For sharing the Iraq Report with images ..
I am a believer in the aggregate theory! I think we will also find it was used in Peru at many sites including the teeth of the Puma at Sacsahuaman, and perhaps even in other farther afield work of that age/people.
It would be wonderful if someone would find that rock softening plant (so seemingly in evidence at Markahuasi) ... and check it's chemistry. It may have been the impetus to the early beginnings of aggregate work ....
Chemistry was certainly known to the ancients.
Beware the Adze!
Beware the land it came from.
... ... ...
That chisel of metal ~bi3 n pt~
With which he opened the mouths of the gods.