Clavius Question

I have searched the internet for information regarding the the formation of the craterlets on the floor of Clavius, but have not found any theories regarding them. It is my belief that they were formed by the breakup of a comet or asteroid, and the arc was the result of the largest pieces hitting in order of their size as the moon rotated; as determined by gravitational pull. All comments will be appreciated.

Attached Image:

Well, the profile and absence of any intersecting features does not contradict a common origin. Have not seen other orbiter photos, do you know of an on-line source for Clavius that shows better detail and resolution?