James Churchward had some interesting theories about a supposed Uighir Empire in
Central Asia in ancient times, as a major offspring of Mu and approximating the
area of the hiostorical Mongol Khanates. It was supposed to have been run by
whites/Caucasians and eventually gave rise tio the Aryans por Indo-Europeans.
About 16000 BC it was overwhelmed by waves of translation from the South which
washed into the Arctic Ocean, leaving gravel banks in Siberia which he claims to
have seen.

I have a couple of research developments on those points which have turned up.
I'll take the last point first.

The water-lain deposits which Churchward claimed in Eastern Siberia ARE there
but the date is controversial. In about 16000 BC or 18000 BP, there was a
regression from the glacial maximum going on and several mountain glacier blocks
were melting: because of the way the rivers flow in that part of Siberia, the
washings from the melting glaciers would in fact be headed northward into the
Arctic Ocean. This DOES imply that the mountains were there before the event for
the glaciers to have formed on them.

The ruins found in the Gobi Desert have nothing to do with this period, or even
Uighirs especially. They were of Roman or Dark-Ages vintage and were buried in
desert drifts. One of the structures buired in this Khotan location retains
traces of a mural added by a wandering Roman artist, who signed the piece with
his name (in Latin)

I did check the Cambridge Encyclopedia of Archaeology (edition circa 1990) and
there is a chart in the back showing the development of the standard races of
humanity up to 30000 BC and it does have about the area of Churchward's "Uighir
Empire" marked as belonging to the Proto-Caucasoids. This follows Carleton Coon
and his classification is not generally followed today. From what I know of the
human fossils in the area, they are closer to Australian Aboriginals than to
modern Europeans, and from what I understand of human genetics at the time, the
peoples to become Mongoloids, Caucasoids and American Aboriginals (by the
standard classification) were only just starting to differentiate from one
another.

In any event, the Uighirs themselves had nothing to do with it, being a Turkic
people of recent derivation. And actually what Churchward was referring to as
the "Lost White Race of Central Asia" were a peculiar branch of Indo-Europeans
known as the Tocharians, related to the Chinese-mummy people. They were most
closely related to the Celts and in fact have some cultural ties to the
Hallstatt culture known Archaeologically in Europe.

Best Wishes, Dale D.