Maastrichtian
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Pterodactyloid pterosaur bones from Cretaceous deposits of the Antarctic Peninsula
Abstract Fossil vertebrates from Antarctica are considerably rare, hampering our understanding of the evolutionary history of the biota from that continent. For several austral summers, the PALEOANTAR project has been carrying out fieldwork in the Antarctic Peninsula in search for fossils, particularly Cretaceous vertebrates. Among the specimens recovered so
An. Acad. Bras. Ciênc.. Publicado em: 02/12/2019
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2. The last dinosaurs of Brazil: The Bauru Group and its implications for the end-Cretaceous mass extinction
ABSTRACT The non-avian dinosaurs died out at the end of the Cretaceous, ~66 million years ago, after an asteroid impact. The prevailing hypothesis is that the effects of the impact suddenly killed the dinosaurs, but the poor fossil record of latest Cretaceous (Campanian-Maastrichtian) dinosaurs from outside Laurasia (and even more particularly, North America
An. Acad. Bras. Ciênc.. Publicado em: 2017-09
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3. Carbonate Buildups in the Pernambuco Basin, NE Brazil
ABSTRACT The Pernambuco Basin represents one of the most prominent regions for deep water oil and gas exploration off the Brazilian coast. This study aims to identify and describe the occurrence of carbonate buildups in the offshore regions of the basin. The study was based on an analysis of a set of 143 2D time-migrated seismic sections that cover the offsh
An. Acad. Bras. Ciênc.. Publicado em: 2017-06
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4. Micromorphology of Paleosols of the Marília Formation and their Significance in the Paleoenvironmental Evolution of the Bauru Basin, Upper Cretaceous, Southeastern Brazil
ABSTRACT Deduction of associated paleoenvironments and paleoclimate, definition of the chronosequence of paleosols, and paleogeographic reconstruction have become possible through the application of micromorphology in paleopedology. Micromorphology has also been useful in recognition of weathering processes and definition of minerals formed in succession. In
Rev. Bras. Ciênc. Solo. Publicado em: 13/02/2017
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5. Microbial filaments in stromatolites and laminites of Balbuena III Sequence (Maastrichtian/Danian) of Yacoraite Formation in Metán-Alemania Sub-basin, Salta region, Argentina, and its alaeoenvironmental significance
RESUMO A Bacia de Salta localiza-se no noroeste argentino e sua origem está relacionada a um rifte intracontinental, formado durante o Cretáceo e início do Paleógeno. Subdivide-se em quatro sub-bacias (Lomas de Olmedo a leste; Sey a oeste; Tres Cruces a norte; e Metán-Alemania a sul) que foram preenchidas por sedimentos dos Subgrupos Pirgua (fase sin-ri
Braz. J. Geol.. Publicado em: 2015-09
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6. Taxonomia, distribuição estratigráfica e paleoecologia de ostracodes do Cretáceo Superior, Coniaciano, ao Mioceno da Bacia de Santos, Margem Continental Sul do Brasil
The Santos basin is located the continental southern margin of Brazil. One hundred twenty two cutting samples recovered from three wells in Santos basin, two located in the shelf, 1- SPS-5A and 1-SPS-9, and one in slope, 1-SCS-9A. Relative dating based on microfossils, the lower portions of the wells 1-SPS-5A, 1-SCS-9A and 1-SPS-9 are attributed to the Conia
Publicado em: 2009
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7. Ostracodes cretáceos (Turoniano-Maastrichtiano) da Bacia do Pará-Maranhão: aspectos taxonômicos, paleoecológicos e paleobiogeográficos
This work presents the results of the taxonomic study of the Turonian-Maastrichtian marine ostracodes of Pará-Maranhão Basin, their palaeoenvironmental responses and paleobiogeographical distribution. The 65 studied samples are from two wells: the 1-MAS-16 (3552-4990 m, Turonian-Maastrichtian) and the 1-MAS-12 (2145-2685 m, Campanian-Maastrichtian). 841 sp
Publicado em: 2008
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8. Inter-relação paleossolos e sedimentos em lençois de areia eolica da Formação Marilia (noroeste da Bacia Bauru) / Iterrelation of palaeosols and sediment in the ancient Marilia Formation aeolian sand sheets (northwestern Bauru Basin)
The Marília Formation (Maastrichtian), outcropping in the northwestern portion of the Bauru Basin (Goiás and Mato Grosso do Sul brazilian states), is interpreted here as an ancient Aeolian sand sheet. The vertical succession, c.150 m thick, is made up of very fine to medium-grained sandstone and, it is characterised by cyclic interbedding of sediments and
Publicado em: 2008
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9. Caracterização tectono-estratigráfica da sequência transicional na sub-bacia de Sergipe
This thesis deals with the tectonic-stratigraphic evolution of the Transitional Sequence in the Sergipe Sub-basin (the southern segment of the Sergipe-Alagoas Basin, Northeast Brazil), deposited in the time interval of the upper Alagoas/Aptian stage. Sequence boundaries and higher order internal sequences were identified, as well as the structures that affec
Publicado em: 2008
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10. Evolução, geometria e preenchimento do complexo de canyons de brejo Grande, bacia de Sergipe-Alagoas
Este estudo teve como objetivo principal a definição da origem, evolução, geometria e preenchimento do Complexo de Canyons de Brejo Grande. Este complexo está incluído no intervalo maastrichtiano do Grupo Piaçabuçu, que é composto por uma cunha sedimentar progradante, depositada num sistema plataforma-talude-bacia, do Cretáceo Superior ao Quaterná
Publicado em: 2007
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11. Seismic interpretation of post-aptian magmatic events in the Cabo Frio high, Southeast Brazil, its genesis and its relation with pre-salt alignments / Interpretação sísmica dos eventos magmáticos pós-aptianos no alto de Cabo Frio, sudeste do Brasil, gênese e relação com os lineamentos pré-sal
The continental shelf of the Cabo Frio Area, at the southern part of the Campos Basin, shows unique features in its tectono-sedimentary evolution when compared to other areas of the Campos and Santos basins. The presence of a regular pattern of antithetic faults in the basement and in the syn-rift and the post-rift sedimentary sections, along with important
Publicado em: 2006
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12. EvoluÃÃo da Bacia ParaÃba Durante o Maastrichtiano-paleoceno - FormaÃÃes gramame e Maria Farinha, NE do Brasil / Evolution of the ParaÃba Basin During the Maastrichtiano-paleoceno - Formations gramame and Maria Flour, NE of Brazil
This work presents new information about the evolution of the Paraiba Basin during the Maastrichtian-Paleocene times. This period is represented by Gramame and Maria Farinha formations, carbonate units which occur in this basin. The main purpose of the present work was the improvement of the existent knowledge about these units. This research has used data f
Publicado em: 2004