I first heard of these 'Moving Rocks' while watching a Discovery Channel Program last year. I find it just facinating! I have told my Wife that we will take a vacation their sometime.. as I want to see this for myself ! A very fragile Eco-system their I am sure.. so would definitely 'Tread Lightly' !
Not the most 'Friendly Environment' either from what I have read about it!
I personally think it is the Water Freezing with the night temps.. and the wind that is moving them.. but it must be swirling in different directions as some of the trails they leave behind are definitely not straight!.. and it must be 'Huge Winds' to be able to even move them a little!.. Nice Post and Pictures..by the way!