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Browsing Geogaceta -- Nº 45, (2008) by Title
Now showing items 1-20 of 28
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Analogue modelling of non-cylindric fold-and-thrust belt around diapirs: preliminary results
(2008)Los modelos analógicos representan una herramienta muy útil para investigar el desarrollo progresivo de cinturones de pliegues y cabalgamientos. En este artículo, se presentan resultados preliminares de una serie de ... -
Aproximación pluridisciplinar en la localización y valoración de sectores de riesgo kárstico. Comparación de métodos de prospección geofísica y geomecánica en los alrededores de Zaragoza
(2008)The study of karst hazards from different methodologies is presented. The application of aerial photography studies, geotechnical approach and geophysical surveys show different results if they are considered in an ... -
Asociación de equinoideos en las calcarenitas messinienses de Alcalá de Guadaíra (Sevilla, SO España)
(2008)The echinoid assemblage from the Messinian calcarenitic deposits of Alcalá de Guadaíra (Sevilla, SW Spain) has been studied. Six species have been recognised; Schizechinus duciei and Plagiobrissus costae are rather common. ... -
Contenidos de CaCO3 en facies turbidíticas y presencia de celestita diagenética en el Maastrichtiense inferior (Sopelana, Arco Vasco)
(2008)The westernmost Sopelana and «Punta de Solondotas» sea-cliff sections exposes a marl-limestone alternation distorted by thin turbidite layers, from the Lower Maastrichtian of the deep Basque Arc domain. High-resolution ... -
Correlación no lineal entre la susceptibilidad media, la contribución paramagnética a la susceptibilidad y la litología en el sector centro-occidental del Pirineo Central. Implicaciones para los estudios de ASM
(2008)The magnetic susceptibility studies and its application to the fabric studies depend on the mineralogical susceptibility sources. The mineralogical characterization of ferromagnetic phases has been developed parallel to ... -
Discriminating Variscan and Alpine deformation in the Eastern Pyrenees. Insight from an AMS study in the Sant Llorenç-La Jonquera pluton
(2008)Las fábricas anisótropas magmáticas en el plutón de Sant Llorenç-La Jonquera, determinadas mediante la técnica de la anisotropía de la susceptibilidad magnética (ASM), presentan una dirección predominante NE-SW y responden ... -
Distribución de Mg en conchas de Crassostrea gigas : control microestructural y correlaciones cristaloquímicas
(Universidad de Huelva, 2008)The realization of geochemical studies on the right valve of Crassostrea gigas's shells has allowed demonstrating a microestructural control on the concentration of Mg. The transects studied in this work show that the ratio ... -
Edad U/Th de los travertinos de Beni Younech y correlación con las terrazas marinas cuaternarias de Ras Leona (SE del Estrecho de Gibraltar, Marruecos)
(2008)Three travertinic levels have been identified in the Beni Younech village, near the Quaternary marine terraces of Ras Leona Point, in the south-eastern coast of the Gibraltar Strait. These travertines developed probably ... -
Emplazamiento y deformación de diques con morfología zig-zag en rocas bandeadas y foliadas
(2008)A rather common feature of dykes intruded in banded and/or foliated rocks is their non-planar shape. This study describes the characteristics of zig-zagging magmatic dykes that occur in the Rainy Lake area of the Canadian ... -
Estructura del complejo alcalino de Rangel (Salta, Argentina)
(2008)This work deals with the structure and emplacement of the alkaline complex of the Sierra de Rangel, a Cretaceous stock intruding in Ordovician metamorphic rocks of the Puna region at Salta, northwest Argentina. Field ... -
Evolución térmica de distintas masas de agua a lo largo del estadio isotópico marino 7 basada en el Mg/Ca de la concha de los foraminíferos planctónicos
(2008)Mg/Ca measurements have been performed on tests from the planktonic foraminifers Globigerinoides ruber (white) and Globigerina bulloides in samples from ODP site 977A in the Alboran Sea (Western Mediterranean) in order ... -
Fábricas sin-metamórficas, mecanismos y régimen de la deformación en las granulitas de alta presión de Cabo Ortegal (NO de España)
(2008)High-pressure granulitic tectonites from shear zones at the contacts between the Bacariza Formation and its bounding units developed after eo-Hercynian subduction, during the initial exhumation of the Cabo Ortegal complex. ... -
Factores que controlan la relación Sr/Ca en foraminíferos planctónicos y su repercusión en las reconstrucciones de paleotemperaturas basadas en corales
(2008)Samples from core ODP site 977, retrieved in the Alboran Sea (Western Mediterranean Sea), have been studied in order to better constrain the factors controlling the Sr/Ca ratio in planktonic foraminifers. For this purpose, ... -
Geocronología de la sucesión arqueoestratigráfica de Los Estragales en la Terraza Compleja de Butarque (Valle del río Manzanares, Madrid)
(2008)In the low valley of Manzanares river, south of Madrid, is located the Butarque Complex Terrace formed by piling up of alluvial deposits of the Upper Pleistocene. In Perales del Río they have been excavated and picked ... -
Influencia de la batimetría y tipo de sedimento en la distribución de la microfauna (foraminíferos bentónicos y ostrácodos) en la plataforma marina vasca
(2008)In this work we describe the microfaunal bathymetrical distribution (foraminifers and ostracods) in the benthos of the Basque continental shelf, by studying the spatial distribution of assemblages. This distribution is ... -
La fauna de vertebrados del yacimiento Holoceno (Aziliense) de Aizkoltxo (Mendaro, Gipuzkoa)
(2008)During the excavation of the Azilian levels from the site of Aizkoltzo in 2003 several vertebrate remains were found. Mammal species are represented in the site by, five rodents, two insectivores, five artiodactyls and ... -
Lucien Cayeux (1864-1944): un ilustre precursor en la enseñanza de la Petrología Sedimentaria
(2008)Lucien Cayeux (1864-1944) was a crucial scientific figure in France during a particularly hard time in Europe owing to the two World Wars and the social and economic crisis. His ideas about the relevance of sediments and ... -
The Mendiurkullu Member of the Lareo Formation: a deltaestuarine progradational system from the Etxegarate trough (Early Aptian western Aralar Mountains)
(2008)Se describe e interpreta el miembro areniscoso y lutítico de Mendiurkullu dentro de la Formación Lareo, en el oeste del macizo montañoso Vasco-Cantábrico de Aralar (Navarra). Contiene arcillas, limolitas y areniscas finas ... -
Morfoestratigrafía y cronología de registros fluviales del Pleistoceno superior en Bardenas Reales de Navarra: implicaciones paleoambientales
(2008)Quaternary gravel deposits covering the bottom of the Bardena Blanca depression (Central Ebro Basin, Navarra) have been studied. Three Late Pleistocene units (Qt1, Qt2 and Qt3) of gravel accumulation have been differentiated ... -
Nuevos restos de ornitópodo (Ornithischia: Ankylopollexia) del Jurásico Superior de Tazones, Asturias (Formación Tereñes)
(2008)Two dorsal vertebral centra of an ornithopod dinosaur from the Late Jurassic of the Principality of Asturias (north Spain) are described. They come from an outcrop of the Tereñes Formation (Kimmeridgian) at Tazones harbour ...
