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Browsing Geogaceta -- Nº 14, (1993) by Title
Now showing items 31-47 of 47
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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 ... -
Nota sobre las plantas fósiles del Mioceno de Epila (Zaragoza)
(Sociedad Geológica de España, 1993)Fossil plants from Epila village (Zaragoza province) at the Ebro Depression are described. Osmunda parschlugiana, Sabalites and undetermined monocotyledoneous are found in travertinic limestone of a supposed Lower-Middle ... -
Nuevos datos sobre comprensión pleistocena en el extremo oriental del Algarve (Portugal)
Flores Hurtado, Enrique; Rodríguez Vidal, Joaquín
; Cáceres Puro, Luis Miguel (Sociedad Geológica de España, 1993)
The end of the Pliocene was characterized by a return to the compressive regime throughout the southern of the Iberian peninsula. Quaternary deformations are intense in places and correspond to folds and occasionally ... -
Los Orbitolínidos de las Calizas de Aras de Alpuente (Albense superior) en la región de Requena (Cordillera Ibérica, Valencia)
(Sociedad Geológica de España, 1993)The Orbitolinids are studied in five Upper Albian sections composed by neritic carbonates. Their sequential correlation allow the biostratigraphic characterization of the parasequences and the elaboration of a stratigraphic ... -
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 ... -
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, ... -
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 Cloritoide en las pizarras ordovícicas del sinforme de Alcañices (Zamora)
(Sociedad Geológica de España, 1993)In the present work we describe for the first time the presence of chloritoid associated with slates of Llanvirn-Llandellian age (Latedo Formation) o f the southern flank of the Alcahices Synform (Zamora). Usually this ... -
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 ... -
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 ... -
Rasgos generales del relieve en el sector suroriental de la Sierra Almijara (Málaga)
Rodríguez Vidal, Joaquín; Cáceres Puro, Luis Miguel (Sociedad Geológica de España, 1993)
The morphostructural landform o f this Betics coastal sector is conditioned by lithological, structural (Neotectonics) and geomorphologicai features. Tortonian planated relief was faulting during Mio-Pliocene age by a NW-SE ... -
Relaciones entre la diagénesis orgánica y mineral en rocas madre de cuencas lacustres: cuenca terciaria de Ribesalbes
(Sociedad Geológica de España, 1993)Lacustrine carbonate sediments from the Tertiary Basin of Ribesalbes (Castellón, Spain) were studied with the aim of determining the relationships between organic and mineral diagenesis. Petrological and geochemical data ... -
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 ... -
El sistema NW-SE de fosas de Rosas y Bagur (margen continental nororiental de España)
(Sociedad Geológica de España, 1993)An analysis ofmultichanell seismic profiles leads to define the main fracture zones in the northeastern continental margin of Spain. Two fault systems have been mapped: I) NE-SW to N-S that defines a classical extensional ... -
Sobre la hidroquímica de la cuenca del río Almanzora (Almería)
Castillo, A.; Vallejos, Ángela; Cerón García, Juan Carlos (Sociedad Geológica de España, 1993)
The waters of the Almanzora basin have very different chemistry according to the hydrogeological context; the mineralization is between 0,4 and more than 6 g/i; the hydrochemical facies is usually . calcic, bicarbonated ... -
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 ... -
La zona de transición agua dulce-salmuera bajo el borde norte de la laguna salada de Fuente de Piedra (Málaga)
(Sociedad Geológica de España, 1993)The results of temperature and electrical conductivit y logs carrie dout in some recently drilled boreholes across the northern shoreline of the Fuente de Pledra Salt Lake, provid e the first data a bout a relative lythick ...
