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Re: dinosaur survived past asteroid impact
"But, clearly, not all species (of dinosaurs) became extinct," said
Heaman. "And so could there be some sort of micro-environment where
these dinosaurs perhaps had an oasis or a haven where they could
An oasis or haven that persists for _seven hundred thousand years_, and
even though a population of sauropods survives in it, no dinosaurs ever
spread out of it?
That just doesn't make the slightest ecological sense.
What I suspect is going on is miscalibration between U-Pb and Ar-Ar or
something. The age of 65.5 Ma for the K-Pg boundary comes, IIRC, from an
Ar-Ar analysis; a U-Pb age for the impact is, however, 64.98 +- 0.05 Ma.
While 64.8 still lies outside that range, it's damn close, and the news
article doesn't say what the error bar on that age is like.
And while I am at it, I hate it when news articles are 10 or 15 years
behind the times:
Recent studies have challenged that theory include some suggesting a
series of meteorite impacts caused the dinosaurs to disappear and
others positing massive volcanic eruptions that triggered deadly,
planetwide climate disturbances.