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Browsing Geogaceta -- Nº 40, (2006) by Issue Date
Now showing items 1-20 of 79
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Distribución areal y ecología de las asociaciones de ostrácodos recientes en la marisma Joyel (Cantabria)
(2006)Recent ostracod assemblages of the Joyel marsh (Cantabria, N Spain) are described. Eigteen species are living in this marsh. The strongly eurihaline species Loxoconcha elliptica dominates the assemblages in the most of ... -
Magma flow directions in Azores basaltic dykes from AMS data: preliminary results from Corvo island
(2006)Se presenta el estudio preliminar de flujo ígneo en diques basálticos de la isla de Corvo, (Azores), usando la técnica de la Anisotropía de la Susceptibilidad Magnética (ASM). Las muestras proceden de un total de 5 diques ... -
Sucesión de secuencias volcánicas félsicas en el Complejo Vulcanosedimentario de la Faja Pirítica Ibérica: discriminación entre modelos volcánicos y subvolcánicos
Donaire Romero, Teodosio
; Pascual Martínez, Emilio; Valenzuela Aznar, Alfonso; González Roldán, Manuel Jesús; Toscano Macías, Manuel (Sociedad Geológica de España, 2006)
A field study is presented on two selected areas in the Volcano-Sedimentary Complex (VSC) of the Iberian Pyrite Belt (IPB), the Odiel River section and the Paymogo Volcanic lineament. Field evidence has allowed to ... -
Tafonomía cuantitativa del yacimiento de Cacela (Tortoniense superior; Algarve, Sur de Portugal)
(Sociedad Geológica de España, 2006)A quantitative taphonomic analysis were performed in the fossil assemblages of the late Tortonian of the lower-mid part of the Cacela Formation (Cacela, Algarve, S Portugal). Taphonomic results, together with sedimentological ... -
Variación estacional de las características texturales en los sedimentos intermareales del estuario de los ríos Tinto y Odiel (SO España)
López González, Nieves; Morales González, Juan Antonio; Borrego Flores, José; Carro Flores, Berta (Sociedad Geológica de España, 2006)
The seasonal evolution in the sediment textural characteristics along the Tinto and Odiel river estuaries has been studied by means of 12 sediment traps. The fine-grained material is associated with flocculation and ... -
Composición y evolución de las lavas de la isla de Branco (Cabo Verde)
(2006)The first data about the composition of lava flows from Branco Island (Cabo Verde) are presented in this work. Most lava flows in the sequence are alkali basalts (Fo84-76 olivine, En44-36 diopside, An83-31 plagioclase) showing ... -
El Edificio Antiguo de la isla de San Vicente (Cabo Verde): características del sector occidental
(2006)A more than 1000m thick pile of basaltic lava flows and pyroclasts dipping seawards rises on the western sector of San Vicente. Several systems of dikes cut across the succession that is composed of two different sequences. ... -
Variación estacional de los contenidos en carbono orgánico, inorgánico y azufre en los sedimentos del estuario de los ríos Tinto y Odiel (SO España)
López González, Nieves; Borrego Flores, José; Morales González, Juan Antonio; Carro Flores, Berta (Sociedad Geológica de España, 2006)
The study of 12 sediment traps located in the Tinto and Odiel river estuary show the influence of the acid contributions in the seasonal variation of the contents in organic carbon, inorganic carbon and sulfur. The seasonal ... -
Las albititas del Paleozoico Inferior del occidente de Asturias: ¿posible fuente de leucogranitos?
In the West Asturian-Leonese Zone there are some albititic beds of volcanoclastic origin interlayered in the lower part of the Serie de los Cabos, deposited in a graben-type basin during the Middle Cambrian. The mineralogy ... -
Estructura del granito de Beariz (Ourense, Galicia)
(2006)The geological map, cross-sections and structural analysis of the Beariz granite are presented. The Geometric and structural characteristics of this intrusive body are in good agreement with a sinkynematic emplacement within ... -
Secuencia de emplazamiento, alteración hidrotermal y metamorfismo en el Complejo Intrusivo de Jörn, distrito minero de Skellefte, norte de Suecia
González Roldán, Manuel Jesús; Allen, Rodney L.; Donaire Romero, Teodosio; Pascual Martínez, Emilio (Sociedad Geológica de España, 2006)
The Skellefte district is one of the most important mining districts in Sweden, located in an early Proterozoic (1.90-1.87Ga) volcanic arc province in the Baltic Shield, northern Sweden. The district consists of a ... -
Situación medioambiental de la marisma Joyel (Cantabria): datos aportados por los foraminíferos bentónicos
(Sociedad Geológica de España, 2006)A total of sixty nine species of benthic foraminifers have been identified in the Joyel-Ria of Quejo marsh (Cantabria, N Spain). Fifty six of those species had living individuals in the time of sampling. Main foraminife ... -
Tasas de erosión en la cuenca de Guadix-Baza durante el Pleistoceno superior - Holoceno
(Sociedad Geológica de España, 2006)Erosion rates in the Guadix-Baza basin have been calculated drawing on a volumetric estimation of sediment loss by river erosion since the late Pleistocene. On this purpose we have perform a reconstruction of the geometrical ... -
Estudio petrológico y geoquímico de las vulcanitas de los afloramientos de El Pimpollar, extremo nororiental de la Zona Surportuguesa
(2006)The Lower Unit of “El Pimpollar” volcanic outcrop (South-Portuguese Zone) is mainly composed of submarine dacites and andesites, with some subordinate basalts and trachyandesites. All these volcanic materials have ... -
Procesos neotectónicos en los depósitos de rasa de la zona de Canero (Occidente de Asturias)
(Sociedad Geológica de España, 2006)The Pleistocene sediments deposited on the emerged marine abrasion platform near Canero village (Valdés, Asturias) are truncated by reverse faults which are parallel to basement bedding. These structures imply a neotectonic ... -
Neotectónica en el norte de Galicia: Fallas inversas de actividad cuaternaria en la cuenca fluvial del alveolo de Alfoz, Lugo
(2006)In the weathered depression developed on the A Toxiza variscan granite (northern Galicia) two high angle reverse faults have been located putting the granitic basement over pleistocene fluvial deposits. Several inferred ... -
Propuesta de clasificación geotécnica del “Efecto Sitio” (Amplificación Sísmica) de las formaciones geológicas de la Región de Murcia
(Sociedad Geológica de España, 2006)In this paper a geotechnical-siesmic amplification classification based on geological data is proposed for the Murcia region, (SE Spain). The structural damages caused during earthquake are controlled by local geological ... -
El Deslizamiento de Güevéjar (provincia de Granada): un caso de inestabilidad de laderas inducida por sismos
(2006)Drawing on historical documents and a detailed field study, we have been able to characterize the Güevéjar landslide as a complex landmass movement with a dominant multi-rotational component. The landslide body is made ... -
Estudio osteométrico preliminar de los restos de ciervo (Cervus elaphus) del yacimiento paleontológico del Pleistoceno Superior de Kiputz IX (Mutriku, Gipuzkoa)
(2006)This work provides the first news about the recovered fauna from the Late Pleistocene site of Kiputz IX (Mutriku, Gipuzkoa). It describes the site stratigraphy as well as the preliminary listing of the identified fauna ... -
Estructuras sedimentarias de deformación interpretadas como sismitas en el Mioceno Superior (Turoliense) de la cuenca de Granada (Cordillera Bética)
(2006)We studied various Upper Miocene (Turolian) layers of superimposed soft-sediment deformation structures induced by liquefaction in the Granada basin (Betic Cordillera). These are principally load structures: sagging and ...
