Thesis Collection
Last Deposit
Browsing Geogaceta -- Nº 06, (1989) by Issue Date
Now showing items 1-20 of 37
-
Sedimentación lacustre fanerozoica en España
(Sociedad Geológica de España, 1989) -
Dinámica del proceso de alteración ambiental de la «piedra de Villamayor»
(Sociedad Geológica de España, 1989)The Villamayor sandstones, Upper Paleocene in age, are composed of strongly arkosic fluvial sediments. The sediment is organized in sequences of decreasing grain size of which only one part can de exploited for construction ... -
Contaminación por compuestos nitrogenados en el acuífero aluvial de la confluencia de los ríos Jarama y Henares: Origen y evolución
(Sociedad Geológica de España, 1989)The presence of nitrogen compounds in an aquifer is an evidence of pollution. In the aquifer studied, these compounds reach, in 50% of the analyzed samples, levels of nitrite, nitrate and ammonium too high for the water ... -
Estudio estratigráfico y paleogeográfico de la Unidad Informal de San Miguel de Pedroso (Neógeno del Pasillo de Los Montes de Oca, Burgos)
(Sociedad Geológica de España, 1989)The stratigraphy and sedimentology of the San Miguel of Pedroso unit from the Oca's Mountain Corridor (Between Duero Basin and Ebro). Its Palaeogeography during Neogene as well as these materials show important lateral ... -
Controles en la sedimentación del Cretácico Inferior de Aguilón (Zaragoza, Cordillera Ibérica Septentrional)
(Sociedad Geológica de España, 1989)Lower Cretaceus sediments (Hauteriviam to Barremian) in Northern Iberian Chain (Aguilón, Zaragoza) are deposited in a shallow lacustrine environment. Three main shallowing upward sequences are developed. In the upper two ... -
El yacimiento de Pb-Zn de Rubiales (Lugo, España): hipótesis genética
(Sociedad Geológica de España, 1989)The genesis of the Rubiales orebody seems to be in direct relation with the development of the Hercynian Orogenesis. lt can be classified as a hydrothermal deposit of tectonic segregation in a shear zone -
Bioestratigrafía con foraminíferos planctónicos y nanoplancton calcáreo de la sección de Campo (paraestratotipo del Ilerdiense)
(Sociedad Geológica de España, 1989)A biostratigraphic study of Campo section (Ilerdian parastratotype) has been carried out by means of planktonic foraminifera and calcareous nannoplankton. The most standard and recent biozonations for Lower Eocene (Ilerdian ... -
Asociaciones de facies en los fan deltas de las cuencas neógenas y cuaternarias de las Cordilleras Béticas Orientales
(Sociedad Geológica de España, 1989)Fan deltas occur in a wide range of tectonic and sedimentary settings which are likely to generate a varied mosaic of facies associations. Fan delta deposits provide a good geodynamic record of basins as illustrated by ... -
Ciclos deltaicos en el Jurásico Superior del flanco oeste del diapiro de Caldas da Rainha, Portugal
(Sociedad Geológica de España, 1989)Three litoestratigraphic unites have been identified in the São Martinho do Porto sea cliffs, which correspond with three deltaic cycles. The paleocurrents analysis show that for the first two cycles, the sediments come ... -
La arenisca de Villamayor: Influencia de la humedad en su resistencia
(Sociedad Geológica de España, 1989)Villamayor sandstone is the main ancient and modern building material in Salamanca. The results of the tests relates the failure strength with the moisture content and the strain -
La transgresión Ilerdense (calizas de Alveolinas) en la Cuenca de Villarcayo (Burgos)
(Sociedad Geológica de España, 1989)The Villarcayo basin is situated at the NW of Duero Basin and it's incorporated into the Cantabric dominio. The ilerdien transgression is represented for Alveolina Limestone inconformity above transition marine-continental ... -
Los micromamíferos del Mioceno inferior de Pañalba (Huesca). Implicaciones bioestratigráficas
(Sociedad Geológica de España, 1989)The Lower Miocene deposits of the Peñalba area in the Ebro basin, have yielded mammalian remains at various levels. New mammalian remains are studied in this paper. The new paleontological data offers the possibility to ... -
Las rocas ígneas de Estalaya (Palencia) y los Skarns asociados
(Sociedad Geológica de España, 1989)In this paper we make a brief study of the intrusive rocks from the Estalaya stock (Palencia, Spain), with special regard to the alteration processes. We also present a short description of the calc-silicate rocks of the ... -
Moluscos, Ostrácodos y Palinología de las facies fluvio-lacustres del Neógeno del SE de la provincia de Valladolid (Cuenca del Duero)
(Sociedad Geológica de España, 1989)The Mollusca, Ostracoda, Foraminifera and Palino/gy from 14 localities in the Eastern Neogene of Valladolid (Duero Basin) are studied. Differents stratigraphic levels are included in the Facies «Dueñas», «Zaratán», «Cuestas» ... -
Neotectónica en la cuenca del alto Tormes (Sistema Central, Avila): Influencia en la morfología fluvial
(Sociedad Geológica de España, 1989)The High Tormes is caracterized for its aluvial and torrential regimen who ask to a general model of sinuous river complex: straight segments, straight with lateral bars, braided and meandering. The presence of gradient ... -
Mineralogía y texturas del meteorito de Nulles (colección del M.N.C.N., Madrid)
(Sociedad Geológica de España, 1989)The mineralogical and textural features of the Nulles meteorite are studied by optical microscopy, SEM, and electrone microprobe. Olivine and plagioclase are the main primary phases of the silicate minerals, with the ... -
Sedimentación continental miocena entre San Esteban de Gormaz y el Burgo de Osma (Soria)
(Sociedad Geológica de España, 1989)The main of this paper is to describe two units litostratigraphic deposits within miocene formations of the SE Duero Basin. The sediments developed in alluvial fan and palustrine areas display some variety resulting from ... -
Modalidades del emplazamiento de intrusiones calco-alcalinas, Stephaniense-Pérmicas, en el sector norte del Anticlinal de Montalbán (provincia de Teruel)
(Sociedad Geológica de España, 1989)In Montalban Anticline North Zone (Paleozoic basement of the Iberian Chain) a magmatism with calc-alkaline affinity, characterized by numerous Stephanian-Permian hypovolcanic intrusions, wich intruded in both carboniferous ... -
La estructura del plutón granítico de Boal (Asturias, España): Nuevas aportaciones sobre su «fabric» interna y modo de emplazamiento
(Sociedad Geológica de España, 1989)In this paper we attempt to sketch the structural pattern of the Boal pluton (WestAsturian-Leonese Zone) and provide new data which account for a pasive mode of emplacement and a subsequent structural evolution probably ...
