> Very few dinosaur remains have been found in the rocks that record even the final few thousand years before the impact. To have a specimen from the cataclysm itself would be extraordinary.

My understanding is, per an article in The Atlantic (and others I'm sure) a couple+ years ago, the modern theory is that excessive worldwide volcanic activity was already killing the dinosaurs for many years, the asteroid was simply the final death blow.

The fact that finding dinosaurs in the asteroid time frame seems to led support to the modern theory. That is, you can't find what wasn't there. The dino numbers were already significantly minimized.

Sidebar: The bonus I found in The Atlantic article is it got into the politics and (dare I say) close-mindedness of that "industry." For tbose fond of "trust the science" this article adds a darkside to that slogan.

https://www.theatlantic.com/magazine/archive/2018/09/dinosau...

https://massextinction.princeton.edu/