Thesis Collection
Last Deposit
Browsing Geogaceta -- Nº 18, (1995) by Title
Now showing items 1-20 of 54
-
Abanicos aluviales de la cuenca norte de Madrid. Análisis matemáticos
(Sociedad Geológica de España, 1995)Aluvial fan deposits in the Tertiary North Basin of Madrid have been studied by geophysical logging in several hidrogeological boreholes. Thus, spectral and statistical analysis are used as tools to confirm the sedimentological ... -
Aluminium mohility in hydrothermally altered granités
(Sociedad Geológica de España, 1995)Immobile elements are used to evaluate metasomatism caused by hydrothermal alteration in Linares granite related to Ba-(base metals) veins. Mass transfers of Aluminium (which Is commonly considered as the best monitor) are ... -
Análisis de la fracturación en los afloramientos mesozoicos del suroeste español
García Navarro, Encarnación
; Perelló Lull, M. V.; Fernández Rodríguez, Carlos (Sociedad Geológica de España, 1995)
The Mesozoic outcrops of southwestern Spain show a complex succession of sedimentary and volcanic rocks. Their deposition is related to the first episodes of rifting between Africa and Iberia that took place from the Late ... -
Cambios históricos de los cauces de los ríos Tajo y Jarama en Aranjuez
(Sociedad Geológica de España, 1995)Changes in channel morphology between 1775 and 7 988, at the confluence of Jarama and Tajo rivers near Aranjuez, have been studied. In contrast to the relative stability of the Tajo river upstream of the confluence with ... -
Características sedimentológicas de los materiales volcaniclásticos de la zona de La Fortaleza (Tenerife, Islas Canarias, España)
(Sociedad Geológica de España, 1995)Near the Teide volcano National Park (La Fortaleza area), some Plio-Quaternary pyroclastic materials with different types of sedimentary structures are preserved. The outcrop is made up of coarse pyroclastic materials ... -
Composición isotópica de los yesos Messinienses de la cuenca de Fortuna (Murcia): implicaciones sedimentológicas
(Sociedad Geológica de España, 1995)Isotopic composition ('5,sO/ <5” S) o f gypsum forming the three evaporitic units o f the Fortuna basin reveals the marine or continental origin of these deposits. In contrast to previous interpretations, a sedimentation ... -
Confluencia Genil-Guadalquivir (Córdoba): Cuaternario fluvial y localizaciones del Paleolítico
(Sociedad Geológica de España, 1995)The confluence Genil-Guadalquivir in Palma del Río (Córdoba), shows a system composed by four terraces of the Upper and Middle Pleistocene and two episodes of colluvial deposits. The Paleolithic sites (Acheulean and Middle ... -
Consecuencias geomorfológicas derivadas de un proceso de captura fluvial
(Sociedad Geológica de España, 1995)The recent capture of the drainage of the ancient endohreic Guadix-Baza basin is favoured by a process of uplift implyng northwestward tilting and shift of the ancient axial master drainage system. Since the capture onwards ... -
Control tectónico en la evolución de una plataforma liásica aislada en las Cordilleras Béticas (Prov. de Murcia y Almería)
(Sociedad Geológica de España, 1995)The evolution of a genetic unit of the Lias to the North of Velez-Rubio (External Zones of the Betic Cordilleras, South-east of Spain) has been studied. This unit, at its lower and upper boundaries, is limited by ... -
Depósitos fluviales paleógenos en el sector suroriental de la cuenca del Ebro: tipos de incisión y relleno
(Sociedad Geológica de España, 1995)The outcrops of Scala Dei (Colombo, 7 980) and Guadalope-Matarraña (Cabrera, 1983) alluvial systems are located in the SE sector of the Ebro basin. These alluvial systems were developed during the Palaeogene between the ... -
Determinación de los tensores de deformación y esfuerzo en calizas mediante el estudio comparado de poblaciones de fallas y del maclado mecánico de la calcita
(Sociedad Geológica de España, 1995)The strain tensor in limestones has been calculated using the strain-gauge technique (Croshong, 1972). This method is based in the analysis of the mechanical twinning in calcite. In the same outcrops, these-results have ... -
Determinación experimental de la función de dilatancia de un suelo granular denso
(Sociedad Geológica de España, 1995)This paper presents an experimental method to determine the dilatancy function of a dense granular soil. The knowledge of that function is essential to modelize the geomechanical behaviour of the soil because it controls ... -
Diferenciación química de aguas subterráneas mediante Análisis Multivariante. Aplicación a los acuíferos de la Sierra de Gádor (Almería)
(Sociedad Geológica de España, 1995)Waters in carbonate materials have often been classified on a hydrogeologic basis. The significance of each grouping in understanding the geochemical processes acting in the aquifer dependents on the classes having a ... -
El límite de las Biozonas Transversarium y Bifurcatus (Oxfordiense Medio) en la Cordillera Ibérica nororiental: discontinuidades y lagunas estratigráficas asociadas
(Sociedad Geológica de España, 1995)A biostratigraphic study of Middle Oxfordian, Transversarium to Bifurcatus Zone rocks in the northeastern Iberian Chain (Spain) has been taken along six detailed sections providing very close ammonite control. The deposition ... -
Estructura y metamorfismo del Macizo Hercínico de Rehamna (Meseta Occidental, Marruecos)
(Sociedad Geológica de España, 1995)The structure of the Rehamna Massif, in the Moroccan Hercynian Belt, can be related to the development of a first compressive regime followed by another one of extensional character. The Skhour Nappe and Eastern Rehamna ... -
Estructuración de los prismas litorales del Cabo de Gata: respuesta a los cambios climático-eustáticos holócenos
(Sociedad Geológica de España, 1995)The internal structuration of the littoral wedge has been made by means of high resolution seismic stratigraphy analysis in front of Cabo de Cata sector (Almeria). Four seismic units have been described: Seismic Unit 7.- ... -
Estructuras pseudoanticlinales inducidas por fluidificación en la Unidad Intermedia de la cuenca de Calatayud
(Sociedad Geológica de España, 1995)Soft sediment deformation structures are described in a dolomitic palustrine-lacustrine sequence in the neogene Calatayud basin. Pseudoanticlines with associated dish structures are possibly result of a fluidization process ... -
Estructuras tectónicas en el basamento de la cuenca de Madrid y su reflejo en la cobertera sedimentaria
(Sociedad Geológica de España, 1995)A group of NW-SE strike-slip faults have been recognized in the basement of the eastern part of Madrid basin. The sedimentary data considered concern m a in ly isopach map of Miocene Intermediate Unit as well as ... -
Estudio de plagioclasas de granitoides híbridos del Macizo Ibérico mediante microscopía de Interferencia de Contraste Nomarski
Rosa Díaz, Jesús de la; Quintero, M. (Sociedad Geológica de España, 1995)
Nomarski microscopy has revealed strong zoning in plagioclases of hybrid graitoids of Gerena massif (Seville Range batholith) consisting of oscillatory, hiatus, dendritic and resorption zones which can repeat several times ... -
Estudio de una transversal entre la cuenca de Madrid y la Cordillera Ibérica a partir de datos estructurales, sísmicos y gravimétricos
(Sociedad Geológica de España, 1995)An integrated geophysical and geological study has been carried out along a trasverse extending from the Madrid Basin to the Iberian Range. Geological and seismic reflection data were used as background model for the gravity ...
