[SunkenCiv]

No, they’re not. The bays were formed and the black mat was laid down at that time; various erosional events came later, and uniformitarian jokers messed up the dating, even when they actually did field work.

[muawiyah]

Why not do it this way ~ they didn't happen at the same time because they came in from the WRONG direction. On the other hand, if this was merely the debris left over from a broken up comet and we went through the debris belt several times over a number of trips around the Sun, you could, of course, have the same sort of events ~ big holes ~ but the entry angle would be different each time.

Figuring out how to get different entry angles for a single event is rather difficult. Two events explain things easier, and a comet breakup is a well known phenomenon. In fact, many of our best shooting star events are simply us taking a trip through a comet's path (over and over and over).