New data on the carbonate microfacies from the upper Cenomanian of the Baixo Mondego region (Beira Litoral, Portugal)..
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/32837 |
Resumo: | Th e Baixo Mondego region in western Portugal is reknown to expose a large record of middle to upper Cenomanian and lower Turonian platform carbonates with rich fossil assemblages. Th ere is a huge variety of microfacies that suggests a rather complex palaeo-environmental setting. Several workers initiated their study since the 1960s, but the available information now require being complemented with new relevant bio-stratigraphic and palaeo-ecological data. Within this scope, the upper Cenomanian carbonate levels “C” to “J” of the Costa d’Arnes Formation were sampled from stratigraphic sections located between the localities of Salmanha, Vila Verde and Lares. A representative collection of 85 thin sections was then prepared for a micropalaeontological study completed in both the Earth Sciences Department of the New University of Lisbon and the University of Vigo. Subsequently, the following planktonic foraminifers were identifi ed in bioclast-rich, wackstone-packstone, carbonate microfacies: Hedbergella delrioensis, Heterohelix sp., Guembelitria cretacea, Helvetoglobotruncana praehelvetica, Rotalipora cushmani, Whiteinella spp., Dicarinella sp., and Praeglobotruncana delrioensis. Th ey occur together with the benthonic foraminifers: Th omasinella punica, Placopsilina cenomana, Hemicyclammina sigali, Gavelinella sp., Marssonella oxycona, Dorothia sp., and Ammobaculites spp., and forms attributed to Lenticulina, Quinqueloculina and Nautiloculina. Other bioclasts include abundant dasycladacean algae and small fragments of invertebrates, including sponges, bryozoans, bivalves, gastropods, serpulid worms, echinoids, and crinoids. Th ese Tethysian-infl uenced assemblages indicate the presence of a rather distal, mid- to outer-shelf environment with open marine conditions. |
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New data on the carbonate microfacies from the upper Cenomanian of the Baixo Mondego region (Beira Litoral, Portugal)..Baixo MondegoCenomanianMicrofossil assemblagesOuter shelfPalaeoenvironmentWestern PortugalTh e Baixo Mondego region in western Portugal is reknown to expose a large record of middle to upper Cenomanian and lower Turonian platform carbonates with rich fossil assemblages. Th ere is a huge variety of microfacies that suggests a rather complex palaeo-environmental setting. Several workers initiated their study since the 1960s, but the available information now require being complemented with new relevant bio-stratigraphic and palaeo-ecological data. Within this scope, the upper Cenomanian carbonate levels “C” to “J” of the Costa d’Arnes Formation were sampled from stratigraphic sections located between the localities of Salmanha, Vila Verde and Lares. A representative collection of 85 thin sections was then prepared for a micropalaeontological study completed in both the Earth Sciences Department of the New University of Lisbon and the University of Vigo. Subsequently, the following planktonic foraminifers were identifi ed in bioclast-rich, wackstone-packstone, carbonate microfacies: Hedbergella delrioensis, Heterohelix sp., Guembelitria cretacea, Helvetoglobotruncana praehelvetica, Rotalipora cushmani, Whiteinella spp., Dicarinella sp., and Praeglobotruncana delrioensis. Th ey occur together with the benthonic foraminifers: Th omasinella punica, Placopsilina cenomana, Hemicyclammina sigali, Gavelinella sp., Marssonella oxycona, Dorothia sp., and Ammobaculites spp., and forms attributed to Lenticulina, Quinqueloculina and Nautiloculina. Other bioclasts include abundant dasycladacean algae and small fragments of invertebrates, including sponges, bryozoans, bivalves, gastropods, serpulid worms, echinoids, and crinoids. Th ese Tethysian-infl uenced assemblages indicate the presence of a rather distal, mid- to outer-shelf environment with open marine conditions.2022-12-06T15:28:04Z2022-12-062022-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjecthttp://hdl.handle.net/10174/32837http://hdl.handle.net/10174/32837engIn: Moncunill-Solé B, Carrillo-Barral N. & Blanco A (eds.). Paleontological Research Lines in the Northwest of Iberian Peninsula. A Coruña, Spain, pp.naonaosimMetaleicca666@hotmail.comndndacaceres@uevora.ptndndndISBN: 978-84-09-46113-4Rodríguez-Gómez, EFerré B., BCallapez, P.M.Balbino, ALegoinha, P.Garnier, BMarino, G.info: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:RCAAP2024-01-03T19:33:54Zoai:dspace.uevora.pt:10174/32837Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:21:46.031078Repositório 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 |
New data on the carbonate microfacies from the upper Cenomanian of the Baixo Mondego region (Beira Litoral, Portugal).. |
title |
New data on the carbonate microfacies from the upper Cenomanian of the Baixo Mondego region (Beira Litoral, Portugal).. |
spellingShingle |
New data on the carbonate microfacies from the upper Cenomanian of the Baixo Mondego region (Beira Litoral, Portugal).. Rodríguez-Gómez, E Baixo Mondego Cenomanian Microfossil assemblages Outer shelf Palaeoenvironment Western Portugal |
title_short |
New data on the carbonate microfacies from the upper Cenomanian of the Baixo Mondego region (Beira Litoral, Portugal).. |
title_full |
New data on the carbonate microfacies from the upper Cenomanian of the Baixo Mondego region (Beira Litoral, Portugal).. |
title_fullStr |
New data on the carbonate microfacies from the upper Cenomanian of the Baixo Mondego region (Beira Litoral, Portugal).. |
title_full_unstemmed |
New data on the carbonate microfacies from the upper Cenomanian of the Baixo Mondego region (Beira Litoral, Portugal).. |
title_sort |
New data on the carbonate microfacies from the upper Cenomanian of the Baixo Mondego region (Beira Litoral, Portugal).. |
author |
Rodríguez-Gómez, E |
author_facet |
Rodríguez-Gómez, E Ferré B., B Callapez, P.M. Balbino, A Legoinha, P. Garnier, B Marino, G. |
author_role |
author |
author2 |
Ferré B., B Callapez, P.M. Balbino, A Legoinha, P. Garnier, B Marino, G. |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Rodríguez-Gómez, E Ferré B., B Callapez, P.M. Balbino, A Legoinha, P. Garnier, B Marino, G. |
dc.subject.por.fl_str_mv |
Baixo Mondego Cenomanian Microfossil assemblages Outer shelf Palaeoenvironment Western Portugal |
topic |
Baixo Mondego Cenomanian Microfossil assemblages Outer shelf Palaeoenvironment Western Portugal |
description |
Th e Baixo Mondego region in western Portugal is reknown to expose a large record of middle to upper Cenomanian and lower Turonian platform carbonates with rich fossil assemblages. Th ere is a huge variety of microfacies that suggests a rather complex palaeo-environmental setting. Several workers initiated their study since the 1960s, but the available information now require being complemented with new relevant bio-stratigraphic and palaeo-ecological data. Within this scope, the upper Cenomanian carbonate levels “C” to “J” of the Costa d’Arnes Formation were sampled from stratigraphic sections located between the localities of Salmanha, Vila Verde and Lares. A representative collection of 85 thin sections was then prepared for a micropalaeontological study completed in both the Earth Sciences Department of the New University of Lisbon and the University of Vigo. Subsequently, the following planktonic foraminifers were identifi ed in bioclast-rich, wackstone-packstone, carbonate microfacies: Hedbergella delrioensis, Heterohelix sp., Guembelitria cretacea, Helvetoglobotruncana praehelvetica, Rotalipora cushmani, Whiteinella spp., Dicarinella sp., and Praeglobotruncana delrioensis. Th ey occur together with the benthonic foraminifers: Th omasinella punica, Placopsilina cenomana, Hemicyclammina sigali, Gavelinella sp., Marssonella oxycona, Dorothia sp., and Ammobaculites spp., and forms attributed to Lenticulina, Quinqueloculina and Nautiloculina. Other bioclasts include abundant dasycladacean algae and small fragments of invertebrates, including sponges, bryozoans, bivalves, gastropods, serpulid worms, echinoids, and crinoids. Th ese Tethysian-infl uenced assemblages indicate the presence of a rather distal, mid- to outer-shelf environment with open marine conditions. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-12-06T15:28:04Z 2022-12-06 2022-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10174/32837 http://hdl.handle.net/10174/32837 |
url |
http://hdl.handle.net/10174/32837 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
In: Moncunill-Solé B, Carrillo-Barral N. & Blanco A (eds.). Paleontological Research Lines in the Northwest of Iberian Peninsula. A Coruña, Spain, pp. nao nao sim Metaleicca666@hotmail.com nd nd acaceres@uevora.pt nd nd nd ISBN: 978-84-09-46113-4 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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