Slope Instability Processes Affecting the Pietra di Bismantova Geosite (Northern Apennines, Italy)

A geomechanical and geomorphological study was carried out on a vast biocalcarenite slab which is an impressive landmark in the Reggio Emilia Apennines: the Pietra di Bismantova. This area is of great importance since it is a unique feature in the gentle hilly landscape of this portion of the Apennine range. Since the end of the last glaciation, this site has been subject to intense degradation processes affecting the rock slopes and posing serious problems regarding its preservation and the safety of visitors. The goal of this research was to identify the areas most prone to geological hazards and possible risk situations for the numerous tourists visiting this geosite. Observations and analyses have been carried out aiming at the geomechanical characterization of the rock types making up the Bismantova slab. The results have shown that the areas potentially most subject to landslides are the SE, NE and NW faces, where the rock parameters are poorest and degradation processes are particularly intense. Remedial measures should be introduced in these critical areas in order to stabilize the cliff and guarantee safe fruition to all visitors