Middle Eocene Dinoflagellate cysts from Santa Cruz Providence, Argentina: Biostratigraphy and Paleoenvironment
- Autores
- González Estebenet, María Sol; Guerstein, Gladys Raquel; Rodriguez Raising, Martin Eduardo
- Año de publicación
- 2014
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The upper member of the Río Turbio Formation is a well-exposed marine Eocene unit at high latitudes in Patagonia, Argentina. It holds important information helpful to reconstruct regional climate and oceanographic patterns in an area adjacent to the Drake Passage. Knowledge on the paleoenvironmental and paleoceanographic evolution of the southwestern Atlantic Ocean during the Paleogene is hindered by the lack of precise tools to date and correlate the sedimentary units. In this paperwe present the dinoflagellate cyst assemblages fromthe upper member of the Río Turbio Formation and compare the stratigraphic distribution of their species with the ranges proposed in the Paleogene Southern Pacific Ocean dinoflagellate cyst zonation. The abundance of Enneadocysta dictyostila, the first occurrence of Impagidinium parvireticulatum and the presence of Vozzhennikovia apertura all allow us to propose a mid-Lutetian to mid-Priabonian age (44.6 to 34 Ma) for the upper member of the Río Turbio Formation. The study section is characterized by amiddle Eocene endemic-Antarctic dinocyst assemblage. According to the dinocyst assemblages the analyzed section can be divided into four zones. Zone I is dominated by E. dictyostila, which points to a distal setting in an inner shelf environment. Zone II exhibits a high abundance of V. apertura, thus suggesting high trophic levels and coolwaters in a shallow-marine, coastal environment. Zone III is dominated by I. parvireticulatum and a lower abundance of E. dictyostila, both species indicating a possible deepening of the depositional area with increasing influence of oceanic waters. Finally, Zone IV is dominated by V. apertura, indicating shallow marine waters. Our data suggest that V. apertura could have been produced by a stress-tolerant dinoflagellate species. Toward the top of the section, the samples are dominated exclusively by sporomorphs and zygospores of fresh-water green algae, which indicate a transition from a tide-dominated deltaic to a continental environment.
Fil: González Estebenet, María Sol. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Geológico del Sur; Argentina. Universidad Nacional del Sur; Argentina
Fil: Guerstein, Gladys Raquel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Geológico del Sur; Argentina. Universidad Nacional del Sur; Argentina
Fil: Rodriguez Raising, Martin Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Geológico del Sur; Argentina - Materia
-
Dinoflagellate Cysts
Middle Eocene
Southern Ocean
Bioestratigraphy
Paleoenvironment - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/6610
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Middle Eocene Dinoflagellate cysts from Santa Cruz Providence, Argentina: Biostratigraphy and PaleoenvironmentGonzález Estebenet, María SolGuerstein, Gladys RaquelRodriguez Raising, Martin EduardoDinoflagellate CystsMiddle EoceneSouthern OceanBioestratigraphyPaleoenvironmenthttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The upper member of the Río Turbio Formation is a well-exposed marine Eocene unit at high latitudes in Patagonia, Argentina. It holds important information helpful to reconstruct regional climate and oceanographic patterns in an area adjacent to the Drake Passage. Knowledge on the paleoenvironmental and paleoceanographic evolution of the southwestern Atlantic Ocean during the Paleogene is hindered by the lack of precise tools to date and correlate the sedimentary units. In this paperwe present the dinoflagellate cyst assemblages fromthe upper member of the Río Turbio Formation and compare the stratigraphic distribution of their species with the ranges proposed in the Paleogene Southern Pacific Ocean dinoflagellate cyst zonation. The abundance of Enneadocysta dictyostila, the first occurrence of Impagidinium parvireticulatum and the presence of Vozzhennikovia apertura all allow us to propose a mid-Lutetian to mid-Priabonian age (44.6 to 34 Ma) for the upper member of the Río Turbio Formation. The study section is characterized by amiddle Eocene endemic-Antarctic dinocyst assemblage. According to the dinocyst assemblages the analyzed section can be divided into four zones. Zone I is dominated by E. dictyostila, which points to a distal setting in an inner shelf environment. Zone II exhibits a high abundance of V. apertura, thus suggesting high trophic levels and coolwaters in a shallow-marine, coastal environment. Zone III is dominated by I. parvireticulatum and a lower abundance of E. dictyostila, both species indicating a possible deepening of the depositional area with increasing influence of oceanic waters. Finally, Zone IV is dominated by V. apertura, indicating shallow marine waters. Our data suggest that V. apertura could have been produced by a stress-tolerant dinoflagellate species. Toward the top of the section, the samples are dominated exclusively by sporomorphs and zygospores of fresh-water green algae, which indicate a transition from a tide-dominated deltaic to a continental environment.Fil: González Estebenet, María Sol. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Geológico del Sur; Argentina. Universidad Nacional del Sur; ArgentinaFil: Guerstein, Gladys Raquel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Geológico del Sur; Argentina. Universidad Nacional del Sur; ArgentinaFil: Rodriguez Raising, Martin Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Geológico del Sur; ArgentinaElsevier2014-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/6610González Estebenet, María Sol; Guerstein, Gladys Raquel; Rodriguez Raising, Martin Eduardo; Middle Eocene Dinoflagellate cysts from Santa Cruz Providence, Argentina: Biostratigraphy and Paleoenvironment; Elsevier; Review of Palaeobotany and Palynology; 211; 9-2014; 55-650034-6667enginfo:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/altIdentifier/doi/10.1016/j.revpalbo.2014.09.002info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0034666714001389info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:04:18Zoai:ri.conicet.gov.ar:11336/6610instacron: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 10:04:18.626CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Middle Eocene Dinoflagellate cysts from Santa Cruz Providence, Argentina: Biostratigraphy and Paleoenvironment |
title |
Middle Eocene Dinoflagellate cysts from Santa Cruz Providence, Argentina: Biostratigraphy and Paleoenvironment |
spellingShingle |
Middle Eocene Dinoflagellate cysts from Santa Cruz Providence, Argentina: Biostratigraphy and Paleoenvironment González Estebenet, María Sol Dinoflagellate Cysts Middle Eocene Southern Ocean Bioestratigraphy Paleoenvironment |
title_short |
Middle Eocene Dinoflagellate cysts from Santa Cruz Providence, Argentina: Biostratigraphy and Paleoenvironment |
title_full |
Middle Eocene Dinoflagellate cysts from Santa Cruz Providence, Argentina: Biostratigraphy and Paleoenvironment |
title_fullStr |
Middle Eocene Dinoflagellate cysts from Santa Cruz Providence, Argentina: Biostratigraphy and Paleoenvironment |
title_full_unstemmed |
Middle Eocene Dinoflagellate cysts from Santa Cruz Providence, Argentina: Biostratigraphy and Paleoenvironment |
title_sort |
Middle Eocene Dinoflagellate cysts from Santa Cruz Providence, Argentina: Biostratigraphy and Paleoenvironment |
dc.creator.none.fl_str_mv |
González Estebenet, María Sol Guerstein, Gladys Raquel Rodriguez Raising, Martin Eduardo |
author |
González Estebenet, María Sol |
author_facet |
González Estebenet, María Sol Guerstein, Gladys Raquel Rodriguez Raising, Martin Eduardo |
author_role |
author |
author2 |
Guerstein, Gladys Raquel Rodriguez Raising, Martin Eduardo |
author2_role |
author author |
dc.subject.none.fl_str_mv |
Dinoflagellate Cysts Middle Eocene Southern Ocean Bioestratigraphy Paleoenvironment |
topic |
Dinoflagellate Cysts Middle Eocene Southern Ocean Bioestratigraphy Paleoenvironment |
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 upper member of the Río Turbio Formation is a well-exposed marine Eocene unit at high latitudes in Patagonia, Argentina. It holds important information helpful to reconstruct regional climate and oceanographic patterns in an area adjacent to the Drake Passage. Knowledge on the paleoenvironmental and paleoceanographic evolution of the southwestern Atlantic Ocean during the Paleogene is hindered by the lack of precise tools to date and correlate the sedimentary units. In this paperwe present the dinoflagellate cyst assemblages fromthe upper member of the Río Turbio Formation and compare the stratigraphic distribution of their species with the ranges proposed in the Paleogene Southern Pacific Ocean dinoflagellate cyst zonation. The abundance of Enneadocysta dictyostila, the first occurrence of Impagidinium parvireticulatum and the presence of Vozzhennikovia apertura all allow us to propose a mid-Lutetian to mid-Priabonian age (44.6 to 34 Ma) for the upper member of the Río Turbio Formation. The study section is characterized by amiddle Eocene endemic-Antarctic dinocyst assemblage. According to the dinocyst assemblages the analyzed section can be divided into four zones. Zone I is dominated by E. dictyostila, which points to a distal setting in an inner shelf environment. Zone II exhibits a high abundance of V. apertura, thus suggesting high trophic levels and coolwaters in a shallow-marine, coastal environment. Zone III is dominated by I. parvireticulatum and a lower abundance of E. dictyostila, both species indicating a possible deepening of the depositional area with increasing influence of oceanic waters. Finally, Zone IV is dominated by V. apertura, indicating shallow marine waters. Our data suggest that V. apertura could have been produced by a stress-tolerant dinoflagellate species. Toward the top of the section, the samples are dominated exclusively by sporomorphs and zygospores of fresh-water green algae, which indicate a transition from a tide-dominated deltaic to a continental environment. Fil: González Estebenet, María Sol. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Geológico del Sur; Argentina. Universidad Nacional del Sur; Argentina Fil: Guerstein, Gladys Raquel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Geológico del Sur; Argentina. Universidad Nacional del Sur; Argentina Fil: Rodriguez Raising, Martin Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Geológico del Sur; Argentina |
description |
The upper member of the Río Turbio Formation is a well-exposed marine Eocene unit at high latitudes in Patagonia, Argentina. It holds important information helpful to reconstruct regional climate and oceanographic patterns in an area adjacent to the Drake Passage. Knowledge on the paleoenvironmental and paleoceanographic evolution of the southwestern Atlantic Ocean during the Paleogene is hindered by the lack of precise tools to date and correlate the sedimentary units. In this paperwe present the dinoflagellate cyst assemblages fromthe upper member of the Río Turbio Formation and compare the stratigraphic distribution of their species with the ranges proposed in the Paleogene Southern Pacific Ocean dinoflagellate cyst zonation. The abundance of Enneadocysta dictyostila, the first occurrence of Impagidinium parvireticulatum and the presence of Vozzhennikovia apertura all allow us to propose a mid-Lutetian to mid-Priabonian age (44.6 to 34 Ma) for the upper member of the Río Turbio Formation. The study section is characterized by amiddle Eocene endemic-Antarctic dinocyst assemblage. According to the dinocyst assemblages the analyzed section can be divided into four zones. Zone I is dominated by E. dictyostila, which points to a distal setting in an inner shelf environment. Zone II exhibits a high abundance of V. apertura, thus suggesting high trophic levels and coolwaters in a shallow-marine, coastal environment. Zone III is dominated by I. parvireticulatum and a lower abundance of E. dictyostila, both species indicating a possible deepening of the depositional area with increasing influence of oceanic waters. Finally, Zone IV is dominated by V. apertura, indicating shallow marine waters. Our data suggest that V. apertura could have been produced by a stress-tolerant dinoflagellate species. Toward the top of the section, the samples are dominated exclusively by sporomorphs and zygospores of fresh-water green algae, which indicate a transition from a tide-dominated deltaic to a continental environment. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-09 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/6610 González Estebenet, María Sol; Guerstein, Gladys Raquel; Rodriguez Raising, Martin Eduardo; Middle Eocene Dinoflagellate cysts from Santa Cruz Providence, Argentina: Biostratigraphy and Paleoenvironment; Elsevier; Review of Palaeobotany and Palynology; 211; 9-2014; 55-65 0034-6667 |
url |
http://hdl.handle.net/11336/6610 |
identifier_str_mv |
González Estebenet, María Sol; Guerstein, Gladys Raquel; Rodriguez Raising, Martin Eduardo; Middle Eocene Dinoflagellate cysts from Santa Cruz Providence, Argentina: Biostratigraphy and Paleoenvironment; Elsevier; Review of Palaeobotany and Palynology; 211; 9-2014; 55-65 0034-6667 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/ info:eu-repo/semantics/altIdentifier/doi/10.1016/j.revpalbo.2014.09.002 info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0034666714001389 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
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application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
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Elsevier |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
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dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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