I’d like to see the raw unprocessed images. The spots seem extremely bright to me. Nearly too bright to be salt or ice. In fact the objects are so bright, it appears they’ve been enhanced, altered or manipulated.
I’m no expert, but I’ve read that the majority of the surface is dark like as asphalt. They bumped up the exposure to bring out detail in the dark surface, but that blows out anything that’s brighter than the dark surface. So the bright spots may be barely white, or gray.