This is getting fun. Did you find the Square Cirlces resource on your own or did you notice the source in the "origins" question you asked in the upper portion of this topic/thread? The racial migrations research is a treasure trove, IMO.
Did you see how that Andite essay cites the work of Graham Hancock's research off of India's coast?
Here are more sections from the UB hinting and corroborating with GH's book Underworld:
These events occured sometime between 35,000 and 15,000 BCQuote
The early expansion of the violet race into Europe was cut short by certain rather sudden climatic and geologic changes. With the retreat of the northern ice fields the water-laden winds from the west shifted to the north, gradually turning the great open pasture regions of Sahara into a barren desert. This drought dispersed the smaller-statured brunets, dark-eyed but long-headed dwellers of the great Sahara plateau.
. . .
About the time of these climatic changes in Africa, England separated from the continent, and Denmark arose from the sea, while the isthmus of Gibraltar, protecting the western basin of the Mediterranean, gave way as the result of an earthquake, quickly raising this inland lake to the level of the Atlantic Ocean.
Presently the Sicilian land bridge submerged, creating one sea of the Mediterranean and connecting it with the Atlantic Ocean. This cataclysm of nature flooded scores of human settlements and occasioned the greatest loss of life by flood in all the world's history. Page 890 & 891.
The second Eden was the cradle of civilization for almost thirty thousand years. Here in Mesopotamia the Adamic peoples held forth, sending out their progeny to the ends of the earth, and latterly, as amalgamated with the Nodite and Sangik tribes, were known as the Andites. From this region went those men and women who initiated the doings of historic times, and who have so enormously accelerated cultural progress on Urantia.
This paper depicts the planetary history of the violet race, beginning soon after the default of Adam, about 35,000 B.C., and extending down through its amalgamation with the Nodite and Sangik races, about 15,000 B.C., to form the Andite peoples and on to its final disappearance from the Mesopotamian homelands, about 2000 B.C. Page 868
At this point we're getting completely off-topic from Kees's orginal question so maybe we should start a different thread, perhaps.
Also, the UB corroborates Graham's research about the writing of the Vedas around 1200 BC... see link:
There's so much here so bite off what you want and I will discuss any gladly. I expect Gene to help us out any moment with his diverse perspectives too.