It was my impression that he was searching
for a recent fall from the observed fireball.
Or maybe I got that confused with another
thread. So I posted what recent falls, fresh
falls, would look like.
In the Eastern US, the Midwest, the high
rainfall, the freeze-thaw cycling of winters,
and the high porosity of meteorites pretty
much guarantees that a chondrite will be
transformed, even disintegrated, in short
order.
Deserts are a different story.
Such states have an abnornally high per-
centage of their finds as irons and stoney-
irons. Of the eight meteorites in the 2000
edition of the NHM Catalogue listed for
Pennsylvania, only three (38%) are non-iron,
while 90% or more of the meteorites that
fall there (and everywhere else) are stones.
Why? Stones don't survive in those conditions.
Sterling K. Webb
-------------------------------------------------------------
----- Original Message -----
From: "Greg Stanley" <stanleygr...@hotmail.com>
To: <sterling_k_w...@sbcglobal.net>; "Mike Hankey"
<mike.han...@gmail.com>; <meteorite-list@meteoritecentral.com>
Sent: Wednesday, September 16, 2009 6:47 PM
Subject: Re: [meteorite-list] Strange Rock Reports
All:
I would say it's not that cut-n-dry. I have found highly weathered
meteorites that do not look like the ones Sterling has posted. I agree
that the ones Mike posted they are most likely slag and definitely are
not from a fall, but you never know. I like to keep an open mind.
Most of the meteorites I find on Lake Beds have no fusion crust, are
often fractured or broken so they have sharp edges. Even a few are very
weakly attracted to a magnet due to oxidation. I found one and it
looked just like a piece of dark red jasper. When it felt heavy and
stuck to a magnet, I knew it was a meteorite.
Good luck Mike and keep at it.
Greg S.
----------------------------------------
From: sterling_k_w...@sbcglobal.net
To: mike.han...@gmail.com; meteorite-list@meteoritecentral.com
Date: Wed, 16 Sep 2009 18:31:16 -0500
Subject: Re: [meteorite-list] Strange Rock Reports
THIS is a meteorite that has been on the
ground awhile, years, decades, centuries,
millennia? but is only partly degraded.
It's lost its gloss but it's perfectly plain
what it is:
http://astronomy.swin.edu.au/cms/astro/cosmos/M/Meteorite
THIS is a meteorite that just fell only days
before some sharp-eyed fellow picked it up:
http://meteoriteguy.com/lamanchaspainfall/lamancha555a.JPG
What you are holding in your hand is SLAG.
I mean, I don't want to be overly blunt here,
but that's not the kind of rock you want to
expend effort on finding. Toss it in the question
mark barrel and go find one like the two pix
above. You'll be a lot happier...
Sterling K. Webb
------------------------------------------------------------------
----- Original Message -----
From: "Mike Hankey"
To: "meteoritelist"
Sent: Wednesday, September 16, 2009 2:23 PM
Subject: [meteorite-list] Strange Rock Reports
I’ve gotten about six strange rock reports so far which is great! It
shows the locals know meteorites could be on the ground and they are
keeping an eye out for them. I have been able to identify most of the
rocks I’ve seen so far, but this one in particular I’m not sure about.
If anyone knows what this rock is please let me know. It is very hard
and magnetic seemed like a lot of metal in it. It is pretty weathered
and hard to tell if it has a crust on it or not.
http://www.mikesastrophotos.com/wp-content/uploads/2009/09/gideon-rock1.jpg
http://www.mikesastrophotos.com/wp-content/uploads/2009/09/gideon-rock2.jpg
http://www.mikesastrophotos.com/wp-content/uploads/2009/09/gideon-rock3.jpg
http://www.mikesastrophotos.com/wp-content/uploads/2009/09/gideon-rock4.jpg
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