Silurian of Brazil

Lange, Frederico W.

doi:10.1130/spe133-p33

Cited by 5 publications

(2 citation statements)

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“…1991); environmental interpretation of their depositional environments is similar to that of the Vargas Pena. Lange (1972) concluded that the Ttaim Formation should be assigned to the Serra Grande Formation. He (Brito, 1967, p. 480) regarded his Palynological Zones S and T as ' together the equivalent of the Itaim Formation'.…”

Section: A Parana Basin Southern Brazilmentioning

confidence: 99%

A new record of early Silurian land plant spores from the Paraná Basin, Paraguay (Malvinokaffric Realm)

et al. 1992

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The first conclusive evidence for Silurian rocks in the Parana Basin, Brazil, was reported in 1985. This evidence was based on organic-walled microfossils, principally spore tetrads, and associated phytoplankton (' acritarchs' and prasinophytes), the first recovered from the Vila Maria Formation on the northeastern rim of the Basin. The spore assemblage was typical of Gray's Microfossil Assemblage Zone I; size-frequency data for the tetrads suggested an early Silurian (early Llandovery; Rhuddanian) age. We now document a new MA Zone I occurrence of spore tetrads together with a few single trilete spores, from the southwestern rim of the Parana Basin, Paraguay. The single spores are among the earliest known to have normally dissociated from a tetrahedral tetrad. Size-frequency data for the tetrads suggest a late Llandovery, pre-C 5 (mid-Telychian) age. These spores, together with phytoplankton and chitinozoans, were recovered from beds laterally equivalent to the Vargas Pena Shale at the type locality from which Llandovery diplograptids and monograptids are known. Llandovery age rocks on the southwestern and northeastern borders of the Parana Basin, c. 1400 km apart, suggest that early Silurian rocks were extensively distributed throughout southern Brazil and adjacent Paraguay. Close conformity between the age reference obtained with graptolites and spore tetrads again demonstrates the stratigraphic utility of early Silurian spores in providing reliable age determinations for otherwise unfossiliferous rocks. Spore tetrad assemblages available from the Malvinokaffric Realm (South America, Africa, Arabia) represent a distinct phytogeographic unit contrasted with spore tetrad assemblages from the North Silurian Realm of North America and parts of Europe.

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Section: A Parana Basin Southern Brazilmentioning

confidence: 99%

A new record of early Silurian land plant spores from the Paraná Basin, Paraguay (Malvinokaffric Realm)

et al. 1992

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“…Discussion.-This form differs from Decept,rix (Praenucula) pulchella (Clarke, 1899), in being more equilateral and in having a shorter anterior tooth row. D. pulchella is from the Trombetas Formation of Brazil, which according to Lange (1972) is early Llandoverian in age and thus probably older than the Pampa Shale collection from Huari.…”

Section: Notedmentioning

confidence: 95%

Silurian-Devonian pelecypods and Paleozoic stratigraphy of subsurface rocks in Florida and Georgia and related Silurian pelecypods from Bolivia and Turkey

Pojeta¹,

Kříž²,

Berdan³

1976

Professional Paper

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The subsurface sedimentary Paleozoic rocks beneath northern Florida and adjacent parts of Georgia and Alabama comprise a .sequence of quarlzitic sandstones and micaceous shales, dark-gray shales, and red and gray siltstones ranging in age from Early Ordovician to Middle Devonian. The Silurian-Devonian pelecypod faunas from four wells (three of which, the Ragland, Cone, and Tillis wells, are in Florida, and one of which, the Chandler, is in Georgia) are described and illustrated. Also described are Silurian pelecypods from one locality in Bolivia and one in Turkey. Biostratigraphically, the faunas from the American wells range in age from Wenlockian or Ludlovian (Silurian) to Middle Devonian; the Bolivian specimens are probably Ludlovian (Late Silurian); and the Turkish specimens are probably Wenlockian or Ludlovian (Silurian). Paleoecologically, the strata in the American wel1s represent shallowwater normal marine environments, and all pelecypods known from them belong to one of three life-habit groups-'byssally attached, burrowing, or reclining. The Bol,ivian and Turkish pelecypods likewise belong only to these three life-habit groups. Analysis of the geograpMc distribution of the Florida Paleozoic pelecypod genera shows that they are closest to the forms found in central Bohemia and Poland; elements of this fauna also occur in Nova Scotia, North Mrica, and South America.

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Regional and Global Correlation of the Latest Ordovician to Early Silurian Shale Gas-Bearing Strata

Chen,

Zhang

et al. 2023

Latest Ordovician to Early Silurian Shale Gas Strata of the Yangtze Region, China

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Silurian of Brazil

Cited by 5 publications

References 0 publications

A new record of early Silurian land plant spores from the Paraná Basin, Paraguay (Malvinokaffric Realm)

A new record of early Silurian land plant spores from the Paraná Basin, Paraguay (Malvinokaffric Realm)

Silurian-Devonian pelecypods and Paleozoic stratigraphy of subsurface rocks in Florida and Georgia and related Silurian pelecypods from Bolivia and Turkey

Regional and Global Correlation of the Latest Ordovician to Early Silurian Shale Gas-Bearing Strata

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