Deduction of a tectonic phase prior to the Senonian in Les Conclues gap (South-Pyrenean marginal ranges, Huesca - Lleida, Spain)
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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 Rhaetian - Hettangian. This tectonic phase should be added to the succession of alpine phases, that affected the Central South-Pyrenean Unit in 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.
Key words: Tectonics, Jurassic, Upper Cretaceous, Pyrenees, Catalonia, Aragon, Spain.
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 Rhaetian - Hettangian. This tectonic phase should be added to the succession of alpine phases, that affected the Central South-Pyrenean Unit in 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.
Key words: Tectonics, Jurassic, Upper Cretaceous, Pyrenees, Catalonia, Aragon, Spain.
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Ullastre, J.; and Masriera, A. “Deduction of a tectonic phase prior to the Senonian in Les Conclues gap (South-Pyrenean marginal ranges, Huesca - Lleida, Spain)”. Treballs del Museu de Geologia de Barcelona, vol.VOL 15, pp. 65-80, https://raco.cat/index.php/TreballsMGB/article/view/120275.
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