[meteorite-list] Still glowing---32 Nevada finds this week!

From: Norm Lehrman <nlehrman_at_meteoritecentral.com>
Date: Sat Dec 17 00:45:21 2005
Message-ID: <20051217054518.14241.qmail_at_web81010.mail.mud.yahoo.com>


I had a meteorite talk to give this past Wednesday
about the remarkable new meteorite finds in Nevada,
and I wanted to be able to say "we've already found X
more this week", so Monday I took a newbie out and we
found eleven in about 5 hours. That felt so good we
went back out today and found 21 more!

This is not a new find, but proof that it's always
worth going back to the old ones one more time.

The science is even more cool. I have coordinates for
23 previous finds. Plotted together with ours, these
form a tight strewn field about 0.8 miles long and 0.4
miles wide. The tight scatter suggests a low final
explosion, and as would then be predicted, most of the
fragments have sharply angular faces and no secondary
fusion crust. A small percentage of the pieces have
remnants of the primary crust. It is a squeeeky clean
story, and I'll write it up in detail when and if the
previous finders share any additional info there might

As an interesting aside, I was all focused on fusion
crusts and sensuous rounded shoulders and was finding
nothing. My neophyte buddy was checking every pebble
with a magnet, and predictably, he found the first
two. I started using the magnet more liberally and
quickly caught up. Before long, both of us had our
eye tuned to the beautiful mahogany browns (and sharp
angularity!) and then started really making progress.

This story is going to raise another interesting
issue. The 8 pieces that have been classified from
this tiny scatter have gotten L6, H4, H5, and H6
designations. How much variability can you get from a
single fall (when working with <10 gm fragments)?
This little patch is not likely composed of multiple
falls. Has this matter been addressed before?

Still glowing,
Received on Sat 17 Dec 2005 12:45:18 AM PST

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