Ostracodes; witnesses of the Plio-Quaternary boundary in the North Eastern Atlantic preliminary results

Detalhes bibliográficos
Autor(a) principal: Braccini, E.
Data de Publicação: 1992
Outros Autores: Carbonel, P., Vayssières, V., Courbouleix, S.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10362/4594
Resumo: Proceedings of the 1" R.C.A.N.S. Congress, Lisboa, October 1992
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spelling Ostracodes; witnesses of the Plio-Quaternary boundary in the North Eastern Atlantic preliminary resultsOstracodesMorphological variabilitySeasonal contrastsClimatic changePlio-PleistoceneProceedings of the 1" R.C.A.N.S. Congress, Lisboa, October 1992The 2,4 MY crisis is an important event for the upper Neogene ofNorth Atlantic. A new climatic system occur and widespread during the Quaternary and is characterized by glacial and interglacial alternance. To follow the different steps of this crisis, we have choosen a borehole situated in the Cotentin peninsula (Normandy, France) and used ostracodes such as markers. The interpretation of quantitative and qualitative data from the ostracode fauna analysis shows that bathymetry was around 40 and 60 meters with slight fluctuations, excepted during Praetiglian event where the zone was outofwater. The morphologicalvariability analysis offour species (the best represented in the core), show a low variability between the basement and 80 meters. Beyond this limit and after 10 meters, characterized by very low values, the variability increases to very high values to the top of the core. Present data; Abe et Choe, 1988; Peypouquet et al, 1988; Carbonel et al., 1990 a, 1990 b; show that there is a close link between seasonal contrast intensity and ostracode intraspecifical morphological variations. The carbonates balance at the interface water / sediment, were ostracodes live and moult, is related and reflects the intensity of the seasonal contrast. After the Praetiglian event, an increase of the seasonal contrast occurs during the Tiglian A and the lower Tiglian B.RUNBraccini, E.Carbonel, P.Vayssières, V.Courbouleix, S.2010-12-14T19:05:10Z19921992-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10362/4594enginfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T03:34:28Zoai:run.unl.pt:10362/4594Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:15:47.089822Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Ostracodes; witnesses of the Plio-Quaternary boundary in the North Eastern Atlantic preliminary results
title Ostracodes; witnesses of the Plio-Quaternary boundary in the North Eastern Atlantic preliminary results
spellingShingle Ostracodes; witnesses of the Plio-Quaternary boundary in the North Eastern Atlantic preliminary results
Braccini, E.
Ostracodes
Morphological variability
Seasonal contrasts
Climatic change
Plio-Pleistocene
title_short Ostracodes; witnesses of the Plio-Quaternary boundary in the North Eastern Atlantic preliminary results
title_full Ostracodes; witnesses of the Plio-Quaternary boundary in the North Eastern Atlantic preliminary results
title_fullStr Ostracodes; witnesses of the Plio-Quaternary boundary in the North Eastern Atlantic preliminary results
title_full_unstemmed Ostracodes; witnesses of the Plio-Quaternary boundary in the North Eastern Atlantic preliminary results
title_sort Ostracodes; witnesses of the Plio-Quaternary boundary in the North Eastern Atlantic preliminary results
author Braccini, E.
author_facet Braccini, E.
Carbonel, P.
Vayssières, V.
Courbouleix, S.
author_role author
author2 Carbonel, P.
Vayssières, V.
Courbouleix, S.
author2_role author
author
author
dc.contributor.none.fl_str_mv RUN
dc.contributor.author.fl_str_mv Braccini, E.
Carbonel, P.
Vayssières, V.
Courbouleix, S.
dc.subject.por.fl_str_mv Ostracodes
Morphological variability
Seasonal contrasts
Climatic change
Plio-Pleistocene
topic Ostracodes
Morphological variability
Seasonal contrasts
Climatic change
Plio-Pleistocene
description Proceedings of the 1" R.C.A.N.S. Congress, Lisboa, October 1992
publishDate 1992
dc.date.none.fl_str_mv 1992
1992-01-01T00:00:00Z
2010-12-14T19:05:10Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10362/4594
url http://hdl.handle.net/10362/4594
dc.language.iso.fl_str_mv eng
language eng
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dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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