Distinctive Silurian chitinozoans from the Itacurubí Group (Vargas Peña Shale), Chaco Basin, Paraguay

Wood, Gordon D.; Miller, Merrell A.

doi:10.1080/01916122.1991.9989394

Cited by 24 publications

(7 citation statements)

References 10 publications

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“…Tais datações permitem a correlação lito, bio e cronoestratigráfica entre a Formação Vila Maria e a Formação Vargas Pena do Grupo Itacurubi, aflorante no Paraguai e posicionada no Llandoveriano Inferior/Médio por Wood & Miller (1991) e Gray et al (1992).…”

Section: Sequências Tectono-sedimentaresunclassified

Sequências Tectono-Sedimentares Mesopaleozóicas Da Bacia Do Paraná, Sul Do Brasil

Assine¹,

SOARES²,

MILANI³

1994

RBG

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Section: Sequências Tectono-sedimentaresunclassified

Sequências Tectono-Sedimentares Mesopaleozóicas Da Bacia Do Paraná, Sul Do Brasil

Assine¹,

SOARES²,

MILANI³

1994

RBG

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“…2008; Alfaro et al . 2010), organic‐walled microfossils (Wood and Miller 1991; Gray et al . 1992; Grahn et al .…”

mentioning

confidence: 99%

High‐latitude Hirnantian (latest Ordovician) brachiopods from the Eusebio Ayala Formation of Paraguay, Paraná Basin

Benedetto

Halpern

Inchausti³

2013

Palaeontology

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Examination of newly collected brachiopods from the Eusebio Ayala Formation of Paraguay reveals the occurrence of Arenorthis paranaensis sp. nov., Plectothyrella? itacurubiensis sp. nov., Hindella sp. and Eostropheodonta conradii (Harrington). Associated graptolites of the N. persculptus Zone indicate that the age of the fossiliferous beds is Hirnantian. The overall generic composition of the fauna is similar to that of the atypical Hirnantia Fauna of the Bani Province. The record in Paraguay of Arenorthis, hitherto only known from North Africa, together with species of Plectothyrella? and Eostropheodonta different from those recorded in the Kosov Province, emphasizing the affinities between the Paraguayan fauna and the low-diversity African assemblages. Stratigraphic and faunal evidence indicates that biogeographical links between South America and Africa already existed by the end of the Ordovician when most of the intra-cratonic basins of Gondwana were flooded during the postglacial sea level rise.

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“…The phytoplankton assemblage present corresponds to the upper, but not the uppermost part, of Gray´s (1985) Microfossil Assemblage Zone I, which ranges from the Llanvirn (beneath the Didymograptus murchisoni graptolite Zone) to the mid-Telychian (Gray, 1989;Gray et al, 1992). No detailed biostratigraphic study of the acritarchs (Gray et al, 1985;Wood & Miller, 1991) have been made, but the acritarchs from the Vila Maria Formation display Aeronian elements (cf. Le Hérissé et al, 1995Hérissé et al, , 2001Molyneux et al, 1996).…”

Section: Discussionmentioning

confidence: 99%

“…These shales were later formally named the Vargas Peña Shale by Wolfart (1961) and, based on the presence of Climacograptus, they were assigned an Early Silurian age. The Vargas Peña clay pit was chosen as a type locality (Harrington, 1972;Wood & Miller, 1991). Shales in the same stratigraphic position in southern Brazil were defined as the Vila Maria Formation by Andrade and Camarço (1980).…”

Section: Introductionmentioning

confidence: 99%

“…The present study is the first attempt to correlate the Silurian chitinozoans from the 1-SE-1-SC well with those from the better known Vargas Peña Formation in eastern Paraguay (Milani & Daemon, 1992;Milani et al, 1995;Grahn et al, 2000;Mendlowicz Mauller et al, 2004) and other contemporaneous strata in Brazil. Comprehensive reviews of the Vila Maria Formation can be found in Grahn (1992), Pereira (1998), and Grahn et al (2000), and for the Vargas Peña Formation in Wood & Miller (1991) and Grahn et al (2000).…”

Section: Introductionmentioning

confidence: 99%

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Early Silurian chitinozoans in the Apucarana Sub-Basin (Paraná Basin), south Brazil, and their biostratigraphic provenance

Grahn¹

2005

RBP

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Early Silurian chitinozoans recovered from cuttings samples of pre-Silurian units of the PETROBRAS 1-SE-1-SC well, near Seara in the State of Santa Catarina, southern Brazil, are compared with those from shales in the lower part of the Vargas Peña Formation at Minas Cué and the Asunción-1 well, eastern Paraguay. The obviously caved assemblages show a pronounced similarity with chitinozoan faunas belonging to the regional Spinachitina wolfarti-Plectochitina sp. A Subzone (Conochitina elongata Zone) of early Aeronian (early middle Llandovery) age. Because of down hole contamination, a stratigraphic provenance from the early Aeronian Vila Maria Formation is proposed.

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Distinctive Silurian chitinozoans from the Itacurubí Group (Vargas Peña Shale), Chaco Basin, Paraguay

Cited by 24 publications

References 10 publications

Sequências Tectono-Sedimentares Mesopaleozóicas Da Bacia Do Paraná, Sul Do Brasil

Sequências Tectono-Sedimentares Mesopaleozóicas Da Bacia Do Paraná, Sul Do Brasil

High‐latitude Hirnantian (latest Ordovician) brachiopods from the Eusebio Ayala Formation of Paraguay, Paraná Basin

Early Silurian chitinozoans in the Apucarana Sub-Basin (Paraná Basin), south Brazil, and their biostratigraphic provenance

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