Thesis Collection
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Browsing Geogaceta -- Nº 01, (1986) by Issue Date
Now showing items 1-19 of 19
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Situación estratigráfica de los yacimientos de vertebrados del borde oeste de la depresión de Guadix-Baza (zona de Huélago y Fonelas)
(Sociedad Geológica de España, 1986)The use of paleontologic and sedimentologic-morfologic arguments has allow us to identify four groups of sediments with diverse chronology: —Lower Unit (Upper Ruscinian, Ruscinian-VilIafranchian limit).—Upper Unit ... -
Nuevos datos sobre la fase de deformación sárdica. Geometría de los pliegues pre-hercínicos del río Salor (Cáceres)
(Sociedad Geológica de España, 1986)A study made over some 50 pre-hercinian folds shows how the attitude of their axes are in the NE-SW quadrants, being similar to the attitude of those of the Sardic fase known up to now in the Zona Centroibérica. The exam ... -
Nuevo yacimiento de moluscos fósiles en el Würm de Rubí (Barcelona, España)
(Sociedad Geológica de España, 1986)We describe a new outcrop of the continental molluscs which has been found in the terrace of 10 m in Riera de Rubí. After geographical setting this fauna belongs to Würm and points to a very cold environment -
La zona de cizalla del contacto entre el grupo de mantos del Mulhacén y la unidad del Veleta (Sierra Nevada y Sierra de los Filabres, Andalucía)
(Sociedad Geológica de España, 1986)The existence of an important ductil shear-zone developed in relation with the emplacement of the Mulhacen nappes group on the Veleta Unit (Betic Cordilleras) is manifested. The overlaping in the ENE sense is over 200 km ... -
La zona de falla de Torres Cartas, conjunto de fallas normales de bajo ángulo entre Nevado-Filábrides y Alpujárrides (Sierra Alhamilla, Béticas Orientales)
(Sociedad Geológica de España, 1986)The Torres Cartas Fault Zone is a large low-angle extensional structure, strongly thinning the Nevado-Filabride and Alpujarride nappes. These nappe complexes form the basement of the Alboran sea southwest Sierra Alhamilla. ... -
La estructuración diapírica del Sector Prebético
(Sociedad Geológica de España, 1986)The main structural features of the external and internal Prebetic domains allow its subdividion into three great areas that exhibit an increasing diapiric activity from NNW to SSE. The amount of diapiric structurations ... -
Modelos arrecifales neógenos de la depresión del río Almanzora (Almería)
(Sociedad Geológica de España, 1986)Two models of reef growth are proposed for the Neogene reefs interbedded into the siliciclastic rocks of the narrow, fault-controlled Almanzora Basin: patch reefs on activelyprograding fan deltas (e.g. Purchena and Serón) ... -
Notas preliminares sobre la geomorfología glaciar del Valle de Rongbuk, vertiente norte del Qomolangma (Everest). Tíbet. R. P. China
(Sociedad Geológica de España, 1986)Five major glacial episodes are diferenciated in Rongbuk Valley along the Upper Pleistocene and Holocene, till the Little Ice Age, with the frontal morraines at 5150, 5140, 5075, 4970 and 4.700 meters over sea level -
Evidencia de un fenómeno de autoinversión de la NMR en piroclastos de la erupción de 1985 del volcán Nevado del Ruiz (Colombia)
(Sociedad Geológica de España, 1986)During the catastrophic 13 November 1985 eruption of the Nevado del Ruiz volcano (Colombia), that caused the death of 25000 people and damages assessed at US$ 300 million, several types of pyroclastics were emitted including ... -
Forma y orientación de los enclaves negros en el Sistema Central español
(Sociedad Geológica de España, 1986)Over 1453 black microgranular enclaves (EN) the spatial analysis about their axes orientations and lengths we have determined the existence of a predominant distribution: the minor axis (Z) is quasi vertical position; the ... -
Fábrica de cuarzo y cabalgamientos hacia el ENE en Sierra Nevada y Sierra de los Filabres (Cordilletas Béticas)
(Sociedad Geológica de España, 1986)From microstructures and quartz c-axis fabric analysis the characterization of the «Mulhacen/Veleta ductil shear zone» is made. The existence of important eastward directed thrustings predating the S-N movements is inferred. ... -
Génesis y evolución de la fosa de la Cerdanya (Pirineos Orientales)
(Sociedad Geológica de España, 1986)The Cerdanya basin is located at the SW end of the Tet fault, in its NW block. Its formation, during the Upper Miocene, was conditioned by dextral slip of this fault anf the normal slip of E-W trending faults that absorbed ... -
Petrogénesis de los basaltos alcalinos de La Garrotxa, región volcánica del NE de España
(Sociedad Geológica de España, 1986)Compositional trends and trace elements abundance in leucite-basanites, nepheline basanites and olivine basalts from La Garrotxa (NE Spain region), suggest that the parental magma were originated from an homogeneous ... -
Depositional sedimentary controls on sepiolite occurrence in Paracuellos de Jarama, Madrid basin
(Sociedad Geológica de España, 1986)La presencia de sepiolita en los sedimentos neógenos (Aragoniense medio y superior) aparece ligada a paleoambientes de orla distal en abanicos aluviales. Dentro de ellos la formación de sepiolita tuvo lugar en charcas de ... -
Estudio comparativo de los cuerpos intrusivos básicos asociados a los materiales de edad triásica de los dominios Subbético y Nevado-Filábride del sector Centro-Oriental de las cordilleras béticas
(Sociedad Geológica de España, 1986)The basic intrusive bodies, from both Subbetic and Nevado-FiIábride domains, display analogous geological and petrographic features, as well as Ti, Zr, Y, Nb, trace elements content. All these aspects point to an alkaline ... -
Caracterización de las arcillas por el método del azul de metileno
(Sociedad Geológica de España, 1986)This is a simple method for caracterisation of clays in soils and its relation with consistency limits. It has been checked by X-ray diffraction analysis -
Aplicación de técnicas paleomagnéticas de corto período a la datación del volcanismo subhistórico de la isla de Tenerife
(Sociedad Geológica de España, 1986)The use of short period palaeomagnetic techniques (secular variation and palaeointensities) in studying the recent volcanism of the Canary Islands has permitted us to date seven volcanic eruptions which happened in the ... -
Grandes fallas de contracción y de extensión implicadas en el contacto entre los dominios de Alborán y Sudibérico en el arco de Gibraltar
(Sociedad Geológica de España, 1986)Constitutive units of Alboran and Sudiberic Domains near Gibraltar Arc are specified. The boundary between both domains results from a crustal scale westward transpressive thrust and superimposed Iow angle normal faults ... -
Tectónica alpina y morfogénesis en el Sistema Central español: Modelo de deformación intracontinental distribuida
(Sociedad Geológica de España, 1996)The formation of the Spanish Central System is a adscribed to an intracontinental shear zone whose activity implies rotation of blocks within areas of intense deformation. This model of distributed deformation explains the ...
