Relationship between Karstification and Tectonism in the Upper Jurassic Evaporite Formation: A Case Study of the Lalla Fatna Escarpment Safi, Morocco

The Upper Jurassic Evaporite Formation accumulated up to 200 m of interbedded gypsum-carbonates layers across the coastal cliffed region Safi (Morocco) have been affected by karstification process, resulting in karst collapse and subsidence structures associated with faulting, fracturing different types instabilities, which are among main causes natural hazard risk, impacting socio-economic environmental issues. Surface investigation (physiognomic approach) allowed characterization identification deep-seated subjacent gypsum interstratal stages showed that karstic features controlled orientations faults fractures. To highlight relationship between tectonics karstification, this area, fracture were studied, result analysis diagrams that, most cases, landforms regional tectonic features.