Proceedings of the 12th International INQUA meeting on paleoseismology, active tectonic and archaeoseismology

352 PATA Days 2024 R E S U LT S Geomorphological analysis and mapping (Figure 1) revealed evidence of recent and ancient overwash fans, suggesting past tsunami inundation events (e.g. Costa et al., 2015). From sedimentary facies analysis we identified five events (A, B, C, D, and E) interpreted as possible or probable tsunami deposits based on various criteria, including: (1) Grain size distribution similar to present-day overwash fans; (2) Erosive bases and presence of rip-ups; (3) Sedimentary record extending > 1 km inland (e.g. Goff et al., 2012); (4) Deposit thickness and benthic fauna content; (5) Positive anomalies in heavy minerals, Fe2O3, MgO, and CaO; (6) Evidence of base-level changes associated with the depositional event. Fig. 2: Facies and sedimentary facies associations recognized in test pit 1 (CL1). a) Facies observed in test pit CL1. b) Facies associations observed in CL1. The events inferred as possible or probable extreme events are related to facies association AF4.