What's the literature say about the central-ish pedestal region?

It seems that to the east, the infill from Hesperia Planum volcanism (and the smaller shield to the south) has filled the crater so the floor level is up to the pedestal although a distinction can still be made even with MOLA. To the west however, the distinction between what I'm thinking of as a rebound pedestal and the surrounding terrain seems more obvious.

Clearly, a few Gy is enough time for mechanical erosion to do a significant ammount of etching and this has affected the surface of the crater floor but is there another mechanism in the literature or your wildest dreams that could form a central pedestal provence?