The geomorphological and kinematic evolution of the Anzola landslide (Northern Apennines, Italy)

摘要

The Anzola landslide was studied using a multidisciplinary approach, in which geomorphology, geology and geomechanics are combined in attempt to understand the kinematic evolution, the main rock mass characteristics and the behaviour of the landslide and its morphologic evolution. It is a compound rock-slide/debris-flow fallen on the left side of the Ceno Valley. It's probably a neo-activation and was re-activated three times recently (1996, 1999 and 2000) in connection with heavy precipitations. It also twice caused the blockage of the valley with the formation of a small lake. The phenomenon, about 700 m long 300 m width and 15 m of average thickness, involves a Helminthoid flysch sequence (Caio Unit) characterized by thick bedded marls and marly-limestone and thin bedded shales and sandstones. Although if the movement is essentially rotational, the scarp and the flanks are controlled by tectonic fracturing.