[meteorite-list] Amgala versus Zag

From: Adam Hupe <adamhupe_at_meteoritecentral.com>
Date: Thu Apr 22 10:32:50 2004
Message-ID: <03c901c40a0d$2f803340$62f61018_at_attbi.com>

Dear Bernd, John and List members,

I thought one distinction made for a regolith breccia is that there are
signs of crystal damage caused by the solar winds. In Zag and Howardites I
believe this shows up as darker areas. I also read somewhere that Zag has
four lithologies. No such crystal alterations has been reported in Amgala.

All the best,

Adam



----- Original Message -----
From: <bernd.pauli_at_paulinet.de>
To: <j.divelbiss_at_att.net>; <adamhupe@comcast.net>
Cc: <meteorite-list_at_meteoritecentral.com>
Sent: Sunday, March 14, 2004 11:57 AM
Subject: Re-2: [meteorite-list] Amgala versus Zag


> > As for polymict versus regolith breccia ... can these two terms be
> > interchangeable? A polymict breccia is made up of clasts/fragments
> > of different materials probably caused by a impact mixing, while a
> > regolith breccia implies a breccia formed at the surface with a mixture
> > of different materials caused by impacts. A regolith breccia might be
> > considered a special type of polymict breccia.
>
> Hello again,
>
> In Met.Bull. 87, 2003 July, p. A196, the Dhofar 310 lunar meteorite is
> described as "a fragmental regolith breccia", and, on page A30 of the
> same issue, it is described as a "polymict breccia".
>
> Reference:
>
> DEMIDOVA S.I. et al. (2003) Lunar meteorite Dhofar 310: A polymict
> breccia with deep-seated lunar crustal material (MAPS 38-7, 2003, A030).
>
> Best wishes,
>
> Bernd
>
> To: j.divelbiss_at_att.net
> adamhupe_at_comcast.net
> Cc: meteorite-list_at_meteoritecentral.com
>
>
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Received on Sun 14 Mar 2004 04:42:01 PM PST