Calcareous nannofossil assemblages and their significance in defining the of the Jurassic/Cretaceous boundary

Autores
Concheyro, Graciela; Lescano, Marina Aurora
Año de publicación
2021
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
In the latest Jurassic a major speciation episode for calcareous nannofossils took place with the appearance and rapid evolution of several new genera and species. In this contribution, we analyzed the calcareous nannofossil biostratigraphy around the Jurassic/Cretaceous boundary of sections from different latitudes and paleogeographic settings. From south to north, they were the Neuquén Basin, Argentina, Sierra Madre Oriental, Mexico, and Feodosiya, Crimea. The Tithonian? Berriasian interval in the Neuquén Basin, Argentina, was represented by marine shales and limestones of the Vaca Muerta Formation deposited as a result of a rapid and generalized paleo-Pacific marine transgression. In Mexico, at the Sierra Madre Oriental, during the Tithonian to Berriasian, the development of shallow marine environment occurred, characterized by sediments of the Pimienta Formation (carbonates) and Tamaulipas Formation (argillaceous limestones, shales), respectively. In Crimea, the upper Tithonian to the lower Berriasian was represented by sediments of the Dvuyakornaya Formation, Feodosiya region, characterized by calciturbidites, debrites, and pelagic deposits from the deeper part of a distally steepened ramp. In these localities five nannofossil bio-events indicated high reliability (First Occurrences of Polycostella beckmannii, Helenea chiastia, Nannoconus wintereri, Nannoconus kamptneri minor and Nannoconus steinmannii steinmannii), and four of them indicated moderate confidence (Fist Occurences of Hexalithus noeliae, Hexalithus geometricus, Cruciellipsis cuvillieri and the Last Occurrence of P. beckmannii) determining five biozones (NJT 15, NJT 16, NJT 17, NC0, and NC1). In the three sedimentary basins, the First Occurrences of N. wintereri and N. kamptneri minor were the most confident bioevents to approximate the Jurassic/Cretaceous boundary, and they correlated the Andean with middle latitude regions, improving our knowledge about the marine connections established between the southeastern Pacific and the Tethyan Realm during those times.
Fil: Concheyro, Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Lescano, Marina Aurora. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
XII Congreso de la Asociación Paleontológica Argentina
Buenos Aires
Argentina
Asociación Paleontológica Argentina
Materia
Micropaleontology
Nannofossils
Jurassic/Cretaceous
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/173700
Acceder
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spelling Calcareous nannofossil assemblages and their significance in defining the of the Jurassic/Cretaceous boundaryConcheyro, GracielaLescano, Marina AuroraMicropaleontologyNannofossilsJurassic/Cretaceoushttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1In the latest Jurassic a major speciation episode for calcareous nannofossils took place with the appearance and rapid evolution of several new genera and species. In this contribution, we analyzed the calcareous nannofossil biostratigraphy around the Jurassic/Cretaceous boundary of sections from different latitudes and paleogeographic settings. From south to north, they were the Neuquén Basin, Argentina, Sierra Madre Oriental, Mexico, and Feodosiya, Crimea. The Tithonian? Berriasian interval in the Neuquén Basin, Argentina, was represented by marine shales and limestones of the Vaca Muerta Formation deposited as a result of a rapid and generalized paleo-Pacific marine transgression. In Mexico, at the Sierra Madre Oriental, during the Tithonian to Berriasian, the development of shallow marine environment occurred, characterized by sediments of the Pimienta Formation (carbonates) and Tamaulipas Formation (argillaceous limestones, shales), respectively. In Crimea, the upper Tithonian to the lower Berriasian was represented by sediments of the Dvuyakornaya Formation, Feodosiya region, characterized by calciturbidites, debrites, and pelagic deposits from the deeper part of a distally steepened ramp. In these localities five nannofossil bio-events indicated high reliability (First Occurrences of Polycostella beckmannii, Helenea chiastia, Nannoconus wintereri, Nannoconus kamptneri minor and Nannoconus steinmannii steinmannii), and four of them indicated moderate confidence (Fist Occurences of Hexalithus noeliae, Hexalithus geometricus, Cruciellipsis cuvillieri and the Last Occurrence of P. beckmannii) determining five biozones (NJT 15, NJT 16, NJT 17, NC0, and NC1). In the three sedimentary basins, the First Occurrences of N. wintereri and N. kamptneri minor were the most confident bioevents to approximate the Jurassic/Cretaceous boundary, and they correlated the Andean with middle latitude regions, improving our knowledge about the marine connections established between the southeastern Pacific and the Tethyan Realm during those times.Fil: Concheyro, Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; ArgentinaFil: Lescano, Marina Aurora. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; ArgentinaXII Congreso de la Asociación Paleontológica ArgentinaBuenos AiresArgentinaAsociación Paleontológica ArgentinaAsociación Paleontológica Argentina2021info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectCongresoBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/173700Calcareous nannofossil assemblages and their significance in defining the of the Jurassic/Cretaceous boundary; XII Congreso de la Asociación Paleontológica Argentina; Buenos Aires; Argentina; 2021; 1-1CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.apaleontologica.org.ar/wp-content/uploads/2022/02/XII-CAPA-Libro-de-Resu%CC%81menes-2021.pdfNacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:33:39Zoai:ri.conicet.gov.ar:11336/173700instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:33:39.968CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Calcareous nannofossil assemblages and their significance in defining the of the Jurassic/Cretaceous boundary
title Calcareous nannofossil assemblages and their significance in defining the of the Jurassic/Cretaceous boundary
spellingShingle Calcareous nannofossil assemblages and their significance in defining the of the Jurassic/Cretaceous boundary
Concheyro, Graciela
Micropaleontology
Nannofossils
Jurassic/Cretaceous
title_short Calcareous nannofossil assemblages and their significance in defining the of the Jurassic/Cretaceous boundary
title_full Calcareous nannofossil assemblages and their significance in defining the of the Jurassic/Cretaceous boundary
title_fullStr Calcareous nannofossil assemblages and their significance in defining the of the Jurassic/Cretaceous boundary
title_full_unstemmed Calcareous nannofossil assemblages and their significance in defining the of the Jurassic/Cretaceous boundary
title_sort Calcareous nannofossil assemblages and their significance in defining the of the Jurassic/Cretaceous boundary
dc.creator.none.fl_str_mv Concheyro, Graciela
Lescano, Marina Aurora
author Concheyro, Graciela
author_facet Concheyro, Graciela
Lescano, Marina Aurora
author_role author
author2 Lescano, Marina Aurora
author2_role author
dc.subject.none.fl_str_mv Micropaleontology
Nannofossils
Jurassic/Cretaceous
topic Micropaleontology
Nannofossils
Jurassic/Cretaceous
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv In the latest Jurassic a major speciation episode for calcareous nannofossils took place with the appearance and rapid evolution of several new genera and species. In this contribution, we analyzed the calcareous nannofossil biostratigraphy around the Jurassic/Cretaceous boundary of sections from different latitudes and paleogeographic settings. From south to north, they were the Neuquén Basin, Argentina, Sierra Madre Oriental, Mexico, and Feodosiya, Crimea. The Tithonian? Berriasian interval in the Neuquén Basin, Argentina, was represented by marine shales and limestones of the Vaca Muerta Formation deposited as a result of a rapid and generalized paleo-Pacific marine transgression. In Mexico, at the Sierra Madre Oriental, during the Tithonian to Berriasian, the development of shallow marine environment occurred, characterized by sediments of the Pimienta Formation (carbonates) and Tamaulipas Formation (argillaceous limestones, shales), respectively. In Crimea, the upper Tithonian to the lower Berriasian was represented by sediments of the Dvuyakornaya Formation, Feodosiya region, characterized by calciturbidites, debrites, and pelagic deposits from the deeper part of a distally steepened ramp. In these localities five nannofossil bio-events indicated high reliability (First Occurrences of Polycostella beckmannii, Helenea chiastia, Nannoconus wintereri, Nannoconus kamptneri minor and Nannoconus steinmannii steinmannii), and four of them indicated moderate confidence (Fist Occurences of Hexalithus noeliae, Hexalithus geometricus, Cruciellipsis cuvillieri and the Last Occurrence of P. beckmannii) determining five biozones (NJT 15, NJT 16, NJT 17, NC0, and NC1). In the three sedimentary basins, the First Occurrences of N. wintereri and N. kamptneri minor were the most confident bioevents to approximate the Jurassic/Cretaceous boundary, and they correlated the Andean with middle latitude regions, improving our knowledge about the marine connections established between the southeastern Pacific and the Tethyan Realm during those times.
Fil: Concheyro, Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Lescano, Marina Aurora. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
XII Congreso de la Asociación Paleontológica Argentina
Buenos Aires
Argentina
Asociación Paleontológica Argentina
description In the latest Jurassic a major speciation episode for calcareous nannofossils took place with the appearance and rapid evolution of several new genera and species. In this contribution, we analyzed the calcareous nannofossil biostratigraphy around the Jurassic/Cretaceous boundary of sections from different latitudes and paleogeographic settings. From south to north, they were the Neuquén Basin, Argentina, Sierra Madre Oriental, Mexico, and Feodosiya, Crimea. The Tithonian? Berriasian interval in the Neuquén Basin, Argentina, was represented by marine shales and limestones of the Vaca Muerta Formation deposited as a result of a rapid and generalized paleo-Pacific marine transgression. In Mexico, at the Sierra Madre Oriental, during the Tithonian to Berriasian, the development of shallow marine environment occurred, characterized by sediments of the Pimienta Formation (carbonates) and Tamaulipas Formation (argillaceous limestones, shales), respectively. In Crimea, the upper Tithonian to the lower Berriasian was represented by sediments of the Dvuyakornaya Formation, Feodosiya region, characterized by calciturbidites, debrites, and pelagic deposits from the deeper part of a distally steepened ramp. In these localities five nannofossil bio-events indicated high reliability (First Occurrences of Polycostella beckmannii, Helenea chiastia, Nannoconus wintereri, Nannoconus kamptneri minor and Nannoconus steinmannii steinmannii), and four of them indicated moderate confidence (Fist Occurences of Hexalithus noeliae, Hexalithus geometricus, Cruciellipsis cuvillieri and the Last Occurrence of P. beckmannii) determining five biozones (NJT 15, NJT 16, NJT 17, NC0, and NC1). In the three sedimentary basins, the First Occurrences of N. wintereri and N. kamptneri minor were the most confident bioevents to approximate the Jurassic/Cretaceous boundary, and they correlated the Andean with middle latitude regions, improving our knowledge about the marine connections established between the southeastern Pacific and the Tethyan Realm during those times.
publishDate 2021
dc.date.none.fl_str_mv 2021
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Congreso
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/173700
Calcareous nannofossil assemblages and their significance in defining the of the Jurassic/Cretaceous boundary; XII Congreso de la Asociación Paleontológica Argentina; Buenos Aires; Argentina; 2021; 1-1
CONICET Digital
CONICET
url http://hdl.handle.net/11336/173700
identifier_str_mv Calcareous nannofossil assemblages and their significance in defining the of the Jurassic/Cretaceous boundary; XII Congreso de la Asociación Paleontológica Argentina; Buenos Aires; Argentina; 2021; 1-1
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.apaleontologica.org.ar/wp-content/uploads/2022/02/XII-CAPA-Libro-de-Resu%CC%81menes-2021.pdf
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.coverage.none.fl_str_mv Nacional
dc.publisher.none.fl_str_mv Asociación Paleontológica Argentina
publisher.none.fl_str_mv Asociación Paleontológica Argentina
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
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reponame_str CONICET Digital (CONICET)
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instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
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repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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