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Browsing Geogaceta -- Nº 27, (1999) by Issue Date
Now showing items 1-20 of 59
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The intrusion of the Plasencia (Messejana) dike as part of the Circum-Atlantic Early Jurassic magmatism: Tectonic implications in the southwestern Iberian peninsula
(Sociedad Geológica de España, 1999)The Plasencia dike belongs to a vast Early Jurassic magmatic province that extends around the Central Atlantic. The origin of this magmatic event is related to a thermal anomaly at the base of the lithosphere, and its age ... -
Los depósitos terrigenos de la base de la secuencia de depósito Aptiense superior. Subcuenca de las Las Parras (provincia de Teruel)
(Sociedad Geológica de España, 1999)The bottom ofVillarroya de los Pinares formation, that is, the bottom of Upper Aptian D.S., is made up of terrigenous sediments. These materials show a retrogradational vertical evolution. This evolution started with fluvial ... -
Aplicación del método DRASTIC para la cartografía de vulnerabilidad a la contaminación del acuffero carbonatado de Torremolinos (Sierra de Mijas, provincia de Málaga)
(Sociedad Geológica de España, 1999)The paper show the results of the aplication of the DRASTIC method for contamination vulnerability assesment in the fissured carbonate aquifer of Torremolinos. The final mapping of the overlay cover using CIS (Arc/info y ... -
Wave-induced cross-shore sediment transport in the Ebro delta inner shelf
(Sociedad Geológica de España, 1999)The near-bottom wave-induced cross-shelf sediment transport is one of the main mechanisms to maintain morphologically inner shelves. In opposition to suspended sediment transport by currents that controls fine sediment ... -
Arquitectura de facies holocena del dominio fluvial del Estuario del Río Odiel (S.O. España)
Borrego Flores, José
; Morales González, Juan Antonio; Gil, N. (Sociedad Geológica de España, 1999)
Five different lithofades constituted the holocene infilling of the Odiel estuary fluvial domain. These facies have been recognized by a sedimentological study of six drilling cores located along a transverse profile. The ... -
Controles ambientales en la formación de sulfuros de Fe en sedimentos superficiales del Estuario del Río Odiel (S. O. España)
Borrego Flores, José; Monterde, J.; Morales González, Juan Antonio; López López, Manuel (Sociedad Geológica de España, 1999)
This paper studies the relationships between Organic Carbon, Sulphur, Pirite, total Fe and oxalate-extractable Fe, present in the superficial sediment on a subtidal-intertidal topographic profile at the Odiel River estuary. ... -
Sedimentologia y paleogeografía de la secuencia de deposito Aptiense inferior (Facies Urgón) en la subcuenca de Las Parras. (Teruel)
(Sociedad Geológica de España, 1999)The Lower Aptian D.S. is made up of materials which settled in shallow carbonate ramp enviroments. This sequence shows a retrogradational evolution, that is, from internal to mid ramp enviroments. The vertical evolution ... -
Caracterización hidrogeológica de la Sierra de la Horna (Alicante)
(Sociedad Geológica de España, 1999)In this paper we present the preliminary results ofthe'study of Sierra de Horna aquifer. There is a conection between Horna aquifer and the detritical aquifer of Rambla del Tarafa deduced from the piezometric data: The ... -
Sobre la contaminación de las aguas del estuario de los ríos Tinto y Odiel (Huelva)
Cerón García, Juan Carlos; Borrego Flores, José; Morales González, Juan Antonio (Sociedad Geológica de España, 1999)
The waters of the Huelva Estuary are polluted because of indiscriminate dumping of urban effluents. The nutrient contents of samples taken at the surface and from the bottom of the estuary were analysed to characterise the ... -
Paleobiocenosis de Heterostegina en sedimentos de origen litoral de la Fm. Calcarenita de Niebla (Mioceno superior, Cuenca del Guadalquivir, SO España)
Tosquella Angrill, Josep; Baceta, Juan Ignacio; González-Regalado Montero, María Luz; Ruiz Muñoz, Francisco (Sociedad Geológica de España, 1999)
A taphonomic analysis of some lumaquellic levels of Heterostegina interbedded in the basal sandy unit of the Calcarenita de Niebla Fm. (Huelva, Spain) is presented. However, it is made a revision of the main factors that ... -
Clasificación del régimen de flujo en los fondos de la bahía de Cádiz a partir del análisis de campos de formas de fondo
(Sociedad Geológica de España, 1999)Different bedforms fields in external areas of Cadiz bay have been identified in order to establish the flow regime, based on the analysis of side scan sonar recordings. The distribution of facies and bedforms are conditioned ... -
Análisis comparativo de procedencia de sedimentos lutíticos y arenosos interestratificados: El Permotrías del Desert de les Palmes (Castellón)
(Sociedad Geológica de España, 1999)The present study stablishes the compositional relation between sandstone and lutitic levels of the Permian and Triassic succession from Desert de les Palmes area (Castellón). The evolution shows a general quartz and ... -
Caracterización mineralógica e identificación de las áreas fuentes de los sedimentos actuales del istmo de jandía (Fuerteventura)
(Sociedad Geológica de España, 1999)The grain size, calcimetry and thin section studies, have been used to characterised the actual eolian sediment ofjandia isthmus. Nevertheless the application of the Rietveld method for the precise quantification of the ... -
Revisión taxonómica de "Echinosphaerites" murchisoni Verneuil y Barrande, 1855 (Echinodermata, Diploporita) del Ordovícico Medio centroibérico (España)
(Sociedad Geológica de España, 1999)The holotype of''Echinosphaerites'' murchisoni Verneuil and Barrande 1855 is reviewed, and proposed as the type species of Oretanocalix gen. nov. The new genus is characterised by an elongate theca of medium size, that ... -
Determinación de la ciclicidad temporal en los sedimentos varvados de la Laguna Mar Chiquita (Córdoba, República Argentina)
Morales González, Juan Antonio; Piovano, E. L.; Damatto Moreira, S. R.; Mazzilli, B. P.; Depetris, P. J.; Borrego Flores, José; Monterde, J. (Sociedad Geológica de España, 1999)
Laguna Mar Chiquita is the biggest lake in Argentina, probably originated 30.000 years ago. Three are the rivers discharging to this lake, which can pass from brackish-saline to hypersaline conditions related to changes ... -
Los ostrácodos infralitorales y circalitorales actuales del norte del Golfo de Cádiz
Ruiz Muñoz, Francisco; González-Regalado Montero, María Luz; Baceta, Juan Ignacio; Pendón Martín, José Gabriel; Hernández Molina, F. Javier; Somoza, L.; Díaz del Río, Víctor (Sociedad Geológica de España, 1999)
The study of the ostracod distribution in the inner part of the Spanish continental she/fallows to recognize the presence of a zonation which reflects changes in both depth and substrate. Four assemblages may be distinguished: ... -
Evaluación del flujo geotérmico en manantiales de Aragón
(Sociedad Geológica de España, 1999)The geothermal flow wich emerges by convection at the springs in Aragon is evaluated, and compared with the theoretical heat flow wich penetrates the surface of the region by conduction. The geological materials through ... -
Análisis mesoestructural automático del diaclasado: programa "Joints". Aplicación a un sector del antepaís Bético
(Sociedad Geológica de España, 1999)Computational methods related with the analysis of fault populations (striated planes) are used currently for the characterisation ofthe deformation in intraplate zones. Although these methods are quite successful, we ... -
Influencia del subvolcanismo en la sedimentación pelágica del Jurásico medio (Sierra de San Pedro, provincia de jaén, Subbético medio)
(Sociedad Geológica de España, 1999)In areas of the Median Subbetic, as in the middle Jurassic of the Sierra of San Pedro in the southwest of the province of Jaen, important outcrops of basic volcanic and subvolcanic rocks appear. In this area the sedimentation, ... -
Variaciones de turbidez de las aguas de la bahía de Cádiz determinadas a partir del análisis de imágenes Landsat TM
(Sociedad Geológica de España, 1999)Landsat TM images has been analysed to obtain extent and direction data about turbidity flumes in several hydrodinamic sinoptic situations in Cadiz bay waters. Results are beside data from water samples. Five turbidity ...
