Looks like Sumeria was the source for the Egyptian flourish and presumably the long skulled visitors moved down there to become the Pharaohs and high priests .
BUT why did the Sumerians disappear and presumably shuffle on down to the Nile , but would not leave ( or were not allowed to,) before they covered up ( buried ) Gobekli Tepi ?
Many believe that the Great Flood around 10 000 BC was the prime cause but where is the flood evidence in/on GT?
If not the flood , why was GT abandoned ?
Göbekli Tepe, Neolithic site near Şanlıurfa in southeastern Turkey.
The site, believed to have been a sanctuary of ritual significance, is marked by layers of carved megaliths and is estimated to date to the 9th–10th millennium bce.
Encyclopedia Britannica › place