Abstract
Tectonic-sedimentary evolution of North-Eastern Morocco during Upper Trias : Microtectonic evidences. North-eastern Morocco occupies a hinge zone between two evaporitic basins of the Tethys margin : the Guercif basin in the west and the High Plateau basin in the south. The study of tectonic-sedimentary structures (brittle and viscoplastic strutures) enables to reconstruct and illustrate the control of extensional tectonics on sedimentation. Quantitative analysis led us to distinguish a major state of extensive stress, NNW-SSE orientes (with ENE-WSW permutation of stress), and an other NW-SE extension. The evolution of stress trends determinate here in is correlated with the sedimentary organisation during the Ladinian to Norian. This evolution occured before crustal extension in the Atlantic and Atlasic Moroccan domains.
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