Unit F3 Tsunami Open site page in a new tab
Shtienberg et al. (2020) identified a tsunamogenic deposit (Unit F3) at Dor, dated by OSL dating to between 9.91 and 9.29 ka. The poorly sorted sand layer, containing marine shells and rip-up clasts from underlying wetland deposits, indicates a powerful marine inundation rather than a storm event. The authors estimated that the tsunami had a run-up of at least ~16 m, possibly as high as 40 m, and traveled inland between 1.5 and 3.5 km from the early Holocene palaeo-shoreline. At the time of deposition, global sea level was 40–16 m below present, placing the shoreline considerably farther seaward. To carry marine shells into a contemporaneous fresh-to-brackish wetland, the wave front must have advanced well inland, implying exceptional energy. Shtienberg et al. (2020) interpreted this event as one of the largest known Holocene tsunamis documented along the Levant coast, far exceeding the run-up distances of later, well-recorded events. They proposed that the tsunami was generated by a submarine landslide in the “Dor complex,” located about 16 km west of Tel Dor. They noted that the landslide could have been caused by seismic shaking due to an earthquake along the Carmel Fault and might be analagous to a ca. 10 ka earthquake identified in damaged speleothems by Agnon et al. (2009) "from a cave in the nearby Carmel ridge."



By Jefferson Williams