Distribuição Paleogeográfica E Biocronológica Dos Titanossauros (Saurischia, Sauropoda) Do Grupo Bauru, Cretáceo Superior Do Sudeste Brasileiro

Santucci, Rodrigo; Bertini, Reinaldo J.

doi:10.25249/0375-7536.2001313307314

Cited by 80 publications

(74 citation statements)

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“…The oucrops belong to the Adamantina Formation, Bauru Group, northwestern part of the Bauru Basin, possibly of Campanian to Maastrichtian age (Santucci & Bertini, 2001;Pires-Domingues, 2005).…”

Section: Horizon and Localitymentioning

confidence: 99%

A new species of Baurusuchus (Crocodyliformes, Mesoeucrocodylia) from the Upper Cretaceous of Brazil, with the first complete postcranial skeleton described for the family Baurusuchidae

Nascimento¹,

Zaher²

2010

Pap. Avulsos Zool. (São Paulo)

166

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Section: Horizon and Localitymentioning

confidence: 99%

A new species of Baurusuchus (Crocodyliformes, Mesoeucrocodylia) from the Upper Cretaceous of Brazil, with the first complete postcranial skeleton described for the family Baurusuchidae

Nascimento¹,

Zaher²

2010

Pap. Avulsos Zool. (São Paulo)

166

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“…Figure 2. A chronostratigraphic chart of the eastern portion of the Bauru Basin, based on Amaral et al 1967 (CSN sample); Hasui & Cordani 1968 (samples AX, C-3, S-10, S-31, A-C2-4, OB-SN, SB, S-1, P, T-2, B-1); Sonoki & Garda 1988 (samples CT, CS, CCI); Machado Junior 1992 (sample CCII); Guimarães et al 2012 andFragoso et al 2013 (Pterosaurs); Gobbo-Rodrigues 2001 andDias-Brito et al 2001 (Ostracods); Santucci &Bertini 2001 andMartinelli et al 2011 (Allosaurus) (Batezelli 2015).…”

Section: Field Descriptionsmentioning

confidence: 99%

The mineralogy of paleosols in the Marília Formation and their importance in the environmental evolution of the Maastrichtian of the Bauru Basin in southeastern Brazil

2017

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Soils and paleosols reflect the complex interplay between sedimentation, erosion and non-deposition. An analysis of the mineralogical components of paleosols is critical for the reconstitution of the factors, processes and environments in which they were formed. The recognition of mineralogical assemblages can reveal the environmental conditions during pedogenesis and through quantitative analysis it is possible to identify a vertical variation in mineral concentration or leaching over the paleosol profiles, indirectly pointing to environmental processes that dominated during the pedogenetic evolution. The objective of this study is to discuss the significance of mineral phases and to quantify the environmental evolution and degree of development of paleosols of the Marília Formation, Maastrichtian of Bauru Basin. Three sections have been described (A1, A2, A3) in the Marília Formation. The mineralogy was determined by x-ray diffraction, and mineral quantification was obtained through the Rietveld refinement method. The calcretes of the Marília Formation are pedogenic, mostly authigenic minerals. The variation of quartz, calcite, palygorskite and smectite, the micromorphology, and the diversity of subsurface horizons (Bkm, Btkm, Bt) indicate that the studied paleosols did develop in semi-arid conditions, with episodes of higher rainfall rates, humidity, leaching and desilication. KEYWORDS:Calcrete; Paleoclimate; Palygorskite; Pedogenesis; Upper Cretaceous. RESUMO: Solos e paleossolos refletem complexa inter-relação entre sedimentação, erosão e não-deposição. A análise dos constituintes mineralógi-cos de paleossolos é fundamental para a reconstituição dos fatores, processos e ambientes no qual esses se formaram. O reconhecimento de determinadas assembléias mineralógicas podem revelar as condições ambientais durante a pedogênese e através da análise quantitativa se torna possível constatar variação vertical ao longo dos perfis de paleossolos, identificando

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“…Carbonate cementation might occur, as well as carbonate nodules. Macrofossils are common (Santucci & Bertini 2001), as well as bioturbation (Fig. 2B), cross bedding (Fig.…”

Section: Bauru Group and Uberaba Formationmentioning

confidence: 99%

“…Soares et al (1980), based on paleontological and stratigraphic studies, suggest that the Bauru Group was deposited in the Aptian-Maastrichtian interval, as also proposed by Bertini (1993). The Uberaba Formation is considered as deposited in the Campanian (83.6 to 72.1 Ma), based on lithostratigraphic relationships with the Vale do Rio do Peixe and Marília formations, in addition to paleontological data (Huene 1939, Santucci & Bertini 2001) and paleomagnetic studies of Tamrat et al (2002).…”

Section: Bauru Group and Uberaba Formationmentioning

confidence: 99%

Geochemistry and sedimentary provenance of the Upper Cretaceous Uberaba Formation (Southeastern Triângulo Mineiro, MG, Brazil)

et al. 2017

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RESUMO: A Formação Uberaba, de idade campaniana e ocorrência restrita à região da cidade homônima, é composta de arenitos líticos e conglomerados de cor esverdeada, com possível contribuição vulcanoclástica. Nessa unidade ocorrem minerais pesados como ilmenita ABSTRACT:The campanian Uberaba Formation, which crops out around the homonymous town, is composed of greenish lithic sandstones and conglomerates with possible volcanoclastic contribution. In this unit, heavy minerals such as ilmenite, garnet, perovskite and magnetite, besides clinopyroxene, plagioclase, quartz, calcite and apatite, are found. The Uberaba Formation geochemistry is marked by high grades of Ba, Ta, La, Nb and Th, with flat (no Eu anomaly) and highly fractionated (La N /Yb N = ca. 128) chondrite-normalized rare earth elements. Mineral chemistry analyses of detrital garnets from the Uberaba Formation indicate the predominance of chorlomite with an affinity to crustal garnets (G3). The sedimentary provenance of the Uberaba Formation corresponds to a mixing of materials from the alkaline districts of the Alto Paranaíba and from the erosion of the Serra Geral Formation and the Canastra and Araxá groups. Diamond-producing conglomerates which crop out nearby, in Romaria, were considered by some authors as correlated to the Uberaba Formation. However, the composition of garnets recovered from those conglomerates is different, plotting in the field of mantle garnets (G9/G10). We consider, then, that those units are not correlated, and that the Uberaba Formation is not a possible source for the alluvial diamonds found in the homonymous river.

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Distribuição Paleogeográfica E Biocronológica Dos Titanossauros (Saurischia, Sauropoda) Do Grupo Bauru, Cretáceo Superior Do Sudeste Brasileiro

Cited by 80 publications

References 0 publications

A new species of Baurusuchus (Crocodyliformes, Mesoeucrocodylia) from the Upper Cretaceous of Brazil, with the first complete postcranial skeleton described for the family Baurusuchidae

A new species of Baurusuchus (Crocodyliformes, Mesoeucrocodylia) from the Upper Cretaceous of Brazil, with the first complete postcranial skeleton described for the family Baurusuchidae

The mineralogy of paleosols in the Marília Formation and their importance in the environmental evolution of the Maastrichtian of the Bauru Basin in southeastern Brazil

Geochemistry and sedimentary provenance of the Upper Cretaceous Uberaba Formation (Southeastern Triângulo Mineiro, MG, Brazil)

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