990 resultados para Granada (Provincia)
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In the colonial period, the Spanish politics towards the American frontiers was oriented not only to recognition and military protection of the borders, but also to control trade in the regions. During the demarcation of the boundaries in the 18th Century, the smuggling in the borders degenerated in various conflicts between the Spanish and Portuguese authorities. However, illegal trade played an important role en la satisfaction of the provisions in the zone, making possible the establishment of local alliances. This article addresses these questions taking as object the study the border Luso-Spanish in the Amazon Valley, between captaincy of Negro River and the province of Maynas, 1780-1820.
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Este trabajo analiza la concepción de las políticas públicas en torno a sectores históricamente marginados bajo la óptica de las acciones afirmativas. Se muestra la relación entre los pueblos y nacionalidades y el Estado, enfatizando el caso ecuatoriano y la implementación del Plan Plurinacional para Eliminar la Discriminación Racial y la Exclusión Étnica cuya propuesta plantea superar la exclusión y la discriminación de la cual han sido víctimas ciertos grupos poblacionales en el Ecuador. De esta manera, “el objetivo fundamental de este trabajo es realizar un balance de la aplicación de las políticas de acción afirmativa contenidas en el Plan Plurinacional para eliminar la Discriminación Racial y la Exclusión Étnica en la provincia de Bolívar, utilizando diferentes fuentes de consulta que van desde documentos de análisis sobre la situación del racismo y la discriminación racial a documentos oficiales y uso de entrevistas”.
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La inserción de la ciencia en el virreinato de la Nueva Granada a partir de las reformas escolares de finales del siglo XVIII ha sido tema de amplio debate en la historiografía universitaria colombiana. Este libro, precisamente, inserta el caso de José Félix de Restrepo a esta discusión, investigando cómo fue la asimilación y la difusión de la «filosofía útil» en su experiencia como estudiante y catedrático, durante las transformaciones que sufrió la educación luego de la expulsión de los jesuitas. José Félix de Restrepo fue una importante figura cultural y política de finales del siglo XVIII y de los primeros años del siglo XIX. Si bien no fue un pensador destacado, como sí lo fueron muchos de sus estudiantes, es innegable su labor como educador y difusor de la ciencia a finales del período colonial. Por esta razón, el rastreo de sus actividades educativas entre 1773 y 1791 es una importante fuente histórica para entender el dinamismo con el que la ciencia se insertó en los programas educativos de los colegios coloniales.
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The Granada ignimbrite, an Upper Miocene volcanic unit from the northern Puna, previously has been interpreted as an extensive ignimbrite (>2300 km(2)) associated with eruptions from the Vilama caldera (trap-door event). On the basis of new data, we revise its correlation and redefine the unit as a compound, high aspect ratio ignimbrite, erupted at approximately 9.8 Ma. Calculated volumes (similar to 100 km(3)) are only moderate in comparison with other large volume (>1000 km(3)) ignimbrites that erupted approximately 2-6 m.y. later in the region (e.g. Vilama, Panizos, Atana). Six new volcanic units are recognized from sequences previously correlated with Granada (only one sourced from the same center). Consequently, the area ascribed to the Granada ignimbrite is substantially reduced (630 km(2)), and links to the Vilama caldera are not supported. Transport directions suggest the volcanic source for the Granada ignimbrite corresponds to vents buried under younger (>= 7.9-5 Ma) volcanic rocks of the Abra Granada volcanic complex. Episodes of caldera collapse at some stage of eruption are likely, though their nature and timing cannot be defined from available data. The eruption of the Granada ignimbrite marks the onset of a phase of large volume (caldera-sourced) volcanism in the northern Puna. (C) 2007 Elsevier Ltd. All rights reserved.
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The Borborema Province, Northeastern Brazil, had its internal structure investigated by different geophysical methods like gravity, magnetics and seismics. Additionally, many geological studies were also carried out to define the structural domains of this province. Despite the plethora of studies, there are still many important open aspects about its evolution. Here, we study the velocity structure of S-wave in the crust using dispersion of surface waves. The dispersion of surface waves allows an estimate of the average thickness of the crust across the region between the stations. The inversion of the velocity structure was carried out using the inter-station dispersion of surface waves of Rayleigh and Love types. The teleseismic events are mainly from the edges of the South and North American plates. The period of data collection occurred between 2007 and 2010 and we selected 7 events with magnitude above 5.0 MW and up to 40 km depth. The difference between the events back-azimuths and the interstation path was not greater than 10. We also know the depth of the Moho, results from Receiver Functions (Novo Barbosa, 2008), and use those as constrains in inversion. Even using different parameterizations of models for the inversion, our results were very similar the mean profiles velocity structure of S-wave. In pairs of stations located in the Cear´a Central Domain Borborema the province, there are ranges of depths for which the velocities of S are very close. Most of the results in the profile near the Moho complicate their interpretation at that depth, coinciding with the geology of the region, where there are many shear zones. In particular, the profile that have the route Potiguar Bacia in inter-station, had low velocities in the crust. We combine these results to the results of gravimetry and magnetometry (Oliveira, 2008) and receptor function (Novo Barbosa, 2008). We finally, the first results on the behavior of the velocity structure of S-wave with depth in the Province Borborema
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