New data and interpretation of the huge clastic deposit of "La Pineda hill" (Vajont valley, northern Italy)

Carlo Esposito (a,b), Begoña Sánchez Cabanillas (a) & Francesca Bozzano (a,b,c)
(a) Department of Earth Sciences , Sapienza University of Rome, Piazzale Aldo Moro, 5, 00185, Rome, Italy. E-mail: carlo.esposito@uniroma1.it (b) CERI Research Center of Sapienza University of Rome, c/o Department of Earth Sciences , Sapienza University of Rome, Piazzale Aldo Moro, 5, 00185, Rome, Italy. (c) NHAZCA S.r.l. Spin-off of Sapienza University of Rome, Via Cori, snc, 00177, Rome, Italy.

This paper focuses on a detailed study of the huge landslide deposit of "La Pineda" hill (Vajont Valley, northern Italy). The final aim is to define the geometric reconstruction of the landslide body and the transportation mechanism. This work is based on field investigations, data from a stratigraphic borehole and bibliographic data. As a result, we present a detail geological map of "La Pineda" hill and some cross sections that show the geometrical relationship between the landslide deposit and surrounding and underlying deposits. Finally, based on sedimentological, morphological and morphometric features of the deposit we conclude that the massive rock slope failure that produced La Pineda landslide evolved as a rock-avalanche.

Rock-avalanche, post-failure mechanism, "La Pineda" hill, Vajont valley.