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

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....

Full description

Bibliographic Details
Authors: Zavala, Carlos Alberto, Maretto, Hernán, Di Meglio, Mariano
Format: article
Status:Published version
Publication Date:2005
Country:Argentina
Institution:Consejo Nacional de Investigaciones Científicas y Técnicas
Repository:CONICET Digital (CONICET)
Language:English
OAI Identifier:oai:ri.conicet.gov.ar:11336/28889
Online Access:http://hdl.handle.net/11336/28889
Access Level:Open access
Keyword:Aeolian deposits
Tordillo Formation
Neuquén Basin
Argentina
Jurassic
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
id AR_9da4471dc0d2fb38de9ae12e1bd3966f
oai_identifier_str oai:ri.conicet.gov.ar:11336/28889
network_acronym_str AR
network_name_str Argentina
repository_id_str
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 Técnicas2024-05-08T14:22:27Zoai: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:34982024-05-08 14:22:27.908CONICET 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
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
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
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
topic Aeolian deposits
Tordillo Formation
Neuquén Basin
Argentina
Jurassic
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
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
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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
_version_ 1799196304966942720
score 15,812429

Similar Items