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Browsing Geogaceta -- Nº 28, (1999) by Issue Date
Now showing items 1-20 of 38
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El complejo arrecifal del Mioceno superior de Tazouta (SE de Fez, Marruecos): Paleontología, paleoambientes y paleogeografía
(Sociedad Geológica de España, 1999)An analysis based on the study of corals, coralline algae, accompanying fauna and microfacies allowed to define, in the Tazouta reef complexe (south east of Fes; Morocco), a marine platform characterized by a varied and ... -
Caracterización morfosedimentaria de la llanura costera entre el río Paraná Guazú y las localidades de Ibicuy y Gualeguay. Provincia de Entre Ríos, Argentina
(Sociedad Geológica de España, 1999)The Paraná River in terms of length and water discharge is the second after the Amazon in South America, and it generates a large delta when it reaches the Rio de La Plata estuary. It is possible to differentiate a number ... -
Geometría del granito de La Bazana a partir de datos gravimétricos (Zona de Ossa-Morena, Macizo Ibérico)
(Sociedad Geológica de España, 1999)The La Bazana granite is a small intrusive pluton located at the hinge of a symmetrical late Variscan antiform. This granite intrudes essentially in Cambrian metapelites and metasammites of the Ossa-Morena Zone. The attitude ... -
El granito Precambrico deValsequillo (zona de Ossa-Morena, Macizo Iberico, España)
(Sociedad Geológica de España, 1999)The Valsequillo granite is situated in the Peraleda de Zaucejo antiform (Obejo-Valsequillo-Puebla de la Reina Domain) at the northern Ossa-Morena Zone. This antiform is defined by Armorican Quartzite and Devonian rocks. ... -
Análisis de la deformación de los sistemas de venas y filones hidrotermales de la Península Hurd (Isla Livingston, Antártida Occidental)
(Sociedad Geológica de España, 1999)In Hurd Peninsula (Livingston Island, Western Antarctica) has been analysed the orientation of calcite c-axes and e-twin from the sparitic grains that filled the hydrothermal veins and lodes in this region. The c-axes ... -
Cuarzo idiomorfo detrítico en la base del Cretácico Superior de la Depresión Intermedia (Navarra): implicaciones paleogeográficas
(Sociedad Geológica de España, 1999)In the southern border of the Bortzirí (Cinco Villas) Palaeozoic massif (Basque Pyrenees, Navarra) a narrow Alpine syncline known as the Central Depression consists mainly of Upper Ctreaceous calcareous flysch sediments. ... -
Cronologia glaciar Pleistocena del NW de la Peninsula Iberica mediante 21 Ne cosmogenico en cuarzo
(Sociedad Geológica de España, 1999)Late Pleistocene glaciations in the NW Iberian Peninsula over Serra de Queixa and Serra de Xurés, all with granite substrata, were studied by mass spectrometry using cosmogenic 21 Ne. Rock cores were drilled in glacial ... -
Un nuevo yacimiento jurásico con icnitas saurópodas en la Cordillera Ibérica. Calve (Teruel)
(Sociedad Geológica de España, 1999)This paper describes a new dinosaur footprint site found in Galve, Teruel. It is located in the transition zone between the Higueruelas and Villar del Arzobispo formations. According to geological studies, the Higueruelas ... -
Datos preliminares sobre la fauna de vertebrados (Pisces) del Devónico Inferior de Nigüella (Cadenas Ibéricas)
(Sociedad Geológica de España, 1999)Two sections at Nigüella (IberianChains) have provided a rich and varied Lochkovian and Pragian (Early Devonian) fish microremais association. The outstanding occurrence of two levels loaded with fish remains braking the ... -
Análisis multivariable aplicado a datos hidmquimicos de las zonas húmedas de la provincia de Malaga
(Sociedad Geológica de España, 1999)In the province of Málaga there exist a series of wetlands which are protected as Natural Reserves. The management and conservation of these small lakes should be made according to scientific criteria instead of political ... -
Cronología de la transgresión holocena en la Ria de Foz, (Lugo, Galicia, España)
(Sociedad Geológica de España, 1999)The Flandrian or postglaciar transgression in the coast of Galicia, (NW of Spain), caused the flood of the final parts of the Atlantic Galician river systems with the consequent formation of the Galician Rías. The advance ... -
Características de los depósitos de la laguna de La Ratosa (Málaga)
(Sociedad Geológica de España, 1999)The genesis of the La Ratosa lake (N of Málaga, Spain) can be related to the karstification of the evaporite-bearing triassic substratum. It presents a flooding regime typically seasonal. The clastic deposits on the lake ... -
Existencia de una discordancia angular con laguna de Albiense medio en el Complejo Urgoniano de Ranero (Ramales-Karrantza, región vasco-cantábrica)
(Sociedad Geológica de España, 1999)The Albian carbonate platform of Karrantza (Bizkaia, N Spain) displays an important angular unconformity whose corresponding lacuna encompasses most of the middle Albian and the lowermost part of the upper Albian. This ... -
El abanico aluvial del Pilcomayo, Chaco (Argentina - Bolivia -Paraguay): características y significado sedimentario
(Sociedad Geológica de España, 1999)The Pilcomayo river begins in the Bolivian Andes and flows eastwards across the Chaco region, for 1,100 km before joining the Paraguay river. Today this river marks the border between Argentina and Paraguay. It is a typical ... -
Nuevas acotaciones al alcance del método de datación por análisis de racemización de aminoácidos. Sección de Cuesta Colorada (Almería SE de España)
(Sociedad Geológica de España, 1999)New data about the age of Cuesta Colorada (Almería, Spain) are presented. Evidency from micropaleontological sampling and new palaeomagnetical studies, allowed us to correlate the almost whole section with the I and II ... -
Petrografía, procedencia y alterabilidad del material pétreo utilizado en la construcción del Monasterio de San Millán de la CogoIIa, Yuso (s.XVI-XVIl), La Rioja
(Sociedad Geológica de España, 1999)A catalogue of the stone material employed for the construction of the San Millán de la CogoIIa Monastery (Yuso) has been undertaken. The characterization of the rocks has enabled us to explain the provenance of the most ... -
Materia orgánica y diagénesis de la formación de margas del Mas d'Ascla (Jurásico superior) en la cuenca del Maestrazgo (Cadena Ibérica oriental)
(Sociedad Geológica de España, 1999)The Mas d'Ascla marls Fm. (Upper Kimmeridgian to lowermost Tithonian) in the Maestrat Basin (Salzedella sub-basin, Castellò de la Plana) displays two organic-carbon-rich horizons which indicate anoxic conditions. The maximum ... -
Tectónica extensional en el Sistema Central: La Zona de Cizalla Dúctil de Santa María de la Alameda (Madrid)
(Sociedad Geológica de España, 1999)The Santa Maria de Alameda (Madrid) Ductile Shear Zone is a complex mylonitic belt trending east -West and dipping 30°-60° southward. The hanging wall block sinks towards the South-Southeast. Its kinematics is in relation ... -
Datación de yacimientos paleontológicos de la cuenca de Guadix-Baza (sector de Cúllar-Baza, Granada, España) y primera estimación de la edad de la apertura de la cuenca mediante el método de racemización de aminoácidos
(Sociedad Geológica de España, 1999)New amino acid racemization dating data from four Guadix-Baza basin (Cullar-Baza area) localities are presented. The former mathematical algorithms were improved to new ones based oh palaeomagnetical data from the ... -
Dinámica litoral y erosión en la ría de El Barquero: factores antrópicos y procesos naturales
(Sociedad Geológica de España, 1999)The Ria of El Barquero, in the north-western coast of Spain, has only recently been altered by anthropogenic structures, so that effects of such interferences in the natural dynamic processes of the coast are in some way ...
