Event(s) between CH4-E1 and CH3-E2 ? Open this page in a new tab

At the deltaic site of Bet Zeyda (aka Beteiha), just north of the Sea of Galilee (aka Lake Kinneret), three-dimensional paleoseismic investigations were conducted by multiple researchers over a number of years using numerous trenches. The studies examined a series of ~E–W-oriented paleo-channels intersected and sinistrally displaced by the ~N–S-trending active Jordan Gorge Fault, producing a detailed chronology of fault activity over roughly the past 2,000 years, based on radiocarbon dating of detrital charcoal. Once outliers are excluded, this material appears to have a residence time of decades rather than centuries (e.g. see Marco et al., 2005:200). Results indicate that seismic events were more frequent and produced greater fault slip during the first millennium CE than in the second, suggesting the region may be approaching another period of heightened seismic activity.

In their analysis of channel offsets, Wechsler et al. (2018:217, 219) identified ~2.7 m of unaccounted difference between offset channels 3 and 4. They proposed that “there may be a younger event between CH4-E1 and CH3-E2” that left no preserved seismic evidence in the trenches, potentially due to a disconformity in the deposition sequence. They further noted that the missing offset could be “divided between two or three surface ruptures.”

By Jefferson Williams