Thesis Collection
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Browsing Geogaceta -- Nº 15, (1993) by Issue Date
Now showing items 1-20 of 44
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Análisis estratigráfico de los sedimentos paleógenos de la sección de Sant Miquel del Fai (complejo deltaico de Sant Feliu de Codines-Gallifa, NE de la cuenca del Ebro)
(Sociedad Geológica de España, 1993)The Bartonian to Lower Priabonian sediments of the St. Feliu de Codines-Gallifa deltaic complex belong to the Ebro basin filling, and are in contact with the Prelitoral Catalan Range. In these materials we have defiped ... -
Aportaciones para la interpretación de Zoophycos
(Sociedad Geológica de España, 1993)Recent discoveries of well-preserved Zoophycos specimens in Eocene turbidite sediments W of Jaca (Southern Pyrenees), have permitted the confirmation of polemical data infered by Kotake (1989) concerning to the behaviour ... -
Caracterización petrológica y geoquímica de la Unidad Salina messimense de la cuenca de Lorca (sondeos S4 y S5)
(Sociedad Geológica de España, 1994)The mineralogical, petrological and geochemical characteristics of this saline unit indicate that the halite sedimentation took place in a subsiding shallow marine basin where contributions of continental and minor ... -
Análisis electrosecuencial: un ejemplo en el sondeo Vildé (Soria)
(Sociedad Geológica de España, 1994)Electrosequential analysis of logs from Vildé well (Soria) allows the identification of the lithostratigraphic units defined by Vilas et al., 1982, for the Upper Cretaceous of the Iberian Ranges. The data were used in a ... -
Variaciones laterales del "Nivel de Fuentes", Precámbrico-Cámbrico de la Zona Centro-Ibérica
(Sociedad Geológica de España, 1994)The "Nivel de Fuentes", in the Valdelacasa Allogroup (Precambrian-Cambrian), can be divided in five subunits. Each one of them is build-up by a basal megabreccia overlaid by a fine-grained turbidite wedge that tends to ... -
El paradigma bioestratigráfico y la sucesión cronoestratigráfica: sus relaciones con la estratigrafía
(Sociedad Geológica de España, 1994)The durability of the biostratigraphic paradigm (the Smith's principle of faunal succession) allows us to make some considerations on the true meaning of stratigraphy and on the requirements of the definition and use of ... -
Diferentes estilos de organización secuencia! en depósitos de abanico aluvial y abanico costero lateralmente relacionados (Sant Llorenc del Munt, Eoceno, cuenca de antepaís surpirenaica)
(Sociedad Geológica de España, 1994)High-resolution mapping and correlation of the syntectonic Sant Lloreng del Munt alluvial fan and fandelta deposits show that proximal alluvial fan sequences, d efined on the basis of sediment supply changes linked to ... -
Petrología y geoquímica del plutón aplopegmatítico de Peña Madrid (Sierra de Guadarrama, S.C.E.)
(Sociedad Geológica de España, 1994)The Peña Madrid aplo-pegmatitic pluton is a very fractionated l-type granite with typically MgO, Ti02, Ba, Sr, Nb and XREE low contents. They intrude as a sheet-like body in the Las Navas del Marqués batholith developing ... -
Remagnetizaciones asociadas a diagénesis y su relación con el emplazamiento de láminas cabalgantes en el Pirineo Meridional
(Sociedad Geológica de España, 1994)Paleomagnetic analysis in conjunction with petrographic Observations on Mesozoic carbonates from the southern Pyrenees reveals that the magnetization of thoserocks is a secondary CRM residing in both goethite and hematites ... -
Las facies de las plataformas de carbonatos del Aptiense-Albiense al NE de la provincia de Alicante. Zona Prebética, SE de España
(Sociedad Geológica de España, 1994)The study of several sections on platform limestones of Aptian-Albian age in SE Spain (Alicante province) has pointed out a rich variety of facies. The analysis of facies and their relationships has led us to reconstruct ... -
Las Megabrechas del Membrillar y su relación con el sustrato. Precámbrico-Cámbrico de la Zona Centro-Ibérica
(Sociedad Geológica de España, 1994)A detailed map was earned out in the Membrillar locality, Valdelacasa anticline (Central-lberian Zone), and a stratigraphical and sedimentological study of the Membrillar Megabreccias ("Nivel de Fuentes"). Two megabreccias ... -
Características isotópicas de carbonatos lacustres de tres cuencas terciarias del NE de la Península Ibérica
(Sociedad Geológica de España, 1994)The isotopic features of lacustrine carbonates from three Tertiary basins of Spain are compared. In the Campins and Bicorp basins the 8’3C and 8wO values of the lacustrine carbonates display different clusters that are ... -
Evolución estructural del margen SO de la cuenca Vasco Cantábrica
(Sociedad Geológica de España, 1994)The SW margin of the Basco Cantabrian basin (as the whole basin itself) is a clear example of inversion tectonics. During Mesozoic times a main extensional event is recognized. Rifting began in Upper Jurassic triggering ... -
Significado de los enclaves ricos en biotita en el plutón de Mora-Gálvez (Toledo)
(Sociedad Geológica de España, 1994)Biotite-rich enclaves are conspicuos in the peraluminous granites. They had been interpreted as either melting restites or trapped xenoliths at different crustal levels. This work studies the biotite chemical composition ... -
Cuaternario aluvial de la depresión del Guadalquivir: episodios geomorfológicos y cronología paleomagnética
(Sociedad Geológica de España, 1994)The Guadalquivir's fluvial terraces are grouped in four morphogenetic complexs. Their magnetic records include the Matuyama and Bruhnes episodes. The special signification is the M/B change and a reverse event in Brunhes (Biwa?) -
Movimientos verticales recientes en Cataluña a partir de nivelaciones de precisión
(Sociedad Geológica de España, 1994)To determine recent vertical movements (R.V.M.) from precise leveling data we have compared the original height differences recorded in the field by the Instituto Geografico Nacional in two different campaigns. The accuracy, ... -
Cicliciclad en carbonatas lacustres paleógenos: Formación Morera del Montsant, Tarragona
(Sociedad Geológica de España, 1994)The Formation La Morera del Montsant Limestones (medium-upper Lutetian) is constituted by different sort of mudstones deposited in lacustrine and palustrine environment.The different facies associations allow us to obtain ... -
Observaciones sobre la posición estratigráfica de las formaciones de rudistas de Sant Corneli (cuenca cretácica surpirenaica central)
(Sociedad Geológica de España, 1994)Rudist formations crop out around the Sant Corneli anticline (South-Central Pyrenees), both on its southern flank (les Collades de Basturs) and on its northern flank (Vilanoveta). Earlier biostratigraphical studies assigned ... -
Zonas de cizalla dúctil en el Complejo Basal de Fuerteventura
(Sociedad Geológica de España, 1994)The oldest plutonic rocks of the Basal Complex of the Fuerteventura Island In the area of Amanay are an alkaline ultramafic-carbonatite complex. In certain areas these rocks are affected by two ductile shear systems with ... -
Sobre la posición estratigráfica de las "Margas de Gor", Sierra de Baza, Cordillera Bética
(Sociedad Geológica de España, 1994)The marly sediments traditionally known as "Cor Miocene" are located at the bottom of a very thick Middle Miocene detritic ensemble composed by clasts of alpujarride, malaguide and subbetic provenance. Locally they are ...
