New ichnological records and paleoenvironment to the Pimenteira Formation, Devonian of Parnaíba Basin, Piauí, Brazil

Authors

  • Rafael Costa da Silva Companhia de Pesquisa de Recursos Minerais. Serviço Geológico do Brasil, Departamento de Geologia/Divisão de Paleontologia. Av. Pasteur, 404, Urca, 22290-240, Rio de Janeiro, RJ, Brasil.
  • Victor Hugo Dominato Universidade Federal do Rio de Janeiro. Programa de Pós-Graduação em Geologia, Instituto de Geociências. Av. Athos da Silveira Ramos, 274, Bloco G, Cidade Universitária, Ilha do Fundão, 21941-916, Rio de Janeiro, RJ, Brasil.
  • Antônio Carlos Sequeira Fernandes Universidade Federal do Rio de Janeiro. Museu Nacional, Departamento de Geologia e Paleontologia. Quinta da Boa Vista, s/n, São Cristóvão, 20940-040, Rio de Janeiro, RJ, Brasil.

DOI:

https://doi.org/10.4013/gaea.2012.81.05

Abstract

An ichnological study in a sandy-silt interval of Pimenteira Formation allowed the recognition of new expositions and trace fossil occurrences. The ichnogenus Protovirgularia Gumbel is for the first time recorded and described to this unit and eight other ichnospecies were recognized: Bergaueria cf. B. prantli, Lockeiasiliquaria, Protopalaeodictyon spinata, Protovirgularia aff. P. rugosa, Protovirgularia dichotoma, Rusophycus biloba, Scolicia prisca and Skolithos linearis. The trace fossil assemblage fits the Cruziana and Zoophycosichnofacies and allows inferring a marine paleoenvironment ranging from shallow continental shelf waters to tidal flats with low energy.

Key words: ichnofossils, Protovirgularia, Pimenteira Formation, Devonian.

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Published

2013-07-30

Issue

Vol. 8 No. 1 (2012): jan/jun

Section

Artigos

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