Residents of Issingdown are advised to take cover. )-:
However, I did find this interesting photo of Iapetus showing a 16km-tall ridge, on which it appears that some craters were formed before the ridge, & others after. Bit of a head-smacker for people trying to figure out how it all happened, I reckon.
There was also this conversation full of mind-blowing little observations. They’re trying to explain it all electrically, of course, but they certainly have a bit of courage to even face that tangle at all!