2nd Event - 6500-5000 BCE
Dawood et al. (2024) dated the second event on the
Deir al-Assad fault segment to between 6000 and
5000 BCE using
36Cl exposure dating. They
estimated 2.4 ± 0.3 m of
vertical slip.
The same event appears to have affected the Nahf
East fault segment, which was dated to
between 6500 and 5500 BCE, but with a larger
estimated vertical uplift of 6.5 ± 0.3 m.
The Sagur fault segment also appears to record this event,
dated to between 6000 and
5000 BCE, with an estimated vertical uplift of
2.5 ± 0.3 m.
It should be noted that 36Cl exposure dating is
sensitive only to vertical displacement. As a
result,
strike-slip components are not recorded,
and the measured slip values do not necessarily
represent the
total or maximum displacement
associated with the event. In addition,
Dawood et al. (2024:11) caution that some
apparent rupture "events" identified from scarp
exhumation may instead represent either multiple
earthquakes occurring over a span of several
hundred years or a single earthquake that produced
a large amount of slip. For this reason, they
prefer to describe these exhumation episodes as
an "activity period."