Caracterização tafonômica e estratigráfica de Cloudina lucianoi (Beurlen &amp; Sommer, 1957) Zaine &amp; Faircild, 1985, no Grupo Corumbá, ediacarano do sudeste do Brasil

Meira, Felipe van Enck

doi:10.11606/d.44.2011.tde-28092012-153037

Cited by 4 publications

(5 citation statements)

References 35 publications

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“…The presence of low angle to parallel lamination (F5) and hummocky cross‐stratification (F6) provides evidence of reworking by combined oscillatory and unidirectional flow generated by storms (Dott & Bourgeois, 1982; Burchette & Wright, 1992; Demicco & Hardie, 1994; Dumas & Arnott, 2006). Shells of Cloudina with deformational features may be related to transport or compaction (Meira, 2011; Becker‐Kerber et al ., 2017). Thin layers composed of disrupted and flattened clasts of stromatolites (F6) suggest that the reworking of non (or poorly) lithified microbial mats was important (Batten et al ., 2004).…”

Section: Facies Analysismentioning

confidence: 99%

Sedimentary facies, fossil distribution and depositional setting of the late Ediacaran Tamengo Formation (Brazil)

et al. 2020

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Mixed carbonate-siliciclastic deposits of the Tamengo Formation (terminal Ediacaran), record the rise of calcifying metazoans and the origin of exoskeletons in animals. To explore the relationships between environmental setting and the first appearance of calcified metazoans and their ecology, this study presents detailed sedimentological and stratigraphic data of eight sections that capture the final stages of the Ediacaran (550 to 543 Ma). This study combines stratigraphic characterization with detailed facies descriptions and evaluates lateral heterogeneity and overall ramp sedimentation integrated with fossil distribution. The Tamengo Formation represents a storm-dominated ramp. The outer to mid-ramp is composed of very finegrained siliciclastic rocks containing Corumbella body fossils and thinbedded mudstone/wackestone containing Cloudina. The mid-inner ramp is dominated by wackestone/packstone with abundant Cloudina skeletal debris and ooid packstone/grainstone shoal deposits. Locally, fragments of Corumbella and Cloudina are found on the same horizon, which is a result of their high accumulation rate, resulting from the reworking and mixing of epifaunal organisms. In spite of taphonomic biases, the general distribution of Corumbella and Cloudina across the unit suggests that these organisms have been transported across ramp and/or probably show a differential response of fauna preservation. When compared to other occurrences worldwide, this dataset indicates an already complex ecosystem in the Ediacaran, where these early animals were capable of adapting to specific environmental niches.

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Section: Facies Analysismentioning

confidence: 99%

Sedimentary facies, fossil distribution and depositional setting of the late Ediacaran Tamengo Formation (Brazil)

et al. 2020

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“…Esses fósseis constituem possíveis vendobiontes, espongiários e cnidários, além de icnofós-seis, de um modo bem similar ao que já foi descrito para a biosfera ediacarana (Xiao e Laflamme, 2009). Estudos dessas assembleias de organismos de corpo mole correlacionados com os dados de metazoários capazes de realizar esqueletogênese, evidenciados no Grupo Corumbá (Meira, 2011;Pacheco et al, 2011c;Pacheco et al, 2011a) e no Paraguai (Warren et al, 2012) podem servir como subsí-dio na elucidação dos fatores que culminaram na extinção dos vendobiontes e dos grupos de animais sem precedentes modernos e das condições para o estabelecimento da fauna subsequente no Fanerozoico.…”

Section: Discosunclassified

O registro fossilífero de metazoários ediacaranos na América do Sul e suas implicações nos estudos sobre origem e complexificação da vida animal

Becker-Kerber

Rosa

Gabas

et al. 2013

Geol. USP, Sér. cient.

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“…Cloudina is known from practically all the quarries and major outcrops of the Tamengo Formation in the Corumbá área (Zaine & Fairchild 1987;Meira 2011) and has been reported from Uruguay and Argentina (Gaucher et al 2003(Gaucher et al , 2005 and, most recently, from Paraguay (Boggiani & Gaucher 2004;Warren et al 2011). Outside South America, it occurs in Namibia (Germs 1972), Oman (Conway Morris et al 1990), China (Conway Morris et al 1990;Bengtson & Zhao 1992), Canada (Hofmann & Mountjoy 2001), Nevada (Hagadorn & Waggoner 2000), Spain (Palacios 1989) and Russia (Kontorovich et al 2008).…”

Section: Metazoansmentioning

confidence: 99%

“…The genus Cloudina was created by Germs (1972) for small, straight to sinuous, tubular calcareous shelly fossils (up to 6.5 mm in diameter and 35 mm long), open at the apex and closed at the base, found in limestones of the late Neoproterozoic Nama Group, Namibia (Germs 1972; Grant 1990). Characteristic of Cloudina are its short, partly overlapping segments having the shape of open truncated cones (Germs 1972; Zaine & Fairchild 1987; Grant 1990; Chen et al 2008; Meira 2011) (Fig. 5(d) and (e)).…”

Section: Selected Brazilian Precambrian Fossils Of Special Interestmentioning

confidence: 99%

“…Within this context, the varied fossils in the Jacadigo and Corumbá groups comprise a practically unique assemblage within the Ediacaran period. Recent research (Meira 2011; Pacheco 2011; Pacheco et al 2011a; Warren et al . in press) and new studies will certainly broaden knowledge of the latter phases of eukaryotic evolution in the Ediacaran.…”

Section: Perspectivesmentioning

confidence: 99%

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Evolution of Precambrian life in the Brazilian geological record

Fairchild

Sanchez

Pacheco

et al. 2012

International Journal of Astrobiology

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AbstractPrecambrian rocks comprise nearly one-quarter of the surface of Brazil and range from Paleoarchean (ca. 3.6 Ga) to the latest Ediacaran (0.542 Ga) in age. Except for controversial phosphatized ‘embryo-like’ microfossils like those from the lower Ediacaran Doushantuo Formation, China and complex rangeomorphs, Brazilian research has revealed all major categories of Precambrian life forms described elsewhere – microbialites, biomarkers, silicified microfossils, palynomorphs, vase-shaped microfossils, macroalgae, metazoans, vendobionts and ichnofossils – but the paleobiological significance of this record has been little explored. At least four occurrences of these fossils offer promise for increased understanding of the following aspects of Precambrian biospheric evolution: (i) the relationship of microbialites in 2.1–2.4 Ga old carbonates of the Minas Supergroup in the Quadrilátero Ferrífero, Minas Gerais (the oldest Brazilian fossils) to the development of the early oxygenic atmosphere and penecontemporaneous global tectonic and climatic events; (ii) the evolutionary and biostratigraphic significance of Mesoproterozoic to Ediacaran organic-walled microfossils in central–western Brazil; (iii) diversity and paleoecological significance of vase-shaped heterotrophic protistan microfossils in the Urucum Formation (Jacadigo Group) and possibly the Bocaina Formation (Corumbá Group), of Mato Grosso do Sul; and (iv) insights into the record of skeletogenesis and paleoecology of latest Ediacaran metazoans as represented by the abundant organic carapaces ofCorumbellaand calcareous shells of the index fossilCloudina, of the Corumbá Group, Mato Grosso do Sul. Analysis of the Brazilian Precambrian fossil record thus holds great potential for augmenting paleobiological knowledge of this crucial period on Earth and for developing more robust hypotheses regarding possible origins and evolutionary pathways of biospheres on other planets.

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Caracterização tafonômica e estratigráfica de Cloudina lucianoi (Beurlen & Sommer, 1957) Zaine & Faircild, 1985, no Grupo Corumbá, ediacarano do sudeste do Brasil

Cited by 4 publications

References 35 publications

Sedimentary facies, fossil distribution and depositional setting of the late Ediacaran Tamengo Formation (Brazil)

Sedimentary facies, fossil distribution and depositional setting of the late Ediacaran Tamengo Formation (Brazil)

O registro fossilífero de metazoários ediacaranos na América do Sul e suas implicações nos estudos sobre origem e complexificação da vida animal

Evolution of Precambrian life in the Brazilian geological record

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