Buscar
Mostrando ítems 6591-6600 de 17736
Geochronological constraints on the age of a Permo-Triassic impact event: U-Pb and Ar-40/Ar-39 results for the 40 km Araguainha structure of central Brazil
(PERGAMON-ELSEVIER SCIENCE LTDOXFORD, 2012)
Impact cratering has been a fundamental geological process in Earth history with major ramifications for the biosphere. The complexity of shocked and melted rocks within impact structures presents difficulties for accurate ...
Dating coeval mafic magmatism and ultrahigh temperature metamorphism in the Anapolis-Itaucu Complex, Central Brazil
(ELSEVIER SCIENCE BV, 2011)
Dating granulites has always been of great interest because they represent one of the most extreme settings of an orogen. Owing to the resilience of zircon, even in such severe environments, the link between P-T conditions ...
Geochemical evidence of the 8.2 ka event and other Holocene environmental changes recorded in paleolagoon sediments, southeastern Brazil
(Academic Press INC Elsevier ScienceSan Diego, 2012)
The paleoclimatic record of Jureia Paleolagoon, coastal southeastem Brazil, includes cyclic and gradual changes with different intensities and frequencies through geological time, and it is controlled by astronomical, ...
OSL age determinations of Pleistocene fluvial deposits in Central Amazonia
(Academia Brasileira de Ciências, 2010)
Absolute dating methods have been used in chronological studies of geological processes and sedimentary units of Quaternary age in Central Amazonia, Brazil. Although radiocarbon dating has been very useful in archaeological ...
La alfarería del primer milenio AD de la quebrada de Amaicha (Departamento Tafí del Valle, Provincia de Tucumán): aportes sobre sus aspectos tecnológicos y potenciales materias primasFirst millennium AD pottery from the Quebrada de Amaicha (Tafí del Valle Department, Tucumán Province): Insights on technology and potential raw materials
(Universidad de Buenos Aires. Facultad de Filosofía y Letras. Instituto de Arqueología, 2017-09)
Este trabajo constituye el primer abordaje sistemático sobre la manufactura alfarera en la Quebrada de Amaicha durante el primer milenio AD. Nos centramos en las primeras etapas de la cadena operativa, aquellas que involucran ...
The Most Ancient Platyperlidae (Insecta, Perlida= Plecoptera) from Early Late Triassic Deposits in Southern South AmericaEl más antiguo platyperlidae (insecta, perlida= plecoptera) en depósitos del triásico superior temprano del sur de Sudamérica
(Asociacion Paleontologica Argentina, 2011-12)
The new insect species Platyperla marquati sp. nov. described herein is represented by a nymphal stage and belongs to the Order Perlida (= Plecoptera) Latreille (stoneflies). It comes from the uppermost section of the ...
Análise e Avaliação dos Problemas Existentes na Fachada de Arenito do Museu Júlio de Castilhos, Porto Alegre, RSAvaliation and analisys of the sandstone façade problems in the Julio de Caltilhos Museum, Porto Alegre, RS, Brazil
(Instituto de Geociências /Universidade Federal do Rio Grande do Sul, 2007)
Technological analysis of Cerro do Sandi and Bela Vista granites, Piratini-RS, Brazil, for use as ornamental rocksAnálise Tecnológica dos Granitos Cerro do Sandi e Bela Vista, Piratini-RS Para Uso Como Rocha Ornamental
(Instituto de Geociências /Universidade Federal do Rio Grande do Sul, 2006)
Rb-Sr systematics applied to sedimentary rocks: the example of Paraná Basin, BrazilO Método Radiométrico Rb-Sr Aplicado em Rochas Sedimentares o Exemplo da Bacia do Paraná, Brasil
(Instituto de Geociências /Universidade Federal do Rio Grande do Sul, 2006)
The electron backscaterred diffraction technique -EBSD- in a scanning eletronic microscope and its application in the study of deformed rocksA Técnica de Difração de Elétrons Retro-Espalhados (EBSD) em Microscópio Eletrônico de Varredura (MEV) e sua Aplicação no Estudo de Rochas Deformadas
(Instituto de Geociências /Universidade Federal do Rio Grande do Sul, 2007)