Hierarchy of bounding surfaces in aeolian sandstones of the Tordillo Formation (Jurassic). Neuquén Basin, Argentina

Autores
Zavala, Carlos Alberto; Maretto, Hernán; Di Meglio, Mariano
Año de publicación
2005
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Tordillo Formation is a continental clastic unit deposited in the Neuquén Basin during the Late Jurassic. This paper discusses the stratigraphy of the succession outcropping at the Quebrada del Sapo, with emphasis on the origin, dimensions and hierarchy of bounding surfaces of aeolian deposits. Field survey, supported by the measurement of three detailed stratigraphic sections and line drawings of photographic panels allow the identi- fication of four unconformity bounded units within the succession, informally named as T1, T2, T3 and T4. Units T1 and T3 are composed of conglomerates and pebbly sandstones deposited by density flows in a lacus- trine environment. Paleocurrents indicate a source area located in the northeast while the presence of angular sandstone blocks suggests resedimentation processes. T2 and T4 units are composed of fine to medium grained sandstones of aeolian origin, characterized by large scale dunes and minor dry interdunes. Both units have sharp bases, and overlie a deflation surface characterized by the presence of ventifacts. Paleocurrents suggest a pale- owind direction from the southwest. Internal bounding surfaces show a hierarchy of at least four discrete sur- faces which were numbered according to their crescent extension. Type 1 surfaces are related to the normal advance of the dune front. Type 2 are reactivation surfaces within a single dune set. Type 3 surfaces relate to set superposition. Type 4 surfaces are related to extensive deflation of the dune complex, and define at least nine elementary aeolian sequences in the T4 unit.
Fil: Zavala, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur; Argentina
Fil: Maretto, Hernán. Repsol YPF; Argentina
Fil: Di Meglio, Mariano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur; Argentina
Materia
Aeolian deposits
Tordillo Formation
Neuquén Basin
Argentina
Jurassic
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/28889
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/28889
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Hierarchy of bounding surfaces in aeolian sandstones of the Tordillo Formation (Jurassic). Neuquén Basin, ArgentinaZavala, Carlos AlbertoMaretto, HernánDi Meglio, MarianoAeolian depositsTordillo FormationNeuquén BasinArgentinaJurassichttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Tordillo Formation is a continental clastic unit deposited in the Neuquén Basin during the Late Jurassic. This paper discusses the stratigraphy of the succession outcropping at the Quebrada del Sapo, with emphasis on the origin, dimensions and hierarchy of bounding surfaces of aeolian deposits. Field survey, supported by the measurement of three detailed stratigraphic sections and line drawings of photographic panels allow the identi- fication of four unconformity bounded units within the succession, informally named as T1, T2, T3 and T4. Units T1 and T3 are composed of conglomerates and pebbly sandstones deposited by density flows in a lacus- trine environment. Paleocurrents indicate a source area located in the northeast while the presence of angular sandstone blocks suggests resedimentation processes. T2 and T4 units are composed of fine to medium grained sandstones of aeolian origin, characterized by large scale dunes and minor dry interdunes. Both units have sharp bases, and overlie a deflation surface characterized by the presence of ventifacts. Paleocurrents suggest a pale- owind direction from the southwest. Internal bounding surfaces show a hierarchy of at least four discrete sur- faces which were numbered according to their crescent extension. Type 1 surfaces are related to the normal advance of the dune front. Type 2 are reactivation surfaces within a single dune set. Type 3 surfaces relate to set superposition. Type 4 surfaces are related to extensive deflation of the dune complex, and define at least nine elementary aeolian sequences in the T4 unit.Fil: Zavala, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur; ArgentinaFil: Maretto, Hernán. Repsol YPF; ArgentinaFil: Di Meglio, Mariano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur; ArgentinaUniversitat de Barcelona. Facultat de Geologia2005-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/28889Zavala, Carlos Alberto; Maretto, Hernán; Di Meglio, Mariano; Hierarchy of bounding surfaces in aeolian sandstones of the Tordillo Formation (Jurassic). Neuquén Basin, Argentina; Universitat de Barcelona. Facultat de Geologia; Geológica Acta; 3; 2; 12-2005; 133-1451695-6133CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://revistes.ub.edu/index.php/GEOACTA/article/view/105.000001402info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:39:23Zoai:ri.conicet.gov.ar:11336/28889instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:39:23.476CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Hierarchy of bounding surfaces in aeolian sandstones of the Tordillo Formation (Jurassic). Neuquén Basin, Argentina
title Hierarchy of bounding surfaces in aeolian sandstones of the Tordillo Formation (Jurassic). Neuquén Basin, Argentina
spellingShingle Hierarchy of bounding surfaces in aeolian sandstones of the Tordillo Formation (Jurassic). Neuquén Basin, Argentina
Zavala, Carlos Alberto
Aeolian deposits
Tordillo Formation
Neuquén Basin
Argentina
Jurassic
title_short Hierarchy of bounding surfaces in aeolian sandstones of the Tordillo Formation (Jurassic). Neuquén Basin, Argentina
title_full Hierarchy of bounding surfaces in aeolian sandstones of the Tordillo Formation (Jurassic). Neuquén Basin, Argentina
title_fullStr Hierarchy of bounding surfaces in aeolian sandstones of the Tordillo Formation (Jurassic). Neuquén Basin, Argentina
title_full_unstemmed Hierarchy of bounding surfaces in aeolian sandstones of the Tordillo Formation (Jurassic). Neuquén Basin, Argentina
title_sort Hierarchy of bounding surfaces in aeolian sandstones of the Tordillo Formation (Jurassic). Neuquén Basin, Argentina
dc.creator.none.fl_str_mv Zavala, Carlos Alberto
Maretto, Hernán
Di Meglio, Mariano
author Zavala, Carlos Alberto
author_facet Zavala, Carlos Alberto
Maretto, Hernán
Di Meglio, Mariano
author_role author
author2 Maretto, Hernán
Di Meglio, Mariano
author2_role author
author
dc.subject.none.fl_str_mv Aeolian deposits
Tordillo Formation
Neuquén Basin
Argentina
Jurassic
topic Aeolian deposits
Tordillo Formation
Neuquén Basin
Argentina
Jurassic
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The Tordillo Formation is a continental clastic unit deposited in the Neuquén Basin during the Late Jurassic. This paper discusses the stratigraphy of the succession outcropping at the Quebrada del Sapo, with emphasis on the origin, dimensions and hierarchy of bounding surfaces of aeolian deposits. Field survey, supported by the measurement of three detailed stratigraphic sections and line drawings of photographic panels allow the identi- fication of four unconformity bounded units within the succession, informally named as T1, T2, T3 and T4. Units T1 and T3 are composed of conglomerates and pebbly sandstones deposited by density flows in a lacus- trine environment. Paleocurrents indicate a source area located in the northeast while the presence of angular sandstone blocks suggests resedimentation processes. T2 and T4 units are composed of fine to medium grained sandstones of aeolian origin, characterized by large scale dunes and minor dry interdunes. Both units have sharp bases, and overlie a deflation surface characterized by the presence of ventifacts. Paleocurrents suggest a pale- owind direction from the southwest. Internal bounding surfaces show a hierarchy of at least four discrete sur- faces which were numbered according to their crescent extension. Type 1 surfaces are related to the normal advance of the dune front. Type 2 are reactivation surfaces within a single dune set. Type 3 surfaces relate to set superposition. Type 4 surfaces are related to extensive deflation of the dune complex, and define at least nine elementary aeolian sequences in the T4 unit.
Fil: Zavala, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur; Argentina
Fil: Maretto, Hernán. Repsol YPF; Argentina
Fil: Di Meglio, Mariano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur; Argentina
description The Tordillo Formation is a continental clastic unit deposited in the Neuquén Basin during the Late Jurassic. This paper discusses the stratigraphy of the succession outcropping at the Quebrada del Sapo, with emphasis on the origin, dimensions and hierarchy of bounding surfaces of aeolian deposits. Field survey, supported by the measurement of three detailed stratigraphic sections and line drawings of photographic panels allow the identi- fication of four unconformity bounded units within the succession, informally named as T1, T2, T3 and T4. Units T1 and T3 are composed of conglomerates and pebbly sandstones deposited by density flows in a lacus- trine environment. Paleocurrents indicate a source area located in the northeast while the presence of angular sandstone blocks suggests resedimentation processes. T2 and T4 units are composed of fine to medium grained sandstones of aeolian origin, characterized by large scale dunes and minor dry interdunes. Both units have sharp bases, and overlie a deflation surface characterized by the presence of ventifacts. Paleocurrents suggest a pale- owind direction from the southwest. Internal bounding surfaces show a hierarchy of at least four discrete sur- faces which were numbered according to their crescent extension. Type 1 surfaces are related to the normal advance of the dune front. Type 2 are reactivation surfaces within a single dune set. Type 3 surfaces relate to set superposition. Type 4 surfaces are related to extensive deflation of the dune complex, and define at least nine elementary aeolian sequences in the T4 unit.
publishDate 2005
dc.date.none.fl_str_mv 2005-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/28889
Zavala, Carlos Alberto; Maretto, Hernán; Di Meglio, Mariano; Hierarchy of bounding surfaces in aeolian sandstones of the Tordillo Formation (Jurassic). Neuquén Basin, Argentina; Universitat de Barcelona. Facultat de Geologia; Geológica Acta; 3; 2; 12-2005; 133-145
1695-6133
CONICET Digital
CONICET
url http://hdl.handle.net/11336/28889
identifier_str_mv Zavala, Carlos Alberto; Maretto, Hernán; Di Meglio, Mariano; Hierarchy of bounding surfaces in aeolian sandstones of the Tordillo Formation (Jurassic). Neuquén Basin, Argentina; Universitat de Barcelona. Facultat de Geologia; Geológica Acta; 3; 2; 12-2005; 133-145
1695-6133
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://revistes.ub.edu/index.php/GEOACTA/article/view/105.000001402
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Universitat de Barcelona. Facultat de Geologia
publisher.none.fl_str_mv Universitat de Barcelona. Facultat de Geologia
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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