Palynology of the Malanaán formation (Upper carboniferous), La Rioja province, Argentina: New data and Paleoenvironment considerations

Palynology of the Malanzán Formation (Upper Carboniferous), La Rioja Province, Argentina: New Data and Paleoenvironmental Considerations. A new palynological association from the middle part of the Malanzán Formation (Sierra de Los Llanos) is described. The microflora is composed of thirty species o...

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Autores principales: Gutiérrez, P.R., Limarino, C.O.
Formato: JOUR
Materias:
Argentina
Correlation
La Rioja
Malanzán formation
Paganzo Basin
Paleocology
Palynology
Upper carboniferous
biostratigraphy
paleoecology
paleoenvironment
palynology
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00027014_v38_n1_p99_Gutierrez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00027014_v38_n1_p99_Gutierrez
record_format dspace
spelling todo:paper_00027014_v38_n1_p99_Gutierrez2023-10-03T13:52:46Z Palynology of the Malanaán formation (Upper carboniferous), La Rioja province, Argentina: New data and Paleoenvironment considerations Gutiérrez, P.R. Limarino, C.O. Argentina Correlation La Rioja Malanzán formation Paganzo Basin Paleocology Palynology Upper carboniferous biostratigraphy paleoecology paleoenvironment palynology Argentina Palynology of the Malanzán Formation (Upper Carboniferous), La Rioja Province, Argentina: New Data and Paleoenvironmental Considerations. A new palynological association from the middle part of the Malanzán Formation (Sierra de Los Llanos) is described. The microflora is composed of thirty species of spores and pollen grains associated to algae, prasinophyceaes and acritarchs. The most common species of spores are Retusotriletes anfractus Menéndez and Azcuy, Apiculiretusispora ralla (Menéndez and Azcuy) Menéndez and Azcuy, A. variornata (Menéndez and Azcuy) Menéndez and Azcuy, Rugospora cortaderensis (Césari and Limarino) nov. comb., Foveosporites hortonensis (Playford) Azcuy, Raistrickia rotunda Azcuy, Convolutispora muriornata Menéndez, Granulatisporites varigranifer Menéndez and Azcuy, Cristatisporites stellatus (Azcuy) nov. comb., C. menendezii (Menéndez and Azcuy) Playford, Anapiculatisporites argentinensis Azcuy, and Pustulatisporites papillosus (Knox) Potonié and Kremp. According to the known stratigraphic distribution of these species, a Late Carboniferous age (late Namurian-Westphalian) is proposed for the Malanzán Formation. In addition, the presence of Navifusa variabilis nov. sp., Leiosphaeridia, Cymatiosphaera, and Greinervillites suggests brackish conditions during at least part of the sedimentation of the Malanzán Formation. Probably, this evidence suggests a postglacial transgression (late Namurian-early Westphalian) that flooded lakes and fluvial valleys. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00027014_v38_n1_p99_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
Correlation
La Rioja
Malanzán formation
Paganzo Basin
Paleocology
Palynology
Upper carboniferous
biostratigraphy
paleoecology
paleoenvironment
palynology
Argentina
spellingShingle Argentina
Correlation
La Rioja
Malanzán formation
Paganzo Basin
Paleocology
Palynology
Upper carboniferous
biostratigraphy
paleoecology
paleoenvironment
palynology
Argentina
Gutiérrez, P.R.
Limarino, C.O.
Palynology of the Malanaán formation (Upper carboniferous), La Rioja province, Argentina: New data and Paleoenvironment considerations
topic_facet Argentina
Correlation
La Rioja
Malanzán formation
Paganzo Basin
Paleocology
Palynology
Upper carboniferous
biostratigraphy
paleoecology
paleoenvironment
palynology
Argentina
description Palynology of the Malanzán Formation (Upper Carboniferous), La Rioja Province, Argentina: New Data and Paleoenvironmental Considerations. A new palynological association from the middle part of the Malanzán Formation (Sierra de Los Llanos) is described. The microflora is composed of thirty species of spores and pollen grains associated to algae, prasinophyceaes and acritarchs. The most common species of spores are Retusotriletes anfractus Menéndez and Azcuy, Apiculiretusispora ralla (Menéndez and Azcuy) Menéndez and Azcuy, A. variornata (Menéndez and Azcuy) Menéndez and Azcuy, Rugospora cortaderensis (Césari and Limarino) nov. comb., Foveosporites hortonensis (Playford) Azcuy, Raistrickia rotunda Azcuy, Convolutispora muriornata Menéndez, Granulatisporites varigranifer Menéndez and Azcuy, Cristatisporites stellatus (Azcuy) nov. comb., C. menendezii (Menéndez and Azcuy) Playford, Anapiculatisporites argentinensis Azcuy, and Pustulatisporites papillosus (Knox) Potonié and Kremp. According to the known stratigraphic distribution of these species, a Late Carboniferous age (late Namurian-Westphalian) is proposed for the Malanzán Formation. In addition, the presence of Navifusa variabilis nov. sp., Leiosphaeridia, Cymatiosphaera, and Greinervillites suggests brackish conditions during at least part of the sedimentation of the Malanzán Formation. Probably, this evidence suggests a postglacial transgression (late Namurian-early Westphalian) that flooded lakes and fluvial valleys.
format JOUR
author Gutiérrez, P.R.
Limarino, C.O.
author_facet Gutiérrez, P.R.
Limarino, C.O.
author_sort Gutiérrez, P.R.
title Palynology of the Malanaán formation (Upper carboniferous), La Rioja province, Argentina: New data and Paleoenvironment considerations
title_short Palynology of the Malanaán formation (Upper carboniferous), La Rioja province, Argentina: New data and Paleoenvironment considerations
title_full Palynology of the Malanaán formation (Upper carboniferous), La Rioja province, Argentina: New data and Paleoenvironment considerations
title_fullStr Palynology of the Malanaán formation (Upper carboniferous), La Rioja province, Argentina: New data and Paleoenvironment considerations
title_full_unstemmed Palynology of the Malanaán formation (Upper carboniferous), La Rioja province, Argentina: New data and Paleoenvironment considerations
title_sort palynology of the malanaán formation (upper carboniferous), la rioja province, argentina: new data and paleoenvironment considerations
url http://hdl.handle.net/20.500.12110/paper_00027014_v38_n1_p99_Gutierrez
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AT limarinoco palynologyofthemalanaanformationuppercarboniferouslariojaprovinceargentinanewdataandpaleoenvironmentconsiderations
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