I just found this Sam, what an informational post. Your information ties in with what I have long learned from many books on the subject. There indeed was an advanced civilization here before the Sumerians. We only hear the last echoes of them through myth and legend. But now, as we look into the earth, more pieces of the puzzle emerge.
Many ancient cultures describe "Sky People" that were here before they were. Also races that came from, or returned to their underground abode. If we look at the record of the Giants (Annunaki and assorted tribes ) it almost looks like something chased them out of the Middle East, throughout Europe, North America and possibly a last stand in South America and the Pacific.
The pyramid shape itself is very durable, and is exactly what one would use to last throughout the ages. There are too many hints of a "Golden Age" of advanced knowledge that has been lost to us (or hidden away) to be ignored.
I have not read part one of this work yet, so don't know if you have covered Shinkana and other locations like it around the world. (More references found under "Chinkana" known as "the place where one gets lost")
Source
It seems more and more that we need to keep digging to find the answers To the questions of the past and spark a new Golden Age of our own.
Thanks for the Shinkana link. Was not aware of that one till now. There are so many things like this which all point to the ancient advanced civilisation theory. I feel like we are at the point now where we really must acknowledge this reality and as you say... get that Golden Age going again.
We surely can't be too far now!