Once again, I am not a field geologist, and thus really can not comment on your particular hypothesized astrobleme.

My area is traditions (the First Peoples accounts of what occured) and
some archaeological sites. I've had a stroke, and I pretty much gave links to all of that I have in my post on the pathetic state of NASA impact research.

What I can tell you is that based on quarry usage and "abandonment",
about 90-95% of the people living in North America died ca 10,900 BCE.

Aside from that, it will take field geologists to identify the points of the impact(s), and to sort out the airbursts.

The real problems here are the lack of money and Morrison's refusal to support investigations into recent cometary impacts.

That said, my guess is that the structure to which I gave a link may be one of the impact points (I can say that there were others) and that the Ilturde crater in South America is also a likely candidate, in other words MAY be another of the impact points.

I would also like to mention that I have doubts that chain of massive craters Firestone's team found on the floors of the Great Lakes are impact points from this event, based on the simple facts of where people survived this event, and how many survived, and their accounts of it.

Like Firestone's team's crater chain, you may have an impact astrobleme from this event, or perhaps from another. The important point here is how often these things hit, and how little we have still done in mapping astroblemes. In other words, figuring out exactly what his when.

I've pretty well done as much as I can do. I can also express my thanks to you for taking the time to look.

E.P. Grondine
Man and Impact in the Americas