We've spoken about Boulder Downs before in the Coil speculation thread. One thing we all agreed on is that Boulder Downs is NOT related to Dalamud. The major difference is the nature of the corrupter crystal. It's color is much deeper than that found in Dalamud crash sites. It's also dull and inactive, whereas the crystal at Dalamud crash sites is bright and volatile. Crystal is also formed in a dome, as if it was enveloping the Allagan structure that stands inside of it. If anything, the only relation Boulder Downs has to Dalamud is that a Dalamud piece probably just uncovered something that was already there.

You can see how we examined the site here: http://forum.square-enix.com/ffxiv/t...ILERS%29/page2