RODRÍGUEZ VIDAL , Joaquín

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U-Series dating method is applied to speleo thems from Los Covachos Cave in the south of Spain. A combination of solvent extraction method with ion exchange resins is used for uranium and thorium isotopes. Uranium concentrations are low and for younger samples correction by detrital contamination is necessary. Ages obtained range from 30 to 135...

The uranium-series method is applied to date relic flowstone from karstic mountains in the south of Spain. Geomorphological mapping shows three staircased erosion surfaces with a typical karst landform. Exhumed flowstones fill the surficial palaeosinkholes and open fractures. Some of the samples analysed were impure carbonates consequently the...

In environmental age dating the 230Th/232Th activity ratio is widely used as an indicator of detrital contamination. A clear relationship between this activity ratio and the carbonate sample's age has previously been demonstrated, whereby a detrital correction must be applied when the 230Th/232Th activity ratio of the leach drops to 20. We...

En este artículo damos a conocer el yacimiento pleistocénico bautizado como Cueva del Grajo II (Priego de Córdoba) tras su descubrimiento casual, en el verano de 2002, durante los trabajos de explotación de una cantera del mismo nombre. En Enero de 2003 se procedió a realizar una actuación en el yacimiento con los objetivos prioritarios de...

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Several sets of staircased Quaternary marine deposits can be observed along the Gibraltar coast ranging from 1 to 210 m above the present mean sea level. Geomorphological mapping establishes, from the relationship between shore, scree and dune sedimentary formations, five main morphotectonic steps on the Rock: marine terraces between 1 and 25...

El estudio de los materiales geológicos y las asociaciones de ostrácodos presentes en un testigo largo obtenido en el sur del Parque Nacional de Doñana (SO de España) permite inferir una evolución paleoambiental desde medios marinos someros (Plioceno Inferior) hasta un lagoon salobre (Pleistoceno Superior-Holoceno) y la implantación de sistemas...

The geomorphological observations made until now reveal a long morphogenic history for the karst of the Eridrinal: mountains; going back to pre-Quaternary times. The erosion surfaces mapped (Sl, S2 and 53) have å biostatic genesis and are linked to humid media with forest cover, favouring carbonation below a karst- cover. The rëlatiônship...

En este trabajo abordamos el análisis geoarqueológico y cronoestratigráfico de los indicios arqueológicos más antiguos de frecuentación humana en el sector occidental de la Bahía de Málaga. Los datos disponibles permiten ubicar dichas evidencias, como mínimo, en momentos plenos del Pleistoceno medio. Asimismo, tratamos aspectos tecnológicos,...

The Last Interglacial is considered the most suitable episode from which to infer patterns of rapid sea-level change since its climatic conditions were similar to those of the present interglacial. However, specifying the true position of its sea level with high accuracy is very troublesome in the absence of sedimentological, erosional or even...

In the Iberian Peninsula the fossil record of artiodactyls spans over 53 million years. During the Pleistocene, wild cattle species such as Bison and especially Bos became common. In Late Pleistocene, the aurochs (Bos primigenius) was widespread and the only bovine living along the large river valleys of southern Iberia. Although commonly found...

Four phases are distinguished in the Late Holocene evolution of the southwestern Doñana National Park (SW Spain), based on a multidisciplinary analysis of the sediments present in drill cores. In the oldest phase (>2400-2500 cal. yr BP), a coastal lagoon (the Roman Lacus Ligustinus) was recognized in the central part of this area, partly closed...

Este trabajo analiza las evidencias morfosedimentarias de dos altas paradas del nivel marino datadas en el MIS 5 mediante series de U en el Norte de Marruecos. Durante el MIS 5a se formaron socaves bioerosivos (notches) y facies de playas de alta energía constituidas por depósitos mixtos siliciclástico-carbonatados. Una altura de 10 m snm ha...