Depositional sequences and ammonoid assemblages in the upper Cenomanian-lower Santonian of the Iberian Peninsula (Spain and Portugal)

A clear relationship exists between eustatic sea-level rises and falls recorded as cyclical depositional sequences and ammonite faunas during the Cenomanian-Santonian in the Iberian and West Portuguese basins. Most of the faunal turnovers correlate with stratigraphic intervals related to marine tran...

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Detalles Bibliográficos
Autores: Segura, Manuel, Barroso Barcenilla, Fernando, Callapez, Pedro Miguel, García Hidalgo, J.F., Gil Gil, Javier
Tipo de recurso: artículo
Fecha de publicación:2014
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/34445
Acceso en línea:https://hdl.handle.net/20.500.14352/34445
Access Level:acceso abierto
Palabra clave:564.53(46)
Depositional sequences
Ammonoid assemblages
Upper Cenomanian-lower Santonian
Spain
Portugal
Paleontología
2416 Paleontología
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oai_identifier_str oai:docta.ucm.es:20.500.14352/34445
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spelling Depositional sequences and ammonoid assemblages in the upper Cenomanian-lower Santonian of the Iberian Peninsula (Spain and Portugal)Segura, ManuelBarroso Barcenilla, FernandoCallapez, Pedro MiguelGarcía Hidalgo, J.F.Gil Gil, Javier564.53(46)Depositional sequencesAmmonoid assemblagesUpper Cenomanian-lower SantonianSpainPortugalPaleontología2416 PaleontologíaA clear relationship exists between eustatic sea-level rises and falls recorded as cyclical depositional sequences and ammonite faunas during the Cenomanian-Santonian in the Iberian and West Portuguese basins. Most of the faunal turnovers correlate with stratigraphic intervals related to marine transgressions, maximum flooding of the shelf (locally associated to anoxic events), and marine regressions. Specifically, within each depositional sequence, three distinct and identical events of morphological change occur, involving ammonoids belonging to different groups. Transgressive sediments are characterized by moderately ornamented, inflated and evolute morphologies, which are replaced by smooth, involute and compressed oxycones (the most hydrodynamic shells) during maximum flooding (and to a lesser extent at the early highstand) of the sequences. The latter morphologies in turn are replaced by coarsely ornamented and evolute shells during late highstands. We conclude that ammonoid faunal analysis can be used to trace sea-level changes and provides an additional tool for sequence stratigraphy.Instituto de Ciencias de la Tierra "Jaume Almera" (Barcelona)Universidad Complutense de Madrid20142014-01-0120142014-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/34445reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/344452026-06-02T12:44:21Z
dc.title.none.fl_str_mv Depositional sequences and ammonoid assemblages in the upper Cenomanian-lower Santonian of the Iberian Peninsula (Spain and Portugal)
title Depositional sequences and ammonoid assemblages in the upper Cenomanian-lower Santonian of the Iberian Peninsula (Spain and Portugal)
spellingShingle Depositional sequences and ammonoid assemblages in the upper Cenomanian-lower Santonian of the Iberian Peninsula (Spain and Portugal)
Segura, Manuel
564.53(46)
Depositional sequences
Ammonoid assemblages
Upper Cenomanian-lower Santonian
Spain
Portugal
Paleontología
2416 Paleontología
title_short Depositional sequences and ammonoid assemblages in the upper Cenomanian-lower Santonian of the Iberian Peninsula (Spain and Portugal)
title_full Depositional sequences and ammonoid assemblages in the upper Cenomanian-lower Santonian of the Iberian Peninsula (Spain and Portugal)
title_fullStr Depositional sequences and ammonoid assemblages in the upper Cenomanian-lower Santonian of the Iberian Peninsula (Spain and Portugal)
title_full_unstemmed Depositional sequences and ammonoid assemblages in the upper Cenomanian-lower Santonian of the Iberian Peninsula (Spain and Portugal)
title_sort Depositional sequences and ammonoid assemblages in the upper Cenomanian-lower Santonian of the Iberian Peninsula (Spain and Portugal)
dc.creator.none.fl_str_mv Segura, Manuel
Barroso Barcenilla, Fernando
Callapez, Pedro Miguel
García Hidalgo, J.F.
Gil Gil, Javier
author Segura, Manuel
author_facet Segura, Manuel
Barroso Barcenilla, Fernando
Callapez, Pedro Miguel
García Hidalgo, J.F.
Gil Gil, Javier
author_role author
author2 Barroso Barcenilla, Fernando
Callapez, Pedro Miguel
García Hidalgo, J.F.
Gil Gil, Javier
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 564.53(46)
Depositional sequences
Ammonoid assemblages
Upper Cenomanian-lower Santonian
Spain
Portugal
Paleontología
2416 Paleontología
topic 564.53(46)
Depositional sequences
Ammonoid assemblages
Upper Cenomanian-lower Santonian
Spain
Portugal
Paleontología
2416 Paleontología
description A clear relationship exists between eustatic sea-level rises and falls recorded as cyclical depositional sequences and ammonite faunas during the Cenomanian-Santonian in the Iberian and West Portuguese basins. Most of the faunal turnovers correlate with stratigraphic intervals related to marine transgressions, maximum flooding of the shelf (locally associated to anoxic events), and marine regressions. Specifically, within each depositional sequence, three distinct and identical events of morphological change occur, involving ammonoids belonging to different groups. Transgressive sediments are characterized by moderately ornamented, inflated and evolute morphologies, which are replaced by smooth, involute and compressed oxycones (the most hydrodynamic shells) during maximum flooding (and to a lesser extent at the early highstand) of the sequences. The latter morphologies in turn are replaced by coarsely ornamented and evolute shells during late highstands. We conclude that ammonoid faunal analysis can be used to trace sea-level changes and provides an additional tool for sequence stratigraphy.
publishDate 2014
dc.date.none.fl_str_mv 2014
2014-01-01
2014
2014-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/34445
url https://hdl.handle.net/20.500.14352/34445
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Instituto de Ciencias de la Tierra "Jaume Almera" (Barcelona)
publisher.none.fl_str_mv Instituto de Ciencias de la Tierra "Jaume Almera" (Barcelona)
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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