land Article Geomorphological Hazard in Active Tectonics Area: Study Cases from Sibillini Mountains Thrust System (Central Apennines) Domenico Aringoli 1,*, Piero Farabollini 1 , Gilberto Pambianchi 1, Marco Materazzi 1 , Margherita Bufalini 1 , Emy Fuffa 1 , Matteo Gentilucci 1 and Gianni Scalella 2 1 School of Sciences and Technology, Geology Division, University of Camerino, Viale Gentile III da Varano, 7, 62032 Camerino, Italy;
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[email protected] Abstract: In many areas of the Umbria-Marche Apennines, evident traces of huge landslides have been recognized; these probably occurred in the Upper Pleistocene and are conditioned by the tectonic-structural setting of the involved Meso-Cenozoic formations, in a sector of the Sibillini Mountains (central Italy). The present work aimed to focus on a geomorphological hazard in the tectonic-structural setting of a complex area that is the basis of several gravitational occurrences in different types and mechanisms, but nonetheless with very considerable extension and total Citation: Aringoli, D.; Farabollini, P.; destabilized volume. An aerophoto-geological analysis and geomorphological survey allowed Pambianchi, G.; Materazzi, M.; verification of how the main predisposing factor of these phenomena is connected with the presence Bufalini, M.; Fuffa, E.; Gentilucci, M.; in depth of an important tectonic-structural element: the plane of the Sibillini Mountains thrust, Scalella, G.