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

342 PATA Days 2024 OSL dating gives an age of 19.4 ± 1.1 Ka for unit A, much younger than expected by other studies (Silva et al., 2008). These Fault strand, along with others, are visible in different outcrops in the area Garganta 1 (G1), Garganta 2 (G2) and Casa Conde (CC) (Fig. 2). In all three outcrops, the fault affects the entire stratigraphy, exhibiting several traces in a positive flower configuration. Units can be correlated from one outcrop to another, belonging to the Q4, Q3, and Q2 generation fans. Striations have been found at all three sites, indicating a rake between 0 to 10°. OSL samples have been taken also in these outcrops to better constrain the fault behaviour. The results of these dating will allow us to give a chronology for the different generations of alluvial fans as we collect samples from the Q2, Q3 and maybe Q4. C O N C L U S I O N S The PF is a mainly left lateral fault with a notable expression at surface, as different tectonic structures can be found by studying its morphotectonic expression. First OSL dating has been conducted obtaining a younger age than expected based on previous studies. With this initial age result, new slip rates can be estimated, likely providing more reliable and precise data than the previous ones. Also, the different sites prove the PF activity during the late Upper Pleistocene. This work represents an initial step towards the detailed characterization of the PF. In future steps, further investigation of the fault from a paleoseismic standpoint should be pursued in different locations to gain a broader perspective, particularly in areas with more modern materials, in order to determine its most recent activity. A C K N O W L E D G E M E N T S This work has been conducted under the frame of the NSOURCES project (PID2020-119772RB- 100), funded by the Spanish Ministry of Economy, Industry and Competitiveness.