I have had a look at trying to assign a timeline period to Uvs Nuur.
Its OUV derives from its current ecosystems which exist because of the closed "Endorheic" basin and the Uvs Nuur lake at the centre. There seem to be 2 approaches to choosing a time period.
Choose the period which
a. created the current ecological "mix". This will inevitably lead to the choice of "Holocene" since enormous changes and fluctuations have occurred across time since the creation of the "Basin". For instance - long periods when there were huge, small, medium or no lakes, glaciation or no glaciation etc etc. There seems no reason to choose any one of these earlier variable states over any other - other than to conclude that, since the current situation is what has been inscribed, then it should take primacy - and thus go for "Holocene"!
b. created the closed basin. One "problem" with this is that geological OUV was specifically excluded from the OUV - but it could still be held that the ecological OUV aspects wouldn't have been created without the basin itself and have exisited/been developing in one form or another since that time! If we adopt that argument we are faced with the problem of identifying when the Endorheic Basin was created. The best academic article I have found is the following thesis from 1968 (!!!). It concentrates on the more recent "Limnological" history (and is therefore also of interest if we were to go for option a) but does touch on the formation of the Basin itself. This seems the most relevant quote"The Uvs Nuur Basin was formed tectonically. It lies between the Asian and the Chinese plate and is until present tectonically active. Prominent signs of neotectonic activities in Western Mongolia are shifts of some 30m across quaternary alluvial depositions.........These tectonic activites influence the river network as well as the formation of lakes........ The whole area has been dry land since the Permian....... A huge basin formed the Central Asian lake landscape. The present shape of the Basin has been formed during the Alpidic orogeny when the delimiting mountain ranges started lifting and the Khan Khoykhiyn mountains divided the Uvs Nuur Basn from the southern "Valley of Great lakes"
See - http://www.qucosa.de/fileadmin/data/qucosa/documents/9979/DissertationMarkusPaul.pdf
Which raises the question - when was the "Alpidic Orogeny"??
Wiki says "The Alpine orogeny or Alpide orogeny is an orogenic phase in the Late Mesozoic (Eoalpine) and the current Cenozoic that has formed the mountain ranges of the Alpide belt. These mountains include (from west to east) the Atlas, the Rif, the Baetic Cordillera, the Cantabrian Mountains, the Pyrenees, the Alps, the Apennine Mountains, the Dinaric Alps, the Hellenides, the Carpathians, the Balkan Mountains, the Taurus,the Armenian Highlands, the Caucasus, the Alborz, the Zagros, the Hindu Kush, the Pamir, the Karakoram, and the Himalayas."
So - although the orogeny is named after the Alps its effects cover a vast area of mid-latitude Eurasia and N Africa - "The Alpine orogeny is caused by the continents Africa and India and the small Cimmerian plate colliding (from the south) with Eurasia in the north. Convergent movements between the tectonic plates (the Indian plate and the African plate from the south, the Eurasian plate from the north, and many smaller plates and microplates) had already begun in the early Cretaceous, but the major phases of mountain building began in the Paleocene to Eocene. The process continues currently in some of the Alpide mountain ranges."
Within Option b. we would appear to have a choice between Cretaceous, Paleocene or Eocene!! The Nomination File is silent on these matters. No doubt further searches on the Web might discover something BUT -if the view is that Holocene is more appropriate a Timeline period for this WHS than the much earlier creation of the Basin then it doesn't seem worthwhile!
Any views regarding which of option a or b we should choose??