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Browsing Geogaceta -- Nº 14, (1993) by Issue Date
Now showing items 1-20 of 45
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Estructuración sedimentaria de los cuerpos deltaicos holocenos del margen septentrional del mar de Alborán
(Sociedad Geológica de España, 1993)In three deltaic areas of northem Alboran Sea margin, the different depositional bodies that establish the sedimentary structure of the holocene progradational wedge has been determinated by high resolution seismic profile ... -
Corte balanceado de la Sierra Cantabria (cabalgamiento de la Cuenca Vasco-Cantábrica sobre la Cuenca del Ebro)
(Sociedad Geológica de España, 1993)On the transversal of Puerto de Herrera (Alava), the southern limit of the Basque-Cantabrian basin thrusts on the Ebro basin in favour of two thrusting sequences. The minimum shortening measured exceeds 35% with a 3.25 ... -
Las barras de arena infralitorales del Maresme: formación y cronología
(Sociedad Geológica de España, 1993)Two different types of sand bodies characterize the Maresme Coast (NE Spain). A longshore submarine sand,bar built by theTordera river output is 6 km long and progressively deepens to 8 m depth. Four littoral bar systems ... -
Las pistas fósiles de los anticlinales de Alcudia y Abenójar (Zona Centroibénca). Edad de las series
(Sociedad Geológica de España, 1993)Cambrian-type (Bergaueria and Monomorphichnus) and other trace fossils (Hormosiroidea, Palaeophycus, Phycodes? and Belorhaphe?) are described in theAlcudia and Abenojar anticlines and compared with similar traces by other ... -
Presencia de mineralogías ricas en Zn como evidencias de la actividad hidrotermal enzonas de cizalla extensionales (Complejo Nevado-Filábride, Béticas)
(Sociedad Geológica de España, 1993)Late Zn-rich assemblages have been found in several lithilogies of the Bédar-Macael unit and upper part of the Calar-Alto unit (Nevado-Filabride Complex). The nowadays brittle contacts between the nevado-filábride and ... -
El Terciario de la unidad de Saaden ("Dorsal" externa, Rif Septentrional, Marruecos)
(Sociedad Geológica de España, 1993)In the Saaden unit (External "Limestone Chain", northern Internal Rif), the uppermost Eocene and the Oligocene have been dated by planktonic foraminifera. It confirms that an important transgression accounted during the ... -
Organización secuencial del sector occidental del abanico costero de Sant Llorenç del Munt (Eoceno, cuenca de antepaís surpirenaica)
(Sociedad Geológica de España, 1993)The study of the relationships among facies belts in the Eocene Sant Llorenç d el Munt fan-delta complex allow sus to differentia te three orders of transgressive-regressive cyclicity . The basic building blocks are the ... -
Aplicación del análisis factorial (Modo-Q) a la clasificación de facies detríticas recientes en la plataforma continental de Cádiz
(Sociedad Geológica de España, 1993)The aplication of factor analysis (Q-mode), to surficial non consolidated sediment samples of the northern continental shelf at the Gulf of Cadiz, has allowed to establish simultaneously granulometrlcal and mineralogical ... -
Modelo genético de las secuencias arenosas de plataforma de la Formación Balmaseda (Albiense de la Cuenca Vascocantábrica, N de España)
(Sociedad Geológica de España, 1993)A new palaeoenvironmental interpretation of the Middle Albian-Lower Cenomanian Balmaseda Formation, deposited in SW margin o f the Basque Cantabrian Basin (N Spain) is offered here. According to the facies association, ... -
Los piroxenos de las rocas graníticas de la Sierra de Guadarrama (S.C.E.)
(Sociedad Geológica de España, 1993)The pyroxenes are rarely observed in the granitic rocks from the Sierra de Guadarrama. The clinopyroxene only exists in the basic-intermediate types of cafemic calc-alkaline associations ( El Tiemblo, Almenara, Ventosilla, ... -
Correlación litoestratigráfica de las evaporitas messinienses en las cuencas de Lorca y Fortuna (Murcia)
(Sociedad Geológica de España, 1993)The Messinian evaporite formations of Lorca and Fortuna basins may be linked along the exposures developed in the Guadelentín depression. Accordingly, the La Serrata Gypsum unit of the Lorca basin correlates with the "lower ... -
Sedimentologia del sector occidental del abanico costerò de Sant Llorenf del Munt (Eoceno, cuenca de antepais surpirenaica)
(Sociedad Geológica de España, 1993)The Bartonian-Priabonian Sant Lloreng del Munt fan-delta complex is located at the SE margin of the South-Pyrenean foreland basin. During the deposition of this complex the basin margin was controlled by a series of sinistral ... -
Influencia de las evaporitas de borde en la hidrogeoquímica del acuífero de la Vega de Granada
(Sociedad Geológica de España, 1993)The influence of the input of saltwater on the chemistry of the Vega de Granada aquifer is studied. The three main areas of saltwater pollution are defined in addition to discussing the origin of the different waters -
La desembocadura del río Ebro: variabilidad y cambios recientes
(Sociedad Geológica de España, 1993)Two years (1990/91) surveying the River Ebro Mouth system, has shown the relationship between fluvial dynamics and sedimentary forms. Two main situations,seem to be present: a sand spit during low fluvial regime,, and a ... -
Procesos de sedimentación ligados a flujos gravítacionales en regiones semiáridas. Un ejemplo del SE de España
(Sociedad Geológica de España, 1993)In the studied area the rainfalls ofautum 1973 and 1989 led to the development of gravity flows of mud and/or debris flow type and their characteristic sediments. The analysis of rain fall conditions, processes and deposits ... -
Un borde de plataforma Urgoniana al NE de la provincia de Alicante (zona Prebética)
(Sociedad Geológica de España, 1993)During late Barre mian-early Aptian times, the development of a carbonate platform took place, with deposit of rudistid and corallim estones in NW of Alicante province (SE of Spain). In the Benidoleig-Jalón area, a detailed ... -
Estructura general de la corteza en una transversal del Mar de Alborán a partir de datos de sísmica de refracción-reflexión de gran ángulo. Interpretación geodinámica
(Sociedad Geológica de España, 1993)Results from three seismic refraction/wide-angle reflection profiles across the Alborán Sea outline a general structure of the crust, wich can be related to a detachment, simple shear, model of extension -
Neoformación de fases minerales secundarias ricas en tierras raras en los granitos de la Sierra de Guadarrama: Bastnaesita-(CE)
(Sociedad Geológica de España, 1993)The subsolidus postmagmatic alteration processes in the granites of the Sierra de Guadarrama produce the transformation and neoformation of the principal and accesory phases. One of these secondary minerals is the ... -
Estudio preliminar sobre las facies volcaníclásticas de la Formación Zamoranos (Trías Subbético)
(Sociedad Geológica de España, 1993)In some outcrops o f the Trias o f facies Keuper in the Central Subbetic Zone has been defined the Zamorano Formation, dated as Norian. In this formation is possible to identify conglomerates with pebbles of different ... -
Caracterización geoquímica de los depósitos ferromanganesíferos de Las Herrerías (SE Ibérico)
(Sociedad Geológica de España, 1993)Various types of ferromanganese deposits, of Upper Miocene age, form part of the Las Herrerías mineralization (Betic Cordillera, SE Spain): Oxidized beds, crusts, hydrothermal pipes and brecciatype structures, thin layers ...
