Depositional environments and vegetation of Aptian sequences affected by volcanism in Patagonia

Autores
Limarino, Carlos Oscar; Passalia, Mauro Gabriel; Llorens, Magdalena; Vera, Ezequiel Ignacio; Perez Loinaze, Valeria Susana; Cesari, Silvia Nelida
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The continental deposits of the Baqueró Group preserve one of the most abundant Aptian floras on the southern margins of Gondwana. These floras represent an extinct biome that was subject to increasing regional volcanism. In combination with the presence of shallow water bodies, this biome provided suitable environments for the preservation of imprints and compressions of foliage together with permineralized trunks and palynofloras. Eight facies associations were identified in nine sections, characterizing the evolution of lacustrine and fluvial environments under intense volcanic activity. In addition, three depositional sequences were defined, with the purpose of establishing a chronostratigraphic framework to which the positions of the fossiliferous levels identified in the different sections can be referred. A 206Pb/238U age of 114.67 ± 0.18 Ma from the upper depositional sequence constrains the succession as no younger than the late Aptian and probably represents an interval of 4?5 Myr, during which the vegetation was affected by increasing biotic stress conditions. A qualitative analysis of the palynological assemblages and plant remains allowed a reconstruction of the dynamics of the vegetation developed during the deposition of the Baqueró Group. Volcanic activity appears to have had relatively moderate effects on the biota, at least at the Order level. Nevertheless, low species richness is observed toward the top of the Baqueró Group, reflecting an increase in adverse environmental conditions. The possible interpretations of the assemblages identified as biozones or, in contrast, biofacies related to changeable environmental conditions are discussed herein.
Fil: Limarino, Carlos Oscar. Universidad de Buenos Aires. Facultad de Cs.exactas y Naturales. Departamento de Geología. Cátedra de Sedimentologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Passalia, Mauro Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
Fil: Llorens, Magdalena. Comision Nacional de Energia Atomica. Regional Patagonia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Vera, Ezequiel Ignacio. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Cátedra de Paleontología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Perez Loinaze, Valeria Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Cesari, Silvia Nelida. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Materia
APTIAN
BAQUERÓ GROUP
SEQUENCE STRATIGRAPHY
PALYNOLOGY
MACROFLORA
PATAGONIA
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:11336/268915
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Depositional environments and vegetation of Aptian sequences affected by volcanism in PatagoniaLimarino, Carlos OscarPassalia, Mauro GabrielLlorens, MagdalenaVera, Ezequiel IgnacioPerez Loinaze, Valeria SusanaCesari, Silvia NelidaAPTIANBAQUERÓ GROUPSEQUENCE STRATIGRAPHYPALYNOLOGYMACROFLORAPATAGONIAhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The continental deposits of the Baqueró Group preserve one of the most abundant Aptian floras on the southern margins of Gondwana. These floras represent an extinct biome that was subject to increasing regional volcanism. In combination with the presence of shallow water bodies, this biome provided suitable environments for the preservation of imprints and compressions of foliage together with permineralized trunks and palynofloras. Eight facies associations were identified in nine sections, characterizing the evolution of lacustrine and fluvial environments under intense volcanic activity. In addition, three depositional sequences were defined, with the purpose of establishing a chronostratigraphic framework to which the positions of the fossiliferous levels identified in the different sections can be referred. A 206Pb/238U age of 114.67 ± 0.18 Ma from the upper depositional sequence constrains the succession as no younger than the late Aptian and probably represents an interval of 4?5 Myr, during which the vegetation was affected by increasing biotic stress conditions. A qualitative analysis of the palynological assemblages and plant remains allowed a reconstruction of the dynamics of the vegetation developed during the deposition of the Baqueró Group. Volcanic activity appears to have had relatively moderate effects on the biota, at least at the Order level. Nevertheless, low species richness is observed toward the top of the Baqueró Group, reflecting an increase in adverse environmental conditions. The possible interpretations of the assemblages identified as biozones or, in contrast, biofacies related to changeable environmental conditions are discussed herein.Fil: Limarino, Carlos Oscar. Universidad de Buenos Aires. Facultad de Cs.exactas y Naturales. Departamento de Geología. Cátedra de Sedimentologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Passalia, Mauro Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaFil: Llorens, Magdalena. Comision Nacional de Energia Atomica. Regional Patagonia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Vera, Ezequiel Ignacio. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Cátedra de Paleontología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Perez Loinaze, Valeria Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Cesari, Silvia Nelida. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaElsevier Science2012-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/268915Limarino, Carlos Oscar; Passalia, Mauro Gabriel; Llorens, Magdalena; Vera, Ezequiel Ignacio; Perez Loinaze, Valeria Susana; et al.; Depositional environments and vegetation of Aptian sequences affected by volcanism in Patagonia; Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 323-325; 3-2012; 22-410031-0182CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0031018212000351info:eu-repo/semantics/altIdentifier/doi/10.1016/j.palaeo.2012.01.021info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:08:31Zoai:ri.conicet.gov.ar:11336/268915instacron: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:34982025-09-03 10:08:31.48CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Depositional environments and vegetation of Aptian sequences affected by volcanism in Patagonia
title Depositional environments and vegetation of Aptian sequences affected by volcanism in Patagonia
spellingShingle Depositional environments and vegetation of Aptian sequences affected by volcanism in Patagonia
Limarino, Carlos Oscar
APTIAN
BAQUERÓ GROUP
SEQUENCE STRATIGRAPHY
PALYNOLOGY
MACROFLORA
PATAGONIA
title_short Depositional environments and vegetation of Aptian sequences affected by volcanism in Patagonia
title_full Depositional environments and vegetation of Aptian sequences affected by volcanism in Patagonia
title_fullStr Depositional environments and vegetation of Aptian sequences affected by volcanism in Patagonia
title_full_unstemmed Depositional environments and vegetation of Aptian sequences affected by volcanism in Patagonia
title_sort Depositional environments and vegetation of Aptian sequences affected by volcanism in Patagonia
dc.creator.none.fl_str_mv Limarino, Carlos Oscar
Passalia, Mauro Gabriel
Llorens, Magdalena
Vera, Ezequiel Ignacio
Perez Loinaze, Valeria Susana
Cesari, Silvia Nelida
author Limarino, Carlos Oscar
author_facet Limarino, Carlos Oscar
Passalia, Mauro Gabriel
Llorens, Magdalena
Vera, Ezequiel Ignacio
Perez Loinaze, Valeria Susana
Cesari, Silvia Nelida
author_role author
author2 Passalia, Mauro Gabriel
Llorens, Magdalena
Vera, Ezequiel Ignacio
Perez Loinaze, Valeria Susana
Cesari, Silvia Nelida
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv APTIAN
BAQUERÓ GROUP
SEQUENCE STRATIGRAPHY
PALYNOLOGY
MACROFLORA
PATAGONIA
topic APTIAN
BAQUERÓ GROUP
SEQUENCE STRATIGRAPHY
PALYNOLOGY
MACROFLORA
PATAGONIA
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The continental deposits of the Baqueró Group preserve one of the most abundant Aptian floras on the southern margins of Gondwana. These floras represent an extinct biome that was subject to increasing regional volcanism. In combination with the presence of shallow water bodies, this biome provided suitable environments for the preservation of imprints and compressions of foliage together with permineralized trunks and palynofloras. Eight facies associations were identified in nine sections, characterizing the evolution of lacustrine and fluvial environments under intense volcanic activity. In addition, three depositional sequences were defined, with the purpose of establishing a chronostratigraphic framework to which the positions of the fossiliferous levels identified in the different sections can be referred. A 206Pb/238U age of 114.67 ± 0.18 Ma from the upper depositional sequence constrains the succession as no younger than the late Aptian and probably represents an interval of 4?5 Myr, during which the vegetation was affected by increasing biotic stress conditions. A qualitative analysis of the palynological assemblages and plant remains allowed a reconstruction of the dynamics of the vegetation developed during the deposition of the Baqueró Group. Volcanic activity appears to have had relatively moderate effects on the biota, at least at the Order level. Nevertheless, low species richness is observed toward the top of the Baqueró Group, reflecting an increase in adverse environmental conditions. The possible interpretations of the assemblages identified as biozones or, in contrast, biofacies related to changeable environmental conditions are discussed herein.
Fil: Limarino, Carlos Oscar. Universidad de Buenos Aires. Facultad de Cs.exactas y Naturales. Departamento de Geología. Cátedra de Sedimentologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Passalia, Mauro Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
Fil: Llorens, Magdalena. Comision Nacional de Energia Atomica. Regional Patagonia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Vera, Ezequiel Ignacio. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Cátedra de Paleontología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Perez Loinaze, Valeria Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Cesari, Silvia Nelida. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
description The continental deposits of the Baqueró Group preserve one of the most abundant Aptian floras on the southern margins of Gondwana. These floras represent an extinct biome that was subject to increasing regional volcanism. In combination with the presence of shallow water bodies, this biome provided suitable environments for the preservation of imprints and compressions of foliage together with permineralized trunks and palynofloras. Eight facies associations were identified in nine sections, characterizing the evolution of lacustrine and fluvial environments under intense volcanic activity. In addition, three depositional sequences were defined, with the purpose of establishing a chronostratigraphic framework to which the positions of the fossiliferous levels identified in the different sections can be referred. A 206Pb/238U age of 114.67 ± 0.18 Ma from the upper depositional sequence constrains the succession as no younger than the late Aptian and probably represents an interval of 4?5 Myr, during which the vegetation was affected by increasing biotic stress conditions. A qualitative analysis of the palynological assemblages and plant remains allowed a reconstruction of the dynamics of the vegetation developed during the deposition of the Baqueró Group. Volcanic activity appears to have had relatively moderate effects on the biota, at least at the Order level. Nevertheless, low species richness is observed toward the top of the Baqueró Group, reflecting an increase in adverse environmental conditions. The possible interpretations of the assemblages identified as biozones or, in contrast, biofacies related to changeable environmental conditions are discussed herein.
publishDate 2012
dc.date.none.fl_str_mv 2012-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/268915
Limarino, Carlos Oscar; Passalia, Mauro Gabriel; Llorens, Magdalena; Vera, Ezequiel Ignacio; Perez Loinaze, Valeria Susana; et al.; Depositional environments and vegetation of Aptian sequences affected by volcanism in Patagonia; Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 323-325; 3-2012; 22-41
0031-0182
CONICET Digital
CONICET
url http://hdl.handle.net/11336/268915
identifier_str_mv Limarino, Carlos Oscar; Passalia, Mauro Gabriel; Llorens, Magdalena; Vera, Ezequiel Ignacio; Perez Loinaze, Valeria Susana; et al.; Depositional environments and vegetation of Aptian sequences affected by volcanism in Patagonia; Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 323-325; 3-2012; 22-41
0031-0182
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
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info:eu-repo/semantics/altIdentifier/doi/10.1016/j.palaeo.2012.01.021
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rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
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dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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