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Browsing Geogaceta -- Nº 38, (2005) by Issue Date
Now showing items 1-20 of 67
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Caracterización de materiales volcánicos mediante técnicas geofísicas someras: 2. Georadar
(Sociedad Geológica de España, 2005)We have analyzed the ground penetrating radar (GPR) response in several volcanic materials (massive, pahoehoe and aa lava flows and airfall deposits) occurring in the Las Cañadas edifice (Tenerife, Canary Islands), in ... -
Caracterización de los depósitos sedimentarios con dinosaurios de Riodeva (Teruel)
(Sociedad Geológica de España, 2005)Recent discoveries of dinosaur fossils in Riodeva led us to carry out a systematic study of the geology of the area. The calcareous-siliciclastic facies rich in fossil bones are attributed to the Villar del Arzobispo Formation ... -
Abanicos aluviales telescópicos cuaternarios. Andes argentinos
(Sociedad Geológica de España, 2005)The largest rivers that drain the Argentine Andean Ranges are characterised by incised valleys in high mountains and by a variety of Quaternary terraces. Their convex-up morphology suggests that these terraces are related ... -
Procedencia y edad de las diamictitas del Paleozoico inferior de la cuenca de Perú-Bolivia (Gondwana occidental)
(Sociedad Geológica de España, 2005)An extensive diamictite-bearing unit is present within the lower Palaeozoic siliciclastic sequence of the Central Andes. A review of its lithostratigraphy, sedimentology and biostratigraphy allows to differentiate two ... -
Control orbital de la dinámica de la surgencia de Perú durante los últimos 800 ka evidenciado por las asociaciones de Cocolitofóridos
(Sociedad Geológica de España, 2005)In order to analyze the surface water dynamics in the Peru upwelling system zone during the last 800 Ka, we studied the calcareous nannofossil content. The ODP site 1237 coccolith assemblage revealed two dominant taxa: ... -
Dinámica de formas de fondo en la desembocadura del estuario del Río Piedras (Huelva)
Delgado Rodríguez, Irene; Morales González, Juan Antonio
; Gutiérrez Mas, José Manuel (Sociedad Geológica de España, 2005)
The estuary of the Piedras River is a small and narrow estuary, with a reduced fluvial input and a wide spit in its mouth in whose apex expands a wide system of ebb-tidal deltas. The present work characterizes the dimensions, ... -
El Control del Paleorrelieve durante la Transgresión Tortoniense: Un Caso de Estudio en el Margen Pasivo de la Cuenca del Guadalquivir (Sur de España)
Abad de los Santos, Manuel; Ruiz Muñoz, Francisco; Pendón Martín, José Gabriel; Rodríguez Vidal, Joaquín; Cáceres Puro, Luis Miguel; Cantano Martín, Mercedes (Sociedad Geológica de España, 2005)
The Guadalquivir foreland basin has a complex temporal and spatial evolution which is shown in its facies architecture and its paleogeographical distribution during Tortonian. In this work we emphasize the control that ... -
Características diferenciales y génesis de los niveles silíceos explotados en el yacimiento arqueológico de Casa Montero (Vicálvaro, Madrid)
(Sociedad Geológica de España, 2005)The research during the construction of the M-50 highway has allowed the study of the silica levels that constitute the most important Neolithic flint mine in the Iberian Peninsula. A group of more than 3.800 extraction ... -
«Pleurocoelus» valdensis Lydekker, 1889 (Saurischia, Sauropoda) en el Cretácico Inferior (Barremiense) de la Península Ibérica
(Sociedad Geológica de España, 2005)One fragmentary sauropod isolated tooth from the Upper Barremian-Lower Aptian (Artoles Formation) of Vallipón (Castellote, Teruel province, Spain) is described. It has a «parallel-sided» crown and a «compressed ... -
Distribución espacial del cocolitofórido Emiliania huxleyi en el sector Pacífico del océano Antártico: nuevos datos para la reconstrucción paleoambiental y caracterización de eventos bioestratigráficos
(Sociedad Geológica de España, 2005)A specific biometric study of coccoliths of Emiliania huxleyi has been accomplished on 25 surface water samples from the eastern Pacific sector of the Southern Ocean. In all samples, E. huxleyi is the most abundant taxon, ... -
Microestructuras, diagénesis y evidencias estacionales en las valvas de Crassostrea sp. del Albiense superior-Cenomaniense inferior en la playa de Somocuevas (Liencres, Cantabria)
(Sociedad Geológica de España, 2005)The microstructural and cathodoluminescence (CL) study of Crassotrea sp. shells of Somocuevas, Cantabria (Upper Albian-Lower Cenomanian) has allowed to determinate that the dominant diagenetic process involved in the ... -
Inversión metamórfica en el orógeno famatiniano de la Sierra de San Luis, Argentina
(Sociedad Geológica de España, 2005)P-T conditions of Famatinian metamorphism (c. 465 Ma) were determined along a cross section in the central southern part of the Sierras de San Luis, Eastern Sierras Pampeanas. A continuity from low to high grade metamorphism ... -
La problemática relación entre estadística y ostrácodos marinos
Ruiz Muñoz, Francisco; Abad de los Santos, Manuel; Muñoz, J. M. (Sociedad Geológica de España, 2005)
This paper analyses the possibilities of the statistical techniques in the treatment of marine ostracod populations, with the indication of the commonest problems observed in the different stages (sampling, laboratory ... -
Dermal spines of stegosaurian dinosaurs from the Lower Cretaceous (Hauterivian-Barremian) of Galve (Teruel, Aragón, Spain)
(Sociedad Geológica de España, 2005)Se describen restos de dinosaurios estegosaurios en el Cretácico Inferior (facies «Weald») de la región de Galve (Teruel). El material consiste en dos espinas dérmicas aisladas: una espina pequeña y delgada procedente ... -
Variaciones microfaunísticas en el Cenomaniense superior a Turoniense superior de la Plataforma Norcastellana (área Puentedey-Santelices, Norte Burgos): respuesta morfológica de los inocerámidos
(Sociedad Geológica de España, 2005)Analyses carried out on benthonic foraminiferal assemblages of the Puentedey-Hornillalatorre formations (Norcastilian Platform) are part of a multidisciplinary research with the main subject of understanding the palaeo ... -
Caracterización paleosísmica preliminar de la falla de Concud (fosa del Jiloca, Teruel)
(Sociedad Geológica de España, 2005)The Concud fault is a 13-km long fault located at the eastern boundary of the Jiloca graben (Teruel, Spain) that has been active during most of Late Pliocene and Quaternary times. Offsets measured in some dated stratigraphic ... -
Estudio de la composición isotópica (Pb-S-O) de las mineralizaciones Pb-Zn de Mazarambroz (Banda Milonítica de Toledo)
(Sociedad Geológica de España, 2005)Combined lead, sulphur and oxygen isotopes have been analysed in ore (galena and sphalerite) and associated (quartz, barite) minerals from the Mazarambroz Pb-Zn mineralization. Lead isotopic model ages in galenas cluster ... -
Formación de dolomita y huntita en depósitos de moon-milk en la Cueva de Castañar de Ibor (Cáceres)
(Sociedad Geológica de España, 2005)The Castañar the Ibor Cave formed by dissolution of the Precambrian dolostone beds of the Ibor Group. The cave contains a variety of calcitic and aragonitic speleothems, and also moon-milk deposits composed of huntite, ... -
Datación U-Pb SHRIMP de circones detríticos en paranfibolitas neoproterozoicas de las secuencia Difunta Correa (Sierras Pampeanas Occidentales, Argentina)
(Sociedad Geológica de España, 2005)The Neoproterozoic Difunta Correa meta-sedimentary sequence (DCSS) of Western Sierras Pampeanas is a cover to a rejuvenated Grenvillian basement. The Western Sierras Pampeanas are allegedly part of the exotic Precordillera ... -
Caracterización petrofísica de areniscas del Eoceno Medio–Superior del Pirineo Occidental
(Sociedad Geológica de España, 2005)In this work we have studied six varieties of Tertiary sandstone from the Pyrenees, they are all litharenites with medium grain size between 0,1 a 0,25 mm and porosity between 0,4 - 4%. Some petrographical and physical ...
