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Re: Rethinking What Caused the Last Mass Extinction


Interesting. Is reworking ruled out? (Not from the condition of the specimens in the photo.)

Because... I don't see how it's possible to have a local extinction of ammonites. Ammonites had planktonic larvae. Either you kill them all worldwide at once, or the survivors fill the oceans again within a few generations, as happened after the Devonian-Carboniferous, the Permian-Triassic, and the Triassic-Jurassic mass extinctions. In other words, the fact that the ammonites are extinct is good evidence that they died out in a catastrophic mass extinction.

This is consistent with the last paragraph of the article, which describes a Strangelove ocean above the supposed Paleocene ammonites.

Bringing up supposed gradual dinosaur extinctions doesn't earn the article any brownie points... (And "rethinking" is an extremely unfortunate word choice, IMHO.)