
handle: 10272/11826
The Olio de sapo anliform in the northwest Iberian Massif is made up of superposed allochthonous units of Paleozoic metasediments and Ordovician orthogneisses, similar to gneissic domes in the eastern Pyrenees and in the Montagne Noire of southern France. Their association with Hercynian fold-nappes of comparable lithologies and structure points to a formerly continuous structure later sheared apart in the late Hercynian dextral megashear (North Pyrenean fault) which affected the Pyrenees and southern France and was also responsible for the formation of the domes La antiforma del Olio de sapo en el noroeste del Macizo Ibérico está constituida por unidades alóctonas superpuestas con metasedimentos paleozoicos y ortogneises ordovícicos, similares a las existentes en los domos gneisicos de los Pirineos orientales y en la Montaña Negra del sur de Francia. Están asociadas en ambos casos a grandes mantos de pliegues tumbados de litologfa y estructura comparables, lo que indica que se trata de estructuras hercínicas originariamente continuas y posteriormente separadas por una megacizalla hercínica paralela a la cordillera pirenaica (falla Norpirenaica), cuya actividad contribuyó a la formación de los domos
Montagne Noire, Macizo Ibérico, Hercínico, Iberian Massif, Pirineos, Hercynian, Pyrenees, Ibero-Armorican arc, Ollo de sapo, Arco Ibero-Armoricano
Montagne Noire, Macizo Ibérico, Hercínico, Iberian Massif, Pirineos, Hercynian, Pyrenees, Ibero-Armorican arc, Ollo de sapo, Arco Ibero-Armoricano
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