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Re: dino extinctions and meteorites

>phanerozoic, the biggest of which was the terminal Permian
>at 284 Ga (billion years before the present).  That one
>killed off about 96% of all species in th e fossil record.

Do you mean megaannum (Ma), million years before present and isn't the end
of the Permian more like 245Ma?

Cheers, Paul


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