Foraminiferal morphogroups in dysoxic shelf deposits from the Jurassic of Spitsbergen
Analysis of benthic foraminiferal assemblages was performed in Bathonian to Kimmeridgian deposits through a section covering the lower half of the Agardhfjellet Formation in central Spitsbergen. The section consists mainly of organic-rich shales, which contain low-diversity agglutinated assemblages....
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2009
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ftunivgranada:oai:digibug.ugr.es:10481/32286 2023-05-15T18:02:43+02:00 Foraminiferal morphogroups in dysoxic shelf deposits from the Jurassic of Spitsbergen Nagy, Jenö Reolid, Matías Rodríguez Tovar, Francisco J. 2009 application/pdf http://hdl.handle.net/10481/32286 https://doi.org/10.1111/j.1751-8369.2009.00112.x eng eng Co-Action Publishing Nagy, J.; Reolid, M.; Rodríguez-Tovar, F.J. Foraminiferal morphogroups in dysoxic shelf deposits from the Jurassic of Spitsbergen. Polar Research, 28(2): 214-221 (2009). [http://hdl.handle.net/10481/32286] 1751-8369 http://hdl.handle.net/10481/32286 doi:10.1111/j.1751-8369.2009.00112.x Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License http://creativecommons.org/licenses/by-nc-nd/3.0/ info:eu-repo/semantics/openAccess CC-BY-NC-ND Foraminifera Jurassic Morphogroups Microhabitats Palaeoenvironments Spitsbergen info:eu-repo/semantics/article 2009 ftunivgranada https://doi.org/10.1111/j.1751-8369.2009.00112.x 2020-03-31T23:19:44Z Analysis of benthic foraminiferal assemblages was performed in Bathonian to Kimmeridgian deposits through a section covering the lower half of the Agardhfjellet Formation in central Spitsbergen. The section consists mainly of organic-rich shales, which contain low-diversity agglutinated assemblages. In this foraminiferal succession five morphogroups were differentiated according to shell architecture (general shape, mode of coiling and number of chambers), integrated with the supposed microhabitat (epifaunal, shallow infaunal and deep infaunal) and feeding strategy (suspension-feeder, herbivore, bacterivore, etc.). The environmental evolution of the analysed section is interpreted by using the stratigraphic distribution of morphogroups, combined with species diversities and sedimentary data, in a sequence stratigraphic framework. The section comprises two depositional sequences, which demonstrate that species diversity and relative frequency of morphogroups are correlative with transgressive–regressive trends controlling depth and oxygenation of the water column. In both sequences, the maximum flooding interval is characterized by increased organic carbon content, dominance of the epifaunal morphogroups and reduced species diversity: features reflecting the increased degree of stagnation separating the transgressive phase from the regressive phase. The participation of J. Nagy in this research has been supported by the Statoil/Hydro VISTA programme. The contribution of M. Reolid and F.J. Rodríguez-Tovar has been supported by the projects CGL2005-06636-C0201 and CGL2005-0316/BTE, the EMMI group (RNM-178, Junta de Andalucía) and the Acción Integrada 30.AI.PO.1300 (University of Granada–University of Oslo). A grant of the Universidad de Jaén financed M. Reolid’s short stay at the University of Oslo. Article in Journal/Newspaper Polar Research Spitsbergen DIGIBUG: Repositorio Institucional de la Universidad de Granada Agardhfjellet ENVELOPE(18.833,18.833,78.083,78.083) Polar Research 28 2 214 221 |
institution |
Open Polar |
collection |
DIGIBUG: Repositorio Institucional de la Universidad de Granada |
op_collection_id |
ftunivgranada |
language |
English |
topic |
Foraminifera Jurassic Morphogroups Microhabitats Palaeoenvironments Spitsbergen |
spellingShingle |
Foraminifera Jurassic Morphogroups Microhabitats Palaeoenvironments Spitsbergen Nagy, Jenö Reolid, Matías Rodríguez Tovar, Francisco J. Foraminiferal morphogroups in dysoxic shelf deposits from the Jurassic of Spitsbergen |
topic_facet |
Foraminifera Jurassic Morphogroups Microhabitats Palaeoenvironments Spitsbergen |
description |
Analysis of benthic foraminiferal assemblages was performed in Bathonian to Kimmeridgian deposits through a section covering the lower half of the Agardhfjellet Formation in central Spitsbergen. The section consists mainly of organic-rich shales, which contain low-diversity agglutinated assemblages. In this foraminiferal succession five morphogroups were differentiated according to shell architecture (general shape, mode of coiling and number of chambers), integrated with the supposed microhabitat (epifaunal, shallow infaunal and deep infaunal) and feeding strategy (suspension-feeder, herbivore, bacterivore, etc.). The environmental evolution of the analysed section is interpreted by using the stratigraphic distribution of morphogroups, combined with species diversities and sedimentary data, in a sequence stratigraphic framework. The section comprises two depositional sequences, which demonstrate that species diversity and relative frequency of morphogroups are correlative with transgressive–regressive trends controlling depth and oxygenation of the water column. In both sequences, the maximum flooding interval is characterized by increased organic carbon content, dominance of the epifaunal morphogroups and reduced species diversity: features reflecting the increased degree of stagnation separating the transgressive phase from the regressive phase. The participation of J. Nagy in this research has been supported by the Statoil/Hydro VISTA programme. The contribution of M. Reolid and F.J. Rodríguez-Tovar has been supported by the projects CGL2005-06636-C0201 and CGL2005-0316/BTE, the EMMI group (RNM-178, Junta de Andalucía) and the Acción Integrada 30.AI.PO.1300 (University of Granada–University of Oslo). A grant of the Universidad de Jaén financed M. Reolid’s short stay at the University of Oslo. |
format |
Article in Journal/Newspaper |
author |
Nagy, Jenö Reolid, Matías Rodríguez Tovar, Francisco J. |
author_facet |
Nagy, Jenö Reolid, Matías Rodríguez Tovar, Francisco J. |
author_sort |
Nagy, Jenö |
title |
Foraminiferal morphogroups in dysoxic shelf deposits from the Jurassic of Spitsbergen |
title_short |
Foraminiferal morphogroups in dysoxic shelf deposits from the Jurassic of Spitsbergen |
title_full |
Foraminiferal morphogroups in dysoxic shelf deposits from the Jurassic of Spitsbergen |
title_fullStr |
Foraminiferal morphogroups in dysoxic shelf deposits from the Jurassic of Spitsbergen |
title_full_unstemmed |
Foraminiferal morphogroups in dysoxic shelf deposits from the Jurassic of Spitsbergen |
title_sort |
foraminiferal morphogroups in dysoxic shelf deposits from the jurassic of spitsbergen |
publisher |
Co-Action Publishing |
publishDate |
2009 |
url |
http://hdl.handle.net/10481/32286 https://doi.org/10.1111/j.1751-8369.2009.00112.x |
long_lat |
ENVELOPE(18.833,18.833,78.083,78.083) |
geographic |
Agardhfjellet |
geographic_facet |
Agardhfjellet |
genre |
Polar Research Spitsbergen |
genre_facet |
Polar Research Spitsbergen |
op_relation |
Nagy, J.; Reolid, M.; Rodríguez-Tovar, F.J. Foraminiferal morphogroups in dysoxic shelf deposits from the Jurassic of Spitsbergen. Polar Research, 28(2): 214-221 (2009). [http://hdl.handle.net/10481/32286] 1751-8369 http://hdl.handle.net/10481/32286 doi:10.1111/j.1751-8369.2009.00112.x |
op_rights |
Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License http://creativecommons.org/licenses/by-nc-nd/3.0/ info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1111/j.1751-8369.2009.00112.x |
container_title |
Polar Research |
container_volume |
28 |
container_issue |
2 |
container_start_page |
214 |
op_container_end_page |
221 |
_version_ |
1766173277486579712 |