with a maximum height of 3 m. Paleozoic Granites (Complesso Granitoide del SulcisArburese) constitute the bedrock. They are deeply altered and friable, showing the typical arenization at the surface. Limited Pleistocene and Holocene sediment covers are present in the lower valley areas. This region is characterized by hilly and undulating terrain which extends to the coastline, and represent a specific landscape characterized by steep ridges, high peaks, deep valleys and gorges. Figure 1 depicts the study area and the locations of the CPs collected from a topographic map with a scale of 1:10.000.