Permian stromatolites associated with bivalve coquina beds-Angatuba, SP, Brazil (Teresina Formation, Paraná Basin)

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dc.contributor.authorFilho, William Sallun
dc.contributor.authorGhilardi, Renato Pirani [UNESP]
dc.contributor.authore Silva, Loreine Hermida Silva
dc.contributor.authorHachiro, Jorge
dc.contributor.institutionSecretaria do Meio Ambiente do Estado de São Paulo
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade Federal do Estado do Rio de Janeiro
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2022-04-29T07:11:51Z
dc.date.available2022-04-29T07:11:51Z
dc.date.issued2012-12-01
dc.description.abstractSilicified stromatolites have been described in the Permian Teresina Formation, Passa Dois Group, of the Paraná Basin. These stromatolites occur as blocks in the Fazenda Monte Alegre area at the headwaters of the creek known as Córrego Catanduva in the municipality of Angatuba. These blocks originate from the Serra de Angatuba region and were recognized in a road that was cut in the midst of sandstones and siltites. The stromatolites are isolated bioherms that are domed to subspherical with a flat base in profile and a rounded to lenticular shape in plan view. The stromatolites exhibit a reddish coloration and are composed of microcrystalline quartz. Lamination is continuous, non-columnar, and anastomosed, showing parallel to divergent growth; however, divergent columns also occur, especially at the tops of the bioherms. The lamination is fine and well preserved, with alternating light and dark laminas. Microfossils of filamentous cyanobacteria are preserved and were related to the genera Microcoleus and Rivularia. Silicified bivalves occur in association with the stromatolites and are preserved in the form of coquina beds and rare isolated specimens within the bioherms. The described specimens belong to the Pinzonella illusa biozone, with representatives of the species Pinzonella illusa, Angatubia cowperesioides, and Houldausiella elongata. The formation environment of these stromatolites is associated with tidal plains of shallow, brackish, relatively calm, warm waters of good luminosity with the presence of weak currents. There was likely a low level of predation, and the environment may have been hypersaline. The coquina beds associated with the stromatolites indicate a probable proximal tempestite, i.e., they were formed near the coastline. The stromatolites were originally composed of carbonates, although these were replaced by silica during early diagenesis. © Palaeontological Association March 2012.en
dc.description.affiliationInstituto Geológico Secretaria do Meio Ambiente do Estado de São Paulo, Av. Miguel Stéfano, 3900, 04301-903, São Paulo, SP
dc.description.affiliationDepartamento de Ciências Biológicas UNESP-Bauru, Av. Eng. Luiz Edmundo Carrijo Coube, s/n, 17033-360, Bauru, SP
dc.description.affiliationUniversidade Federal do Estado do Rio de Janeiro, Av. Pasteur 458, Bloco III, 22290-240, Rio de Janeiro, RJ
dc.description.affiliationInstituto de Geociências Universidade de São Paulo, Rua do Lago, 562, 05508-080, São Paulo, SP
dc.description.affiliationUnespDepartamento de Ciências Biológicas UNESP-Bauru, Av. Eng. Luiz Edmundo Carrijo Coube, s/n, 17033-360, Bauru, SP
dc.identifier.citationPalaeontologia Electronica, v. 15, n. 1, 2012.
dc.identifier.issn1094-8074
dc.identifier.scopus2-s2.0-84879179565
dc.identifier.urihttp://hdl.handle.net/11449/227181
dc.language.isoeng
dc.relation.ispartofPalaeontologia Electronica
dc.sourceScopus
dc.subjectBrazil
dc.subjectCoquina bed
dc.subjectParaná Basin
dc.subjectPermian
dc.subjectStromatolite
dc.subjectTeresina Formation
dc.titlePermian stromatolites associated with bivalve coquina beds-Angatuba, SP, Brazil (Teresina Formation, Paraná Basin)en
dc.typeArtigo
unesp.departmentCiências Biológicas - FCpt

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