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Browsing Geogaceta -- Nº 12, (1992) by Issue Date
Now showing items 1-20 of 43
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Transporte de sedimentos en suspension en la parte baja del río Ebro (Mediterráneo Occidental). Impacto ambiental de las presas
(Sociedad Geológica de España, 1992)Seven surveys were carried out to study the suspended sediment transport in the lower course of the Ebro River. Damming of the river and its tributaries has caused a high retention of the sediment load and has regulated ... -
Características estructurales y geométricas de la falla de desgarre de Lorca-Alhama
(Sociedad Geológica de España, 1992)The Lorca-Alhama fault is one of the more tectonic and seismically active sinistraI strike-slip fault of the eastern Betics. Its complex structural pattern records simultaneous development of ex- tensional and contractional ... -
Nuevo yacimiento de vertebrados del Mioceno Superior al Sur de Madrid (Cerro Batallones, Torrejón de Velasco)
(Sociedad Geológica de España, 1992)We are presenting the finding of a new site of vertebrate fossils in C° Batallones (Torrejdn de Velasco), which is situated in the southern area of the Madrid basin. The site lies in facies which correspond to the top of ... -
Características mineralógicas de una sóvita pirofanítica de la Pta. del Peñón Blanco, Fuerteventura, Canarias
(Sociedad Geológica de España, 1992)A carbonite vein composed by caldte and pyrophanite is described. Pyrophanite, a very unusual mineral phase in this kind of rocks is formed at low temperatures. This vein is classified as a late carbonatite -
Synonimy of Castillomys rivas Martin Suarez and Mein, 1991, Castiliomys Plinensis Ruiz Bustos, 1991 and C. Crusafonti Meini Ruiz Bustos, 1991
(Sociedad Geológica de España, 1992)Castillomys rivas Martin Suárez and Mein, 1991, Castillomys plinensis Ruiz Bustos, 1991 and C . crusafonti meini Ruiz Bustos, 1991 are considered to be synonyms. Accord ing to the International Code of Zoological Nomenclature ... -
Estudio cuantitativo de los foraminíferos planctónicos en el estratotipo de! límite Eoceno/Oligoceno en Massignano (Apeninos, Italia)
(Sociedad Geológica de España, 1992)The quantitative study of the planktic Foraminifera from the Eocene/Oligocene boundary stratotype at Massignano (Apennines, Italy) has been accomplished for the first time, This study allow us to establish the fauna/ changes ... -
Reconocimiento hidroquímico de zonas endorreicas del Karst evaporítico de Antequera (Málaga)
(Sociedad Geológica de España, 1992)Some small temporary and permanent lakes near Antequera (Malaga) have been monitored in order to identify their main hydrochemical features. They display a wide variety both in chemical facies and salinity. The origin of ... -
Las Icnitas de mamíferos del sur de Alicante (España)
(Sociedad Geológica de España, 1992)South of Alicante, in the eastern end o f Sierra del Colmenar, an outcrop of bird and mammal fossil footprints (icnites) is well exposed, the latter show in gan excellent state of preservation. In this paper the mammal ... -
Materia orgánica en la Fm. Arenas de Utrillas de Picofrentes (provincia de Soria): diagénesis mineral y orgánica
(Sociedad Geológica de España, 1992)By Rock-Eval pyrolysis method, fluorescence, microscopy and S.E.M. with E.D.A.X. analysis, the organic matter rich horizonts at the top of Utrillas Fm. in Picofrentes log were studied. Ail samples are potencially good ... -
Nota preliminar sobre la presencia de sudoita en las metapelitas de la unidad de Trevenque, Alpujárrides centrales
(Sociedad Geológica de España, 1992)Sudoite (MgAl)(Ai2)(SijA 1)0l0(OH)a has been found in the metapelltic formation of the Trevenque Unit. This mineral appears as a secondary phase produced by transformation of HP-LT characteristic minerals. Sudoite grows ... -
Variación del patrón de diaclasas a lo largo de la serie neógena de la Sierra de Sigena (Huesca): Posible relación con el campo de esfuerzos y su perturbación
(Sociedad Geológica de España, 1992)Neotectonic joints in the Ebro basin strike uniformly NNW-SSE, perpendicular or nearperpendicular to the direction of <33 in the moment it developed. Within the Sierra de Sigena there are joints with anomalous strikes. ... -
Introducción al estudio de diversos indicios cupríferos situados en el Valle de Cofrentes/Vall de Cofrents, Valencia
(Sociedad Geológica de España, 1992)In this communication, it will be effected an introduction to the study of some cupriferous indications placed between the detriclics levels of the Keuper, constituted by sandstones. In all of the cases, it's about ... -
Características y procesos postemplazamiento de la ignimbrita de la playa de San Juan (Tenerife)
(Sociedad Geológica de España, 1992)The Playa de San Juan Ignimbrite is a peralkaline pyroclastic flow that shows important facies variations depending on its emplacement position. The ignimbrite is strongly welded, where slopes exceed about 2CP dipping ... -
Contribución del análisis icnológico en la interpretación del origen de la rítmita margoso-calcárea de edad Kimmeridgiense inferior (Zona Platynota) en el Prebético Central
(Sociedad Geológica de España, 1992)In the Central Prebetic the sediments of Early Kimmeridgian age (Platynota Chron) are represented by rhyth¬mic successions which are make up by marls, marly limestones and limestones. In the context of an integrated research ... -
Zonación ambiental de «mounds» algales del Carbonífero de la Zona Cantábrica (NO de España)
(Sociedad Geológica de España, 1992)Limestones are conspicuous within the shallow water rocks of the Carboniferous (Namurian-Westphalian) foreland basin sequences of the Cantabrian Zone. These limestone bands, containing oustanding algal bioherms, show a ... -
Bioturbación de invertebrados y microcodium en faciès lacustres y fluviales: Thanetiense del Valle de Ager (Lérida)
(Sociedad Geológica de España, 1992)Lower Thanetian (Paleocene) fluvial and lacustrine deposits in Ager Basin contain frequent invertebrate burrows. These burrows are cylindrical, unlined and internally meniscate or maslve. Four forms are described in detail, ... -
El arrecife Bía (Mioceno superior de la Cuenca de Fortuna, Murcia). Bioconstrucción de Tarbellastraea Sp. y Porites Sp. compuesta de unidades menores
(Sociedad Geológica de España, 1992)The Cómala reef complex (Upper Miocene , Fortuna Basin, Murcia ) is m ade up of four bioconstructions each separated by sandstone/shale units. One of these bioconstructions, the Bfa reef, has been m apped in detail, allow ... -
Determinación de fábricas mediante la anisotropía de la susceptibilidad magnética (ASM) en rocas con diferente grado de deformación. Ejemplo de materiales eocenos de la cuenca de Ainsa (Pirineo Central)
(Sociedad Geológica de España, 1992)The anisotropy of magnetic susceptibility (AMS) has been used to establish the petrofabric of some Eocene grey marls from the southern Pyrenees. The rocks are affected by increasing deformation conditions fron wakly to ... -
Geología y fauna de los yacimientos kársticos de Atalaya y Artesa (Cuenca de Granada, Cordillera Bética)
(Sociedad Geológica de España, 1992)Geology and fauna of two paieokarsts sites are analyzed. The sites are placed in the Granada basin. They indicate two stage karstic active during the Quaternary -
Características hidroquímicas de las aguas termominerales de los Baños de Alhama de Murcia (Murcia)
(Sociedad Geológica de España, 1992)The Baños de Alhama de Murcia waters are calcium-sodium-magnesium sulfhate types and have a high temperature (44-45 °C) and conductivity (3.800-4.000mhosfcm); with cluster and factorial analysis of variables the study is ...
