bicicleur 2
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I've been thinking about that too, whether IJ might have split north of the Caucasus somewhere. That, or those "I" lines went north before Basal Eurasian showed up, or the BE just got diluted to nothing through successive mating.
I haven't checked dates of those clades or anything like that; just idle musing.
Bicicleur might have a better handle on it.
my guess is that IJ split 42.9 ka in Transcaucasia
and J stayed in Georgia, Dzudzuana and Ortvale Klde caves
while I entered Europe via Mezmayskaya 39 ka
Some I would have mixed 35 ka with the Kostenki population, which gave way to the Vestonice cluster,
others would not have mixed :
- the El Miron cluster mixed later in western Europe with Goyet 35 ka like
- the Villabruna cluster stayed pretty unmixed till they meat some people from Anatolia some 15 ka
There is also C1a2 in mesolithic Anatolia.
They may be descendants of the Vestonice cluster moving south during LGM.