[meteorite-list] Crater chains

From: E.P. Grondine <epgrondine_at_meteoritecentral.com>
Date: Sat, 19 Jan 2008 07:18:40 -0800 (PST)
Message-ID: <978579.8090.qm_at_web36903.mail.mud.yahoo.com>

Hi all -

Thanks Gran - absolutely right, and we've seen paired
asteroids.

Oh well. That seems to leave ground identification of
impactors with the Earth as about the only way of
splitting out cometary impactors.

E.P. Grondine
Man and Impact in the Americas


--- G???ran Axelsson <axelsson at acc.umu.se> wrote:

> That's an easy one... There are contact binaries and
> rubble piles out
> there and they could easily split up by passing
> close to a planet (tidal
> forces) or by spinning fast from the effect of
> sunlight.
> There is also a high probability for asteroides in
> close orbits around
> each other.
>
> /G???ran
>
> E.P. Grondine wrote:
> > Hi all -
> >
> > Unless someone has a disintegration mechanism for
> > stoney, stoney iron, and iron impactors before
> they
> > hit -
> >
> > Then one hypothesis would be that any time you
> have a
> > crater chain, it would be from cometary impact.
> >
> > Are there studies of crater chains on Earth which
> > indicate what hit?
> >
> > E.P. Grondine
> > Man and Impact in the Americas
> >
> >
>
>



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Received on Sat 19 Jan 2008 10:18:40 AM PST