Thesis Collection
Last Deposit
Browsing Geogaceta -- Nº 10, (1991) by Issue Date
Now showing items 1-20 of 49
-
Correlación secuencial y sedimentológica entre registros de sondeos y series de superficie del Jurásico Marino de la Cuenca de Santander (Cantabria, Palencia y Burgos)
(Sociedad Geológica de España, 1991)A seismic scale cross-section of the Marine Jurassic of the Santander Basin (Lias and Dogger, western part ofthe Basque-Cantabrian Region, north Spain) is reconstructed based on both outcrop and well log data. It demostrates ... -
Superposición de estructuras hercinianas en el sector de Buitrago-Somosierra (Sierra del Guadarrama, Sistema Central)
(Sociedad Geológica de España, 1991)The Preordovician rocks of the Buitrago-Somosierra area have undergone three penetrative phases of Hercynian deformation. The phases 1 & 2 are of tangential character, F1 probably generates a recumbent syncline Eastern ... -
Sobre la posición estratigráfica de Perisphinctes wartae Bukowski y el desarrollo de la Subbiozona Rotoides (Biozona Transversarium, Oxfordiense Medio) en la Cordillera Ibérica Nororiental
(Sociedad Geológica de España, 1991)The new, recently defined biostratigraphic unit Rotoides Subzone has been widely recognised throughout the Iberian Chain (E. Spain) and characterized by means of successive representatives of Oxfordian ammonite genus ... -
Significado estratigráfico de dos alteraciones en el Mioceno superior de la Cuenca del Duero
(Sociedad Geológica de España, 1991)Analysis was made of two alterations located within and on the top of the Late Miocene in the central-eastern region of the Duero Basin. Questions arising about their stratigraphic significance are also approached. The ... -
Rasgos erosivos y deposicionales en la zona proximal de un «Slope-Apron» carbonatado del Paleoceno Inferior (Eibar, Cuenca vasca)
(Sociedad Geológica de España, 1991)An 1.5 km wide section of the proximal part of a Paleocene carbonate slope-apron system has been reconstructed through the correlation of 10 columnar sections. lt is oriented perpendicular to the general paleocurrents and ... -
Regionalización de la precipitación en el País Vasco: Aplicación del modelo de análisis regional de lluvias
(Sociedad Geológica de España, 1991)The heterogeneity of the rainfall in a region is known, which lets distinguish different zones by their rainfall characteristics. In the Basque Country two zones can be distinguished: the Cantabric and the Mediterranean ... -
Un ejemplo de paleocaverna con relleno calizo brechoide (Punta Arenillas, Albiense inferior, Cantabria)
(Sociedad Geológica de España, 1991)The Lower Albian pimacle platform of Arenillas in Castro-Urdiales (Cantabria, northern Spain) shows a paleocavern about 120 m long and 40 m high, whose base is 60 m below an unconformity. This vadose structure is infilled ... -
Secuencia estratigráfica y análisis de facies del Mioceno entre Elche y Crevillente (Cordilleras Béticas. Alicante)
(Sociedad Geológica de España, 1991)The materials from Miocene age which appeared in this area are attributed to the so-ca/led «post-manto» materials. Those materials form a calcareous series with more detritical parts generated in the zone comprehended ... -
Zonación magnética y caracterización del elipsoide de la susceptibilidad magnética en el plutón de Posets (Pirineos centrales)
(Sociedad Geológica de España, 1991)This work deals with the magnetic susceptibility and anisotropy of the Variscan Posets pluton in the Central Pyrenees. Magnetic susceptibility values provide a concentric zoning. The measurements of the magnetic anisotropy ... -
Primeros datos sobre la fauna de roedores del yacimiento Pleistoceno de Plines-l (Cuenca de Granada, Cordilleras Béticas)
(Sociedad Geológica de España, 1991)Contributions from the Plines-1 site aid in increasing what little information is available on lower Pleistocene small vertebrate fauna from the Granada Basin. A new species, Castillomys plinensis nov. sp. is defined -
Litoestratigrafía del Jurásico de Gipuzkoa y NW de Navarra
(Sociedad Geológica de España, 1991)Lithostratigraphic correlation of numerous sequences leads to the reconstruction of the mesoscale depositional geometries of the Jurassic succession of the eastern part of the Basque-Cantabrian Basin (Gipuzkoa and Navarra ... -
Pautas de distribución de Sr/Ca, Mg/Ca y Mn/Fe en carbonatos urgonianos del oeste de Vizcaya (España)
(Sociedad Geológica de España, 1991)The distribution patterns of Ca, Si, Sr, Mn, Mg and Fe in Urgonian carbonate rocks from NW Biscay (Spain) reveals the differences between shallow-water (270 ppm Sr, 62 ppm Mn) and deepwater (820 ppm Sr, 116 ppm Mn) limestones. ... -
Una rampa carbonatada con fases de emersión y excavación de paleocañones (Calcarenitas de Peñalba, Albiense inferior, Bizkaia)
(Sociedad Geológica de España, 1991)The architecture and vertical evolution of facies in the Peñalba Calcarenitic ramp (Bizkaia) suggest several phases of emersion. These were coeval with the formation of incised canyons which were later filled with mass-gravity ... -
Tratamiento de Ias cimentaciones. Consideraciones alrededor de un ensayo de inyecciones. Presa de Las Portas. España
(Sociedad Geológica de España, 1991)The difficulties to obtain the groutability of slate rocks in Large Dams foundations are shown through the grouting test realised in Las Portas Dam foundation. The use of high pressures, over the Critical Permeability ... -
Synchysita en las carbonatitas de la Pta. del Peñón Blanco, Fuerteventura, Islas Canarias
(Sociedad Geológica de España, 1991)Synchisite, a REE-fluorocarbonate, appears in a carbonatitic vein located in Pta del Peñon Blanco, Fuerteventura. This mineral is interpreted as the result of the action of carbonated water over REE-fluorapatite. -
La ventana tectónica de Morcín (Unidad estructural del Aramo, zona cantábrica, Asturias)
(Sociedad Geológica de España, 1991)The existence of a tectonic window in the northern area of the Aramo-Morcin anticlinorium is demonstrated. The thrust sheet is formed of an early Devonian detritical and calcareous succesion called the Raneces Group, whereas ... -
La evolución tectonometamórfica del Manto de Los Reales y el Maláguide, al oeste de Málaga
(Sociedad Geológica de España, 1991)In the Western part of the Betic Cordillera the Malaguide Complex overlies the Los Reales Nappe. From lithological, metamorphic and structural features the Malaguide Complex and the Los Reales nappe can be included in ... -
La cobertera paleozoica posthercínica en el Oriente de Asturias
(Sociedad Geológica de España, 1991)The discovery of plant fragments in the basal marine quartzites of the post-Hercynian cover at the locality of Mestas de Con (Asturias), which have been determined as Stephanian C or Autunian, allows dating the end of the ... -
Geometry and kinematic of post-Aquitanian brittle deformation in the Alpujárride rocks and their relation with the Alpujárride/ Nevado-FiIábride contact
(Sociedad Geológica de España, 1991)An extensional britt/e detachment with a top-to-the-west directed movement exists between the Alpujárride and Nevado-FiIábride Complexes (Betic Cordilleras): The Mecina Detachment Fault. Extensional duplexes and thinning ... -
Oxygen Isotopic data for the early and late diagenetic chert in carbonate turbidites (Upper Cretaceous), Northeast Bilbao, Spain
(Sociedad Geológica de España, 1991)Se han obtenido los valores de ô18 0 (SMOW) de dos tipos de sílex (temprano y tardío) presentes en las turbiditas carbonatadas de la Formación Plencia (Cuenca Vasco Cantábrica). El sílex temprano tiene unos valores medios ...
