Sorry but those nodules did not always separate from the matrix. And
they are entirely feature-less.
As proof here is a slice with both lithologies (thank you Serge!)
http://www.impactika.com/chely-slice.jpg
Sorry, not for sale, will be made into thin-sections (large ones with
both lithologies).
Anne M. Black
www.IMPACTIKA.com
[email protected]
-----Original Message-----
From: Michael Farmer <[email protected]>
To: Galactic Stone & Ironworks <[email protected]>
Cc: Meteorite List <[email protected]>
Sent: Wed, Apr 24, 2013 6:55 pm
Subject: Re: [meteorite-list] Chelyabinsk - IMB or SMB? The
nomenclature of Melts.
The meteorite is an IMB. These nodules being harder than the matrix
were
separated into individuals when the meteorite exploded.
They are like thousands of Cat Mountains.
Michael Farmer
Sent from my iPhone
On Apr 25, 2013, at 6:41 AM, "Galactic Stone & Ironworks"
<[email protected]>
wrote:
Hi List,
We keep hearing about the "IMB nodules" that have been recovered -
these have an all-black lithology with no chondrules, shock veins, or
grey matrix material.
However, these nodules were not created on impact. Had there been
such an impact, we would have a visible crater and the nodules would
be located in a radius directly adjacent to the crater amidst the
ejecta. Instead, these nodules were apparently created during the
fragmentation events that took place while the body was still in
atmospheric flight.
If this is true, shouldn't these nodules be called "shock melt" and
not "impact melt" ?
Is there any distinction in the official nomenclature between an
impact melt and a shock melt?
Is it correct to continue using IMB in reference to these Chelyabinsk
specimens?
Best regards,
MikeG
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