[meteorite-list] Dino killer size

[E.P. Grondine]

Hi Sterling - 

I would imagine a lot of the cosmic osmium would have
been "sequestered" in the impact spherules. The KT
fossil meteorite seems to have been ignored by this
group, so

How would you determine the composition of what hit?
First, take samples from around the crater. Then
working from known densities and crater size, estimate
your velocity.

That said, the idea of using osmium ratios as a way of
detecting impacts to have occurred looks valid.

E.P. Grondine
Man and Impact in the Americas



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