A taphonomic model for the Mesosauride assemblage of the Irati Formation (Paraná Basin, Brazil)

The Irati Formation (Permian, Paraná Basin, Brazil) is made up of a succession of black bituminous and nonbituminous shales and mudstones with interbedded carbonate layers, which record deposition in marine environments. Mesosaur remains are abundant at several sites in this formation, where they oc...

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Detalles Bibliográficos
Autor: Soares, M. B.
Tipo de recurso: artículo
Fecha de publicación:2003
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:86159
Acceso en línea:https://ddd.uab.cat/record/86159
https://dx.doi.org/urn:doi:10.1344/105.000001621
Access Level:acceso abierto
Palabra clave:Taphonomy
Taphofacies
Mesosauridae
Irati Formation
Paraná Basin
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spelling A taphonomic model for the Mesosauride assemblage of the Irati Formation (Paraná Basin, Brazil)Soares, M. B.TaphonomyTaphofaciesMesosauridaeIrati FormationParaná BasinThe Irati Formation (Permian, Paraná Basin, Brazil) is made up of a succession of black bituminous and nonbituminous shales and mudstones with interbedded carbonate layers, which record deposition in marine environments. Mesosaur remains are abundant at several sites in this formation, where they occur preserved in centimetre- thick beds and displaying various degrees of skeletal disarticulation. This paper seeks to establish a model to explain the processes that generated the mesosaurian taphocoenosis in the Irati Formation. Three types o successions containing mesosaur remains were analysed: 1) Carbonate turbidite facies in the State of São Paulo; 2) Carbonate tempestite facies in Rio Grande do Sul; 3) Black shale facies in the State of Paraná. Three taphonomic classes are established: Class I) articulated skeletons; Class II) partially articulated skeletons; Class III) isolated bones (including Class IIIA with complete isolated bones and Class IIIB with fragmented isolated bones). Based upon the sedimentological and taphonomic evidence, a taphofacies model is proposed. The hypothesis here advanced is that all accumulations of mesosaur remains resulted from catastrophic mortality caused by storm events. The basic assumption is that these reptiles died and were buried through the action of successive storms that occurred in the Irati Sea. The taphonomic model points to repeated episodic events of burial, erosion, reworking and redeposition of skeletons and suggests significant time averaging. 22003-01-0120032003-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/86159https://dx.doi.org/urn:doi:10.1344/105.000001621reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengopen accesshttp://purl.org/coar/access_right/c_abf2Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre i quan aquestes es distribueixin sota la mateixa llicència que regula l'obra original i es reconegui l'autoria.https://creativecommons.org/licenses/by-sa/3.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:861592026-06-06T12:50:31Z
dc.title.none.fl_str_mv A taphonomic model for the Mesosauride assemblage of the Irati Formation (Paraná Basin, Brazil)
title A taphonomic model for the Mesosauride assemblage of the Irati Formation (Paraná Basin, Brazil)
spellingShingle A taphonomic model for the Mesosauride assemblage of the Irati Formation (Paraná Basin, Brazil)
Soares, M. B.
Taphonomy
Taphofacies
Mesosauridae
Irati Formation
Paraná Basin
title_short A taphonomic model for the Mesosauride assemblage of the Irati Formation (Paraná Basin, Brazil)
title_full A taphonomic model for the Mesosauride assemblage of the Irati Formation (Paraná Basin, Brazil)
title_fullStr A taphonomic model for the Mesosauride assemblage of the Irati Formation (Paraná Basin, Brazil)
title_full_unstemmed A taphonomic model for the Mesosauride assemblage of the Irati Formation (Paraná Basin, Brazil)
title_sort A taphonomic model for the Mesosauride assemblage of the Irati Formation (Paraná Basin, Brazil)
dc.creator.none.fl_str_mv Soares, M. B.
author Soares, M. B.
author_facet Soares, M. B.
author_role author
dc.subject.none.fl_str_mv Taphonomy
Taphofacies
Mesosauridae
Irati Formation
Paraná Basin
topic Taphonomy
Taphofacies
Mesosauridae
Irati Formation
Paraná Basin
description The Irati Formation (Permian, Paraná Basin, Brazil) is made up of a succession of black bituminous and nonbituminous shales and mudstones with interbedded carbonate layers, which record deposition in marine environments. Mesosaur remains are abundant at several sites in this formation, where they occur preserved in centimetre- thick beds and displaying various degrees of skeletal disarticulation. This paper seeks to establish a model to explain the processes that generated the mesosaurian taphocoenosis in the Irati Formation. Three types o successions containing mesosaur remains were analysed: 1) Carbonate turbidite facies in the State of São Paulo; 2) Carbonate tempestite facies in Rio Grande do Sul; 3) Black shale facies in the State of Paraná. Three taphonomic classes are established: Class I) articulated skeletons; Class II) partially articulated skeletons; Class III) isolated bones (including Class IIIA with complete isolated bones and Class IIIB with fragmented isolated bones). Based upon the sedimentological and taphonomic evidence, a taphofacies model is proposed. The hypothesis here advanced is that all accumulations of mesosaur remains resulted from catastrophic mortality caused by storm events. The basic assumption is that these reptiles died and were buried through the action of successive storms that occurred in the Irati Sea. The taphonomic model points to repeated episodic events of burial, erosion, reworking and redeposition of skeletons and suggests significant time averaging.
publishDate 2003
dc.date.none.fl_str_mv 2
2003-01-01
2003
2003-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/86159
https://dx.doi.org/urn:doi:10.1344/105.000001621
url https://ddd.uab.cat/record/86159
https://dx.doi.org/urn:doi:10.1344/105.000001621
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by-sa/3.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
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eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
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