Thesis Collection
Last Deposit
Browsing Geogaceta -- Nº 20-5, (1996) by Issue Date
Now showing items 1-20 of 69
-
Migraciones intercontinentales y eustasia: el datum de Hipparion
(Sociedad Geológica de España, 1996)The magnetostràtigraphic study of vallesian sites in the Vallès-Penedès Basin (NE Spain) provides a reliable dating of the earliest appearance of Hipparion at 11.1 Ma. Good agreement with radiometric ages from other sites ... -
Interrelation entre la valoración de los recursos pétreos y la Planificación del Territorio. Los áridos graníticos y basálticos del Ámbito Territorial Metropolitano de Barcelona
(Sociedad Geológica de España, 1996)Characteristics of granitic and basaltic rocks, restrictions that bear the present-day urban planning and use of ground and the environment conditions, have been studied to evaluate the possibilities that a territory offers ... -
Estudio de las propiedades magnéticas en las terrazas del río Tajo: implicaciones paleoambientales
(Sociedad Geológica de España, 1996)Soil profiles from 12 terraces of Plio-Pleistocene to Holocene age from the Tajo river in Central Spain were investigated on there rock magnetic properties. Systematic profiles were sampled in 0.1m intervals from 24 fresh ... -
Incidencia de las emisiones de una gran central térmica en la composición del material particulado atmosférico
(Sociedad Geológica de España, 1996)The present work focuses on the characterization of atmospheric total suspended particles (TSP) around a large coal-fired power station in NE Spain. The study was performed through sampling TSP by means o f high volume ... -
Paleomagnetismo y deformación reciente en la zona interna de las Béticas orientales
(Sociedad Geológica de España, 1996)A paleomagnetic and rockmagnetic study was carried out on rocks from 33 volcanic and 12 sedimentary sites of Serravalian/Tortonian to Pliocene/Quaternary age in the internal zone of the eastern Betic Cordillera. After ... -
La «Fana» de Genestaza: un ejemplo de sistema torrencial activo en la Cordillera Cantábrica
(Sociedad Geológica de España, 1996)«La Fana de Genestaza» is an active mountain torrent representative of these kind of systems in the Cantabrian Mountains. As the field evidences show, the availability of non consolidated material in the catchment area is ... -
Estudio magnético y paleomagnético de coladas históricas del Etna (Sicilia, Italia)
(Sociedad Geológica de España, 1996)70 basaltic lava flows from Mt. Etna erupted in 1910, 1928, 1950 and 1979 were sampled to carry out rockmagnetic studies In order to determine their magnetic mineralogy and paleomagnetic stability and to asses their ... -
Propuesta de un modelo cronológico para las terrazas de los ríos de la vertiente cantábrica
(Sociedad Geológica de España, 1996)A new fluvial terraces chronology Is proposed for the rivers in northern Cantabrian Range. Six terrace levels were identified and mapped. These have average heights of 2,5; 10; 15; 20; 35; and 63 m above river level. Four ... -
Impacto ambiental de la minería en el devenir histórico de la comarca de Río Tinto (Huelva)
Fernández Caliani, Juan Carlos
; Galán Huertos, Emilio (Sociedad Geológica de España, 1996)
As a consequence of the large mining operations occurred at Rio Tinto area (SW Spain) since prehistoric times, forests were demolished, rivers were polluted by heavy metals, sulphates and suspended particles, air was ... -
Extracción selectiva de Pb, Ni y Cd en un suelo no contaminado en relación con la heterogeneidad del mismo
(Sociedad Geológica de España, 1996)The topsoil of on arable field was characterized as homogeneous for major element contents by Xray fluorescence. Total concentrations o f potentially toxic metals, as extractable by aqua regia digestion, showed no heavy ... -
El magmatismo calco-alcalino, pérmico, de la cadena Ibérica: su interés como Patrimonio Geológico
(Sociedad Geológica de España, 1996)Some criteria are here exposed (petrology, tectonics, stratigraphy and fosil data) in order to include some representative outcrops of the Permian calk-alcaline magmatism (SW, Iberian Range) within the Geological Heritage -
Nuevos datos sobre la estratigrafía del relleno cuaternario de la depresión de Comeya (Picos de Europa, Asturias)
(Sociedad Geológica de España, 1996)Two core-holes have been drilled in the Comeya alpine graben in order to obtain new data about the stratigraphycal characteristics of the sedimentary fill of the basin and to check its geometry, previously deduced by ... -
Magnetoestratigrafía del Neógeno del sector central de la Cuenca del Duero
(Sociedad Geológica de España, 1996)Several biostratigraphic studies have been carried out on lacustrine and fluvial-lacustrine sediments in the neogene Duero Basin, these show that most of the outcrop depositional sequence belongs to the Aragonian - Upper ... -
El magmatismo Toleítico, Trías-Lías, de la cadena pirenaica: afloramiento con interés en el Patrimonio Geológico
(Sociedad Geológica de España, 1996)In this paper, a selection o f the most important features of Triassic tholeiitic dolerites in the Pyrenean domain, and the description of the best outcrops of this magmatism are exposed. The inclusion o f these outcrops ... -
Resultados paleomagnéticos preliminares en el vulcanismo neógeno de la Sierra de Las Cruces (Valle de México, México)
(Sociedad Geológica de España, 1996)A palaeomagnétic study have been carried out on the western margin of the México basin. 24 sites from Sierra de Las Cruces were sampled and analyzed in the laboratory. A total amount of 237 samples has been fully demagnetized ... -
Impacto ambiental previsto en la explotación de gravas en la zona del curso medio del Río Fluviá (La Garrotxa, prov. de Girona)
(Sociedad Geológica de España, 1996)The main environmental impacts related to the gravel pits in the medium course of the Fluvia river have been assessed. In order to compute the global impact an index based on the numerical values of different impacts has ... -
Sedimentación lacustre y ciclicidad: las sucesiones fluvio-lacustres del Oligoceno superior del sector SE de la cuenca del Ebro
(Sociedad Geológica de España, 1996)A cyclostratigraphic study of Late Oligocene fluvio-lacustrine and lacustrine sequences was carried out in the Ebro basin. Fourier spectral analysis was used to analyze four stratigraphic and sedimentological parameters ... -
Generación automática de mapas de daños sismoinducidos
(Sociedad Geológica de España, 1996)In this paper a computer program that computes seismic intensities, loss estimate and liquefaction occurrence is shown. This program works with both punctual and lineal sources and allows for site effects, it need very few ... -
Aplicación de técnicas estructurales y geoquímicas para la caracterización de fracturas conductoras en el batolito de La Cabrera (España central)
(Sociedad Geológica de España, 1996)Groundwater flow and solute transport within fractured crystalline rocks are mainly controlled by the geometry and the properties of each individual fracture. The hydrogeological characterization of a g ra n itic m assif ... -
Fábrica magnética en las limolitas wealdenses del borde oriental de la Cuenca de Cameros (Cordillera Ibérica): correlación con la deformación finita
(Sociedad Geológica de España, 1996)The Anisotropy of Magnetic Susceptibility (AMS) of some wealdian siltstones outcroping in the eastern border of the Sierra de Cameros (NW Iberian Chain) has been analyzed in order to stablish its correlation with strain. ...
