issue:4 firstpage:405 lastpage:431 numberofpages:27 journal:NEWSLETTERS ON STRATIGRAPHY https://hdl.handle.net/11577/3396458 doi:10.1127/nos/2020/0606 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85112079454 info:eu-repo/semantics/closedAccess Biostratigraphy Calcareous nannofossil Early-middle Eocene Evolution Sphenolithu info:eu-repo/semantics/article 2021 ftunivpadovairis https://doi.org/10.1127/nos/2020/0606 2024-01-24T17:52:29Z Sphenoliths are a diverse and evolutionarily dynamic group of Cenozoic nannofossils which are widely used in biostratigraphic and paleoecological studies. We document the early-middle Eocene evolutionary succession of sphenoliths from IODP Site U1410 in the NW Atlantic Ocean (Southeast Newfoundland Ridge). The exquisite nannofossil preservation at this site allows us to better delineate the morphologic and optical features of these sphenoliths and to document new fragile morphotypes. These include forms bearing long and fragile lateral processes (the ‘spiny sphenoliths’ group) that are the possible ancestors of the Sphenolithus furcatolithoides group, which is characterized by well-developed apical cycles and typically bifurcating spines. New quantitative stratigraphic analyses highlight the biostratigraphic potential of the S. furcatolithoides group throughout Zones NP14-NP15 (Martini 1971) and six key intervals characterized by shifting sphenolith assemblage compositions are identified through the early-middle Eocene. These are: 1) the post-EECO S. moriformis decrease, 2) the S. radians-S. spiniger turnover across the Ypresian-Lutetian transition, 3) the appearance and diversification of the ‘spiny sphenoliths’ group during the early Lutetian, and 4–6) development of the S. furcatolithoides evolutionary lineage, including S. pseudo-furcatolithoides (sp. nov., former S. furcatolithoides morphotype A), S. cuniculus, S. furcatolithoides (former S. furcatolithoides morphotype B) and S. strigosus. Assemblage compositions shifts and stable isotope records indicate possible environmental forcing on sphenolith evolution, suggesting the group is sensitive to changes in trophic and/or thermal conditions. Article in Journal/Newspaper Newfoundland North Atlantic Padua Research Archive (IRIS - Università degli Studi di Padova) Newsletters on Stratigraphy 54 4 405 431 |
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Open Polar |
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Padua Research Archive (IRIS - Università degli Studi di Padova) |
op_collection_id |
ftunivpadovairis |
language |
English |
topic |
Biostratigraphy Calcareous nannofossil Early-middle Eocene Evolution Sphenolithu |
spellingShingle |
Biostratigraphy Calcareous nannofossil Early-middle Eocene Evolution Sphenolithu Cappelli, Carlotta Bown, Paul R. de Riu, Martina Agnini, Claudia The evolution of Eocene (Ypresian/Lutetian) sphenoliths: biostratigraphic implications and paleoceanographic significance from North Atlantic Site IODP U1410 |
topic_facet |
Biostratigraphy Calcareous nannofossil Early-middle Eocene Evolution Sphenolithu |
description |
Sphenoliths are a diverse and evolutionarily dynamic group of Cenozoic nannofossils which are widely used in biostratigraphic and paleoecological studies. We document the early-middle Eocene evolutionary succession of sphenoliths from IODP Site U1410 in the NW Atlantic Ocean (Southeast Newfoundland Ridge). The exquisite nannofossil preservation at this site allows us to better delineate the morphologic and optical features of these sphenoliths and to document new fragile morphotypes. These include forms bearing long and fragile lateral processes (the ‘spiny sphenoliths’ group) that are the possible ancestors of the Sphenolithus furcatolithoides group, which is characterized by well-developed apical cycles and typically bifurcating spines. New quantitative stratigraphic analyses highlight the biostratigraphic potential of the S. furcatolithoides group throughout Zones NP14-NP15 (Martini 1971) and six key intervals characterized by shifting sphenolith assemblage compositions are identified through the early-middle Eocene. These are: 1) the post-EECO S. moriformis decrease, 2) the S. radians-S. spiniger turnover across the Ypresian-Lutetian transition, 3) the appearance and diversification of the ‘spiny sphenoliths’ group during the early Lutetian, and 4–6) development of the S. furcatolithoides evolutionary lineage, including S. pseudo-furcatolithoides (sp. nov., former S. furcatolithoides morphotype A), S. cuniculus, S. furcatolithoides (former S. furcatolithoides morphotype B) and S. strigosus. Assemblage compositions shifts and stable isotope records indicate possible environmental forcing on sphenolith evolution, suggesting the group is sensitive to changes in trophic and/or thermal conditions. |
author2 |
Cappelli, Carlotta Bown, Paul R. de Riu, Martina Agnini, Claudia |
format |
Article in Journal/Newspaper |
author |
Cappelli, Carlotta Bown, Paul R. de Riu, Martina Agnini, Claudia |
author_facet |
Cappelli, Carlotta Bown, Paul R. de Riu, Martina Agnini, Claudia |
author_sort |
Cappelli, Carlotta |
title |
The evolution of Eocene (Ypresian/Lutetian) sphenoliths: biostratigraphic implications and paleoceanographic significance from North Atlantic Site IODP U1410 |
title_short |
The evolution of Eocene (Ypresian/Lutetian) sphenoliths: biostratigraphic implications and paleoceanographic significance from North Atlantic Site IODP U1410 |
title_full |
The evolution of Eocene (Ypresian/Lutetian) sphenoliths: biostratigraphic implications and paleoceanographic significance from North Atlantic Site IODP U1410 |
title_fullStr |
The evolution of Eocene (Ypresian/Lutetian) sphenoliths: biostratigraphic implications and paleoceanographic significance from North Atlantic Site IODP U1410 |
title_full_unstemmed |
The evolution of Eocene (Ypresian/Lutetian) sphenoliths: biostratigraphic implications and paleoceanographic significance from North Atlantic Site IODP U1410 |
title_sort |
evolution of eocene (ypresian/lutetian) sphenoliths: biostratigraphic implications and paleoceanographic significance from north atlantic site iodp u1410 |
publisher |
Gebruder Borntraeger Verlagsbuchhandlung |
publishDate |
2021 |
url |
https://hdl.handle.net/11577/3396458 https://doi.org/10.1127/nos/2020/0606 |
genre |
Newfoundland North Atlantic |
genre_facet |
Newfoundland North Atlantic |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000680240900001 volume:54 issue:4 firstpage:405 lastpage:431 numberofpages:27 journal:NEWSLETTERS ON STRATIGRAPHY https://hdl.handle.net/11577/3396458 doi:10.1127/nos/2020/0606 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85112079454 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1127/nos/2020/0606 |
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