A taphonomic model for the Mesosauridae assemblage of the Irati Formation (Paraná Basin, Brazil)
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| Natura: | Artículo científico |
| Lingua: | en |
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Universitat de Barcelona
2003
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| _version_ | 1876456522198810624 |
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| author | M. B. Soares |
| author_facet | M. B. Soares |
| contents | A taphonomic model for the Mesosauridae assemblage of the Irati Formation (Paraná Basin, Brazil) M. B. Soares Ciencias de la Tierra Taphonomy Taphofacies Mesosauridae Paraná Basin Irati Formation The Irati Formation (Permian, Paraná Basin, Brazil) is made up of a succession of black bituminous and nonbituminousshales 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 amodel to explain the processes that generated the mesosaurian taphocoenosis in the Irati Formation. Three typeso successions containing mesosaur remains were analysed: 1) Carbonate turbidite facies in the State of SãoPaulo; 2) Carbonate tempestite facies in Rio Grande do Sul; 3) Black shale facies in the State of Paraná. Threetaphonomic classes are established: Class I) articulated skeletons; Class II) partially articulated skeletons; ClassIII) isolated bones (including Class IIIA with complete isolated bones and Class IIIB with fragmented isolatedbones). Based upon the sedimentological and taphonomic evidence, a taphofacies model is proposed. Thehypothesis here advanced is that all accumulations of mesosaur remains resulted from catastrophic mortalitycaused by storm events. The basic assumption is that these reptiles died and were buried through the action ofsuccessive storms that occurred in the Irati Sea. The taphonomic model points to repeated episodic events ofburial, erosion, reworking and redeposition of skeletons and suggests significant time averaging. 2003 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50510404 en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.4 Vol.1 |
| format | Artículo científico |
| id | redalyc_50510404 |
| institution | Redalyc |
| language | en |
| publishDate | 2003 |
| publisher | Universitat de Barcelona |
| spellingShingle | A taphonomic model for the Mesosauridae assemblage of the Irati Formation (Paraná Basin, Brazil) M. B. Soares Ciencias de la Tierra Taphonomy Taphofacies Mesosauridae Paraná Basin Irati Formation A taphonomic model for the Mesosauridae assemblage of the Irati Formation (Paraná Basin, Brazil) M. B. Soares Ciencias de la Tierra Taphonomy Taphofacies Mesosauridae Paraná Basin Irati Formation The Irati Formation (Permian, Paraná Basin, Brazil) is made up of a succession of black bituminous and nonbituminousshales 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 amodel to explain the processes that generated the mesosaurian taphocoenosis in the Irati Formation. Three typeso successions containing mesosaur remains were analysed: 1) Carbonate turbidite facies in the State of SãoPaulo; 2) Carbonate tempestite facies in Rio Grande do Sul; 3) Black shale facies in the State of Paraná. Threetaphonomic classes are established: Class I) articulated skeletons; Class II) partially articulated skeletons; ClassIII) isolated bones (including Class IIIA with complete isolated bones and Class IIIB with fragmented isolatedbones). Based upon the sedimentological and taphonomic evidence, a taphofacies model is proposed. Thehypothesis here advanced is that all accumulations of mesosaur remains resulted from catastrophic mortalitycaused by storm events. The basic assumption is that these reptiles died and were buried through the action ofsuccessive storms that occurred in the Irati Sea. The taphonomic model points to repeated episodic events ofburial, erosion, reworking and redeposition of skeletons and suggests significant time averaging. 2003 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50510404 en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.4 Vol.1 |
| title | A taphonomic model for the Mesosauridae assemblage of the Irati Formation (Paraná Basin, Brazil) |
| topic | Ciencias de la Tierra Taphonomy Taphofacies Mesosauridae Paraná Basin Irati Formation |
| url | https://www.redalyc.org/articulo.oa?id=50510404 |