Up and Down
As so often, the image is misleading - use the craters as a guide -if they appear as domes, then the image display is wrong for your eyes. This NOT a bulbous glacial hill, but a large old crater - a circular depression. As with many areas on mars, it has wrinkles and folds in its floor related to long-ago ground creep of ice-saturated soil and rubble. It is unlikely to contain large qualtities of near-surface ice.
Just because something is "White" does not make it water ice. this could easily be sulphate minerals, as we see in so many other depressions on Mars.