Analysis of the Geological Controls and Kinematics of the Chgega Landslide (Mateur, Tunisia) Exploiting Photogrammetry and InSAR Technologies Gaidi, Seifeddine Galve Arnedo, Jorge Pedro Ruano Roca, Patricia Reyes Carmona, Cristina Pérez Peña, José Vicente Azañón Hernández, José Miguel Booth Rea, Guillermo Landslide Rock spread UAV-DP InSAR GEP Geomorphosite Tunisia Exploration of territories not previously analyzed by landslide experts provides interesting findings. The Chgega landslide, in northern Tunisia, represents a paradigmatic mass movement. It can be classified as a complex landslide, or more specifically as vast rock spreading that evolved into a block slide. It involves a great block of limestone—about 900 m long and 400 m wide—sliding over ductile clays and marls. The viscoplastic creep of the clays drives the landslide and creates, in its crown, a graben ~800 m long and ~120 m wide that breaks the summit of Chgega Mountain. Using Interferometric Synthetic Aperture Radar (InSAR) technologies, we demonstrate that this complex landslide is currently active and moreover shows progressive movement without clear episodic accelerations. The velocity of the limestone block is just above 2 mm/yr. The occurrence of gravity-induced joints indicates that the movement has an orientation towards 333◦ of azimuth on average, conditioned by the landscape around Chgega. These results were obtained through the analysis of a 3D model and a high-resolution orthoimage created from photographs acquired by an Uncrewed Aerial Vehicle (UAV). We may conclude that the landslide movement is determined by normal faults with directions N060◦E and N140–150◦E. This characterization of the Chgega landslide can serve as the basis for future studies about the origin of this slope movement. Furthermore, the data provided here may support the recognition of Chgega as a singular geological point that deserves to be declared a geosite. 2021-11-08T09:43:34Z 2021-11-08T09:43:34Z 2021 info:eu-repo/semantics/article Gaidi, S.; Galve, J.P.; Melki, F.; Ruano, P.; Reyes-Carmona, C.; Marzougui, W.; Devoto, S.; Pérez-Peña, J.V.; Azañón, J.M.; Chouaieb, H.; et al. Analysis of the Geological Controls and Kinematics of the Chgega Landslide (Mateur, Tunisia) Exploiting Photogrammetry and InSAR Technologies. Remote Sens. 2021, 13, 4048. https://doi.org/ 10.3390/rs13204048 http://hdl.handle.net/10481/71357 10.3390/rs13204048 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España MDPI