Thanks for the legend. As I was putting the post together, I thought 12,900 years ago isn’t a long time; there ought to be myths or legends that describe this impact, if it happened.
But the description in this legend doesn’t seem specific enough to identify it with a massive impact near Quebec that splashed debris as far as Jersey. It could have been any impact or Chelyabinsk-type event 10000-1 BC big enough to destroy a fort.
Do you know of legends from other tribes that could refer to a massive impact?
If you read Firestone’s book you will see that debris has been found a lot farther south than NJ.