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

[Jeff Grossman]

The Nomenclature Committee is not the arbiter of such issues. The 
MetBull is just like any other publication when it comes to the use 
such terms, the product of editing by a group of scientists, and no 
more or less authoritative than other publications.

jeff

At 08:36 AM 9/2/2005, Greg Hupe wrote:
>Hello Martin and List,
>
>First I would like to correct statement in your email to the list:
>"On the occasion of an ebay auction, namely NWA 2704 "SMB H4".
>
>NWA 2704 is a nice L3.8, S2, W2, not an H4. I believe the meteorite 
>you meant to refer to was NWA 2706 which is a beautiful shocked and melted H4.
>
>Here are a couple picture links of NWA 2706 showing the 
>characteristics of this beauty:
>
>Click here to view 48.9 gram complete slice displaying breccia
>http://www.lunarrock.com/nwa2706/nwa2706a.jpg
>Click here to view 48.9 gram complete slice displaying abundant metal
>http://www.lunarrock.com/nwa2706/nwa2706b.jpg
>
>The term "Shock Melt Breccia" is a term used by Dr. Bunch at NAU 
>when he classified NWA 2706 for me. I am not sure if it is a new 
>term used by the NomCom or a preferred term by Dr. Bunch, or if 
>there is a difference between an IMB and a SMB. My guess is they are 
>one in the same. I will talk to him and ask these questions.
>
>Best regards,
>
>Greg Hupe
>The Hupe Collection
>naturesvault (eBay)
>gmhupe at tampabay.rr.com
>IMCA 2185
>
>----- Original Message ----- From: "Martin Altmann" 
><Altmann at Meteorite-Martin.de>
>To: <meteorite-list at meteoritecentral.com>
>Sent: Friday, September 02, 2005 8:04 AM
>Subject: [meteorite-list] Terminological question: SMB vs. IMB
>
>
>>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
>>
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>
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