Microbially induced pseudotraces from a Pantanal soda lake, Brazil: Alternative interpretations for Ediacaran simple trails and their limits
Autor(a) principal: | |
---|---|
Data de Publicação: | 2020 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1130/G47234.1 http://hdl.handle.net/11449/209485 |
Resumo: | Despite the absence of metazoans, structures resembling animal traces are common in a soda lake from the western Brazil Pantanal wetland. Pantanal soda lakes are ecologically extreme environments that preclude complex life, allowing extremophiles to flourish. Direct observation indicates that these structures are pseudotraces, representing groove marks that result from the interaction of wave-transported floating rafts of epibenthic microbial mat fragments with the substrate. Variations in wind/wave direction and intensity result in marks of different size and morphology. The most common pseudotraces are simple and slightly curved, narrow grooves (type 1), whereas others are straight and present raised lateral ridges (type 2). Both are V-shaped in cross section. Type 3 comprises long, sinuous, shallow grooves, displaying internal crescentic laminated infill and U-shaped cross section. The similarity of these pseudotraces to Ediacaran structures usually interpreted as animal trace fossils suggests that care should be exercised in their analysis. A set of criteria is proposed to differentiate microbially induced pseudotraces from trace fossils. Analysis of Ediacaran structures needs to be performed on a case-by-case basis, taking into account morphology, orientation, and preservation style of the structure, sedimentary environment, and presence or absence of microbial mats. |
id |
UNSP_f1db93a034616b66187262872ebc4485 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/209485 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Microbially induced pseudotraces from a Pantanal soda lake, Brazil: Alternative interpretations for Ediacaran simple trails and their limitsDespite the absence of metazoans, structures resembling animal traces are common in a soda lake from the western Brazil Pantanal wetland. Pantanal soda lakes are ecologically extreme environments that preclude complex life, allowing extremophiles to flourish. Direct observation indicates that these structures are pseudotraces, representing groove marks that result from the interaction of wave-transported floating rafts of epibenthic microbial mat fragments with the substrate. Variations in wind/wave direction and intensity result in marks of different size and morphology. The most common pseudotraces are simple and slightly curved, narrow grooves (type 1), whereas others are straight and present raised lateral ridges (type 2). Both are V-shaped in cross section. Type 3 comprises long, sinuous, shallow grooves, displaying internal crescentic laminated infill and U-shaped cross section. The similarity of these pseudotraces to Ediacaran structures usually interpreted as animal trace fossils suggests that care should be exercised in their analysis. A set of criteria is proposed to differentiate microbially induced pseudotraces from trace fossils. Analysis of Ediacaran structures needs to be performed on a case-by-case basis, taking into account morphology, orientation, and preservation style of the structure, sedimentary environment, and presence or absence of microbial mats.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Natural Sciences and Engineering Research Council of Canada (NSERC)Sao Paulo State Univ, Dept Geol, BR-13506900 Rio Claro, BrazilUniv Saskatchewan, Dept Geol Sci, Saskatoon, SK S7N 5E2, CanadaSao Paulo State Univ, Dept Zool, BR-18618000 Botucatu, SP, BrazilUniv Fed ABC, Ctr Engn Modelagem & Ciencias Sociais Aplicadas, BR-09210580 Santo Andre, SP, BrazilUniv Nacl La Plata, CONICET, Ctr Invest Geol, RA-1900 La Plata, ArgentinaUniv Sao Paulo, Inst Energia & Ambiente, BR-05508010 Sao Paulo, BrazilSao Paulo State Univ, Dept Geol, BR-13506900 Rio Claro, BrazilSao Paulo State Univ, Dept Zool, BR-18618000 Botucatu, SP, BrazilCNPq: 2014/068892CNPq: 2014/13937-3FAPESP: 2018/26230-6Natural Sciences and Engineering Research Council of Canada (NSERC): 311726-13Natural Sciences and Engineering Research Council of Canada (NSERC): 311727-15Geological Soc Amer, IncUniversidade Estadual Paulista (Unesp)Univ SaskatchewanUniversidade Federal do ABC (UFABC)Univ Nacl La PlataUniversidade de São Paulo (USP)Warren, L. [UNESP]Buatois, L. A.Mangano, M. G.Simoes, M. G. [UNESP]Santos, M. G. M.Poir, D. G.Riccomini, C.Assine, M. L. [UNESP]2021-06-25T12:20:05Z2021-06-25T12:20:05Z2020-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article857-861http://dx.doi.org/10.1130/G47234.1Geology. Boulder: Geological Soc Amer, Inc, v. 48, n. 9, p. 857-861, 2020.0091-7613http://hdl.handle.net/11449/20948510.1130/G47234.1WOS:000572358200002Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengGeologyinfo:eu-repo/semantics/openAccess2021-10-23T19:28:13Zoai:repositorio.unesp.br:11449/209485Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T19:28:13Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Microbially induced pseudotraces from a Pantanal soda lake, Brazil: Alternative interpretations for Ediacaran simple trails and their limits |
title |
Microbially induced pseudotraces from a Pantanal soda lake, Brazil: Alternative interpretations for Ediacaran simple trails and their limits |
spellingShingle |
Microbially induced pseudotraces from a Pantanal soda lake, Brazil: Alternative interpretations for Ediacaran simple trails and their limits Warren, L. [UNESP] |
title_short |
Microbially induced pseudotraces from a Pantanal soda lake, Brazil: Alternative interpretations for Ediacaran simple trails and their limits |
title_full |
Microbially induced pseudotraces from a Pantanal soda lake, Brazil: Alternative interpretations for Ediacaran simple trails and their limits |
title_fullStr |
Microbially induced pseudotraces from a Pantanal soda lake, Brazil: Alternative interpretations for Ediacaran simple trails and their limits |
title_full_unstemmed |
Microbially induced pseudotraces from a Pantanal soda lake, Brazil: Alternative interpretations for Ediacaran simple trails and their limits |
title_sort |
Microbially induced pseudotraces from a Pantanal soda lake, Brazil: Alternative interpretations for Ediacaran simple trails and their limits |
author |
Warren, L. [UNESP] |
author_facet |
Warren, L. [UNESP] Buatois, L. A. Mangano, M. G. Simoes, M. G. [UNESP] Santos, M. G. M. Poir, D. G. Riccomini, C. Assine, M. L. [UNESP] |
author_role |
author |
author2 |
Buatois, L. A. Mangano, M. G. Simoes, M. G. [UNESP] Santos, M. G. M. Poir, D. G. Riccomini, C. Assine, M. L. [UNESP] |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Univ Saskatchewan Universidade Federal do ABC (UFABC) Univ Nacl La Plata Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Warren, L. [UNESP] Buatois, L. A. Mangano, M. G. Simoes, M. G. [UNESP] Santos, M. G. M. Poir, D. G. Riccomini, C. Assine, M. L. [UNESP] |
description |
Despite the absence of metazoans, structures resembling animal traces are common in a soda lake from the western Brazil Pantanal wetland. Pantanal soda lakes are ecologically extreme environments that preclude complex life, allowing extremophiles to flourish. Direct observation indicates that these structures are pseudotraces, representing groove marks that result from the interaction of wave-transported floating rafts of epibenthic microbial mat fragments with the substrate. Variations in wind/wave direction and intensity result in marks of different size and morphology. The most common pseudotraces are simple and slightly curved, narrow grooves (type 1), whereas others are straight and present raised lateral ridges (type 2). Both are V-shaped in cross section. Type 3 comprises long, sinuous, shallow grooves, displaying internal crescentic laminated infill and U-shaped cross section. The similarity of these pseudotraces to Ediacaran structures usually interpreted as animal trace fossils suggests that care should be exercised in their analysis. A set of criteria is proposed to differentiate microbially induced pseudotraces from trace fossils. Analysis of Ediacaran structures needs to be performed on a case-by-case basis, taking into account morphology, orientation, and preservation style of the structure, sedimentary environment, and presence or absence of microbial mats. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-09-01 2021-06-25T12:20:05Z 2021-06-25T12:20:05Z |
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/10.1130/G47234.1 Geology. Boulder: Geological Soc Amer, Inc, v. 48, n. 9, p. 857-861, 2020. 0091-7613 http://hdl.handle.net/11449/209485 10.1130/G47234.1 WOS:000572358200002 |
url |
http://dx.doi.org/10.1130/G47234.1 http://hdl.handle.net/11449/209485 |
identifier_str_mv |
Geology. Boulder: Geological Soc Amer, Inc, v. 48, n. 9, p. 857-861, 2020. 0091-7613 10.1130/G47234.1 WOS:000572358200002 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Geology |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
857-861 |
dc.publisher.none.fl_str_mv |
Geological Soc Amer, Inc |
publisher.none.fl_str_mv |
Geological Soc Amer, Inc |
dc.source.none.fl_str_mv |
Web of Science 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 |
|
_version_ |
1797789686323740672 |