[meteorite-list] Re: Franconia Meteorites/Variation, Classification & Confusion

From: John Birdsell <birdsell_at_meteoritecentral.com>
Date: Thu Apr 22 10:31:12 2004
Message-ID: <4075E653.2070804_at_email.arizona.edu>

Hi Dave, yes that's right. As a matter of fact some small irons have
been found as well as some chondrites containing large iron nodules. It
wouldn't be too surprising if the small irons turned out to be the
remains of a nodule containing chondrite that fragmented at altitude.
As far as classification goes I believe that the majority of different
types are being classified as we speak. In any case, the slices that we
posted from Franconia wash are, as we mentioned, unclassified. It will
be fun to see how may different types eventually come out of this region!

Cheers


John



Dear All,
So what will be the opinion when an iron or pallesite comes out of
there? Two or three different chondrites you say and we will call them
all H5 regardless of the LL5 to H5...mmm....seems like there needs to be
a bunch more classification to do to me. With out classification, maybe
they are not unlike some NWA's...orphans from a known location?
Not to feed the ducks,
Dave Freeman

John Birdsell wrote:

> Hello everybody. This is just to clear up some confusion that has
> arisen regarding meteorites recently found in the Franconia wash
> region east of Kingman, AZ. As a number of you already are aware,
> there have been a number of new Chondrites found in the region loosely
> referred to as "Franconia wash". These appear to range in composition
> from LL5 to H5. We have at least two and perhaps three different
> Chondrites from this region (none of which have been classified as of
> yet). Bob Verish has one of these meteorites which has been
> classified as an (H5) and given the name 'Franconia'. In a recent
> posting Bob stated that only his stone can "be properly called
> Franconia". We are assuming that he meant that only his stone can
> properly be called the Franconia 'type specimen'. As with any
> meteorite fall, all individual members of that fall are both
> individually and collectively referrred to by the name given to the
> type specimen, in this case 'Franconia'. We have posted on our
> website (http://www.arizonaskiesmeteorites.com) several slices from an
> individual found in the Franconia wash strewn field by Jack Schrader,
> which we stated was unclassified and which appears to be extremely
> similar to the Franconia slices posted by Bob Verish
> (http://www.geocities.com/bolidechaser/mrf/franh5-g.jpg). Please
> compare these slices and draw you own conclusions. It is of course
> possible, though not very likely, that two very similar meteorites
> fell in the same strewn field. If indeed these are from the same fall,
> then they should of course all be referred to as 'Franconia'. If they
> are from a different fall, then they represent a New, and as yet
> unclassified, Arizona chondrite. In either case, this is an exciting
> find, and once the classification of these chondrites is verified we
> will update everyone. This might be a good opportunity to get a nice
> slice from a new Arizona Chondrite while the prices are still
> reasonable. If anyone has any questions please feel free to email us.
>
>
> Thanks
>
>
> John & Dawn
> Arizona Skies Meteorites
>
>
>
>
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Received on Thu 08 Apr 2004 07:54:59 PM PDT