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Browsing Geogaceta -- Nº 22, (1997) by Title
Now showing items 1-20 of 56
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Algunas precisiones sobre las fallas del margen SW de la Cuenca Vascocantábrica
(Sociedad Geológica de España, 1997)The important faults bounding the SW margin of the Basquecantabrian basin are given, in the geological literature, different and sometimes contradictory names. This paper revises the appropriatedness of these names on the ... -
Análisis preliminar de los ostrácodos del Mioceno Inferior de las Bardenas Reales de Navarra (Cuenca del Ebro)
(Sociedad Geológica de España, 1997)The outcrops of the Tudela Formation, Lower Miocene (Ramblian), in the Bardenas Reales of Navarra (western area of the Ebro Basin) are very rich on vertebrate remains (fishes, amphibians, reptiles, birds and mammals), ... -
Arquitectura estrati gráfica del sistema de plataforma dominada por tormentas de la Fm. Valmaseda (Albiense sup.-Cenomaniense inf. de la cuenca Vascocantábrica)
(Sociedad Geológica de España, 1997)The Valmaseda Fm. comprises a thick siliciclastic shallow marine depositions! system, developed in the southern margin of the Basque Cantabrian basin. Its western sector, located ¡between the Tornos Pass (Cantabria-Burgos) ... -
Arquitectura sedimentaria y estratigrafía secuencial del Cenomaniense superior-Cenomaniense terminal. Cordillera Ibérica Central
(Sociedad Geológica de España, 1997)The D.S. «Cabrejas del Pinar» is recorded during upper Cenomanian-uppermost Cenomanian. The low system tract is not recorded. No clear evidences for the high system tracts and similar facies on the field between two ... -
Asociaciones de foraminíferos bentónicos cuaternarios de la plataforma del río Maroni (Guayana francesa): contribución paleogeográfica
(Sociedad Geológica de España, 1997)The distribution of benthic foraminiferal microfauna recovered from two cores on the Maroni continental shelf (French Guiana) has been studied. 1 00 species and two types of foraminiferal assemblages have been identified ... -
Asociaciones de foraminíferos y ostrácodos en el Cenomaniense de Leioa (Cuenca Vasca)
(Sociedad Geológica de España, 1997)The Leioa section is representative of deep Cenomanian sedimentation from the western area of the Basque Basin. Detailed analysis of the microfaunas of foraminifers (planktonic and benthic) and ostracodes, taking into ... -
Barita de neoformación en la Arenisca de Villamayor (Salamanca). Estudio preliminar
(Sociedad Geológica de España, 1997)The barite studied in the Villamayor sandstone is located in old rhizoliths related to subvertical fractures which affect these subarcosic deposits. These zones are actually in great circulation within underground waters ... -
Características de la llanura intermareal asociada al canal de Mira (dominio interno del complejo isla-barrera de Aveiro, Portugal)
(Sociedad Geológica de España, 1997)The Mira channel, located in the inner domain of the Aveiro barrier-island complex, is subdivided in three sections: head, intermediate and mouth, according to their morphological and sedimentary features. Their study shows ... -
Caracterización del plutón granodiorífico de Los Pedroches en su sector noroccidental (Comarca de La Serena, Badajoz)
(Sociedad Geológica de España, 1997)This paper is a brief description of the Hercynian calc-alkaline granodioritic pluton of the Los Pedroches batholith at its NW branch (La Serena, Badajoz). This study is located in the National Topographic Map N.T.M. number ... -
Caracterización y ambiente de formación de los paleosuelos rojos en la cuenca terciaria del río Amarguillo (Toledo)
(Sociedad Geológica de España, 1997)Several red paleosoils related to Tertiary deposits and showing a good development of calcic and argillic horizons are studied. According to their morphology and clay minerals a genetical change towards the top of the ... -
Comentarios al artículo Magnetoestratígrafía preliminar de los materiales pliocenos de la cubeta de Villarroya (Sierra de Cameros, La Rioja), de E. Pueyo Morer, A. Muñoz Jiménez y J.M. Parés (1996)
(Sociedad Geológica de España, 1997)In the present note we comment on the recent magnetostratigraphy dating above the Gauss/Matuyama boundary of the vertebrate locality of Villarroya. This dating is based on its supposed biochronological age and precisely ... -
Comparación geoquímica y mineralógica del ripio de perforación del sondeo lzarra-1 (Estella, Navarra)
(Sociedad Geológica de España, 1997)Geochemical and mineralogical comparison of a sequence of "wet" and "dry" samples from the lzarra-1 drilling belonging to the Zufia formation (Estella, Navarra) has been made. The following techniques have been applied; ... -
Contransting shallowing versus deepening upward cycles and their position in a carbonate ramp (Lower Cretaceous, Gorbea, Bizkaia)
(Sociedad Geológica de España, 1997)Contrasting deepening versus shallowing upward cycles formed in different depositional settings of a carbonate ramp: shallowing upward cycles characterize the inner ramp, whereas deepening upward cycles characterize the ... -
Deformación de cizalla en el domo migmatítico de St. Malo (Macizo Armoricano, oeste de Francia)
(Sociedad Geológica de España, 1997)The Cadomian migmatite dome of St. Malo is affected by centimetric to metric shear bands. The shear bands bear a stretching lineation underlined by alignments of fibrous sillimanite crystals at Dinard and St. Briac outcrops. ... -
Depósitos arenosos de un delta tipo Gilbert en el Urgoniano de Laga (Bizkaia): Facies y procesos sedimentarios
(Sociedad Geológica de España, 1997)Sand and silt deposits of a fluvial-dominated Gilbert type delta corresponding to an Urgonian mixed platform are described and interpreted. Their outcrop in Laga beach (Bizkaia) allows the recognition of10 sedimentary fades ... -
Dinosaurios dromeosaúridos (Saurischia: Theropodo) en el Barremiense Superior (Cretácico Inferior) de Castellote,Teruel
(Sociedad Geológica de España, 1997)Discoveries of isolated teeth of dromeosaurid (theropod) dinosaurs from the Upper Barremian of Spain, provided the first evidence that the range of dromeosaurid extended to southern Europe in the Lower Cretaceous. We report ... -
Distribución estratigráfica de los episodios volcánicos submarinos del Albiense-Santoniense en la Cuenca Vasca (sector Gernika-Plentzia, Bizkaia)
(Sociedad Geológica de España, 1997)In the central domain of the Basque-Cantabrian Basin (Gernika-Plentzia sector) it has been characterized seven volcanic episodes, framed in the cretaceous alkali basaltic eruptive period. These comprise sheet lavas, pillow ... -
El anticlinal de Muel-Jaulín (Zaragoza) y su relación con la extensión cretácica
(Sociedad Geológica de España, 1997)The Muel-Jaulin region shows structures related to the Lower Cretaceous extension and the Tertiary compression respectively. Cretaceous normal faults constitute the northern border of the Aguilôn Cretaceous basin, appearing ... -
El estrangulamiento en enero de 1970 del meandro del castillo de Aldovea en el río Henares
(Sociedad Geológica de España, 1997)The meandering planform evolution between 1877 and 1 995 AD of the Castillo de Aldovea meander, at the lower reach of the Henares river, was studed. Topographic maps (form 1877 to 1995) and a series of aerial photographs ... -
El paleokarst de Nazaré (Cretácico Superior de la Cuenca Lusitana, Portugal)
(Sociedad Geológica de España, 1997)In the Nazare region, (west Portuguese coast) there is an exceptionally well exposed paleokarst associated with the Upper Cenomanian carbonate succession and the overlying siliciclastics series of probable Turonian-Campanian ...
