[Roccus]

"At Tell Qarqur and probably at other sites also in the Orontes River Valley, where our site is located, [settlement] continues, and in our case, seems to have probably broadened [during that time]."

Perhaps they were survivalists....sorta the Tea Partiers of that era. They saw what was coming, stocked up and defended themselves against the zombies.

[SunkenCiv]

Jericho (for example) built its (prehistoric) rampart around the time of the Black Sea flood, which led Ryan and Pitman to attribute the wall to a need for defense against a large migrating group.