à primeira vista parece gelo e neve...Também estive numas salinas na Ilha do Sal (Cabo Verde - Africa) e fiz algumas fotos de la....muito bonita esta sus!!!
i´m not sure, but I think in this place had a sea in the past.. or something like it..
.. here you can read about it: http://en.wikipedia.org/wiki/Salar_de_Uyuni this place is amazing...