"Upheaval Dome", That sounds like a great name for a rock band.
The more I think about it. the more I'm inclined to think the brilliant white spots on that crater floor have more to do with how the image was processed than anything else.
No doubt, the white spots scattered around the planetoid are real, and some process suggested by your example may very well be their cause. But it is likely that the imagery may have been deliberately processed so that areas brighter than their surroundings are boosted in brightness to make them stand out easier. In other words, the bright feature may be real, but the exaggerated high contrast against its surroundings may be an artifact. It might just be dirty snow after all.
Keep us posted as new imagery comes in.
Space/Science » in reply to Upheaval Dome
Zit city...or the planetoid pustule.