Micropaleontology of the Reef Facies of the Pirabas Formation (Lower Miocene), Pará State, Brazil

Vladimir de Araújo Távora, Bruna Leal Passos de Souza, Ignácio de Loiola Alvares Nogueira Neto

Abstract


This work presents the resulting data from microfossils analysis of the Pirabas Formation reef lithofacies, exposed in the Maçarico beach, Salinópolis city, Pará State, Brazil. The specific diversity and abundance indicates reef environment developed in warm and shallow waters with high energy and high availability of calcium carbonate. The microfossils also suggest low to moderate sedimentation rate and variable substrate composition. The intense diagenesis appears to have dissolved many specimens but the strucuture of the primary orictocoenosis was preserved.

Keywords


Pirabas Formation; Fossil reef; Microfossils.



DOI: https://doi.org/10.11137/2014_2_100_110

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ISSN 0101-9759 e-ISSN 1982-3908