DRAFTING OF A GEOSITE PROJECT IN THREE EVOLUTIONARY STAGES The geological importance of the middle But Valley geosite lies in its well-defined sequence of evolutionary stages (Fig. 3), in chronological order: a massive rockslide from Mts. di Rivo and Cucco, which caused a large main scarp and gave origin to a thick chaotic deposit in the valley bottom (about 10,000 years ago). […]
