I think it'd be rather hard for a hunter gatherer society to realistically cover such a large area under tons of rubble. It makes me wonder if this covering with rubble is somehow related to the Black Sea deluge hypothesis [https://en.wikipedia.org/wiki/Black_Sea_deluge_hypothesis]:
> "In 1997, William Ryan, Walter Pitman, Petko Dimitrov, and their colleagues first published the Black Sea deluge hypothesis. They proposed that a catastrophic inflow of Mediterranean seawater into the Black Sea freshwater lake occurred around 7600 years ago, c. 5600 BCE .
> As proposed, the Early Holocene Black Sea flood scenario describes events that would have profoundly affected prehistoric settlement in eastern Europe and adjacent parts of Asia and possibly was the basis of oral history concerning Noah's flood. Some archaeologists support this theory as an explanation for the lack of Neolithic sites in northern Turkey. In 2003, Ryan and coauthors revised the dating of the early Holocene flood to 8800 years ago, c. 6800 BCE."
I think there's a poetic feel to it (which makes me wholly question it); the start of agriculture, Babylon, The Garden of Eden, Noah's ark, all wrapped in one, discovered by a shepherd in the hills and filled with penises.