Synsedimentary tectonics of the Triassic Carbonate Formation of the Oujda Mountains (Eastern Meseta, Morocco): geodynamic implications
M. Oujidi, O. Azzouz, S. Elmi, 2006. "Synsedimentary tectonics of the Triassic Carbonate Formation of the Oujda Mountains (Eastern Meseta, Morocco): geodynamic implications", Tectonics of the Western Mediterranean and North Africa, G. Moratti, A. Chalouan
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The Ladinian-Carnian tectonic instability is well recorded within the Carbonate Formation of the Oujda Mountains (Eastern Meseta, Morocco). It was induced by a bidirectional extensional palaeo-state of stress (ENE-WSW and NNW-SSE) resulting in the development of the Oujda Mountains Triassic basins that open towards the Western Tethyan domain. This extensional event correlates with an early episode of Tethyan rifting, which is coeval with the Ladinian-Carnian extensional episode of the Alpine domain. The structural development of these basins was controlled by an extensional reactivation of Hercynian faults, with N70°E and N160°E fault trends predominating over the N35°E and N120°E ones. Therefore, the Ladinian-Carnian palaeo-state of stress of the Oujda Mountains is fundamentally different from that of the Triassic-Liassic basins to the west, in Central Morocco and the Atlas belts, where the N45°E-trending, sinistral fault trend predominates over the N70°E and N90°E fault trends.
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This book provides an insight into the overall tectonic evolution of the Western Mediterranean region and North Africa. The tectonic setting of the region reflects a long-lived and complex evolution, mainly related to the Alpine Orogeny. This inheritance is expressed by an intricate pattern of arc-shaped mountain chains, the Alps, the Betic–Rif Cordilleras and the Apennine–Maghrebian belt, whose southern branches mark the present limit between the African and Eurasian plates. The volume covers the Maghrebian chains in North Africa, from Tunisia to Morocco and the Western and Central Mediterranean, from Spain to Italy from the pre-orogeric phases (Palaeozoic–Mesozoic) to the post-collisional neotectonic and Quaternary development. It includes both original research papers and syntheses dealing with the aspects of structural, sedimentary, metamorphic and marine geology.