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Browsing Geogaceta -- Nº 32, (2002) by Title
Now showing items 1-20 of 81
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Acreción de Terrenos Precámbricos y Coberteras Posacrecionarias en el Macizo Ibérico (España y Portugal)
(Sociedad Geológica de España, 2002)The Iberian Massif shows the existence of four tectonostratigraphic terranes of Precambrian age which have been accreted in two different orogenic periods and sealed by overstepping successions which have been masked by ... -
Algunas pautas del comportamiento hidrogeológico de rocas duras afectadas por glaciarismo y periglaciarismo en Sierra Nevada (España)
(Sociedad Geológica de España, 2002)We discuss the hydrogeologic behaviour of metamorphic schist materials affected by quaternary glacial and periglacial processes. The field study was carried out in the upper part of Sierra Nevada (Spain), in the basins of ... -
Aportes de sedimentos a embalses y tasas de erosión en distintos sectores de la cuenca del Ebro
(Sociedad Geológica de España, 2002)Sediment yield at some reservoirs in the Ebro river basin have been determined by means of bathymmetrical and sedimentological surveys. The studied reservoirs account for more than 80% of the surface of the Ebro Basin. ... -
The Argentine Frontal Cordillera between 30° OO'and 31° 30'S latitude: polycyclic structure and tectonic evolution
(Sociedad Geológica de España, 2002)En el sector de la Cordillera Frontal Argentina comprendido entre los 30° y 31° 30' de latitud S, se diferencian dos conjuntos de rocas con naturaleza y estructuración diferentes: un substrato paleozoico y una cobertera ... -
Características geomorfológicas del sistema dunar de la Bahía de Alcudia (isla de Mallorca)
(Sociedad Geológica de España, 2002)The dunar system of the Alcudia Bay (Mallorca, Spain), organized into simple parabolic to compound complexes parabolic dunes from a predominant southward wind direction, can be divided in two areas of different parabolic ... -
Características geomorfológicas y procesos de vertiente asociados a cuencas diferentes: el ejemplo de Mallorca
(Sociedad Geológica de España, 2002)This paper compares the different geomorphological processes occuring during Pliocene-Quaternary times on two very similar slopes in Mallorca, one located in the Tramuntana Range and the other in the Llevant Ranges. Both ... -
Características morfosedimentarías de las playas de la Ría de Vigo: influencia de las condiciones hidrodinámicas
(Sociedad Geológica de España, 2002)Morphological and sedimentary field data were collected in fourteen beaches of both sides of the Ria de Vigo. A profile was surveyed in each beach and two surface sediment samples were taken at the supratidal and intertidal ... -
Caracterización de los materiales volcánicos asociados a las erupciones holocenas de La Caldera de Pinos de Gáldar y edificios volcánicos adyacentes (Gran Canaria)
(Sociedad Geológica de España, 2002)The holocene eruption of La Caldera de Pinos de Gaidar (2,830 years b.p.) is characterized by an strombolian cone, several lava flows of basanite composition and fall pyroclastic deposits. This volcano and other neighbour ... -
Carbonífero superior en la Cordillera Frontal (Provincia de San Juan, Argentina): características e implicaciones regionales
(Sociedad Geológica de España, 2002)Previous dating of the limestones at the upper part of the Agua Negra in the Quebrada de las Ánimas provided an unconclussive age of Silurian-Devonian. A palynological analysis has been carried out with the aim of improving ... -
Cartografía geofísica y caracterización geoquímica del Complejo Plutónico de Valencia del Ventoso
(Sociedad Geológica de España, 2002)The Valencia del Ventoso Massif is a plutonic complex that consists of different intrusive units whose compositions extend from gabbros to monzogranites. The main lithologic units display a zoned distribution whose geometry ... -
Catodoluminiscencia y diagénesis en conchas de rudistas (Bivalvia) del Cretácico Superior de Gredilla de Sedaño (Norte de Burgos, España)
(Sociedad Geológica de España, 2002)The Quintanaloma Fm (Campanian-Maastrichtian) was deposited in a shallow marine environment and contains a lot of rudist shells (Hippuritidae and Radiolitidae), some of them in life position. From a diagenetic point of ... -
Ciclos de precesión en el Toarciense de la Cuenca VascoCantábrica
(Sociedad Geológica de España, 2002)High-frequency Milankovitch cycles have been identified in the Liassic hemipelagic carbonates of the Basque-Cantabrian basin. The cycles detected are attributed to precession forcing. VVe examined this high frequency cycling ... -
Comparación de Metodologías de Cartografía en la Microzonación Sísmica
(Sociedad Geológica de España, 2002)Seismic Microzonation maps deals with the characterisation of the seismic risks at any of its items, hazards, vulnerability and the risk itself. In this work we are introducing focuses of two main targets, several microzonation ... -
Consecuencias hidrogeológicas del cese de actividades mineras. El caso del "socavón general de desagüe" de Linares (Jaén)
(Sociedad Geológica de España, 2002)The general drainage gallery of the Linares mining district was designed to minimize elevation cost from dewatering the deepest levels of the underground works. Following the mining closure and the flooding of the mining ... -
Cordierite: thermodynamic liquidus phase in peraluminous systems?
García Moreno, Olga; Corretgé Castañón, Luis Guillermo; Castro Dorado, Antonio
(Sociedad Geológica de España, 2002)
Phase relations in the haplogranitic system have been broadly experimentally studied, but there is still an open field of discussion in experimental petrology concerning phase relations in natural granitic systems, Among ... -
Coronitic metagabbros from the Sobrado Unit (Órdenes Complex, NW Iberian Massif). I: Geological setting and mineral assemblages
(Sociedad Geológica de España, 2002)HP-HT unit exposed in the core of the Sobrado tectonic window (Órdenes Complex, NW Iberian Massif) contains a lithological ensemble of arc affinity, affected by Lower Ordovician metamorphism and which reached highest ... -
Coronitic metagabbros from the Sobrado Unit (Órdenes Complex, NW Iberian Massif). II: Thermobarometry and P-T path
(Sociedad Geológica de España, 2002)Three types of corona textures developed in metagabbros of the Sobrado Unit. Detailed thermobarometry, carried out in groups II and III coronas, together with inferred P-T conditions for group I coronas, show that the ... -
Datación palinoestratigráfica del volcanismo en la sección de la Ribera del jarama (Faja Pirítica Ibérica, Zona Surportuguesa)
(Sociedad Geológica de España, 2002)The levels of black slates that appear through the whole series of volcanic materials, have been revealed as a high-priority objective when carrying out studies detailed in the IPB, since they are constituted as a good ... -
Deformaciones tectónicas desde el Tortoniense en el Campo de Dalias (Cordilleras Béticas)
(Sociedad Geológica de España, 2002)The Campo de Dalias is an emerged zone located at the northern boundary of Alboran Sea. The Neogene-Quaternary sediments of the Campo de Daifas are deformed by E-W open folds that also uplift Sierra de Cádor. The field ... -
Depósitos de tsunami en el valle de Agaete, Gran Canaria (Islas Canarias)
(Sociedad Geológica de España, 2002)Pleistocene marine conglomerates, first interpreted as alluvial-marine deposits, are attached to the walls of the valley of Agaete (NW of Gran Canaria), at 50-110 m above sea level. The deposits are 1 to 5 m thick, ...
