Cenozoic
Mostrando 1-12 de 54 artigos, teses e dissertações.
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1. Distribution of European and African species of genus Diaptomus (Copepoda: Calanoida: Diaptomidae): a track analysis
ABSTRACT The distributional patterns of 13 species of Diaptomus Westwood, 1836 were analyzed using the panbiogeographical method of track analysis. Locality records were compiled from the literature and mapped for the construction of individual tracks for each species. These tracks were superimposed to find the generalized tracks. Four generalized tracks wer
Nauplius. Publicado em: 03/12/2018
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2. Nepheline syenites to syenites and granitic rocks of the Itatiaia Alkaline Massif, Southeastern Brazil: new geological insights into a migratory ring Complex
ABSTRACT: The Itatiaia Alkaline Massif comprises some of the largest meso-cenozoic alkaline igneous occurrences in Brazil, covering over 215 km2 between the states of Minas Gerais and Rio de Janeiro. It appears as an elongated, 30-km long and 4.5-11.5-km wide SE-NW-trending body emplaced along accommodation zones of the Continental Rift of Southern Brazil, i
Braz. J. Geol.. Publicado em: 21/05/2018
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3. The 2009 earthquake, magnitude mb 4.8, in the Pantanal Wetlands, west-central Brazil
ABSTRACT The main goal of this paper is to characterize the Coxim earthquake occurred in June 15th, 2009 in the Pantanal Basin and to discuss the relationship between its faulting mechanism with the Transbrasiliano Lineament. The earthquake had maximum intensity MM V causing damage in farm houses and was felt in several cities located around, including Campo
An. Acad. Bras. Ciênc.. Publicado em: 25/08/2016
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4. Diversidade, diferenciação e biogeografia de pequenos mamíferos não-voadores na Mata Atlântica ao norte do rio São Francisco Centro de Endemismo Pernambuco / Diversity, differentiation and biogeography of non-volant small mammals of the Atlantic Forest north of São Francisco river - Pernambuco Endemism Center
The Brazilian tropical rainforests (Amazon and Atlantic Forest) present high species diversity and are currently separated by a belt of open and dry vegetation. Part of this belt is occupied by the Caatinga, where are found the Brejos de Altitude, evidence of the historical connections between the Atlantic Forest and the Amazon. The Pernambuco Endemism Cente
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/08/2011
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5. Tecttôniica póss--riifftte na Baciia Pottiiguar
Os estudos sobre as bacias sedimentares brasileiras se concentram em sua fase rifte, enquanto a fase pós-rifte tem sido considerada um período de pouca atividade. A sequência pós-rifte da Bacia Potiguar, no extremo nordeste brasileiro, já foi considerada pouco deformada, contudo, inúmeros trabalhos vêm demonstrando como ela é afetada por importantes
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/02/2011
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6. Influência de níveis de base nas características morfossedimentares das bacias dos rios das Velhas e Jequitaí (MG)
The Velhas and Jequitaí river basins have together an asymmetric shape that drain northward from Quadrilátero Ferrífero to the northern Minas Gerais State. These two basins are affluent of São Francisco river in its right margin. The headwaters of Velhas and Jequitaí rivers are dominated by quartzites ridges structured during the Brazilian orogenic cycl
Publicado em: 2010
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7. Gênese, distribuição e caracterização dos espongilitos do noroeste de Minas Gerais
This study relates to the spongillites deposits that occurs in shallow ponds on a karstic planation surface developed on rocks of the Neoproterozoic São Francisco Supergroup. Cenozoic siliciclastics sediments are related to this surface and Mesozoic Areado Group rocks occur adjacent to the deposits. Field studies associated with the analysis of multispectra
Publicado em: 2009
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8. Paisagem natural paleógena da bacia sedimentar de São Paulo no município de Guarulhos, Estado de São Paulo.
Sedimentary rocks of Cenozoic age, composed primarily of sand and clays, can be found in the city of Guarulhos, located in the metropolitan area of the city of São Paulo, State of São Paulo, Brazil. Paleogene sediments of this region represent a significant source of water for urban, industrial and agricultural activities. This basin is an integral part of
Publicado em: 2008
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9. Determinação da recarga profunda na bacia-piloto do Ribeirão da Onça em zona de afloramento do Sistema Aqüífero Guarani a partir de balanço hídrico em zona saturada / Determination of the deep recharge in the Ribeirão da Onça pilot basin in the outcrop zone of the Guarani Aquifer System through water balance in the saturated zone
Main objective of this work was the determination of the deep recharge in the Ribeirão da Onça basin through water balance in the soil saturated zone. This basin is located in the outcrop zone of the Guarani Aquifer System (GAS) in the São Paulo State - Brazil and is covered by cenozoic sedimentary soil. The water balance model involved the determination
Publicado em: 2008
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10. A unidade Maria Preta : geologia, geoquimica e petrogenese de rochas vulcanicas e sub-vulcanicas intermediarais a felsicas no "Greenstone Belt" do rio Itapicuru, Bahia / The Maria Preta unit : geology, geochemistry and petrogenesis of volcanic and sub-volcanic intermediate to felsic rocks in the Rio Itapicuru greenstone belt, Bahia
New geochemical data on andesites and dacites of the Maria Preta Unit, Rio Itapicuru Greenstone Belt, revealed two distinct geochemical groups: one of adakitic affinity and another of typical calc-alkaline. The adakitic suite, localized west in the unit, is characterized by high values of Sr/Y and Ti/YN >1. It shows enrichment in LFSE (Low Field Strength Ele
Publicado em: 2008
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11. Influência do uso da terra na incidência de processos de dinâmica superficial na região de Marília (SP)
The study area comprises the western portion of the Marília Plateau, State of São Paulo, southeastern Brazil, whose geological substrate encompasses Cretaceous sedimentary rocks of the Bauru Group and local Cenozoic units like colluvium aprons, fluvial terrace deposits, in situ regoliths, and modern alluvial deposits. In a geomorphologic sense, the study a
Publicado em: 2008
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12. A história do intemperismo na Província Borborema Oriental, Nordeste do Brasil: implicações paleoclimáticas e tectônicas
Until some years ago, weathering geochronology was primarily based on the K-Ar and 40Ar/39Ar dating of supergene minerals. Recent advances in the analysis of supergene goethite by the (U-Th)/He method expanded the number of suitable minerals for such purpose, as well as the time of application for weathering geochronology. This study represents the first sys
Publicado em: 2008