Deducción de un accidente tectónico anterior al Senoniense en la clusa de Les Concluses (Sierras marginales sudpirenaicas, Huesca- Lleida, España)

• Autores: Juan Ullastre Martorell, Alícia Masriera
• Localización: Treballs del Museu de Geologia de Barcelona, ISSN 1130-4995, Nº. 15, 2007, págs. 65-80
• Idioma: español
• Enlaces
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• Resumen

  • The discovery of a tectonic phase prior to the Santonian in the Sierras marginales (S of the Montsec, Central South-Pyrenean Unit) satisfactorily accounts for the juxtaposition in this region of a compartment to the N, that has a very complete Jurassic (Lias-Dogger-? Malm) with another to the S (of almost 600 Km²), in which the stratigraphic units prior to the Upper Cretaceous transgression are limited to the Rhaetiab - Hettangian. This tectonic phase should be added to the succession of alpine phases, that affected the Central South-Pyrenean Unit inb its entirety before the Middle- Upper Eocene. Once again this shows the complex evolution of the south side of the Pyrenean orogen, not adequately explained by simple, generally accepted models.