Short-term middle Eocene (Bartonian) paleoenvironmental changes in the sedimentary succession of Olivetta San Michele (NW Italy): the response of shallow-water biota to climate in NW Tethys
This study focuses on the paleontological content of the middle Eocene (Bartonian) carbonate-siliciclastic sediments of the Capo Mortola Calcarenite Formation from Olivetta San Michele (Liguria, Italy). Along the succession, there are significant paleoecological changes triggered by the variation in...
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Online Access: | https://hdl.handle.net/11573/1700810 https://doi.org/10.1007/s10347-023-00677-4 |
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ftunivromairis:oai:iris.uniroma1.it:11573/1700810 2024-04-14T08:18:28+00:00 Short-term middle Eocene (Bartonian) paleoenvironmental changes in the sedimentary succession of Olivetta San Michele (NW Italy): the response of shallow-water biota to climate in NW Tethys Arena, Luca Giraldo-Gómez, Victor M. Baucon, Andrea Piazza, Michele Papazzoni, Cesare A. Pignatti, Johannes Gandolfi, Antonella Briguglio, Antonino Arena, Luca Giraldo-Gómez, Victor M. Baucon, Andrea Piazza, Michele Papazzoni, Cesare A. Pignatti, Johanne Gandolfi, Antonella Briguglio, Antonino 2024 https://hdl.handle.net/11573/1700810 https://doi.org/10.1007/s10347-023-00677-4 eng eng SPRINGER place:ONE NEW YORK PLAZA, SUITE 4600, NEW YORK, NY, UNITED STATES info:eu-repo/semantics/altIdentifier/wos/WOS:001140801400001 volume:70 issue:1 numberofpages:21 journal:FACIES https://hdl.handle.net/11573/1700810 doi:10.1007/s10347-023-00677-4 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85182472924 Paleoecology Macrofauna Larger benthic foraminifera Ichnofossil Photic zone Carbonate ramp info:eu-repo/semantics/article 2024 ftunivromairis https://doi.org/10.1007/s10347-023-00677-4 2024-03-21T18:21:53Z This study focuses on the paleontological content of the middle Eocene (Bartonian) carbonate-siliciclastic sediments of the Capo Mortola Calcarenite Formation from Olivetta San Michele (Liguria, Italy). Along the succession, there are significant paleoecological changes triggered by the variation in neritic input as a consequence of tectonic and climatic instability. Among microfossils, nummulitids prevail, followed by orthophragmines, smaller benthic, and planktonic foraminifera, whereas mollusks and ichnofossils are the most abundant macrofossils. The sudden changes in the benthic communities due to the progressive increase in fluvial input are recorded throughout the sedimentary succession. An increase in water turbidity caused stressful conditions for autotrophic taxa, reducing their size and abundance. In contrast, filter feeders became dominant, suggesting an increase in dissolved and suspended nutrients. Ichnological analysis shows environmental fluctuations controlled by the transport of neritic material offshore, thus confirming the general deepening trend of the studied succession. In the upper part of the succession, we recorded an alternation between gravity flows and marly sediments that are interpreted as short-term alternations between low and intense precipitations. The gravity flows yield taxa such as larger benthic foraminifera (LBF), smaller benthic and planktonic foraminifera, mollusks, and corals. In turn, marls display only a few LBF and abundant smaller benthic and planktonic foraminifera. In these intervals, the increase in planktonic foraminifera also suggests a deepening of the carbonate ramp coinciding with a reduction of light that did not favor the development of LBF. These changes are probably related to the climatic dynamics that occurred in the Bartonian in the western Tethys. Article in Journal/Newspaper Planktonic foraminifera Sapienza Università di Roma: CINECA IRIS Facies 70 1 |
institution |
Open Polar |
collection |
Sapienza Università di Roma: CINECA IRIS |
op_collection_id |
ftunivromairis |
language |
English |
topic |
Paleoecology Macrofauna Larger benthic foraminifera Ichnofossil Photic zone Carbonate ramp |
spellingShingle |
Paleoecology Macrofauna Larger benthic foraminifera Ichnofossil Photic zone Carbonate ramp Arena, Luca Giraldo-Gómez, Victor M. Baucon, Andrea Piazza, Michele Papazzoni, Cesare A. Pignatti, Johannes Gandolfi, Antonella Briguglio, Antonino Short-term middle Eocene (Bartonian) paleoenvironmental changes in the sedimentary succession of Olivetta San Michele (NW Italy): the response of shallow-water biota to climate in NW Tethys |
topic_facet |
Paleoecology Macrofauna Larger benthic foraminifera Ichnofossil Photic zone Carbonate ramp |
description |
This study focuses on the paleontological content of the middle Eocene (Bartonian) carbonate-siliciclastic sediments of the Capo Mortola Calcarenite Formation from Olivetta San Michele (Liguria, Italy). Along the succession, there are significant paleoecological changes triggered by the variation in neritic input as a consequence of tectonic and climatic instability. Among microfossils, nummulitids prevail, followed by orthophragmines, smaller benthic, and planktonic foraminifera, whereas mollusks and ichnofossils are the most abundant macrofossils. The sudden changes in the benthic communities due to the progressive increase in fluvial input are recorded throughout the sedimentary succession. An increase in water turbidity caused stressful conditions for autotrophic taxa, reducing their size and abundance. In contrast, filter feeders became dominant, suggesting an increase in dissolved and suspended nutrients. Ichnological analysis shows environmental fluctuations controlled by the transport of neritic material offshore, thus confirming the general deepening trend of the studied succession. In the upper part of the succession, we recorded an alternation between gravity flows and marly sediments that are interpreted as short-term alternations between low and intense precipitations. The gravity flows yield taxa such as larger benthic foraminifera (LBF), smaller benthic and planktonic foraminifera, mollusks, and corals. In turn, marls display only a few LBF and abundant smaller benthic and planktonic foraminifera. In these intervals, the increase in planktonic foraminifera also suggests a deepening of the carbonate ramp coinciding with a reduction of light that did not favor the development of LBF. These changes are probably related to the climatic dynamics that occurred in the Bartonian in the western Tethys. |
author2 |
Arena, Luca Giraldo-Gómez, Victor M. Baucon, Andrea Piazza, Michele Papazzoni, Cesare A. Pignatti, Johanne Gandolfi, Antonella Briguglio, Antonino |
format |
Article in Journal/Newspaper |
author |
Arena, Luca Giraldo-Gómez, Victor M. Baucon, Andrea Piazza, Michele Papazzoni, Cesare A. Pignatti, Johannes Gandolfi, Antonella Briguglio, Antonino |
author_facet |
Arena, Luca Giraldo-Gómez, Victor M. Baucon, Andrea Piazza, Michele Papazzoni, Cesare A. Pignatti, Johannes Gandolfi, Antonella Briguglio, Antonino |
author_sort |
Arena, Luca |
title |
Short-term middle Eocene (Bartonian) paleoenvironmental changes in the sedimentary succession of Olivetta San Michele (NW Italy): the response of shallow-water biota to climate in NW Tethys |
title_short |
Short-term middle Eocene (Bartonian) paleoenvironmental changes in the sedimentary succession of Olivetta San Michele (NW Italy): the response of shallow-water biota to climate in NW Tethys |
title_full |
Short-term middle Eocene (Bartonian) paleoenvironmental changes in the sedimentary succession of Olivetta San Michele (NW Italy): the response of shallow-water biota to climate in NW Tethys |
title_fullStr |
Short-term middle Eocene (Bartonian) paleoenvironmental changes in the sedimentary succession of Olivetta San Michele (NW Italy): the response of shallow-water biota to climate in NW Tethys |
title_full_unstemmed |
Short-term middle Eocene (Bartonian) paleoenvironmental changes in the sedimentary succession of Olivetta San Michele (NW Italy): the response of shallow-water biota to climate in NW Tethys |
title_sort |
short-term middle eocene (bartonian) paleoenvironmental changes in the sedimentary succession of olivetta san michele (nw italy): the response of shallow-water biota to climate in nw tethys |
publisher |
SPRINGER |
publishDate |
2024 |
url |
https://hdl.handle.net/11573/1700810 https://doi.org/10.1007/s10347-023-00677-4 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:001140801400001 volume:70 issue:1 numberofpages:21 journal:FACIES https://hdl.handle.net/11573/1700810 doi:10.1007/s10347-023-00677-4 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85182472924 |
op_doi |
https://doi.org/10.1007/s10347-023-00677-4 |
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Facies |
container_volume |
70 |
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1 |
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1796317963120279552 |