Age and palaeoenvironment of the del Buey Formation, Famatina Range, La Rioja, Argentina: Sedimentological and palynological evidences

Sedimentary facies and palaeoenvironments are described and interpreted from the del Buey Formation, Famatina Range, La Rioja Province. Miospores and algae are reported for the first time in this unit. The del Buey Formation is mainly composed by pinkish to reddish shales, some conglomerates, and co...

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Detalles Bibliográficos
Autores principales:	Barreda, V.D., Ottone, E.G., Dávila, F.M., Astini, R.A.
Formato:	JOUR
Materias:	Argentina Famatina range Miocene Palynology Sedimentology age alga miospore paleoenvironment palynology sedimentology La Rioja [Argentina] South America Acer pensylvanicum algae Amaranthaceae Asteraceae Botryococcus Bryophyta Chlorococcales Chlorophyta Convolvulaceae Ephedraceae Magnoliophyta Malvaceae Pediastrum Podocarpaceae Pteridophyta Symplocaceae
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00027014_v43_n1_p215_Barreda
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00027014_v43_n1_p215_Barreda
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spelling	todo:paper_00027014_v43_n1_p215_Barreda2023-10-03T13:52:56Z Age and palaeoenvironment of the del Buey Formation, Famatina Range, La Rioja, Argentina: Sedimentological and palynological evidences Barreda, V.D. Ottone, E.G. Dávila, F.M. Astini, R.A. Argentina Famatina range Miocene Palynology Sedimentology age alga Miocene miospore paleoenvironment palynology sedimentology Argentina La Rioja [Argentina] South America Acer pensylvanicum algae Amaranthaceae Asteraceae Botryococcus Bryophyta Chlorococcales Chlorophyta Convolvulaceae Ephedraceae Magnoliophyta Malvaceae Pediastrum Podocarpaceae Pteridophyta Symplocaceae Sedimentary facies and palaeoenvironments are described and interpreted from the del Buey Formation, Famatina Range, La Rioja Province. Miospores and algae are reported for the first time in this unit. The del Buey Formation is mainly composed by pinkish to reddish shales, some conglomerates, and conspicuous levels of mudstones, interpreted as braidplain and lacustrine deposits. The palynological assemblage, recovered from the lacustrine facies, is scarce and low-diversified. It is composed by probably allochtonous Podocarpaceae, together with Malvaceae and mostly halophytic-xerophytic herbs and shrubs of Chenopodiaceae, Ephedraceae, Convolvulaceae and Asteraceae, as well as tropical taxa such as Magnaperiporites (Convolvulaceae?) and Senipites (Symplocaceae). The assemblage also contains Pteridophyta, Bryophyta and Chlorococcales (Botryococcus and Pediastrum). Species of Malvaceae and Sparganiaceae/Thyphaceae would represent the vegetation of a freshwater lake, a habitat adequate to the development of planktonic green algae, whereas the remaining taxa could have developed in lacustrine marginal environments. The record of xerophytic and tropical taxa coupled with the development of calcretes and intrasedimentary gypsum suggest semiarid and warm to warm-temperate climate conditions. Recent isotopic data indicate a Middle Miocene age for the del Buey Formation, palynological evidence supports this temporal assignment. © Asociación Paleontológica Argentina. Fil:Barreda, V.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ottone, E.G. 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_n1_p215_Barreda
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 Famatina range Miocene Palynology Sedimentology age alga Miocene miospore paleoenvironment palynology sedimentology Argentina La Rioja [Argentina] South America Acer pensylvanicum algae Amaranthaceae Asteraceae Botryococcus Bryophyta Chlorococcales Chlorophyta Convolvulaceae Ephedraceae Magnoliophyta Malvaceae Pediastrum Podocarpaceae Pteridophyta Symplocaceae
spellingShingle	Argentina Famatina range Miocene Palynology Sedimentology age alga Miocene miospore paleoenvironment palynology sedimentology Argentina La Rioja [Argentina] South America Acer pensylvanicum algae Amaranthaceae Asteraceae Botryococcus Bryophyta Chlorococcales Chlorophyta Convolvulaceae Ephedraceae Magnoliophyta Malvaceae Pediastrum Podocarpaceae Pteridophyta Symplocaceae Barreda, V.D. Ottone, E.G. Dávila, F.M. Astini, R.A. Age and palaeoenvironment of the del Buey Formation, Famatina Range, La Rioja, Argentina: Sedimentological and palynological evidences
topic_facet	Argentina Famatina range Miocene Palynology Sedimentology age alga Miocene miospore paleoenvironment palynology sedimentology Argentina La Rioja [Argentina] South America Acer pensylvanicum algae Amaranthaceae Asteraceae Botryococcus Bryophyta Chlorococcales Chlorophyta Convolvulaceae Ephedraceae Magnoliophyta Malvaceae Pediastrum Podocarpaceae Pteridophyta Symplocaceae
description	Sedimentary facies and palaeoenvironments are described and interpreted from the del Buey Formation, Famatina Range, La Rioja Province. Miospores and algae are reported for the first time in this unit. The del Buey Formation is mainly composed by pinkish to reddish shales, some conglomerates, and conspicuous levels of mudstones, interpreted as braidplain and lacustrine deposits. The palynological assemblage, recovered from the lacustrine facies, is scarce and low-diversified. It is composed by probably allochtonous Podocarpaceae, together with Malvaceae and mostly halophytic-xerophytic herbs and shrubs of Chenopodiaceae, Ephedraceae, Convolvulaceae and Asteraceae, as well as tropical taxa such as Magnaperiporites (Convolvulaceae?) and Senipites (Symplocaceae). The assemblage also contains Pteridophyta, Bryophyta and Chlorococcales (Botryococcus and Pediastrum). Species of Malvaceae and Sparganiaceae/Thyphaceae would represent the vegetation of a freshwater lake, a habitat adequate to the development of planktonic green algae, whereas the remaining taxa could have developed in lacustrine marginal environments. The record of xerophytic and tropical taxa coupled with the development of calcretes and intrasedimentary gypsum suggest semiarid and warm to warm-temperate climate conditions. Recent isotopic data indicate a Middle Miocene age for the del Buey Formation, palynological evidence supports this temporal assignment. © Asociación Paleontológica Argentina.
format	JOUR
author	Barreda, V.D. Ottone, E.G. Dávila, F.M. Astini, R.A.
author_facet	Barreda, V.D. Ottone, E.G. Dávila, F.M. Astini, R.A.
author_sort	Barreda, V.D.
title	Age and palaeoenvironment of the del Buey Formation, Famatina Range, La Rioja, Argentina: Sedimentological and palynological evidences
title_short	Age and palaeoenvironment of the del Buey Formation, Famatina Range, La Rioja, Argentina: Sedimentological and palynological evidences
title_full	Age and palaeoenvironment of the del Buey Formation, Famatina Range, La Rioja, Argentina: Sedimentological and palynological evidences
title_fullStr	Age and palaeoenvironment of the del Buey Formation, Famatina Range, La Rioja, Argentina: Sedimentological and palynological evidences
title_full_unstemmed	Age and palaeoenvironment of the del Buey Formation, Famatina Range, La Rioja, Argentina: Sedimentological and palynological evidences
title_sort	age and palaeoenvironment of the del buey formation, famatina range, la rioja, argentina: sedimentological and palynological evidences
url	http://hdl.handle.net/20.500.12110/paper_00027014_v43_n1_p215_Barreda
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Age and palaeoenvironment of the del Buey Formation, Famatina Range, La Rioja, Argentina: Sedimentological and palynological evidences

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