[meteorite-list] Impact Melt Breccia Statistics / BISON

From: Alexander Seidel <ase_at_meteoritecentral.com>
Date: Thu Apr 22 10:13:08 2004
Message-ID: <3EA70D69.90A9C271_at_planet-interkom.de>

Hello Pekka and list,

according to MetBase ((c) Joern Koblitz) BISON is an LL6 impact-melt
breccia, shock-stage S4. It is indeed a very beautiful stone, slices
of which show multi-colored clasts in a dark matrix. Here is what the
MetBase record on BISON also says:

"A mass of about 3kg was found about 6.8 km NE of Bison, olivine
Fa31.9, Met. Bull. 62, Meteoritics, 1984, 19, p.50. Another piece of
8kg was found in 1958. A heavily shocked breccia, olivine Fa31.9,
A.L.Graham et al., Cat. Met., 1985, p.73. Classification and mineral
analysis, an impact-melt breccia, consisting of unmolten clasts and
accessory melt-breccia clasts in a darkend matrix, B.Dominik and
F.Bussy, Meteoritics, 1994, 29, p.235."

Alex
Berlin, Germany

Pekka Savolainen wrote:
>
> Hello,
>
> seems I have two kind of information about Bison, David Weir lists
> it as LL6 and f.e. Jenssen, Jenssen and Black as LL6 imb. Perhaps
> Anne M. Black have more information, also to me this looks more like
> LL6, but hard to say.
>
> I´m sending this also straight to Anne M. Black in hope to get some
> more information about the difference in classifications.
>
> take care,
>
> pekka
Received on Wed 23 Apr 2003 06:02:17 PM PDT