Biostratigraphy based neogene dinoflagellate cysts in northeast of patagonia, Argentina

This paper presents the biostratigraphic results based on dinoflagellate cysts from two Neogene lithostratigraphic units cropping out in northeastern Patagonia. The Barranca Final Formation, located in the southwestern Colorado Basin, is exposed along the northern coast of San Matías Gulf, Río Negro...

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Detalles Bibliográficos
Autores principales:	Cuitiño, José Ignacio, Palazzesi, Luis, Scasso, Roberto Adrian, Barreda, Viviana Dora
Publicado:	2016
Materias:	Argentina Dinoflagellate cysts Miocene Northern patagonia
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15197530_v19_n2_p303_Fuentes http://hdl.handle.net/20.500.12110/paper_15197530_v19_n2_p303_Fuentes
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_15197530_v19_n2_p303_Fuentes
record_format	dspace
spelling	paper:paper_15197530_v19_n2_p303_Fuentes2023-06-08T16:18:49Z Biostratigraphy based neogene dinoflagellate cysts in northeast of patagonia, Argentina Cuitiño, José Ignacio Palazzesi, Luis Scasso, Roberto Adrian Barreda, Viviana Dora Argentina Dinoflagellate cysts Miocene Northern patagonia This paper presents the biostratigraphic results based on dinoflagellate cysts from two Neogene lithostratigraphic units cropping out in northeastern Patagonia. The Barranca Final Formation, located in the southwestern Colorado Basin, is exposed along the northern coast of San Matías Gulf, Río Negro Province, and the Puerto Madryn Formation in the Península Valdés, Chubut Province. The low-to-moderate diverse dinoflagellate cyst assemblages present are dominated by neritic taxa with subordinate oceanic indicators. Towards the top of both sections, the relative frequencies of the dinoflagellate cyts decrease, whereas acritarchs and continental palynomorphs proportions increase, indicating a shallowing upwards trend. The stratigraphic range of Labyrinthodinium truncatum truncatum in the lower part of the Barranca Final Formation indicate age between the late Burdigalian (ca. 16.5 Ma) and the late Tortonian (ca. 7.5 Ma) time interval. Labyrinthodinium truncatum truncatum and Habibacysta tectata constrain the age of the Puerto Madryn Formation to the Serravalian to Tortonian interval (late middle miocene to early late Miocene). Theses ages are consistent with the 87Sr/86Sr isotopic analysis of the oyster valves at 9.61 and 8.3 and with the 87Sr/86Sr ratios on calcitic shells at about 10 Ma, respectively. © 2016 by the Sociedade Brasileira de Paleontologia. Fil:Cuitiño, J.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Palazzesi, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Scasso, R.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Barreda, V.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15197530_v19_n2_p303_Fuentes http://hdl.handle.net/20.500.12110/paper_15197530_v19_n2_p303_Fuentes
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Argentina Dinoflagellate cysts Miocene Northern patagonia
spellingShingle	Argentina Dinoflagellate cysts Miocene Northern patagonia Cuitiño, José Ignacio Palazzesi, Luis Scasso, Roberto Adrian Barreda, Viviana Dora Biostratigraphy based neogene dinoflagellate cysts in northeast of patagonia, Argentina
topic_facet	Argentina Dinoflagellate cysts Miocene Northern patagonia
description	This paper presents the biostratigraphic results based on dinoflagellate cysts from two Neogene lithostratigraphic units cropping out in northeastern Patagonia. The Barranca Final Formation, located in the southwestern Colorado Basin, is exposed along the northern coast of San Matías Gulf, Río Negro Province, and the Puerto Madryn Formation in the Península Valdés, Chubut Province. The low-to-moderate diverse dinoflagellate cyst assemblages present are dominated by neritic taxa with subordinate oceanic indicators. Towards the top of both sections, the relative frequencies of the dinoflagellate cyts decrease, whereas acritarchs and continental palynomorphs proportions increase, indicating a shallowing upwards trend. The stratigraphic range of Labyrinthodinium truncatum truncatum in the lower part of the Barranca Final Formation indicate age between the late Burdigalian (ca. 16.5 Ma) and the late Tortonian (ca. 7.5 Ma) time interval. Labyrinthodinium truncatum truncatum and Habibacysta tectata constrain the age of the Puerto Madryn Formation to the Serravalian to Tortonian interval (late middle miocene to early late Miocene). Theses ages are consistent with the 87Sr/86Sr isotopic analysis of the oyster valves at 9.61 and 8.3 and with the 87Sr/86Sr ratios on calcitic shells at about 10 Ma, respectively. © 2016 by the Sociedade Brasileira de Paleontologia.
author	Cuitiño, José Ignacio Palazzesi, Luis Scasso, Roberto Adrian Barreda, Viviana Dora
author_facet	Cuitiño, José Ignacio Palazzesi, Luis Scasso, Roberto Adrian Barreda, Viviana Dora
author_sort	Cuitiño, José Ignacio
title	Biostratigraphy based neogene dinoflagellate cysts in northeast of patagonia, Argentina
title_short	Biostratigraphy based neogene dinoflagellate cysts in northeast of patagonia, Argentina
title_full	Biostratigraphy based neogene dinoflagellate cysts in northeast of patagonia, Argentina
title_fullStr	Biostratigraphy based neogene dinoflagellate cysts in northeast of patagonia, Argentina
title_full_unstemmed	Biostratigraphy based neogene dinoflagellate cysts in northeast of patagonia, Argentina
title_sort	biostratigraphy based neogene dinoflagellate cysts in northeast of patagonia, argentina
publishDate	2016
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15197530_v19_n2_p303_Fuentes http://hdl.handle.net/20.500.12110/paper_15197530_v19_n2_p303_Fuentes
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_version_	1768543150398242816

Biostratigraphy based neogene dinoflagellate cysts in northeast of patagonia, Argentina

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