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

Evidence for right-lateral strike-slip faulting Near Shirvan we observe uphill facing scarps, right- laterally deflected drainages, and 5 km of past surface rupture (Fig. 2). The surface ruptures have tenspressional and transtensional step overs creating pop-up and pull-apart features. Scarp heights range from 1 to 5 m and offset drainages from 5 m to 22 m (Fig. 2). Fig. 2: Pleiades derived DEM showing the West Caspian Fault trace near Shirvan. Recent surface ruptures showing stepovers, offset drainages and scarps. At the left stepping trace, we see an increase in elevation bound on each side by rupture strands (Fig. 2B), consistent with transpression. There is also a right step in the surface rupture where we observe a drop in elevation (Fig. 2C), consistent with transtension. These patterns of surface rupture are consistent with right-lateral strike-slip faulting. Further south, near Salyan, we find a fault trace along the western side of a 3 km fold (Fig. 3). The fault trace bends here from N-S to NW-SE. We observe antithetic left-lateral faults displacing vertical beds that are consistent with R’ Reidel shearing (Fig. 3). From a UAV survey and field investigation we observe two offset terraces risers of 54 m and 8 m across the main fault trace (Fig. 4). Salyan Trench site We excavated two trenches perpendicular to the trend of the faulting and one soil pit near Salyan. The trenches cut across a rise in the topography (Fig. 4). The soil pit was excavated on the surface that has a 54 m offset riser (Fig. 4).