Absolute Dating of Permian Ash-Fall in the Rio Bonito Formation, Paraná Basin, Brazil

Matos, Sérgio Luís Fabris de; Yamamoto, Jorge Kazuo; Riccomini, Claudio; Hachiro, Jorge; Tassinari, Colombo Celso Gaeta

doi:10.1016/s1342-937x(05)70341-5

Cited by 62 publications

(38 citation statements)

References 10 publications

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“…Considering that there is no considerable diachronism between these two lithostratigraphical units, the Irati Formation should be regarded as older than 270 My. This dating disagrees with those established by Melchor (2000) and Matos et al (2001) that come from stratigraphically lower sections.…”

Section: Agecontrasting

confidence: 93%

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Progress on the palynostratigraphy of the Permian strata in Rio Grande do Sul State, Paraná Basin, Brazil

Souza

Marques-Toigo²

2005

An. Acad. Bras. Ciênc.

115

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A review of published papers and results of analysis of new material have allowed improvements on the palynostratigraphy of the Permian strata of the Paraná Basin in Rio Grande do Sul State. Based on first and last occurrences of certain species of pollen taxa, two palynozones are formalized, these are the Vittatina costabilis and Lueckisporites virkkiae Interval Zones, in ascending order. The Vittatina costabilis Interval Zone is subdivided into two units, in ascending order the Protohaploxypinus goraiensis and the Hamiapollenites karrooensis Subzones, and is recognized from the glacial (Itararé Group) and post-glacial sequence (Rio Bonito Formation and the base of the Palermo Formation). The Lueckisporites virkkiae Interval Zone occurs from the uppermost Rio Bonito Formation, through the Palermo and Irati formations, and into the Serra Alta and Teresina formations. The main characteristics and reference sections are established, as well as additional criteria to recognize biostratigraphical units, in accordance with the International Stratigraphic Guide. Palynostratigraphical correlation suggests that the Vittatina costabilis Zone concerns the Early Permian (early Cisuralian), while the Lueckisporites virkkiae is regarded as late Early Permian to early Middle Permian (late Cisularian to early Guadalupian).

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Section: Agecontrasting

confidence: 93%

“…Matos et al (2001) An absolute age of 270 My was obtained from tuff beds of the Collingham Formation, in Namibia (Stollhofen et al 2000). This unit overlies the Whitehill Formation, which is correlated to the Irati Formation (Faure and Cole 1999), in Paraná Basin, and is related to the Lueckisporites virkkiae Interval Zone.…”

Section: Agementioning

confidence: 99%

Progress on the palynostratigraphy of the Permian strata in Rio Grande do Sul State, Paraná Basin, Brazil

Souza

Marques-Toigo²

2005

An. Acad. Bras. Ciênc.

115

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“…Therefore, it is important to highlight the evidence of volcanic activity recorded for the south Brazilian coal-bearing strata, mainly in the Candiota and Faxinal coalfields (Formoso et al, 1999;Matos et al, 2001;Cazzulo-Klepzig et al, 2005;Guerra-Sommer et al, 2008a,b,c;Simas, 2008;Simas et al, 2009). The volcanic rocks, identified as tonsteins, are represented by discrete and continuous horizons of clay beds interbedded within different coal seams.…”

Section: P R O V a Smentioning

confidence: 99%

Effect of volcanic ash-fall on a Permian peat-forming environment, on the basis of palynology, palynofacies and paleobotany (Faxinal Coalfield, Brazil)

Cazzulo-Klepzig¹,

Filho²,

Guerra-Sommer³

et al. 2009

Rev. bras. paleont.

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-The aim of this paper was to assess, in a study case, whether ash-fall deposition influenced the character of the peat-forming vegetation in some coal beds in the southernmost Paraná Basin in Brazil, taking into consideration that records of tonstein levels are common in some coal bearing-strata. An investigation was made of the uppermost Faxinal coal seam (Coal Seam S), which displays two adjacent coal beds interbedded with a tonstein level. On the basis of the botanical affinity between the miospores and the parent plants as well as the relative abundance of the different plant groups, each coal plant assemblage was determined. Furthermore, previous paleobotanical data obtained on the tonstein level that identified a compressed Glossopteris flora were incorporated in the study. Palynofacies analyses performed on both coal and tonstein levels demonstrated good results for the recognition of preserved organic matter and changes in paleoenvironmental conditions along the coal sequence. The effect of volcanic ash-fall deposition was reflected by changes in the character of the vegetation associated with coal layers below and above the tonstein. Palynofacies results corroborated palynological and paleobotanical interpretation and contributed to the establishment of the floral succession deposited over a short time interval, under the effect of volcanic ash-fall deposition.Key words: palynology, paleobotany, palynofacies, coal, tonstein, Paraná Basin.RESUMO -O trabalho objetivou avaliar o efeito da deposição de cinza vulcânica sobre o caráter da vegetação responsável pela formação de alguns carvões na jazida do Faxinal, levando em consideração que registros de tonstein são comuns em sequências de carvão na porção sul da bacia do Paraná, no Brasil. Em estudo de caso, foi analisada a camada de carvão superior (Camada S) que apresenta, na sua porção mais superior, dois leitos adjacentes de carvão intercalados por um nível de tonstein originado de cinza vulcânica. A composição das palinofloras foi determinada com base na afinidade dos esporos e dos grãos de pólen e na relação de freqüência dos diferentes grupos vegetais. Dados paleobotânicos anteriores desenvolvidos nesse nível de tonstein, que demonstraram a presença de uma importante Flora Glossopteris, foram incorporados ao trabalho aqui proposto. As análises de palinofácies produziram resultados significativos para o reconhecimento da matéria

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“…The lithostratigraphic section (of upper Gondwana I Supersequence) is modified from Zalán et al (1991). The absolute dating in Interpretation I is taken from Coutinho and Hachiro (2005;R 1 ) and Matos et al (2001;R 2 ); the Teresina Formation may be Middle-Late Permian in age. Interpretation II: the absolute dating is taken from Santos et al (2006;R 3 ) and the lithostratigraphic chart is schematized from Souza (2006); the Teresina Formation may be latest Early Permian or Middle Permian in age.…”

Section: Introductionmentioning

confidence: 99%

“…Until recently, there was only one absolute U/Pb age available-for the Tubarão Group of the State of Rio Grande do Sul, which is 267.1 AE 3.4 Ma (Guadalupian) from a tonstein interbedded in a coal seam (see Matos et al 2001) of the Rio Bonito Formation (Figure 3; R 2 ), and this fact rendered the overlying formations Guadalupian or younger in age (Middle Permian according to Wardlaw et al [2004, p. 254; see also Souza and Marques-Toigo 2005). Coutinho and Hachiro (2005) suggested a Late Permian age for the Passa Dois Group on the basis of the above mentioned date for the Rio Bonito Formation and their radiometric dating of the Iratí Formation (unpublished data in Figure 3: Interpretation I, R 1 -but only an approximate age is given).…”

Section: Introductionmentioning

confidence: 99%

Acanthodian remains from the Middle‐Late Permian of Brazil

Mutter

Richter

2007

Geological Journal

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Acanthodian fishes have been recorded from Silurian through to Permian rocks. Bone beds in the Teresina Formation of the Passa Dois Group (Paraná Basin) in São Gabriel, State of Rio Grande do Sul (southern Brazil) have yielded acanthodian scales and fin spine fragments and are preserved in association with shark and lower actinopterygian fish scales and teeth and possible shark fin spines. All fish remains are disarticulated and preservation is often fragmentary. However, there is no geological or palaeontological evidence that the materials in these bone beds, of Middle‐Late Permian age, could have been re‐worked from older strata. We therefore interpret these bone beds and the acanthodian remains as the youngest known record of acanthodians worldwide. The presence of acanthodians in the Passa Dois Group enhances the significance of the Middle‐Upper Permian rocks of the Paraná Basin in South America in interregional correlation, and may contribute to the discussion of the allegedly global mass extinction event at the end of the Palaeozoic era. Copyright © 2007 John Wiley & Sons, Ltd.

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Absolute Dating of Permian Ash-Fall in the Rio Bonito Formation, Paraná Basin, Brazil

Cited by 62 publications

References 10 publications

Progress on the palynostratigraphy of the Permian strata in Rio Grande do Sul State, Paraná Basin, Brazil

Progress on the palynostratigraphy of the Permian strata in Rio Grande do Sul State, Paraná Basin, Brazil

Effect of volcanic ash-fall on a Permian peat-forming environment, on the basis of palynology, palynofacies and paleobotany (Faxinal Coalfield, Brazil)

Acanthodian remains from the Middle‐Late Permian of Brazil

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