Tafonomia de biválvios em calcários oolíticos da formação Teresina (Bacia do Paraná, permiano médio, prudentópolis, PR)
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.5327/Z1519-874X2010000300002 http://hdl.handle.net/11449/226105 |
Resumo: | Herein, it is presented the first detailed taphonomic study on bivalve mollusk shells preserved in the oolitic limestones of the Teresina Formation (probably Kungurian-Roadian, Lower-Middle Permian) in the eastern margin of the Paraná basin. The selected beds are located in two quarries (informally named PRU 1 and PRU 2) in Prudentópolis municipality (Center-South Paraná State), and positioned approximately in the middle of the formation and probably in the Pinzonella illusa Zone. The PRU 1 limestone (∼30 cm thick), which is partially silicified and intercalated with predominantly pelitic rocks, is classified as a bivalve oolitic grainstone. The basal contact is erosive and the top shows symmetrical ripple marks, which are draped by shale with mud cracks. There are two fining-upwards successions characterized by dense to dispersed packing of the shells, which are usually disarticulated, randomly oriented (many nested/stacked) and mixed with some pelitic intraclasts. Microhummocky cross-stratification occurs a little below the top of the bed. The PRU2 bed is classified as ooidbivalve rudstone (∼5 cm thick), where all shells are disarticulated and fragmented, showing dense packing. The bivalves probably inhabited a muddy substrate and were mixed (as parautochtonous and allochthonous bioclasts) with ooids during high-energy storm events, including posterior shell displacement as a result of bioturbation. Thus, the calcareous beds represent amalgamated proximal tempestites with a complex taphonomic history, strong temporal/spatial mixing of bioclasts and limited paleoecological resolution. They are a typical example of shell beds generated in a huge epeiric sea, which was not necessarily connected to the ocean and where very low depositional-slope gradient, very slow subsidence and minimum sediment accommodation space caused frequent sediment reworking by storm related processes. |
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Tafonomia de biválvios em calcários oolíticos da formação Teresina (Bacia do Paraná, permiano médio, prudentópolis, PR)Taphonomy of bivalve mollusks in oolitic limestones from Teresina Formation (Paraná Basin, Middle Permian, prudentópolis, PR)LimestoneParaná BasinPermianTaphonomyTeresina FormationHerein, it is presented the first detailed taphonomic study on bivalve mollusk shells preserved in the oolitic limestones of the Teresina Formation (probably Kungurian-Roadian, Lower-Middle Permian) in the eastern margin of the Paraná basin. The selected beds are located in two quarries (informally named PRU 1 and PRU 2) in Prudentópolis municipality (Center-South Paraná State), and positioned approximately in the middle of the formation and probably in the Pinzonella illusa Zone. The PRU 1 limestone (∼30 cm thick), which is partially silicified and intercalated with predominantly pelitic rocks, is classified as a bivalve oolitic grainstone. The basal contact is erosive and the top shows symmetrical ripple marks, which are draped by shale with mud cracks. There are two fining-upwards successions characterized by dense to dispersed packing of the shells, which are usually disarticulated, randomly oriented (many nested/stacked) and mixed with some pelitic intraclasts. Microhummocky cross-stratification occurs a little below the top of the bed. The PRU2 bed is classified as ooidbivalve rudstone (∼5 cm thick), where all shells are disarticulated and fragmented, showing dense packing. The bivalves probably inhabited a muddy substrate and were mixed (as parautochtonous and allochthonous bioclasts) with ooids during high-energy storm events, including posterior shell displacement as a result of bioturbation. Thus, the calcareous beds represent amalgamated proximal tempestites with a complex taphonomic history, strong temporal/spatial mixing of bioclasts and limited paleoecological resolution. They are a typical example of shell beds generated in a huge epeiric sea, which was not necessarily connected to the ocean and where very low depositional-slope gradient, very slow subsidence and minimum sediment accommodation space caused frequent sediment reworking by storm related processes.Departamento de Zoologia Instituto de Biociências UNESP, Distrito de Rubião Júnior s/n, CEP 18618-000, Botucatu, SPDepto. de Geologia Aplicada Instituto de Geociências e Ciências Exatas UNESP, Rio Claro, SP, BRDepartamento de Zoologia Instituto de Biociências UNESP, Distrito de Rubião Júnior s/n, CEP 18618-000, Botucatu, SPDepto. de Geologia Aplicada Instituto de Geociências e Ciências Exatas UNESP, Rio Claro, SP, BRUniversidade Estadual Paulista (UNESP)Neves, Jacqueline Peixoto [UNESP]Rohn, Rosemarie [UNESP]Simões, Marcello Guimarães [UNESP]2022-04-28T21:25:30Z2022-04-28T21:25:30Z2010-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article19-36http://dx.doi.org/10.5327/Z1519-874X2010000300002Geologia USP - Serie Cientifica, v. 10, n. 3, p. 19-36, 2010.1519-874Xhttp://hdl.handle.net/11449/22610510.5327/Z1519-874X20100003000022-s2.0-78149277432Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporGeologia USP - Serie Cientificainfo:eu-repo/semantics/openAccess2022-04-28T21:25:30Zoai:repositorio.unesp.br:11449/226105Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-06T00:04:48.700150Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Tafonomia de biválvios em calcários oolíticos da formação Teresina (Bacia do Paraná, permiano médio, prudentópolis, PR) Taphonomy of bivalve mollusks in oolitic limestones from Teresina Formation (Paraná Basin, Middle Permian, prudentópolis, PR) |
title |
Tafonomia de biválvios em calcários oolíticos da formação Teresina (Bacia do Paraná, permiano médio, prudentópolis, PR) |
spellingShingle |
Tafonomia de biválvios em calcários oolíticos da formação Teresina (Bacia do Paraná, permiano médio, prudentópolis, PR) Neves, Jacqueline Peixoto [UNESP] Limestone Paraná Basin Permian Taphonomy Teresina Formation |
title_short |
Tafonomia de biválvios em calcários oolíticos da formação Teresina (Bacia do Paraná, permiano médio, prudentópolis, PR) |
title_full |
Tafonomia de biválvios em calcários oolíticos da formação Teresina (Bacia do Paraná, permiano médio, prudentópolis, PR) |
title_fullStr |
Tafonomia de biválvios em calcários oolíticos da formação Teresina (Bacia do Paraná, permiano médio, prudentópolis, PR) |
title_full_unstemmed |
Tafonomia de biválvios em calcários oolíticos da formação Teresina (Bacia do Paraná, permiano médio, prudentópolis, PR) |
title_sort |
Tafonomia de biválvios em calcários oolíticos da formação Teresina (Bacia do Paraná, permiano médio, prudentópolis, PR) |
author |
Neves, Jacqueline Peixoto [UNESP] |
author_facet |
Neves, Jacqueline Peixoto [UNESP] Rohn, Rosemarie [UNESP] Simões, Marcello Guimarães [UNESP] |
author_role |
author |
author2 |
Rohn, Rosemarie [UNESP] Simões, Marcello Guimarães [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Neves, Jacqueline Peixoto [UNESP] Rohn, Rosemarie [UNESP] Simões, Marcello Guimarães [UNESP] |
dc.subject.por.fl_str_mv |
Limestone Paraná Basin Permian Taphonomy Teresina Formation |
topic |
Limestone Paraná Basin Permian Taphonomy Teresina Formation |
description |
Herein, it is presented the first detailed taphonomic study on bivalve mollusk shells preserved in the oolitic limestones of the Teresina Formation (probably Kungurian-Roadian, Lower-Middle Permian) in the eastern margin of the Paraná basin. The selected beds are located in two quarries (informally named PRU 1 and PRU 2) in Prudentópolis municipality (Center-South Paraná State), and positioned approximately in the middle of the formation and probably in the Pinzonella illusa Zone. The PRU 1 limestone (∼30 cm thick), which is partially silicified and intercalated with predominantly pelitic rocks, is classified as a bivalve oolitic grainstone. The basal contact is erosive and the top shows symmetrical ripple marks, which are draped by shale with mud cracks. There are two fining-upwards successions characterized by dense to dispersed packing of the shells, which are usually disarticulated, randomly oriented (many nested/stacked) and mixed with some pelitic intraclasts. Microhummocky cross-stratification occurs a little below the top of the bed. The PRU2 bed is classified as ooidbivalve rudstone (∼5 cm thick), where all shells are disarticulated and fragmented, showing dense packing. The bivalves probably inhabited a muddy substrate and were mixed (as parautochtonous and allochthonous bioclasts) with ooids during high-energy storm events, including posterior shell displacement as a result of bioturbation. Thus, the calcareous beds represent amalgamated proximal tempestites with a complex taphonomic history, strong temporal/spatial mixing of bioclasts and limited paleoecological resolution. They are a typical example of shell beds generated in a huge epeiric sea, which was not necessarily connected to the ocean and where very low depositional-slope gradient, very slow subsidence and minimum sediment accommodation space caused frequent sediment reworking by storm related processes. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-01-01 2022-04-28T21:25:30Z 2022-04-28T21:25:30Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.5327/Z1519-874X2010000300002 Geologia USP - Serie Cientifica, v. 10, n. 3, p. 19-36, 2010. 1519-874X http://hdl.handle.net/11449/226105 10.5327/Z1519-874X2010000300002 2-s2.0-78149277432 |
url |
http://dx.doi.org/10.5327/Z1519-874X2010000300002 http://hdl.handle.net/11449/226105 |
identifier_str_mv |
Geologia USP - Serie Cientifica, v. 10, n. 3, p. 19-36, 2010. 1519-874X 10.5327/Z1519-874X2010000300002 2-s2.0-78149277432 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Geologia USP - Serie Cientifica |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
19-36 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1808129580480856064 |