Estratigrafia y estructura del devónico-carbonífero en el sector septentrional de la Sierra de la Punilla, precordillera de La Rioja y San Juan

The stratigraphy and structure of the Devonian and Carboniferous units of northern Punilla rangeare analysed. The Punilla Formation mid-upper Devonian to lower Carboniferous in age, is the oldest unit recognized. It is composed by two sequences: the lower one is mainly sandstones with some conglomer...

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Autores principales:	Caminos, Roberto Luis, Fauque, Luis, Cingolani, Carlos Alberto, Varela, Ricardo, Morel, Eduardo Manuel
Formato:	Objeto de conferencia
Lenguaje:	Español
Publicado:	1993
Materias:	Geología Estratigrafía Punilla
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/157032
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-157032
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spelling	I19-R120-10915-1570322023-08-29T20:40:51Z http://sedici.unlp.edu.ar/handle/10915/157032 Estratigrafia y estructura del devónico-carbonífero en el sector septentrional de la Sierra de la Punilla, precordillera de La Rioja y San Juan Caminos, Roberto Luis Fauque, Luis Cingolani, Carlos Alberto Varela, Ricardo Morel, Eduardo Manuel 1993 1993 2023-08-29T18:17:22Z es Geología Estratigrafía Punilla The stratigraphy and structure of the Devonian and Carboniferous units of northern Punilla rangeare analysed. The Punilla Formation mid-upper Devonian to lower Carboniferous in age, is the oldest unit recognized. It is composed by two sequences: the lower one is mainly sandstones with some conglomerate layers interbeded, the sandstones bear Malanzania antigua and Hyenia sp.. The upper sequence is characterized by a conglomerate-sandstone-shale association, in which several andesitic dykes were emplaced. Lower Carboniferous fossil plants Frenguellia eximia, Lepidodendropsis hirmeri, Diplothmema bodenbenderi, Eusphenopteris devonica and "Rodhea" (Archaeosigillaria- Lepidodendropsis Biozone) are present in this sequence. The Upper Carboniferous Quebrada Larga and Acerillos Formations are also described here as part of the inner Punilla range. Light gray and yellowish feldspatic sandstones, associated to swarm of andesitic dykes, characterize the first unit. These upper Carboniferous sediments are bearing Malanzania nana and Bothrychiopsis weissiana (NBG Biozone). An angular unconformity separate Quebrada Larga from Punilla Formation. The Acerillos Formation is a volcano- sedimentary complex, similar to the upper Carboniferous Punta del Agua Formation. The Devonian and Carboniferous units of La Punilla range are part of a folded arcuate belt, convex towards the west. The arc-shaped-belt is interpreted as a gondwanic structure originated by the deformation produced by a wedge of Umango basement rocks, which was controlled by two regional megafractures. The Punilla Formation folding is related to the intra-Carboniferous Rio Blanco tectonic phase. Centro de Investigaciones Geológicas Objeto de conferencia Objeto de conferencia http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 31-41
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Español
topic	Geología Estratigrafía Punilla
spellingShingle	Geología Estratigrafía Punilla Caminos, Roberto Luis Fauque, Luis Cingolani, Carlos Alberto Varela, Ricardo Morel, Eduardo Manuel Estratigrafia y estructura del devónico-carbonífero en el sector septentrional de la Sierra de la Punilla, precordillera de La Rioja y San Juan
topic_facet	Geología Estratigrafía Punilla
description	The stratigraphy and structure of the Devonian and Carboniferous units of northern Punilla rangeare analysed. The Punilla Formation mid-upper Devonian to lower Carboniferous in age, is the oldest unit recognized. It is composed by two sequences: the lower one is mainly sandstones with some conglomerate layers interbeded, the sandstones bear Malanzania antigua and Hyenia sp.. The upper sequence is characterized by a conglomerate-sandstone-shale association, in which several andesitic dykes were emplaced. Lower Carboniferous fossil plants Frenguellia eximia, Lepidodendropsis hirmeri, Diplothmema bodenbenderi, Eusphenopteris devonica and "Rodhea" (Archaeosigillaria- Lepidodendropsis Biozone) are present in this sequence. The Upper Carboniferous Quebrada Larga and Acerillos Formations are also described here as part of the inner Punilla range. Light gray and yellowish feldspatic sandstones, associated to swarm of andesitic dykes, characterize the first unit. These upper Carboniferous sediments are bearing Malanzania nana and Bothrychiopsis weissiana (NBG Biozone). An angular unconformity separate Quebrada Larga from Punilla Formation. The Acerillos Formation is a volcano- sedimentary complex, similar to the upper Carboniferous Punta del Agua Formation. The Devonian and Carboniferous units of La Punilla range are part of a folded arcuate belt, convex towards the west. The arc-shaped-belt is interpreted as a gondwanic structure originated by the deformation produced by a wedge of Umango basement rocks, which was controlled by two regional megafractures. The Punilla Formation folding is related to the intra-Carboniferous Rio Blanco tectonic phase.
format	Objeto de conferencia Objeto de conferencia
author	Caminos, Roberto Luis Fauque, Luis Cingolani, Carlos Alberto Varela, Ricardo Morel, Eduardo Manuel
author_facet	Caminos, Roberto Luis Fauque, Luis Cingolani, Carlos Alberto Varela, Ricardo Morel, Eduardo Manuel
author_sort	Caminos, Roberto Luis
title	Estratigrafia y estructura del devónico-carbonífero en el sector septentrional de la Sierra de la Punilla, precordillera de La Rioja y San Juan
title_short	Estratigrafia y estructura del devónico-carbonífero en el sector septentrional de la Sierra de la Punilla, precordillera de La Rioja y San Juan
title_full	Estratigrafia y estructura del devónico-carbonífero en el sector septentrional de la Sierra de la Punilla, precordillera de La Rioja y San Juan
title_fullStr	Estratigrafia y estructura del devónico-carbonífero en el sector septentrional de la Sierra de la Punilla, precordillera de La Rioja y San Juan
title_full_unstemmed	Estratigrafia y estructura del devónico-carbonífero en el sector septentrional de la Sierra de la Punilla, precordillera de La Rioja y San Juan
title_sort	estratigrafia y estructura del devónico-carbonífero en el sector septentrional de la sierra de la punilla, precordillera de la rioja y san juan
publishDate	1993
url	http://sedici.unlp.edu.ar/handle/10915/157032
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Estratigrafia y estructura del devónico-carbonífero en el sector septentrional de la Sierra de la Punilla, precordillera de La Rioja y San Juan

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