GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 1.1 GNGTS 2023 Figure 2 . Interpreted orthophoto-mosaic of the Villa Sterpeto trench. The Todari road-cut site We cleaned, gridded, and analysed a pre-existing NW-facing fault outcrop across a secondary strand of the upper splay of the AF. The Orto-photomosaic of the Todari road-cut is shown in fig. 3. Here the fault zone is distributed and characterized by antithetic and synthetic fault strands. The main fault strand is dipping 40° toward the north-east. The footwall of the main fault, and the bottom of the hanging wall are made of sand and gravel belonging to the Citerna unit. A palustrine depositional sequence is faulted and dragged against the fault and overlayed by younger, fault-related, colluvial deposits. A filled fissure located at the hanging wall of the main fault helps to constrain the youngest slip history of the fault. Even in this case we collected samples for radiocarbon dating of the bulk sediment. According to our interpretation it is possible to recognize at least three surface faulting earthquakes that occurred between the XIV-XV century CE and 0.3 ka BCE.