A comprehensive investigation of the regional distribution, pattern and types of landslides was completed in the Umbria-Marche region of Central Italy. Landslide occurrence was ascertained through medium-scale inventories and detailed geomorphological investigations carried out in pilot areas in different lithological environments. Landslide types and pattern were identified within each of the five lithological complexes cropping out in the region, namely: carbonate, flysch, Ligurian allochthonous complex, volcanic rocks, and post-orogenic sediments. Failures were found to be controlled by the relative position of sedimentary and tectonic discontinuities, by the relative abundance of hard versus weak or soft rocks, and by the attitude of permeable and impermeable layers. Despite the considerable geological and geotechnical heterogeneity, similarities between landslide types and patterns were observed across physiographic boundaries. Five landslide-related geomorphological settings were identified, namely: the presence of discontinuities dipping toward the free face of slope (dip slope) or into the slope (reverse slope), the occurrence of a hard cap overlying ductile sediments, the presence of colluvium, the outcrop of homogeneous clay, and the outcrop of hard rocks along steep slopes.

This content is PDF only. Please click on the PDF icon to access.

First Page Preview

First page PDF preview
You do not have access to this content, please speak to your institutional administrator if you feel you should have access.