Doesn't matter, trolls and unnecessary posts should be deleted. That is all off topic my friend. Most of those posts were "you're the best troll ever" *those were pointed at you, Winnies*. But now that I said that, you'll comment on it when it doesn't matter.
And you cannot see the Blazeridge mountains, you can see the northeast section of the Crystal Desert *directly north of Amnoon Oasis*.
I got that from reading the Movement of the world, while it doesn't say direct dates it hints at things. Also made a typo, it's 100 years after EN, not before GW2. 150 years prior to GW2.
You can go
here for the approx dates I've noted and why.
If you are too lazy for even that, let me quote the Orr rising section:
This quote proves it was no later than 100 years after EN that Orr rose:
Quote:
Originally Posted by Movement of the World
Initially, this system was designed as a temporary government for the refugee camps, but in the 150 years since the flood of Lion's Arch, it has become a stable system, a respected government, and a cornerstone of Krytan culture.
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Flooding of LA occured by Orr rising.
Another hint at Orr's rise is that it occured after the info we know of Cantha/Elona - Cantha became isolationist in 1127 AE - 50 years after EotN - over 60 years pass after NF when Joko took over *not when Tyrians lose contact of Elona* -
Quote:
Originally Posted by Movement of the World
The history of Cantha and Elona, as we know it, ceases around the time of Orr's liberation from the sea.
...
In the year 1127 AE, Emperor Usoku, successor to Kisu, took a firm hold of his nation.
...
Within sixty years of Kormir's rise to godhood, Palawa Joko mustered his former power and marched a new army of mummies, zombies, and other undead out of the Crystal Desert into war with Vabbi.
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Thus it was 60-100 years after EN that Orr rose. Wording implies that it was 150 years prior to GW2 (or at least prior to the writing of the Movement).
Edit: Also, those are clouds. If it was snow, it wouldn't be transparent - like the Shiverpeaks are not transparent.
And it is said in the Movement of the World that the undead dragon is the strongest - not primordus. There is also no in-game image of the Orrian dragon or the Deep Sea Dragon. So it wouldn't show them anyways.