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Discussion about the emplacement of some of the Southern Pyrenees nappes (Spain)

AutorSolé Sugrañes, Lluís
Palabras clavePyrenees
Fecha de publicación1983
EditorCSIC - Instituto de Ciencias de la Tierra Jaume Almera (ICTJA)
CitaciónActa Geológica Hispánica, t. 18 (1983), nº 1, págs. 47-53
ResumenThe Southern Pyrenees or the Prepyrenees as the Spanish geologists use to refer them are one of the main tectonic units of the Pyrennes and extend for more than 600 km from east to west. They separate the cristalline Paleozoic axis to the north of the wide flat expanse of de Ebro basin to the south (fig. 1). Seguret (1972) and Garrido and Rios (1972) proved that the Pyrenees are formed by superimposed nappes and slices of Mesozoic and Paleogene rocks that glided southward some tens of kilometres. Althoung the ailochthonous origin of some of these unit had already been suggested by the earliest geologist working in the Pyrenees (Dalloni, 1913, 1931; Jacob et al., 1927) their point of view was not widely accepted until the middle of the seventies. Nappe emplacement spans from the Early Eocene to the Oligocene and its mechanism and style of deformation changes throughout the orogenic process (Solé-Sugrañes, 1978 a; 1979). The time of the emplacement and the paleogeographic conditions mark the difference among the nappes and smaller ailochthons that forms the Prepy renees.
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