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

Autores
Caminos, Roberto Luis; Fauque, Luis; Cingolani, Carlos Alberto; Varela, Ricardo; Morel, Eduardo Manuel
Año de publicación
1993
Idioma
español castellano
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
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
Materia
Geología
Estratigrafía
Punilla
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/157032
Acceder
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network_name_str SEDICI (UNLP)
spelling Estratigrafia y estructura del devónico-carbonífero en el sector septentrional de la Sierra de la Punilla, precordillera de La Rioja y San JuanCaminos, Roberto LuisFauque, LuisCingolani, Carlos AlbertoVarela, RicardoMorel, Eduardo ManuelGeologíaEstratigrafíaPunillaThe 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 Geológicas1993info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionObjeto de conferenciahttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdf31-41http://sedici.unlp.edu.ar/handle/10915/157032spainfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-15T11:32:42Zoai:sedici.unlp.edu.ar:10915/157032Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:32:42.296SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Estratigrafia y estructura del devónico-carbonífero en el sector septentrional de la Sierra de la Punilla, precordillera de La Rioja y San Juan
title Estratigrafia y estructura del devónico-carbonífero en el sector septentrional de la Sierra de la Punilla, precordillera de La Rioja y San Juan
spellingShingle 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
Geología
Estratigrafía
Punilla
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
dc.creator.none.fl_str_mv Caminos, Roberto Luis
Fauque, Luis
Cingolani, Carlos Alberto
Varela, Ricardo
Morel, Eduardo Manuel
author Caminos, Roberto Luis
author_facet Caminos, Roberto Luis
Fauque, Luis
Cingolani, Carlos Alberto
Varela, Ricardo
Morel, Eduardo Manuel
author_role author
author2 Fauque, Luis
Cingolani, Carlos Alberto
Varela, Ricardo
Morel, Eduardo Manuel
author2_role author
author
author
author
dc.subject.none.fl_str_mv Geología
Estratigrafía
Punilla
topic Geología
Estratigrafía
Punilla
dc.description.none.fl_txt_mv 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
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.
publishDate 1993
dc.date.none.fl_str_mv 1993
dc.type.none.fl_str_mv info:eu-repo/semantics/conferenceObject
info:eu-repo/semantics/publishedVersion
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