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Extinctions and impacts
- To: meteorite-list@meteoritecentral.com
- Subject: Extinctions and impacts
- From: "E.P. Grondine" <epgrondine@yahoo.com>
- Date: Tue, 15 Jun 1999 11:06:06 -0700 (PDT)
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- Resent-Date: Tue, 15 Jun 1999 14:06:59 -0400 (EDT)
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Hello Phil and all -
--- Phil Bagnall <phil@ticetboo.demon.co.uk> wrote:
>snip<
> My gut feeling, for what it is worth, is that while
> the K/T event was
> probably due to a giant impactor, the other mass
> extinctions probably were
> not.
My interest lies with smaller historical impactors, so
I can't reel this data off the top of my head, but I
think that if you check with the Cambridge Conference
Archives maintained by Bob Kobres on his web site,
you'll find that every mass extinction has now been
linked with contemporaneous impact crater(s).
more...
> The lack of recent extinction episodes is
> consistent with an evolving
> Earth in which geo-catastrophic events decline with
> time as the Earth
> settles into a state of equilibrium.
It may also be that most of the "debris" left over in
our solar system has finally acreted, but I wouldn't
bet my life on it, or any one else's for that matter.
EP
>
> Phil Bagnall
> www.ticetboo.demon.co.uk
>
>
>
>
>
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