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

et al., 2022; Salazar et al., 2022). Record suggesting the occurrence of a major Mw9.5 earthquake that triggered a tsunami that likely decimated early populations along the entire coast of Northern Chile approximately 3,800 years ago, are available between the Atacama and Tarapacá regions (Salazar et al., 2022). Consequently, the hyper-arid and tsunamigenically active coastline of the Atacama region can be considered a suitable area for the study of paleotsunami records that has been poorly described (Abad et al., 2020). Specifically, the mouth of the Carrizal ravine includes a wetland-lagoon system, presenting geological, geomorphological, ecological, and hydrogeological features. Its sedimentary record allows for the reconstruction of the evolution and geological history during the Late Holocene of this coastal sector. Figure 1: Location of Carrizal Bajo (red square), large tsunamigenic earthquakes since late 19th century, and major historical earthquakes in the subduction margin of the Nazca plate beneath the Southamerican plate in the last 300 years (from Easton et al., 2022, and references therein).