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Browsing Geogaceta -- Nº 20-5, (1996) by Issue Date
Now showing items 1-20 of 69
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Preliminary magnetostratigraphic data of a Tatarian (Upper Permian) section on the Volga river (Russia)
(Sociedad Geológica de España, 1996)A magnetostratigraphic profile of the uppermost Tatarian (Upper Permian) of a section of continental sediments from Eastern Platform is presented. Around 300 samples across an Upper Permian sequence o f red beds Monastirskoje ... -
Magnetoestratigrafía del Neógeno del sector central de la Cuenca del Duero
(Sociedad Geológica de España, 1996)Several biostratigraphic studies have been carried out on lacustrine and fluvial-lacustrine sediments in the neogene Duero Basin, these show that most of the outcrop depositional sequence belongs to the Aragonian - Upper ... -
Resultados paleomagnéticos preliminares en el vulcanismo neógeno de la Sierra de Las Cruces (Valle de México, México)
(Sociedad Geológica de España, 1996)A palaeomagnétic study have been carried out on the western margin of the México basin. 24 sites from Sierra de Las Cruces were sampled and analyzed in the laboratory. A total amount of 237 samples has been fully demagnetized ... -
Un modelo sobre el control orbital de la sedimentación en medios de plataforma: el Albiense-Cenomaniense del Puerto del Remolcador (Maestrazgo, Castellón)
(Sociedad Geológica de España, 1996)There are marry papers dealing with orbital forcing on sedimentation, mainly on deep facies. The study of orbital forcing on platform sediments, however, depends on the development of accurate models, which can be contrasted ... -
Influencia de la vegetación en los procesos de podsolización en los suelos de la Sierra del Moncayo (Zaragoza)
(Sociedad Geológica de España, 1996)In this work we study the effects of vegetation on the formation of Spodosols in the Moncayo Mountains, under mediterranean climate. To do it, we compare two soil profiles located at the same altitude, one under natural ... -
Caracterización geoquímica de partículas sedimentarias en una población urbana e industrial: el caso de Puertollano (Ciudad Real)
(Sociedad Geológica de España, 1996)This study concerns the geochemical characteristics of deposited particles in an urban area -namely the urban area of the mining and industrial city of Puerto llano. This falls with in the context of environmental systems, ... -
Caracterización geológica para el emplazamiento de instalaciones de riesgo
(Sociedad Geológica de España, 1996)Certain installations are devoted to risky activities such as nuclear facilities (power plants, waste repositories), sanitary landfills or some chemical industries. Placing such plants into the land, deserve specific ... -
Deterioro selectivo de la piedra de construcción de la catedral de Palma de Mallorca
(Sociedad Geológica de España, 1996)Palma de Mallorca cathedral (Spain) is built with four types of carbonate rocks (one limestone, one dolomitic limestone and two dolomites). The forms and degree of degradation of these stones depend on their petrophysical ... -
Impacto ambiental de la minería en el devenir histórico de la comarca de Río Tinto (Huelva)
Fernández Caliani, Juan Carlos
; Galán Huertos, Emilio (Sociedad Geológica de España, 1996)
As a consequence of the large mining operations occurred at Rio Tinto area (SW Spain) since prehistoric times, forests were demolished, rivers were polluted by heavy metals, sulphates and suspended particles, air was ... -
Rocas y minerales industriales de Catalunya. Los áridos graníticos y basálticos del ámbito territorial metropolitano. Aspectos S.I.G. del proyecto
(Sociedad Geológica de España, 1996)We show a CIS (Arc-Info) methodology, and the guidelines to build alpha-graphic data bases, which have been used in this project. The main result was to obtain a Map of Suitable Areas, in which different aspects are ... -
Propuesta de un modelo cronológico para las terrazas de los ríos de la vertiente cantábrica
(Sociedad Geológica de España, 1996)A new fluvial terraces chronology Is proposed for the rivers in northern Cantabrian Range. Six terrace levels were identified and mapped. These have average heights of 2,5; 10; 15; 20; 35; and 63 m above river level. Four ... -
Variations in the Mediterranean thermohaline circulation during the Last Glacial/Interglacial transition (20 Ka PB), based on a dinocyst record of the Alboran Sea
(Sociedad Geológica de España, 1996)The dinoflagellate cyst assemblages in a core from the Western Alboran Sea, in the upwelling domain off Malaga, show a record of marine environmental change for the Late Glacial and Holocene periods. The dinocysts are good ... -
Los proyectos de cartografía geológica del Servicio Geológico de Cataluña
(Sociedad Geológica de España, 1996)Since the Gravimetric Map on a scale of 1/500 000 was published in 1987, the Geological Survey of Catalonia (SGC) published in 1989 the Geological and the Aeromagnetic maps on a scale of 1/250 000. The publications of the ... -
Restauración de impactos mineros en zonas semiáridas: el ejemplo de la provincia de Granada
(Sociedad Geológica de España, 1996)Quarries reclamation has been efective since 1982 because of environmental mining laws. Reclamation techniques have been developed quikly during these years. In Grenade province, quarry reclamation is especially dificult ... -
Paleomagnetismo y deformación reciente en la zona interna de las Béticas orientales
(Sociedad Geológica de España, 1996)A paleomagnetic and rockmagnetic study was carried out on rocks from 33 volcanic and 12 sedimentary sites of Serravalian/Tortonian to Pliocene/Quaternary age in the internal zone of the eastern Betic Cordillera. After ... -
Principales impactos antrópicos en la Gruta de las Maravillas (Aracena, Huelva)
(Sociedad Geológica de España, 1996)The cave of Marvels has been the object of a detailed study since 1993 which has allowed us to identify the main effects deriving from tourist visits and human activity on the environment. Although the deterioration is by ... -
Migraciones intercontinentales y eustasia: el datum de Hipparion
(Sociedad Geológica de España, 1996)The magnetostràtigraphic study of vallesian sites in the Vallès-Penedès Basin (NE Spain) provides a reliable dating of the earliest appearance of Hipparion at 11.1 Ma. Good agreement with radiometric ages from other sites ... -
Patología de monumentos por técnicas de proceso digital de imágenes
(Sociedad Geológica de España, 1996)The forms of degradation presented in the “Ermita de la Bureba" are identified and morphologically studied, using digited images. A metodology is proposed in order to discriminate alveolar weathering, striations, disgregations, ... -
Neoformación de sales en la piedra monumental de la Ciudad de Zamora
(Sociedad Geológica de España, 1996)In this paper special focus is placed on the neoformation of salts (gypsum, halite, calcite, dolomite and calcic oxalates) and stone deterioration mechanisms concerning the main historical monuments of Zamora (Spain). ... -
Magnetoestratigrafía preliminar de los materiales pliocenos de la Cubeta de Villarroya. (Sierra de Cameros, La Rioja)
(Sociedad Geológica de España, 1996)In this work we report a magnetostratigraphic study of a Pliocene section at Villarroya basin. The correlation with the Geomagnetic Polarity Time Scale (GPTS) is tied by the existence of a well-defined paleontological ...
