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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 ... -
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 ... -
Estaurolita rica en Zn en las metapelitas de bajo grado de la Unidad de Salobreña (Complejo Alpujárride)
(Sociedad Geológica de España, 1993)Zn-rich staurolite has been found in a metapelite rock with low-grade metamorphic assemblage, in the Salobreña Unit (Alpujárride Complex, Betic Cordillera). The chemical composition (4-6 wt.% ZnO) and the textural relationships ... -
Evolución de la dinámica sedimentaria reciente en la plataforma continental septentrional del Golfo de Cádiz
(Sociedad Geológica de España, 1993)The study of the present granolumetric facies plot of surficial sediment sample and high resolution seismic profile analysis, allow us to establishment the general aspects of the Holocene sediment dynam ic evolution in 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 ... -
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 ... -
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 -
Fallas de despegue extensional miocenas en el área de Sierra Tejeda (Béticas centrales)
Alonso Chaves, Francisco Manuel
; García Dueñas, V.; Orozco, Miguel (Sociedad Geológica de España, 1993)
In the Sierra Tejeda area, NE Malaga, the existence of detachments and low angle normal faults has been recognized. The faults developed during three Miocene extensional events of AquitanianBurdigalian, probably Langhian ... -
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 ... -
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, ... -
Middle Miocene extensional faulting events and Alpujarride Units in the Central Betics
(Sociedad Geológica de España, 1993)In the Central Betics, the Alpujarride Complex is made up of units which result from the dismembering of pre-Miocene fold nappes during a Late Burdigalian (?)-Langhian extensional event -
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 ... -
Mineralogía de los sedimentos de la Laguna de Fuente de Piedra (provincia de Málaga)
(Sociedad Geológica de España, 1993)Sampling of sediments from the Fuente de Piedra playa lake (Málaga province, Spain) has been carried out both in the surface salt crust and in two shallow holes. The following minerals have been mainly indentified: quartz, ... -
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 ... -
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, ... -
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 ... -
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 ... -
La geología marina desde la perspectiva del Instituto Español de Oceanografía
(Sociedad Geológica de España, 1993)The "Instituto Español de Oceanografía" (Spanish Oceanographic Institute) is a body of the "Ministerio de Agricultura, Pesca y Alimentación" (Food and Fisheries Department). It engages in research in many oceanographic ... -
Determinación de velocidades de flujo en acuíferos carbonatados alpujárrides mediante ensayos de dilución
(Sociedad Geológica de España, 1993)We have used the single borehole method for calculating the Darcy velocity in carbonate aquifers of diffuse flow system type. The tests have been based on the labelling of the whole water column in piezometers with a saline ...
