First radiometric age of Cretaceous deposits of the Central Precordillera

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Ciénaga del Río Huaco Formation was deposited during the Cretaceous in the Precordillera Central (La Rioja and San Juan provinces). The unit forms part of a thick red-bed sequence including rocks of different ages (from Late Paleozoic to Tertiary) and problematic identification. In the La Troya rive...

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Autores principales: Tedesco, A.M., Limarino, C.O., Ciccioli, P.L.
Formato: Artículo publishedVersion
Publicado: 2007
Materias:
Ciénaga Huaco
La Rioja
Mesozoic
Cretaceous
formation mechanism
geochronology
palynomorph
radiometric method
red bed
sediment thickness
sedimentary sequence
Argentina
La Rioja [Argentina]
Precordillera
San Juan [Argentina]
South America
Ostracoda
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v62_n3_p471_Tedesco
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v62_n3_p471_Tedesco_oai
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Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires
id I28-R145-paper_00044822_v62_n3_p471_Tedesco_oai
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spelling I28-R145-paper_00044822_v62_n3_p471_Tedesco_oai2024-08-16 Tedesco, A.M. Limarino, C.O. Ciccioli, P.L. 2007 Ciénaga del Río Huaco Formation was deposited during the Cretaceous in the Precordillera Central (La Rioja and San Juan provinces). The unit forms part of a thick red-bed sequence including rocks of different ages (from Late Paleozoic to Tertiary) and problematic identification. In the La Troya river area, the red bed sequence is composed of the Panacán (Permian), Santo Domingo (Late Triassic- Early Jurassic), Ciénaga del Río Huaco (Cretaceous) and Puesto La Flecha Formations (Oligocene- Early Nfiocene). In the past, all these formations were included in the same stratigrapbic unit and only in recent years the different formations could be separated mainly based on their fossil contain. In the case of Ciénaga del Rio Huaco Formation, the finding of microfossils (palynomorphs and ostracods) allowed to infer a Late Cretaceous age for these rocks. However, a radiometric age of 108,1 ± 4,4 Ma presented in this paper, clearly suggest that the unit was deposited at the end of the Early Cretaceous. This age is the first Cretaceous absolute age in the Precordillera Central and enhances the time constraints of of the Cretaceous Basin. Fil:Tedesco, A.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Limarino, C.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ciccioli, P.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_00044822_v62_n3_p471_Tedesco info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Rev. Asoc. Geol. Argent. 2007;62(3):471-474 Ciénaga Huaco La Rioja Mesozoic Cretaceous formation mechanism geochronology palynomorph radiometric method red bed sediment thickness sedimentary sequence Argentina La Rioja [Argentina] Precordillera San Juan [Argentina] South America Ostracoda First radiometric age of Cretaceous deposits of the Central Precordillera info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v62_n3_p471_Tedesco_oai
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-145
collection Repositorio Digital de la Universidad de Buenos Aires (UBA)
topic Ciénaga Huaco
La Rioja
Mesozoic
Cretaceous
formation mechanism
geochronology
palynomorph
radiometric method
red bed
sediment thickness
sedimentary sequence
Argentina
La Rioja [Argentina]
Precordillera
San Juan [Argentina]
South America
Ostracoda
spellingShingle Ciénaga Huaco
La Rioja
Mesozoic
Cretaceous
formation mechanism
geochronology
palynomorph
radiometric method
red bed
sediment thickness
sedimentary sequence
Argentina
La Rioja [Argentina]
Precordillera
San Juan [Argentina]
South America
Ostracoda
Tedesco, A.M.
Limarino, C.O.
Ciccioli, P.L.
First radiometric age of Cretaceous deposits of the Central Precordillera
topic_facet Ciénaga Huaco
La Rioja
Mesozoic
Cretaceous
formation mechanism
geochronology
palynomorph
radiometric method
red bed
sediment thickness
sedimentary sequence
Argentina
La Rioja [Argentina]
Precordillera
San Juan [Argentina]
South America
Ostracoda
description Ciénaga del Río Huaco Formation was deposited during the Cretaceous in the Precordillera Central (La Rioja and San Juan provinces). The unit forms part of a thick red-bed sequence including rocks of different ages (from Late Paleozoic to Tertiary) and problematic identification. In the La Troya river area, the red bed sequence is composed of the Panacán (Permian), Santo Domingo (Late Triassic- Early Jurassic), Ciénaga del Río Huaco (Cretaceous) and Puesto La Flecha Formations (Oligocene- Early Nfiocene). In the past, all these formations were included in the same stratigrapbic unit and only in recent years the different formations could be separated mainly based on their fossil contain. In the case of Ciénaga del Rio Huaco Formation, the finding of microfossils (palynomorphs and ostracods) allowed to infer a Late Cretaceous age for these rocks. However, a radiometric age of 108,1 ± 4,4 Ma presented in this paper, clearly suggest that the unit was deposited at the end of the Early Cretaceous. This age is the first Cretaceous absolute age in the Precordillera Central and enhances the time constraints of of the Cretaceous Basin.
format Artículo
Artículo
publishedVersion
author Tedesco, A.M.
Limarino, C.O.
Ciccioli, P.L.
author_facet Tedesco, A.M.
Limarino, C.O.
Ciccioli, P.L.
author_sort Tedesco, A.M.
title First radiometric age of Cretaceous deposits of the Central Precordillera
title_short First radiometric age of Cretaceous deposits of the Central Precordillera
title_full First radiometric age of Cretaceous deposits of the Central Precordillera
title_fullStr First radiometric age of Cretaceous deposits of the Central Precordillera
title_full_unstemmed First radiometric age of Cretaceous deposits of the Central Precordillera
title_sort first radiometric age of cretaceous deposits of the central precordillera
publishDate 2007
url http://hdl.handle.net/20.500.12110/paper_00044822_v62_n3_p471_Tedesco
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v62_n3_p471_Tedesco_oai
work_keys_str_mv AT tedescoam firstradiometricageofcretaceousdepositsofthecentralprecordillera
AT limarinoco firstradiometricageofcretaceousdepositsofthecentralprecordillera
AT cicciolipl firstradiometricageofcretaceousdepositsofthecentralprecordillera
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