[meteorite-list] Crater chains

From: ted brattstrom <volcanoted_at_meteoritecentral.com>
Date: Sat, 19 Jan 2008 12:46:58 -0800 (PST)
Message-ID: <332379.77654.qm_at_web53606.mail.re2.yahoo.com>

Aloha -

Just a short note/comment -

The "Crater Chains" seen on the Mercury images, as
well as on Lunar images are secondary craters - caused
by the impact of ejecta from the initial impact. They
head out radially from that initial impact.
Occasionally you can find tertiary craters - from the
impact of ejecta from the secondary impacts :-) :-)


This is not to be confused with the idea of crater
chains from a group of impactors that came from an
initial object that fragmented - (or was impacted) at
some time in orbit. (eg SL9)

I would highly suspect "crater chains" of this nature
would not be in close proximity to each other...

Cheers - ted


--- "E.P. Grondine" <epgrondine at yahoo.com> 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 03:46:58 PM PST