[meteorite-list] Terminological question: SMB vs. IMB

From: Martin Altmann <Altmann_at_meteoritecentral.com>
Date: Fri Sep 2 07:56:47 2005
Message-ID: <004d01c5afb6$74911120$91599a54_at_9y6y40j>

Hello list,

 On the occasion of an ebay auction,
 namely NWA 2704 "SMB H4",
I was asked by a collector, what the difference could be between an impact
melt breccia IMB and a "shock melt breccia - SMB".
Honestly I don't know the difference, as I never heard this term "SMB"
before and was thinking, that all shock and melting processes in ordinary
chondrites were caused by impacts.
>From the picture of the auction I can't tell much, as the cut surface of the
specimen is small and it's looking to me not diffrent from an IMB.
Is SMB now a term of the official nomenclature and what shall I respond to
the collector?

Many thanks,
Martin
Received on Fri 02 Sep 2005 08:04:21 AM PDT