Geologica acta

Geologica acta Encontrados 7 registros  La búsqueda tardó 0.02 segundos. 
1.
17 p, 8.4 MB Microstructural and geochemical analysis of Paleoproterozoic pseudotachylytes in Río de la Plata craton, Tandilia belt, Argentina / Frisicale, M. C. (Universidad Nacional del Sur (Argentina). Departamento de Geología) ; Dimieri, L. V. (Universidad Nacional del Sur (Argentina). Departamento de Geología) ; Dristas, J. A. (Universidad Nacional del Sur (Argentina). Departamento de Geología) ; Araujo, V. (Universidad Nacional del Sur (Argentina). Departamento de Geología) ; Fortunatti, N. (Universidad Nacional del Sur (Argentina). Departamento de Geología)
The current study focuses on the analysis of pseudotachylytes from the Azul Megashear Zone, located in the Río de la Plata craton, central Argentina. This shear zone is a strip of mylonitic rocks of more than 40km in length and with a maximum width of 2. [...]
2012 - 10.1344/105.000001744
Geologica acta, Vol. 10, Núm. 2 (June 2012) , p. 85-101  
2.
21 p, 2.5 MB Paleoseismic analysis of the San Vicente segment of the El Salvador Fault Zone, El Salvador, Central America / Canora, Carolina (Universidad Complutense de Madrid. Departamento de Geodinámica, Estratigrafía y Paleontología) ; Villamor, P. (GNS Science) ; Martínez Día, J. J. (Universidad Complutense de Madrid. Departamento de Geodinámica, Estratigrafía y Paleontología) ; Berryman, K. R. (GNS Science) ; Álvarez Gómez, José A. (Universidad de Cantabria. Instituto de Hidráulica Ambiental) ; Capote, Ramón (Universidad Complutense de Madrid. Departamento de Geodinámica, Estratigrafía y Paleontología) ; Hernández, W. (Servicio Nacional de Estudios Territoriales (El Salvador))
The El Salvador earthquake of February 13th 2001 (Mw 6. 6) was associated with the tectonic rupture of the El Salvador Fault Zone. Paleoseismic studies of the El Salvador Fault Zone undertaken after this earthquake provide a basis for examining the longer history of surface rupturing earthquakes on the fault. [...]
2012 - 10.1344/105.000001700
Geologica acta, Vol. 10, Núm. 2 (June 2012) , p. 103-123  
3.
22 p, 1.6 MB Structural and paleomagnetic evidence for non-rotational kinematics of the South Pyrenean Frontal Thrust at the western termination of the External Sierras (southwestern central Pyrenees) / Oliva Urcia, B. (Universidad de Zaragoza. Departamento de Ciencias de la Tierra) ; Casas, A. M. (Universidad de Zaragoza. Departamento de Ciencias de la Tierra) ; Pueyo, E. L. (Oficina de Proyectos de Zaragoza IGME. Departamento de Geología y Geofísica del subsuelo) ; Pocoví Juan, Andrés (Universidad de Zaragoza. Departamento de Ciencias de la Tierra)
The definition of the structure and kinematics of the South-Pyrenean Frontal thrust, to the west of its westernmost outcrop in the External Sierras is the goal of this work. The methodology used is based on the construction and restoration of three balanced cross-sections. [...]
2012 - 10.1344/105.000001704
Geologica acta, Vol. 10, Núm. 2 (June 2012) , p. 125-144  
4.
13 p, 4.6 MB Stable isotope geochemistry of the Ulldemolins Pb-Zn-Cu deposit (SW Catalonian Coastal Ranges, Spain) / Alfonso, Pura (Universitat Politècnica de Catalunya. Departament d'Enginyeria Minera i Recursos Naturals) ; Canet, C. (Universidad Nacional Autónoma de México. Instituto de Geofísica) ; Melgarejo Draper, Joan Carles (Universitat de Barcelona. Departament de Cristal·lografia, Mineralogia i Dipòsits Minerals) ; Mata i Perelló, Josep M. (Josep Maria) (Universitat Politècnica de Catalunya. Departament d'Enginyeria Minera i Recursos Naturals) ; Fallick, A. E. (Scottish Universities Environmental Research Centre. Isotope Geosciences Unit)
The Pb-Zn-Cu deposit of Ulldemolins occurs within the Carboniferous sedimentary series of the southernmost Catalonian Coastal Ranges. It consists of sulphide-bearing calc-silicate assemblages, with epidote, Ca-amphiboles and Ca-garnet, which develop selectively along a dolomicrite bed near the contact with a granite porphyry. [...]
2012 - 10.1344/105.000001707
Geologica acta, Vol. 10, Núm. 2 (June 2012) , p. 145-157  
5.
26 p, 1.3 MB Updated Aragonian biostratigraphy: Small Mammal distribution and its implications for the Miocene European Chronology / Van der Meulen, A. J. (Utrecht University. Faculty of Earth Sciences) ; García-Paredes, Israel (Museo Nacional de Ciencias Naturales (Madrid, Espanya)) ; Álvarez-Sierra, M. Ángeles (Universidad Complutense de Madrid. Departamento de Paleontología) ; Van den Hoek Ostende, L. W. (Netherlands Centre for Biodiversity-Naturalis) ; Hordijk, K. (Utrecht University. Faculty of Earth Sciences)
This paper contains formal definitions of the Early to Middle Aragonian (late Early-Middle Miocene) smallmammal biozones from the Aragonian type area in North Central Spain. The stratigraphical schemes of two of the best studied areas for the Lower and Middle Miocene, the Aragonian type area in Spain and the Upper Freshwater Molasse from the North Alpine Foreland Basin in Switzerland, have been compared. [...]
2012 - 10.1344/105.000001710
Geologica acta, Vol. 10, Núm. 2 (June 2012) , p. 159-179  
6.
8 p, 262.9 KB Influence of latitude and climate on spread, radiation and rise to dominance of early angiosperms during the Cretaceous in the Northern Hemisphere / Coiffard, C. (Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung an der Humboldt-Universität Berlin) ; Gomez, Bernard (Université Lyon 1)
Our aim is to evaluate the influence of climate and latitude on the rise to dominance of angiosperms in space and time during the Cretaceous. The main objectives of the study are: 1) to determine whether a relationship existed between plant biogeographical distribution and Cretaceous climate changes; 2) to explore latitude-dependent forcing on early angiosperm ecology; 3) to propose a mechanism explaining the observed stages of radiation in early angiosperms. [...]
2012 - 10.1344/105.000001701
Geologica acta, Vol. 10, Núm. 2 (June 2012) , p. 181-188  
7.
19 p, 3.1 MB Peat-forming plants in the Maastrichtian coals of the Eastern Pyrenees / Villalba Breva, Sheila (Universitat de Barcelona. Departament d'Estratigrafia, Paleontologia i Geociències Marines) ; Marmi i Plana, Josep Maria (Institut Català de Paleontologia Miquel Crusafont)
The Lower Maastrichtian of Fumanya and neighbouring localities of the Vallcebre syncline (Eastern Pyrenees, Catalonia) provide the first taphonomic evidence for the hypothesis that cheirolepidiacean conifers were significant precursors of Maastrichtian Pyrenean coal. [...]
2012 - 10.1344/105.000001711
Geologica acta, Vol. 10, Núm. 2 (June 2012) , p. 189-207  

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