Cretaceous Tertiary
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Biogeography on the early distribution of cuckoos (Aves: Cuculiformes)
Cuckoos are widely distributed, but are concentrated in the tropics, where they occupy a wide range of habitats. Both terrestrial and arboreal behaviors can be found in this group, but there is no consensus on as to whether these behaviors have arisen more than once. Moreover, the historical distribution of cuckoos is poorly understood. This paper presents a
Zoologia (Curitiba). Publicado em: 2012-06
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2. Regional features of the onshore portion of the Cabo Frio High and its continuation towards the Campos and Santos Basin. / Feições regionais da região emersa do Alto de Cabo Frio e sua continuação para as Bacias de Campos e Santos.
The present work presents the results of a geological and geophysical study that used several tools and methods (particularly gravimetric data, magnetic data, and field work) in the attempt to identify the megastructures in the Cabo Frio High province, and their possible continuation towards the Campos and Santos coastal basins. The same tools were also used
Publicado em: 2006
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3. 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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4. Estudo da dinâmica costeira da região da foz do rio Piranhas-Açu para geração de mapas de sensibilidade do litoral ao derramamento de óleo
The study area is located in the northern coast of Rio Grande do Norte State comprising the mouth of Açu-Piranhas river including the cities of Porto do Mangue e Areia Branca. The local geological setting comprises Cretaceous, Tertiary and Quaternary geological units of the Potiguar Basin. One is about a region of high morphologic instability due to action
Publicado em: 2005
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5. 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
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6. Diversification of Ramphastinae (Aves, Ramphastidae) prior to the Cretaceous/Tertiary boundary as shown by molecular clock of mtDNA sequences
Partial cytochrome b and 12S rDNA mitochondrial DNA sequences of eight representatives of the Ramphastidae family were analyzed. We applied the linearized tree method to identify sequences evolving at similar rates and estimated the divergence times among some of the taxa analyzed. After excluding Ramphastos tucanus and Capito dayi from our data set, the rem
Genetics and Molecular Biology. Publicado em: 2003-12
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7. Cartografia temporal e análise geoambiental da dinâmica da foz do Rio Piranhas-Açu, regiao de Macau-RN, com base em imagens Landast 5-MT
This work embraces the application of Landsat 5-TM digital images, comprising August 2 1989 and September 22 1998, for temporal mapping and geoenvironmental analysis of the dynamic of Piranhas-Açu river mouth, situated in the Macau (RN) region. After treatment using several digital processing techniques (e.g. colour composition in RGB, ratio of bands, princ
Publicado em: 2001
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8. Distributional patterns and possible origin of leafhoppers (Homoptera, Cicadellidae)
The zoogeographical distribution of 42 cicadellid subfamilies and their assigned tribes and genera is compiled with distributional maps and proposed dispersal pathways of genera that are shared interzoogeographically. Possible origin of the subfamilies and tribes is proposed in an ancestral context from which the more modern extant groups evolved whereas ori
Revista Brasileira de Zoologia. Publicado em: 2000-03
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9. Estudos sedimentológicos e o contexto estrutural da formação Serra do Martins, nos platôs de Portalegre, Martins e Santana/RN
This dissertation deals with sedimentological and structural framework of the siliciclastic rock of the Serra do Martins Formation (FSM) in the Portalegre, Martins and Santana plateau, located to the south of Potiguar Basin, in the southwest and central Rio Grande do Norte state. This formation, regarded as of Oligo-Miocene age based on intrusive relations o
Publicado em: 1999
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10. Avian evolution, Gondwana biogeography and the Cretaceous-Tertiary mass extinction event.
The fossil record has been used to support the origin and radiation of modern birds (Neornithes) in Laurasia after the Cretaceous-Tertiary mass extinction event, whereas molecular clocks have suggested a Cretaceous origin for most avian orders. These alternative views of neornithine evolution are examined using an independent set of evidence, namely phylogen
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11. Leaf assemblages across the Cretaceous-Tertiary boundary in the Raton Basin, New Mexico and Colorado
Analyses of leaf megafossil and dispersed leaf cuticle assemblages indicate that major ecologic disruption and high rates of extinction occurred in plant communities at the Cretaceous-Tertiary boundary in the Raton Basin. In diversity increase, the early Paleocene vegetational sequence mimics normal short-term ecologic succession, but on a far longer time sc
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12. An atmospheric pCO2 reconstruction across the Cretaceous-Tertiary boundary from leaf megafossils
The end-Cretaceous mass extinctions, 65 million years ago, profoundly influenced the course of biotic evolution. These extinctions coincided with a major extraterrestrial impact event and massive volcanism in India. Determining the relative importance of each event as a driver of environmental and biotic change across the Cretaceous-Tertiary boundary (KTB) c
The National Academy of Sciences.