Geneva - Unstable areas - Geneva Territorial Information System

There are three types of instabilities:

Superficial landslides

On slopes where the surface layer is in a state of limit equilibrium, a temporary deterioration of the quality of the soil, by saturation during rains, in particular, causes either flows without net limits. (solifluction), or slides with superficial tearing exposing the surface.

Deep Slips Deep

slips are characterized by the presence of generally multiple, well-marked pull-out niches, with a movement of a mass of loose or rocky material along one or more sliding surfaces at depth and depth. of least resistance.

The landslides

This phenomenon is generally observed in the cliffs of ancient alluvium or moraine silty pebbles very compact. Gradually, in a slow process, landslides lie down and can become superficial landslides before stabilizing.