[meteorite-list] Rocks from Space Picture of the Day - July 19, 2008

From: Mike Jensen <meteoriteplaya_at_meteoritecentral.com>
Date: Mon, 21 Jul 2008 11:06:43 -0600
Message-ID: <6f9da8300807211006l2e8834fbt755522226fc1bdbf_at_mail.gmail.com>

Hi Michael and list

The text list this stone as a ACHANOM or achondrite anomalous. But if
you look it up in the MB database it is listed as a Eucrite.
http://tinyurl.com/5f4hxy
According to several papers that were reference it has always been
classified a Eucrite. If a change in classification has been suggested
then a supporting scientific paper should be referenced.
I only point this out as once outdated or incorrect information makes
it onto the web it is very hard to correct it. Besides it only takes a
minute to look it up in the database.
I also would like to point out that if the ACHANOM is the new correct
classification then a more accepted terminology is Achondrite
ungrouped. Anomolous is for meteorites that closely fit into to
recognized chemical groups but do have one or more points that are
outside the norm. So you could have Eucrite anom or IIAB anom or H5
anom etc but you cannot have iron anom or stone anom or chondrite anom
etc. The latter should be ungrouped. Right now for instance there are
almost 100 ungrouped iron meteorites. Someday they will be placed into
a new group but of course at least 6 are needed to make up a new
group. The 100 ungrouped irons should not be confused with over 75
irons which have not been classified. They are just listed as irons
but could and maybe should be listed as iron-unclassified.


Mike

--
Mike Jensen
Jensen Meteorites
16730 E Ada PL
Aurora, CO 80017-3137
303-337-4361
IMCA 4264
website: www.jensenmeteorites.com
On Sat, Jul 19, 2008 at 5:29 AM, Michael Johnson
<michael at spacerocksinc.com> wrote:
>
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Received on Mon 21 Jul 2008 01:06:43 PM PDT