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The role of strain localization in magma injection into a transtensional shear ...
Pereira, M Francisco; Chichorro, M; Fernández, C; Silva, JB; Matias, FThis study deals with the interaction between deformation and magmatism in mid- to deep-crustal domains. The relation is analysed between migmatites and shear zones and the spatial distribution of leucogranitoid veins and dykes running through a footwall migmatite system, and reaching a transtensional shear zone operated under amphibolite- to greenschist-facies metamorphic conditions (Boa Fé shear zone, Varisca...
Permo-Carboniferous magmatism in the core of Pangaea (Southern Pyreness): a pos...
Pereira, M Francisco; Castro, A.; Chichorro, M.; Fernandez, C.; Diaz-Alvarado, J.; Marti, J.; Rodriguez, C.In southern Europe and the western Mediterranean, Permo-Carboniferous magmatism is well represented in areas of Iberia, the Alps, Sardinia and the Balkan Peninsula. In Iberia, the magmatism that has been related to the Variscan orogeny is associated with syn-orogenic events at ca. 350-315 Ma and post-orogenic at ca. 310-295 Ma. In the southern Pyrenees there is Permo-Carboniferous sedimentary basins with a sign...
Development of E-learning in higher education and future directions
Uhomoibhi, J.O; Palma, J.; Alves, Paulo; Elpebion, Y.; Restivo, T.M.; Piteira, M.R.; Soares, F.O.; Fernandez, C.The present paper is based on the work of the ‘Future of E-Learning Group’, a constituent of the EUNIS E-Learning task Force. The group has set up a number of tasks to fulfill its role, one of which, is seeking and disseminating information on the development of e-learning with a view to ensuring the right guide is provided for progress into the future. In our work to date, in this era of globalization, we ques...
Cambrian ensialic rift-related magmatism in the Ossa-Morena Zone
Chichorro, Martim; Pereira, M. Francisco; Diaz-Azpiroz, M.; Williams, Ian S.; Fernandez, C.; Pin, Ch.; Silva, Jose B.The Late Ediacaran (c. 560–550 Ma) Série Negra sediments of the Évora–Aracena metamorphic belt, Ossa-Morena Zone, SW Iberian Massif, preserve a record of the erosion of an Avalonian–Cadomian magmatic arc and subsequent related turbiditic sedimentation. Detrital zircon from the Série Negra is characterized by predominantly Ediacaran and Cryogenian ages, with few Paleoproterozoic and Archean cores, and a marked l...
Una nueva especie de Gnamptogenys (Hymenoptera: Formicidae) y comentarios sobre...
Lattke,John E.; Fernandéz C.,Fernando; Palacio,Edgard E.The species of the predatory ant genus Gnamptogenys Roger, 1863 from Colombia (42 species) and Ecuador (25 species) are diagnosed and presented, including their known geographical distribution. Gnamptogenys enodis, new species from Colombia is described. Gnamptogenys stellae Lattke, 1995 is new record for Colombia.
Regionalization of oviducts in Boophilus microplus (Canestrini, 1887) (Acari: I...
GARCÍA-FERNÁNDEZ,C.; GARCIA,S. M. L.; SCHNEIDER,F. L.; SEVERINO,A. G.; WINKELMANN,E. C.The structural analysis of oviducts in Boophilus microplus (Canestrini, 1887) in different stages of ingurgitation has indicated that they are constituted primarily of an internal cylinder and an external cylinder with different cell types being found between them. Copulated females in active ingurgitation process show typical variations along the internal cylinder, and three regions can be defined: anterior, r...
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