Microbially induced pseudotraces from a Pantanal soda lake, Brazil : Alternative interpretations for Ediacaran simple trails and their limits

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...

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Autores principales: Veríssimo Warren, Lucas, Buatois, Luis A., Mángano, María Gabriela, Simões, Marcello Guimarães, Santos, Maurício G. M., Poiré, Daniel Gustavo, Riccomini, Claudio, Assine, Marío Luis
Formato: Articulo
Lenguaje:Inglés
Publicado: 2020
Materias:
Geología
fossils
Ediacaran structures
pseudotraces
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/132768
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-132768
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geología
fossils
Ediacaran structures
pseudotraces
spellingShingle Geología
fossils
Ediacaran structures
pseudotraces
Veríssimo Warren, Lucas
Buatois, Luis A.
Mángano, María Gabriela
Simões, Marcello Guimarães
Santos, Maurício G. M.
Poiré, Daniel Gustavo
Riccomini, Claudio
Assine, Marío Luis
Microbially induced pseudotraces from a Pantanal soda lake, Brazil : Alternative interpretations for Ediacaran simple trails and their limits
topic_facet Geología
fossils
Ediacaran structures
pseudotraces
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.
format Articulo
Articulo
author Veríssimo Warren, Lucas
Buatois, Luis A.
Mángano, María Gabriela
Simões, Marcello Guimarães
Santos, Maurício G. M.
Poiré, Daniel Gustavo
Riccomini, Claudio
Assine, Marío Luis
author_facet Veríssimo Warren, Lucas
Buatois, Luis A.
Mángano, María Gabriela
Simões, Marcello Guimarães
Santos, Maurício G. M.
Poiré, Daniel Gustavo
Riccomini, Claudio
Assine, Marío Luis
author_sort Veríssimo Warren, Lucas
title Microbially induced pseudotraces from a Pantanal soda lake, Brazil : Alternative interpretations for Ediacaran simple trails and their limits
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
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/132768
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