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Browsing Geogaceta -- Nº 15, (1993) by Title
Now showing items 1-20 of 44
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A tectonic model for the volcanic province of Olot (NE Spain)
(Sociedad Geológica de España, 1994)Las fallas de dirección NW-SE, pertenecientes a una zona de tipo «transfer» del rifting neógeno del NE de España, han proporcionado los conductos de salida del magmatismo profundo de la región de Olot. Este magmatismo se ... -
El acantilado de El Asperillo: Cuaternario reciente y fases históricas en el litoral de Huelva
Borja Barrera, Francisco
; Díaz del Olmo, Fernando (Sociedad Geológica de España, 1994)
Two kinds of formations are present in the stratigraphic chronosecuence of the El Asperillo cliffs (Huelva coastline, Spain): Late Pleistocene-Holocene (22.000-11.000 BP) organic-rich horizons, and Holocene-Recent (<5.000 ... -
Análisis de la fracturación en la cuenca cenozoica de As Pontes (La Coruña)
(Sociedad Geológica de España, 1994)Minor fault analysis using Angelier and Mechler (1977) and Etchecopar et al. (1981) methods have been carried out in the Cenozoic As Pontes Basin (NW Spain).The paleostress tensors obtained are in agreement with the ... -
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 ... -
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 ... -
Arquitectura deposicional y sedimentologia del Complejo de Ulldemolins (Paleogeno), Tarragona
(Sociedad Geológica de España, 1994)The non-marine Upper Thanetian-Lutetian sediments from Ulldemolins Complex show high variety of facies and lithosomes with complex geometrical relationships between them. Correspond to distal alluvial deposits, made up of ... -
Las calizas con esponjas del Bajociense de la Cordillera Vasco-Cantábrica oriental (Navarra)
(Sociedad Geológica de España, 1994)During late Bajocian times, wide areas of the eastern Basc-Cantabrian Range were covered by sponge facies. Small-size sponge buildups and poorly sorted sponge and ammonite wackestone facies were developed in open platform ... -
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 ... -
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 ... -
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 ... -
Composición de las inclusiones fluidas en la halita del sondeo Biurrún (cuenca Potásica de Navarra)
(Sociedad Geológica de España, 1994)The solute concentration of fluid inclusions in halite samples have been analyzed by X-Ray microanalysis (Cryo-SEM-EDS). The results together with the mineral sequence are useful to describe the evolution of the Priabonian ... -
Cronoestratigrafía de los depósitos fluviokársticos del Cerro de la Oliva (Patones, Madrid)
(Sociedad Geológica de España, 1994)This paper deals with the chronostratigraphical interpretation of fluviokarstic terraces of the Cerro de la Oliva (Patones,Madrid). A magnetical reversion near Causs-Matuyama boundary in the uppermost deposits level and a ... -
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?) -
La deformación intraplaca del centro de España y la interpretación de los perfiles profundos de sísmica de reflexión en las Cordilleras Béticas
(Sociedad Geológica de España, 1994)The interpretation of the ESCI-Béticas deep seismic reflection profiles allows to define the type of deformation in the suture zone of the Iberian-Alborân crustal domains in the central Betics. This suture zone corresponds ... -
Depósitos cuaternarios en el Bajo Ebro: características estratigráficas y deposicíonales
(Sociedad Geológica de España, 1994)In the Bajo Ebro quaternary deposits different lithostratigraphic units are distinguished. Fluvial facies with tabular character: Ford Gravels, Colada Sandstones and Aldover Poligenic Gravels all with siliceous elastics. ... -
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 ... -
Un episódio volcánico pre-Cañadas en la Isla de Tenerife
(Sociedad Geológica de España, 1994)Based on new radiometric data, a Pre-Cañadas volcanic building of 3.5-3.0 Ma has been defined. This new building is mainly compared of basaltic rock cropping out in several gorges to the S of Cañadas Building, inside of ... -
Estudio paleomagnético del volcanismo de Campos de Calatrava
(Sociedad Geológica de España, 1994)A first systematic paleomagnetic study has been carried out in the upper Miocene-Pliocene volcanism ofthe Campos de Calatrava region. 18 localities have been sampled and 14 of them yielded useful paleomagnetic results. A ... -
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 ...
