By André Michard, Omar Saddiqi, Ahmed Chalouan, Dominique Frizon de Lamotte
Morocco is among the so much interesting lands on the planet from the perspective of its geological constitution and evolution. Our wisdom at the geology of the rustic has been vastly stronger over the past many years, in response to a number of seismic profiles and boreholes, seismological research of focal mechanisms, seismic tomography, gravimetric/geodetic modelling and, however, in response to an immense nationwide software of Geological Mapping together with glossy geochemical analyses (trace components) and trustworthy isotopic datings (39Ar-40Ar, U-Pb zircon, Sm-Nd, etc). furthermore, a few educational reports were played in relation with the expanding variety of Moroccan universities. consequently, there has been an utmost urgency to adopt a brand new treatise of Moroccan geology which can alternative for the classical El?ments de g?ologie marocaine, released in 1976 via A. Michard within the Notes et M?moires du provider g?ologique du Maroc (re-edited two times when you consider that 1976, with greater than 6000 copies offered, and… translated in eastern for engineers!). a brand new treatise has been ready among April 2006 and July 2007 below the coordination of A. Michard, assisted via O. Saddiqi, and A. Chalouan, via a large panel of authors from Morocco, France or Belgium top-of-the-line connoisseurs of the rustic. with a view to emphasize the final curiosity of the publication, we eventually keep the subsequent name: Continental Evolution: The Geology of Morocco. constitution, Stratigraphy, and Tectonics of the Africa-Atlantic-Mediterranean Triple junction. The enhancing and creation of this e-book was once supported by way of the next businesses: The Geological Society of France (SGF) The nationwide workplace of Hydrocarbons and Mines of Morocco (ONHYM) The overseas Lithosphere application (ILP)
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Extra resources for Continental Evolution: The Geology of Morocco: Structure, Stratigraphy, and Tectonics of the Africa-Atlantic-Mediterranean Triple Junction (Lecture Notes in Earth Sciences)
Contribution to a geodynamic reconstruction of the Anti-Atlas (Morocco) during Pan-African times with the emphasis on inversion tectonics and metallogenic activity at the Precambrian-Cambrian transition, Precambr. Res. 140 (2005) 157–182. M. O. Ed. 2004. , Sismar scientific team, Evidence for active subduction beneath Gibraltar, Geology 30 (2002) 1071– 1074. , The Central Atlantic Magmatic Province at the Triassic-Jurassic boundary: paleomagnetic and 40 Ar/39 Ar evidence from Morocco for brief, episodic volcanism, Earth Planet.
Michard et al. the Algerian margin that passes westward to predominant strike-slip mechanisms. Maximum horizontal stresses are consistent with NNW-SSE plate convergence, although it is observed moderate clockwise stress rotation along the TASZ. Within the TASZ relevant seismicity is characterized by predominantly sinistral strike-slip faulting associated with some normal faulting, revealing a left-lateral (transtensive) regime. The compressional deformation in the plate boundary resumes in the westtrending segment of the seismic zone up to the Gorringe Bank west of SW Spain (Fig.
1) within the NE-SW oriented Anti-Atlas Paleozoic fold belt (cf. Chap. 1, Fig. 4). Each inlier corresponds to a structural culmination of the Variscan fold belt (Chap. 3), but crops out frequently at elevations lower than the overlying, less easily eroded Cambrian sediments, which explains their traditional name “boutonni`eres” (Fig. 2). The exhumation of the Precambrian antiformal boutonni`eres in the Anti-Atlas axis occurred through erosion of their Paleozoic cover during the Late Carboniferous-Permian, just after the Variscan orogeny, then during the TriassicJurassic, when the Anti-Atlas formed the shoulder of the Atlantic and Atlas rifts, and eventually during the Late Eocene-Pleistocene, contemporaneously with the uplift of the Atlas belt itself.