Two distinct types of landslides occur in the colluvium. The two types have different morphologies and kinematic behavior, and they appear to be triggered by different stimuli. The most striking difference between the two types of landslides is in thickness. Thin landslides, less than 2 m thick, occupy the upper parts of hillslopes where the colluvium is thin. Thick landslides, more than 2 m thick, occupy the lower parts of the slopes.