The investigation of deformations in Quaternary deposits holds primary importance in understanding recent geological history and natural hazards in highly populated areas, such as the Po Plain. While civil excavations and trenches possess the potential to be pivotal in identifying and characterizing these deformations, they often remain underused due to the stringent regulation framework and timetables governing civil construction works. In this study, we demonstrate how digital photogrammetry and digital outcrop modelling (DOM) are useful techniques for obtaining a permanent digital representation of a trench situated in Castelletto Ticino (Po Plain–Southern Alps transition). This trench exhibits Holocene deformational structures: (i) an overall tilting of sedimentary deposits towards the SW; (ii) folds with a NE–SW trend; (iii) slumping and other soft-sediment deformations structures; and (iv) reverse faults with NE–SW and NW–SE directions. Using radiocarbon and archeological dating, we are able to confidently constrain the age of these deformations to between 8760 and 400 years BC, suggesting recent tectonic activity related to buried thrust faults.
Bibliographical noteKAUST Repository Item: Exported on 2023-09-27
Acknowledgements: This research received no external funding. We would like to thank Alessandro Vandelli for developing the Digital Outcrop Model (DOM) and the Soprintendenza Archeologia Belle Arti e Paesaggio per le Province di Biella Novara Verbano-Cusio-Ossola e Vercelli (Ministero della Cultura) for allowing its use.
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)