The latest Rosetta Blog post features an image which the context of several areas of change can be located. Tekhenu, and the area of the main Anuket crack is in profile and foreshortened. The rockfall area (Sah) is just in shadow on the edge of a raised layer of rough cometary surface.
In the foreground is the "Dinosaur footprint" sublimative erosion which expanded the area relative to the boulders, which remain unchanged. This has been explained in A. Cooper's blog, and I will put a link in in time.