Thesis Collection
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Geogaceta -- Nº 22, (1997)
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Variaciones de la anisotropia de la susceptibilidad magnética en turbiditas albienses de la Cuenca Vasco-Cantábrica
(Sociedad Geológica de España, 1997)The first results extracted from the study of the Anisotropy of magnetic susceptibility (ASM) from 33 turbidites allocated in Basque-Cantabrian basin show the validity of the ASM as a rock fabric analysis tool to determine ... -
Un sistema turbidítico Bartoniense de tipo «channel-levee» en la Cuenca de Pamplona: implicaciones tectónicas y paleogeográficas
(Sociedad Geológica de España, 1997)The Bartonian Ezkaba Sandstone, in the Pamplona Basin,.seems.to represent channel-fill deposits of a laterally migrating ch.annel-levee turbidite.system. Its silicidastic nature and its northern derivation indicate the ... -
Un leopardo, Panthera pardus (Linnaeus, 1758), en el Pleistoceno de la Cueva de los Torrejones (Tamajón, Guadalajara, España)
(Sociedad Geológica de España, 1997)The most complete individual of Panthera pardus (Linnaeus, 7 758) of the Spanish Pleistocene has been found in the Torrejones Cave. The importance of this material stands on two facts: V for the first time in a Spanish ... -
Primera cita del género Capra en el Pleistoceno medio de la Sierra de Atapuerca (Burgos, España)
(Sociedad Geológica de España, 1997)The first caprinae remains found in the Sierra de Atapuerca are described herein. The scarce material comes from the Galería deposit (TC) in the Trinchera del Ferrocarril of Atapuerca (Burgos), of middle Pleistocene age. ... -
Presencia de Marmota marmota en los rellenos kársticos de Atapuerca (Burgos, España)
(Sociedad Geológica de España, 1997)In this work are described the more old fossil record of Marmota marmota of the european Pleistocene, in the levels of Lower Pleistocene (TD6), and Middle Pleistocene (TN4, TD10) from the Trinchera del Ferrocarril of ... -
Moluscos bivalvos de las facies cuarcíticas del Ordovícico Inferior centroibérico
(Sociedad Geológica de España, 1997)Some scarce and bad preserved bivalves have been described from few localities lying at the upper part of the Armorican quartzite facies in Central Spain. Middle Arenig faunas include two palaeotaxodont forms (Praenucula ... -
Modificaciones diagenéticas en nodulos de sílex por influencia de fluidos dolomitizantes: ejemplos en el Cretácico superior de la Región Vasco-Cantábrica
(Sociedad Geológica de España, 1997)Special nodular chert detected in carbonates of the Upper Cretaceous in the Basque-Cantabrian Region was partially or completely modified by diagenesis. Rhombohedral dolomite crystals appear both within the carbonate ... -
Mineralogía de arenas y edad en una secuencia de superficies entre el río Tajo y los Montes de Toledo
(Sociedad Geológica de España, 1997)We study the heavy minerals in the fine sand from Bt horizons of soils developed in a serie of surfaces related to the Tajo river and Los Montes de Toledo. We found a sequence in the weathering degree of the detrital ... -
Los rizolitos de la Fm. Aguilar (Kimmeridgiense-Berriasiense, Palencia, Burgos y Cantabria): caracterización, génesis y significado
(Sociedad Geológica de España, 1997)Four diferents types of rizoliths have been recognized within the alluvio-lacustrine deposits that made up the Aguilar Fm. On the base of their macroscopic and microscopic features and of the sedimentology of the facies ... -
Los micromamíferos del tránsito Pleistoceno inferior-medio de Atapuerca (Burgos,España). Implicaciones bioestratigráficas y evolutivas
(Sociedad Geológica de España, 1997)The micromammals association of the TD5- TD6 levels is exclusive from the karstic complex of Atapuerca (Burgos, Spain). This association is characterized by the presence of arvicolids : Terricola gregaloides, Terricola ... -
Los granates como guía de exploración y materia prima: El ejemplo del Hoyazo de Níjar en el cinturón metalogenético del SE Ibérico
(Sociedad Geológica de España, 1997)A review of the garnet-rich volcanic Complex of El Hoyazo (SE Spain) is given, including new data about the petrology and geochemistry of the volcanic area, and suggesting a methodological proposal for evaluating the use ... -
La sucesión lacustre pliocena de Villarroya (La Rioja). Principales características paleoambientales basadas en ostrácodos y moluscos
(Sociedad Geológica de España, 1997)Two main episodes have been distinguished in the Pliocene lacustrine sequence of Villarroya (La Rioja, Spain) on the basis of the ostracode and mollusc faunal assemblages. The early episode, which corresponds to a relatively ... -
Las estructuras paleokársticas del Monte Baio (Araba/Alava): su relevancia para una evaluación cuantitativa del descenso del nivel marino del Paleoceno medio
(Sociedad Geológica de España, 1997)During the period of sub-aerial exposure subsequent to the mid-Paleocene sea level fall, a set of paleokarstic features were generated in upper Danian lagoonal limestones of the Alava province. The most interesting of them ... -
Trazas de minerales evaporíticos en el Albiense superior de Bi Haizpeak/ Dos Hermanas (Aralar, Nafarroa): implicaciones paleotectónicas
(Sociedad Geológica de España, 1997)Pétrographie analysis of a thin (50 cm) bed from the Upper Albian Bi Haizpeak/Dos Hermanas (Aralar) unit, has shown signs and traces of evaporitic minerals. These features mainly consist of gypsum inclusions, micritic ... -
Tectónica extensional cretácica en la subcuenca de Oliete (Cordillera Ibérica central)
(Sociedad Geológica de España, 1997)The control of the extensional tectonics on the geometry of the Oliete Subbasin during Early Barremian-Basal Aptian (Early Cretaceous) is examinated. Both, the main NW-SE trending of the basin, its asymetrical geometry and ... -
Secuencia evolutiva de los depósitos resedimentados eocenos de Punta Galea, Bizkaia: relevancia para determinación del sentido de transporte en láminas de «slump»
(Sociedad Geológica de España, 1997)The middle Eocene succession of Biscay contains numerous and thick intercalations ofslump-turbidite couplets. They record a simultaneous resedimentation of both deep and shallow water deposits, most probably trigered by ... -
Ramp calcarenite sheet depositional system as a recorder of sea-level fluctuations (Late Albian, Alsasua, Spain)
(Sociedad Geológica de España, 1997)The Albian Aitziber calcarenites (Alsasua, Navarra) are analysed on the basis of their overall geometry, types of limiting boundaries, internal composition, facies, sedimentary structures and paleogeographical context. An ... -
Las asociaciones de foraminíferos bentónicos de la serie margo-diatomítica de Sidi Haj Youssef (Boudinar, Marruecos nord-oriental)
(Sociedad Geológica de España, 1997)The Messinian section of Sidi Haj Youssef (Boudinar basin- NE. Morocco) with alterancy of marl and diatomitic levels, is very rich in benthonic foraminifera and wich are represented by 102 species. The quantitative studies ... -
Las areniscas de la Formación de Gordexola (Albiense, flanco sur del Anticlinorio de Bilbao, Vizcaya) II: Cementación y diagénesis
(Sociedad Geológica de España, 1997)The sandstones of the Gordexola Formation were studied using petrography, cathodoluminescence, electronic microprobe, SEM, and C and O isotopic relations. A diagenetic sequence was inferred from medium to late stages. The ... -
Las areniscas de la Formación de Gordexola (Albiense, flanco sur del Anticlinorio de Bilbao, Vizcaya) I: Composición y procedencia
(Sociedad Geológica de España, 1997)The sandstones of the Gordexola Formation have been petrologically and geochemically studied. The averageofQ(= 57%), FdK+Plag(= 6%) and rock fragments (= 4%) in sandstones was plotted against the Dickinson et al. (1983) ...
