AW: [meteorite-list] Dhofar vs. NWA meteorites

From: Rob McCafferty <rob_mccafferty_at_meteoritecentral.com>
Date: Fri Jun 9 00:07:12 2006
Message-ID: <20060608202923.53179.qmail_at_web50913.mail.yahoo.com>

Bob

I've bought a couple of kilos of unclassifed NWAs to
use as giveaways and to practice cleaning up, cutting
and polishing.
I have noticed that quite a substantial proportion of
the ones I've opened up DO have weathered interiors
and fine shock veins. As a guess I'd say 20-30%. I'd
need to check to be more accurate than that.
I realise I'm only looking at a small sample and am
describing the interiors of less than 50 small
individual rocks but I can assure you it does occur.
It depends on how representative my samples are and
the quantitative definition of "many" vs "few".

Regards Rob

--- "lakewind_at_infionline.net"
<lakewind_at_infionline.net> wrote:

> Hi Martin,
> Thanks for your observations on Dhofar vs. NWA. What
> you wrote makes sense.
> However I still wonder why many of the Dhofar
> chondrites have so many fine
> shock
> veins compared to the NWAs. Any thoughts?
> Bob
>
>
> Original Message:
> -----------------
> From: Martin Altmann altmann_at_meteorite-martin.de
> Date: Thu, 8 Jun 2006 14:36:29 +0200
> To: Meteorite-list_at_meteoritecentral.com,
> lakewind_at_infionline.net
> Subject: AW: [meteorite-list] Dhofar vs. NWA
> meteorites
>
>
> Hi Bob,
>
> >So we have two reasons:
> The more harsh weathering conditions in Oman
> and a economical one, that from the NWA one sees
> only the tip of the
> iceberg's weathering scale, cause the more rotten
> stuff doesn't sell.
>
> Buckleboo!
> Martin
>
>
> -
> Hi all,
> I've seen a good number of Dhofar and NWA common
> chondrites and
> I've noticed that there are many among the Dhofars
> which exhibit highly
> weathered interiors laced with rich, thread-like
> shock veins. These
> veins seem to be far less common in NWA chondrites
> and I wonder
> why. Can anyone shed light on this little mystery
> (for me)? Thank you!
> Bob
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Received on Thu 08 Jun 2006 04:29:23 PM PDT