Estudio geológicos del área esquitosa de Galicia Central (zona de Lalín-Forcarei-Beariz)

[Resumen] Las investigaciones efectuadas en el sector Norte del Area esquistosa de Galicia Central han permitido diferenciar tres grupos litoestratigráficos en el conjunto de metasedimentos que aflora en esta zona. Todos los materiales han sido sometidos a una deformación polifásica, cuyas estructuras pueden agruparse en 3 fases principales, además de algunas estructuras tardías. Esta deformación está acompañada de un metamorfismo regional de intermedia-baja presión que alcanza condiciones de la facies de las anfibolitas. En este trabajo se discute además, en base a distintos argumentos, el carácter poliorogénico y alóctono propuesto por autores precedentes para las denominadas Unidades de Lalín y Forcarei.[Abstract] Three main lithostratigraphic groups have been distinguished in northern part of Central Galician Schist Area. Al! these materials have suffered a polyphasic deformation, whose structures can be grouped in three main phases, and some later structures. A regional syntectonic metamorphism of intermediate-Iow pressure reaching anfibolite facies occurs. The polyorogenic and allochthonous character of the Lalín and Fortarei Units, suggested by earlier authors, is discusse

El complejo de dunas eólicas de la Playa de Frouxeira (Meirás-Valdoviño, La Coruña)

[Resumen] Dentro del complejo dunar, situado en la parte posterior de la playa de Frouxeira, se han distinguido varios tipos de dunas : montículos aislados, remontantes, parabólicas y blow-outs y cartografiados en cuatro subzonas: dunas activas, subrecientes, remontantes y fósiles. Se establecen las características texturales de las arenas dunares y de playa, tanto granulométricas como a partir de los índices de correlación lineal entre los diferentes parámetros, además del contenido carbonatado. Finalmente, se determina la evolución sedimentaria y su relación con el resto de la cornisa cantábrica, mediante los datos prehistóricos asociados al medio de depósito[Abstract] Several coastal sand dunes are classified ( isolated mounds, climbing, parabolic and blow-outs ) and they are distributed in four areas: active, subrecent, climbing and fossil ones. Textural patterns as well granulometric parameters as lineal correlation index among them are stablished. Finally, the sedimentary evolution is determlnated by the help of the prehistoric information from the Asturian and Cantabrian region

Nuevas aportaciones al conocimiento de la evolución tectonometamórfica del complejo de Cabo Ortegal (NW de España)

[Resumen] El Complejo de Cabo Ortegal es una unidad a16ctona constituida en gran parte por rocas ultrabásicas, básicas y neises. Estas rocas han sufrido un metamorfismo polifásico en el que se distinguen cuatro episodios, de forma que el grado más elevado se alcanza durante la primera fase (facies granulita y eclogita), teniendo lugar después una retrogradación progresiva hasta la facies de los esquistos verdes. La evolución de la deformación ha tenido también lugar en cuatro fases, de forma que la primera es posterior a los dos primeros episodios metamórficos. Las tres primeras fases de deformación representan una importante deformación por cizalla tangencial, mientras que la cuarta da lugar al amplio sinforme en cuyo núcleo se sitúa el complejo. Las rocas de Cabo Ortegal representan probablemente una secuencia ofiolítica subducida durante el Ordov!cico y obducida con posterioridad al Devónico inferior como con secuencia de una colisión continental.[Abstract] The Cabo Ortegal Complex is an allochthonous unit made up of ultrabasic rocks, basic rocks and gneisses. These rocks have suffered a poliphasic metamorphism in which four episodes can be established. The highest degree of metamorphism (granulitic and eclogitic facies) took place during the first phase followed a~erwards by a progressive retrogresion to greenschist facies. Four phases of deformation can also be distinguished being the first later than the first two metamorphic episodes. The three earlier tectonic phases represent an important sheardeformation while the forth gives way to the wide sinform of Cabo Ortegal. The rocks of the Cabo Ortegal Complex would be an ophiolitic sequence subducted during Ordovician times and obducted after the lower Devonian, due to a continental collision

Micro- and macro-porosity of dry- and saturatedstate recycled aggregate concrete

Society is becoming aware of the environment and progressively using more recycled aggregates to produce recycled structural aggregate concrete. In addition, many researches have analysed the properties of hardened recycled aggregate concrete, but few of them have focused on the mixing method and the consequences that it has on the properties of concrete. In this research, recycled aggregate concrete using dry, with extra water supply, and saturated recycled aggregate has been prepared. The different mixing conditions induce differences the micro and macroporosity of concrete that have been evaluated by computerized axial tomography, scanning electron microscopy and a new developed methodology, based on digital image analysis, developed to analyse the distribution and size of macroporosity. The software has been implemented in Matlab© and is available to the readers of the journal for downloading and use. The results show that the dry and saturated recycled aggregate lead to very different concrete properties. On the one hand, the use of dry aggregate causes a local reduction of the w/c ratio, increasing heterogeneity and decreasing workability. On the other hand, the saturated aggregate incorporates extra water by adsorption that causes an increase in the water/cement ratio, thus increasing the porosity volume and size of the new mortar of the recycled aggregate concrete

Interaction of 8 He with 208Pb at near-barrier energies: 4 He and 6 He production

Spanish Ministry of Economy and Competitiveness-FPA-2010-22131-CO2-01 (FINURA) y FPA2013-47327-C2-1-RMinistry of Science and Higher Education of Poland-N202 033637National Science Centre of Poland-2013/08/M/ST2/00257 (LEA-COPIGAL) y 2014/14/M/ST2/00738 (COPIN-INFN Collaboration)European Science Foundation-EUI2009-04163432 (EUROGENESIS

Study of the near-barrier scattering of 8 He on 208 Pb

The structure and dynamics of 8He have been studied through the collision process with a 208 Pb target at energies of 22 and 16 MeV, above and below the Coulomb barrier, respectively. The energy and angular distributions of the elastically scattered 8He and the 6,4He fragments were measured. In this paper, we discuss the method used to determine the effective position of the beam spot on the reaction target and the scattering and solid angles of each pixel of the detector array.Ministerio de Economía y Competitividad PA2010-22131-C021-01, FPA2014-59954-C3-1-PMinistry of Science and Higher Education of Poland N202 03363European Science Foundation EUI2009-0416

Elastic scattering of 8He + 208Pb at 22MeV

The dynamics of 8He around the Coulomb barrier is investigated by measuring the energy and angular distribution of the elastic 8He and the 6He and 4He fragment yields in the collision process with a 208Pb target. The experiment was carried out at SPIRAL/GANIL in October 2010. The experimental results will provide information about the relevant reaction mechanisms and the validity of the optical model (OM) when applied to exotic nuclei. In this paper, details of the experimental setup and preliminary results on the elastic scattering for the collision at 22 MeV are presented.Spanish Research Council FPA-2010-22131-CO2-01Ministry of Science and Higher Education of Poland N202 03363

Museo de Anatomía: su gestión por parte del personal auxiliar docente

Desde abril de 2011, en el hall central del primer piso de nuestra facultad funciona el Museo de Anatomía Humana Normal "Dr. Poli". A instancias del actual Prof. Titular, Dr. Julio C Hijano, las tareas operativas se encuentran a cargo de la planta Auxiliar Docente, estudiantes de la carrera de Medicina que se desempeñan como ayudantes alumnos ad honorem y rentados en la Cátedra de Anatomía B.Facultad de Ciencias Médica

Museo de Anatomía: su gestión por parte del personal auxiliar docente

Desde abril de 2011, en el hall central del primer piso de nuestra facultad funciona el Museo de Anatomía Humana Normal "Dr. Poli". A instancias del actual Prof. Titular, Dr. Julio C Hijano, las tareas operativas se encuentran a cargo de la planta Auxiliar Docente, estudiantes de la carrera de Medicina que se desempeñan como ayudantes alumnos ad honorem y rentados en la Cátedra de Anatomía B.Facultad de Ciencias Médica