Unnamed "Ghost" Crater near the South Pole (EDM - Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit)

Creep of the Crater Wall Material may have also played a role in erasing the Crater. This far South, the Surface Material is likely to be ice-rich and will slowly flow downhill. Additional evidence for near-surface ice is provided by the pervasive Polygons in the image, forming due to stresses caused by temperature variations in ice-rich ground.
Regardless of the mechanism, the Crater remains faintly expressed in the surface morphology. Note that the Surface has a similar texture away from the Crater, but not organized into concentric arcs. The residual structure of the Crater provides some control on stresses, producing the ringed pattern.