The KT layer for example is a worldwide sedimentary layer.
Oh boy. Another old dried up creationist PRATT. Hadn't heard this one in almost a decade.
The KT boundary (these days it's called the K-Pg boundary) is the result of a big honking space rock that messed up the dinosaurs' day one afternoon. It disrupted their lunch then annihilated the whole lot (except the avians) spreading fire and iridium all over the place.
Not a good day. That was 65 million years ago. Don't try to give me any of this "other" nature crap to try and change that timeline. It is set in concrete and nothing you can do is going to change it.
Had nothing to do with your non-existent flud.
And to ignore all the evidence around this one would be the extreme depths of stupid.
You really have to be way desperate to get this dumb..
For all we know, it could have been a fountain of the deep that is no longer active in Yucatan that may have shot stuff upward. (impact from below). You could be misreading evidence. Now if you can prove otherwise, fine. Your little statements have zero value as anything other than statements of faith meanwhile though, of course.
So, impact, yes! Impact around the time of the dino demise, yes.