New aspects of Neoproterozoic-Cambrian transition in the Corumbá region (state of Mato Grosso do Sul, Brazil)

Walde, Detlef Hans-Gert; Carmo, Dermeval Aparecido do; Guimarães, Edi Mendes; Vieira, Lucieth Cruz; Erdtmann, Bernd-Dietrich; Sanchez, Evelyn Aparecida Mecenero; Adôrno, Rodrigo Rodrigues; Tobias, T.C.

doi:10.1016/j.annpal.2015.07.002

Cited by 36 publications

(20 citation statements)

References 32 publications

(70 reference statements)

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“…Although correlation of the lower part of the Cambrian remains controversial [ 49 , 50 ], the advent of relatively high-precision chemostratigraphy and improved biostratigraphic information has yielded a somewhat clearer picture of the diversification that took place in basal Cambrian times ( figure 5 ) [ 53 ]. Rather surprisingly to the non-specialist, the basal parts of the Cambrian show rather sparse diversity, dominated by an assemblage of tubes (of uncertain affinities), notably Anabarites , and a moderately diverse trace fossil assemblage.…”

Section: Cambrian Worlds: the Sequence Of Faunal Change In The Cambrimentioning

confidence: 99%

Ecological innovations in the Cambrian and the origins of the crown group phyla

Budd¹,

Jackson²

2016

Phil. Trans. R. Soc. B

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Simulation studies of the early origins of the modern phyla in the fossil record, and the rapid diversification that led to them, show that these are inevitable outcomes of rapid and long-lasting radiations. Recent advances in Cambrian stratigraphy have revealed a more precise picture of the early bilaterian radiation taking place during the earliest Terreneuvian Series, although several ambiguities remain. The early period is dominated by various tubes and a moderately diverse trace fossil record, with the classical ‘Tommotian’ small shelly biota beginning to appear some millions of years after the base of the Cambrian at ca 541 Ma. The body fossil record of the earliest period contains a few representatives of known groups, but most of the record is of uncertain affinity. Early trace fossils can be assigned to ecdysozoans, but deuterostome and even spiralian trace and body fossils are less clearly represented. One way of explaining the relative lack of clear spiralian fossils until about 536 Ma is to assign the various lowest Cambrian tubes to various stem-group lophotrochozoans, with the implication that the groundplan of the lophotrochozoans included a U-shaped gut and a sessile habit. The implication of this view would be that the vagrant lifestyle of annelids, nemerteans and molluscs would be independently derived from such a sessile ancestor, with potentially important implications for the homology of their sensory and nervous systems.

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Section: Cambrian Worlds: the Sequence Of Faunal Change In The Cambrimentioning

confidence: 99%

Ecological innovations in the Cambrian and the origins of the crown group phyla

Budd¹,

Jackson²

2016

Phil. Trans. R. Soc. B

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“…The formation of Paraguay Belt starts at the end of the Brasiliano Orogeny (De Alvarenga et al, 2009), associated to western Gondwana amalgamation (Campanha et al, 2011). Walde et al, (2015), proposes the Corumbá Graben System, located above a hot-spot related to a triple junction (Brito Neves et al 1985, Jones 1985 of two provinces denominated Bolivian-Chiquitos Tucavaca and Paraguay Fold Belt. Almeida (1968), proposes three structural stages for the Belt evolution, the first represented by the intensively folded green schists from Cuiaba Group, a second stage composed by diamictites of the Puga Formation underlying the Corumbá Group.…”

Section: The Paraguay Beltmentioning

confidence: 99%

“…The Tamengo Formation have been studied before on some classical outcrops: Corcal Mine, Sobramil Port and Laginha Mine Sections at Corumbá and Serra da Bodoquena regions (Boggiani et al, 2010;Campanha et al, 2011;Spangenberg et al, 2014;Walde et al, 2015). However, high-resolution chemostratigraphic profiles do not exist.…”

Section: Introductionmentioning

confidence: 99%

C and O Isotopes of the middle and upper Tamengo Formation (Corumbá Group - Upper Ediacaran): effects of the sedimentary facies and diagenesis

Rivera¹,

Carolina²

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Leme. To the project members Kamilla, Gustavo, Sergio, Gabriel, Cléber, Jhon and Juan, for the constructive advises and willingness to help anytime. To the Coordenação de aperfeiçoamento de pessoal de Nível Superior (CAPES) for the conferred scolarship. My grateful extended to all the members and technicians of the Sistemas Cársticos, Isótopos Estáveis, and Petrografia Sedimentar laboratories where the analysis were carried out and also, to all the staff of the IGC/USP. My deep gratitude to my besties: Maria Fernanda for the support, countless advices, for always be there even at the worst ideas, Julisa for understand, hear and always wish the best for me, and Martin for the technical advises and share my worries, for the friendship without boundaries. To my friends, Ximena, Santiago and Rodrigo, for the company and unconditional support. Finally, my heartfelt thanks to my mom Hilda "loyal friend my guardian angel in the sky" to my dad Luis Alfonso for his constant support and example. To My brothers William for giving me strength and helping me and Diego for supporting my constant grumbling and being my accomplice in everything I do. To my nieces and nephew Ana María, María Alejandra, Juan Felipe and María Lucía, for understand, for the unconditional love, this is also for you. Thanks to everyone that help me get here, without you this would not have been possible!

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“…Neoproterozoic stratigraphic column of the Corumbá region, Mato Grosso do Sul State, Brazil (modified afterWalde et al, 2015).…”

mentioning

confidence: 99%