So another one I have less confidence in but I'll make record of it just in case. I figure publishing it here is my way of saying "Dibs!" as if there was some sort of meteor impact land grab or something. Anyways, I present to you suspect impact site number two.Initially it looked promising but the more I examined it, with NASA's World Wind height exaggeration feature, its looking less and less probably, but there are certain features of it that make it an interesting possibility.

5x Height Exaggeration:

10x Height Exaggeration:

As you can see there are at least two possible concentric ring features.. the reddish scarp to the southeast and the inner one. But the level central depression with no central bulge, and an 8 mile diameter don't seem to fit the model.