Sinclinal of Rincón Blanco section northwest of La Rioja: Carboniferous-Permian boundary in northwest Argentina

The finding of palynological associations in the Río del Peñón Formation (Late Carboniferous-Early Permian) is addressed. The fossiliferous section is located in the northern Precordillera, more precisely at the Río Blanco area, situated to the west of Jagüe Town. The Río del Peñón Formation (1,270...

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Autores principales: Gutiérrez, P.R., Limarino, C.O.
Formato: JOUR
Materias:
Argentina
Biostratigraphy
Carboniferous-Permian boundary
Geochronology
La Rioja
Paleopalynology
age determination
biostratigraphy
biozonation
Carboniferous
fossil assemblage
geochronology
invertebrate
marine environment
palynology
Permian
stratotype
La Rioja [Argentina]
South America
Invertebrata
Raistrickia
Vittatina
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00027014_v43_n4_p687_Gutierrez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00027014_v43_n4_p687_Gutierrez
record_format dspace
spelling todo:paper_00027014_v43_n4_p687_Gutierrez2023-10-03T13:53:00Z Sinclinal of Rincón Blanco section northwest of La Rioja: Carboniferous-Permian boundary in northwest Argentina Gutiérrez, P.R. Limarino, C.O. Argentina Biostratigraphy Carboniferous-Permian boundary Geochronology La Rioja Paleopalynology age determination biostratigraphy biozonation Carboniferous fossil assemblage geochronology invertebrate marine environment palynology Permian stratotype Argentina La Rioja [Argentina] South America Invertebrata Raistrickia Vittatina The finding of palynological associations in the Río del Peñón Formation (Late Carboniferous-Early Permian) is addressed. The fossiliferous section is located in the northern Precordillera, more precisely at the Río Blanco area, situated to the west of Jagüe Town. The Río del Peñón Formation (1,270 m thick) is composed of three members, the lower (729 m thick) bears 21 fossilifeous levels, whereas both the middle (161 m thick) and upper members contain only 2. The lower 16 fossiliferous levels contain palynological associations referred to the Raistrickia densa-Convolutispora muriornata Biozone (DM, C Sub-biozone?). The rest of the palynological levels are here included in the Pakhapites fusus-Vittatina subsaccata Biozone (FS). Moreover, in this paper the stratigraphic relationship among the palynological associations, the megafloristic NBG Biozone and the marine invertebrates assemblages described by previous authors (Tivertonia jachalensis-Streptorhynchus inaequioenatus Biozone) are also identified. The palynological information here presented and previous radiometric ages reported not only by the underlying Punta del Agua Formation (287 and 295 Ma) but also by a riodacitic sill intercalated in the lowermost part of the Río del Peñón Formation (287,8±0,7 Ma) allow to assign the Río del Peñón Formation to the uppermost part of the Upper Carboniferous-Lower Permian. Moreover, the ages of the NBG and DM Biozones are constrained to the beginning of the Permian. Finally the Rincón Blanco section is proposed as a potential stratotype for the boundary between the DM and FS Biozones and thus for the Carboniferous-Permian boundary. © Asociación Paleontológica Argentina. Fil:Gutiérrez, P.R. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00027014_v43_n4_p687_Gutierrez
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
Biostratigraphy
Carboniferous-Permian boundary
Geochronology
La Rioja
Paleopalynology
age determination
biostratigraphy
biozonation
Carboniferous
fossil assemblage
geochronology
invertebrate
marine environment
palynology
Permian
stratotype
Argentina
La Rioja [Argentina]
South America
Invertebrata
Raistrickia
Vittatina
spellingShingle Argentina
Biostratigraphy
Carboniferous-Permian boundary
Geochronology
La Rioja
Paleopalynology
age determination
biostratigraphy
biozonation
Carboniferous
fossil assemblage
geochronology
invertebrate
marine environment
palynology
Permian
stratotype
Argentina
La Rioja [Argentina]
South America
Invertebrata
Raistrickia
Vittatina
Gutiérrez, P.R.
Limarino, C.O.
Sinclinal of Rincón Blanco section northwest of La Rioja: Carboniferous-Permian boundary in northwest Argentina
topic_facet Argentina
Biostratigraphy
Carboniferous-Permian boundary
Geochronology
La Rioja
Paleopalynology
age determination
biostratigraphy
biozonation
Carboniferous
fossil assemblage
geochronology
invertebrate
marine environment
palynology
Permian
stratotype
Argentina
La Rioja [Argentina]
South America
Invertebrata
Raistrickia
Vittatina
description The finding of palynological associations in the Río del Peñón Formation (Late Carboniferous-Early Permian) is addressed. The fossiliferous section is located in the northern Precordillera, more precisely at the Río Blanco area, situated to the west of Jagüe Town. The Río del Peñón Formation (1,270 m thick) is composed of three members, the lower (729 m thick) bears 21 fossilifeous levels, whereas both the middle (161 m thick) and upper members contain only 2. The lower 16 fossiliferous levels contain palynological associations referred to the Raistrickia densa-Convolutispora muriornata Biozone (DM, C Sub-biozone?). The rest of the palynological levels are here included in the Pakhapites fusus-Vittatina subsaccata Biozone (FS). Moreover, in this paper the stratigraphic relationship among the palynological associations, the megafloristic NBG Biozone and the marine invertebrates assemblages described by previous authors (Tivertonia jachalensis-Streptorhynchus inaequioenatus Biozone) are also identified. The palynological information here presented and previous radiometric ages reported not only by the underlying Punta del Agua Formation (287 and 295 Ma) but also by a riodacitic sill intercalated in the lowermost part of the Río del Peñón Formation (287,8±0,7 Ma) allow to assign the Río del Peñón Formation to the uppermost part of the Upper Carboniferous-Lower Permian. Moreover, the ages of the NBG and DM Biozones are constrained to the beginning of the Permian. Finally the Rincón Blanco section is proposed as a potential stratotype for the boundary between the DM and FS Biozones and thus for the Carboniferous-Permian boundary. © Asociación Paleontológica Argentina.
format JOUR
author Gutiérrez, P.R.
Limarino, C.O.
author_facet Gutiérrez, P.R.
Limarino, C.O.
author_sort Gutiérrez, P.R.
title Sinclinal of Rincón Blanco section northwest of La Rioja: Carboniferous-Permian boundary in northwest Argentina
title_short Sinclinal of Rincón Blanco section northwest of La Rioja: Carboniferous-Permian boundary in northwest Argentina
title_full Sinclinal of Rincón Blanco section northwest of La Rioja: Carboniferous-Permian boundary in northwest Argentina
title_fullStr Sinclinal of Rincón Blanco section northwest of La Rioja: Carboniferous-Permian boundary in northwest Argentina
title_full_unstemmed Sinclinal of Rincón Blanco section northwest of La Rioja: Carboniferous-Permian boundary in northwest Argentina
title_sort sinclinal of rincón blanco section northwest of la rioja: carboniferous-permian boundary in northwest argentina
url http://hdl.handle.net/20.500.12110/paper_00027014_v43_n4_p687_Gutierrez
work_keys_str_mv AT gutierrezpr sinclinalofrinconblancosectionnorthwestoflariojacarboniferouspermianboundaryinnorthwestargentina
AT limarinoco sinclinalofrinconblancosectionnorthwestoflariojacarboniferouspermianboundaryinnorthwestargentina
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