Taphocoenoses of the Pimenteira Formation, devonian of the Parnaíba basin, state of Piauí: mapping, inventory and heritage relevance
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Anuário do Instituto de Geociências (Online) |
Texto Completo: | https://revistas.ufrj.br/index.php/aigeo/article/view/6906 |
Resumo: | During fieldwork conducted in the last ten years along the eastern border of the Parnaíba Basin in the State of Piauí, the continuous destruction of fossiliferous outcrops of the Pimenteira Formation has been observed and is clearly a matter of concern. In the current resumption of studies on this formation, the compilation of extensive inventories, covering all fossil groups, as well as the geological context, is a necessary means of protecting the geological heritage. The purpose of the present study is to establish the composition and mode of occurrence of the taphocoenoses and to evaluate the relative importance of the formation's numerous fossiliferous sites, thus contributing to their conservation. The inventory incorporates unpublished data obtained since 2005, information available in the literature, unpublished dissertations and theses, field notebooks, photographs from different periods, and records of Pimenteira Formation samples deposited in the scientific collections of various museums and universities. Since the pioneering work of Caster (1948), the taphocoenoses of the Pimenteira Formation have been characterized as of erratic occurrence and hosted mainly by sandstones. These initial interpretations have undergone significant changes following the 2009 excursion, which revealed new fossiliferous horizons and sites with an array of differing lithologies (siltstones, sandstones, and conglomerates). Based on this inventory, we consider the following to be the most significant outcrops: Morro Branco de Kegel; Rio Sambito; Morro do Cemitério; BR-316/km 318; Itainópolis; Riachão; São João Vermelho; and PI-466/km 12. These sites are the most frequently mentioned in the literature and some have particular historical value and also considerable diversity of taphocoenoses that provide data about the depositional environment, genesis, and age of the fossiliferous deposits. Furthermore, the fossils are better preserved and record more comprehensively the faunal and floral variations of the Devonian seas and adjacent fluvio-deltaic environments. |
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Taphocoenoses of the Pimenteira Formation, devonian of the Parnaíba basin, state of Piauí: mapping, inventory and heritage relevanceTafocenoses da Formação Pimenteira, devoniano da Bacia do Parnaíba, Piauí: mapeamento, inventário e relevância patrimonialDuring fieldwork conducted in the last ten years along the eastern border of the Parnaíba Basin in the State of Piauí, the continuous destruction of fossiliferous outcrops of the Pimenteira Formation has been observed and is clearly a matter of concern. In the current resumption of studies on this formation, the compilation of extensive inventories, covering all fossil groups, as well as the geological context, is a necessary means of protecting the geological heritage. The purpose of the present study is to establish the composition and mode of occurrence of the taphocoenoses and to evaluate the relative importance of the formation's numerous fossiliferous sites, thus contributing to their conservation. The inventory incorporates unpublished data obtained since 2005, information available in the literature, unpublished dissertations and theses, field notebooks, photographs from different periods, and records of Pimenteira Formation samples deposited in the scientific collections of various museums and universities. Since the pioneering work of Caster (1948), the taphocoenoses of the Pimenteira Formation have been characterized as of erratic occurrence and hosted mainly by sandstones. These initial interpretations have undergone significant changes following the 2009 excursion, which revealed new fossiliferous horizons and sites with an array of differing lithologies (siltstones, sandstones, and conglomerates). Based on this inventory, we consider the following to be the most significant outcrops: Morro Branco de Kegel; Rio Sambito; Morro do Cemitério; BR-316/km 318; Itainópolis; Riachão; São João Vermelho; and PI-466/km 12. These sites are the most frequently mentioned in the literature and some have particular historical value and also considerable diversity of taphocoenoses that provide data about the depositional environment, genesis, and age of the fossiliferous deposits. Furthermore, the fossils are better preserved and record more comprehensively the faunal and floral variations of the Devonian seas and adjacent fluvio-deltaic environments.Durante trabalhos de campo realizados nos últimos dez anos ao longo da borda leste da Bacia do Parnaíba, no Estado do Piauí, tem-se observado uma contínua destruição de afloramentos fossilíferos da Formação Pimenteira, sendo claramente motivo de preocupação. No atual momento de retomada dos estudos sobre esta formação, a realização de inventários amplos, abrangendo todos os grupos fósseis de determinadas regiões, assim como seu contexto geológico, é uma forma de proteção ao patrimônio geológico que deve ser efetuada. O objetivo do presente trabalho é a caracterização da composição e do modo de ocorrência das tafocenoses, além da valoração relativa da importância dos numerosos sítios fossilíferos da Formação Pimenteira, contribuindo para a sua conservação. Este levantamento reúne dados inéditos obtidos a partir de 2005, informações disponíveis na literatura e dados não publicados, como dissertações e teses, cadernetas de campo, fotos de diversas épocas e registros de amostras da Formação Pimenteira depositadas em coleções científicas de diferentes museus e universidades. Desde o trabalho pioneiro de Caster (1948), as tafocenoses da Formação Pimenteira têm sido caracterizadas como erráticas e relacionadas principalmente aos arenitos. Estas interpretações iniciais sofreram alteração significativa após a excursão realizada em 2009, que revelou novos sítios e horizontes fossilíferos em depósitos com litologias diversas (siltitos, arenitos e conglomerados). Com base no presente inventário, consideram-se como mais relevantes os seguintes afloramentos: Morro Branco de Kegel, Rio Sambito, Morro do Cemitério, BR-316/km 318, Itainópolis, Riachão, São João Vermelho e PI-466/km 12. Estas localidades são as mais citadas na literatura e algumas apresentam maior valor histórico e uma considerável diversidade de tafocenoses capazes de fornecer dados sobre o paleoambiente deposicional, a gênese e a idade dos depósitos fossilíferos. Além disso, os fósseis estão mais bem preservados e documentam de forma mais ampla as variações faunísticas e florísticas dos mares devonianos e dos ambientes flúvio-deltaicos do entorno.Universidade Federal do Rio de Janeiro2012-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://revistas.ufrj.br/index.php/aigeo/article/view/690610.11137/2012_1_05_27Anuário do Instituto de Geociências; Vol 35, No 1 (2012); 5-27Anuário do Instituto de Geociências; Vol 35, No 1 (2012); 5-271982-39080101-9759reponame:Anuário do Instituto de Geociências (Online)instname:Universidade Federal do Rio de Janeiro (UFRJ)instacron:UFRJporhttps://revistas.ufrj.br/index.php/aigeo/article/view/6906/5473Copyright (c) 2012 Anuário do Instituto de Geociênciashttp://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessPonciano, Luiza Corral Martins de OliveiraCastro, Aline Rocha de Souza Ferreira deFonseca, Vera Maria Medina daMachado, Deusana Maria da Costa2017-01-23T22:32:36Zoai:www.revistas.ufrj.br:article/6906Revistahttps://revistas.ufrj.br/index.php/aigeo/indexPUBhttps://revistas.ufrj.br/index.php/aigeo/oaianuario@igeo.ufrj.br||1982-39080101-9759opendoar:2017-01-23T22:32:36Anuário do Instituto de Geociências (Online) - Universidade Federal do Rio de Janeiro (UFRJ)false |
dc.title.none.fl_str_mv |
Taphocoenoses of the Pimenteira Formation, devonian of the Parnaíba basin, state of Piauí: mapping, inventory and heritage relevance Tafocenoses da Formação Pimenteira, devoniano da Bacia do Parnaíba, Piauí: mapeamento, inventário e relevância patrimonial |
title |
Taphocoenoses of the Pimenteira Formation, devonian of the Parnaíba basin, state of Piauí: mapping, inventory and heritage relevance |
spellingShingle |
Taphocoenoses of the Pimenteira Formation, devonian of the Parnaíba basin, state of Piauí: mapping, inventory and heritage relevance Ponciano, Luiza Corral Martins de Oliveira |
title_short |
Taphocoenoses of the Pimenteira Formation, devonian of the Parnaíba basin, state of Piauí: mapping, inventory and heritage relevance |
title_full |
Taphocoenoses of the Pimenteira Formation, devonian of the Parnaíba basin, state of Piauí: mapping, inventory and heritage relevance |
title_fullStr |
Taphocoenoses of the Pimenteira Formation, devonian of the Parnaíba basin, state of Piauí: mapping, inventory and heritage relevance |
title_full_unstemmed |
Taphocoenoses of the Pimenteira Formation, devonian of the Parnaíba basin, state of Piauí: mapping, inventory and heritage relevance |
title_sort |
Taphocoenoses of the Pimenteira Formation, devonian of the Parnaíba basin, state of Piauí: mapping, inventory and heritage relevance |
author |
Ponciano, Luiza Corral Martins de Oliveira |
author_facet |
Ponciano, Luiza Corral Martins de Oliveira Castro, Aline Rocha de Souza Ferreira de Fonseca, Vera Maria Medina da Machado, Deusana Maria da Costa |
author_role |
author |
author2 |
Castro, Aline Rocha de Souza Ferreira de Fonseca, Vera Maria Medina da Machado, Deusana Maria da Costa |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Ponciano, Luiza Corral Martins de Oliveira Castro, Aline Rocha de Souza Ferreira de Fonseca, Vera Maria Medina da Machado, Deusana Maria da Costa |
description |
During fieldwork conducted in the last ten years along the eastern border of the Parnaíba Basin in the State of Piauí, the continuous destruction of fossiliferous outcrops of the Pimenteira Formation has been observed and is clearly a matter of concern. In the current resumption of studies on this formation, the compilation of extensive inventories, covering all fossil groups, as well as the geological context, is a necessary means of protecting the geological heritage. The purpose of the present study is to establish the composition and mode of occurrence of the taphocoenoses and to evaluate the relative importance of the formation's numerous fossiliferous sites, thus contributing to their conservation. The inventory incorporates unpublished data obtained since 2005, information available in the literature, unpublished dissertations and theses, field notebooks, photographs from different periods, and records of Pimenteira Formation samples deposited in the scientific collections of various museums and universities. Since the pioneering work of Caster (1948), the taphocoenoses of the Pimenteira Formation have been characterized as of erratic occurrence and hosted mainly by sandstones. These initial interpretations have undergone significant changes following the 2009 excursion, which revealed new fossiliferous horizons and sites with an array of differing lithologies (siltstones, sandstones, and conglomerates). Based on this inventory, we consider the following to be the most significant outcrops: Morro Branco de Kegel; Rio Sambito; Morro do Cemitério; BR-316/km 318; Itainópolis; Riachão; São João Vermelho; and PI-466/km 12. These sites are the most frequently mentioned in the literature and some have particular historical value and also considerable diversity of taphocoenoses that provide data about the depositional environment, genesis, and age of the fossiliferous deposits. Furthermore, the fossils are better preserved and record more comprehensively the faunal and floral variations of the Devonian seas and adjacent fluvio-deltaic environments. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-06-01 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://revistas.ufrj.br/index.php/aigeo/article/view/6906 10.11137/2012_1_05_27 |
url |
https://revistas.ufrj.br/index.php/aigeo/article/view/6906 |
identifier_str_mv |
10.11137/2012_1_05_27 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://revistas.ufrj.br/index.php/aigeo/article/view/6906/5473 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2012 Anuário do Instituto de Geociências http://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2012 Anuário do Instituto de Geociências http://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal do Rio de Janeiro |
publisher.none.fl_str_mv |
Universidade Federal do Rio de Janeiro |
dc.source.none.fl_str_mv |
Anuário do Instituto de Geociências; Vol 35, No 1 (2012); 5-27 Anuário do Instituto de Geociências; Vol 35, No 1 (2012); 5-27 1982-3908 0101-9759 reponame:Anuário do Instituto de Geociências (Online) instname:Universidade Federal do Rio de Janeiro (UFRJ) instacron:UFRJ |
instname_str |
Universidade Federal do Rio de Janeiro (UFRJ) |
instacron_str |
UFRJ |
institution |
UFRJ |
reponame_str |
Anuário do Instituto de Geociências (Online) |
collection |
Anuário do Instituto de Geociências (Online) |
repository.name.fl_str_mv |
Anuário do Instituto de Geociências (Online) - Universidade Federal do Rio de Janeiro (UFRJ) |
repository.mail.fl_str_mv |
anuario@igeo.ufrj.br|| |
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1797053540123803648 |