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

[M come Meteorite Meteorites]

warning, or some persons says you have find some
Pultusk in the site....

Matteo

--- Norm Lehrman <nlehrman at nvbell.net> ha scritto: 

> List,
> 
> 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
> be. 
> 
> 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,
> Norm
> (http://tektitesource.com)
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