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Browsing Geogaceta -- Nº 25, (1998) by Title
Now showing items 1-20 of 53
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Abanicos aluviales cuaternarios del Baix Camp (provincia de Tarragona): resultados de dataciones radiométricas
(Sociedad Geológica de España, 1998)The Quaternary fans which cover the southernmost part of the El Camp Basin belong to three generations. Noticeable calcrete levels developed on the top of fans from the first and second generation. Radiometric dating by ... -
Alteraciones caoliniticas sobre rocas Plutonicas en Sierra Morena Occidental (Sierra de Aracena, Huelva)
(Sociedad Geológica de España, 1998)This work makes a morphological description and a physical and quimical analysis of two paleosols over plutonic rocks in the Sierra de Aracena (Huelva province). Note their kaolinitic characteristic and the high levels of ... -
Alteraciones esmertítico-caolmíticas en Sierra Morena Occidental (Sierra de Aracena, Huelva)
(Sociedad Geológica de España, 1998)This work deals with the morphological and physical-quimical description of three paleosols develop over plutonic materials and located at depressional areas in the Sierra de Aracena (Huelva province). Note their clayey ... -
Análisis preliminar de los foraminíferos bentónicos Holocenos de Martinica (Pequeñas Antillas)
(Sociedad Geológica de España, 1998)A total of 94 species of benthonic Foraminifera have been identified in the shelf and bathyal sediments of Martinique (Lesser Antilles). The authochtonous representatives only occur in the eastern area of the island, while ... -
Asociaciones arcillosas en llanuras lutiticas y medios lacustres efímeros (Eoceno, Cuenca de Almazán)
(Sociedad Geológica de España, 1998)The Cihuela Carbonate unit is located in the eastern part of the Tertiary continental Almazan Basin, which is connected to the Duero Basin. This unit is 200 hundred metres thick and it consists of five increasing-upward ... -
Balance hidrico del acuífero del río Vélez (Málaga) en los años hidrológicos 1993/94 y 1994/95
(Sociedad Geológica de España, 1998)Water balances in the Vélez river aquifer have been carried out for the hydrological years 1993/94 and 1994/95. Accurate evaluation of fresh-water inputs and outputs from the detrital aquifer indicates that it has been ... -
Cálculo de la anomalía gravimétrica de una cuenca sedimentaria. Su aplicación en la cuenca de Almazán
(Sociedad Geológica de España, 1998)Almazan Tertiary Basin has a well known geometry based on seismic surveys. From these data, the gravity anomaly due to tertiary sediments has been carried out using the Bhaskara Rao, Prakash, and Ramesh Babu (1990) method. ... -
Comparación entre el metamorfismo de la Cuenca de Cameros y el de la Cuenca Aurífera de Witwatersrand (Suráfrica). Implicaciones Metalogenéticas
(Sociedad Geológica de España, 1998)The Witwatersrand Coldfield (WCF) and the Cameros Basin (CB) were subjected to widespread fluid flow during metamorphism. Physical conditions reached at the thermal peaks have been estimated at 1 kb and 340°C in the case ... -
Composición isotópica de las aguas de la Unidad Hidrogeológica Yunquera-Nieves (Provincia de Málaga)
(Sociedad Geológica de España, 1998)The isotopic composition of the waters sampled in the Hydrogeological Unit Yunquera-Nieves are from Mediterranean and Atlantic origin. The lsO and 2H contents define a local meteoric water line with lower slope than mundial ... -
Consideraciones sobre la salinidad de las aguas subterráneas del delta del río Andarax (Almería)
(Sociedad Geológica de España, 1998)The salinity proceses affecting of groundwaters from the delta of the Andarax river are very complex. A group of processes occur in relation with the leaching of saline materials of marine origen and with the seawater ... -
Contribución de los datos isotópicos al conocimiento hidrogeológico del sector Caspe-Maella
(Sociedad Geológica de España, 1998)The isotopie ratios of 180/16 O and 2H/1H, confirms the discharge of a regional carbonate aquifer in the Caspe - Maella area. The recharge area of this aquifer takes place in the Iberian Chain and the discharge takes place ... -
Control tectónico y distribución de las facies en el tránsito Triásico-Jurásico en el sector de Oliete (Teruel)
(Sociedad Geológica de España, 1998)Facies and thickness distribution in the Cortes de Tajuña Fm. was controlled by extensional fault activity around the Triassic-Jurassic boundary in the Iberian basin. The analysis of the outcrops located South of Oliete ... -
Datación magnetoestratigráfica de las evaporitas de la cuenca neógena de Fortuna (Murcia)
(Sociedad Geológica de España, 1998)The magnetostratigraphic study of the Río Chicamo section (240 m) in the Neogene Fortuna Basin (Murcia, Eastern Betics) has enabled the record of five magnetozones. The possible correlations with the standard geomagnetic ... -
Deformación progresiva de la Zona Sudportuguesa: Plegamiento y cizallamiento de secuencias multicapa
Alonso Chaves, Francisco Manuel
; García Navarro, Encarnación; Camacho Cerro, Manuel Alejandro (Sociedad Geológica de España, 1998)
Folds, reverse faults and thrusts in the South Portuguese Zone (SW Iberia) have been classically related with the progressive deformation of the Variscan thrust -fold belt. All structures verge toward South and Southwest. ... -
Distribución de contituyentes minoritarios y traza en las aguas subterráneas de la cuenca de Baza (Granada)
(Sociedad Goelógica de España, 1998)Geochemical research has been carried out on 43 groundwater samples from the detrital aquifer of Baza-Caniles, in order to evaluate the pattern of some minor and trace elements (F, Sr, Al, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb ... -
Efectos de la meteorización laterítica pretriásica en dolomías del Silúrico-Devónico de la Cordillera Costero Catalana (NE España)
(Sociedad Geológica de España, 1998)As result of tectonic uplift during the last stages (Permian) of the Hercynian orogeny, the outcropping rocks of Catalan Coastal Ranges (metamorphic, igneous and sedimentary rocks) were submitted to extensive chemical ... -
El Arco del Andén Verde, un gran deslizamiento gravitacional en la costa noroeste de Gran Canaria (Islas Canarias)
(Sociedad Geológica de España, 1998)A sector of the northwestern coast of Gran Canaria (Canary Island) shows morphological and tectónica! characters, here described, wich demostrate the presence of a big gravitational landslide of the debris avalanche type, ... -
El Bathoniense-Kimmeridgiense (Jurásico medio-superior) en la región de Obón-Torre de las Arcas (Teruel)
(Sociedad Geológica de España, 1998)The middle-upper Jurassic of the Obón-Torre de las Arcas area (Teruel province, northern Iberian Chain) consists of five stratigraphic units. Unit I is formed by oolitic grainstones (c. 20 m thick) and was developed during ... -
El complejo ígneo de Valle de La Serena: características y significado geodinàmico
(Sociedad Geológica de España, 1998)The Valle de la Serena igneous outcrops are situated in the Obejo-Valsequillo-Puebla de la Reina domain of the northern Ossa-Morena zone (OMZ, Iberian Massif). This sector is considered to correspond to the contact area ... -
El Macizo de Mérida, un arco volcánico cadomiense reactivado en el hercínico
(Sociedad Geológica de España, 1998)The Merida igneous outcrops are situated in the Obejo-Valsequillo-Puebla de la Reina Domain (DOVPR) of the northern Ossa-Morena Zone (Iberian Massif). This massif is composed by plutonic and volcanic rocks. These rocks are ...
