Um novo horizonte de correlação para o triássico superior do Rio Grande do Sul
Autor(a) principal: | |
---|---|
Data de Publicação: | 2004 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/22616 |
Resumo: | A new biozone - called Ictidosaur Assemblage Zone - is proposed to the Upper Triassic Caturrita Formation from Southern Brazil, based on the discovery of a distinct tetrapod association characterized by the presence of little non-mammalian cinodonts including Riograndia guaibensis, Brasilodon quadrangularis and Brasilitherium riograndensis. Besides, the advanced procolophonid Soturnia caliodon, the dinosaur Guaibasaurus candelariensis, the dicynodont Jachaleria candelariensis, indeterminated phytosaurs and sphenodontids were also found in this association. The new biozone overlies the Rhynchosaur Assemblage Zone and encloses the “Jachaleria Level” usually cited for these layers. Stratigraphical sections, as well as facies analysis, facies associations and architectural elements confirms that the new biozone is clearly included in a distinct stratigraphical level, which reflects a marked change in the fluvial pattern of the sequence. The anastomosed/meandering pattern associated to the underlying Rhynchosaur Assemblage Zone turns to a braided to low confinement fluvial system with unconfined flows. The faunal and faciological changes may have been caused by a combined action of climatic, base level and floral changes, probably reflecting the global tendency to an increasing aridity towards the end of the Triassic. It is presumed an early Norian age for the new biozone on basis on its faunal content, on its stratigraphic placement, recovering the Carnian rhynchosaur assemblage and also on the presence of woods, leafs and reproductive structures of conifers, whose morphological pattern is exclusively Triassic. |
id |
UFRGS-2_5d9b490ce3d29d7d2c5c16fa762ac458 |
---|---|
oai_identifier_str |
oai:www.lume.ufrgs.br:10183/22616 |
network_acronym_str |
UFRGS-2 |
network_name_str |
Repositório Institucional da UFRGS |
repository_id_str |
|
spelling |
Rubert, Rogério RoqueSchultz, Cesar Leandro2010-05-20T04:16:22Z20041518-2398http://hdl.handle.net/10183/22616000442818A new biozone - called Ictidosaur Assemblage Zone - is proposed to the Upper Triassic Caturrita Formation from Southern Brazil, based on the discovery of a distinct tetrapod association characterized by the presence of little non-mammalian cinodonts including Riograndia guaibensis, Brasilodon quadrangularis and Brasilitherium riograndensis. Besides, the advanced procolophonid Soturnia caliodon, the dinosaur Guaibasaurus candelariensis, the dicynodont Jachaleria candelariensis, indeterminated phytosaurs and sphenodontids were also found in this association. The new biozone overlies the Rhynchosaur Assemblage Zone and encloses the “Jachaleria Level” usually cited for these layers. Stratigraphical sections, as well as facies analysis, facies associations and architectural elements confirms that the new biozone is clearly included in a distinct stratigraphical level, which reflects a marked change in the fluvial pattern of the sequence. The anastomosed/meandering pattern associated to the underlying Rhynchosaur Assemblage Zone turns to a braided to low confinement fluvial system with unconfined flows. The faunal and faciological changes may have been caused by a combined action of climatic, base level and floral changes, probably reflecting the global tendency to an increasing aridity towards the end of the Triassic. It is presumed an early Norian age for the new biozone on basis on its faunal content, on its stratigraphic placement, recovering the Carnian rhynchosaur assemblage and also on the presence of woods, leafs and reproductive structures of conifers, whose morphological pattern is exclusively Triassic.application/pdfporPesquisas em Geociências. Porto Alegre, RS. Vol. 31, n. 1 (2004), p. 71-88CinodonteGeologia : TriássicoRio Grande do SulUpper triassicCinodontsSouthern BrazilUm novo horizonte de correlação para o triássico superior do Rio Grande do Sulinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000442818.pdf000442818.pdfTexto completoapplication/pdf647272http://www.lume.ufrgs.br/bitstream/10183/22616/1/000442818.pdf848e3956ff01590364329d7d14e0d8a7MD51TEXT000442818.pdf.txt000442818.pdf.txtExtracted Texttext/plain64343http://www.lume.ufrgs.br/bitstream/10183/22616/2/000442818.pdf.txt723643b51e10a548c1d8dbd4151ecdd1MD52THUMBNAIL000442818.pdf.jpg000442818.pdf.jpgGenerated Thumbnailimage/jpeg1567http://www.lume.ufrgs.br/bitstream/10183/22616/3/000442818.pdf.jpga715840a56d5640baf446226ec9d645dMD5310183/226162021-08-18 04:41:22.106865oai:www.lume.ufrgs.br:10183/22616Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2021-08-18T07:41:22Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Um novo horizonte de correlação para o triássico superior do Rio Grande do Sul |
title |
Um novo horizonte de correlação para o triássico superior do Rio Grande do Sul |
spellingShingle |
Um novo horizonte de correlação para o triássico superior do Rio Grande do Sul Rubert, Rogério Roque Cinodonte Geologia : Triássico Rio Grande do Sul Upper triassic Cinodonts Southern Brazil |
title_short |
Um novo horizonte de correlação para o triássico superior do Rio Grande do Sul |
title_full |
Um novo horizonte de correlação para o triássico superior do Rio Grande do Sul |
title_fullStr |
Um novo horizonte de correlação para o triássico superior do Rio Grande do Sul |
title_full_unstemmed |
Um novo horizonte de correlação para o triássico superior do Rio Grande do Sul |
title_sort |
Um novo horizonte de correlação para o triássico superior do Rio Grande do Sul |
author |
Rubert, Rogério Roque |
author_facet |
Rubert, Rogério Roque Schultz, Cesar Leandro |
author_role |
author |
author2 |
Schultz, Cesar Leandro |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Rubert, Rogério Roque Schultz, Cesar Leandro |
dc.subject.por.fl_str_mv |
Cinodonte Geologia : Triássico Rio Grande do Sul |
topic |
Cinodonte Geologia : Triássico Rio Grande do Sul Upper triassic Cinodonts Southern Brazil |
dc.subject.eng.fl_str_mv |
Upper triassic Cinodonts Southern Brazil |
description |
A new biozone - called Ictidosaur Assemblage Zone - is proposed to the Upper Triassic Caturrita Formation from Southern Brazil, based on the discovery of a distinct tetrapod association characterized by the presence of little non-mammalian cinodonts including Riograndia guaibensis, Brasilodon quadrangularis and Brasilitherium riograndensis. Besides, the advanced procolophonid Soturnia caliodon, the dinosaur Guaibasaurus candelariensis, the dicynodont Jachaleria candelariensis, indeterminated phytosaurs and sphenodontids were also found in this association. The new biozone overlies the Rhynchosaur Assemblage Zone and encloses the “Jachaleria Level” usually cited for these layers. Stratigraphical sections, as well as facies analysis, facies associations and architectural elements confirms that the new biozone is clearly included in a distinct stratigraphical level, which reflects a marked change in the fluvial pattern of the sequence. The anastomosed/meandering pattern associated to the underlying Rhynchosaur Assemblage Zone turns to a braided to low confinement fluvial system with unconfined flows. The faunal and faciological changes may have been caused by a combined action of climatic, base level and floral changes, probably reflecting the global tendency to an increasing aridity towards the end of the Triassic. It is presumed an early Norian age for the new biozone on basis on its faunal content, on its stratigraphic placement, recovering the Carnian rhynchosaur assemblage and also on the presence of woods, leafs and reproductive structures of conifers, whose morphological pattern is exclusively Triassic. |
publishDate |
2004 |
dc.date.issued.fl_str_mv |
2004 |
dc.date.accessioned.fl_str_mv |
2010-05-20T04:16:22Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/other |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/22616 |
dc.identifier.issn.pt_BR.fl_str_mv |
1518-2398 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000442818 |
identifier_str_mv |
1518-2398 000442818 |
url |
http://hdl.handle.net/10183/22616 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.ispartof.pt_BR.fl_str_mv |
Pesquisas em Geociências. Porto Alegre, RS. Vol. 31, n. 1 (2004), p. 71-88 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFRGS instname:Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS |
instname_str |
Universidade Federal do Rio Grande do Sul (UFRGS) |
instacron_str |
UFRGS |
institution |
UFRGS |
reponame_str |
Repositório Institucional da UFRGS |
collection |
Repositório Institucional da UFRGS |
bitstream.url.fl_str_mv |
http://www.lume.ufrgs.br/bitstream/10183/22616/1/000442818.pdf http://www.lume.ufrgs.br/bitstream/10183/22616/2/000442818.pdf.txt http://www.lume.ufrgs.br/bitstream/10183/22616/3/000442818.pdf.jpg |
bitstream.checksum.fl_str_mv |
848e3956ff01590364329d7d14e0d8a7 723643b51e10a548c1d8dbd4151ecdd1 a715840a56d5640baf446226ec9d645d |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS) |
repository.mail.fl_str_mv |
|
_version_ |
1801224715562385408 |