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Browsing Geogaceta -- Nº 40, (2006) by Issue Date
Now showing items 1-20 of 79
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Influencia de la anisotropía en las propiedades hídricas de rocas. Estudio de rocas dolomíticas brechoides de la Cordillera Bética (España)
(2006)The purpose of this study is to determine the influence of anisotropy on hydrical properties of brecciated dolostones (BD). The present investigation involving BD has revealed, on the one hand, at meso-scale, four types ... -
Presencia de Mammuthus sp. en Caravaca (Murcia)
(2006)In Rambla del Pizcalejo (Caravaca, Murcia, Spain) new Proboscidea fossil remains were found. In this paper are described all postcranial bones belonging to a 2-4 years old Mammuthus. Stratigraphycal and mollusc data ... -
Primeros resultados de huellas de fisión en apatito en el sector Lugo-Ancares (Noroeste de la Península Ibérica)
(2006)The Northwest of the Iberian Peninsula is characterised by the absence of Mesozoic sedimentary deposits, the Cenozoic sediments being scarce. Due to that, the chronology of the geological events in the area is difficult ... -
Estructura y paleogeografía de los materiales del Triásico en la terminación meridional del Arco de Cazorla (Jaén, Cordillera Bética): Implicaciones tectónicas
(2006)This study proposes a tectonic reinterpretation of the southwest end of the Cazorla Arc from two different points of view never used before in external zones of the Betic Cordillera: the paleogeographic study of the ... -
Geología y estructura de la Mina de Río Tinto (Faja Pirítica Ibérica, España)
(2006)The Rio Tinto mining district is regarded as the largest volcanogenic massive sulphide district worldwide, but its geologic and structural setting remains poorly disclosed. The mineralized sequence includes a lower unit ... -
Microestructuras, luminiscencia y geoquímica en Crassostrea sp. de la Formación Zufía, Navarra (Albiense superior-Cenomaniense inferior). Parte I
(2006)Shells of the oyster Crassostrea sp. from the Zufia Formation, deposited in a strongly subsiding basin at the end of the Albian, show the same microstructures than recent and fossil Crassostrea sp., deposited in other less ... -
La transversal de Gavarnie-Guara. Estructura y edad de los mantos de Gavarnie, Guara-Gèdre y Guarga (Pirineo centro-occidental)
(2006)The structure of the eastern extreme of the Jaca Basin is defined by the Gavarnie, Guara-Gèdre and Guarga thrust sheets. The Guara-Gèdre thrust was active during mid Luttetian-earliest Chattian and the Gavarnie thrust, ... -
Mapa de esfuerzos de Europa a partir de Mecanismos Focales calculados desde el Tensor de Momento Sísmico
(2006)This work shows a new stress map for Europe obtained from the inversion of earthquakes focal mechanisms calculated with the centroid tensor method (Dzieownski et al., 1982). An amount of 1608 focal mechanisms have been ... -
Morfología de circones vs. filiación geoquímica de rocas metavolcánicas en el Antiforme del Narcea (N de España)
(2006)In the Narcea Antiform, both Ediacaran upper volcanic series and volcanic clasts in the overlying Cambrian micro-conglomerates, show geochemistry between those of calc-alkaline and alkaline series in the TAS diagram, and ... -
Modelo gravimétrico tridimensional del “stock” de Aguablanca (Badajoz)
(2006)The Aguablanca stock is located in the NE zone of the Santa Olalla Igneous Complex, in the Ossa-Morena Zone. Paleozoic rocks of the Bodonal-Cala Complex and Santa Olalla tonalites bound this gabbronorite stock. This rock ... -
Modelos de abanicos aluviales en los materiales cantabrienses (Grupo Cea) del Manto del Esla, Cordillera Cantábrica
(2006)The main aim of this paper is to describe two alluvial fan models that have been generated in the Esla Nappe of the Cantabrian Zone during the lower Stephanian. These models have been named Duerna alluvial fan and Peña ... -
Perfiles geoquímicos y luminiscencia en las cámaras y concha de Crassostrea sp. de la Formación Zufía, Navarra (Albiense superior-Cenomaniense inferior). Parte II
(2006)Shells of the oyster Crassostrea sp. from the Zufia Formation show chambers filled with different diagenetic carbonates that record a complex diagenetic history. Evidences of «burial» diagenesis, represented by the formation ... -
Historia del levantamiento tectónico de la Sierra de Cameros (Cordillera Ibérica, España): restricciones en base a cronología mediante huellas de fisión y (U-Th)/He en apatitos
(2006)In this work, we present new fission track and (U-Th)/He data of in apatites in order to reconstruct the exhumation of Sierra de Cameros, in the northwestern part of Iberian Range (Spain). Apatite fission track (AFT) ... -
Caracterización geológica de los afloramientos de El Pimpollar, extremo nororiental de la Zona Surportuguesa
(2006)Two volcanic units can be distinguished in the “El Pimpollar” outcrop (eastern South-Portuguese Zone). The Lower Unit is composed mainly of submarine dacites and andesites, with some subordinated basalts and trachyandesites. ... -
Aplicaciones geotermobarométricas de los contenidos en elementos trazas de minerales granulíticos: Zr en rutilo y HREE en granate de los xenolitos félsicos de la corteza inferior del Sistema Central Español
(2006)Geothermobarometric estimations based on the trace element concentration of minerals from lower crustal peraluminous felsic granulite xenoliths from the Spanish Central System (SCS) have been performed. Zr in rutile ... -
Clasificación geomecánica de macizos pizarrosos en el sinclinal de Truchas
(2006)Rock mass characterization and classification are significant in geological investigations involving engineering works and in the field of applied geology. Discontinuities characterization and rock properties determination are ... -
Estudio geométrico comparativo de pliegues asociados a la propagación y terminación lateral de cabalgamientos
This work examines the geometry of two examples of fault-propagation folds related to the lateral termination of thrusts. In spite of their differences in age (Variscan and Alpine) and composition of the involved ... -
Origen de las simas de Partagat (Sierra de Aitana, Alicante)
(2006)The Partagat chasms, located at the highest part of the Sierra de Aitana (Province of Alicante), are large joints which have opened up in Eocene limestone. They measure up to 15-20 metres in width and dozens of metres ... -
Contribución del estudio estructural del enjambre de diques básicos del Precámbrico del Anti-Atlas al conocimiento de su significación geotectónica en la orogenia panafricana
(2006)The Precambrian inliers in the Anti-Atlas of Morocco are extensively intruded by swarms of dolerite dykes. On the basis of detail analysis of foliation patterns around dykes from Kerdous and Zenaga inliers it is inferred ... -
Primeras icnitas de dinosaurio en sur del Alto Atlas Central. Carixiense (Formación de Arhbalou. Goulmima. Marruecos)
(Sociedad Geológica de España, 2006)The first found tracks of dinosaur in the North of the Goulmima-Tinerhir line (Inner Haut Atlas Central, Morocco) are described. They are located in the Arhbalou Formation and come from isolated and grouped prints mainly ...
