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

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dc.contributor.authorSallun Filho, William
dc.contributor.authorGhilardi, Renato Pirani [UNESP]
dc.contributor.authorSilva e Silva, Loreine Hermida
dc.contributor.authorHachiro, Jorge
dc.contributor.institutionSecretaria Meio Ambiente Estado São Paulo
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal do Rio de Janeiro (UFRJ)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-20T13:25:50Z
dc.date.available2014-05-20T13:25:50Z
dc.date.issued2012-01-01
dc.description.abstractSilicified stromatolites have been described in the Permian Teresina Formation, Passa Dois Group, of the Parana Basin. These stromatolites occur as blocks in the Fazenda Monte Alegre area at the headwaters of the creek known as Corrego 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.en
dc.description.affiliationSecretaria Meio Ambiente Estado São Paulo, Inst Geol, BR-04301903 São Paulo, Brazil
dc.description.affiliationUNESP Bauru, Fac Ciencias, Dept Ciencias Biol, BR-17033360 Bauru, SP, Brazil
dc.description.affiliationUniv Fed Rio de Janeiro, BR-22290240 Rio de Janeiro, RJ, Brazil
dc.description.affiliationUniv São Paulo, Inst Geociencias, BR-05508080 São Paulo, Brazil
dc.description.affiliationUnespUNESP Bauru, Fac Ciencias, Dept Ciencias Biol, BR-17033360 Bauru, SP, Brazil
dc.format.extent16
dc.identifier.citationPalaeontologia Electronica. Amherst: Coquina Press, v. 15, n. 1, p. 16, 2012.
dc.identifier.issn1935-3952
dc.identifier.lattes3868502906886933
dc.identifier.orcid0000-0003-0410-8011
dc.identifier.urihttp://hdl.handle.net/11449/8221
dc.identifier.wosWOS:000310217300003
dc.language.isoeng
dc.publisherCoquina Press
dc.relation.ispartofPalaeontologia Electronica
dc.relation.ispartofjcr1.410
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectStromatoliteen
dc.subjectCoquina beden
dc.subjectPermianen
dc.subjectParana Basinen
dc.subjectTeresina Formationen
dc.subjectBrazilen
dc.titlePermian stromatolites associated with bivalve coquina beds-Angatuba, SP, Brazil (Teresina Formation, Parana Basin)en
dc.typeArtigo
dcterms.rightsHolderCoquina Press
unesp.author.lattes3868502906886933[2]
unesp.author.orcid0000-0003-0410-8011[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências, Baurupt
unesp.departmentCiências Biológicas - FCpt

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